NCD986187128_19990423_North Belmont PCE_FRBCERCLA SPD_HRS Document Package for NPL Proposal-OCR

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Mr. Jack Butler
REGION4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
North Carolina Division Wiste Management
North Carolina Department of Environmental,
. and Natural Resources
P . 0 . Box 2 9 6 CJ3
Raleigh, North Carolina 27611
SUB,1: National Prioriti~s List
Proposed Rule #28
Dear Mr. But.ler:
RECEIVED
APR 2 3 1999
SUPERFUND SECTION
The Agency c.nnounced on Ap!.-il 23, 1999, in t.he F=;_c}.s!ral.
Regts~_§.r., Proposed Rule #28 to the Natiorial Pr:i.oriti<es List;
(NPLl. This rule proposes to add 13 .siteeo to 'ci-.e NPL. Th,;,
Region 4 site is as follows:
Procosed Rule #28:
1. North Be1m6nt PCE Site, No:;::-th Beli:\tont, No1·t.h Ci:tr,Jlir:o.
Various backgroun.::l and supplernenta2-~y inforination per:t:aiEinq
to the rule is located on the Internet. The ir1formation ca.~ be
accessed from tl'-1e· S1..1.perfund homepage under 11 i,1hat' s I:Jsw" and
11 AuxiJ.lary lnfo!:'mat.ion 11 • rrhe exact add!:"esses are list::~c~ be1t)t.,,,.v.
Map with clickable States with a link to nctrrat.ive :;1_;ram0::-ies c:tnci
FR notices:
http:/ /wvr~•l. epa. g·o•v/superfund/si-c.E~s/1:.pl/npl. htrn
Map with clickable States with a lin'< t;o Regional fc:ct sheets:
http:/ /;:ww. ep,i. gov /superfundisite0 s/nplsites /index. htrn
List of new Proposed sites with a link to the fR notices:
http:/ /v,r,r.-1. epa. gov/ suoerfund/r;.=-,;f.' /ne',•:1:irpp. htrr.
If you t:ave any questions, plE;:as~ ·::ont~J.ct IDE-) a': t1(14/561·-·8BJ.'i.
cc: Ms. Pat DeRosa, NCDENR
~ ~-f ~La,--
Cynthia K. Gurley
Region 4, NFL Coordinator
Site Assess.ment Proce:ss O\vTle.r
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable OIi Based Inks on Recycled Paper (Minimum 25% Postconsumer)
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I ·. UNITED STATES ENVIRONMENTAL PROTECTION AGE0NCY . ". · .
I &EPA NATIONAL PRIORITIES LIST {NPL}
OSWER/OERR :, .' , State, Tribal, a~d Site ldentificatii>n Center i I •• · · Wa;hington, DC 20460
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NORTH BELMONT PCE ··
North Belmont, North Carolina".-\;, .
. ~ ·.~'.:~rt{·. •.·U, The North Belmont PCE site is located in a residential neighborhood on Woodlawn Avenue in North Belmont, Gaston County, North \:' ·
Carolina. The site consists of the surrounding residential neighborhood and the former locations of two dry-cleaning operations: the former.-/.<·.
Untz's dry cleaners located at Roper's Shopping Center and the former dry cleaners located at the intersection of Acme Road and Suggs
Road. The dry cleaning establishment at Roper's Shopping Center was operated by the Untz family from 1960 to 1975. Prior to that, the
Untz dry cleaning operation was located at Acme and Suggs Roads. These two locations are believed to be the sources of a plume of
ground water contamination that extends north and east of the Roper Shopping Center and has impacted several nearby residential wells
with tetrachloroethylene (PCE), trichloroethylene (TCE), and I, 1-dichloroethylerie (I, 1-DCE).
In February I 991, the Gaston County Health Department sampled a well that provided water to the North Belmont Elementary School and {/\.·.
two single family dwellings as part of an effort to evaluate the extent of volatile organic compound (VOC) contamination in ~ommunity. :-·'" ·.
water supplies. VOC contamination was detected in the wells. The US EPA Region JV Emergency Response and Removal Branch (ERRB)
was notified of the situation and ERRB collected additional samples on March I, 1991. ERRB and Gaston County Health Department
collecte,d approximately 25 drinking water samples from residential wells in the neighborhood. PCE and/or its breakdown products were
detected in 16 of the samples. As a result, 29 of the neighborhood drinking water wells were taken out of service and conri~cted to the
Belmont city water service. ·
During a subsequent Site Inspection (SI) conducted by the North Carolina Superfund Section in 1993, efforts were made to lf>Cllte the source
of the contaminated ground water plume. No conclusive evidence was collected to identify a contaminant source. A Remedial Investigation
(RI) was conducted at the site from June 1996 through October 1996 by the US EPA Region IV Hazardous Waste Section: The vertical
and horizontal extent of the contaminated ground water plume was delineated within a distance of one half mile north and east of the Roper '
Shopping Center. The remaining unsampled residential wells in the neighborhood were also sampled as part of the RI. Elevated
concentrations of PCE, TCE, and I, 1-DCE were identified in five additional' residential wells in the surrounding neighborhood. Although
samples were collected during the RJ in an attempt to locate the source(s) of ground water contamination, no source(s) could be identified.
[The description of the sire (release) is based on infomuuion available at the time the site was scored. The description may change as
additional information is gathered on the sources and extent of contamination. See 56 FR 5600, February 11, 1991, or subsequent FR
notices.]
Su~rfund hazardous waste site listed under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) as amended
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N~L-ud.i~l--1-il
HRS DOCUMENTATION RECORD--REV:IEW COVER SHEET
Name of Site:
Contact Persons
North Belmont PCE
NCD 986 187 128
North Belmont, Gaston County, NC
Site Investigation: G, Doug Rumford
Documentation Record: G. Doug Rumford
USEPA Region IV: Cynthia Gurley
Pathways, Components, or Threats Not Evaluated
{919)733-2801 x279
{919)733-2801 x279
{404) 562-8817
This documentation record addresses the source description and
groundwater migration pathway only. The groundwater to surface water
component was not scored. The surface water, air migration, and soil
exposure pathways were not scored because they contribute only minimally to
the final score.
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Name of Site:
EPA Region: IV
HRS DOCUMENTATION RECORD
North Belmont PCE
NCD 986 187 128
Date Prepared: 5/1/98
Date Revised: 4/9/99
Street Address of Site: Woodlawn Ave.
North Belmont, NC
County and State: Gaston, NC
General Location in the State: Piedmont
Topographic Map: U.S. Geological Survey 7.5-minute Series Topographic
Quadrangle Map for Mount Holly, NC 1970
Latitude: 35°16'24.5" Longitude: 81°03'04.5"
Note: Latitude and Longitude calculation based on approximate location of
former Untz dry cleaning operation · at Roper Shopping Center .. (Ref. 3 I
Scores
Air Pathway
Ground Water Pathway
Soil Exposure Pathway
Surface Water Pathway
HRS SITE SCORE
2
not scored
100.00
not scored
not scored
50.00
.:•·!,.•-~ . . .• .. ~ ,., ... ,~;~·-: .
. .: . -~
.. -.;,:· .
. ; Y•
Fig. No: Title: Site Location & Topographic Setting
1--,-,N_o_r~t~l-1 -C~a_r_o~l~1rn-a-~O~i-v-irs~i-o_n_o_f,-.j North ll e lmo n t PC E Site
Waste Management Source: USGS Topographic Map: Mount llolly Quadrangle, 1970 ' . '
Superfund Section ·scale: 1: 24000 Date: 4 /l / 99 Modified By: G.D. Rumford
Site Name: Nortl1 Delmont PCE Site NCO 980 IIJ7 128 ~-------------------
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WORKSHEET FOR COMPUTING HRS SITE SCORE
s'
1. Ground Water Migration Pathway Score (S~)
(from Table 3-1, line 13)
s
100.00 10000.00
2a. Surface Water overland/Flood Migration Component .Not Scored
(from Table 4-1, line 30)
~b. Ground Water to Surface Water Migration Component Not Scored
(from Table 4-25, line 28)
2c. Surface Water Migration Pathway Score (S,.)
Enter the larger of lines 2a and 2b as the pathway
3. Soil Exposure Pathway Score (S,)
(from Table 5-1, line 22)
4. Air Migration Pathway Score ( s.l
(from Table 6-1, line 12)
6. HRS Site Score Divide the value on line 5
by 4 and take the square root
4
Not Scored
score.
Not Scored
Not Scored
50.00
10000.00
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Site Name: North Belmont PCE
Location: North Belmont, Gaston· County, North Carolina
GROUND WATER MIGRATION PATHWAY SCORESHEET
EACTOB CATEGORIES AND FACTORS
Likelihood of Release ta ao Amii fer
1. Observed Release
2.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Potential to Release
2a. Containmeilt
2b. Net Precipitation
2c. Depth to Aquifer
2d. Travel Time
2e. Potential to Release
[lines 2a x (2b + 2c + 2d))
Likelihood of Release (higher
Waste Characteristics
Toxicity/Mobility
Hazardous Waste Quantity
Waste Characteristics
Targets
Nearest WeU
Population
Sa. Level I Concentration~
Sb. Level II Concentrations
Be. Potential Concentration
Bd. Population (lines Ba+ Sb
Resources
Wellhead Protection Area
Targets (lines 7 + Bd + 9 + 10)
Ground Water Migration Score
Aquifer Score
[(lines 3 x 6 x 11)/82,500]'
Ground Water Migration Pathway
Pathway Score (S.,.), (highest
from line 12 for all aquifers
Maximum
550
10
10
5
35
500
550
a
a
100
50
b
b
b
b
5
20
b
100
100
•
b
Maximum value applies to waste characteristics category .
Maximum value not applicable.
Do not round to nearest integer.
5
550
1 00
100
. ' " " '
100 00
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Reference
Nwnber
1
2
3
4
5
6
7
8
9
10
11
12
13
14
REFERENCES
Description of the Reference
U.S. Environmental Protection Agency; Hazard Ranking System 40
CFR Part 300, App.A, 55 FR 51532, December 14, 1990.
U.S. Environmental Protection Agency suPerfund Chemical Data
Matrix (SCDM), App.B, June 1996.
U.S. Environmental Protection Agency Publication 9345 .. 0-0lA;
Guidance for Performing Preliminary Assessments Under CERCLA:
Latitude and Longitude Coordinate Worksheets, App.E September
1991. 2 pages.
Rigger,R.Donald (E.P.A.
File; Request for Removal
April 16, 1991. 6 pages ..
On-Scene Coordinator), 1991. Memo to
Authorization, North Belmont PCE Site.
LeGrand, H.E. and M.J.Mundorff, 1952. Geology and Groundwater in
the Charlotte Area, North Carolina: N.C. Division of Mineral
Resources, Bulletin No. 63. 4 pages (pgs 47-49).
Heath, Ralph C. 1984. Ground-Water Regions of the United States:
U.S. Geological Survey Water-Supply Paper 2242, 1984. 2 pages.
(pg 6)
Rumford,G.Doug,NCDENR-Superfund Section: Memo to File; Review
of Public Water Supply Systems Surrounding the North Belmont
PCE Site. June 14,1993. 3 pages.
Rumford, G.Doug, NCDENR-Superfund Section: Memo to File;
Groundwater Population Estimates per Distance Ring, North
Belmont PCE Site, June 25,1993. 3 pages w/ attachment.
Stanely, Jeanette. NCDENR-Superfund Section: Memo to File; Update
on Status of Wellhead Protection Programs in N.C. December 1.
1997. 1 page.
U.S. Environmental Protection Agency Region 4: Remedial
Investigation Report; North Belmont PCE Site, SESD Project 96S-
058. June 1997. 122 pages.
Heath, Ralph C. 1984. Basic Ground-Water Hydrology: U.S.
Geological Survey Water-Supply ?aper 2220, 1989. 3 pages,
(pgs 7, 9).
Ellis, Mark. Final Report: Well Installation, Sampling and
Preliminary Hydrogeological 'Investigation, North Belmont Road
Site . Roy F. Weston Inc., October 1991. 38 pages.
U.S. Department of Agriculture, Soil Conservation Service, 1989.
Soil Survey of Gaston County, North Carolina. 2 pages (pg 19).
Rumford, G.Doug, NCDENR-Superfund Section: Memo to File;
Selected Residential Drinking \'later Well Information, North
Belmont PCE Site, April 1, 1999. 3 pages.
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REFERENCES
Reference
Nwnber Description of the Reference ··
15
16
17
18
19
20.
Rumford,. G.Doug, NCDENR-Superfund Section: Site
Report; North Belmont PCE Site, NCD 986 187 128.
15 pages.
Inspection
July 1993.
Rumford, G.Doug, NCDENR-Superfund Section: Memo to File; 1991
USEPA ERRB Residential Drinking Water Sample Data: North
Belmont PCE Site. March 30, 1999. 23 pages.
Rumford, G.Doug,NCDENR-Superfund Section: Memo to File; 1991
Residential Drinking Water Sample Data:. North Belmont PCE
Site. March 31, 1999. 16 pages.
U.S. Geologic Survey Topographic Maps: Mount Holly, NC 1:24000
Scale Quadrangle, 1970; Mountain Island Lake, NC 1:24000 Scale
Quadrangle,1983; Belmont, NC-SC 1:24000 Scale Quadrangle,1973.
U.S. Environmental Protection Agency; The Hazard Ranking System
Guidance Manual, Interim Final. November 1992.
Rumford,
Organics
April 8,
G.Doug,NCDENR-Superfund Section: Memo to
Laboratory Analytical Method: North Belmont
1999. 1 page.
7
File; NC
PCE Site.
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SD~Characterization anq Containment
SOURCE DESCRIPTION
2.2 Source Characterization
Number of the source: 1
Name and description of the source·: Source .type "Other": Coritaminated
Groundwater Plume with no Identified Sources
The contaminated groundwater plume is located in a neighborhood of North
Belmont that is adjacent to the North Belmont Elementary School. No
identified source of origination of the groundwater·plume at this site has
been located through observation or sampling. The improper handling of dry
cleaning solvents at a former dry cleaning operation located at the Roper.
Shopping Center on Woodlawn Ave. is the suspected cause of the PCE, TCE, and
1,1-DCE contaminated groundwater plume (Refs. 1, Table 2-5; 15, pp. 2,6;
Fig. 1 of documentation record).
Location of the source, with reference to a map of the site:
The contaminated groundwater plume extends north from Woodlawn Ave. to
the unn·amed tributary to Fites Creek and east to approximately the Piedmont
Northern Railroad line (Ref.10, fig.4-9,p.4-19;. Fig. 2 of documentation
record).
Containment
Release to ground water:
An observed release to the groundwater at the site has been documented
by the detection _of several volatile organiC compounds in monitoring wells
and.drinking water wells located up to at least 1/3-mile from Roper Shopping
Center on Woodlawn Avenue. Therefore, since the source at this site is a
contaminated groW1dwater plume that is migrating throughout the aquifer and
is not contained, a containment factor of 10_ is assigned (Refs. 1, Table
3-2; 4,p.2; 10, fig.4-9,p.4-21; 12, p.30).
Containment Value: 10
8
-------------------·
561500
56\00Q
.E
~ ~ ~ 560500
560000
559500
1386500
Fig. No: 2
North Carolina Division of Solid
Waste Management
Supcrfund Section'
138 500 138 000 138 500 138 000 138 500 1390000 1390500
EASTING, feet
1391000
ug/L
500
,_-,: .. 100
('·.:•. (:fts
10
5
Title: Top of Bedrock Groundwater Plume: PCE ::contamination, October/November 1996 Source:· Remedial Investigation Report, North Belmont PCE Superfund Site US EPA Region rv Hazardous Waste Section, June 1997
Scale: Not to Scale Date: 12/4/97
Sile Name: North Belmont PCE Site
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2.4.1 Hazardous Substances
·so-Hazardous Substances
Source No. : 1
Hazardous substances attributable · to the ncontaminated Gr.oundwater Plume" source include tetrachloroethylene (PCE), trichloroethylene (TCE), and cis-1,2-dichloroethene (cis-l,2DCE) (Refs.10,pp.1-3,4-4;16;17). These subst3nces were detected in the following three (3) wells at concentrations exceeding three (3) times that of background groundwater levels in sample MW-3. The concentration ·of PCE in the background groundwater sample was 8.70 ug/1 while TCE and cis-l,2DCE were not detected (Ref.12,p.24). Background ground water sample MW-3 was collected from monitoring well #3 located on the Roper Shopping Center property(Ref. 10, pp.1-5).
HazardouS Evidence Haz.Substance Sample Substance Concentration
PCE Hughes well 15000.0 ug/1 N.Belmont Sch. 1432.2 ug/1 Mahaffy well 4100..0 A ug/1
TCE Hughes well 194. O ug/1 N.Belmont Sch. 48. 5. ug/1
cis-1,2:0CE Hughes well 664.0 ug/1 N.Belmont Sch. 113. 5 t.ig/1
Note: A; Average Value (Ref. 16, p.22) J; Estimated value (Ref. 16, p.22)
Sample ID
MW-3 150 ft
Quantitation Reference
Lirni t
1.0 ug/1 17,p.6,20
5.0 ug/1 1_7,p.3,20
1200.0 ug/1 16,p.22
1.0 ug/1 17,p.6,20
5.0 ug/1 17,p.3,20
1.0 ug/.1 17,p.6,20
5.0 ug/1 17,p.3,20
Sample Date
6/11/91
The MW-3 sample is a groundwater sample collected from monitoring well #3 located 'behind the· Roper Shopping Center. Sample collected by USEPA Environmental Response Team and labeled MW-3(Refs.10,pp.3-12,4-4,fig.2-3; 12,pp.8,24)
Sample ID
Hughes
Depth
184 ft
Sample Date
2/27/91
The Hughes sample is a groundwater sample collected from the wellhead tap at the Elene Hughes residence located at 109 Goshen St., parcel 74. Sample collected by Gaston County Heal th Dept. and labeled NB-2. This well •.,1as taken out of service and converted to monitoring well CW-3 (Refs.10,pp.3-12,4-4,fig·s.l-5,2-3; 17,p.4;20):
Sample ID
N.Belmont School
Depth
148 ft
Sample Date
2/25/91
The N .Belmont School sample is a groundwater sample collected from the wellhead tap at the North Belmont Elementary School located at 113 School St., parcel 80. Sample collected by Gaston County Health Dept. and labeled A-1. This well was taken out of service and converted to monitoring well CW-4 (Refs.10,pp.3-12,4-4,figs.l-5,2-3; 17,p.2;20).
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Sample ID Sample Date
Mahaffy 177.6 ft 2/28/91
The Mahaffy sample is a groundwater sample ·collected from the wellhead tap
at the D. Mahaffy residence located at 197 "B" Goshen St., parcel 84.
Sample collected by USEPA Region IV Emergency Response and Removal Branch
and labeled Mahaffy, D. Res. This well was taken out of service and
converted to monitoring·well CW-2 {Refs.4,p.2;10,pp.3-12,4-4,figs.1-5,2-3;
16,p.22).
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so-HazardOUs Constituent Quantity
Sou·rc'e N,o: : 1
2.4.2. Hazardous Waste Quantity
2.4.2.1.1. Hazardous Constituent Quantity
No information on hazardous constituent quantity for the contaminated
groundwater plume was available.
2.4.2.1.2. Hazardous Wastestrearn Quantity
No information on hazardous wastestream quantity for the contaminated
groundwater plume was available.
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2.4.2.1.3. Volume
. SD-Volume
Source No.: 1
The contaminated groundwater pl~e extends north from Woodlawn Ave. to
the unnamed tributary to Fites Creek and east to approximately the Piedmont
Northern Railroad line (Ref.10,fig.4-9,p.4-19). Because the full extent of
the contaminated plume has not been determined, an.estimated volume for this
source was not calculated. Therefore; the vol~e of source No.l is unknown
but >0.
2.4.2.1.4. Area
Dimension of source (yd3 or gallons): unknown, >O
References(s): 1, sect. 2.4.2.2
Volume Assigned Value: unknown, >O
Total area has not been delineated for the contaminated plume (source type
Qoth~r~}.
2.4.2.1.5. Source Hazardous Waste Quantity Value
Source Hazardous Waste Quantity Value: unknown, >O
References(s): 1, table 2-6
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SITE SUMMARY OF SOURCE DESCRIPTIONS
Source
No.
1
Source Hazardous
Waste Quantity
Value
>O
note: NS= not Scored
Ground
Water
10
14
Containment
Surface
Water
NS
Gas
NS
SD-SW11Illary
Air
Particulate
NS
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3.0 GROUND WATER MIGRATION PATHWAY
3.0.l GENERAL CONSIDERATIONS
Aquifer/Stratum l (shallowest)
Aquifer/Stratum Name: Saprolite/Fractured Bedrock Aquifer
Description:
GW-General
The North Belmont PCE site is located in North Belmont, Gaston County,
·North Carolina (Refs. 3;18). The site and surrounding area, located in the
.rolling upland portion of the Piedmont Physiographic Province, is underlain
by metamorphosed intrusive rocks of the Charlotte Belt (Refs. 5, p.47; 6,
p.46). Geolog{cally, this area is characterized by a composite rock in which
diorite and granite appear as intermixed bodies occurring in a general north-
south belt along the easte.rn border of the county. This belt extends eastward
into Mecklenburg County where it is of greater prominence. South of Mt.
Holly, the amount of grani i:e appears to be subordinate to diorite (Ref. 5,
p.47).
The stratigraphy at the site is made up of 30 feet of surficial
sediments consisting of a red clay grading t9 a red clay loam overlying 60 to
80 feet of saprolite (weathered rock). Beneath the saprolite lies the
fractured bedrock (Refs 12, p.31; 13, p.19). Because of its larger porosity,
the saprolite functions as a reservoir for recharge to the fractured bedrock
below. The fractures serve as an intricate interconnected network of
pipelines that transmit water either to sPrings or streams or to wells (Ref.6,
p.46). Water level data collected during the 1996 Remedial Investigation
indicate that groundwater in both the saprolite and fractured bedrock portions
of the aquifer tends to ·flow north/northeast(Ref.10, figs.3-8,3-9) .. Subsurface
geologic cross-sections ·at the site indicate that a confining layer is not
present between the saprolite and the fractured bedrock (Ref.10, figs.3-4,3-
5,3-6). Because the. hydraulic conductivity of the two ·segments of this
aquifer differs by less than two orders of magnitude, and there is not a
confining layer present between the saprolite and the fractured bedrock, the
saprolite/bedrock aquifer is considered to be the single aquifer which
underlies the site (Ref.19,section 7.1). The geometric mean of the hydraulic
conductivity values collected from 8 saprolite zone monitor wells at the site
was 0. 98 ft/day. The geometric mean of the hydraulic conductivity values
collected from 9 fractured bedrock zone monitor wells at the site was 0.90
ft/day (Ref. 10, pp.5-10, 5-11).
To date, there have been twenty-two {22) permanent monitoring wells
installed at the site. One bedrock well and four shallow wells were installed
during the 1991 Preliminary Hydrogeological Investigation conducted by Roy F.
Weston for U.S. EPA/ERT (Ref. ·10, p.1-51. During the 1996 Remediai
Investigation, eight top of bedrock and nine· bedrock monitoring wells were
installed at the site (Ref. 10, p.2-121. In addition, nine of the original
sixteen residential wells which were converted to monitoring wells in·1991
were modified to have concrete pads and locking well covers; the other seven
wells were no longer accessible due to vandalism. Monitoring well depths
ranged from 41 feet below land surface (bls) to 181 feet bls while depth to
groundwater ranged from 2.65 feet below top of casing (btoc) to 34.58 feet
btoc (Ref.10, 2-12,2-14,3-12,4-21,
figs.1-5,2-3,4-121.
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Fifty-five (55) drinking water samples were collected from residences
located in the neighborhood north of Woodlawn Ave. and west of Cason Street
during the 1996 Remedial Investigation: Site specific contaminant levels
exceeded either Primary Maximum Contaminant Levels (MCL)/Maxirnum Contaminant
Level Goals (MCLG) or State of North Carolina Groundwater Standards in
fourteen (14) samples (Ref.10,pp.2-11,4-21).
Twenty-two (22) community wells, having a total population of· 3498
groundwater users, were identified within a 4-mile radius of the site
However, none of these· .wells were sampled during the 1996 Remedial
Investigation. There are no publicly owned municipal groundwater supply wells
located within the site target distance limit (Refs.7; 8).
3.1 LJ:l'.ELJ:HOOD OP' RELEASE
3.1.1· OBSERVED RBLBASB
Aquifer Being Evaluated: Saprolite/Fractured Bedrock
Chemical Analysis:
Background Concentration
Sample ID Depth Date
MW-3 150 ft 6/11/91
GW-Observed Release
Reference
The MW-3 sample is a groundwater sample collected from monitoring well ~3
located behind the Roper Shopping Center. Sample collected by USEPA
Environmental Response Team and labeled MW-3(Refs.10,pp.3-12,4-4,fig.2-3;
12,pp.8,24)
Sample ID
MW-3
Note:
·Hazardous
Sample
Quantitation
Substance Concentration Limit Reference
PCE 8.70 ug/1
TCE ND
cis-l,2DCE 3.50 J ug/1
PCE = tetrachloroethylene
TCE = trichloroethylene
5.0 ug/1
5.0 ug/1
5.0 ug/1
cis-l,2DCE = cis-1,2 dichloroethene
ND= not detected
12,p.24
12,p.24
12,p.24
J; Below Method Detection Limit(Estimated Concentration)
16
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Contaminated Samples
Sample ID Depth
Hughes 184 ft
N.Belmont School 148 ft
Mahaffy 177.6 ft
Date
2/27/91
2/25/91
2/28/91
Reference
10,pp.3-12,4-4,
figs.1-5,2-3; 17,p.4
10,pp.3-12,4-4,
figs.1-5,2-3;17,p.2
4,p.2;10,pp.3-12,4-4,
figs.1-5,2-3;16,p.22
The above samples were chosen because they were collected from residenti~l
wells that were taken out of service in 1991 due to the presence of site
specific contaminants at concentrations in excess of background levels and
in most cases exceeding health based benchmarks(Refs. 4, p.4; 10, p.4-4).
The depth of these wells indicate that they all draw water from the
fractured bedrock zone of the fractured bedrock/saprolite aquifer based on
the local hydrogeologic conditions (Ref. 1.2, p. 31) . The location of these
wells is presented on.Figure 3 of this HRS Documentation Record.
Hazardous
Sample ID Substance
Hughes PCE
TCE
cis-1,2
N. Belmont School PCE
TCE
DCE
cis-1, 2 DCE
Mahaffy PCE
Concentration
15000 ug/1
194.0 ug/1
664.0 ug/1
1432.2 ug/1
48.5 ug/1
113.5 ug/1
4100.0 AJ ug/1
Note: A= Average Value (Ref. 16, p.22)
J Estimated Value (Ref. 16, p.22)
17
Sample
Quantitation
Limit
1. 0 ug/1
1.0 ug/1
1.0, ug/1
5.0 ug/1
5.0 ug/1
5.0 ug/1
1200.0 ug/1
Reference
17, p.6;20
17, p.3;20
16,p.22;20
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Level I Samples
Hazardous Hazardous Subs. Benchmark
·sample ID: Substance Concentration Concentration
Hughes PCE 15000 ug/1 5, 370,
TCE 194.0 ug/1 5, 7.7
cis-1,2DCE 664.0 ug/1 70, 370
N. Bel. Sch. PCE 1432.2 ug/1 5, 370,
TCE 48.5 ug/1 5, 7.7
cis-1,2DCE 113.5 ug/1 70, 370
Mahaffy PCE 4100 AJ ug/1 5, 370,
Reference for Benchmarks: 2, pp.B-29,B.~39,B-40
Note: PCE = tetrachloroethylene
TCE = trichloroethylene
c·is-1, 2DCE = cis-1, 2 dichloroethene
A= Average Value (Ref. 16, p.22)
J = Estimated Value (Ref. 16, p.22)
Attribution:
1. 6
1. 6
1. 6
ug/1 Benchmark
MCL, RDSC, CRSC
MCL, CRSC
MCL, RDSC
MCL, RDSC, CRSC
MCL, CRSC
MCL, RDSC
MCL, RDSC, CRSC
The source at this site is the contaminated saprolite/fractured bedrock
groundwater plume, and these private wells have been impacted with elevated
concentrations of ·PcE, TCE, and cis-1, 2DCE. All concentrations were
detected above background levels (Ref. 10, p.4-4).
Hazardous Substances Released
PCE (tetrachloroethylene)
TCE (trichloroethylene)
cis-l,2DCE (cis-1,2 dichloroethene)
Ground Water Observed Release Factor Value: 550
18
.-.·~,_;. .. ,., ... .:
,.•, . . _;~~l
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GW-Containrnent
3.1.2 POTENTIAL TO RBLBASB
The criteria Constituting an observed release by chemical ·analysis have
been met. Therefore, the pot~ntial to release component of this pathway was
not scored.
19
:. ~ .... ::;?-: .. ,., ...
;~ '• .
-~:~•
:_-.';§:·~
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GW-Tox.icity/Mobility
3.2 WASTE CHARACTERISTICS
3.2.1 Toxicity/Mobility
Hazardous Source Toxicity Mobility Toxicity/
Substance No. Factor Value Factor Value Mobility Ref.
PCE 1 100 1 100 2, p.B-18
· TCE 1 10 1 10 2, p.B-19
·cis-1, 2DCE 1 100 1 100 2, p.B-8
Reference: 1, Sect. 3.2.1, pp.51601,51602
-=-=--=---===--=-=-=---=------------------=---=--------=-====-=----------=
Toxicity/Mobility Factor Value: 100
20
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GW~Hazardous waste Quantity
3.2.2 Hazardous Waste Quantity
Source Hazardous
Waste Quantity
Source Number Value (Section 2.4.2.1.5)
Is source hazardous
constit-uent quantity
data complete? (yes/no)
1 >O no
Sum of Values: >O
3.2.3 Waste Characteristics Factor Category Value
Hazardous Waste Quantity Factor Value (Ref .1, Table 2-6) ·, 100
Toxicity/Mobility Factor Value: 100
Toxicity/Mobility Factor Value X Hazardous
Waste Quantity Factor Value: 10,000
Waste Characteristics Product of 10000 yields a Waste Characteristics
Factor Category Value of 10 (Ref.l, Table 2-7).
-------==-------------====-------------=----==-=---=---====-----=---------
Hazardous Waste Quantity Factor Value: 10,000
Waste Characteristics Factor Category Value: 10
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GW-Targets
3.3 TARGETS
The background well (monitoring well MW-3) is located behind the Roper
Shopping Center near the northeast property corner and has a depth of 150
feet(Ref. 12,p.8). The three (3) target wells used in the HRS scoring
scenario (Hughes, N.Belmont School, and Mahaffy) were taken out of service
in 199·1 (Ref. 4,p.4). The Hughes well at 109 Goshen St. served 2 people,
was converted to monitoring well CW-3, and is 184 feet deep (Refs. 10,
fig.1-5,pp.3-12,4-4; 14, p.3). The North Belmont Elementary School well
located at 113 School St. served 596 children, was converted to monitoring
well CW-4, and is 148 feet deep (Refs. 10, fig.l-5,pp.3-12,4-4;· 14, p.2).
The Mahaffy well located at 197 Goshen St. served 2 people, was converted
to monitoring well CW-2, and is 177.6 feet deep (Refs. 10, fig.1-5,pp.3-
12,4-4; 14, p.3). These wells are all located in the neighborhood
northeast of the North Belmont Elementary School and are therefore
considered to be on-site (Fig. 3 of documentation record).
Level I Level II Potential
Distance Contarn. Contarn. Contarn.
Well From Source Ag1:,ifer (Y/N) (Y/N) (Y/N) Ref.
Hughes 0.0 mi. FBR y n n 10, p.4-4
N.Belrnont Sch. 0.0 mi. FBR y n n 10, p.4-4
Mahaffy
55 *
770 **
398 **
2714 **
1687 **
. 2741 **
Note:
0.0 mi. FBR y n n 10, p.4-4
0-.25 mi. FBR n n y 10,p.2-11
. 25-.50 mi . FBR n n y 7;
.50-1 mi. FBR n n y 7.
1-2 mi. FBR n n y 7;
203 mi. FBR n n y 7 •'
3-4 mi. FBR n n y 7;
FBR = Fractured Bedrock
* Number of wells sampled during the 1996 Remedial Investigation
** Groundwater Population calculated by adding the product of topo
·map house count multiplied by county residents per household
average, and the total community well population per distance
r~ng
22
8
8
8
8
8
------~~\---------~~------1--..,.<:-:U ~--J---, SUPPLY
,/
CHIEJARY
"'
.l
.,,z
-'~ -'
4H Gl
"
82 LOT 1-IUI.IBERS
• PREVIOUS DllY CLEJ\NlNG f/\CIUll[S ~ PREVIOUS nErnrccrtATOn R[P,\1/l F.-.Cll!IY
n l.lll.ClnM[ SIIOP
SCALE
0 250 500 L. re ,,,
IN FEET >
INCi! = 500 FEET
Fig. No: 3
North Carolina Division of
Waste Management
" "
Title: RI/FS Study Area and Level I Sample Locations
Source: Remedial Investigation Report, North Belmont PCE Superfund Site
US EPA Region IV Hazardous Waste Section, June l997
i
f
S~perfund Section Scale: l" = soo ft· Date: lZ/4/97 Modified By: G.D. Runford
Site Name: North Belrront PCE Site NCD 986 l87 128
----- --- - - - - --- --
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"GW-Nearest Well
3.3.1 Nearest Well
Well: Hughes
Level of Contamination (I, II, or potential) : I
Well: North Belmont School
Level of ContaminS.tion (I, II, or potential) : I
Well: Mahaffy
Level of Con~amination (I, II, or potential) : I
There are three Level I drinking water wells located on the site, the
resulting nearest well factor value is 50 (Refs. 1, Sect. 3.3.1, p.51603;
10, p.4-4, fig.1-5).
Nearest Well Factor Value: 50
24
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3.3.2 Population
3.3.2.1 Level of Contamination
3.3.2.2 Level I Concentrations
Level I Well
Hughes
N.Belrnont School
Mahaffy
Population
2
596
2
GW-Level I Concentrations
Reference
14,p.3
14,p.2
14,p.3
The groundwater population for Level I wells was as of the time the wells
were taken out of service due to ground water contamination (4, p.4; 14).
==========================================================================
Population Served by
Level I Wells: 600 Level I Concentrations Factor Value: 6000
25
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·GW-Level II Concentrations
3.3.2.3 Level II Concentrations
Level II Well Population Reference
No Level II contamination of drinking water wells was· observed (Ref. 10,
p.4-21).
Level I I Concentrations. Factor Value: 0
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GW-Potential Contaffiination
3.3.2.4 Potential Contamination
Distance Distance-Weighted
Category Population Reference Population Value
0-.25 mi. 145 10,2-11 164
.25-.50 mi. 770 7;8 324
. 50-l mi. 398 7;8 167
1-2 mi. 2714 7;8 294
2-3 mi. 1687 7;8 212
3_-4 mi. 2741 7;8 131
Note: Population within the 0-.25 mi. distance category is the product
of the nwnber of potential contamination drinking water wells
identified during the Remedial Investigation (55) and the Gaston
County average persons per household (2.64). The remaining distance
category populations were calculated by topographic map house count with
the county average persons per ho~sehold for areas not serviced by
municipal supplies, and the community well populations per distance
ring (Refs.1, p.51603, sect. 3.3.2; 7; 8; 10,p.2-11).
Sum of Distance-Weighted Population Values: 1292
Potential Contamination Factor-Value: 129
.27
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GW-Resources
3.3.3 RESOURCES
No resource-use of groundwater within the site target distance limit is
assumed based on the extent of surface water supplied municipal water
service (Ref. 1, p. 51604, sect. 3.3.3; 15, p.9).
-=----==---------=------=====-=-=--=--------~--------------=-=---=--------
Resources Factor Value: D
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GW-Wellhead Protection Area
3.3.4 WELLHEAD PROTECTXON AREA
There are currently no wellhead protection area programs in.place in North
Carolina (Ref.9).
Wellhead Protection Area Factor Value: 0
29
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AVA
MCDENR
JAMES B. HUNT JR.
GoVERNOR
WAYNE MCDEVITT
SECRETARY
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
MAR 3 0 1996
Ms. Carol M. Browner, Administrator
U.S. Environmental Protection Agency
401 M Street, SW
Washington, DC 20460
Subject: Proposal for NPL Listing ·
North Belmont PCE Site
North Belmont, Gaston County, :\C
NCO 986 187 128
Dear Ms. Browner:
The US Environmental Protection Agency. Region IV has solicited North
Carolina's position on proposing the North Belmont PCE Site for listing on the
National Priorities List (NPL). Continued response action is needed at the site due
to contamination ofgroundwater and private drinking water supply wells with
chlorinated solvents. Therefore. if the EPA proposes this site for listing on the
NPL, North Carolina would support such an action. We appreciate the EPA's
requesting our input on such sites and look forward to continuing our working
partnership with Region IV on CERCLA issues.
Wayne McDevitt
Secretary
WMcD:WLM
cc: Bill Holman, NCDl;:NR
William L. Meyer, NCDENR, DWM
Jack Butler, NCDENR, DWM
Richard Gre~n, US EPA, Re 0 ion IV
Cynthia Gurley, US EPA, Region IV
Phil Vorsatz, US EPA, Region IV
...:~1_~.;.;:
<.j<·"
P.O. Box 27687. RALEIGH NC 27611-7687' 512 NORTH 5AL1S8UR"I' STREET". RALEIGH NC 27f;Q.I
PH0..,,E9'"1-"'.':_\_"l .1'18.\ ra!oX9l<'--,15-10•30 WWW.EH-.R STA.-E •.· '-~•
11
•• ••
II
••
•• 11
•• •• Ii
I r u
·~ ••
''• I
~
·,.;-~:·•,;;:;·..;
_:!'"=""' ·-·
· ..• ~. :
••."! .• '.··
~-.
.. : .. \~':
..; .-
Part· 11
Environmental.--
Protection Agency
40 CFR Part 3D0
Hazard R,m_king System; Final Rule
1.
.. --·---
1 .':\
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Ref. 2
····-------... --··-...
······-··--··· ..... -·
SUPERFUND CHEMICAL DATA MATRIX
. APPENDIX B TABLES ·.
June 1996
. '
11.
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Appendix B
Hazardous Substance Factor Values
(329 Substances) ··
Hazardous Substance Benchmarks
(329 Substances)
Hazardous Substance Benchmarks
(6 Radionuclides)
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REF.3
~ LATITUDE ANii· LOIIG.rrtJDE c°I,LCULATION WORKSJfEET ·1r· -LI USING ENGINEER'S SCALE (1/60)
AJ<.A: _______________ c_ ______ SSID: ___________ _
STATE: N l ZIP CODE: ________ _
SIT" REFERENCE.POINT·. 1,'r-,,,.·.•.'-/ o· .. c ,, . •. V. /I -/ '. _ "-' ,._ -:,,·fv'•t? ',~ 1.>.,•. ~iri-:; ·
TOWNSHIP: N/S RANGE: E/W
SCALE: 1:24,000 MAP DATE: 1 q 7 C SECTION: __ 1/4 __ 1/4 __ 1/4
l'.AP DATUM: er:~ 1983 (CIRCLE ONE) H.ERIDIAN: _______________ _
COORDINATES FROM LOWER RIGHT (SOUTHEAST) CORNER OF 7.5' MAP (attach photocopy):
LONGITUDE: SloOO• o·• LATITUDE: :;5o i·s,...E._•
COORDINATES FROM LOWER RIGHT (SOUTHEAST) CORNER OF 2.5' GRID CELL:
LONGITUDE: '2, i o "1.-' 3C •
CALCULATIONS: LATITUDE (7.5' QUADRANGLE MAP)
A) NUMBER OF RULER GRADUATIONS FROM LATITUDE GRID LINE TO SITE REF POINT: 2 $(;,
B) MULTIPLY (A) BY 0.3304 TO CONVERT TO SECONDS:
Ax 0.3304
C) EXPRESS IN MINUTES AND SECONDS (l'= 60"): _f_, '1.'"f. 5t>"
D) l'.DD TO STARTING LATITUDE: :,')o i.J '..!}__ . .!::__• + _i_• 7':{._$_ = l SITE LATITUDE: '".22_0....!Jz..' .3!f... . ...2,_·
CALCULATIONS: LONGITUDE ( 7. 5' QUADRANGLE MAP)·
A) NUMBER OF RULER GRADUATIONS FROM .RIGHT LONGITUDE LINE TO SITE RE:' POINT: j O $"
B) MULTIPLY (A) BY 0.3304 TO CONVERT TO SECONDS:
Ax 0.3304 = :>~ ._]__•
C) EXPRESS :CN MINUTES AND SECONDS (l'= 60"): ,... 7. V -, \.,/'-•I fn ------
D) .'.DD TO STARTING LONGITUDE: ;.: t O 7 , ~:: 2 " + _v _ _:::_ _,_. __ ..... ""Y. -:: V ... • "' ------=
SITE LOUGITUDE:
.I.NV::STIGATOR: G -e,_· ~ V.l'-i.{,:, ~ d DATE: -------------------
E-10
(
-----·····-·------
I
SITE NAHE: Nocth Belmont PCE Site JlUP.BE?.: NCD 986 187 128
----······•·············----
TOPOGRAPHIC MAP QUADRANGLE NAME: Mount Holly' Nocth Cacolina
COOR.DINA TES OF LO\\'ER RJGiiT-HAJ-;D CORNER OF 2.5-MINUTE GRJD:
U.T!TUDE: 35 o 16 ·24.5 LONGITUDE: 81 .o 03 · 04,5
E-11
REF.4
' UNITED STATES ENVJRC~JMENTAL PROTECTION AGENCY
RSGION IV
345 COURTLAND STREET. N.E.
ATLANTA. GEORGIA 30365
--I
ACTION MEMORANDUM YELLOW
DATE: APR 1 ti 19~1
SUBJECT: Removal Authorization for North Belmont PCE Site in Belmont, Gaston County, North Carolina
FROM: R. Donald Rigger, Jr. On-Scene Coordinator
TO: File
I. ISSUE
This memorandum is for authori2:"atibri to proceed with a removal action for $48,650 at'the ·North Belmont PCE Site located in North Belmont, North Carolina. The drinking water supply wells for several residences _have been contaminated with tetrachloroethylene (PCE)" •. · The level of. contamination in these wells is very high'and immediate prevision of an alternate source of potable water is necessary.
II. BACKGROUND
A. Site Description
1. Physical Location
The site is a .residential neighborhood in the conmmnity of North Belmont. The affected area is bounded by Magnolia Street on the north, Acme Road on the east, School Street on the south, and Woodlawn Avenue on the west. ·
2. General Character of the Site
The site consists of approximately 27 single family dwellings, a church, and an elementary school. The area around the site is a mixed-use area with commercial, residential, and industrial development within a one mile radius.
·.:: : .. ·-
;•;~::..ci .....
'
-2-
The site lies in the Piedmont physiographic province. ,.
Piedmont geology co=only consists of an assorted
complex of igneous and metamorphic rocks overlain by
partially weathered rock (saprolite) which grades to
surficial soil. The saprolite is often saturated,
forming the surficial aquifer. The less permeable
bedrock may also be saturated with groundwater
occupying secondary openings such as joints and
fractures. Typically the surficial (saprolite) ·and
bedrock aquifer behave as one hydrologic unit.
3. NPL Status
The site is not on the NPL, however it is in the
preremedial database. A Preliminary Assessment will
be performed and, if deemed necessary, the site will
be sampled and scored for the NPL,
B. Incident/Release Characteristics
In February of 1991 the Gaston County Health Department
sampled the water well that provided water to the North
Belmont Elementary School and two single family
dwellings. This sampling was associated with an effort by
the county to evaluate community water supplies for
volatile organic compound (VOC) contamination. The
results of this sample indicated serious VOC contamination
in the well water. The EPA Region IV Emergency Response
and Removal Branch (ERRB) was notified of this situation
on February 28, 1991. On the following day ERRB responded
to the site for the purpose of collecting additional
potable water samples. Approximately 25 drinking water
samples were collected by ERRB and Gaston County. Fifteen
of these samples were analyzed at the EPA laboratory in
Athens, Georgia and the remainder were analyzed at the
North Carolina laboratory in Cary, North Carolina. PCE
and/or its breakdown products trichloroethylene (TCE) and
cis-1,2 dichloroethylene (DCE) were detected in fifteen
samples. PCE concentrations ranged as high as 15,000
micrograms per liter (ug/1).
•
-3-
C. Quantities and Types of Substances Present
The following table sU111Inarizes the contaminant concentrations (in ug/1) in the five most h~ghly contaminated wells:
. RESIDENT PCE TCE DCE
Hughes 15,000 194 664 Mahaffey 4,500 180 560 Elementary school 1,093 59 120 Kunzman 91 16 88
The school well also supplied water to the Wallace Siler residences.
D. Previous Actions to Abate Threat
and
The Gaston county Health Department took immediate steps to protect the school children by connecting the school to the City of Belmont water system. This action was funded ~y the City of Belmont. The city does not have a funding mechanism available to provide relief for the individual residents.
III. THREAT TO THE PUBLIC HEALTH OR WELFARE OR THE ENVIRONMENT
A. Threats to the Public Health or Welfare
This site poses a threat to the public health because the potable water supply to several residences has been contaminated. The removal program guidance for _contaminated drinking water sites (OSWER Directive 9360.1-10) states that the removal action level for PCE is 66 ug/1. Provision of alternate water supplies is warranted whenever this removal action level is exceeded, as is the case for five residences. Ingestion and inhalation pathways must be evaluated when potable water supplies are contaminated with volatile organic compounds (VOC's). Concentrations as high as those at this site pose a threat to human health through both the ingestion and inhalation pathways. Therefore, an alternate source of all household water, not just bottled water for drinking and cooking, must be provided.
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B. Threats to the Environment
Groundwater in the area of the site is discharged at the land surface in seeps and springs which feed surface water bodies. The contaminants now present in the groundwater would pose a threat to surface water quality.
IV. ENFORCEMENT
See Attachment 1.
V. PROPOSED ACTIONS AND COSTS
A. Proposed Actions
Emergency measures were required in order to protect the welfare of the affected residents. These measures were taken under the On-Scene Coordinator's emergency authority. Toxicologists with the State of North Carolina and the Agency for Toxic Substances and Disease Registry advised that the contaminant concentrations, given that the contaminants are VOC's, were so high that all use of the water should be immediately discontinued. Therefore; the wells were disconnected and temporary water tanks were connected to the household plumbing at the Wallace, Siler, Hughes, and Mahaffey residences. The inhalation pathway was not considered a threat at the Kunzman residence, so bottled water was provided. These temporary water supplies will continue to be replenished until a-permanent solution can be implemented.
A permanent water supply remedy and any source remediation will be addressed in a ceiling increase request because costs and scope of these actions will exceed the OSC's emergency authority.
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VI.
B. Estimated Costs
Extramural Costs
Regional Allowance Costs:
ERCS
-5-
Non-Regional Allowance Costs:
TAT
Subtotal
15% Contingency
Total, Extramural Cost
Intramural Costs
Direct (100 hrs at $30/hr)
Indirect (100 hrs at $54/hr)
Total, Intramural Cost
TOTAL SITE BUDGET
REGIONAL DETERMINATION
$25,000
10,000
35,000
5,250
3,000
5,400
'$40,250
8,400
$48,650
.................. ,
Because conditions at the North Belmont PCE Site meet the NCP 40 C.F.R. § 300.415 criteria for a removal action, I, as an On-Scene Coordinator, authorize expenditures not to exceed $48,650 through procurement authority delegated to me under Authority Number 87-26-A008-B002.
f]j'Ji:, 11 [t;.;=
R. Donald Rigger :• '/ On-Scene Coordinator . Emergency Response and Removal Branch
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ATTACHMENT 1
ENFORCEMENT SENSITIVE
The source of the groundwater contamination is unknown at this time. Due to the exigencies of the situation, a response could not be delayed while the source was being located. A site investigation will be conducted in an attempt to locate the source of the contamination. Should PRP's be identified, enforcement efforts will ensue. •
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REF.S
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NORTH CAROLINA
DEPARTMENT OF CONSERVATION AND DEVELOPMENT ... . .. . . ' ;: .:.);> . . I .,: .-: >. .,.·:,;;:;.t:.:·,.. --'--'---'-"---.' ·. i".•
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· .: DIVISIOt{ OF Ml NERA.L! RESOURCES ... ·-_; ·::,-:. ,-rt ~ .. ·.:~t~/-'. .. _. -.:
· JASPER. L. STUCKEY, STATE GEOLOGIST . . , . , ... ,.. . . ,,, .
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-.-.
BY
.· H. E. LEGRAND AND M. J. MUN DORFF
GEOLOGISTS, U. S. GEOLOGICAL SURVEY
••
PREPARED COOPERATIVELY BY THE GEOLOGICAL SURVEY,
UNITED STATES DEPARTMENT OF THE INTERIOR
•
1952
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GEOLOGY ANIJ GltOUND WATE!t IN THE CHARLOTTE AREA,. NO!lT!l CAROLINA 47
GASTON COUNTY
(Area, 35S square miles; population in 195.0, 110,S3G)
Geography mul J>hysiography.-Gaston County lies in the south-central part of the Charlotte area. Gastonia, with a population of 23,003, is the largest municipality and the county seat. Textile manufac-turing is the largest iI;dustry in the county although there is considerable farming activity. The countyis· well served by railroads and paved roads. · Gaston County is a rolling upland portion of the Pied111ont province, the general altitude being slight-ly more than 800 feet. Some of the streams· have incised their valleys as much as ·200 feet below the up-land, and as a result the topography near the streams is quite hilly. Rising several hundred feet above the ·general level of the country are several pronounced northeast trending ridges, all of which are composed of resistant quartzite. Prominent among these are Kings Mountain Pinnacle, Crowders Mountain, and Spencer Mountain.
The county is drained by Catawba River, which flows south along the east boundary. The main tribu-tarie,j of the Catawba flow· southeastwar.d across the general trend ~f the rocks and for the most part are · not n·oticeably influenced by any differential resistance of rocks to erosion. The tributaries are closely spaced, resulting in a fine-textured drainage pattern and the absence of extensive, flat interstream areas. With the ::exception of South Fo.rk Catawba River, the streams have fairly short steep courses, and conse-quently are rather swift.
Geology.-Numerous types of rocks occur in Gaston County (fig. 13)-, and their relations one with an-other are complex. T_he general northeast schistose structur.e prevails so that rocks of eastern Cleveland County extend northeastward into the western part of Gaston. Mica schist forms the dominant host rock into which the granite was injected in Gaston County. Nat-urally enough, the granite did not intrude the schist evenly and in a few areas granite is either scant or ab-sen·t in the schist. The belt of schist 2 miles east of Gastonia and parts of the schist near Kings Mountain Pinnacle and Crowders Mountain contain very little granite. Muscovite or sericite, and quartz are generally the chief components of the schist although manganese and chlorite are not uncommon. Composite rocks in which mica schist and granite are interlayered, generally in northeast trending belts, are widespread in the western two-thirds of the county. The largest belt in which the schist is pre-dominant surrounds Kings Mountain Pinnacle and extends through the western side of Bessemer City to High Shoals in the northern part of the county. The schist is subordinate in quantity to the granite in· the area between Dallas and Stanley and aiong the Cleveland County line southeast of Cherryville. Several masses or belts of homogeneous or nearly homogeneous granite occur in ·Gaston County. The largest of these extends northward from the basin of South Crowders Creek at the South Car.olina line, through Gastonia to Lincoln County east of High Shoals. One finger of this mass extends southwestward to Bessemer City where it is the type locality for Keith's Bessemer granite.°' Another large mass of gran-ite occurs southeast of Cherryville.
The granites are not uniform in appearance and mineral constituents. The granite at Bessemer City is locally more gneissic and contains more biotite than most of the granite in the county. The granites for the most part have a light color and medium texture, although small bodies within the complex proper are coarse textured and may be called pegmatite.
Gneisses and schists, containing hornblende as a prominent dark mineral, are common in Gaston Coun-ty. In addition to the numerous lenses of hornblendic rocks interlayered with other countr,-rocks, several large areas of hornblende gneiss occur. One o{these, in the vicinity of Beaverdam Creek in the northwest-ern part of the county, has been studied in some detail." Soils derived from the hornblende gneiss are gen-erally dark brown or red in color and are more fertile than those from other rocks. A composite rock in which diorite and granite appear as intermixed bodies occurs in a general north-south belt along the eastern border of the county. This belt extends eastward into Mecklenburg County
~Keith, Arthur, op. cit., p, 4. :.Kesler, T. L., Correlation of some metamorphic rocks in the central Carolina Piedmont: Geol. Soc. of America Bull., vol. 55,
p. 773, 1944. .
--
figure 13
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EXPLANATION
Mica schist
Mica schrsl and granite s~h!1I predominant
Granite and mica schist ar1nile predomin1nl
Granite
Diorile and granite
dlorite predomlninl
Granite and diorile r<1nil~ prtdomlnint
Hornblende gnelu and granite · _lnltrllin ·
Hornblende gneiss
Gabbro-diorile
ind 11Utd buie roeh
Q,.iartzite
·umeslone ·
---
GEOLOGIC MAP
OF
GASTON COUNTY
SCA LE
MILES
0 •
FIGURE 13.-GEOLOGIC MAP OF GASTON COUNTY,
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GEOLOGY AND GROUND WATER IN THE CHARLOTTE AREA, NORTH CAROLINA
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49 where it is of greater prominence. The rocks of the complex are not well exposed, and as a consequence
their relation with adjacent rocks to the west is not certain. In this connection, a zone of diorite and diorite
gneiss extending northeastward through Lowell is adjacent to the complex and may be genetically re\ate·d
to it. South of Mt. Holly the amount of granite appears to be subordinate to diorite but northward the dio:
rite is subordinate in amount. Pronounced granular disintegration is characteristic of both components cii · the complex in the Charlotte area.
· · . ·. , .. ,. ·several northeast-tre~ding belts of quartzite occur in the central part ·of Gaston County. The ridgeii.
that they form by their resistance to erosion serve to show the broad structural tre11c!s of the rocks. In the .
area south of Crowders Mountain, Keith"' has noted three divisions o(the quartzite, namely. kya:nite quartz__
ite, white, nearly pure quartzite, chloritic quartzite, and seritic quartzite.· The beds of quartzite are con-
sidered to be of the same general age, bu_t the relation of one with another is not clear . Ground Water.-Most of the domestic water supplies, many of the industrial supplies, and two of the
municipal supplies in Gaston County are obtained from wells (fig.• 14). Most of the water in rural sec-
tions comes from dug wells that derive water from the weathered and disintegrated zone· between the soil
and 'the underlying unweathered rock.· Where the unweathered rock lies near the surface difficulty. may
arise in digging a well deep enough to obtain a dependable well. The failure of dug wells is· not confined
to any one rock type although attempts to dig wells on upland areas underlain by quartzite are likely to
be unsuccessful.
· · Records of more than 200 drilled wells are included in the table of well data. The records of 151 wells
were complete enough for use in compiling table 11 b_elow.
TABLE 11.-SUUMARY OF DATA ON WELLS IN GASTON COUNTY (Drilled wells 3 inches or more in diameter)
Tnz or Rocr
Schist ............ ···-·-··-··-··-·-
Granite ... --.•-··-·· ...............
All 1Vells ........ ·--····-· ........
TorOGR.\1'11lC [.OCJ.TION
Hill ....................... -··· ... .
Flat .............................. .
Slope ............................. .
Dra,r ............................. .
r,Uey ............................ .
9-i:eith, Arthur, op. cit., (folio 222) p. 5.
ACCORDING TO ROCK TYPE
Yield (gallons ~ minute} Number of Average
well, depth
I (feet)
Range Average Per foot
of well
" 180 0-150 23 .13
" 165 0--100 18 .11
151 1;2 0--150 21 .12
ACCORDING TO TOPOGRAPHIC LOCATION
Number of
,rdl.s
53
Aver:icc
depth
(ftet)
153
1'3
1,1
179
H3 I
Yield (gallons a rninute)
Raeg, I A ,mg,
0--" 11
S-~O 18
1-150 25
2-Itr. " 0-25 · 15
Per foot
of well
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. 13
. 13
. 1,
.10
Perceut or welh
yielding l gallon
a minute or
Jess •.
4
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'
Percent of wells
yieldint l gallon
a minutl' or
ks.s.
0
0
"
,_ REF. 6
•~round-Water Regions
of the United States I
z~,IJ\1~11,iif ~;iJl!i~li,t!11~:it1!Z!!1 1.. .,~~~t~~~!li~~~ll'\~';t'i I ,~~~ji7~ ~i~*1·:'~i~{~f~iJ:,,t~11~~;;g~J!t$~tt:J?~if~~f{, ;k~, ~?ftttf 11-..&•..:~I*-• ";.f; ~~~~·•,c!Ol/1~,;o:-.,"".x;~~~--•,~.,('~~-\~•~•~•/;.;:~~l~J~_..t,~7,~~,,S~:_., •~ ..,•~~ ~1~:5:l-· ""'· ~<~'>;;•1-;---(,1 .. '('; -.;.,. ~,-,;,t;,:,;'.,:f,t;;;,i,'1f ,.;';'' --~,.,... ·-•~"';it .. ~c•,·,• ,;:/ l<iZ•Y'-·,n 5,i\:~: · -~• . · · ~~J,,;;W.:'l,~!~::;,i-ct.;i'-?:rl,:,;-J,iurJ :::,:~;,,._t,,Hi-~-"'~-r; --~i':'<#$,'ti' '~""~~ --. ' ~ .• ',a,--,;;,_(')"-·<•,,·,,,,,~, :-.,.,,,cW~,; "''-,,.··-:a;·;,-.;;,~,-;iJ:~,--.;,•,n~:._,is,,,..,.,:c, ~~~--:i·{!~~.l~· ~ -~~·-i¼)..~:tf=:1l::.~¥i'~f.~;f~~·r~lt~~.-:~--.;i'1\:;~) ;~3.~-~~1~~:j;~¾'-'~:1~~t\F.f!1:· ""'·--~ .. ,,~,.., . --·;, .... "•'' ,,,, ... ,,. , .• ,.,..,,c. •;or~ ·-.,---.-.,.-..... _,,,a-.. : .. , .... , ... ,,....;•,, .. · _, -~.c· -1-r•~SC~ •, ••••"{•,< OS ,, '"''"'"'•••o,..,, ,_,,,.,,.,,<' '• "''•"'• •• .,,,,,," "'"""",,~••>;'fk¼'i;°"''"'"''•·,• d~ ;;z: •• J11'8fC~:,~fWl-.. '· ~11 I w~~tr :;:t.iffe.:3J".~"'2~'.¼~~~;t~~f );=~~;t~:{~{i.~'1ii· ~t,~':.:t~~~ "i'!*-, "-,.:,;,:,,:,, .. ~~"-'-~-1'~.,,fic,ts::!,'.,.;;,.,~,;:-, "'~~,i'-,;,ii,,,-., · .. -.,, ,_,,,_,;v;;;-.,.,~ ,_,.,,, '% :.;,,:,~;,,-~SJ:,;;; . ~$:1;; ,j}!;;\'h,~..f-;;~ff.f~tf.;;s;f,\t·;,;f\:1_:;.'§}r,~z7,p;,',J:-~s;_~~~~~ .• 'c?l:~f~ C:.~°ffl·':;;,~ "Ji:;~ff;,-s••· ~ .... *~~{'/~.:,[!f.,~1£t':t-s~';~-,;;:;t~'.',l';~,,;~ 'i,,""!"!;:..","!:;i: II,,~~~--~~: ~~:~. .. .. ,T{~i~~~%,~t!~~~1ft~~--~i, .~]~
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United States
Geological
Survey
Water-Supply
Paper 2242
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reservoir for the bedrock.
The Glaciated Central region and the Northeast and Superior Uplands region :1rc simil,1r in th.it the u ncon:,;olidatcd material in both consists of glucial depos-its. H owcvcr, the bedrock in the I wo regions is d iff crent. The bedrock in the Glaciated Central region. as we have already seen. consists of consolidated sedimentary rocks that contain both steeply dipping fractures and fractures along bedding planes. In the Northeast and Superior
8. PIEDMONT BLUE RIDGE REGION
(Thie~ rego/ith over fractured crystalline and metamorphosed sedimentary rocks}
The Piedmont and Blue Ridge regi6n is an area of about 247,000 km' extending from Alabama on the south to Pennsylvania on the north. The Piedmont part of the region consists of low, rounded hills and long, rolling, northeast-southwest !randing ridges whose summits range from about a hundred meters above sea level along its eastern boundary with the Coastal Plain to 500 to 600 m along its boundary with the Blue Ridge area to the west. The Blue Ridge is mountainous and includes the highest peaks east of the Mississippi. The mountains, some of which reach altitudes of more than 2,000 m, · have smooth-rounded outlines and are bordered by well-graded streams flowing in relatively narrow valleys.
m
The Piedmont and Blue Ridge region is underlain by bedrock of Precambrian and Paleozoic age consisting of igneous and metamorphosed igneous and sedimentary rocks. These include granite, gneiss, schist, quartzite, slate, m~rble, and phyllite. The land surface io"the Pied-mont and Blue Ridge is underlain by clay-rich, unconsol-idated material derived from in situ weathering of the underlying bedrock. This material, which averages about IO to 20 min thickness and may be as much as I 00 m thick on some ridges, is referred to as saprolite. In many val-leys, especially those of larger streams, flood plains are. underlain by ihin, moderately well-sorted alluvium de-posited by the streams. When the distinction between saprolite and alluvium is not important, the term regolith is used to refer to the layer of unconsolidated deposits. The regolith contains water in pore spaces between rock particles. The bedrock, on the other hand, does not have any significant intergranular porosity. It contains water, instead, in sheetlike openings formed along frac-tures (that is, breaks in the otherwise "solid" rock) (fig .. 36). The hydraulic conductivities of the regolith and the bedrock are similar and range from about 0.001 to I m
46 Ground-Waler Regions of the United States
5 •• 1111111111
Uplands. on the other hand. the hedrock is compo:-.cd of int rusivc igneous and metamorphic rocks ( non bedded) in which most w:.1tcr-bcuring openings arc steeply-dipping· fractures. /\s a result of the differences in fractures. the ' bedrock in the Glaciated Central region is. in general, a f more productive and more important :-.ourcc of ground wuter than the bedrock in the Northeast and Superior Uplands region.
day-'. The major difference in their water-bearing char-acteristics is their porosities, that of regolith being about 20 to 30 percent and that of the bedrock about 0.01 to 2 percent (fig. 37). Small supplies of water adequate for domestic needs can be obtained from the regolith through large-diameter bored or dug wells. However, most wells, especially those where moderate supplies of water are needed, are relatively small in diameter and are cased through the regolith and finished with open holes in the bedrock. Although, as·noted, the hydraulic conductivity of the bedrock is similar to.that of the regolith, bedrock wells generally have much larger yields than regolith wells because, being deeper, they have a much larger available drawdown.
All ground-water systems function both as reser-voirs that store water and as pipelines (or conduits) that transmit water from recharge areas to discharge areas. The yield of bedrock wells in the Piedmont and Blue Ridge region depe.nds on the number and size of fractures penetrated by the open hole and on the replenishment of the fractures by seepage into them from the overlying regolith. Thus, the ground-water system in this region can be viewed, from the standpoint of ground-water development, as a terrane in which the reservoir and pipeline functions are effectively separated. Because of its larger porosity, the regolith functions as a reservoir which slowly feeds water downward into the fractures in
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To: File
From: G.Doug Rumfor~
Date: 6/25/93
REF. 7
Memorandum
Subject: North Belmont P~E Site NCD 986 187 128 North Belmont, Gaston County, NC Review of Public Water Supply Systems surrounding Site
On this date, a review of Reference #l (Public Water Supply Database) from the North Belmont PCE Site Preliminary Assessment (PA) was conducted. Twenty-two community wells, having a total of 3498 groundwater users, were identified within the 4-mile radius of the site. There are no publicly owned municipal groundwater supply wells located within the site target distance limit. The location of these community wells can be found on Figure 3 of the PA. A copy of the database print out is included as an attachment to this memo.
Attachment:
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, J 12/l9/91 GRIU-DJ51JOO/O)Sl954-0805853/D81V722
---...
PAGE 0001
-ia ---• -•
--
12/19/91 Gt110-0351300/03 519 51, -0805853/0810722 PAGE 0002 i ! ~
P\'110 PWf.lANAME PWMAARCO PWHAPNUM PWPLSOCl PWPLPOPL PWPL TYPE PWPLAC V PWPLLATl PWPLLONl i
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;; 6165'i78-·HANDY--DAND_Y-:-F.tJO"t:f~STORE. --;-1,--704 .. )?~l5~r---,t;G 000000~)5 u A·_: ,1_ 0351522-08058_57 e. ' :: ____ ·--···· -~----· ---'-·-----. ,. :· ::. ,~c:__:_ -,--' ~~(?"";:~,..~:~~ ,\\ s :: ---·--·-----···· ·--------·--··---·· ---6·,\%;------N~c~~-~ ~--~, ~
-----4.'-~~"-... 0,-f,p'-:» . -·····-··----------· --'IJ,, '<_s.,,-------····-·-------------
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To: File
From: G. Doug _Rumford~
Date: June 29, 1993
REF.8
Memorandum
Subject: North Belmont PCE Site NCD 986 187 128 North Belmont, Gaston County, NC Population and Groundwater Population witin 4 miles of the site .
The groundwater population living within four miles of the site was determined by combining the data obtained from. the NC state Center for Geographic Information and Analysis and a house count of the area within each distance ring using topographical maps. The CGIA data was based on 1990 census data while the house count was based on a windshield survey and on maps published in 1970, 1973, and 1983. Municipal water supply system boundaries were identified and those houses not included within these boundaries were counted as groundwater users .
Houses
Distance(mi)
0 -1/4
1/4 1/2
1/2 -1
1 -2
2 -3
3 -4
G.W. Houses*
25**
121
84
413
500
704
1847
* Based on areas not, serviced by ** Based on number of residential
County Health Dept.
municipal supply systems.
wells sampled by EPA and Gaston
People (Based on 2.64 persons/household, Gaston county, NC)
Distance(mi)
0 -1/4
1/4 -1/2
1/2 -1
1 -2
2 -3
3 -4
G.W.Pop.
66
320
222
1091
1320
1859
4878
."~':;)!;•
---;:'.-_J(
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.. ,!, .• :-
··:;}::c
•.::...
I 1 5f; CENSUS q PAGES Table 6. Household, Family, and Group Ouarter_s Charac\erls\lcs: 1990 ~!W'nlbMd1onn11M,..W?d'1"t>oia.-'""1J S1a1e F....,h>~ ......,, ........ ..... ..,_ ......,,_ ~ P""i' q.io,,•11 C<lunly l~M,,fob... Place and (In Selected ...... Slales) C<lunly ...... &S,--a-,4.,.. ...... -~ Subdivision ._,, M,___ i~ ........ ,_,_ .... '"' ,._ , .. , .. , .. ...... ,._.,. r,., ...... -·--····-··---------· 104 In t 11111211 IIUCl!J "'"'" nm "'m ... ,,., .. ,a,. ..... COIIHTY n---eo..-., __________________ ·~"" q"' :ioJO " "' .,., " "' " .., "'' "" ,a ,._.,.... Coi.nr -----········--· 'rJ us 10 lll ' "' 11 JIS .. , "" '"' "' "' ... ~'-Jc-.r.... . ... '"' ,~ "'' ' 'q, "" , ... "' "' a, "' N90~Co""'J-·-----z, Ill '"' "" 'tl-52 In, "" "" ' "' ... '" hlw, C:C....r, u __ ; ·-·---···-·-·-···· 21 DU , ... "" I"' "' "" "" 1 DI( .,. '" A....., Co1111J ••••-•-• ·•-• n Ill "" "" ',. "" "'' "" "' "' -'~ ~c-,ry -·· ····-· " "' 11 \fl " ... ... "" t Jl7 , ,u Im , .. '" &,.,,S eo..-r, ·-----·•--·-··-·--., "' 1 U1 "'" > 01 I ~II I 111 ,m '" m '" -'""' " "' m"' I 017 "" "" "" 'm "" , .. "' fnn,wb; °"'"J --------········ ~~, ., .. 11 2'1 <I a ' "' "" "" I w, I <M ,., l!o,ra,,rt:,o Co'"J ---·--····-···-1111 71) ~ .. ~ "' " "' T "' 1'1 ., .... •m ,-·-.;. -·:.:~.,, ~ ~ ····----.. ·--·-··· " "' ;; :;; ii;.; ::, m ; :;; ,.,. ... '1W ··t Z2I : UI "~· "" , .. I sr;it -;·· 2 '71 ..... ~ eo,,.,-, ______________ • 117 n,n ..... 11 Ul ' ... I 111 ·-"" ' ... :; 2.51' c-°""l'f----------·· ,m .,., , .. "'' "' m "' "' . : Kt ·;( LIO C...,-ec...wy •-o---••-••••-•• " "' '"" U 'DI U 1111 'm1 ' "' ',., I .,, '"' '" c...-c-a....y ____ '"''' , ... I m "" I me "" "" _-,-~ ·.-·,:, ~f > ... ~ c..u-ecu-r ----------------rn :,,n u"" "n, v'm ... , ""' ""' ~-c..., JI )U II "' II 2'.21 '· l!S ... '"' , "' ft m ·:1 m ... , o-; .. c--,, __________ ..... , ... . .. ,,.. hi I "' ' "' m n, .... a.-""'' " "" sm ,m ' "' "' ,,. "" Ml ... ,.,, C>r~ ··-"~ "'' ' m "" "' m .,, ... '" '" ~.....:I -·------···· --13 012 " "' ..... 11 DII «u "" 7 011 :. 'Zll: I 12t· .... c.-c..., ""' " "' '"" 10 :'Ill t rn .. "' u, _;:, t 151 I "' <U ~ ~. -·· -· l1 01• " "' ""' 11 "' JUI 7 '" .. I 121 ·• J.05 , .. ... "' "' '""' mM " "' " "' " .,. . 11 JU (m•··· '~ rn C<nt..::i ~ -----" ... ... ' "' ' m ~, , , .. ... (11 .••.• "' ,.. ~~------n "' ' "' "" ... .., .... , ... .: 111 "' "' ·~ "' ·-n n, ,o no I IZI )I "' '"" ·;4 1• I )1t .... """'""' ~ "' • ru ' "' ·-"' l !IU ... ""' "' '-" ·:. '""'""' " "' " "" , .. ,. '"' ' "' . ·-"" im ' "' ... °""'""' 171 J\O ns; u~, l:) ,;, 1G l:21 3 312 ,. "' . "" '°' Ul ~Cb,r, -----u,. :a:> lit 1S CIU .... .,., "'' --• 4 7a) . .-,, m 1 717 us ::::c. ~ =---"' .. ,ar u, n<11 Sl 1IS '"" '"" " "' :·, m ,m ,~ Z:>< '""' 10 1)(1 7.., ·'"' "" S TZI ""' "" .. , c.. ... ~----112 n, " "' m"' ,. .. : ,, Oil " "" '"" J: I . .., ... "'"'""' ,.,. "" "'' I~: .,. n, "' ,.. ,n c..i..rac-w,-·----------"" ,m 21U 1 UI ·• , .. .. "' ,,. "' .... ...... ,c..., lS 111 ll l:M "" "" Im ' "' ... I "' m ,u <>-0..., H YS l '°' . "" '"" m I ,a 11m m .. , ,n <a.r.::,(I~----· "' "' IJ7 JOI ""' 11 ltS .. -11 m ..c ,,s ,. "' 12 110 "" , ... k&llu eo-, " '" '"" 14 llt .... "" ' .. ' "' "'' I "7 ,.. lwf,,,ciCaurwy ---· " "' ~ ·~ 1152'1. "~ "" . "' sm "" "'' ,., ~~ . "' 11 211 14 \XI II i::11· .-.. 1 TT◄ • S COi . ◄ IDI "'' ... ,m IIZ>I •• 2170il II IH II Ill . ., .. . ' "" "" ' "' "" ,.,. ~~---··-21 Ut •• "~ ' "' "" ·: I (,l "" t,., m "' ... ~. ~ ··---------------21 IU 7 .. "" '"' , .. I ti\ I "(II "' "' '" H,o,C..., I ,o t "' I "' I ISi . '" "' Ill , .. HI U< h:WC-lf -""'' "m " .. '"" ""' '"" 7 ... ' "' ' "' "' ~~-D"' ' "' "~ "" NI t 11, 11q ... "' , .. ~~~-=:::::::::::::: ., "' " .. • "%3 tlf · i.· 11 W ' "' . "' 7 .. , ... t "" "' I UZ "" . "J C)lf •; 2(1),1 .., "' no .. "' ·~ ~====== . .,, II "' 111n:. '"' > "" ' .., ' "' "" "'' .... KW ·21 Ill U 111 :; 11 U\ ' "' . "' ""' ""'. "" .... . "' • II 7M U 611. :·· 1% %11 I "7 . "' "" "" ' ,n us =--" ~ -------·-----" "' •:ll lt!O 10361 :.:_. Ir.I I "' J rn t"' ... "" .... n"' . ' "' J Zl$ : . "" m t,. "" "" '"' ,.,. ...... '""' H ICM ..... ta ... ... "' "" I 110 "' "' ,... \.l.onn eo....,. -··--Ji Ill I ,a7 • 9CXI .: '"" 1 SU tm 2 tu I 10> .. u, ~Cbvur ·-.,, .. •. : 2IXI tn 1),1 :,u ta, 211 2S OU M "' ""' " -IO 110 .... ...... """ ./.""i-c 291 ·\·: I 111 "" sm m "" "" "' "' ,a ---··--···-··---;;? . ;! fi: :. ·:J: •vo "" 1 Ill 2 011 "" m ... .... -c..., -'"" H lU t m ' ... ' "' "" . .,, '" " ... c-.,, - -::.: n tSO. 21 011 i %1 %24 " "' > ' "' 7 117 "" t.., 2 11, ,., t;...,>w-on,~ •·1UM 411130 , .. ,. 247.;J ' "' '"" " "' •m 1 llt '" ~~ontlM.,-___ :ti C!SS J 591 "" ' "' "" I ,a 1111 ... ,,. ... Ett:I · -·· . m ZH .0 ISi " "' " "' > ' "" "" . "' "" '"' ,,. M l:!1 •::. )I IOI 21 1:tl " "' I S ,., I( 111 ,~ 110 "'' I DI ,.,. ~~ ____ _;_~----II ?U" : . C ,:::i ' "' tm I "' . I HI I °" '" "' ,a 21 N--1 , II llM ' "' ·~ ' .. , ' "' "" I"' ""' ,.., ,.,...o,.., "m< llm .... I 10< I '71 "" "" "'' "' ... -'""' . ~, '"' , .. , ... ... "' .., .., "' .... ~CblffJ -""' ""' '"' I ,n I "7 t "' ,~ ... -"' ~~r.:;• --H-• I:::! -0 ~ ~1 "c, 11 )61 I I m " "' 10 (12 "" 2 SIi "' =-1..;;;;------·-· 1, 111 I 110 ',.. I "' '" I "' "'' "' ... "' ![!:IDS 4-10 .,,.. " "' " '" ,, "' "" ""' ' "' "" ,.,, Fk"""od~ . " .,. ""' u "' "" '"' . "' • , 114 2 011 , .. "' ~c-.rr--ICD Ill '"" ~ "' II U\ "" "" '"' ' "' a, ,.., Ft>ct.~c...n,, ___ M"' " ... 21 171 11 :151 "" ,m ' "' ' .. . .. .... "'-'""' """ '"" 11 ms.· ,s ,m '4 Ill ""' " "' 4 , ... 1 &11 "' "'""""'""' 511 117 ,,,,. ".aao·· '1, 1t1 "" "" , .. "" "" ..,, ~~ . '" " "' ll Ill " "' ' "' "" 'm t .. "" '-" " "' " "' "" '"' ',. ... 2 IU lln "' '" ,....,c..., .. "' II 7(1 " •1 n a, ,m . "' ... "" , ,,. U< !;~-~.,., .. -,. ... "'" " .. ' "' ,m J 101 ""' "" 1 011 UI ~~-""' '"" " "' II "' t "' '"" Im "" "" '" ""' "" , .. t "' l :i-'I,., •• .., "' '-" 2E,"::. -.. "' ' "' 7 "' '"' '"' "" Ill! "' '" "" I t71 "" '" "' ,., .,, .. , .. ,,, -""' " "' " "' '"'' , .. ,m I OU "" "" .... SUMMARY POPULATION AND HOUSING a-iARACTERISTICS TTU~M"J O'>-IIJ1 Cl;NIV-0 Tl........» .,._,D'II '""~ ~H(;C 0.I.T ... ~V-O-"°ilff'TD .. TI1.0Un-'II IUUM 0UT1'Vl'.0Mil!l"l:-"1• ~""Ol: 101 T.,C:Ouv-o·o:i. _n,,, 1111u Ull'.~11. oun--11 ,.,1,, .. o.._~.._._ • ..,,.11.•~-:u::u . ...,t~u n;ai:1• Nn·1·;::. 'Tl,,,. nnn11l-,1:nn ,.,-,,,nfl" .. ;., r ..... ,i.. \, ...... :~ ----.. L: __ • •-,..., ,.., " , .. "" : •. Ule '-J:0 Im '-" ,. ··u1 ).11 '" ·-,., "' '" 3.11 ,,. 1<) <m ... ,.,, "" ,., , .. >.1S "' J.11 ' "" .... "' '" 1tt .... "' <M ,m ,m l.11 "' l.lJ J.11 on ' J.11 "' ..., uo l.1t , "" ,m ... '" ,., UJ "" , .. . '"' '" <n '" l.lJ "" I ,,. 1.U '" ,., '" : 1.ll 1.IC " ,u I ,.a u, I '" , .. "" , .. I ,.,, ,.,, I 1.11 ,,. ' , .. , .. ' 10, LU ,,. I ,., I "" , .. ,., ,,. I 1.1) l.tl ' ... , . ......,.. ,., ,,..... cu ... ,,.. • _., ... ...,n n " " n I ro • "' ,. " " " ~ n "' " '" .. -' t n ., .. " q ~ "' "" ' " "' n I " I ' " ' "' I " " ... ... I ' "' ' I • ' ' " ., ' • " "" "' ,,, NORTH CAROLINA 10! :'~\,'.'--C/ I,
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MEMO
TO:
FROM:
DATE:
Superfund Section Staff
Jeanette Stanley
REF.9
Environmental Chemist . _ __, 11N 1='"
NC Superfund Section
December 1, 1997
SUBJECT: Update on Status of Wellhead Protection Programs in N.C.
I I spoke with Mr. Carl Bailey, Assistant Chief of Planning, Groundwater Section, Division of I Water Quality, DENR [phone]. He said that there are still no wellhead protection areas within North Carolina.
Two applications have been received and will probably be approved. The Town of Black Mountain has defined an area, conducted an' inventory, and submitted an· application. A privately-owned public water system, JAARS, in Waxhaw, NC has also submitted an application. Mr. Bailey said that he anticipates receiving another application from Aiden, NC (near Greenville, NC) in the near future.
Mr. Bailey said that it has not yet been decided under which state agency wellhead protection programs will fall once DENR reorganization is finished. In the interest of having the wellhead approval process consistently applied for these and all future wellhead protection systems, the approval process is being stalled until reorganization in complete.
We discussed existing wellhead proteftion regulations. He said that all public water supply wells have an exclusion area of 100' around the wellhead. He said that there have been more inspections lately, and that fences have been bu,ilt around some wellheads to further protect the area.
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REF. JO
North Belmont PCE ,ito
NCD986 i!7128
US EPA REGION 4
NORTH BELMONT PCE SITE REMEDIAL INVESTlGATlON REPORT
NORTH BELMONT, GASTON COUNTY, NC Sf:SD PROJECT 96S-D58 / JUNE 1997
'
' lJ.3. ENY1RO\\H11ENTAL PRO TE C;TJON ;i; GEi'lCY R~GION 4. SCIEi\JCC AND =coSY3T~il/l SUP:=G:~; O!\/!SIOi\l ~ :-iP..Zt.RDOUS \fl/A.ST=. .SECT!ON c: '; 980 COU ... EGc STATIOi'! ROAC J ATHci'IS, GcORGIP.. 30605-2720 ~. [phone].
NORTH BELMONT
PCE SITE.
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TABLE OF CONTENTS
Section
1.0 Introduction
2.0
3.0
1.1 Purpose of Report
1.2 Site Background
1.2.1 Site Description
1.2.2 Site History .
1.2.3 Previous lnvestiga!ior;i~_;;z;4~'tjJr::::@.i::
1.3 Report Organization · · · · -,,.,.
...,~•::~ Study Area lnvestigatio ·;c-
. 2. 1 Surface Features '' ,,, . 1:':::· 2.2 Contaminant Source· rgations .1,>
2.3 Surface Water and Sedim$nt lnv~stigations · ,_,') ,r,..:"'1, ""' • -;;,,•.·,. 2.4 Geologi_cal lnvestigat_· ions'tN:;t•,;;.;_"/ ·· 1(:/ · ~::&¼s,..,:. f"~"-,. -•-~·.("'~-•-~~-~.«~.,::"~'-~· •. , ' •.. 2.4.1 Subsurface S'oll~la.yeslf"'a ;~' . ? ·,_~:; '·''"'" . <:.:.i~~-f.,.:;f" ,•:::-. ~--··"'~. 2.4.2 Bedrocklnvestfgaf1oa '!~'/
.'.''!. ,·,-:<_--~"'!"-""'-'7!,_d.::_',!£ '.: ·\7-:
2.5 Groundwat,E:r lnvestiga!ib!;f,~s,. -~•• ., ;:°";
2.5.1 Residential Drinking W -, .. ells"'· ''. ,:,·-·'•",!" 2.5.2 Temporary Monitcii;j.n,g WelJ~'.
2.5.3 Permanent,9round~er Mohitoring Wells
2.6 Decontamination Pr9cedyfeii} · '{j ?' . . ·
2.7 QualityA~sura~~/Qualjty Cgntrol; ... • ..
2. 8 Demographi~;f 4a'q~§f{n,dJ?Na,ter {Jse ·• .. ·
2. 9 Ecological Survey \t,;:;~lrt{f-'. :'•%{-Y<
· Physical Characteristics
3.1 Surface Features
3.2 Meteorology
3.3 Surface Water Hydrology
3.4 Geology
3.5 Hydrogeology
3.5.1 Geophysical Borehole Logging
3.6 Residential Well Inventory and Water Use
3.7 Ecology
3. 7 .1 Wildlife. and Natural Resources
3.7.2 Bioassessment
North Bemont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
Page
1-1
1-1
1-3
1-3
1-3
1-5
1-10
2-1
2-1
2-1
2-5
2-5
2-7
2-8
2-9
2-9
2-10
2-12
2-17
2-17
2-18
2-18
3-1
3-1
3-3
3-4
3-4
3-6
3-16
3-18
3-18
3-18
3-18
",....;.~~;:..~;_.,_ ',"'•;;:·-. i--'------------------_:._---------------~--===·=-?,§,f[...:a:.
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TABLE OF CONTENTS (continued)
Section
4.0
5.0
Nature and Extent of Contamination
4.1 Surface Water and Sediments
4.2 Subsurface Soils
4.3 Groundwater
4.3.1 Groundwater Plume in 1991
4.3.2 March/April 1996 ~I9}11,f'. -~jeB
4.3.3 Shallow Ground:@tei:11 e ' .. o.':...,;;'_~;,·• -J~': 4.3.4 Top of Bedroc,(S_f§!ES/,1;s, ... ;.. .. te "·
4.3.5 Bedrock Groun' ., ... ,C ,, · lume
4.3.6 Other Consti'f ,
4.4 Quality Assurance?°ffi'a''i"! ·
·~~-/ti>-~ '. ..
Contaminant Fate andturatisi5,i:f ·•
5.1 Potenticl'!fRoutes ot'fMi"';;,;;~;s•~ ..... ~ ... ,.-,;.,. ~~\\;": 5.2 Contaminant Persisteti
5.2.1 Che/njcal Pr'cspft!~, Ie -i~~~£Q,,,_1,,,,,d~-S" ,ii
5.2.2 Site-Specific Ch~r;nical'Propjrtfes .,i''
5.2.3 Contaminant Transport -G(oundwater'
5.2.4 Contami~aQt Transpqrt-Sl[r;face Water
5.2.5 Degradation"Mechar:i'tsms in'.the Natural. Environment
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3 1~~e;S~!!~~iil!{i~;, ~Jf [~~f .i{i/i~{;:tj~/~tf . .
5.3.3 Field Activitie; ~~-d Resuits ' . . .,
5.3.4 Transport Modeling Calculations
. 5.3.5 Sensitivity Analysis
6.0 Conclusions and Recommendations
6.1 Conclusions
6.2 Recommendations
7.0 References
Appendix A -Field Investigation Data
Appendix B -Analytical Data
Appendix C -Acronyms/Abbreviations
North Belmont PCE Sne
Remedial Investigation
North Belman~ Gaston County, t-JC
SESD Project No. 96S-058/June, 1997
4-1
4-1
4-2
4-3
4-3
4-8
4-8
4-13
4-19
4-20
4-22
5-1
5-1
5-1
5-1
5-2
5-3
5-6
5-7
5-9
5-9
5-9
5-9
5-11
5-15
6-1
6-1
6-2
7-1
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LIST OF FIGURES
Figure
1-1
1-2
1-3
1-4
1-5
2-1
2-2
2-3
2-4
2-5
2-6
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
4-1
4-2
4-3
4-4
4-5
4-6
4-7
Site Location Map
RI/FS Study Area :
Approximate PCEffCE Groundwater Plume, 1991
NCDEHNR Soil Sample Locations, July 1993
SESD Mar/Apr 1996 Sample Locations
June/July 1996 Subsurface S~Jk§~QJU~I~lR-311ions
June 1996 Shallow Tempo,F~t¾1'i~H¾t~i2~t::··; _ _
Top of Bed_rock Temporj~~ifti}'il~~l;W"aR "~t1tonng
Well Locations. .M,~'fili?-.,•¾~"" -. ,, •. · ~~·\f'__. .... ~,:,;::.Si,~, '-•.~~ .. -"';. ..,'.·.-._
June 1996 Surface W~!£l$!Jj!fm~nt Sami;,Jir.:,,, ~Ji9r
Bioassessment Sites, lillraname'~ributary%~f:t'S
Reference Site, Dutchmans Creek , '.,, . . '.~\~.,.
TopographT2IMPP ',
Surface Wafer°F>athway'.
Cross-Sectiori\Base"Map, , g . ,, ,
Geologic Crosis\?ection·A~f\':"~9'6,;J!c"'
Geologic Cross~Section B~Bt, Aug 19.96
Geologic Cross-Section C-C'~l/\ug 1 ~96
Top of Bedrock Confours, August 1996 .tc
Saprolite Aqy[fElf;,PotE!l[.ltiCln,etrii;•Maf?;' Octj 999 ·
Oct 1996 Bedf~i:l{e;g@f~rtf';o\~qtioriietricMap?:
Oct 1996 ResidehtiaLWeU:Surve}'Results · -: · ·C;c_:·.•:: .. _,._a·.··,_',:,':.;._ ;,.<•i°;,., .. ,,-• . .-10.: ·,-· "·.• ... •. ··:.'·. Location of Rankin Hardwood Forest ·
PCE Groundwater Contaminaticin, 1991
TCE Groundwater Contamination, 1991
Cis-1,2-DCE Groundwater Contamination, 1991
Mar/Apr 1996 PCE Contaminant Plume
Shallow Groundwater Plume, P(;E Contamination, June 1996
Shallow Groundwater Plume, TQE Contamination, June 1996
Shallow Groundwater Plume, DCE Contamination, June 1996
North Belmont PCE S~e
Remedial Investigation
North Belmont Gaston County, NC
SESD Project No. 96S-058/June. 1997
Page
1-2
1-4
1-6
1-7
1-8
2-2
2-3
2-4
2-6
2-20
2-21
3-2
3-5
3-7
3-8
3-9
3-10
3-11
3-14
3-15
3-19
3-20
4-5
4-6
4-7
4-9
4-10
4-11
4-12
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LIST OF FIGURES (continued)
Figure
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
' Top of Bedrock Groundwater Plume, Temporary Wells
PCE Contamination, July/August 1996
Top of Bedrock Groundwater Plume (Temporary Wells
and Permanent Wells) PCE Contamination, October/·
November 1996 i
Top of Bedrock Groundwater Ph,ime (Temporary Wells
and Permanent Wells) TCE Cg.Q!~!n!!i'i!}J\Rf;l,.9ctober/
November 1996 "~~,i!.,f;ifi>l}.,~1:,1'\if);;.;.,,. ")~~W±F...x.-~•~1":."·'&J.""-~~---;:-.~·:;::,
Top of Bedrock Ground~~~-!ijm,~{f~~~1~~ells
and Permanent Wells) J}J.,~.'"'"' .~JJ~E Con~m1 a.~o,;t
October/November 19 · · •~ ". ~
Bedrock Groundwaterfei . _ • ~drock MW: dfaafible
Wells) PCE Contamination, Qct/Nov :1996 _
Bedrock G~pundwate~ijJy_!}l7&(,§~9E~iM\!Yt~lt~•,~9table
Wells) TCE;qqptc1minat]8'@l@:~extl~i?)~fJ!}~ti~' .. _ .. ;
Bedrock Groy_ndwat~r Plq\J:\~}.~~~f~t~M,~J~~}j>,ota~!.e'"' . . ...
Wells) Cis-1,2-;DCE Ci:mtaffiii\{aJipJj~~-~~fti1i!396 > .·
1, 1 Dichloroeth'ene Coritart1i~itlfu'.9JLir~1KQQ'°!,0fiBedrock Aquifer,
OcUNov 1996 · \;, · ~"--· _,. 1>
1, 1 Dichloroethene,,C:ontamiriaJion iriJ~edrock Aquifer,
OcUNov 1996 •,.,_ / 'ft_ < / .
Trichlorofluorometha~~;Contaniir:iatidn in B~drockAquifer;,
OcUNov 1996} ,{(); , ... · ·t::, · · •··' ·"
}}_::.:• l ,. -.·-:;.::t: -,,,i:.: · · I
North Belmont PCE Srte
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S--058/June, 1997
4-14
4-16
4-17
4-18
4-20
4-21
4-22
4-23
4-24
4-25
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LIST OF TABLES
Table
1-1 March 1996 Private Well Sampling VOA Results
1-2 April 1996 Private Well Sampling
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
3-1
3-2
3-3
3-4
3-5
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
' Contaminant Source Area Investigations
Surface Water and Sediment Sample Locations
Subsurface Soil Sampling ·-'""""" ,f:;.>,~.t;,.·,•,:t~,"':,
Geophysical Borehole Loggi!:)gt;T;ci61
Residential Drinking WaJef]Welll!! ~~~v.:~="":;, .. ,'. ,i Location and Purpose d~MoiiifofuWells ··,;
;'J~.:.16,.~~~~~{''~" .
Spec!frcat!ons for Topiti~~t Monito1y. ..
Spec1ficat1ons for Bedr.o~Nlonitor Wells,w, .. ,,.
Well Stabilization Criteria , . . .. .
Quality Cof!trol/Quality:t,~§'l~D~ $'';_ pl~s.1G'oll~gefd
:3t1i;~f~:~,~-. f;;~,~?iff j"
Climatologi~[ Data;(9r 0f;iar.16 e\
Top of Bedro'ck Elevations,,,,,,
1996 Ground'M!!ter Elevllti,9_ii1 , .,,.·· .,,::· ,,;
Geophysical Bore.hole Loggir.ig Zones'of lnterE!st in
Monitor Wells ''\ · t. '. i{i i .. '::, \1, ~•."f;.!.' ;:" -'.,·' Results of In-Situ Physicocheiriical Measurements; Unnamed
Tributary A (Uf),;~dja,i'/:itJ<:> the Site;"cind [)utchrn~ns (,\;''"~7:,.
Creek (DC) ReferenceSStream•,·lluly 1·995, .. ,iI({,:'F\) {'/\tJt'· ~ ~; ·, :/~(_;})~::JN::L~Sf ;~•:;):~'\J).':~:+<<::~:-·~: ·-:~;~:2).?=. _ /j;: -: ":?\U:~~~1~~;}~·/: :\}.)-':".'./:_:·:,:,·: .,
Main Contaminants in the Surface Water/Sediment
· Main Contaminants at 5 Foot Zone of:Subsurface Soils
Main Contaminants at 1 O Foot Zone of Subsurface Soils
Main Contaminants at 15 Foot Zone of Subsurface Soils
Main Contaminants at 20 Foot Zone of Subsurface Soils
Main Contaminants in the Goundwater in 1991
Main Contaminants in the GW in_ March/April 1996
Main Contaminants in the Shallow GW Plume in June 1996
Main Contaminants in Temporary TOB GW Plume
July/Aug 1996
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County. NC
SESD Project No. 96S-058/June. 1997
1-9
1-9
2-1
2-5
2-7
2-9
2-11
2-13
2-14
2-14
2-16
2-18
3-3
3-12
3-13
3-22
4-1
4-2
4-2
4-3
4-3
4-4
4-8
4-13
4-13
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LIST OF TABLES (continued)
Table.
4-10A Main Inorganic Contaminants ir the Perm TOB GW Plume
Oct 1996
4-1 OB Main Organic Contaminants in ,the Perm TOB GW Plume
Oct 1996
4-11A
4-11 B
4-12A
4-12B
4-13A
4-13B
4-13C
4-130
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
Main Organic Contaminants in the Bedrock GW Plume,
Permanent Monitoring Wells, Oct/Nov 1996
Main Inorganic Contaminants in,ttie,Bedrock GW Plume, ,,,;;,,.;r.:;, -;!;,,{:.'.,~i~.'.;;,'·r.:c,+. '-..
Per:manent ~onitoring_ W~.!liJ~~~A~:l:l~t:,_,.
Mai~ Org_anic ~o~tamingJ,\1~1.~~'>f~J§~~,fil.~J;Jil~.
Re~1dent1al D_rink1ng ~~l~ffMs~MartljJH.~~~~¾96
Mai~ lno~gani~ C?nta,qWil~¥il,\~£Mthe GW _ _§LF!!.1)1'!,~ii
Res1dent1al Drinking Wat'er4Welfs, Mar tr.rr:o'!S~pf;111;s96
Quality Assurance/Quality Control Samples ..
Quality As_surance/Q~,~liJYfi~~-r:iirpJ,Stm l~~V.N(?, 1amples, ,
Mar/Nov 1996,-·~-iili:~· , ,-,-;' '"' :· .. , : ., ... _'.· '•,:.· ,~;t;~i.~,f_: .;;,-· . //: ,: '
Quality Assuraricef,gualifyl.'.:.Q ~si;lli;i:~.; anic:Samples,
Mar/Nov 1996 '\.i:c,,, '"-ij~~t -~r-· ,,t···
(··,.. :J,,.:," , •••?";f";i.:_11: _ I':' . ·,;S' _ .' ·
Quality Assura~0ce/Quality Contt23.,,.,~"" ,es; B~f Sampl~~;
Mar/Nov 1996 •'· ,r,, • · . .e.:·
-~•..;I ,,;._ "\\\: ' :0~~: ./;,:·
Physical Properties otOrganic':,Cont1iminants ··. J '· <' . .
~~~:~~::gi,i~ttfi~r~1i§tt;;:_i;~~§~~~!~-t.~,, •1:;; . .,·•t,~1{;t:;n···
Hydraulic Conductivities•iri ~e Bedrock C\,)\·, ... · ·,;;; , .... •. ,, ·: ," ~-•.• ::.J,,.':.;_c·;: .. ; ·-,~•l:~'.-,a>,r:--::;_<• · :, . . • , ·. · : ~-i·:: .. Bioscreen Model Input Parameters }/ ·· · · •. · ·,
Estimated Contaminant Migration Distances for.the Saprolite
Estimated Contaminant Migratiqn Distances for the Bedrock
Sensitivity Analysis Results for ~he Site Modeling Effort
'
North Belmont PCE Srte
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
I
4-15
4-15
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
5-4
5-5
5-10
5-10
5-11
5-13
5-14
5-18
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1.0 INTRODUCTION
The North Belmont PCE (tetrachoroethylene) Site is located in North Belmont, Gaston
County, North Carolina. North Belmont is a small city located west of Charlotte, North Carolina,
and east of Gastonia, North Carolina. The North Belmont area is a mixture of residential and .
industrial properties with light commercial districts. A majority of the people either work in
nearby Charlotte or Gastonia, or one of, the local textile manufacturing facilities. The North
Belmont Site consists of the former locations of tv,o dry-cleaning operations which are believed
to be the source of contamination found, in private wells and the dominant aquifer in the area.
Figure 1-1 denotes the general location of "Source Area A" and "Source Area B" of the North
:~lmo::::o::OF REPORTi•"" ·· .......... ··•
The purpose of the Re~[f{~g[~~~tigationJfi~sifaility. Study (RI/FS) process is to gather
enough infonmation about the s:ffe':t~!!&pport an infOrme'cl risk management decision on an
.appropriate remedy for the Site. The RI. serves as the mechanism for collecting data to . .,.... ' ... ,, -_ '
characterize site conditions arid,to.determine-ithe nature.of the waste. The baseline risk
assessment evaluat~s-risk to t-trtrnle11J'~~ii){r~~}thf:~'ij{/(briment. The Feasibility Study serves
as the mechanism for develqpmejjfJ~g$~.i:\iJ'.jg;~ndfqet$.[led evaluation of alternative remedial
actions. The baseline fisk asse§;3rri~Qf{i[i'.~3Jfi~f~asi~ility'study will be presented under
separate cover. "'1'',t)~t(tt}t
The specific goals dtthis RI include u,J following:
. -~----~
• Determining the nature b{and
1
tbe areal and vertical extent of contamination
(waste types,' conci:intfatio9s, and distributions) in soils, sediments, surface water,
groundwater, and kic:aLbiota afthe North Belmont Site; . ' .-,:: ,.
Locating the source(s) of contamination associated witti the Site;
' Determining the hydraulic characteristics and contaminant transport mechanisms
' of the underlying aquifer at the Site;
Evaluating the potential miwation rates and pathways of site contaminants;
Determining the potential receptors of groundwater contamination by performing a
well/water use survey within a 1-mile radius of the Site;
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 1-1
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SOURCcAREA
SOURCE: 0eLORME 1',lAP EXP!::RT
',. Co$lto11 Glirre ' ' ,-,
f
·./' r--
1
NORTrl BELMONT PCE
' FiGUR!:: 1-1. SiTE LOCATIO~I MAP
REMEDIAL INVcSTIGATION Rc"'ORT
NORTH Bcli\ilONT PCc SUPE::iFU~ID SITE
NOT~: ~JOT TO SCALE
NORTH BELMONT, GASTON COUNTY, NORTH CAROLINA
SESD PROJECT No. 96S-058, JUNE 1997 :&EPA CL_ ____________________ _;_ _________________________ _,
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1.2 SITE BACKGROUND
1.2.1 Site Description
' The North Belmont PCE Site is located in a residential neighborhood on Woodlawn
Avenue in North Belmont, Gaston Cour:ity, North Carolina (latitude 35°16'24.5" and longitude
81°03'04.5"). During the RI, two sourc~ areas were observed which consisted of two previous
dry cleaning operations; the former Untz's dry cleaners (Source Area A) located at Roper's
shopping center in Land Lot 5, Parcel 1.5-1 BA and the former dry cleaners (Source Area B)
located at the intersection of Acme Roa_d and Suggs Road in Land Lot 11 , Parcel 15-18.
Figure 1-2 shows the approximate RI/FS stugy,c:!rea of the North Belmont Site.
1 22 s;te H;sto~-~e1i?Ji \~~tJ12[;,
Source Area A was oper;~f~q,(py}.(p_e Untz fainily,Jr,i:irtii,~ 960 to 1975 as a dry-cleaning
establishment. A boiler locate€i\f>'.~h\1r.icfttfue buildir,ig,Wi:i~{6Se(1 to "distill" the waste dry cleaning
solvents. The spent solvent resicluetfrarn'the bofier"dfst\Hation unit was reportedly disposed
o_nto the _ground surface behinsM~~fB~Jl~ID9,'.cf~-~.9,?P:9~-Ti.9!Y,~nts were dispos_ed through the: on-
site septic tank system .. Source(Area•;S'.wastalsoyoperated by the Untz's family prior to moving •. ···: ·.· · ·:.·: ·-~'ii~1-,·s,1,~,r.:'i'""'."'•":!,~,~--;.,:,-':.'\S,1/.;,":····••r'·· ; ... ;,r;-, ... •C:•'"·_-'::~'/ .~,.-:,;· .,,. :, ., .•
the. dry cleaning establishmemt tojgg_i),,~:fi~J§J;igi:iPi}:iJH~~i:)!~'r. S_ource ~rea 8 was discovered
during the site reconric:1issance iri'Cic::tq6¢f&1.$~§ifri:im~andriterview with a local resident. -. ·:·,-.. '"'~:;:_-;{fif~1~-iti~l1Efit?::·:-,. _ .
In February 1991Jtl1e Gaston 'County·liieaith Department sampled the well that provided
water to the North BelmontElementary School and two single family dwellings. This sampling
was associated with an effort 9Y the County tb'. evaluate community water supplies for volatile
organic compounds (VOGs) contaminktion: .The results of this sampling indicated significant
VOC contamination in the well. ·. · ' . . . : .:.·.; .
EPA Region 4 Emergency Rks~o~se yrcis notified. EPA and the Gaston County Health
Department sampled 25 drinking water wells.'\Tetrachloroethene (PCE), trichloroethene (TCE)
and cis-1,2-dichloroethene (1,2-DCE) were detected in sixteen samples. PCE concentrations
were found as high as 15,000 parts per 9illion (ppb). The elementary school was immediately
connected to the City of Belmont water system. Twenty-nine of the neighborhood drinking
water wells were taken out of service and connected to the Belmont city water service. All but
12 of the residential wells were subsequently abandoned by grouting them to the surface; 12
wells remained intact and were proposed· as monitoring wells. Seven residences in the
neighborhood were informed of the contamination but chose to continue to use their wells and
not connect to city water. Wells still in use in the vicinity of the Site were scheduled to be
sampled by the Gaston County Health Department. However, these wells were not sampled
until EPA's investigation in 1996 (reference the following Section 1.2.3).
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESO Project No. 96S-058/June, 1997 1-3
--- --
CHICTARY
:::--::::::::_'.::':::':;:::::::::;:::::_--~, ~Z2> J
,
"
02 LOT uuuarns
., PREVIOUS ORY CLEANING fACIL111£S
PREVIOUS R£fRJG£RATOR RfPA.IR fACIUlY
U MACHINE SHOP
SCAI_E
0 250 500
301 ,~/
-
1. --·•·tr· -j r •I
z' )-'( ~7'-$ -.v9
'
< IN FEET )
INCH = 500 FEET s,__ _______ .lf._
.,
--- ---
" "
~EPA
--- ---
FIGURE 1-2
RI/FS STUDY AREA
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNTY, NC
SESD PROJECT No. 965-058, JUNE 1997
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1.2.3 Previous lnvestig~tions
In July 1991, the EPA Environmental Response Team/Response Engineering and
Analytical Center (ERT/REAC) installed one bedrock and four overburden monitoring wells in
the immediate area of Source Area A Data from these wells was used to characterize the
residuum and saprolite, the bedrock lithology and fracturing, and the primary groundwater flow
direction at the Site. Sample analyses from the five monitoring wells revealed the presence of
volatile organic compounds. Figure 1-3 depicts the PCE/fCE contaminant plume in 1991.
A Site Inspection Report was prepared by the North Carolina Department of
Environment, Health, and Natural Resourc;?.s,(l';{GPEHNR) Superfund Section in July 1993. A
total of eight on-site soil samples andJWoJiacl{gfqur,d,,soil samples were collected for analysis . . ,,..,~,._,.~,cJ, ,. ~·'>•,:t•·:,•-r -"~ , .... ,.,,~.--,_-~_-:,
Figure 1-4 indicates the location_.ofi!!j~~~j~§iH~'.a:niplE!~f1},vo samples collected from the area of .. -'·•-,~--·.if;·~"-·,-.~~,•~·""k ~ .. c,;.F • .,; .•!\·~,-•..-.• .~,:\, monitoring well MW-01 revealeg;Q1~,ef~seiice''6fs:?c;:~.t9°J;(eff9J concentrations of 1,212 ppb and
-150 ppb. No VOCs were'foundiimtnefsci°il samples/collected on the Site; therefore, the source
of the VOC groundwgter conti{@I/i!~fiqq;'.~s not is!~QffQ~~~filhe State was unable to locate a
septic tank on the north side of the shopping center thought to be a possible source of the VOC
gco""'::~,:;::1::::::~,!t-~tit,.;,.,e,ci~;so;1 samples rollected
from the elementary school pro~ertyJ14.~~~!tWJ~ggp1Jq~[~rc1r::10ge~1cgature of the compounds
detected 1n the groundawater pluITlEl, ·an:•s¥Rl~,ll!~Jii:J)31te lnvest1gat1011 was recommended.
· Based on the results of the study co11cernifi'gJhe schoc:>Fproperty,Jhe Gaston County Health
Department collected an additional 23 soil samples for chlordane analysis. One sample , •, .,, • I ('0••: , ,' ' /
revealed chlordane at a levelo_f 5400 p pb; hg'!"ever; the Gaston County Toxicologist concluded
that this level of chlordane in the soil around.the school did.hot pose an unacceptable health
risk. · .· · _:·. , .,· , . · . , -··. • _--:· · ·
. '-_ ' \ ' .. •,,, . , .. ',, ··,·•-· .
In March 1996, EPA sampled. 25 residential wells (seven were converted to monitoring
wells in 1991) in the vicinity of the Site (Figure 1-5) to update the 1991 analytical results. The
results of this sampling event are presented in Table 1-1. As a result of these findings, one
additional residence (Sample No. 033-PW) was connected to city water. This well did not
contain any contaminants in the initial 1991 sampling event.
' ' High levels of trichlorofluoromethane were found in three of the wells, and as a result,
this compound may have masked low concentrations of the other volatile organics. Therefore,
EPA resampled these wells in April 1996. These results are given in Table 1-2.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 1-5
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' '
SHOPPING
~ CENTER
WELL
I ' ' '
N
/ NOTE RE.::::.;:iS-JCi::'"NEL!.. !NS7AL!..,\TIOM. S,l,MPUNG ,J,NC ;::P.S!..IMINA?.Y ~-f □RCG2JLGG!CAL iilVE3";"iij;.TiCW ::cf::
NOTE: NOT TO SCAL£ j NCRTl-i 8E.!...iviCMi R0,1,0 SI".":?:. ~IC?.iH Ba:VlOMT MORT~ CAP.Ct.l~IA, OCTGE!E?. 1991 ROY F. •NES70M !: IC
FIGURE -1-d. APPROXIMA.TE PCciTCc GROUND WATER PLUi\/lc, 1991 ' RcMEDIAL IMVcSTIGATlON RcPORT
NORTH BcLi\/lO~IT PCE SUPERPUND SITE
NORTH BELi\/1O1\lT. GASTON COUNTY, NORTH CAROLINA
, SESD PROJECT No. 96S-058, JUNE 1997
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-·\~
·, ;~•· ,----------------------'---------------------------------',' :'~~
SHOPPING
'' CENTER WELL
OLD
FOOD
LION
,') MONITORING WELL LOCATIONS 1 \ ' .J SOIL SAMPLE LOCATIONS
',
'
MW-3::J
MW-2i>•----
,, "'· '. :ir '/Jf
; : IOT~ REFE::~ENC2: "'NE.~ li'ISi,lL:.Jl.TIC-M, SAMPl_!,'lG ~; JO P~2..!Mli'IA?:Y ;-,·rc?cGEJL-:GiCAL !MV':STIGAiiGN" F·:)R
; : 1G?7:-! 6ELMONT POAD SITE, ~IC?TH 8E'.MON7 :,ic,=;,,;-(cAP.Cl!N,l 0c-:-cscc= '.$:i'. ?:C'( F 'N:s:--:::r1 •;,:c !'JOT~: MOT TO SCAL::
F!GUR'.:: 4-4. NCOE:-tNR, SOIL SAivlPLE LOCATIOi'IS, JULY 1993
1l'!h. E R~ REivlEDI.A.L INVESTIGATION REPORT ~i '.,,$ , ; ' i'IORTH BELivlONT PCE SUPERFUNC SITE
Ei ~-,v d 1
. . NORTH BEc.i\ilONT. GASTON COUNTY, i'IORTH CAROLli'IA
01 ~.::\ al,~ , , E"-, =-~ SESD PROJ ~ 1 ,,Jo. 968-053, JU~IE 1997 01~----------------------'--------------------------1
--
G2 LOTS
•,, 11:,1• i',1,111: fl• •/111,HilN•' \',1"! I 'i
k ;_·;1 ~'-'11'1 f. I OC,\llfJIIS Ill Flf.<;IO[IIWJ. \':El I.S
E.?ZI ~!!.!Pl[ IIX:.AllOIIS /IT C:0/M:RTEO 1.101/ITORUIG \'/El.LS
(t'rlf.Vl(IIJS nES!OElfllfJ_ mrnurn1G \'lf.lrn \'/ELLS}
SCALE
250 500
! I
< IN FEET
11.JCH ::: 500 FEET
--- - ----
" "
~EPA
-----
FIGURE 1-5
SESD MAR/APR 1996 SAMPLE LOCATIONS
REMEDIAL. INVESTIGATION REPORT
' ' -
NORTH BELMONT PCE SUPERFUl~D SITE
NORTH BELMONT, GASTON COUNlY, NC
SESD PROJEC r No. 96S-O58, JUNE 1997
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MARC'-11096 ?RIVATi:: WE• ' SAMP! ING VOA "<"SUI TS "OR Ti-IE NORTH BE' MO~JT "'~"' SJT= -. -. ---. ---·
SAMPLE LOT/ADDRESS PCE TCC
NO
1,1 ... JCA cis 1,2-~C2 1,1,1-TCA 1,1-DCC CHLOROFORM
C01-PW 78/2':;07 Bounda,y ND ND ND ND ND ND ND
C03-PW 2.01 /601 Woodlawn 12.l. 0.€8AJ ND 0.52AJ ND ND ND
C04-PW 3.05/505 Woodlawn ND ND ND ND ND ND ND
011-PW 29/114 Roper . ND ND ND ND ND ND ND
012-PW 39/2115 Acme ND ND ND ND ND ND ND
013-PW 43/22G5 Acme ND ND ND ND ND ND ND
014-PW 4'V22.07 Acme ND ND ND ND ND ND ND
01i-PW 56/101 Roper ND ND ND ND ND ND ND
018-PW 61/116 School ND ND ND ND ND ND 0.66AJ
019-PW 62/114 School ND ND ND ND ND ND 0.62AJ
021-PW 65/104 ApMcot ND ND ND ND ND ND ND
033-PW S6.01/23CSAcme 430 2: 1.3 26 ND 1.3 ND
034-PW S9/104 School ND ND ND ND ND ND ND
cr:37-PW 114/102 ODaniel ND ND.· ND .ND ND ND ND
038-PW 11612232 Acme ' ND ND O.eOAJ ND 1.2A 3.0A ND
039-PW 118/2228 Acme ' ND ND 1.2A ND 1.2A 3.'IA ND
040-PW 121/2216 Acme ND ND ND ND ND ND ND
041-PW 123/2208 Acme ND ND ND ND ND ND ND
042-PW 123/2208 Acme ND ND ND ND ND ND ND
044-PW 128/202 Cl:!nterview ND ND ND ND ND ND ND
045-PW 142/118 Thomas Fite ND ND ND ND ND ND ND
. 046-PW 31/104 Roper ND ND ND ND ND ND 0.87AJ
04i-PW 42122r:E Acme ND ND ND ND ND ND ND
048-PW 1C8/105 ODaniel ND O.SAJ 0.88AJ 0.52AJ 5.2A 3.-l;l. ND
0"9-PW 1 C9/2304 Acme ND ND ND ND ND ND ND
I note: TCFM -TrichJorofluoromethane and 5~1_: exceeds primary Ma:dmum Comsminant Levels (MCLs); ND-NOT DETECTED:
VALUE: J • ESTIMATED VALUE: PPB -PARTS PER BILLION (UG/L)
, ......... -· --
ii "N!=:...:... \!O I LOIJADDRESS !
C01-PI/I/ ! 43/22C5 Acme
I CO2-PW d4/2207 Acme
I C03-PW 112.03/Dumom I
~lorth Belmoni PCE Site
Remedial Investigation
" ~
I ?C2 I ' ' ND I I
i NO I
! 4.3A I
l'lorth Bc!mont. Geston County, NC
SESD Project ~lo. 96S-058/June. 199i
---' -· ~· '~' .
"TC2 I ~.1.;:c.3. i c:s ~.2-:c'.= ' I i
ND I MD i MD i
ND I ~ID ! t-!G !
I I 0.78AJ I o.aAJ O.E6AJ I ' •
--
1,1.~•TC,.l. j ·:;:~::c::: I c:-iu:;::.c:=-:?,M
ND ND I ND
NO i'JD I NO
~10 3.0A : ND
TC:=M
ND
ND
ND
ND
16A
i20A
240A
ND
ND
ND
ND
ND
ND
0.66AJ
2.SA
2.9A
62A
ND
ND
ND
ND
ND
ND
4.0A
ND
A-AVERAGE
i -rc::~i1 ' ' ' 810J i
! 2COJ
i NO
--. '.-.
I
\ .1 1.3 REPORT ORGANIZATION
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This RI report contains six major sections:
• Executive Summary.
• Section 1 -Introduction .
• Section 2 -Study Area Investigation. Includes field activities associated with site
characterization.
•
•
Section 3 -Physical CharaC?~fl§.\!~,-of the Study Area.
activities to determi · · .
Includes results of field
Section 4 -Nature.ial]:, -· e:
characterization, 1it~i~rt>und _
' : jj~i~~~
. n. Presents results of site
: water and sediments.
~~--Section 5 -Contaminant Fate and Transport. Discusses the potential routes of • • . ~ . /4 ~ •
m1gr~~i;;::½, lJtI £• , . :-
sect,on,s•~· summa,
\'},., •;,;::?-t;,,_ ~ ._;:.J:
. '~>.. JJ-Section 7t References:-~ff-,;§>
Appendix ~\1; ield 1;:~~!i;atiodI□ata. ,/'/l .JY,f
Appen~i?'(,B,::~~lytigal ~~ta. ~~ ·;/ .-r:f{::;:!t':·:•
Appe;J~"ifllli:(l6rzf J1f it\1'i)li1( ;f,i••·
•
•
•
•
•
North Belmont PCE Site
Remedial Investigation
North Selmon~ Gaston County, NC
SESO Project No. 968-058/June, 1997 1-10
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'I• •,,tW'; 1 :: •·.·,~ f
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2.0 STUDY AREA INVESTIGATION
2.1 SURFACE FEATURES
Surface features of the site were evaluated during an initial site reconnaissance
conducted October 1995. During the site reconnaissance, the locations of buildings, utility
lines, property lines, fencing, roadways, railways, drainage ditches, surface-water bodies,
vegetation, topography, residences, and commercial buildings were identified and recorded.
The site reconnaissance was conducted for a radius of a quarter of a mile from Ropers
Shopping Center. In addition, aerial photographs obtained from the Gaston County Tax Office
were reviewed, and interviews were COQ.9Y£\!"/P\Y>'.i.1h local residences to obtain additional
information concerning historical sitElJei:iti:Jrj~-~Toppgr1:1phical Maps obtained from the United
States Geologic Survey were alsofr~vt'~ct]t6'¥reve'a"htopographical relief and trends in the
area. Specific site features wer.~\fqcy,J~J8~Tif'~J9}~ir;~g~jUoning System (GPS) equipment to
determine the easting and nof1tlj~g~fginates; t~~~.!rj,ell'.!Jed pertinent roadways, forty-three
residential drinking water wellfi~0Jrew permM;'Q!fgfou.tld-water monitoring wells, and nine
converted residential monitoring wells. Vertical elevations of the monitoring wells were
manually surveyed with transit"a!Jd .~Q~:, .. ,,/ __ ,,.-t" ,_ ,,.t)fr;,-".. A'.'
. .?F);t.·~: ~ _ ·:~{;ji{~ii!,{ffJ'. :?fi\}0{~ittt;i~/{:}}}t
2.2 CONTAMINANT SOURCEilNVESmtG'ATIONSt/:;i".:l'"
~\t_'!'_ ---\_~-~-. ·-:vtttt;:~~~tiiIJf~SJ;;~J~fA1fi1}f-=·· .. -_-->,-· :··
. ·-'.•;;:.t , '.,.,-_
Four sites were 'ir;ivestigateg asiP.O.lififii:i!tsci,urce areas: the previous dry cleaning facility
-located at Ropers Shopping Cente{1\the diy~s(eiii'ning facility located in the northeastern
quadrant of the Suggs Road_ and Acme_ Road/:intersection, the refrigerator repair shop located
north of the intersection of Julia Court'.and Acme Road, and the machine shop located in the
southern quadrant gfJhe intElr_sedicm biAcrri~and•~enterviewR()ad. _Soil borings, temporary
monitoring wells and·p~rmcin'~~t rn8'11itoring ,&ells ,...iere used:tb•search·for the location of active
sources such as contaminatedsi.Jbs1.1rfa.ce:soils sin~the original sources ( the boiler
distillation unit, or the ~eptic tan1<f6t'88ntiffiiHation are no longer present on the Site. Table 2-1
shows. the soil borings or monitoring wells placed to investigate each suspect source area;
Figures 2-1 thru 2-3 indicate the respective locations. The installation and sampling activities
are noted in Section 2.4 for the soil borings and Section 2.5 for the temporary and permanent
ground water monitoring wells.
TABLE 2 1 CONTAMINANT SOURCE AREA INVESTIGATIONS FOR THE NORTH BELMONT PCE SITE .
. ---•SUSPECT.SOURCE "AREA .. ·< , • · . •·. ·.',. .. --··:·· · SAMPLE LOCATION ·· -
Dry Cleaning Facility at Ropers Shopping Center SS-3 thru SS-7, HA-1, HA-2, SPT-1, MW--6
Dry Cleaning Facility at Suggs_ and Acme Roads SS-1, MW-10
Refrigerator Repair Shop SS-2, TW-14
' .
Note: SS = Subsurface Soil Same1r HA= Hand A'!/\JJ Sample; SPT = Standard Penetration Test (SPT) Subsurface Soil
Sample: MW= Monitoring ell Soil Sample: = Temporary Well Soil Sample .
North Belmont PCE Site
Remedial Investigation
North Selmon~ Gaston County, NC
SESD Project No. 96S-058/June, 1997 2-1
---
CONCRETE
SUPPLY
-
82
-80
81
-la --1!!11 ---1!!111 -
109.0J
NOT TO SCA!..£
~EPA
"
f
FIGURE 2-1, JUNE/JULY 1996
SUBSURFACE SOIL BORING LOCATIOMS
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUl~TY. NC
SESD PROJECT No. 96S-058, JUNE 1997
0 q:•.!<•·.: ;-,_,,,.,, .. ·~-·.,,·
11'1· If)
----
1.02
COl,CRETE
SUPPLY
- -
16
87.02
87.01
88 6 990 91 67 '
65
•
62
6
--·-
96 109.0J
96.01
94 ..
102
NOT TO SCALE
!;EPA
- - -1!!11!1
" ~
FIGURE 2-2, JUNE 1996
SHALLOW TEMPORARY WELL LOCATIONS
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMOl,T, GASTON COUNTY, NC
SESD PROJECT No. 96S-058, JUNE 1997
iiii --
lililiiil liiiil -- - - - ---------- -
" " "
,J,hlUJUlll---...... ~JdJi;;;:;:~::!::~=:=n ([H(J.iJIT '-. :-:;::=:;::==:::~ ' , .. -,y ,-.J----, 1-,'--.--.-r-\ ----. ·•-~I-
' -
'" f'ZJ .. ~~~•1,1 \ !•::=:,~w11100 , --
,., lo • /
~ . < -~~-;;_;i:. <:?o • : :;-•!~ \ ·nom, "'""" V '
.) " -" /')~ (UH $0IOOL ~ -~/w ~ " ,,.-,~-~-"
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LEGEND
U LOl NUIABE:ltS
TOP Of BEDllOCI> UOHITOOLMG \'/ELLS
Bt::DllOO> 1.10tJ1TOR1NG \',ELLS
0 0.05
~ APPROX. SCALE 1N MILES
~EPA
FIGURE 2-3, TOP OF ROCK TEMPORARY
WELLS AND PERMANENT MONITORING
LOCATIONS, JULY/AUGUST 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNlY, NC
SESD PROJECT No. 96S-058, JUNE 1997 --------------------------------------'---------------------~~--~~
-
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2.3 SURFACE WATER AND SEDIMENT INVESTIGATIONS
Three surface water and co-located sediment samples were obtained at the locations
shown on Figure 2-4. Table 2-2 denotes the samples and the rationale for collection.
TABLE 2-2. SURFACE WATER ANO SEDIMENT SAMPLE LOCATIONS FOR THE NORTH BELMONT PCE SITE.
SW/SD-201
SW/SD-202
SW/SD-203
:sAMPl!lNGiRATl0NA ' .
Confluence of "Unnamed Tributary -A" and "Unnamed Tributary-B" -to determine
the impace ot the Jadco /Hughes Superfund Site
Downgradient of North Belmont PCE Site -to determine influence of site on stream
Upgradient of North Belmont PCE Site -control sample
NOTE: SW = Surface Watec SD = Sediment
Samples were collected first from the down gradient portion of the stream and then
proceeded in an upstream/upgradient direction. The surface water samples and the sediment · ··
volatile organic compounds (VOC) sample was collected directly into the sample container. The
sample was collected facing upstream with minimal disturbance of the sediment. Surface water
samples were collected prior to the sediment sample. The VOC sediment sample was collected
beneath the water. The sediment was scooped in the jar utilizing the lid and sealed while
staying submersed to minimize volatilization of the chemical_ constituents to the atmosphere.
The extractable organic and inorganic samples were collected with a stainless steel spoon.
The sample was collected by wading into the surface water body, and while facing upstream,
• the sample was scooped with the spoon along the bottom of the surface water body in an
upstream direction. Aliquots of the sample were then placed in a glass pan and homogenized
utilizing a quartering method prior to filling the individual ·sampling containers. Samples were
placed on ice then transported to the command post where chain-of-custody for the samples
completed using the FORMS (Field Operations Record Management System) computer
program, preserved, tagged, sealed and placed in an ice cooled laboratory container. Samples
were shipped to SESD's laboratory for analysis. The surface water/sediment samples were,
submitted for full scan Target Compound (TCL) and Target Analyte Lists (TAL) constituents.
All sampling activities were conducted by SESD personnel in general accordance to the
Environmental lnvestigatioi:is Standard Operating Procedures and Quality Assurance Manual
(EISOPQAM), U.S. Environmental Protection Agency, Region 4, May 1996.
2.4 GEOLOGICAL INVESTIGATIONS
SESD's investigation included installation of shallow soil borings and shallow temporary
monitoring wells. WESTON's investigation included installing deep soil borings, top of rock
temporary monitor wells; and permanent top of rock and bedrock monitoring wells. Other
activities conducted by Weston included development of the new monitoring wells, slug testing
and geophysical borehole logging of each well. All sampling activities were conducted by
SESD personnel in general accordance to the EISOPQAM. These activities were conducted to
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 2-5
- --lilii -- ---
i,o,u..Jl9!!{t!EBU _".B ~~, _::-,--~ ' <
::,.,-----' ------/ / . >f~/. -::/ ___ ,._
/ ~![· \] ~-c~=~=
3
p=N~=~~:=":==~~~~Tf1\_T-171tt.:.:. ~,:·::~-\
I "' -J,
" E!LfbSfJilll[
"
--------
-"
" " ---------1
"
:..., '"·'· ~
" "
SC(;LE
0 t..,,. 250 50U J J"T ·=·j
IN FEET >
I INCH = 500 FEET dbEPA
---- -
------
UldUIJ(O lfllll,IJ(l/it-0"
"UIIWl£D TllllllJrAAr-,1,·
"'UIDll,UU) TlllOUIJJH-8"
FIGURE 2-4, JUNE 1996
SURFACE WATER/SEDIMENT SAMPLE LOCATION
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUl~TY. NC
SESD PROJECT No. 96S-058, JUNE 1997
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~ ·i':. evaluate the extent of contamination in groundwater underneath the potential source areas, as ,:
well as the surrounding community. The methodologies employed to accomplish this objective
are described in detail, in the following subsections.
2.4.1 Subsurface Soil Investigations
In June and July 1996, a total of sixteen soil borings were installed within the study area.
The locations of these. soil borings are shown in Figure 2-1. The soil borings were installed to
locate active sources since the original sources of contamination are no longer present on the
sites, as well as, to determine the extent of contaminated subsurface soils. Soil borings SS-1
thru SS-10 were installed to approximately 10 feet below the groundwater surface; HA-1 and
HA-2 were installed to.hand auger refusal (these borings were drilled by SESD); and borings
SPT-1, MW-6, MW-10 and TW-14 (installed by WESTON) were drilled to the top of bedrock, or ·:
to auger refusal depth, whichever was first encountered. Table 2-3 lists the sampling location ..
and rationale. :·,,.
Each soil boring except HA-1, HA-2 and SS -1 was advanced using the solid stem
auger method. HA-1 and HA-2 were advanced using 4-inch stainless steel hand augers, and
SS-1 was advanced using the hollow stem auger method. Soil cuttings from the drilling were
used to create a geologic log of each borehole. Geologic borehole logs of the soil borings may
be found in Appendix A.
. TABLE 2-3 SUBSURFACE SOIL SAMPLING FOR THE NORTH BELMONT PCE SITE
!,wltSAMP.ltEl:'.0CA'FION~ ~~l;Mm!)t~~"il,'1,1[llf~SAMR!clNGiRA'FIONAl!Es!:J,;:;.:;.~~S,'1".l.~!W~"¥'tlfil$1J
SS-1 . Dry Cleaning Facility at Suggs and Acme Roads -Shallow Soils, Source Area
MW-10 Dry Cleaning Facility at Suggs and Acme Roads -Shallow /Deep Soils, Source Area
55-3 thru 55-7 Dry Cleaning Facility at Ropers Shopping Center -Shallow Soils, Source Area
SPT-1 Dry Cleaning Facility at Ropers Shopping Center -Shallow/Deep Soil, Control
MW-6
'
Dry Cleaning Fac!ity at Ropers Shopping Center-Shallow/Deep Soils, Source Area
HA-1 Dry Cleaning Facility at Ropers Shopping Center -Shallow Soils, Inside Building
HA-2 Dry Cleaning Facility at Ropers Shopping Center -Shallow Sais, Septic Field
55-8 thru 55-10 Dry Cleaning Facility at Ropers Shopping Center -Shallow Soils, Extent of Contamination
55-2 Refrigerator Repair Shop -Shallow Soils, Source Area
TW-14 Refriaerator Reoair Shoo -Shallow/Deen Soils. Source Area
Soil samples were collected for chemical analyses from borings SS-1 thru SS-5 at five
foot intervals for the upper 20 feet and every ten feet thereafter until the termination depth of
the borehole was reached. The samples were collected with a hand auger bucket for the upper
20 feet of samples and a slat auger for the 30 and 40 feet samples. The sampling procedure
was modified for borings SS-6, SS-8 thru SS-10. At these locations soil samples for chemical
analyses were collected using a slat auger at depths of 20, 30 and 40 feet for SS-6, and only
30 and 40 foot intervals for SS-8 thru SS-10. At each sampling interval, two 2-ounce voe
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 965-058/June, 1997 2-7
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containers were collected with a stainless steel spoon directly from either the slat auger or the
hand auger bucket. One of the VOC samples was submitted to the on-site analyst who used a
portable gas chromatograph (GC); the other sample was logged into FORMS, tagged, sealed
and transmitted to the SESD's analytical laboratory for verification. At the 5, 15, and 30 foot
intervals, additional aliquots of the sample were then placed in a glass pan and homogenized.
utilizing a quartering method prior to filling the individual sampling containers. These samples
were logged into FORMS, tagged, sealed and transmitted to SESD's analytical laboratory
where they were submitted for extractable organic and inorganic TCLJTAL analyses.
Soil samples for chemical analysis were collected from borings SPT-1, lW-14, MW-6,
and MW-10 at 10 foot intervals until auger refusal depth. These samples were collected using
decontaminated, stainless steel split-spoon samplers. Portions of each sample were placed in
a clean, 4-ounce glass jar for VOC analysis. The samples were tagged, sealed, and placed in
an ice-cooled laboratory container. The samples from SPT-1 and MW-6 were transferred to
SESD representatives for handling and analysis. The samples from locations lW-14 and MW-
10 were shipped to laboratories under the EPA Contract Laboratory Program (CLP).
2.4.2 Bedrock Investigations
Information concerning the top of bedrock profile at the _North Belmont PCE Site was
obtained during the installation of the top of bedrock temporary wells and the permanent
monitoring wells. During installation of four of the bedrock wells, the rock was cored with a 4-
. inch diameter bit in order to determine the fractures and rock quality designation (ROD) of the
rock. WESTON, in conjunction with Geophex, Ltd., conducted geophysical borehole logging in
monitor wells MW-14, MW-15, MW-17; MW-18, MW-20, and MW-21 (Figure 2-3). Due to an
excessive amount of sediment in the dpen borehole portion of the well, geophysical borehole
logs were not obtained ,in monitor well MW-17. The purpose of the borehole logging was to
define fractured bedrock locations, the horizontal and vertical orientation of fractures, the depth
to fractures, and the possible hydrologic activity associated with fractures in the bedrock. The
data generated from the study did help determine potential transport paths of contaminated
groundwater through subsurface materials. In order to complete the required logging, the
following geophysical functions were used:
•
•
•
Digital borehole acoustic televiewer
Mechanical caliper
Acoustic spectrum log, including transit time, signal amplitude, and variable
density si'gnature display
Natural gamma ray
Single point resistance
Temperature with differential temperature curve
North Belmont PCE Soe
Remedial Investigation
North Belmont, Gaston County. NC
SES□ Project No. 96S-058/June, 1997 2-8
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The functions were run consistently in the borehole until all logs were created.
Decontamination of the logging tools followed the procedures described in the subsequent
paragraphs. Each function of the geophysical tools is described in Table 2-4. Copies of
recorded logs are located in the borehole data sections of the Geophysical Borehole Logging
Report in Appendix A:
TABLE 2-4 GEOPHYSICAL BOREHOLE LOGGING TOOLS* UTILIZED AT THE NORTH BELMONT PCE SITE
Digital Borehole Primary investigative tool used for this investigation. The borehole televiewer is an acoustic imaging device
Aco11stic that scans the nterior of the borehole wall wi111 acoustic energy. Reflected energ'( is received by the device Telev,ewer and changes in signal amprrtude and signal travel times are lransmitted in digita format to the surface log recording computer. The borehole teleV10wer sen de (receiver) utilizes a rotating transducer revolving at 1 o
rps, witli a scan rate of 128 puises per revolution. In open nole environments, the transducer rotation is synchronized to magnetic north allow,ng the data recorded to be correlated to compass directions. Surface processiig of the digital data produces graphic images representing changes in the reflec~-of the materials
,w,osed on the borehole wai and sinullaneously variations of the signal travel times. Typica televiewer field data .is P.resented as a.depth orilented, magnetically keyed, gray scale graphic, displaying c anges in signal amplituaes and travel times.
Acoustic Spectrum Log
Relative Amplitude
Curve
Transit Time Curve
VOL Log
Mechanical Caliper
Electric Resistance
Fluid Flow and
Temperature
Natural Gamma
Ray
This log suite indudes data that is related to the acoustic properties of the materials exposed in the borehole.
This log records several acoustic properties simultaneously. These include: • Relatiye ,._,,,plitude <;:urve recorded in track one · • Transit Tll"118 Curve 111 track two
, • VDL or Signature Records in track three
This log is a measure of the amount of signal attenuation the acoustic signal has undergone as it passes
thr0!J9h the material surroundi:lg the borehoe. Each time the acoustic energy traverses an uiterface between rock and borehole fluid/ such as a fracture or other rock discontinuity, it loses a portion of its energy. The energy bsses are eviden on the relative amP.litude curve. Relative amp,itude recori:ls through a zone of rock
fracturing typicallv !ndicate significant signal attenuation, or in some cases loss of sufficient signals to cause loss of signal trac1mg.
This bg is used to calculate the material velocitv which also responds to borehole fractures. If the fracture is large enough to cause a significant reduction in the amplitude of the acoustic signal, the precision clock in the acoustic electronics will nol be able to track the first signal arrivais and then "time out" causing a "cycle skip"
on the transit time curve. These cycle s~s are good indicators of fractures. In scme cases, features or fractu'!' zones will be indicated by an apparent decrease in the recorded acoustic velocity.
This log is a graphic record of the acoustic signal waveform as received by the downhole sonde. These
records reflecl tlie actual form of the acoustic signal following a "Z' axis we processing and are useful in oentifvna areas of reduced signal strength and relaf10nships between the fraclure effects on the compression and shear portions of the waveform.
Mechanical calipers provide direct indications of fractures present in the borehole. Should the fracture have sufficient dimensions, the caliper curve will ndicate a distinct "kick our when the caliper arm passes into the o~ fracture. The resolution of the caliper to indicate features is a function of the fracture opening, the size of the caliper and the vertical scale of tlie bg data. .
Thesellogs have proven useful in identifying features in borings. Should the fracture be filled with borehole fuk'.:I., fonnaOOn f\Jici, or P9,5Sbly contaminated fluid, the point resistance curve may indicate a sharp excursion at tlie depth of the fracture.
These logs are useful in identifving the movement of fluids into or out of a well. In many cases this fluid
movement is directly related to features identified using the other logging functions.
Useful in the quafrtative borehole to borehole correlations necessary in the description of the site stratigraphy.
The gamma log is also useful in evaluating the degree of weathered and/or clay content of the subsurface fomiations. ·
Note: I*\ Information on lonnina tools and descriotion of uses courtesv of Geoohex, Ltd.
2.5 GROUNDWATER INVESTIGATIONS
' 2.5.1 Residential Drililking Water Wells
During the period.of March thru September 1996, forty-four(44) residential wells were
sampled in the vicinity of the North Belmont PCE Site to determine the water quality of the
residences drinking water. Six of the 44 wells were resampled due to the elevated levels of
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County. NC
SESD Project No. 96S-058/June. 1997 2-9
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~:!!":;,
.J,!'~ ~?-"4 .. :~;·.-.:
.,-:)}]
;:'.it1·
trichloroflouromethane detected in the initial sampling event; the quantitation limit for PCE, TCE ·;/
and cis-1,2 DCE were above the Federal MCLs. Generally, the drinking water sample was ' ··
collected at the spigot located at or near the well head or pump house and before the water
supply is introduced into any storage tanks or treatment units. If the sample was collected at a
point in the water line beyond a pressurization or holding tank, a sufficient volume of water was
purged to provide a complete exchange of fresh water into the tank and at the location where •
the sample was collected. All wells were purged for 15 minutes prior to sample collection. All
samples were collected,for VOC analyses with approximately 25 percent submitted for full
TCUTAL scan. Table 2-5 indicates the potable wells sampled as well as pertinent information
concerning each well (Figure 1-2 may be used as a cross-reference for lot/parcel numbers).
2.5.2 Temporary Monitoring Wells
Shallow Temporary Monitoring Wells. In June 1996, shallow temporary monitoring wells
were installed at the Site to define the shallow groundwater plume.arid to investigate possible
active source areas at the North Belmont PCE Site. Upon completion of the soil borings and
after the augers were r~moved, 2 inch stainless steel casing tipped with a 5 foot screen were
inserted into the borehole. Groundwater wa.s collected using a decontaminated teflon bailer
and poured into two preserved voe containers and one unpreserved voe container. The
unpreserved VOC sample was submitted to the onsite laboratory for immediate analysis. The
results from the portable GC provided information that was used by the project leader to place
subsequent wells. The two preserved VOC samples were logged into FORMS, tagged, sealed
. and then transported to SESD's analytical laboratory for verification analysis.
Top of Bedrock Temporary Monjtoring Wells. In July 1996, Weston drilled fifteen
temporary monitoring wells to top of bedrock. Subsequent sampling of the temporary wells was
used to design a permanent monitoririg well system to monitor both the movement of the plume
along the top of the bedrock interface and movement of the plume in the bedrock aquifer. After
a top of bedrock (deep) boring was completed to auger refusal depth, a decontaminated teflon
bailer was lowered to the bottom of the auger string within the inner annulus of the augers. A
bailer was used to collect a sample of the groundwater, which when brought to the surface and
slowly poured into two clean, 40 ml vials for VOC analysis. Groundwater samples were
collected from all borings except TW-1. At this location, during the drilling phase, the formation
backfilled the inner annulus of the augers a total of 50 feet preventing the collection of a
groundwater sample. All groundwater samples were tagged, sealed, and placed in ice-cooled
containers for transfer to SESD representatives for analysis. After transfer to SESD personnel,
the samples were submitted for onsite voe analysis with the portable GC.
After collection of the groundwater samples, the boreholes were then backfilled to land
surface with the soil cuttir:,gs. All remaining soil cuttings from borings/shallow temporary wells
installed by SESD were analyzed on site by the portable GC. No detectable volatile organics
were noted. Soils from the installation of TW-1, TW-2, TW-7 thru TW-10 were transported and
disposed of on the Parkdale Mills property. Soils from TW-3 through TW-6 were spread
around the borehole behind Ropers Shopping Center. All remaining soil cuttings from the soil
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 2-10
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TABLE 2-5. RESIDENTIAL DRINKING WATER WELLS FOR THE NORTH BELMONT PCE SITE.
-TATION~<~1}1i EASTINGl'.i\ NORTHING:: ioiicEOTo 11ARCEtt OWNER~lWiidft:t;;!jffJ',:,:\:?:,00 ADDRESSi.,;:•s.ci!$"' DAT~::"
"ll-XS-PW 1387006.48 560862.62 15-18 2.01 ROPER, WILLIAM &>1 Woodlawn Jun-96
"B-0:!3ieWicl!ic 1387C06'48'f; 5E0862:62i!ie': $15'J8~ :2:ot!isS':.0§ ROeER'sWl8:IMt:J:"'0SR"'"'•··c &llc\Noodlawn:::·-"""";, Mar-86~
8-C04-PW 1387376.98 560723.1 15-18 3.05 WALLS, HAROLD 505Woodlawn Mar-96
~i~P.1~Fk;;', .1386970:00t~ 58J6€6:CXlEE ~1~f8'=: 4:C~U~~ .WAttERS'~Eh:fEL'tf;Tifu~t"Ei~~ 251s:s0Ur11t1rv~;-:.t~~~T-Sebt~,"iJ~
"8-351-PW 1386700.CXJ 560698.CXJ 15-18 4.08 PENLEY, DELORES 2513 Boundan, Seot-96
8'312,eWslil!s ·1'.l90270'.18s1' 561512'.61!E§ ~15'18!c 12a~----:as f!'OPE=R"CiNAtOJi~.joi;ef:=f! :126,C""v'l:ii1•c'if!'Ffi!l::C UIJl>86'f~;lffi
B-312-PW 139J270.18 561512.61 15-18 12 POPE, RONALD 126 CNiv Ln Jun-96
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'-'B--011-PW 1388437.14 560161.29 15-18A 29 WHITE.STEVE 114Ro~r Mar-96
"8'046;el/\l,l'!t!l 1:J88639)33a!c 500329:31:'i!.~c c£l 5'f8A'" jj~~_;j flbf;'Fld)IJJ''A@cE'g:~ .... --~ ,10'fRMOr~~ Mar:-96""~
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'"8-355-PW 1389010.CXJ 560410.CXJ 15-18A 40 SMITH, ANGIE 2203Acme Seot-96
'"8-047'1;!\V~ '1380C€0:01§§¥ 560621c57!lit', 'ecj5'18A~ ;iii~ GRIEFITH."Dbf!N-'!E'~mt"c~!'P 2203'Acme~Tf;:'J!!f'is'a MaiCOO:':''slliF.!i'
'"B--013-PW 1389122.04 560497.41 15-18A 43 OLIVER, RAY 2205Acme Mar-96
"16-0J1~P.~'fr~ ,1339.1-22:~~K 58J491:"4t:8¾..~ ~fS:18A';: ~~i'.4Ir~~ -_oT~iVER~:RAY~XJJI£'-•!?5E -zis~cmi~'.:¥1~ '.a"~E--96'~
"B--014-PW 1389127.12 560620.78 15-18A 44 LEATHERMAN, JD =7 Acme Mar-96
"8'002::Rw* ,1389127!1:iitif 5a:)6;,Q"i78':iall!! El15'-'"f8A"°' ill~'a:l liEATHERtilANijD~oa,.; 2207!Acn-Z2J,.....c= Am:'96~
'-'B-356-PW 1389000.CXJ 560764.CXJ 15-18A 46 HEFTNER, JIMMIE =Acme Seot-96
i'ilQ'iolil.W~ 1~7,l"'4ill¥ ~;f2~ i'fil!l-::18Af!' 52.,j,~ WA"EL~c:.:iii!f ,ifilb-~~ ~=iBzlfflf~ ~
"B--017D-PW 1388643.92 560565.52 15-18A 58 BROOME, HESSIE 101 Ro= Mar-96
"8-01·7'.;F;!W~ 1388643)n~ 5605B552c~ %15-ifBAs' 58'~'al1\?'7l BR00ME'if!ESSIE!:~~,:~ .10!ER-=ril'oi'cctl§'t;a.1lli/: Mar-86:Si,,-~
'-'B--018-PW 1388536.41 560706.88 15-18A 61 FULL GOSPEL CHURCH 116 School Mar-96
"'S:019S=ll\/Vjj!j/ -1338639'41t!l:'1 5&>694,JB°mlic [tfs:,18/'i4 621:el:i!ifE:m fUJiK6!it!fAvi'i>~T#.l\.¥'i/L~ 1NS<:hlAA""'~~ Mar:es~
B--019-PW 1388639.41 5&>694.36 15-18A 62 FUJIKO, DAVID 114School Mar-96
•18-0ir,eWC\ilfill 1388588'97'£!¥ sa:i355.55illl:." <E15'.18A~ e;•,:~~ CbNNER~f'(ETCHER"~~ :,o<f•=-.r-,,:.~:dll:' Mar-00:~
'1B-al1-PW 1386678.11 560667.36 15-10A 78 BARNES, JD 2507 Boundan, Mar-96
JEJ-033'icW~.!lt 1388876:24~ 5Eif2'171fs~ lalfSo'.11.iil,;o oo.o~°'li! C:01:[ffiEz.JAMEs~ zn:l'Acme~~ Mar:°96~
"B--0335-PW 1388876.24 561247.18 15-18A 96.01 COLLETTE, JAMES 23:l:l Acme Mar-96
•18-034ew~ 1368921~·'l1~ SOCS82~15E 51S;1aA~ 99::c"ti~~~ C"c)NNER~!GtNti,it&180~~~E ;f04i8ctiool~ifrf~f;:f$~ ·Mar;.gekr"E,~
"B-352-PW 1389140.CXJ 561062.CXJ 15-18A 106 CENTERVIEW BAPTIST CH 23:xlAcme Sent-96
,;a,3:r7,~,w,:Ji!il 1~ffi9!!l' 56Tii:2!<\2i~f 'i':1 !;:;l 57,(i .1ooli,jj]i!c;~1 GRiNl5s"filtit,f B00EfBtit-k~;'is .1050'-0.mel~~f ~i:in,96~
"'B--048-PW 1389361.19 561272.42 15-18A 108 GRINDSTAFF, BOBBY 1050daniel Mar-96
•B-049'ew,:,,1fl 138914f'13h'" 561<!00'67:~ C,';jS:lSA"' .100.03"f"c.'§ MCMitliANS~SHIRtE'(,'af~~ Zl04'Acme?""al§~ Mai.:SS~~
"B-==Pw 1389-04.15 56146'.J.99 15-18A 110 CAGLE, THOMAS 115 O'Dariel Jun-96
:i~f?.Wi~~~ c1~:t3i~ se,m22~ ?:'f~18A~ ;r12":~~ .O!DAN"iEi::'.:"NE-ili.~~~~=~~ JOO~ti•oanief~~.i~tfil Jon;95::-=-:~
••B-311-PW 1389827.15 561521.92 15-18A 112.01 SPAGGS, HAZEL 119 CMV Ln Jun-96
"8'353cPWai,; 138900.J:ro•-m 561355:00:'.c"" ~15'J8A.:: f12:02s,:cfe UNDERVVOOD":KATHY1fil0 ,I~s,-J 123\Ttiomiis'Fite',,,3,aj]j, Seiii'96s'e:§lci'::
'B-CXJ3-PW 1389668.24 561196.33 15-18A 112.Cl3 BROOME, LARRY Dumont Ave Aor-96
~fB-031.:J?W;~}Fff! .13894(6~25-0'} 561°031:0Z~Jmf: /ihS:.1"8'A);f f14}if:i:f1f}J~dt MARtOWE:'FJ0AN}lfJEi:?FJ:;d-~ id.2:odanietmt,~~~~;EI 'Mar~E[._.:§i~\
"B--038-PW 1389371.12 5E0865.28 15-18A 116 AMIS, INC 2232Acme Mar-96
\1~:~wJ,:'"rn!I t:38931.1·:r. 12t~~~-5€08€6'.Z~f:;:i~•tl~ '.~i:1.1 s::1'aA:~ r1·6':::iJi11:s:':i,:tt GbRe.:-'AtJ~".:JJ.m:r:--:~~-1=Lt.2.:':::..:.~E 223Z'ACine5':.~s¥-uun::oo:;~~.:.:..;
"B-3'.l1-PW 1389346.34 560828.74 15-18A 118 LYNCH, KATHY 2228Acme Jun-96
~~l'W."c41f i:l89346:34 .. ~ si:til:ia!7~"~ t,s;:18A'~ 11 a;g,cg;,"' 1.:YNC:HcKAtl:fY'c=~-s.;;:,#c/,~'" 2228'Miiie\ii,Iii¥~,%' Mar::00"":C';;,i,
NB-357-PW 13892CXJ.CXJ 560636.CXJ 15-18A 119 PADGETT, LUCILLE =4Acme Seot-96
"B-040-Pw,,;:c.;F 1389237.46,e' 58'.l6S3:2sgs •:'1S:18A, 121'°''''."''''~ COBBiDIANNE.i'.,:00'\'''.c',; •,::,as 2216'Acme!;:'·•:ct ::::\ Mar-GS•r,'•'l''""'i'
"B--042-PW 1389245.22 56'.J5'10.31 15-18A 123 OLIVER. RAY WELL B 2208 Acme Mar-96
"B'D4HW' ·•;: 1389246.99 .. S&l536'i: ·,,,,,, .:•:1S-:i8A>11?1. ':,,, • OLIVER:':RA'i'..,:WECLA 'i'°:: ···: m•11i:me•,:,::L• ·. •.'\ Mar-96.'"'·''"·'''
'-'B-3:l3-PW 1389447.76 5&>525.7 15-1BA 125 KALE, TRISHA 201 Centerview Jun-96
NB-045'PW }i: 1390173.48. / 561210,05 c:.; :cJs:1ao;:, 142 .c,c '~' WATERS:'IMRY~cc,~:,;;,, f1amiomasFtte':'.crjFC Mar:SS•,:,_·•-ct·
''B-3'.J4-PW 1389442.27 560709.43 15-18A 127 MORGAN, FOREST 205 Centerview Jun-96
B-044-PW;S.ii::: 1389567:15.,J, 5607-27.35:'s~ i:i1S:18A•': 125;,_;5_;:,c; OLIVER··:MARY.FRANCIS .-,;_,-,c•,, 202.·centeiview::,;_;":;,~'0° Mar-86~;•,:C:f;;'f'
"B-359-PW 1389TTO.CXJ 560825.CXJ 15-18A 132 DUDLEY 113 Thomas Ftte Sent-96
"B-354-PW:,-y· 1389880.CXJ'" 561213:roc; '·15-18A;' 138 :oc:,:::,: SUTTON''DAVlD-. .-:,_,;;;::,·•,.·:: 121.:ThomasFrte'c't' Sent:96 .·,, ..
NB--045-PW 1390173.48 561210.05 15-18A 142 WATERS, MARY 118 Thomas Ftte Mar-96
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Proiect No. 96S-058/June, 1997 2-11
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-·---· . ·------... -··--.
I
borings installed by WESTON were containerized on-site and handled as described in the
Section 2.7 of the Field Investigation Report for the North Belmont PCE Site, Roy F. Weston,
Inc. February 1997.
2.5.3 Permanent Ground Water Monitoring Wells
Eight top of bedrock (MW-6 through MW-13) and nine bedrock monitoring wells (MW-14
through MW-22) were installed during the remedial investigation to determine the extent of
contamination associated with releases from the former Untz Dry Cleaners location. Nine of
the original sixteen residential wells which were converted to monitoring wells in 1991 were
modified to have concrete pads and locking well covers; the other seven were no longer
accessible due to vandalism of the wells. Figure 2-3 presents the location of all the monitoring
wells and Table 2-6 provides a summary of the location and purpose of each monitoring well
installed by WESTON in 1996. Well construction details for the top of bedrock and bedrock
· monitoring wells are presented in Tables 2-7 and 2-8, respectively, and monitoring well
construction specification diagrams and boring logs are presented in Appendix A.
Installation of Top-of-Bedrock Monitor Wells (MW-6 through MW-13). In July 1996, top-
of-bedrock monitoring wells MW-6 through MW-13 were installed using a CME-75 drilling rig
equipped with 8.75-inch outer diameter hollow stem augers. Soil cuttings from the drilling were
. used to create a geologic log of each borehole. Upon auger refusal at each cif the well
locations, the drilling was stopped and the monitoring well was constructed inside the augers
using 2-inch outer diameter flush threa.ded stainless steel casing and well screen (0.010-inch
slot size). The bottom of the screen vyas sealed with a stainless steel sediment sump. A
washed, graded sand was then tremied using potable water in the borehole annulus (the
trernied method is a positive displacement method where a 1" diameter pipe·is used to direct
the flow of materials into the well to prevent bridging of the material in the borehole annulus).
As the level of the filter pack rose, the auger and tremie pipe were gradually removed, and the
filter pack was emplaced to a level of 2 feet above the top of the screen. With the filter pack in
place, bentonite pellets were placed directly onto the sand using the tremie pipe to a thickness
of approximately 2 feet. Potable water and groundwater present in the borehole during the
placement of the sand was allowed to hydrate the pellets for approximately eight hows.
A cement/bentonite slurry used as a grout seal was then tremied on top of the bentonite
seal to a level of 1 foot below the ground surface. A flush-mounted manhole or protective cover
(depending upon the location of the well) was placed over the top of the well casing and
grouted into place within a three foot by three foot concrete pad. A lockable cap was then
placed on top of the well casing and secured with a padlock, and the manhole cover was
secured. For locations with a protective casing (MW-6, -8, -11, -12, and -13), the padlock was
placed on the outside of the cover and three protective barriers were placed around the
concrete pad in a roughly triangular shape. All top-of-bedrock wells are identified by a small
identification tag on either the inside of the manhole or on the outside of the protective casing.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County; NC
SESD Project No. 96S-058/June, 1997 2-12
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TABLE 2-6. LOCATION AND PURPOSE OF MONITOR WELLS FOR THE NORTH BELMONT PCE SITE
.yt§ll~ Bfiil1Rtli11t~~■il :r,NUMBER,ilil "".i:;;,~--.:r.i~='"·•~
MW-6 Top-of-bedrock well located immediately
adjacent to east side of Roper Building.
MW-7 Lot 115; comer of Centerview and O'Daniel
Streets:
MW-8 Lot 18; Parkdale Mills property; north of
Goshen Road.
MW-9 Lot 112; near comer of O'Daniel and Dumont
Streets.
MW-10 Lot 11; east of Acme Road; southeast of
Roper Building -0.3 miles.
MW-11 Lot 1 O; on North Belmont Elementary School
property; northwestern edge of property.
MW-12 Lot 1.02; northeast of Austin International and
Roper Building location.
MW-13 Lot 20; immediately west of Acme Road at
northern edge of stte.
MW-14 Immediately adjacent to eastern edge of
Roper Building.
MW-15 Lot 115; at comer of O'Daniel and Centerview
Streets.
MW-16 Lot 18; Parkdale Mills property; north of
Goshen Road. i
MW-17 Parkdale Mills property; extreme northeast
edge of stte.
MW-18 Lot 40; west of Acme Road.
MW-19 Lot 1 O; in northwest comer of North Belmont
Elementary School property.
MW-20 Lot 2; east of Woodiawn Road and west of
Roper Building.
MW-21 Lot 20; west of Acme Road; northern edge of
site.
MW-22 Lot 112; comer of O'Daniel and Dumont
Streets.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/Jun_e, 1997
~-:-~-ffi~~~ii:~~-m;~~~;2ji1pff,P:7~If*~Ji~7~2'~ ~"~~1e4".~-~iaU~eo~E"'o'~~-;tc~¥.-~1j ... m~::;;;:a:t, ~~ .... ~ ~ -_.,. -='-' .:tm•=--'
Provide top-of-bedrock aquifer monttoring data adjacent to
source k>cation.
Provide top-of-bedrock aquifer monttoring data near potential
source area of groundwater contamination.
Provide downgradient top-of-bedrock aquifer monttoring data
from position northeast of Roper Building.
Location at outer edge of potential groundwater plume
originamg from Roper Building. Monttor top-of-bedrock
aqutfer.
Monttor groundwater from top-of-bedrock aquifer near source
area A.
Monttor top-of-bedrock aquifer groundwater at a iateral
gradient position to Roper Building.
Monttor top-of-bedrock aquifer in a downgradient location
from Roper Building.
Monttor northern edge of potential top-of-bedrock aquifer
groundwater contaminant plume.
Monttor bedrock aquifer at location adjacent to source area A.
Monttor bedrock aquifer adjacent to potential groundwater
contamination source area.
Location provides bedrock aquifer data northeast of source
area A.
Provide bedrock aquifer data at furthest downgradient point to
site.
Provide bedrock aquifer data from position adjacent to source
area B.
Provide monttoring data on bedrock aquifer from iateral
gradient posttion to Roper Building.
Monttor bedrock aquifer in potential upgradient location to
source area A.
Provide bedrock aquifer monttoring data from potential
downgradient position and at northern edge of contaminant
plume.
Monttor bedrock aquifer in downgradient posttion.
2-13
------------------
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TABLE 2-7. SPECIFICATIONS FOR TOP-OF-BEDROCK MONITOR WELLS FOR NORTH BELMONT PCE SITE.
MW-7 118 106-116 104-116
MW-8 45 34-44 32-44
MW-9 74.5 64-74 62-74
MW-10 67 57-67 55-67
MW-11 73 63-73 61-73
MW-12 69 59-69 57-69
MW-13 41 31-41 29-41
Notes: All top-of-bedrock monrtor wells utilized stainless steel riser pipe and screen.
ft. bgs = feet below ground surface
ft. btoc = feet below top~f-casing
MW-14 8 128 4 144
MW-15 118 133
MW-16 69 · 83
MW-17 28.4 50
MW-18 10 139 6 161
MW-19 77 181
MW-20 105.5 122
MW-21 46 80
MW-22 75 92
102-104
30-32
60-62
53.55
59-61
55-57 -
27-29
Notes: All bedrock monrtor wells are open borehole from the bottom of the casing to the total drilled depth.
ft. bgs = feet below ground surface.
ft. btoc = feet below top~f-casing
27.33
25.30
31.95
32.55
31.93
23.51
3.05
31.58
27.20
21.41
8.56
27.51
30.21
34.35
2.65
30.77
Well development methods are described in subsequent paragraphs. All soil cuttings
were containerized on-site and handled as described in Section 2.7 of the Field Investigation
Report for the North Belmont PCE Site, Roy F. Weston, Inc. February 1997.
North Belmont PCE Srte
Remedial Investigation
North Belmont, Gaston County, NC
SES□ Project No. 96S-058/June, 1997
-
2-14
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lostallatjon of Bedrock Monitoring Wells /MW-14 through MW-22). In August and
September 1996, bedrock monitoring wells MW-14 through MW-22 were installed. The
proposed installation procedures for these wells instructed that each bedrock monitoring well
would be installed as a single cased well, where a carbon steel surface casing would be
installed but the remainder of the borehole would be left as an open borehole. The surface
casings would be installed through the saprolite and partially weathered rock zones and into
the top of bedrock to inhibit the migration of any overlying groundwater contamination into the
bedrock aquifer. The preferred methods of drilling the overburden were, in order, water rotary,
followed by air and then mud rotary techniques. Air rotary drilling techniques were attempted
on the first bedrock monitoring well location to be drilled; however, due to the rapid collapse of
the saprolite aquifer material into the borehole after the drill rods were removed, all surface
casings for bedrock wells would have to be installed using mud rotary techniques.
Each of the bedrock monitoring well borings was initiated using a 10-inch-diameter
tricone roller bit. This bit was used for installing a borehole through _saprolite and partially
weathered rock and into bedrock for the purpose of setting the surface casing. Drilling mud
was mixed fresh for each drilling location. The mud was composed of a bentonite powder and
potable water mixture and the drill rig operator controlled the viscosity of the drilling mud.
Potable water was provided from the City of Belmont Public Water Supply. The surface casing,
composed of either4-inch or 6-inch-diameter carbon steel, was then lowered into the borehole.
Four-inch-diameter casing was used in all borehole locations where the bedrock was cored
while 6-inch-diameter casing was used in all boreholes completed with standard air hammer
· drilling techniques. Once a surface casing had been set, a cement and bentonite grout slurry
was pumped under pressure through galvanized tremie pipe set within the inner annulus of the
casing and to the bottom of the casing: All cuttings and drilling fluids were pumped into a
mobile holding tank for subsequent discharge into an on-site fractionalization (frac) tank.
Residual handling is discussed in Section 2.7 of the Field Investigation Report for the North
Belmont PCE Site, Roy F. Weston, Inc. February 1997. After the grout had set for a minimum
of 24 hours, either a 6-inch-diameter (for wells completed by air hammer drilling) or a 4-inch-
diameter (for wells completed by coring) bit was used to complete the boring into-bedrock.
Drilling of the borehole was halted when a significant water bearing fracture was encountered.
To complete the surface portion of each well, a flush-mounted manhole was placed over
the top of the well casing and grouted into place. For monitoring wells MW-14, MW-16, MW-
17, and MW-21, an aboveground protective cover was used for surface completion. A lockable
cap was placed on top of the well casings and secured with a padlock and the manhole covers
secured. The padlock (in the case of wells MW-14, MW-16, MW-17, and MW-21) was placed
on the outside of the protective cover. All bedrock monitoring wells are identified by a number
on a faceplate which is either set within the manhole cover or on the protective cover. All
bedrock wells have a three foot by three foot concrete pad surrounding the manhole or the
protective cover. All wells with the protective cover are also completed with three steel pipe
barriers arranged in a roughly triangular shape around the pad.
North Belmont PCE Site
Remedial Investigation
North Belmont. Gaston County, NC
SESO Project No. 96S-058/June, 1997 2-15
--------------------------. ·-·---·
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Wei! Development. All permanent monitoring wells were developed using a submersible -<
pump. The development process continued until: 1) a minimum of five standing well borehole
volumes were removed/computed at an estimated 30% porosity for the annular volume
occupied by the saturated filter pack plus the full standing water volume inside the well casing;
2) the effluent was free of visible suspended solids as was practical; and 3) pH, temperature, .
and specific conductance parameters had stabilized. Parameters were considered stable when
three successive readings agreed to within 0.1 standard pH units, 0.5 degrees Centigrade, and
within 5% micromhos/cm conductivity, with at least 5% of a single development volume passing
between each successive measurement. Development was considered complete when the
water parameters had stabilized and/or five volumes of water had been completely removed.
All well development water was containerized on-site and disposed as described in the Section
2. 7 of the Field Investigation Report for the North Belmont PCE Site, Roy F. Weston, Inc.
February 1997.
Monitoring Well Purging and Sampling Operations. During October and November
1996, the 21 permanent monitoring wells (MW-1 was unable to be sampled due to blockage
from the plumbing of a bladder pump), and nine residential wells converted to monitoring wells
were sampled; locations are shown on Figure 2-3. All permanent monitoring well purging and
sampling was conducted in accordance to the EISOPQAM. Generally, three to five well -
volumes of water were purged from the monitoring well with either a submersible pump,
peristaltic pump (if water depth less than 25 feet) or bailer. The purge waters were monitored
for stabilization of pH, temperature, specific conductivity, and turbidity. Stabilization criteria are
• noted in Table 2-9. Field instruments utilized to measure these parameters were calibrated at
the beginning and end of each sampling day as per the EISOPQAM. Upon stabilization of'
parameters, the ground water sample was collected. The same device utilized for purging was
generally used for sampling; except for the submersible pumps which were not adapted for
sampling, in which case, the sample was collected either with a bailer or peristaltic pump. Prior
to using the submersible pumps which were adapted for sampling, equipment rinseate blanks
were collected to verify decontamination procedures. All samples except for six locations were
submitted for a full TCL/TAL chemical analyses to SESD's laboratory; the six wells sampled in
November were submitted for full TCL/TAL analysis by a CLP approved laboratory.
TABLE 2-9. WELL STABILIZATION CRITERIA FOR NORTH BELMONT PCE SITE.
Turbidity
Temperature
pH
Conductivity
DO
North Belmont PCE Site
Remedial Investigation
+/-10% (where turbidity> 10 NTU)
+t-1°c
+/-0.1
+/-3%
+/-10%
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 2-16
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·--'~ ·~Ai:
~·--t. Slug Tests. In January 1997, slug tests were conducted in all newly-installed monitoring ·c·
wells for the purpose of determining the hydraulic conductivity of the aquifer. The rising head
slug test method was used in each well to maintain consistency of method. This method
reduces the chances of compression of air within the screened zone. Equipment utilized during
the test included a bailer for removing a slug of water and an electronic data logger for
recording of the water level changes in the well. Depth to water measurements were collected
within each well prior to initiation of the slug test.
2.6 DECONTAMINATION PROCEDURES
During the soil boring/temporary well, monitoring well installation program, geophysical
logging and sampling activities, all down-hole drilling equipment (including augers, bits, rod,
split-spoons, etc.), stainless steel well casings, well screens, end caps, tremie pipes and
sampling equipment were decontaminated using the subsequent procedures:
1.
2.
3.
4.
A thorough potable water rinse and a wash and scrub with a solution of potable water
and phosphate-free detergent (Alconox);
Rinse with a high pressure, hot water sprayer delivering potable water, followed by a
thorough rinse with organic-free water;
Spray with reagent grade isopropanol and air dry. If the equipment was to be used
immediately after decontamination or if atmospheric conditions did not permit air-drying,
the equipment was thoroughly rinsed a second time with organic-free water;
Depending upon size, the equipment was wrapped in aluminum foil, placed inside a
plastic bag, or wrapped in clear plastic sheeting.
Organic-free water was produc~d from potable water from the City of Belmont Public
Water Supply, which was processed through an on-site water treatment unit. All residuals from
the decontamination process, including water and sediment, were contained on-site, and
disposed of as described in Section 2.7 of the Field Investigation Report for the North Belmont
PCE Site, Roy F. Weston, Inc. February 1997. All pumps, hoses, tubing, well sounders, and
other measuring instruments were also decontaminated without the use of isopropanol.
Instead, each instrument, tubing, hose, or pump was rinsed twice with organic-free water.
I 2.7 QUALITY ASSURANCE/QUALITY CONTROL
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All samples collected during the investigation were in accordance to the EISOPQAM and
the Remedial Investigation/Feasibility Study Work Plan, North Belmont, Gaston County, North
Carolina, June 1996. The quality assurance and quality control (QA/QC) procedures described
in these manuals insured collection of representative samples from the various media at the
Site. The various QA/QC samples collected at the Site are noted in Table 2-10.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 2-17
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····---· --··-----. -----~--~--
\
. TABLE 2 10 QUALITY CONTROUQUAUTY ASSURANCE SAMPLES COLLECTED AT THE NORTH BELMONT PCE SITE
,"''"cwcit~''"" ~AMEtffl r&lillri!liff!.~11!9Jllll~~~~~-lllflliB~~~~
Field a sample that is prepared in the field to evaluate the potential for contamination of a sample by site contaminants
from a source not associated with the sample collected. Field bianks should be collected in dusty environments
and/or from areas where volatile organic contamination is present in the atmosphere and originating from a
· source other than the source being sampled.
Trip a sample which is prepared prior to the sampling event in the actual container and is stored with the investigative
samples throughout the sampling event Trip blanks are used to determine~ samples were contaminated during
storage and/or transportation back to the laboratory (a measure of sample handling variability resulting in positive
bias in contaminant concentration).
Water sample of water from local water supplies used for decontamination procedures and collected to measure any
Source positive bias from sample handling variability.
Organic sample collected from a field organic/analyte free water generating system. The purpose of the organic/analyte
Free free water blank is to measure positive bias from sample handling variability due to possible localized
System contamination of the organic/analyte free water generating system or contamination introduced to the sample
containers during storage at the site.
Equipment a sample collected using organic-free water which has been run over/through sample collection equipment
Rinseate These samples are used to determine ~ contaminants have been introduced by contact of the sample medium
with sampling equipment Equipment field blanks are often associated with collecting rinse blanks of equipment
that has been field cleaned
Preservative a sample thai is prepared in the f,eld and used to determine ~ the preservative used during f,eld operations was
contaminated, thereby causing a positive bias in the contaminant concentration.
Split a sample which has been portioned into two or more containers from a single sample container or sample mixing
container. The primary purpose of a split sample is to measure sample handling variability.
Duplicate or two or more samples collected from a common source. The purpose of a duplicate sample is to estimate the
Co-located variability of a given characteristic or contaminant associated with a population.
2.8
I
DEMOGRAPHICS, LAND AND WATER USE
A residential well survey was performed by Weston during September and October,
1995. A door to door survey and records search was conducted for the study area shown on
Figure 1-2. Information gathered by the door to door survey included existing wells, well use,
well depth, age and access for potential well sampling activities. The records research
included reviewing the city water bills for areas supplied with municipal water.
2.9 ECOLOGICALSURVEY
A bioassessment was conducted during July 1996 of the "unnamed tributary-A" adjacent
to the Site. Study objectives were to (1) characterize the benthic macroinvertebrate community
of the tributary and an established reference stream (Dutchmans Creek) near Mount Holly,
N.C., (2) evaluate the quality of the stream habitat at all sites using the Rapid Bioassessment
Methodology (EPA, 1989), and (3) conduct in-situ physicochemical measurements at all sites.
Completion of these study objectives showed that the stream was not affected by the Site.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June. 1997 2-18
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The headwaters of the unnamed tributary adjacent to the Site are located less than 1000' northwest of the railroad crossing at Goshen Grove (see Figure 2-5). The unnamed tributary flows through an urbanized area for approximately one mile and then joins another unnamed
tributary prior to its confluence with Fites Creek (Figure· 2-5). Due to their proximity to urban
areas, both unnamed tributaries and their floodplains have been subjected to environmental
degradation. Past studies by the North Carolina Department of Environment, Health, and Natural Resources (NCDEHNR;1974-75 & 1986) found poor water quality due to urban runoff in .the unnamed tributary that joins Fites Creek northec1st of North Belm_ont.
Sampling stations in the unnamed tributary adjacent to the Site were located near the
headwaters at the railroad crossing (UT-1), proximal to the Site (UT-1A), and downstream of the Site at the railroad crossing and just before the confluence with the unnamed tributary to Fites Creek (Figure 2·5). Discussions with NCDEHNR indicated a suitable reference site,
Dutchmans Creek, existed near Mount Holly, N.C. Reference sites are minimally impacted
sites and serve to provide insight into biological potential for an area and allow comparison to other sites to determine if impacts exist and the severity of those impacts. Dutch mans Creek
(DC-1) was sampled at SR 1918 (Sandy Ford Road) north of Mount Holly (See Figure 2-6).
·'
Rapid Bioassessment Ill-Methods. Benthic macroinvertebrates provide an indication to water quality and detect environmental perturbations due to introduced pollutants. Due to their
limited mobility and relatively long life span, the benthic macroinvertebrate community is a reflection of water quality conditions over time. The Rapid Bioassessment Protocols (EPA, · 1989) were followed for benthic macroinvertebrate collection, habitat evaluation, and in-situ
physicochemical measurements at all sampling sites. Benthic macroinvertebrate collection
involved a multi-habitat sampling effort (rocks, snags, root bank, and stream bottom). Habitat parameters, relating to substrate and instream cover, channel morphology, and riparian and bank cover, are evaluated or scored. Habitat, as affected by instream and surrounding
topography, is a major factor in the development of a stream biological community. In
conjunction with the benthic macroinvertebrate sampling and habitat evaluations, in-situ
physicochemical measurements of water temperature, pH, conductivity, and dissolved oxygen
were recorded at each station. Field instruments utilized to measure these parameters were
calibrated at the beginning and end of each sampling day as per the EISOPQAM.
North Belmont PCE Site
Remedial Investigation
North Belmont. Gaston County, NC
SESD Pruject No. 96S-058/June, 1997 2-19
--- ---- -
N
t
•,s, SAIVIPLI: LOCATION
7~( SITE LOCATION
llillll --- - - -
FIGURE 2-6 BIOASSESSMENT SITES, UNNAMED TRIBUTARY-A
REMEDIAL INVESTIGATION REPORT·
NORTH BELMONT PCE SUPERFUND SITE
_ NORTH BELMONT, GASTON COUNTY, NC
--- -
NOTTO SCALE
-------------------
RE r<a11Jc111 U1l{B
SOURCE: DoLORME MAP EXPERT
,,;; SAIVIPLE LOCATION
FIGURE 2-6 REFERENCE SITE, DUTCHMANS CREEi<
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPER FUND SITE
NORTH BELMONT, GASTON COUNTY, NC
NOTTO SCALE
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3.0 PHYSICAL CHARACTERISTICS
3.1 SURFACE FEATURES
Gaston County, North Carolina lies in the central portion of the Piedmont Physiographic Province between the Appalachian Mountains to the west and the Atlantic Coastal Plain to the east. The Piedmont is primarily characterized as rolling uplands although the county's western area contains some northeast trending ridges. The elevation of the Source Area A is approximately 760 feet above mean sea level (msl), and the elevation of Source Area B is approximately 730 feet msl. The elevations within a one-mile radius of the Site range from 600 to 800 feet above msl. The topography.p¼tl1El,_sJtEl)s composed of low ridges accentuated by numerous small stream valleys. In g(:ln.i:ir#lfAtH~:#~pogrclphic changes are gradual, except for occasional steep-sided stream vaUeys§;'lSpedfically;{the':site topography is dominated by a ridgeline on the western half of1fi'~;'$Yt~i%TifWitoht\'.e'r.;Q~}i).ry Cleaning facility, located within -,.;.,j .. •. ~· ,••'"'-· J;,,~ .. ,_. ''.·,-~-,, ,., • ._.·_ ..... the present Roper Shopping Cei;itet!1wa'S: located aloi:i~fthe'{Center of the ridgeline. East of this ridgeline, the topography is do'ffifqateJ;1;_t,1y,slopes,fr~'d1i;t'~ifi:6m the southwest to the northeast towards a small tributary of Files Creek (unnamed tributary "A") that has headwaters adjacent
to the Roper location. The un813,!Il!:!9JFiJ?\JJ,afYfli§~ al91}g,tt:ig,northem edge of the Site and flows to the east. Site topography alb"i;ig)}be:,[a§t~fefiper:fm~ter,)~)also affected by the presence of another small stream aibngthe e3ctremel~'astemJidgefo(ttie Site/This stream, which is also an "'.. . . ,(.' _.,,., .. ' .,. . ;.:. ,,. ' c .. ~-,·!~'-.--·' --·--: ,' :-,:' :;:,.-." ,., ..•. -_.. . . unnamed tributary of Eites Cree~ (uhriiil)1e"!:iltr.ibf;it;:ipy,1B,'), flows northeast and into the aforementioned strearri: West oflhe'rTdg'~iin~'ittiehopography slopes to the west and eventually . towards another stream further to the wesCThe general topographic relief over the Site is presented in Figure 3-1.
Source Area A, Source.Area A1 consists of the former Untz's dry cleaning operation located in Roper's Sh~pping Center. ln-1991, the "Site" also included 25 single family homes, a church, and an eleme'ntary school whose wells have been contaminated with PCE. The shopping center includes Roper's'Furniture Store, Jericho Baptist Church and a cabinet manufacturing shop. The former Untz Dry Cleaners is believed to be the source of the groundwater contamination. The former Untz Dry Cleaner facility is approximately 0.75 acres in size and is bounded to the east and west by residential neighborhoods; to the north by a cemetary and an undeveloped wooded tract; and to the south by North Belmont Elementary School.
Two mobile homes are located on the property in the back of the shopping center, each occupied by one tenant. There is a buried septic tank behind the shopping center building,
near the mobile homes. A flea market is held on the lawn between the shopping center and the elementary school five days per week. The shopping center is fenced along the southern boundary. The eastern portion of the shopping center is covered with an asphalt parking lot, and the western portion is covered with soil and grass. The terrain is relatively flat with a
North Belmont PCE Site
Remed'ial lnvest'igation
North Belmont, Gaston County, NC
SES□ Project No. 96S-058/June, 1997 3-1
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' .. • ~ ::·s-~·,. . . · ... frC11:--·;. ...·~.t· .~ :~.
_#._~·
·ti
"si:•~
,-...:_ -·:::~ .. ._.,,
'·· .. ,, ---·~ ·. _ tS;"'-=;,e•"l'=c·•"' .. ,""f.,,,li~=•: ..¥~-,,~._l.,,,Jd.f!P.lghv, C • ::'.~--~~; .,,~~~ .. "~~¢~~-~;~i~~" · / Scb
.-t· ~-~?b ..
. __ ,,., .
• '-------
'• ··---
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::"•·.-?
: ,·::·'
.~· . .. i· .
:/J.{ ~,,,._ ..
·. ~ ·1"/'i·'•''"''"·1rii · . .'~'Tfl"J: . _,
SCURC2: USGS MOUNT HCLL'!. NC TOPCGR;\PHIC ;,,1A? SL!AD?3,MGL::, SC:l.L'.= 1 :~4GOO, QAT2: 197,)
s,;rvJPLJNG 3CUND.1-.RY
-3UILDINGS
1s\EPA
?iGUR:= 3-~. TOPOGR,:\PHIC 1\11?.P
REi\JlEDLQ..L !i'JVE-STiGAJION RE?O~T
NORTi-1 BEU,10NT :C:CE SUPE:'/FU~iD Si:~
NORTH 8EcMONT, GA.STO~I COUNTY, NORTH CA.;'<OU1\i,\
SESD PRC!JECT Ne. 96S-OSa, JUNE 1997
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gentle slope toward ihe northeast to an unnamed tributary of Files Creek. An interview with a
local resident revealed that drainage from the reclaimation operations at the dry cleaners
drained from the northeast corner of the dry cleaning facility along the northern property
boundary in a northeasterly direction.
Source Area 8. Source Area B consists of a previous dry cleaning facility located at the
northeastern corner of Acme Street and Suggs Road. This parcel has been converted to
residential property. The majority of the area surrounding Source Area B is residential with a
few small businesses. A cabinet shop is located to the North. Source Area B has been graded
level with a slight drainage feature sloping from the southwest to the northeast. This feature
eventually slopes towards the unnamed tributary to Fites Creek.
. -~ :1?:X~{\/t[fi.f~f.}~:.~:.-.·:{~·?:·.:'.'.-;:: ·.
In addition, a previous refriger,a\cif/13paii';sho1iand a machine shop were also suspected
to be potential sources of conta,rijJ.~%til$1f('fh'irrWifrig~fat§(repair shop is located at the
intersection of Julia Street and,<J'\cme\fRoad in landifof)15'!;18A parcel #32. This is a small
commercial strip area with resi~~~ff.~\f~(~eerty su~9'g;~§,(61f;(pe Site, except for a cabinet shop
and a well drilling company located to the east. The machine shop is located at the corner of
Acme and Centerview Roads and is.encompassed byresidehtial neighborhoods.
3.2 METEOROLO~Y •·• .. :~tf ia;,1~;!~''• •.
· The climatological data shown,ih/Filbl~~;i1;:tprCharlotte, North Carolina is
. representative of the climate in Belmont a'rrl'lt'~hhe Site: The climate is moderate with
approximately one half of the winter days falling below freezing.C'Liltle snow falls and the
occasional heavy snow usually melts 'Within one or two days. ,The average freeze-free period is . . I . . ·.
216 days. The summers are warm with temperatures into the 90°F range. ,•;· _' . : ., ... . .
TABLE 3-1 CLIMATOLOGICAlDATAFORCHARLOTTE•NORTH CAROLINA:" •• · ' ·'··' .. ·. •.,::, <;;:s,: ::-'J~n::..:,;:: . ··-.' . .-·Mart ;,.,;;., .'.},,r;v:·~ "'.'j(J/19 :-I -·Jutv. ;·A, ..... . :Seat-·Oct-• Nov:.· .. Doc;· Y8ar ··Feb•
Daily Max ( "F) 50.3 53.6 61.6 72.1 79.1 85.2 88.3 87.6 81.7 71.7 61.7 52.6 70.5 Avg
Daily Min ("F) ':!JJ.7 32.1 39.1 '18.4 Sl.2 64.7 68.7 68.2 62.3 49.6 39.7 32.6 49.4 Avg
Tola/ Precip;taffon 3.80 3.81 4.83 3.27 3.64 3.Sl 3.92 3.75 3.59 2.72 2.86 3.40 3.6 Avg
On/ mon
Max 24hr 3.57 2.92 3.83 3.2 3.67 3.77 3.CXJ 4.52 4.74 5.34 3.27 2.87 5.34 Max Precipitation (in)
,\,Ind Speed 25 32 29 29 25 ':!JJ
(mph)'
23 37 29 37 ':!JJ 35 37 Max
Prevaillng vWnd SW NE SW s SW SW SW s NE NNE SSW SW SW Avg Diiectionc
•National Climatic Data Center, 1987. ·Local Climatological Data Annual Summary wnh Comparative Data Char1otte North Carolina~ National
Environmental Satellite Data and Information Service, National Oceanic and Atmospheric Administration, Department of Commerce. Normals, Means
and Extremes 1951-1Sl80. r.a year record
cPrevailinq direction throuQh 1951-1963.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-3
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3.3 SURFACE-WATER HYDROLOGY
The Site is located between the Catawba River and the South Fork of the Catawba
River. Gaston County is drained by the Catawba River, which flows north to south and forms
the east boundary of Gaston County. Surface water drainage from the Site is to an intermittent
creek (unnamed tributary "A") located approximately 1000 feet to the north. The intermittent
creek flows 0.5 miles east and joins another intermittent creek (unnamed tributary "B") to form
an unnamed perennial stream. The unnamed stream continues approximately 0.75 miles· to the
confluence with Files Creek. · The surface water pathway continues along Files Creek
approximately 1.5 miles where it merges with the Catawba River (See Figure 3-2). The
Catawba River is classified as WS-111 byJh,~,-~~CTD, Carolina Water Quality Standards. These
standards are established under t~_El;,~t~h;~~£~\fJ:i)3t1~~inistrative Code (Tille 15, Chapter 2,
Subchapter 2B). The code estab!1!:lbe.l!fC::laS§~${0f;fre"shwaters based on discharges to the
water body and its quality. ChemL~(fqw'.~1ity"~fifnlii~'.t.~§ff9,r'surface waters are also established
under the Code (Section 2B.02j~1,jj~l9w rates in'~if~'$}¢f~~k near Catawba Heights were ,-,,;.•,.•••.•,•• •,1;,;J;,•~:•<<-"1,,••· •"•'-'•r ~-< •••.•-',•-~• • '•
calcula~ed to be 4.6 cubic feet)j?,~!2~Q£Q~Jcfs). }It;l~U~Y~f?Qe flow rate along the Catawba
River at US 85 near Belmont is 2,109 cfs.
\ ,'.:':-;,. , '.~t ).·
3.4 GEOLOGY :\:?!\:'· . · .. ·.· .... '(~~;t:~'~:;~g~{~l1::1~J:~!u~\~1r:· . . . . .
The Site is located wilhiq the}S§t';\!(~f;\RQ~ig_ri\i:l!f!flie'Charlotte Belt of North Carolina. The
rock types that underlieJhis terrain ii!"rei@§,CTi)fi§it~ditjy.;gr(;!nitic type rocks, metavolcanics, and
· gneisses and schists ofvarying types. Ther'ock1ypes are of varying metamorphic grade and
all rock units Ire, 1d paralleL'Nith the ~trike of lbe Appalachian Mountains, which is typically
northeast to southwest. These_ same linits typically.dip to the southeast along with the regional
topographic trend. StructuraUy;Jhe ate'a is co,mpleXwith rock units displaying one or two types
of metamorphism or'strt:1ctufa1:'91aqge_s,. such\as falJlting):ir folding, A large, unnamed fault is
located approximately six rililes" tothfy,-est .pf the Site: {
According to the Geologic Map of North Carolina (1985), the Site is underlain by foliated
to massive metamorphosed quartz diorite and massive to weakly foliated, hornblende rich
granitic type rock. These rock units have undergone periods of deformation that have
produced folding and fracture planes in the rock, as well as brittle zones where the rock is
actually crushed, sheared, or faulted in some manner. As these rock types become weathered,
soil profiles develop !_hat are characteristic of the original rock (also referred to as saprolite).
For example, the grai:iite rock tends to weather to a clay rich loam or a dry rich sand, especially .
with depth. The sand originates from quartz content within the original parent rock; in some
cases, larger grains qf quartz sand can be found in the saprolite. As described above, the
bedrock types have been fractured during metamorphic phases and, in some cases, the
fracture places have been "resealed" by quartz. As the rock weathers, these quartz fillings are
retained in the soil indicating that fractures existed in the rock. In addition, remnant fractures
can be seen in the soil profile without quartz infilling as indicated by the presence of iron
staining along the fracture plane. The iron staining, which is also referred to as the mineral
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-4
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NEAREST
c\ 7' FISHERY . ~s I
PIEDMONT NORTHERN RR
"-,.. UNNAMED TRIBUTARY "A"
2
NEAR~ST
WETU\ND
/
' .. -·.
//➔ UNNAMED TRIBUTARY "B"
NORTH BELMONT PCE SITE
i.
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SOURCE: SITE INSPECTION REPOR'T. ~IORTH BELMONT PCE SITc, NCO9e6 187 128. GA.STON COUi'IT"(, NORTH SELMOi'ff, i'JORTH CAF!OLli'IA. SUPERFUi'IO SECTION. i'JCOEHi'IR. JUL'( 1993.
FiG-UR.E 3-:2 SURr"i~.CE \NATER ?ATHVV,~:y
REMEDIAL li'IVESTIG.~TIOi'i RE?QRT
NORTH BELMO1'IT PCE SUPER:=Ui'ID SITE
NORTH BELMONT G,c,,,STOi'i COUNTY, i'iC
SESD PROJECT Ne. 96S-058, JUNE 1997
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limonite, is a result of groundwater leaching iron from the surrounding material, and as the
groundwater travels along a fracture plane, the iron is being redeposited along the plane.
Fracture planes were also detected during drilling as zones of weak to incompetent rock that
were not resistant to the cutting action of the drill bit These fracture zones, or secondary
porosity features, were typically saturated. ·
During the field activities, the soil profile varied with each location; however, a common
pattern was observed. From top to bottom, the materials consist of a saprolite layer, a partially
weathered rock zone, and the underlying fractured crystalline bedrock. The saprolite is clay-
rich, residual material derived from in-place weathering of bedrock. Typically, the saprolite is
silty clay near the surface. With increasir:ig,9~P!.h, the amount of mica, silt, and fine-grained
sand and gravel tend to increase. fs.~Ei:!~~'.H§'f.niic:ty's~iBt?nes with quartz infilling appear in this
layer. The saprolite zone is thick~itf(aPP.l'.9Xirri"ately1'1~q\feet) along the ridgeline on the
western edge of the Site, thinnir:i§~~~!\lis1he'i6@riel.~Y.~uons or stream valleys to
approximately 30 feet in thickn§~~1fJF.fg.u'.fes 3-3 t½tii}Foig~'.fes 3--6 present geologic cross-
sections along various locatioits/~?gµqc!l!be Site.JJ_q4~iJY!Q9\the saprolite is a partially
weathered rock layer derived froin'tfieweathering'of becfr6ck that ranges in thickness from
approximately 10 to 50 feet. 'Fhis layercis composedfotsap[6lite and fragments of weathered .:•:-".,.\::':•:/"~" :· ,-·;_,-. --~-,: ',<;!, •_,, •• ~.;,~_,; ·:-.. ;: • •. '." ;,r,:: . -.. ,·:·. •,·,:1-s·o:~, :··· , ·.,,.-"
bedrock. Particle sizei;,,range fr,_9qj_½si1fafa1\d~c;Jcfy'.~!.t0;Jaj:g§bbulders of unweathered bedrock.
; •' • •• -•~,' ' ', ,>••--~.'. o;..:,'/!.,;.,> lr.~''•~-, ••'-.7 C.-":-:,:• •,-(-. • ,;•" '."",• •:< <•• :,, ''·>-e ,,, :i -•" •• The weathering occurs in:9~drcigg:~9rjes,;li'l"$,s{r~$i\;tgqm:<:>Jphysicaicand chemical degradation . ' .. ,, . .., -,..,,,.--:,:·--('1-<<·•;:,---,~----•-,.·,,·1;•,••,,•';.,J•.'•• .. ,c (i.e., fault zones, stress relieffractufe~f~?iidi'ffii_11~r13.[qgicj-zones). ·-·-.... -----, ·-•:\:~~x~:t}0}~J:~W)i/{tn.u:: >~ .•:-; .
The predominant rock typesi:basea·on:fock cores obtained during bedrock monitoring
well drilling, appear to be metamorphosed quartz diorite and metamorphosed granite or granitic
gneiss. The bedrock is fractured and these fractures contain q°i:,artz deposits that remain
unweathered in the saproliJe. Therodk quality designation (RQD) which is the measure of the
quality of a rock massranged froin Oto 45 percent; ROD:values less than 50 percent indicate
very poor to poor rock ancfg~nei-ally high in fractures. 'Figure 3~7 depicts the top of bedrock
contours developed from the information ccint_ained in Table 3-2.
I 3.5 HYDROGEOLOGY
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Regionally, the water bearing units that underlie the Site and surrounding areas
represent an aquifer system consisting of metamorphosed and fractured quartz di6rite and
granitic type rocks in varying proportions and thicknesses. Geologic structures that produce
high-yielding wells include contact zones of multi layered rock units, zones of fracture
concentration, and stress-relief fracture zones. According to LeGrand and Mundorff (1952),
wells in Gaston County that are set within granite have an average depth of 165 feet and an
average yield of 18 gallons per minute. Within this area, LeGrand and Mundorff indicate that
well depths range from 85 to over 1,000 feet and that well yields range from 2.5 to 116 gallons
per minute. The aquifor system underlying the Site generally consists of the saprolite/partially
weathered rock aquifer and the underlying bedrock aquifer; however, interconnection between
these units is likely wh
0
ich would influence contaminant transport.
North Belmont PCE Sne
Remedial Investigation
North Belmont Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-6
--------
£ECIIC.:i UIIE tuC11ll01l
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CROSS-SECTION BASE MAP
~EPA FIGURE 3-3
CROSS-SECTION BASE MAP, AUGUST I 9%
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNTY, l~C
SESD PROJECT No. 96S-058, JUNE 1997
- -- -
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LEGEND
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SOUIIC£: fl[lf) VMSnc ... nou ll[PORT, uonn1 IIEUIOUT PC[ SIJf'OlfUUO SITE. CASTOJI COUIITY, orucom. UOlllll CAAOUII,\ IIOY F. li(STOII, UIC .. FEBRUAAY 11101.
&EPA FIGURE 3-4
GEOLOGIC CROSS-SECTION A-A', AUG 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
~~~bH p~ZJ~1gf\10GA~~~~D~~~1~1JNE"T 997
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~EPA FIGURE 3-5
GEOLOGIC CROSS-SECTION 8-8', AUG 1996
REMEDIAL INVESTIGATION REPORT .
NORTH BELMONT PCE SUPERFUND SITE NORTH BELMONT, GASTON COUNlY l~C
SESD PROJECT No. 96S-058, JUNE 1997
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!'Q TOP Of a .,.,m •~~
G,.. {eonou [l(VAllOtl OF SUMAC( CASIUO (fHT AEIOY( IJUU SO, l(\;(l)
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SOURCE: flliO IINESIKIATIOJI RfPOIII, IIORTit DEUloJtll PC[ SIJl'E.llfl.lUO S.IIE. CASTOU COUUIY, (l{UIOUI, 1100111 CAAOl.111>,. ROY r. WESlc»t UlC., fEBSll.Wt'I' )Q"7. ,----------------------------------•-·---
OOEPA FIGURE 3-6
GEOLOGIC CROSS SECTION c-c·, AUG 1996
REMEDIAL INVESTIGATIO~I REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUls/lY, NC
SESD PROJECT No. 96S-058, JUNE 1997
--
562000
561500
561000
560500
560000
559500
--
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. I
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-------~~•----~~------L _____ J
MW-21 .,,
MW-1 "
.-··(-····-::_~· c~ : :]--: _-1--\,:-lw ----;;:=-.C,,,,-c. ·-:/N {~r..~-;, ;,,-:.----//. -__ )! ---. 111· ---Mw,-::::: \ ~L--.. --\\,' _,i,f ,,o:,';_,-,_.J•J--J ---\ ;1i•
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-., -l \ -( _ ... --,:l _.,.,,. / .. Y ,.·. ,:"' :' /: ~-·>-· __ --·;,•fi
,, MW4 ....-:d~lyt,:1~•/----...-, , /\ .. ,.' ,I t glf--1 t•M 15 \-\ __ /
/ • . • ( " • M ,/4"1'• -CW1 ~ 3 '\ , -~< \ ·· >\< / \ \ __ ·"/' , ' / -f <ta . ,,. \ \ --\ ' ' \ \ __ \ ,,. \ --,; I . .,._ , I>, __ \ tiw, ,\ \ ·. · <./ '.\" /_;)-;;: jtf
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'\\~ ' . --,11 ;
MW-1 LOTHU!v1BEn1MOf\/ffORU\JGWELL. .', .,r ,-/ ---_I,/ 1·
SAh\PLI: LOC/\TIOM .. · 11/ -;"/:: :.~~.::-.:_-____ 0: .'--, N , /! ,11 .m,: ( I
I 1386500 1387000
·--7
1387500 1388000
I
···-T--
1388500 1389000
EASTING, feet
1389500 I 1390000
·r
1390500
EPA
FIGURE 3-7 TOP OF BEDROCI< CONTOURS, AUGUST 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNTY, NC
cccn CPI"', u::f'T ~1 ... l'l.AC-(\CQ II U,IC 1nn"7
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1391000
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TABLE 3-2 TOP OF BEDROCK ELEVATIONS FOR THE NORTH BELMONT PCE SITE ..
•! ~TATION EASTING · .. .":•:;.,' NORTHING .. : TOG.ELEV' .fl: rilsl TOTAL DEPTH. ft TOP OF ROCK ft ROCK ELEV:'•
MW-1 1387833.98 560966 .. 36 739 .. 88 112 112 627 .. 88 MW-2 1387895.55 561140.41 734.18 89 89 645.18 MW-3 1387895.55 561150.41 734.18 150 89 645.18 MW-4 1387530.12 560938.87 743.74 82 82 661 .. 74 "W-5 1388416.24 560690 .. 37 727 .. 22 113 113 614 .. 22 MW-6 1387857.53 560897.83 745.65 128 .. 96 128.96 616 .. 69 'IIW-7 1389374.2 560964 .. 95 717.95 115 115 602.95 ViW-8 1388158.44 561530.6 711.6 46.3 46.3 665.3
ViW-9 1389506.65 561364.34 704.24 74 74 630.24 MW-10 1389197.43 560407.79 732.1 =·•-,-..... 67.3 67 .. 3 664.8 Mw-11 1387760.65 S60529.34 •J -~L~i4:fO:f~\:.f~~\(\ ;}?:·:.,,_ 74 .. 9 74 .. 9 668.13
""W-12 1387700.56 S61435.07 , r:":t]~·gu\72i\1S;&1f/;~, !>•.;·",''"· 70.4 70.4 656 .. 75
••W-13 1388892 .. 9 561831 .. 5 ,:, t.1JJ:,1t::.~·sasrss.►:~tih~/ {;t,\i;i;.~-~44.4 44.4 644 .. 93 MVll.14 1387840.6 560842.27'0):/f; _;·:;·,,:~-1,,·;..,~----'•" -~r!i'1:f,;t,.;::Z43. 71 ·-1, /f!{?i~~145.8 128 615.71 MVll.15 1389425.53 560996 .. 1 ,t;:(jf;,? -;:,:;=-;;.,h•:.:t,,¼7:11 .32 I f;;J.t\\i§t~~ 40 118 599 .. 32
MW-16 1388139.8 561495.2id~,A li.'t.J~L!i4:":7,14. 36 .[,::,_>; .:-.. i:.rt\;r::;:;n:s 69 645 .. 36
""W-17 1389834 .. 91 561810.48 ' 666.87 50 28.4 638.47
MW-18 1389063.46 560547.08;, ... , __ ,,.j,:',/.~-0~:-.?2s.i1it_~•.,-.,· :' _\~~::..:--:, . , .. .161 139 589 .. 7
MW-19 1387790 .. 53'.<ci 560525.o8'i~{ :t:\t~·~1~74tf44~19~'?3:;: :tt~#~.)f\1-79.7 77 663.44
MW-20 1387545.37 ') 560921.31 ,,, '.',/~'?,,o/4fii3s~g,\0 ?~;1~f\~i?1·22.s 105.5 638 .. 13
~w-21 1388874 .. 67 \ 561938 .. 07 ' r ,, , r ,•• • " C .,, ' · ·--~'f2'~693'.04t~-:.:'";i,. ~-; ~-;,:--~;.,,,82.96 46 647 .. 04
MW-22 1389520.01 561336.78 i.' '·'i}i;\4,o:i:aeii'ii{\t· '>W 102 .. 6 75 628,06
rw.1 1388108,99 560871,66 ·73i;,7;1s:i;\(/' ii' 105 120 615,72
rw.2 1388120 .. 87 560871.37 ·· .. · 735,79 · ' 177,6 120 615,79
"W-3 1388183.2 560877.47 .. 734,26 184 120 614,26
rw-4 1388301,12 560865,57 i 732.43 148 120 612.43
h_W-5 1387966.65 S61270,94 729,15 · 53.4 40 689.15 h.W-6 1388127.45 ' ,' 561184.75 . 725,78 . 84,4 .· 64 661 .. 78
':".W-7 1388605,84 561315:12 .·. ; .' 714.31 ; 105,2 60 654,31
L-:':W-8 1388785.96 561233.49 706,05· 71,7 65 641.05
~IM.Q 100010< o" .. ~" 7?1 1". 1'~ A "" CCC 1/S
In the Site area, the top of the water table is typically found in the saprolite aquifer and
will generally mimic the overlying land surface.. Figures 3-3 through 3-6 present cross-
sectional views of the saprolite and bedrock aquifer. The depth to water across the area
ranges from approximately 3 to 35 feet below ground surface. Table 3-3 presents groundwater
elevations collected from March through'November 1996. The relatively shallow depths to
water occur within the basin of the stream located along the northern edge of the Site, The
greatest depth to water is found along the ridgeline on the western portion of the Site, which is
also the location of the Roper's Shopping Center and North Belmont Elementary School.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No, 96S-058/June, 1997 3-12
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TABLE 3-3. 1996 GROUNDWATER ELEVATIONS AT THE NORTH BELMONT PCE SITE
STA,TION ·. EASTING NORTHIN< 'TOC ELEV ··•·'1'-J.QTR'···· 1-3 QTR. · ·,/ftmsl. ·, GWLEVEL. GWELEV .i ·.·,:c:· .... ,. ··.,· .. ft · ft.ms!
MW-1 1387833.98 560966.36 739.88 26.5 713.38 MW-2 1387895.55 561140.41 734.18 22.1 712.08
1387895.55 561150.41 734.18 23 711.18 MW-4 1387530.12 560938.87 743.74 31.3 712.44 MW-5 1388416.24 560690.37 727.22 14.9 712.32
MW-6 1387857.53 560897.83 745.65 34.6 711.05
I/IW-7 1389374.2 560964,95 717.95 27.3 690.65 I/IW-8 1388158.44 561530.6 711.6 25.3 686.3 MW-9 1389506.65 561364.34 704.24 32 672.24 MW-10 1389197.43 560407.79 732.1:ii'!' ·;i'.;.~o'.32:6.: 699.5 MW-11
I/IW-12
MW-13
MW-14
IMW-15 1389425.53 560996.1 d ,'i'iiJ.1J7:32•: 27:2<'.:J\ ':'it/690.12
MW-16
~W-17 1389834.91 561810.48 666.87 7.4 .. 659.47 .1W-18 1389063.46 560547.08' •.. ,.,728}7.-... -'t,%,27.5, .·,. • .701.2 MW-19
MW-20
I/IW-21
MW-22
1388108.99 560871.66 :, 73S.72'A:\" i:)}/;;24:t .. · 711.52 ~w-2 1388120.87 560871.37 735.79 ·.•,;': 24.1 711.69 _,:. ~W-3 1388183.2 560877.47 734.26 25.7 708.56 · ;.;w-4 1388301.12 560865.57 732.43 20.4 712:03
1387966.65 561270.94 729i15 · ' 19.6 . 709.55 "W-6 1388127.45 . 561184.75 · 0'725.78 21.1 704.68 ~W-7 1388605.84 · 561315:12 ,'Cc:714.31 21.4 692.91··: .. SW-8 1388785.96 561233A9 . ::::.706.05 -.. ·· 13.9 : 692:15· .. ··
1~8918586 5600?S95 ·•_..72116 '· ·268· 694~6
·.·.··4THQTR
•·GWLEVEL '· ... :,c::ft· :, .
30.4
25.7
27.1
33.2
20.5
34.5
27.6
22.5
32
32.9
32.4
23.4
7.2
31.7
28.58
21.6
7.22
28
· .• 30.5
.:, 3.4
.:. 30.8
27.8
27.8
30.8
28.9
25.4
... , 25.2
26.4
17.6
4THQTR
.GWELEV:
ft insl
709.48
708.48
707.08
710.54
706.72
711.15
690.35
689.1
672.24
699.2
710.63
703.75
682.13
712.01
688.74
692.76
659.65
700.7
709.94
710.43
689.64
672.26
707.92
707.99
703.46
703.53
703.75
700.58
687.91
688.45
696.26
Using groundwater elevations collected in November 1996 and potentiometric maps drawn from these groundwater elevations, groundwater within the saprolite and bedrock aquifer generally flows to the northeast to east across the site. Figures 3-8 and 3-9 depict the saprolite and bedrock aquifer potentiometric maps, respectively. Based upon the potentiometric contours, Roper's Shopping Center appears to be positioned within the top of a localized groundwater mound with potentiometric contours emanating in a semi-circular pattern from this point. Insufficient data of groundwater elevations along the western edge of the Site prevent completion of the potentiometric contours.
Based on depth-to-water measurements for monitor wells MW-13 and MW-21 , groundwater discharges from the saprolite and bedrock aquifers into the small stream along the northern edge of the Site;· however, fractures present in the partially weathered rock and bedrock will affect the direction of groundwater flow and relict fractures present in the saprolite
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-13
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LEGEND
,..,..,u ,.1om1on~1G ~.£LL {111sr ... uw 1991)
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U1 fEET ABOVE 1.tSt
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~-+ I APPROX. SCALf IN UIL[S
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SOUIICE: f10..D Ut.'ESTIO.I.JIOIJ REPORI, UORTII BillLOtll ~E 5Ul'WfWIO Sil(, Ol,,SIOU coo11Y, BEUJOI/T, 110,,m CAAOUl&A.. ROY r. W[Sl'ON, IIC .. FElllllW!T 1007.
dbEPA FIGURE 3-8
SAPROLITE AQUIFER, POTENTIOMETRIC MAP
OCTOBER 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNTY, l~C SESD PROJECT No. 96S-O58, JUNE 1997
- ---
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LEGEND
U<>-ll" t-UlCH OS'[U OOl<ftlCt.E: uornroru11,; \',"lll
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SOORCE: flO.O ltMSIKJ.I.TIOU R£PORr, IJORTU 6[1.UOUJ PCl SU'EAf\JllD srn:. OASTOIJ COUIITY, &worn. IIOIUH CNIOUI.'., . ROY f. WESJOU, ~JC., f£lllUJAR'I' 1007.
FIGURE 3-9
-
ft E Pi~ OCTOBER 1996
1 REMEDIAL INVESTIGATION REPORT 1 ~ BEDROCK AQUIFER, POTENTIOMETRIC MAP
i NORTH BELMONT PCE SUPERFUND SITE
-
, NORTH BELMONT, GASTON COUNTY, NC l SESD PROJECT No. 96S-058, JUNE 1997 ,....__------~~~~------.1---_;_-----------~.J
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may also control groundwater flow directions. According to Harned ( 1989), while working in the Piedmont Province of Guilford and Mecklenburg Counties of North Carolina, most of the natural flow i_n the bedrock system is probably confined to the upper 30 feet of bedrock where fractures are concentrated, and the overlying transition zone which apparently has the highest hydraulic conductivity of any part of the hydrogeologic system.
3.5.1 Geophysical Borehole Logging
Five monitor wells, MW-14, MW-15, MW-18, MW-20, and MW-21, were examined as a part of the geophysical logging portion of the field investigation. Within each well, specific zones have been identified that appear tq_have}ractures with indications of hydrologic activity ... ,, .. ,.-, ·:,•,'. p.,:,.,-,,-., .··. at the time of logging or fractures th§!l§l8Ri§)).j_t§~p~Y,e;9,haracteristics of possible hydro logic activity. Hydrologically active fracttjtlis/$f~}!t:i§seI#\~Qappear to be contributing water to the water column under static well co'6ditf8n's~~nffth~seif.lyclrologically active fractures may potentially act as contaminant _lf:§~Spi:iftpathways:\;~l;c'\)t%i~8J%
;!{tf f~;~;i~-~;t~~L.. -~-~,;~r~z~~~~~::t~:~;;: . As typical of bedrock aquifers in this region, the groundwater transport mechanism is
characterized by fracture sets :9i3~),1:11;!;J;),ig~J;lip;~f1!:Jl.~§l!Dt~r,~~cting fracture sets with medium to low dip angle~. Dip,~pgl~ refe~~&!/i.f!\?~i~J}~I~;}t~~!il,tle;~{~~gi-8!e plane m_~kes to the horiz~ntal plan~ or, In t~1s_ case~,the a~~um\J~JJ19,~JJ~J~';1.~,8!,~,\;/,CTi.\l,?,~:\~fho~,~Jractu,res ":'1th higher dip angle provide gravity induced drainage frpmJtheroyercly1_qgJiur,face and surface soil cover. As fractures with high dip ·angle inter§edt;°l<;i~YififiiJi~Ji:~ctGres: lateral transport occurs. A . -· '·· ... ~ .. ~-~: ''"--·-·~·-••,•,' ·,•• . _ summarization of the location or depth 10· ftacfureis, the angles associated with these fractures, and zones of interest are found in T~ble 3-4:" ·· ·
The location of high,cJip'.angle fractures varied within each borehole, although each contained at least cine zone 'qf,high/dip angle fractures. ',Based 6r1 the data summarized in Table 3-4, the average dip·angle bthigh,dip angie fnictures beneath the site is approximately 60 degrees. The average dip direction of the :high dip\ingle fractures is N7 4.37 degrees, and the average dip direction of all features logged is N66.51 degrees. However, there appears to be fractures or other features that dip toward numerous directions across the Site. At the time of logging, not every fracture was found to be hydrologically active, although many fractures appear to have characteristics of active flow.· Those zones determined to have hydrologic activity at the time of logging are as follows:
W~II Number
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
MW-14
MW-15
MW-18
MW-20
MW-21
Deeth of Active Zone
129 to 137 feet
Not clearly defined
138.5 to 144.8 feet
101 to 112 feet
Not clearly defined
3-16
-- - --- - -
TABLE 3-4. GEOPHYSICAL BOREHOLE LOGGING ZONES OF INTEREST IN MONITOR WELLS
Well_ ..
MW-14
MW-15
MW-18
MW-20
MW-21
Zone Of
'Interest
(fl; bloc)
129-137
11610124
139to 150
10110112
11710122
48 to 81
1) 129.510132
2) 134.710135
1)11910119.2
2) 123
1) 80.1 to81.4
N338,32°
N83,13°
N229,43°
N352,20°
130 to 136
12010126
48 to 81
N342,61 °
Nl 16,60°
N335,52°
Definite
Probable; fractures
appear to have
characteristics
necessary for
· providing fiow Into
lhewell.
Definite
Definite
Hydrologlc aclMly
not Indicated
Probable
---- - -
1. Broken weathered rock found along borehole wall. Erosion of
softer rock has occurred.
2. Slight temperature change to water within well.
3. lntersecllon of low dip angle fracture sets with high dip angle
sets prominent.
1. Broken, weathered rock In zone of Interest. Erosion of softer
rock has occurred. .
2. Minor temperature response at 123 feet.
1. weathered and broken rock prominent, 'Nlth erosion of soft
materials.
2. Presence of water-filled fractures and erosion cavities.
1. Broken and weathered rock prominent, with erosion of softer
zones and open fractures.
2. Presence of water-filled fractures and erosion cavities.
1. No strong temperature response.
1. No temperature response.
2. Sound and competent rock In this well.
3. Posslble water-filled fractures.
1. No temperature response.
2. Sound and competent rock In this well.
3. Possible water-fllled fractures.
Notes: "Strike~ Is interpreted as the direction in v.ttlch a horizont.ll line can be drawn o_n a plane ualng true north aa the at.lrting point. In general terma, atrick I• also used In the aena.e of the general trend or run of the
bed_s. ._., .. ,-_·• . .:"-: . : ... , 'c,·.:.,.· .. :.--.·'!•---· .• .
~Dip~ is Interpreted aa the angle that a plane ·rt1ake8 with a ho'rizontal plane, lypically thei Surface" Of the· earth·:.: tti"oangle being measured In a dlrect!on perpendicular to the atriko of the plane.
ft. btoc .. feet below top of ca.Ing. •:: ' : • .'i_: <·"-:::· ._: .. _~<--,: · ·_ . •.• .. · :-·· · >_-. · ->/ ::/ .. · ?).~t5i:)> \,.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
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Since the borehole logging techniques use temperature response as an indicator of
potential hydrologic activity, those zories within boreholes where no response is detected are
typically regarded as not hydrologically active. However, because the saprolite, partially
weathered bedrock, and bedrock aquifer zones are interconnected through gradational
contacts, the possibility exists that groundwater moving downward or through these zones does
not change temperature. As a result, a temperature response log may classify a fracture or
other feature as not hydrologically active.
The lateral and vertical extent of hydrologically active or potentially active fractures was
not determined via this borehole logging iQY!:l.~J(gc1!ion. The interconnectivity of the fractures
was also not defined. However, ba~f11.8i:\:iffi'{tf£~lc!~X~8!Jon of contaminants during groundwater
sampling activities, the spread of,9qr,jt~Jriig_@fiofi(o/itt\.ii;i3!1:)_~ bedrock aquifer may likely be
tt .b t d th . . bf .. 't·'~··· ''"······-'h· .••••..•• ., •. ,.~ ...... ,. •• a n u e to e 1nterconnect1ont _;. ractttres:·•-• .. ,~ii'&"4.ii,~J-£!'4't,t;~,, .
. .,;_;l:l1PY~~1Jtit·· --~~1:&ii~~lt.
3.6 RESIDENTIAL WELL l(iJVE,;:jt©RY AND WAIERtUS.E ,,_.;;,,~::..":li'fA·Z~-.-t:1t;:., ·•:~~:;_ _._;:.': t'.,:;..,..j-.,_;..,,e'.",'!C!-'-•A-.; •
A residential well survey,~~,S9rJ9l!,s\~9,~Y¼Yi~JO..QJr:) October, 1995 and the results of
this survey are shown on Figure')J/,li>Waridttf:ie.fassffciaWia[database is included in Appendix A. •.'! :,,:: ; \~:,:_;;..,_~..;,:f4r~•-'.'.'.,!'-,"-::~.,:.:rl"°'"..:,"';~.,:1;!.~:=5.::l....,_S,2.:M~.-'1<~1~>:":_,. ,.' <-.:~. -
Groundwater is considered ~~ a,ijl~~tV,~lli\!1!~.ij;~l~~li!Jfs .curre~tly used as a drinking water
source (USE.PA, 1988, Gu1dancEl oui~~!lt~-L~JI't~t!&'i1~i!Pr sontamm~ted Ground~ter. on ..
Superfund Sites). The State ofNortti,Carolmao;class1fiesthe aqu1fer:as a GA aquifer since 1t 1s ,_;. •·, •'C_"-c·~•;;-<,,t,~;o..,.:-'.••>;c•~• _ ,1,.-','
· a present drinking water source arid,confaih"s":i:iaturally6ccurring.chloride concentrations less
than 250 milligrams per liter (North Carolina Aclministrative Code( Title 15, Subchapter 2B.0201 ). . . . . .
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3.7 ECOLOGY
3.7.1 Wildlife and Natural Resoufcei •
According to the Gaston County Division of Planning, there are no endangered species
within a one mile radius of the Site. There is one sensitive environment named Rankin Forest
located within the three-to four-mile radius of the Site (See Figure 3-11 ). The Bigleaf
Magnolia (Magnolia macrophylla) grows within the Rankin Forest and is characterized as
significantly rare by the State. The nearest wetlands are found along Files Creek within 3 miles
of the Site (See Figure 3-2).
3. 7.2 Bioassessment
Benthic Macroinvertebrates. A complete list of the benthic macroinvertebrates collected,
the EPT Index, total taxa and total individuals, and the habitat score for all stations is included
in Appendix A. The EPT.lndex represents the total number of EPT species (Ephemeroptera -
mayflies, Plecoptera -stoneflies, and Trichoptera -caddisflies) collected at a site. These three
North Belmont PCE Site
Remedial Investigation
North Belman~ Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-18
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u CHY W1'Trn
Ut-mNO\Vi~
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USE N£1GI--IDOlrs \'IA Tm
• ACTIVE GflOllND IVAlrn \'lt:LLS
-·-
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,.:9.
::.._ --10'
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' '
-
CONCRETE
SUPPLY
I fil~E8N
-------- ---
B ;
, L[111L£.!Lfb$£.L1ill
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:! SDURCC:: DeLORME 1'vlAP E;(PERT
){~-¥~
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rlGURE 3-14 LOCA:TiOi'I OF RA.i'IKli'I :-t'-.R.DV\/000 FOREST I A E p· A' REMEDIAL IJ\IVE3T1G,<l..Ti0i'i REPORT ~\ lit.fAII · ' .· i'IORTH 8ELMOi'IT PCE SUPER:=Ui'ID Sl!E
I EI ~ • · . .·· · .. i'IORT:-, sELMOi'IT GA.STOi'i couriT'f, ,,1c ~· SESD PROJECT i'io. 963-058, JUi'IE 1997 o"-"---------------------------------------------'
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orders of benthic macroinvertebrates are generally considered the most pollution-sensitive and
their presence or absence is an indication of water quality conditions. The unnamed tributary -
" A" is a first order stream: Low diversity and abundance characterized the benthic
macroinvertebrate collections from the unnamed tributary due to its origin in and drainage
through an urbanized area.
Station UT-1, near the headwaters and upstream of the Site (Figure 2-5), had the lowest . ·
number of species collected (7) and the lowest total organisms collected (35). Only one EPT
species, the caddisfly Diplectrona, was collected at UT-1. Two-thirds of the organisms
collected at UT-1 were crayfish (Astacidae). UT-1A, the station most proximal to the Site and
downstream of UT-1 (Figure 2-5), had alrnqstfo~r, times the species (24) collected at UT-1.
However, the EPT Index was still Of!!Y,B}trffi@Y,f]Yi§Baet[s) at UT-1A. The total number of benthic ., . --~-",,--:,.~-~ ... ,,,,-·-··,·~·. ,,.
macroinvertebrates collected at U:V~r.t.Jwas0rpil;;Qvei:4half of that number were pollution tolerant
flies and midges (Diptera). ;St~ti:'.;t}J!fd~" ~ti%:tflliil, . ·
Station UT-2, downstre~gI,(tfff.!fi~&§]!e and }_$.§~1t1]tit~~1000 foot upstream of the
confluence with the unnamed tributary to Files Creek, was similar in the total species (28)and
total numbe_r (96) c?llected at ~,{~,~¾&,~~';:'~~~J;, t~~,~~~91.h.Jpffoacroinve~ebrate community at
UT-2 was different 11,:~p.~c1es <:g_[J]P,5),§l!lQIJ',f!;glJl:.t!tl~K~t:lf!/f,;,1;A. PSl{Ht1pn tolerant flies and
midges (Diptera) cOn;iprisec!]8%;gt~~lR'.§Jj.~J,tijj[~~LR&fle~5etEfcblJecti?ns at UT-2. UT-2
had an EPT Index ofonly 2 (Ephem'?rnP.t¢r,;:it;:;Stenonema; Jmchopter.a= D1plectrona). ':)·_,\ -:-'._~/r~~1\¥f{)~.:~}il1:titl?}Etf;J/··J . ./~c;. .
The reference stream, Dutchl]'lans Creek at State'Route 1918 (DC-1 ), 1s a larger stream
than the unnamed tributary.studied during thf? investigation (Figure 2-6). Benthic .
macroinvertebrate collections at DC-1 were diverse,with a totai of 258 organisms collected
representing 35 total species. 'the EFIT lndJIC:at DC-1 was':1;7. Almost half (49%) of the total
benthic macro invertebrates toiiected were from the polrGtk:iri.::seh&itiv\:i Ephemeroptera, Plecoptera, and Trichoptera: . . ... . . . . . . ........... , .. · ... .
Habitat Evaluations. Habitat evaluation scores were low at the unnamed tributary -"A"
stations. Habitat evaluation scores for the unnamed tributary were in the "fair" category and
ranged from 56-67. Sedimentation, lack of stable habitats (rubble, gravel, logs, or undercut
banks), and the lack of riffles and runs all contributed to low habitat evaluation scores. The
reference station (DC-1 ), although experiencing some effects from sedimentation, had a habitat
evaluation score of 100 which falls in the "good" category. Streams with degraded habitats are
characterized by a benthic macroinvertebrate fauna composed of pollution-tolerant and
opportunistic species. This seems to be the case for the unnamed tributary.
In-situ Physicochemical Measurements. Table 3-5 presents results of the in-situ
physicochemical measurements taken at each sampling station. Dissolved oxygen, pH, and
water temperature measurements at all stations revealed no striking differences. Dissolved
oxygen ranged between 7.0 -8.0 mg/L, pH ranged from 6.6 to 7.4, and the water temperature
ranged from 19 to 22° Centigrade. Conductivity at the unnamed tributary was higher (range:
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-21
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TABLE 3--5. RESULTS OF IN.SITU PHYSICOCHEMICAL MEASUREMENTS; UNNAMED TRIBUTARY -"A" (Un ADJACENT
TO THE SITE AND DUTCHMANS CREEK (DC) REFERENCE STREAM; JULY 1996.
pH
UT-1 7/10/96 1205 7.4 119.9 6.9 20.4
UT-1A 7/10/96 1615 7.2 114.0 6.6 21.8
UT-2 7/10/96 1305 7.9 203.0 7.2 20.3
DC-1 7/11/96 · 0830 7.9 75.1 7.0 20.4
114 -203 umhos/cm) than DC-1, the refe,.r9-8_~,ll!i:1tion (75 umhos/cm) possibly due to urban
influences in the drainage area of tl.;\~!:Q,!'.!r:Jff/n~~t!ff~9t1:3__ry. In-situ physicochemical
measurements revealed no violatidrjsJ9f(§tii~vrc1teJ~quality standards.
tJtrji:J~/ffr?~t· ·_ -.. _ --~rwi1r~:~htf~;:;~\
The Rapid BioassessmefiHjJl[~f{tne unnam~'.qHfjbJltajy adjacent to the Site (stations UT-
1, UT-1A, and UT-2) and Dutcl)fiia/:is~Q~Wek (referffe'niie"'ist$tlon DC-1) resulted in these findings:
• Benthic macroinve.cte.b.rate.c.9U~6tipf1$JrpmJl1e unnamed tributary (UT) indicate . ··:,"' ·), .,.,---·--.,J:,>,;,-,··,:>---'·'--'. ·.-···--•:,:,-., ,,., .,,. ·: ·--•,,··:•,-· ~--~--:· ..
that thEl_;f[eek is ih?,8~i~t~-~;ig,Ql!~!Jgtjf!R.I~,~1!I~Pecies ,of benthic
macroinvertebratesi\pQ!J(~tiJytrr1i.\'.lg~s/a_rit;l,fli$.s (Diptera) were.predominant
numerically in both tAA~f(tp'e3Ii~}i~ri'cf:.:~Ifi'i:Ji~iduals ( density). ·--.. : ._·, ·";~;~~-:i~1Yti1?f21tr"i1~~tt:/t/..., _.,/ __ .. -.. . _ -
• Benthic macroinvertebrate collections from the reference station, Dutchmans
Creek (DC-1 ),,were divcirse with a total cif 35 species classified. Pollution-
sensitive species of benthic mac:roinvertebrates (Ephemeroptera, Plecoptera, and
Trichoptera = .EPT)N1e.re' more prevalent atDC-1 from both a numerical density
and taxa rithn~ss,!fer~p~ctive. ;t-Jo impairment is indicated for DC-1.
• Habitat degradatiori'Wai5e◊identaiall the unnamed tributary stations. Lack of
habitat diversity, siltation/sedimentation, and the absence of riffle/runs all
contributed to low habitat evaluation scores. This was an obvious factor affecting
the benthic macroinvertebrates at the unnamed tributary since the biological
potential of a site is largely determined by the quality of the habitat at that site.
Quality of the habitat at all the unnamed tributary sites could only be classified as
fair. Habitat evaluation scores ranged from 56-67.
• The reference station, DC-1, had a habitat evaluation score of 100 which falls into
the classification of "good" based on the habitat assessment form. Some
sedimentation effects prohibited DC-1 from having a habitat evaluation score in
the "excellent" range (104-135). Habitat diversity, coupled with no serious habitat
degradation, led to a diverse benthic macroinvertebrate fauna at DC-1.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-22
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• In-situ physicochemical measurements at the unnamed tributary (UT) and Dutchmans Creek (DC-1) revealed no violations of state water quality standards. Dissolved oxygen, pH, and water temperature were similar in range at ~oth creek systems. Conductivity values were higher at the unnamed tributary possibly due to the effects of urban drainage.
Due to the unnamed tributary's location in a highly urbanized area, it is difficult, without extensive and intensive study efforts, to ascertain what effect the Site has on impairment of the benthic macroinvertebrate community. For example, both urban and Site effects could be · impacting the biology of the unnamed tributary.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 3-23
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4.ll :NA."TiLJRIE Ait'!liO iEX"J"Ei>fT Of C,0~"iiAuliBNATlON ii:,: -------'---.c;..;..;c.....c;;,;..;..;,.;;:;.;,,.;.,c:......:;...:........:...::....:...c...:...... __________________ _
All of the laboratory analyses were conducted by either a contract laboratory in
accordance with the EPA standard procedures and protocols for the Contract Laboratory
Program (CLP), or by SESD's Analytical Support Br2nch in accordance with the procedures
and protocols specified in their Analytical Support B;anch Operations and Qualiti; Cont;ol
/\J!anual, October, 1990. Analytical data reports for each sample collected are presented in
Appendix B. Also, summary tables are included in Appendix B indicating all detectable
concentrations.
Based upon the Site Inspection Report. for the North Belmont PCE Site, NCDEHNR, July,
1993, the main contaminants at the Site aretetrachloroethylene (PCE), trichloroethylene (TCE),
and cis-1,2 dichloroethylene (CIS;,1 ;2 D,C:E). 'T,he followirig discussion highlights these
constituents as well as any chemie§I c:onstituents\vtiich e)(ceed the National Primary Drinking
Water Regulations (NPDWR) M<:lXimurhContaminan(L~vels (MCLs), the National Secondary
Drinking 1/1/ater Regulations (SMQLs);:F:¢deral Amt:ii~htvVater Quality Criteria (AWQC), EPA
Region 3 Risk-Based Concentrations (Smith, 1996) and the North Carolina Groundwater
Classification and Standards-Groundw9ter;Quali\y $fanqards of the North Carolina
Administrative Code (15A NCAC :zL Q202(c)); ano North :Carolina \Nater Quality Standards
applicable to Surface Waters ( 1 S_ANCAC 2B/b26b)) •··· · ·· ,.,, .. · ' , .. ' ,, .. ••, .... ,.. •·
4.1 SURFACE WATER AND SEDIMENTS! < ·.
A summary of the main contaminants found in the surface water and sediments are
noted in Table 4-1. Reference Figure 2-4 for surface water/sediment locations.
TABLE 4-1. MAIN CONTAMINANTS IN THE SURFACc WATER/SEDIMENT AT THE NORTH BELMONT PCE SITE.
STATION I ALUMINUM: Q IRON I LEAD Q I MANGANESE Q I ZINC Q BENZO-A-Q
. ·PYREillE
SURFACE UG/L UG/L UG/L UG/L UG/L UG/L
WATER
N8201SW 35 j 270 1 U 43 10U 10U
I N8201SWS 58 290 1 U 42 au 10U
N8202SW 32 j 370 I 1 U 77 10 U 10U
I N8203S\/\/ -.. -.:,-., " 2.:.0 -..;:, 10U ' ·=·,,· .. '
l CRITERIA 87(1) I 1000 {l)(2) 1.32"'· 251~ 50(2) I 58.9(11, 50(2) NA
I SE!JIME:'IT I UG/KG UG/KG I UG/KG I UGf,<G UG/KG 1 UG/KG l
I
e1a20·1s0 I 3000000 I 1,1000000 I ll300 ! 2ll000Q J I 4?000J I 870U
i'l8201S0S I 3200000 I 160000CO I 53CO ' ?50000 J I 52000J l -~·'.OU !
ol82C2SD I 3?00000 I 3600000 ! ?5000 I 140000 J I 35000 j 420U
11 NB203S0 I ·1000000 I 1 aooooo I 1300 ! 150000 J I 14000 I c•:·: J
CRITE,'l.lA 78000000 "' I ?3000000 "' i 400000 '" 1800000 IJ) 23000000 IJI i aa m
i'IOTES: (ll :: =.-=. Values 2xcsed ~ederal Surfac2 \/lfater Quality StanCards; 12i :3:=:'==i'! Vaiues a::ceed NC \Nater Qua!ity
Standards: !3l "=:_1J.= values s:~c2ed ~aaicn·3 :~isk :3esed Conc2ntration Values: i'IA = Net Aoo!ica:Jle
North Se!mont PCC Site
Rarr:edial Investigation
North Belmont, Gaston Ccunfy, NC
SES0 ?roject ~le. 96S-058/June, 1997
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SUBSURFACE SOILS
Tile subsurfeca soils were divided into six zones: 5 feet, 10 f.aet, 15 -feet, 20 feet, 30 feet,
and 40 to 11 O feet below ground surfaca. A summar; of the COC's in the subsurfeca soils for
the 5, 10 15 and 30 feet zones are noted in Tabie 4-2 thru Table 4-5, raspec!ively; these
samples were submitted for full TCL/T AL analysis scan. The subsurfaca soils ancountered at
the 20 feet zone and at the 40 to 100 feet zone sxcapt for SPT1 /82' and M\JV6/11 O' were only
analyzed for VOCs; SPT1 /82' and M\tV6/11 O' were also analyzed for extractable organics end
pesticides/pcbs. No constituents a:cc....eeded the Ragion 3 Risk Based Concantrai!on Vaiues for
these zones. R-afaranca Flgure 2-1 for subsurfaca soii sample locations.
TABLE 4-2 MAIN CONTAMINANTS AT 5·FOOT'701\JE OF SUBSURFACE SOILS AT THE NORTH 13E' MONT PCE SITE ·--
I STATION I · 1RON I MANGANESE Q I
UNITS UG/KG UG/KG
NB001SSA 500COCCO I 130000 J
I N8002SSA . : ·, S30GOOGO.':-·· · .. -1 . ·.·:·.".:.·-. 200000 J
· -:43ooOCOC 1 ·
.. .:, .. N8003SSA . , .. : _·.· ... ·, 97000 J .•,··
N8003SSS 4coaooo < , : · c --·-· .. 110000 J
N8004SSA · ,1ooocto . . :. ";-; .. _. ... •'•, 1800000 J
NB005SSA 100000000 . <·· :·.-···' . 190000 J
NB001HM 93000000 400000 J
CRITERIA 23000000 1800000
f\l()TI=~· 0.11 q:::: v-1,,,..,.,.. ~v--::i,oA □,..,,..;,..,_-::; o; ... 1, 0---...1-\J ... 1, '"""
TABLE 4-3 MAIN CONTAMINANTS AT •o rooT 70NE OF SUBSURFAC" SOILS AT THE NORTH BE' 'AONT ,,, .. = SITE ' r -~ ~--~
I STATION I IRON I
UNITS UG/KG I
I N8001HAS 3;;,:.:cc,:c I I
I SPT111 0' I ~-1::::cc:0 I
Mv\/5/"I0' I 2.-: :·],::::,:· I
ii i I C.~tr:=:=Nt. ?3000COO
!1 0101:=.]· ·• : :.-,,,;lu-:;s ~:rc::2d R:;oion 3 ;:?\:::\< 8;:;:::eg Conc:;;,+i;;:_;·lioi7 \/~luss
Nardi ae!r,:ont ?CE Site
RameCl2l lnv.estigatlcn
i'-lorth Belmont Gaston County, i'lC
SESC P:-cject Mc. 963-058/J1.2ne. 1997
MANGANESE Q I
UG/KG I
~2c0ci:r-J l
1300000 I
2·10000 j
"13CCOOQ 1
'
4-2
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TAGL"' 4-4 MAIN CONTAMINANTS AT 15 FvOT 7ONE OF SUBSUR"ACE SOILS AT THE NORTH BELMONT "CE SITE --'I STATimJ I IRON I MANGANESE Q I VANADIUM I
UNITS UG/KG UG/KG UG/KG
NB001SSC :G•JCOCCG 1700000 J 200000
NB002SSC 43CCCGCO 740000 J 150000
NB003SSC 37CCCCCO 400000 J I 100000
NB004SSC 72·:GGCCO 190000 J I 200000
NB005SSC :-r ;:cccco 2000000 J 440000
NB001HAC 38!:0:CGGG ::400000 J sccoco
CRITERIA 23000000 1800000 550000
i\!f""'ITl=C:::.· ~I ! j:-=; 1fs:il11.oc 0 -....1 ;""']~-:--'::t ~:-1. Q.,,.,."'..i '"'----=,-'--..: n \f.,;:,!110.c
TABLE 4-5 MAIN CONTAMINANTS AT 3()•FOOTZONE OF suss'uRFACE SOILS AT THE NORTH BE• MONT PCE "ITE --I STATION I IRON I MANGANESE Q I
UNITS .UG/KG UG/KG
NB001SSE · 4'?0CCC00 •. 1300000 J
NB002SSE 700C0C00 .
?500000 J ... ,
NB003SSE 3so·oc·oco ·.• • .. ·-;, .. · : : ·:.--~·-•: 1400000 J
NB004SSE "4G0OCO0 · · ... · :.·,. :;,.···· . 2900000 J
NB005SSE 110000000 . ...... ·.:, ... 2500000 J
SPT1/30' 460G00C0 1300000
MW6130' 360CC0C0 750000
CRITERIA 23000000 1800000
' · P.! U!= v,::il, 10.e ov,-,a-....1 ri __ : __ '::t c;..,,1,, 0.,,.,.,,..-1 -v,1 .. 00
4.3 GROUND WATER
4.3.1 Ground Water Plume in 1991
.A. summar'} of the chemical constituents obsa;ved in the ·1991 groundwater sampling
event is noted in TalOije -4_;_ Concan'i:raiiOn isopleths .21,3 nc:ted en f~g(!.Ju""'3S .!!}-"J thru t}-3 ·701
PGE: TCE =iid cis-·l 12 DCC. J;-;1~ s::-;;c:sn-£::=tic•n is-~p!s·i:\7s V•F~f,?; ,jf?.'-Nn \Ni·{h ·~\-iis us.~ cf 2-!..;rfs;®·ioi
VV!rdo,Ns '/'$I"3lcn :3 by Goidsn 3ofi:\,vsr·a, ln.::.
i'icri:h 8eimont PCE Site
:~&medial lnl/est:gatlon
North Belmont, Gaston County, NC
SESO Project No. 963-053/Jun~. 1S57 4.3
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Ti.\GU'' 4..;J MAIN CONTAMINANTS IN 71-iE GROUNDWi.\TERIN 1991 AT THE NORTH BE' MONT ~CE SITE -
LANDLOT IPARCE!...IOWNER I ADDRESS I PCE
UNITS UG/L
15-18 1.00 SHOP. CNTR WELL Woodlawn 1.CO
15-18A 2.00 MW-1 MW-1 ~ :.!..: :,:-
15-18A 2.00 MW-2 MW-2 0.50
15-18A 2.00 MW-3 I MW-3 -15-18A 2.00 MW-4 IMW...1 0.50
15-18A 13.00 MW-5 MW-5 0.50
15-18A 14.00 PAYSEUR.BETTY 201 School 0.50
15-18A 15.00 LS".THERMAN, J.D. 203 School 0.6'1
15-18A 19.00 SOLOMAN. PAUL 213 School 0.50
15-18A 61.00 FULL GOSPEL CH. .116 School · ·: 0.50
15-18A 62.00 FUJIKO DAVID 114 schaol· . _, . 0.50
15-18A 64.00 RUSSELL, BRENDA 110.si:hool. · : .: ·.: :a:so
15-18A 65.00 CONNER.FLETCHER · 104 ·Aoricot ·LOO
15-18A 66.00 CANIPE. ROMAIEM .. · 106 Apricot · .. ,.=;ab:
15-18A 67.00 KEETER. D. 116 Maqnolia ·a.so·
15-18A 68.00 DEESE. J.C. 114 Maqnolia 0.50
15-18A 70.00 GRIFFIN, RENTAL 11 a.Apricot.· '· 36.70,.
15-18A 71.00 DECKER. MARY-·. 1'109 Airicot · •·ao:st
15-18A 74.00 HUGHES, ELENE : 109 Gbsheii .:. : I•. 1 aono:nr ·••,"' .. ·'-'"
15-18A 76.01 HUFFMAN. BESSIE · · :.107 Arincot • ,,. _:_ :. 36.%
15~18A 77.00 SILER. MABLE '105-Aririccit:·· ::: ·• • :· ' :65.0C
15-18A 78.00
15-18A 79.00
15-18A 80.00
15-18A 84.00
15-18A 85.00
15-18A 87.00
15-18A 87.01
15-18A 87.02
15-18A 88.00
15-18A 91.00
15-18A 92.00
15-18A 94.00
15-18A 95.00
15-18A 96.01
· CR/TE.CUA
North 8eir.iont PCE Sri:e
R~medial Investigation
WALLACE, BOB
SHERRILL, J.D.
N. BEL. ELEM. SCH.
MAHFAFFY. D.
PARKER. FRANKIN
CLARK. CHARLTON
JORDAN.REBECCA
CAGLE.BERTHA
KUNZMAN, RUTH
VAN DYKE. HELEN
GALLOWAY, JULIE
GRIFFIN, BOB
MESSER. ALLIE M.
COLI ETTE, JAMES
North Belmont. Gaston County, NC
SESD Project i'lo. 96S-05a/June, ~9S7
103 A'ci.ricor " ~ 093.CG
101 A□ricot 0.50
113 School src,_oo
197 Goshen "B" .;!500.·':;C
199 Goshen 1.30
201 Goshen 12.GC
203 Goshen i ~ . .S·J
205 Goshen '"lf'; ::i--~-~ .......
204 Goshen ~ ;~. 5C
115 Maanolia 1.00
117 Maanolia 3.7G
121 Maanolia ! •:•.CC
123 Maonolia 0.50
I 2309 :,cme 0.50
I 5(11, 0. 7t2)
!
·-
o! TCE Q I cis1.2DCE
I UG/L UG/L
i 1.00 1.00
I ., 14.00
ul 0.50 U 0.50
I 0.50 U 3.50 ul 0.50 U 0.50 ul 0.50 U 0.50 ul 0.50 U 0.50
I 0.50 U 0.50
u! 0.60 0.80 ul 0.50 U 0.50
ui 0.50 U 0.50
u! 0.50 U 0.50
I 1.00 1.00
I 1.00 1.00 ul 0.50 U 0.50
u 0.50 U 0.50
1.90 4.10
i.9C 20.?0
I i 9.!. oc ':C.:!_;J,~
I 1.80 4.40
I 5~ -•~(' ~ ·,-: _,J(;
I 59.C:C ".7':.0C
u 0.50 U 0.50
::.cc, : 2~.·JC
~3C.:JC· -S-3C.-;c
1.00 J 1.00
7.2'J 41.70
:.2r: 28.70
t 3.:,.: 66.00 ' I 3::. ~C-121::.:;,: I
i 1.00 1.00
I 1.00 J 1.00
I 0.50 U 1A0
Ui 0.50 U 0.50
u! 0.50 U 0.50 i 5(1J, 2.8<21 70.00 111
!
..
Q
u
u
u
u
u
u
u
u
u
u
u
J
u
u t I
ii
11
4-4
liiiii
56~000
561500
561000
O> J!!
c~f z ~
Ps
560500
z
560000
559500
559000
liiiiiill -
.I __ .. --
.. I
I.-
i
'!1 ·-,. ,
J.-
1 1386500
EPA
---
I
/
.. :·_i✓,i··_·
._.,.
·····1 · ··---r····--
1387000 1387500
-
1388000
-·--- -- --- - -
i
ug/l
-/
10
5
1388500 1389000
r---
1389500
,--·------r -·---··--
1300000 1390500
EASTING, feet
FIGURE 4-1 PCE GROUNDWATER CONTAMINATION, 1991
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
~ORTH BELMONT, GASTON C?~l'!_TY,!'J_C
NOTTO SCALE
..
.. :;/: ·:_'.~-~~t~ :'.:-: ~);~
-
1i3 .ru
- -
56::?000
561500
561000
560500
560000
559500
559000
E.PA
-
.I.
I 1386500
- -
·,··--··········1
I 387000 1387500
-
··7
1388000
- - - --- ----
_JI)')
1-'i
"'
5
-----·------··-·1 · ·------···-···1--·-··---·····1••
1388500 1389000 1389500 1390000 1390500
EASTll~G, feet
FIGURE 4•2 TCE GROUNDWATER CONTAMINATION, 1991
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUNTY, NC
!•JOT TO SCALE
-
--
:OG:2000
Sl115t10
9) 100(1
-rtt .il!
I 0 :2: 560500 'f I-' It'. () :2:
~;l'itlt)(ll).
... -........ · ... ' '. --,._ .. -,
------
... I..
1:;,d1•P1
I 1387000
·1
.I.
'I I ·,i
----------' .__ ............... '"_..,., . .._.,......,a ..... ,.....,.,..., ... •.._,..__ ....... ...,.."'"'"'-'-'-.. -'-''•..:..,:,_ ... ,_.;..-''";..• ..... .,,._"'"',_._., -•:.:,. ,:c:.,
!
I
·1 ··· .
1388000
I.
1388500 1 389000
EASTING, feet
. ... J. ----· --...
. . ······1······
1389500 I l 3!~0000
-........ !. .. .
i 1390500
--
.·.··· .. ····-· ..... · __________________ :._~;....:..:.:.:.·..:..:....:.:.;;.:..~.a.:.u.~=~::.:..;...=:..-. .. .&:.U.~11~-•~•u•~•=c•£"~>•• .. •u-...--=-.............. ,.,..,.ia.:.,...,...,.;;..a...,,....,_:,,.-~::.t.:. .. .._ ...... ~ .. ·;,..,.'"-"'· ···· ·::.,.:.·-,.,_.,--· · ·· ...._ ... ·-···· ·········· · ---•· ·-·· ·
l'IGUllE 4-3 CIS-1,2, DCE GROUMDWATEfl COMTAMINATIOl-l, 1991
REMEDIAL INVESTIGATION REPOR7'
NOIHl·I BELMONT PCE SUPEllFUND SITE
MOlnH BELMONT, GASTON COUNTY, NC
NOl lO SCALE
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4.3.2 1\/larch/,t\pril 1996 Groundwaier Plume
SESD collecied groundwaier samples from the on-site permanent moniioring wells and converted residential moniioring wells in March/April, 1996. The wells were sampled to
deiermine the changes in the plume since 1991 and to deiermine placameni of additional
permanent monitoring wells for the RI. Tne results of the sampling are noted in Talbie 4-7 and
the contaminant isopleth for PCE is shown on flgu,-e 4-4.
TABLE 4-7 MAIN CONTAMINANTS IN THE GW IN MARCH/APRIL 1996 AT THE NORTH BELMONT PCE SITE
LOT I STATION I PCE ol TCE ol cis1;2DCE Q I CLFM d PS al AL Q I MN Q I FE
UG/L UG/L · /: UG/L-'·· <UG/L" UG/L UG/L UG/L UG/L
2 NB001TCF 2=c.:, 7-.9' ... :. >' -; 15 0 ··0,5:, J NA NA NA
74 NB002TCG 160,0 4:5. ·J '; 15.0 . 1:0 'U NA NA NA
80 NB003TCI 7 . .:. --1'.8. 1.6 ,._.-1:0 u NA NA NA
? NB006MW 2.3 5.0 u····. ·. 5.0 1.3
..
10 u 74 9.8 12 u
2 NB007MW '58.: 3.6 11.0 5.0 ul 10 u "150 47.0 110
2 NB008MW 5.0 u 5.0 u . 5:0 u ·'SO··U 10 u 50 u 2.5 u 12
48 NB015MW 5.0 u 5.0 u . 5.0 u : 5.o.'u NA NA NA 7,1 NB025MW .:!.40:J s~_·o. :-. ·: ··2s.o·· .. 5.0 U NA NA NA
84 NB028MW 5.0 u 5.0 'U '. .. ,_:5,0 ·u> '. :. 5.0 ul NA NA NA .. . :-· .
84 NB029MW 11 :J1J. ·=-27.D ·.' '\ "9:3-.,j .. ·5.o u NA NA NA .
87.02 NB030MW 1.7 5.0 u . '5.0 U 5.0 u NA NA NA
88 NB031MW 3~,cc.:: 270.0 :J.:..'~'· ' .. ; 5,0 u 10 u 50 u 2.5 u 12
94 NB032MW 2cc.-: 8.J. 13.0 5.0 u NA NA NA
102 NB035MW 5.0 u 5.0 u 5.0 u 5.0 u 13 61 260.0 6800
102 NB35DMW 5.0 u 5.0 u 5.0 u 5.0 u -:oo 55 u 33.0 7700
CRITERIA 5(11,0_7(2) 5"'.2.8'" 10.0<1> 0.19'" 15 (2) 50-200 '" 50.0(J) I 300~'
NOTES;m •°'=:: Values exceed Primary MCLs or MCLGs;m 3LU':, values exceed North Carolina GW Standards; CJlGRE=.N Values e~---ao.ri ,.. ,.r, •
4.3.3 S,1allow Groundwater Plume
SESD collect-sci grnundwat-e, samples 'f,:Jiii si12llow ternpo,a,y monitoring weils in .June, ·1 SSC. Tile '1Veils 'N3F3 32ii1Dled ·tc de·t,:s:mint3 -;J;•s 3hailo·,r1; ·Ji:)L:i1ci'N3t'3l .'JiUi,";S. T;1e 3\7£:iiC'N . -' ~r=:und,,vat:-ar plL:me is eppr,:;;drna~:s!y 30 .. ['.J 35 T:s·at '.J,sio-...1,1 'th•s !2nc] .3urf2c2. Ti1,.:~ ·:on·[2rnin2r:·;:
isoplet\Js ·for ?CE: TCE 2nd cis-'! 12 DCE srs shcN:~: ·Jr: i;='irgQ.2J:;s --1~.-~ ·1•nru 4-71 21;G j13 T33:Jn2 ·~·f
·ti-:,.s 22mpiing :::2 i7•:)tsd in l':ElO~e ~~-~-
Mcrtt: Se!mont PC~ Site
R~medial Investigation
C
N
N
N
u
u
N
N
N
N
N
lJ.
N
North Belmont, Gaston County, NC
SESD 0 rajeci ela. 96S-058/June, 1997 4-3
0 C, ;u 'ii t n 0 "
-
]!j
('i z
~ z
-
562000
561500
561000
560500
560000
559500
-
I 1386500
EPA
-- - - -
I --------,
1387000 1387500 1388000
- -- - ---
1388500 1389000 1389500 1390000 1390500
EASTING, feet
FIGURE 4-4 PCE CONTAMINATION PLUME, MARCH/APRIL 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPER FUND SITE
NORTH BELMONT, GASTON COUNTY, NC
ccc-n non 1crT ·"'-nee, r,i:o 11 ,ur-~nn-.
- -
I 1391000
- -
,gll
1()()
15
10
5
NOTTO SCALE
.;:-' ..
-
56~000
5t}l 500
56 JOOO
560500
560000,
550500
559000
I I
I
-
T 1380500
---------
/
I
I
---;---•------i--------1--------1----------1---------r--· 1387000 1387500 1388000 1388500 1389000 1389500
EASTING, feet
-
_J
I (
-·1
1390000
--
__ J
13Ji500
FIGURE 4-6 SHALLOW GROUNDWATER PLUME, PCE CONTAMINATION, JUNE 1801l REMEDIAL INVESTIGATION REPOIH
NORTH BELMONT PCE SUPERFUND SITE NORTH BELMONT, GASTON COUNTY, NC ,-.,-,-.n ""'"' ,,...,... ... u_ ,...r,,-. ,...,.,.. ",.,.-• ,...,.....,
---
.100
Hi
NOT ·ro SC/ILi'.
D C-,o .,, • •. r,
0
"
--
Sfil t)OQ ·
"iii -~
c.0' 2: ~,fi():)00 i 'E I-ls :~
5fi(ll)l)Q ·
--
.L
. ~ ;
···-1
1 :snGGOO
-
I
1.Jtrl()(lt)
-----------
...... ·--l. .... -.. L ..... L I.
--~--~_n1l!i~tt~_~:~;:iit}1~~-£1)~:::: I
·:j··
1307,;oo
' ' ' '
' \ ' ' '
\
.,.
\388000
\
//
/.f
i '
'
/
·····1··
\ 38ll500 1389000
EASTING, feel
... _1,
... T.
\389500
(
(
····r
13!l0000 1390500
FIGUllE 4-G SHALi.OW GROUNDWATER PLUME, TCE CONTAMINATION, JUNE 1096 REMEDIAL INVESTIGATION REPORT . · NORTH BELMONT PCE SUPERFUND SITE NORTH BELMONl; GASTON COUNTY, NC ·c:::s::c:::n con 1.c=rT i.1 ... nae ru::o 11a1c _-trvi"l'
-
I I
i
-1
·I
j
I I
I
I '
j
--
u-)11.
100
. -15
10
3
NOTTO GCALE
-
u-; ,Pl
('j
-
562000
561500
561000
Z 560500 t n~ 0 z
560000
559500
559000
-
FPA
-
i 1386500
-
I 1387000
-- - --- - ---- --
119/l
1000
140
--r--------r-------
I 387500 1388000 1388500 1389000
-----,----------,--------------r--·-------
1389500 1300000 1390500
EASTING, feet
FIGURE 4-7 SHALLOW GROUNDWATER PLUME, DCE CONTAMINATION, JUNE 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
':'.?!l.:f!~~L~_?_!l!, G~_S_T()~-C()~f!_TY, N_C
NOTTO SCALE
-
I
I
I
I
I
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I
I
I
I
I
I
I
I
I
I
I
I
I
T~ol=.'1-3 MAIN CON1AMINAilJ1S IN 1HE SHALLOW GW PLUME IN JUNE 1996 AT THE SITc
II STATION I PC:: Q I TCE Q I CIS -1.2 DCE Q
UNITS UG/L UG/L UG/L
NB001TWA(STW) 1 u 1 u 1 u I NB002TWA(STW) 1 u 1 u 1 u
NB003TWA(STW) -•C •';•' ! ---....
NB004TWA(STWl 1 u 1 u 1 u
NB00STWA(STW) --1 u 1 u I NB006TWA<STW\ -----~ ~-~ I ... ,. ~.:.·-··. ·-·-·
NB00TTWAISTW) 1 u 1 u I < u ' NB008TWAISTW) ~ c-~ 4 u I 2.9 J ' NB0091WAISTW\ 1 u 1 u I 1 u
NB010TWAISTI/I/) 1.2 . ·:.-,-:· 1 u I 1 u
CRITERIA 5 1'', 0.71" .. :',i · .. · ·.: :.··c:, .. : 5(1'i2.8 '" I 70 111 .. .!• .. ·, .
Nn1i=,:::;• cil ::-~ v..,,1,,,..,,,. .:iv,..0 ..... ...1 ·:i\.Af"'.i-lc: ,.: ... i\,11'."I:~,..:-(i) ." ~i. I }i= v..:.,;,~•.ov.-.aerl N,..,M. r..w .,.
4.3.4 Top of Bedroc!, Grounci'<Vat~rPlume
SESD collected ground'v'fcltersampi¢sfrornJop of bedrock (TOB) temporary monitoring
wells in July/August, 1996. Th~.¢ri~lyti~fl'esuit~ qf,thissampling event are noted on Table 4-
9. Tile PCE and TCE plumes were niodelecl: usina surfer, and ihe resulting isopleths aided in
the design of the permanent monitdl"ing0i:JJl;syste-m/Figure 4-8 depicts the PCE olume defined by the temporary top of bedrock w~lls(' • .. ,
TABLE 4-9 MAIN CONTAMINANTS IN TEMPORARY TOB GW PLUME JULY/AUG 1996 AT THE SITE I STATION I PCE Q I TCE
UNITS UG/L UG/L
SPT1fTOR ; ~CO. S 1
TW2 10.0 u 10
TW3 .:!50.'.: J i'.";
TW3D .:co.-: J 2.1
D/1/4 1.0 u 1
TW5 1.7 1
Tl/I/SA 1.0 u 1
Tv\JS '.2 . .J 1 I TVl/7 u 10 l ·10.0
TINS 10.0 u 10
TuV9 1 i ..
:1 T'J\/10 ;., ~ I 1 l •
I ' ;\fl/'; I ·1.0 u ·1 1
,! "i"'NiZ ·1.0 u I 1.
' T\N~3 :: .. 2 1
' T'i\/'!4 I ·1.0 u I ' ; ! 5111, Q./(::1 I 5i11, 2.sr:1 i CRJJ.=R!A
i i\!QT:=3· '" --11:::jues qtc;;2erl :'~rirn::l;-\/ i'IM;;;: s '1r ~1lQl,,Gs:
Nert, 8elmont ~CE Site
R3medi.=i lnvesi:igation
~lcrth 3,e!mont, Ge.Sier. Count-/, NC
SC3C :=,eject i'ic. 982-053/June, 19£·7
Q I . METHYLENE CHLORIDE Q
UG/L
J NA
u NA
J ' 50.0 u
J 62.0 J
u 3.4
u 5.0 u
u 5.0 u
u 5.0 u
u f\!A
u NA
u 5.0 u
u I 5.0 u
I u I S.IJ L
'J i 5.0 1.J
Li I 5.0 L..:
u I 5.0 u
I 5n1
l:!) .-. : ;-= v:::;i1J·2S ~-~c~.,;d i,lcj"':"["; c~rcijne G\/'-/ Sl~oQ~jr:I::::
I
i
i
!
i .
'
i
4-12
0 C, ;o 'ii /;, r,
D ,.
-
.no. '"~'
--
!:",fi:?000
SfilOOO
559000
-
..... 1.
---··r·
1 '.\1]6500
--
1:387000
-
··r···
1387500
---------
···T·····
1388000
i '
// ii ,,
,:
(
····1·
1388500 1389000
EASTING, feet
r 1389500
I
I 1390000
! :
I
1390500
FIGURE 4-8 TOP OF BEDROCK GROUNDWATER PLUME, TEMPORAHY WELLS PCE CONTAMINATIOI~, JULY/AUGUST 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUN"JY, NC
---
"51.}i)
5
NOTTO SCALE
I
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I
Ti1e permanent monitoring 'Neils ,;ve;e sampied in Ociobe,/i\lovemce; 1996 anc: !he
main contaminants a;e noted in Taiole 4-10A and Tsbie 4-108. The top of bedroc:<
grour:dwata; p!ume va;ies from ap::,roximateiy 35 feet to 11 O feet below !he iand 5urface. Tile
too of bediock sarnoiing rasuits ,,vere combined for both the tempcrarv ::nd the oermanent j • ., •
ground\vater monitoring wells to obtain the contaminar.t isopleths for ?CE, TCE and cis-1,2
DCE as shown on Figurgs 4-B lhru 4-i 1.
TASL:':: 4-·JiJA. )AAJN INORGAilllC CONT,\MINl-'.NTS IN T;~E ?E:'<M TOS G.W i'LUME OCT ·199S .e.T T;-ii: SITE.
I STATION co Q . AL Q .MN Q Q
UGJI UG/L I MW? 160. · U ·. 4.0 1 u u 60 u
1.2 u
1 u
1.2 u :2co
1.2 u 140G j MVV8 1.2 u 180.0' .· 1900 I MW9
MW10
1.? u
1.2 u
1600 340.0 2400
120
MW11 ' . .:.
M'."112 1.2 u 12 u
MW13 1.2 u u i2 u
CRITERIA 5(t) 300 l2l
NOTES: 111 .~'.=:• values exceed Primary MCLs or MCLGs and-·NOi-tfr t·aroiina GW Standards; <2l GRE::N values zxcsed
c:-,...,.. ... n,-j...,"V \Jtrt c::.
TASL"' 4-108 MAIN ORGANIC CONTAMINANTS IN THE 0 i=RM TOB GW PLUME OCT 1996 !!,T THE SITE
·-
MW2
1W4
l 1W5
IVIW6
1 W\/7
1W8
11/119
~lV\/10
j ;JW11
lw1w12
1.0 UR
1.0 U
1.0 UR
50.0 U
2.7 A
1.0 U
1.0 U
5.0 U
1.0 U
1.0 u I
20.0 u I
·:.o u !
·1.0 u I
1.00 U
1.00 U
1.00 u
73.CC
0.56 j
1.00 u
1.00 u
5.00 u
1.00 u
1.00 u
1.00 u
1.00 ij
53.Q0
·1.cc
·:.JO
7iJ (1}
2.0
1.0 U
1.0
so.b
1.0
1.0
1.0
5.0
1.0
1.0
1.0
., -' ..
u
u
u
u
u
u
u
u
u
u !
u I
-.; I
·.... :
.. ,.. I
..
1.00 U
1:00 U
1.00 u
j
0.54
1.00 u
1.00 u
5.00 u
1.00 u
1.00 u
1.00
·:.co u
j
., , .. , ... : . .,u l...i
2.CO
1.00 U I
1.00 u i
1.00 u
j
1.00 u '
1.00
.11''C':---~-<11 ---,,-jl!r.i-::: .,,..,,...,,..::,..; -,..,....,::,,.._, \,l,...1 -..... 'i,i·--· ,..,,._ r.:2; ~-----= ·1"2.!l.!~3 ;;:c&~ i'ic;-t;-: C2r.:ii;;2 G'·H -3t?;i7Gar-:=:::.: ~ · · ,12c -:;fc~1,;~r.~~;;,tjgn: ~-[ :~=o•;-;~hi~~;;~~'~';f· ,~: ·.-~~;_ ~:.,;h·i~;'~:~~:::~Cs ~:~r.;, -::::;rqlina s·,N -3\;;;:"lC;;,rrl •?i: : .•. --
, ,,,. __
:-.-::i, .:;;..:;.:::; i, ,'!•~si:~ci.ic,1
- -- --
562000
561500
561000
560500
560000
559500
... (·
IJU7000
FPA
- - - - ---- -
···--------·-------------------------
.
I __ .\.-'· /
]38~500
~~-----r-·-··-··--···--·i-------------···-·------~-----
1386500 1389000 1389500 1396000 1390500
EASTING, feet
FIGURE 4-9 TOP OF BEOROCK GROUNDWATER PLUME (TEMPORARY WELLS and PERMANENT WELLS)
PCE CONTAMINATION, OCTOBER/NOVEMBER 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT. GASTON COUNTY. NC
-- -
ug/L
!
500
100
10
5
NOTTO SCALE
n C,
" " • " n u
--
562000
561500
561000
560500
560000
559500
--
I 1386500
;•~-------
FPA
-
I JJ8l000
-·--
/ .--··-1·
____ i-
··1
1388000
---
.. i
N
1---·--··
1388500 1389000
EASllNG, feet
---
(
(
--
j
/
\
-
·---·--·r·----------•.. · ·r-----·--------· 1
1389500 1390000 1390500 1391000
--
ug/L
500
.; 15
10
5
l'IGUl~E 4.·io TOP OF BEDROCI< GROUNDWATER PLUME (TEMPORARY WELLS anc\ PERMANENT WELLS) TCE CONTAMINATION, OCTOBER/NOVEMBER 1996
NOY TO SCALE
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT. GASTON GOJJNTY NC:
--
561500
561000
1I5 .(!!
Ci z
rE 560500 [i; z
560000
559500
-
/ ' /
i 1386500
FPA
--
t 1387000
-- -
_j_ i ' !
-
4 j,
-
1W5 ;t, MWl' 1J,
------ -
· --·; 387500 ----~ 38b_oo_o___ ; 38b-5oo-· ·· •-;;k~~ ·--1-3879_5_0~-----;--;~~~-----1396500 · 13911 ooo
EASrlNG, feet
-
ug/l
1000
500
·210
140
70
35
l'IGURE 4-'l'l TOP OF BEDROCK GROUNDWATER PLUME (TEMPORARY WELLS and PERMANEMT WELLS)
CIS-1,2 DCE CONTAMINATION, OCTOBER/NOVEMBER 1996 NOTTO SCALE
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH RF] MnNT nA~T(HJ r.ni It-ITV Nr.
-
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4.3.5 Bedrock Gmund\lVaier Plume
Ti1e bedroc;< groundwaier plume was evaluaied by using daia from the permanent
monitoring wells installed wiihin the bedrock aquifer as well as the residential drinking water
wells in the study area. SESD sampled all permanent bedrock monitoring wells in
Ociober/i\lovember 1996. The main contaminants of the bedrock monitoring wells are noted in
Taibie 4-1 iA and Tal:iie 4-11 :8. SESD sampled residential drinking waier wells during ihe
period of i\ilarch to September 1996. Based upon the well survey and interviews with
rt:1sidents, the majority of the drinking water wells were drilled into the bedroc:< aquifer. Tabie
4-12 notes the results of the sampling activities with respect to the main contaminants as well
as ihe depth of the well, if available. The contaminani isopleths for PCE, TCE, cis-1,2 DCE
and 1, 1 OGE were modeled using the datafrorn;b9ih.the permanent bedrock monitoring wells
and the residential drinking water weUs; these isopleths are noied on Figures 4-12 ihru 4-14. ' ' . . . -· . : . . .., ;
TABLE 4-11A. MAIN ORGANIC CONTAMINANTS IN THE BEDROCK GW PLUME, PERMANEilJT MONITORING WELLS,
OCT/NOV 1996 AT THE ilJORTH BELMONT PCi:: SITC: · -
<:T ,\ Tln.i I -:--1 ?_QCE. a r,~,. n
UNITS UG/L -:·· UG/L ,-,
"8002CW 1.00 u · ..... 1.00 cc u
"8002CWS 1.00 u 1.06 ··:·.i.u.·
"8003CW 13.00 1.00 .. ·.: LJ: .. .
IB003MW 11.00 1.00 u
18004CW 0.80 J 1.00 u
~18005CW 26.00 20.00 u
NB006CW ·;..!O.OC 50.00 u
N8007CW 9.40 4.00 u
t1B009CW 1.00 u 1.00 u
NB014MW 7.10 2.40 J
\18015MW 1.00 u 1.00 u
NB016MW ~ '.Q_r:c 1.40
NB0171v1W 1.00 u 1.00 u
\1B0181v1W 1.00 u 1.00 u
IB019illlW I 1.00 u 1.00 u
\180201v1W I 1.00 u 0.32 J
1B021MW I 1.00 u 1.00 u
'i802?MW I 1.00 u 1.00 u
i"IB022MWD : 1.00 u 1.00 u ' 11C,,/T.C,~/A I 70 m I 0.19 I:?)
jli\lOT=s· (t) : =-11::;;iues 2:~c~2C :c=in1 .. ~i'f i\1lC!_s •Ji ~,1c1 Gs· (2) ::: •
i\lorth 8eimont PCE Site
R3~ediai Investigation
I Tr-,: n pr::= n
I · UG/L UG/L
· ·1,00 u 0.50 J
1.00 u 0.50 J
. . 3.00 i, _Q(:
4.00 ,::; ;]Q
1.00 u 2.00 '
20.00 u ::2.0.cc
250.00 '.:5CC.-JC
I I.JC . -:,:. ·=·=
I 1.00 u 1.00 u
4.00 u -:::.-:c-
1.00 u 1.00 u
30.'JC ;:c.-:o
I 1.00 u 1.00 u
I 1.00 u 1.00 u
I 1.00 u .:.', _ _21j
I 1.00 u ~-·;,:
I 1.00 u 1.00 u
i 1.00 u -.. .:.. ~"'
i ·1.00 u -:.. ~ ~
i 5 (1), 2.8 ('.?) 5 1)\, 0.7 12:
··:: •1:::!iu2s :=:;:c2er,j i\ior.:, Caroiin;; G\N .Str.ndajCS
i
i
!
'
i'lorth Belmont, Gaston County, NC
SCSD Project Mo. 96S-053/June, 199i 4-19
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TAGLE 4-"118. i'v1Alill iNORGAilJIC COilJV,MINAilJTS Jill THE i3E'JROC:< GROUilJDW.i>..TEi< :=>U.JME, PEi'<l'vlAil!ENT
MONITORING WELLS OCT/NOV 1996 AT THE il!ORTl-1 BELMONT "C.: SITE '
OTSTJC,M en 0 I nc ,,.. I ?>I nl A' ,,.. f"I 0 I :=;:: " I
I/NITS UG/L UG/L UG/L UG/L UG/L UG/L
~IB002CW 2 u 3.0 u 7~00.0 20 u 25.0 30 u
'18002CWS 2 u 2.0 u 7'.:CC.G 20 u 23.0 1?0 I
IB003CW 1 u ·1 :.,J 180.0 20 u 20.0 ~20·]
IB003MW 1 u 2.0 u 20.0 u 30 u 8.0 u 40000 u
IB004CW 1 u 3.0 u 48.0 20 u 29.0 : 11:
I8005CW 1.2 u I 5.3 290.0 I 50 u 230.'J 2·;ccc
"B006CW 1.2 u I 1.? u 2.5 u i 50 u 2.5 u 12 u
IB007CW I 1.? u ·!3.0 520.0 57 17.0 ~300
"8009CW .. -230.0 44C·IJ.G .· S2 ·100.tJ 2·J,JO,J . -
"B014MW 1.2 u 1.2 u ··:_ 1·3.0 810 7?.Q 27GO
"B015i'v1W 1.2 u 1.2 tf 2.5 u _:2eo 230.0 70GO
''6016MW 1.2 u 1.? u ·. 5.2 -.1300 170.0 t·!CO
"B017MW 1.2 u 1.2 . 18.0 I 5300 110.0 5300
~1B018MW 1.2 u 1.2 ····U'· 8.2 . ·. ·150·• .• 180.0 16COO ·.
IB020MW 1.2 u 1.2 u 27.0 160 43.0 1 ~,-,(i
~IB021MW 1.2 u 1.? u. 2.5 u 51 12.0 -330
NB022MW 1.2 u 1.2 . .•·u 5:7 · .·,20> ........... " ,.-:)U.'J :2000
NB022MWD 1.2 u 1.2 ·· .. u .· ... · : .. ,.f?: ;._._ 1 · 170' 250.0 19000 ' ..
'cR!TEFl,/A 5 (1)(2) 15'21 .. ',. · 2100(2); 5000 (3) SO·C:200'" 50 (2)(JJ 300 "'"' .
!OTES:,,, .C::EG Values exceed Primary MCLs ·or MCLGs; '" BLUE values exceed ~lorth Carolina GW Standards;
t3l r:-:,=?t::::::N v.-.i,,,.. ... e...,_,.. _ _. c:-,..;..,..n_. ...... , !I.Jlr"'I c .·· -, . .':_:. ·. ·-·. ·_-,-.'
4.3.6 OTHER CONSTITUENTS
During the investigation of the groundwater plume, additional contaminants were found
which characterized a second plume. These contaminants were not found in the original site
plume; the top of bedroc!< aquifer contains 1, 1-dichloroethene and the bedroc!< aquifer contains
1, 1-'dichloroethene, 1, 1, 1-trichloroethane and trichlorofluoromethane. These compounds were
noi noied in the abov,e sections because they did ilOi e;(ceed regulatory guide!ines or criteria iil
the grQundv112t2r monitoring 'Neils. f]gl2rr3 ~I ... ·1~ denotes ·£11e cc,ncsntrs·don of ·Lh-s 11 ·J-
di•:hioioethene st -the r-espectlvs locations in ·(;7e tcp tyf roci( 111onitoring 'Neils. FJg1-.B"·'3~:s .4--~1:0
end :!.i ... -17 deiiot-; -the concarrir8tion off ·l-dichioro,2t\1sn2 ~iid trk:hicicrfluoJ.-:iT:•sthe~,s :=:·~ ·(h,s
!:s2;:--actl'FS lcc2-tions in ·Cil2 !:,edr-:c:.:: ncni'.~C•ilr:g ··;•is:is =?1•:l ·t~7s ;--s:sidsntlci 'l'IsH-2 ·;, ·1, ·i -
t-·jc\-;ic,rc,e·~\-12i:e 'NBS i7Ct •::ict£,_3,j -Ju,3 -~:-i°t3 siri-;:121;(1 '.r: G;Ji-;-::st;-~\~·j,:i"'! 'i•iVif: ·: /-·= ci7ic;--•:·,s·~/1'Si!·:S).
T>-s 0:..:pi:·Jrting cJcrt= ;-1-;-~/ ~::-,3 °f-Ju::1j in ·tJ;,s 2ti:nr::21J -~=i:;le3 -:--? /)._qp:s;;di~( _). __
f'-lorth Belmont PCE Site
Rer.1.edial lnvesiii;;z·fon
i'lorih Belmont, Gaston County, NC
SESD ~roj.ect i'lo. 963-058/June, 1997 t!.-20
4
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7),GL:: J-12.'4. MAIN CRGAi\J!C c=~rr.J.MlNAMi'S l\\J T:-!?: 3E~RCC:( GW ?!..!JME. x;slDENTlAL ~~i11w::;NG WX'i~~ :NE:...:...3. i'vlARC:➔
TI-lRU sc::i12~nsE~ 1996 Al TI-!!= j\JQR~-i 3E1 :VICNT ?C2 SIT=.
I NITS I
B-2C9-?W I I 8-Cre-?W I
INB-C04-PW I
B-350-PW I
B-351-PW I
B-312-PWS I
B-312-PW I
18-305--PW 1
B-011-?W I
B-045-PW I
8-355-0PW l
B-355-?W I
8-047-PW I
8-013-PW I
"B-001-PW I
8-01"-PW I
B-002-PW I
8-356-PW !
"B-310-PW I
B-017D-PW I
B-017-PW I
8-018-PW I
"8-019S-PW I
'18-019-PW I
B-021-PW I
B-C01-PW I
B-033-PW I
8-033S-PW I
"B-034-PW I
8-352-PW I
B-307-PW I
8-048-PW I
•18-049-PW I
"8--...SCS-PW I
NB-311-PW I
8-253-PW I
8-003-PW I
•18-037-PW I
8-038-PW I
15-13
15-18
15-18
15-18
15-18
15-18
15-18
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-'18A
15-18A
15-18A
15-18A
·15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-10A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
2.01
2.01
3.05
4.CS
4.08
12
12
21
29
31
39
40
43
43
46
52
58
I S8
I 61
I 62
I 62
I 65
I 78
I 96.01
I 96.01
1 99
106
108
I 108
T
I
I
I
1cs.m I
110
112
112.01 I
112.02 I
112.m I
114 I
116
510
510
528
180·
180
110
4CO
I 140
I . 140
I
80
I
64 I . I
10J 70
100 70
I
I
UG/L
5.CO
1.CO
1.CO
1.CO
1.CO
Al . A I
UI
UI
UI
ul
UI
5.CO U I
5.CO U I
5.CO U I
1.CO U I
1.CO U I
5.CO U I
i:0.00 u I 1.co U I
25.0J U I
· 1.CO U I
I · 1.CO U I
I · 1.CO U I
I -·5.CO' .... U I
I 5.CO U I
I 5.CO U I
I 5.00 u I
I .5.0J · u I
I · 5.00· U I
.5.CO. U I
· 5.00 U I
1.00 u I
1.00 U I
5.CO U I
I 5.CO U I
130 105 I 1.00 u I
>80
130 1CO I
3CO -3...i::o I
c.cC A I
1.00 U I
1.00 u I
4.20
5.CO
5.CO
Al
UI
UI
UG/L
0.94
O.E3
5.CO
1.CO
1.00
1.CO
1.CO
5.CO
5.CO
5.CO
1.CO
1.CO
5.CO
i:O.CO
1.CO
25.CO
1.CO
1.CO
1.CO
5.CO
5.CO
5.CO
5.CO
5.CC
5.CO
5.CO
2, .-:c
5.00
1.00
1.CO
0.50
5.CO
1.00
1.00
1.CO
1.CO
0.80
5.CO
5.00
AJ I
AJ I
Ui
UI
UI
UI
UI
I
UI
UI
UI
UI
U I
u I
u I
u I
u I
u I
UI
UI
UI
UI
UI
u I
u I
u I
u I
U I
u I
U I
AJ I
UI
UI
u I
U I
u I
AJ I
B-302-PW I 15-18A 116 I 300-350 I 1.CO Ui I.CO
u I
u I
u I
B-301-PW I
B-039-PW I
8-357-PW I
8-040-PW I
118-042-PW I
18-041-PW 7
, 18-203-PW I
1· 18-044-PW I
118-259-?'N i
, IS-254-?'N I
\!c,9/TERIA
I
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-18A
15-l8A
15-l8A
15-ISA
15-18A
North 3eirilcnt PCE Site
,q~rnedial investigation
118
118
119
121
123
123
125
127
128
"!32
128
142
i'lorih Se!rnont. Gastcn County, i'!C
SCSO ~roject i'lo. 363-058/Jur:e. 1397
3CO
3CO
1CO
140
1C5-110 I
ao 1
·140
€0 so
ED
55
so
1.CO
5.CO
1.CO
5.CO
5.CO
5.C0
1.CO
5.CO
0.62
·1.co
ul
UI
UI
UI
UI
UI
UI
J I
UI
AJI
UI
0.70
5.CO
1.CO
5.CO
5.CO
5.CD
1.CO
5.CJ
1.CQ
AJ I
u I
UI
UI
U I
u I
Ul
U! u i
u I
tJ I
S.c::: U l ;::,.-_-...; IJ !
UG/L
1.CO
5.CO
5.CO
1.GO
1.CO
1.CO
1.CO
1.50
5.CO
5.CO
5.CO
1.CO
1.CO
5.CO
50.CO
1.00
25.CO
1.CO
0.87
1.CO
5.CO
5.CO
5.CO
5.C0
5.CO
5.CO
5.CXJ
1.30
1.10
5.CO
4.€0
5.CO
5.40
1.CO
1.00
1.CO
3.CO
5.CO
3.CO
1.CO
3.40
5.CO
5.CO
5.CD
1.CO
1.CO
5.CO
1.CO
·J.CO
! -UG/L
U I 1.CO
U : 5.C0
U I 5.CO
U ! 1.CO
U ! 1.CO
U I 1.CO
U I 1.CO
I 1.CO
U I 5.CO
u I ·:.a7
U i 5.C0
U I 1.CO
U I 1.CO
U I 5.CO
u I ::a.co
U I 1.CC
U I 25.CO
U I 1.CO
AJ I 1.0J
U I G.S3
U I 5.CO
U ! 5.CO
U I C· . .::.:: u I o.e4
U I 5.CO
U I 5.CO
I 5:CO
I 5.CO
U I 5.CO
A I 1.00
A I 1.00
A I 5.00
U I 5.CO.
A I 1.CO
U I 1.CO
U I 1.CO
U I 1.CO
A I 1.CO
U I 5.CO
A I 5.00
U I 1.CO
A I 1.CO
A ! 5.CO
U I 1.CO
U I 5.CO
U i S.CO
u I 50
U I 1.CO
U I 1.iO
U 5.C:J
u ·1.co
U S.CC
a I
u
u
u
u
u
u
u
u
u
AJ
u u
u
u u u
u
u
u
AJ
u
u
AJ
AJ
AJ
u
u u u
u
u u
u
u
u
u u
u
u
u
u u
u
u
u
u
u
u I
u i
U I
u :
lj I
u ,1 u ..
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T,,,.SLE 4-125. i',1AIN lNORGAilJIC CONTAllllNANTS IN THE '3'N ?LUME, RESIDENT!AL DRJNt-<lNG 'NATE:'< WELLS,
SEPTEMBER 1996 AT THE NORT:-i BE• MONT PCc SITc -
c:::;73.71r,1u ~-"\~ ..... i:::::1 "'" I 7N ill 0 fl.., I ,.., I c;, ,., 11
UNITS I UG/L UG/L UG/L I UG/L I NB-004-PW 3.05 5CC0 30 5S.C 23CG I NB-013-PW 43 27 50 u 2.5 u I 20
NB-038-PW 116 5400 7S 31.0 25 u
NB-041-PW 123 150 50 u 2.9 93
NB-350-PW 4.06 16 40 u 2.1 18
•8-351-PW 4.08 8.3 42 2 40
•8-352-PW 106 9.8 59 3.8 97 I •8-353-PW 112.02 400 40 u 2 u 10 u j •8-354-PW 138 3.7 ., <AO· u ? u 10 u -<·
18-355-PW 40 87 -:.•'<' , · .. -,,io: . ·: .•·· .. u ? u 10 u
"B-355-PWD 40 ·as•:·•· ''.:;,::-: · ·40 ::: · <::•, u··. .... 2 u 10 u
"B-356-PW 46 ·.c ,31: ,.· \(: 40 ··:u'·· .. 2 u 15
"B-357-PW 119 .. •-A.a .... _•y 40 ... u.-. ,I 2 U . 38
<8-359-PW 132 ··-2,T 40 . ·.· u .··.·.1:0:. 2 u 63
CRITERIA 5000 ,,, 50 -200 ,,, 50'11 300 ,,,
l\lnTF· <1> f:;R~!:'i\J v""1",.,r-, pv.-...,,_0.-1 ~--...... n.-1 ...... , Mr.I c:. >r ,,i ·.-... ·;·_:_.-. /<(>·•: .. -::_:_,_:·.·.i :·.:<//. /_-·:::·:<··_::_ .;.· ··:--·,· .. ,:·
4.4 QUALITY ASSURANCE AND'ciDALIITYCONTROL ...... , . .-.,._
Quality Assurance/Quality Control (QNQC) procedures began in the planing stage and
continued through sample collection, analyses, reporting and final review. The field project
coordinator had overall responsibility for field· QNQC. All samples were collected in general
accordance with Section 5 of the EISOPQAM: The QNQC procedures described in this
manual insure that representative samples were collected from the various media sampled.
Split/duplicate samples were collected for ten percent of the samples collected. The split
samples provided a checK on sampling technique and laboratory analysis. The duplicate
indicated the variability across the Site. Vl/ater trip blanks were prepared with organic free
water for volatiie organic compound analyses. The trip blanks were handled and stored with
the samples collected from the Site. This pro•1ided 2 chec!< to determine if sampies may have
been conisminaied duiing handling and stcrgga. E:;uipme::I rinse bian1<.2 'Ner,~ ccll-act,;d ·?:.:<ft\
equipment clecned en sHs: us:ng orgenic-'ires ,,va·£c:: end anei~lz--sd 'for ·ihe Target ·,:}Jrnpound
L!st!T2rget )•.naiyt-2 Lis·£ (TCL1J,:1.L) -::::•mpcunds. =-·:;uipmen·t ri;;s.s G!.snks .. Ner3 c::Jl!ec£fsd -~0
Mort;, 8:slmcnt PCC Sit~
R~med!a! lnvest:gatcn
North Beimcnt, Gas~on Couni'j, i'!C
SCSD Project No. 96S-053/June, 1S97
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TABLE 4-13A. QA/QC SAMPLES AT THE NORTH BELMONT PCE SITE, MARCH/NOVEMBER 1996.
i t\·STAl'loN:1i>/1:('i !<,;: :/~/•-~:. :·: /j~DATE.'.:}r.L:t/ih· ' \} "i:)(?\f;:;.:}::•;:_~(/~QNQC .)f.i/}Jt{{·;;::,: ?,"I!~
\18-901-FB Mar-96 Field
\18-902-TB Mar-96 Trio
'lB-903-WSB Mar-96 Water Source
\16-904-QFS Mar-96 Organic Free Svstem
\18-905-ERB Mar-96 Equioment Rinseate
'JB-906-WSB Mar-96 Water Source
NB-907-ERB Mar-96 Eauioment Rinseate
'lB-908-ERB Mar-96 ~,t;:~?i~ Eailioln..nt Rinseate
\18-909-ERB Mar-~&it~Jt~ E'aiiin\We1ifRinseate
\16-910-TB ..,-..,.;,..:.,.,@.!~'"·'····• .. -:-:if.;~~it~~ ... n .,J(.fi¼.,.~~ ~ ...
'JB-911-PB w--Pres~Nffilc Mar..
NB-912-TB ·l'.'!,;.-Tio rr&~~~ . Anr' n -~;::;q. • -~ ., •
\18-901-TB Jur\f""',. Trio ~~~4 r.i
'lB-902-0B Jun-96 ,.,., OrQanic Free Svstem
\18-903-FB -J 'n!-96:~;t!'.0''.!:.i''==,.-.. 1 u ,"(.':!":',;.~,'fi':.~..::,'{:,,; ererct~:Q!~~~~~!'1:0~-;
\IB-904-STB ~ J ··~~it:1~~~~ ":i)i~~{-t1g:~~it .... ,ii urr.: ~-~•~;-:, I''"" 11 I'~-".-::,.,.~~i~\~<;¥_.-
\~ ·--:~·:t:<:;Jun-"·~""_ -~,o:.."'y:;,'!:+;J~p--·.r~---'*r.,~ .. ;:,.. .,.-\IB-905-RB
\IB-906-FB
NB-907-WTB
'lB-908-STB
\18-358-TB
~B-001-ERB
NB-001-QC (TPB)
~B-001-TB
IJB-002-QC IWSBl
\18-002-TB
\18-001-EB
\IB-002-EB
'JB-003-EB
'JB-004-EB
\IB-005-EB
'lB-006-EB
\18-007-SB
IJB-007-SBA
, .... ----TR
North Belmont PCE Sae
Remedial Investigation
\;, Jul-'96·-.,,,_
·\ Jul-96,.· .. ~i·:-W~~~-
''·':. Jul-96 --cl'i ..
·-,,sent-96 •· . .r:.:
6cts96 'fo,
.. :··."·.-':":-\( : ,,,i:·oct:9EL .. ! ·:\\
···:;;;,J,.:••;',t,,:Ocil95\'!,;/;fs,;;;",':;',
.-.. ,:·\fOcf;96·:~'~fri-N-?S'.,:/::,::;-;
oci~96"" ,--;.,:','.:,'.."",.'" .·,.
Nov-96
Nov-96
Nov-96
Nov-96
Nov-96
Nov-96
Nov-96
Nov-96
l\lnv_O,,
North Belmont, Gas1on County, NC
SESD Project No. 96S-068/June, 1997
uinmenfRmseate .,1;,•·· '.;'
._ .. -:,"~'';<"l''"':'~"•l-1" ~.1er 1~*~~J:t.., .... mnP~1¢;µ,"' ·· .,? ;.·-·
t/ip ,?' .:N~
Trio :Y . .rt
Eauloment Rinseate
Trio arid Preseivatives:'//ti:· ,•,, ..
Trip /ii,'"· . . if~!;:,,:, .. , .
Watifo'Sourcef,.: ·:)';f'•
Trio , '.:.".:-,:,.<,.;,,
E:auioment
Eauioment
Equioment
Equipment
Equipment
Eauioment
Oraanic Free SV!atem
Oraanic Free SV!atem
Trio
if,'";'f'tiMATRix::;1,;,,;,t\\~
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Soil
Water
Water
Water
Soil
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
Water
\Al~•a•
4-23
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.;LE 4-13B. QA/QC -voe SAMPLES AT THE NORTH BELMONT PCE SITE. MARCH/NOVEMBER 1996.
"B-901-FB 5.0 u 5U 5.0 u
"B-902-TB 5.0 u 5 u 5.0 U
NB-903-WSB 5.0 u 24 5.4
"8-904-QFS 5.0 u 5U 5.0U
JB-905-ERB 5.0 u 5U 5.0 U
~B-906-WSB 5.0 u 25 5.5
JB-907-ERB 5.0 u 5U 5.0 U
JB-908-ERB 5.0 u 5 u 5.o.Ulrf
JB-909-ERB 5.0 u 5U 5!0~(';,
JB-910-TB 5.0 u 5U 'stntl:,;; r.': ;O;_, ~ .. ,,.-
JB-912-TB 5,0 u 5U .li}S!~Vftl.
JB-901-TB 1.0 u 1 u K~1ct:iitl~
NB-902-0B 1.8 A 1 u ··-·1.o·(r-
\ " NB-903-FB 1,0 u !?•;-,,.,,~ u
~•"1,o·l!l~:, -~-: itir0rlt::i~
~B-904-STB 46.0 u :',.feh}~;. 46:ot.tf~
~B-905-RB 1,0
106-FB 1.0
d07-WTB 1.0
JB-908-STB 56.0
JB-358-TB 1.0
~B-001-ERB 1.0
JB-001-QC 1.0
~8-001-TB 1.0
~8-002-QC 1
'8-002-TB 1.0
JB-001-EB 1.0
NB-002-EB
NB-003-EB 1.0
NB-004-EB 1.0
NB-005-EB 1.0
NB-006-EB 1.0
NB-007-SB
~8-007-SBA 1.0
'-'8-008-TB 1.0
.n Belmont PCE Site
Remedial Investigation
u
u
u
u
u
u
u
u
u
u
u
NA
u
u
u
u
NA
u
u
·,·'.h1 u ·., ·.;:,\
1;u
1 lA
56 U
1 u
... ,tu ·•
·.?1.'u:/-'
1-'0'":
32
1 u
1 u
NA
1 u
1 u
1 u
1 u
NA
1 u
1 u
North Belmont Gaston County, NC
SESD Project No. 96S-058/June, 1997
... "e:.,1:oi~ b-·-,;;,. -q~
1:0,u
1.0 U·
56.0 uc:;
.. 1.0 u
-~., .. . 1;0 U
. ·.1'.0.Ui :to•.u·,,
•·.fs"t:'.',',
1,0 U
1.0 U
NA
1.0 u
1.0 u
1.0 U
1.0 u
NA
1.0 u
1.0 u
5.00 u 5.00 U 5U
5.00 U 5.00 U 5U
0.70 J 5.00 U 5U Water Source; did not treat
samole for chlortnation
5.00 U 5.00 U 5U
5.00 U 5.00 U 5U
0.69 J 5.00 U 5U Water Source; did not treat
samole for chlortnation
.,.,;;;:s'ocEi!lli., :,.:.-~ 5,00 U 5U
;~\4fi.5~QO;t:W?: ·?ffi:..~{4~.00 u 5 u
;~t~sfoofUilit \~~Xsloo u 5U
\~i~~OCi"U~ ~;g~3,s~oolu 5U
flit 5.00 U ~t~fSiOO'-~U. 5U
i~h 1.00 U /~~.ft1oo~U~ 1 u , __ ,.... ;:=--1. 00 u
..,. ..,,,,,;.;~;,,. 200:s: 30 JN Camon filter breakthrough;
,;(, l!:. ,~ chanaed filter
~1~rr~11iij ~tifiRttf 1 u Background; odor observed in
air
it~(~':ri0Jfu1-?5 ~Jt.~-46100-\J -.fc:'· · 46".i.J
ii;tl!~lfi rifJf97,J:F; >· i1 u Background; see field blank .. ;,
NB-903-FB
. •~.;~1~00-Yirft!H -;::;,J,'' 1:60 U 1 u
1.dou ti.oo u 1 u
56.00'iU :·.,.56.00 U . :• 56 U
1.oii'u 1.00 U ;· 1 u
1.00:u 1.00 U ,., L:·::_;· .... 1 u
1.06'.u i-.fiJ6 u\' •:,>.;:",:· fu
.· -'· 1.0()iU :-t:1oo u/ ,'.:-~;~-1 u . <_,·\:4?;;:./:; . , u . 1 u Wat.er Source; did not treat '< •, •.•C••, ,.
samole for chlortnation
1.oo·u 1.00 U 1 u
1.00 UR 1.00 u NA
NA NA NA Sample not received by CLP
laborat.orv. misslna
1.00 UR 1.00 U NA
1.00 UR 1.00 U NA
1.00 UR 1.00 U NA
1.00 UR 1.00 u NA
NA NA NA Sample not received by CLP
laboratonr missina
1.00 u 1.00 u NA Organic Free System Blank to
reolace NB-007-SB
1.00 UR 1.00 U NA
4-24
----------

-
-

-

-
--

-
-TABLE 4-13C QA/QC -INORGANIC SAMPLES AT THE NORTH BELMONT PCE srI "· MARCH/NOVEMBER 1996
JB-903-WSB 50 U
~8-904-OFS 50 U
NB-905-ERB 50 U
,B-906-WSB 50 U
'JB-907-ERB 50 U
'JB-908-ERB 50 U
NB-909-ERB 50 U
NB-911-PB 50 U
NB-001-QC 50 U
"B-002-QC 50 U
NB-001-EB 130 U
'JB-002-EB 20 U
'JB-003-EB 20 U
'JB-004-EB 20 U
'JB-005-EB 20 U
NB-006-EB 20 U
~B-007-SB 20 U
North Belmont PCE Site
Remedial Investigation
11.0 28.0
2.5 U 2.5 U
2.5 U 2.5 U
12.0 28.0
2.5 U 2.5 U
2.5 U 2.5 U
2.5 U 2.5 U
2.5 U 2.5 U
2.5 U 2.5 U
12 34
4U NA
1 U NA
1 U NA
1 U NA
1 U NA
1 U NA
1 U NA
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
210.0 3300 2.5 U 2.5 U 2.5 U 1300
2.5 U 120 U 2.5 U 2.5 U 2.5 U 25 U
4.6 120 U 2.5 U 2.5 U 2.5 U 25 U
230.0 3100 2.5 U 2.5 U 2.5 U 1300
2.7 210 2.5 U 2.5 U 2.5 U 25 U
6.3 120 U 2.5 U 2.5 U 2.5 U 25 U
2.9 120 U 2.5 U 2.5 U 2.5 U 25 U
2.5 U 130 2.5 U 2.5 U 2.5 U 25 U
3 U 120 U 2.5 U 2.5 U 2.5 U 25 U
2.5 U 1600
26 , 70 U 1 U 1 U 20 U
82 1 U 1 U_,, 2 U 20 U
.6.u . ,: :>2ou < ···,J .. l/i.k.·1:U.; · 2 u 20 U ..
2.5 U 21 13000 5 U 1500 Water Source
2.5U 12 U 500 U 5U 500U
2.5 U 12 U 500 U 5 U 500 U
2.5 U 12 U 13000 5 U 1900 uVater Source
2.5 U 12 U 500 U 5 U 600 U Tap water residual;
see NB-906-WSB
2.5 U 12 U 500 U 5 U 600 U Tap water residual;
2.SU 12 U
2.5 U 12 U
2.SU 12 U
2.5 U 12 U
50 700
16 140 U
2U 20U
2 U 30 U
3 U 20 U
1 U 70 U
1 U 20 U
see NB-906-WSB
500 U 5 U 600 U Tap water residual; ,
see NB-906-WSB
710 5 U 600 U Constituents not a
500 U SU
18000 SU
160 U 61
160 U 6J
160 U 1 U
160 U 1 U
160 U 1 U
160 U 2 U
160 U 1 U
500 U
1600
100
49 J
37 J
concern
Water Source
Used purging decon
versus samDlino decon
Used purging decon
versus samolino decon
Tap water residual;
see NB-002-QC
32 J Tap water residual;
see NB-002-QC
31 Tap water residual;
see NB-002-QC
33 Tap water residual;
see NB-002-QC
22 Tap water residual;
·--~ ..... ----Or.
-
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TABLE 4-130. QA/QC -BNA SAMPLES AT THE NORTH BELMONT PCE SITE. MARCH/NOVEMBER 1996.
;':l>t.ATION?i CCPO\;'Q, CCHEXi,'.Q\ '.DCCHSC:}\Q': C:MBFi,,Q,J Bis::.etHER'ti_Qi iBENiriisi:rnvt'.tiiQ\ UNKNOWNi;C <~:f}\t~t~:j?t:>~: UYf~f;t~tI :?~:/t<4?f;.f~~l l:.:~~i/·},\'/:i:/i//:t ·:~,\it:-:\?(~.?:: .. ·,::-\t?.fi}itYP.?fVt/?} ttf:i;fpH'fH:,{~?/.t?tt'. r:t:~t~·.-.Y }t,_·;'. ·.-:·:: .. }~/
'16-903-WSB 30 JN 200 JN 60 JN U 10 U 10 U U
\16-904-0FS U U U U 10 U
'16-905-ERB U U U U 10 U
'-'B-906-WSB 20 JN 500 JN 200 JN 20 JN 10 U
'16-907-ERB U U U .JJ.,., ,,,,~... 10 U
North Bernon! PCE Site
Remedial ln""51igalion
10 U
10 U
10 U
10 U
10 U
10 U
1 J
10 U
2U
3.4U
5 UJ
SU
5 UJ
SU
SU
SU
<; 11
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
30 J
I
-\:
North Selmon~ Gaston County, NC
SESD Project No. 965--058/June. 1997 4-26
.. . ... , .'\(.;;::-;¼:;
I ·:• -,..:::: ~ . ~' -:.:►.~• .-' .. .. . :.~) ..
Figures 4-12 thru 4-17 .:<2;:.._
I ",½~f·
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North Belmont PCE Site
I Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S--058/June, 1997 4-27
--
562000
561500
561000
560500
560000
559500
-
I 1386500
,~EPA
--
i 1387000
--
·1--·
1387500
---- - - ---- - -
1388000
---·i-------
1388500 1389000
EASTING, feet
.. ' " _;1 / ,' .. :
-----r--·------T--------··-···-··--·---1
1339500 1390000 1396500 1391000
ugll
,0()
15
10
5
FIGURE 4-12 BEDROCI< GROUNDWATER PLUME (BEDROCK MW and POTABLE WELLS) NOT TO SCALE
PCE CONTAMINATION, OCTOBER/NOVEMBER 1996
REMEDIAL INVESTIGATION REPORT
-
~g~i~ :~~~g~i, ~~~~i~Etci~~i-°v,5~~E ·i..>~.~?~;~}~;j~}i:~ tl
--
~.(i I l)t)C,
:.r.o::.oo
f,fiOOOO
-
I 12,UW:iOU
-
.-1 llh
-
llJ,j
'
J.Ji'lji'(l(JIJ
-
. .. . .. . I. ..
1. ,.
' I
I IJU/500
- -
........... 1. .
'
1·
l38Ull00
-
138850ll
:/ -
if ff
ii
-
_//
·· 1
1389000
EASTING, feet
-
... l..
1··
1389!:iOO
-
· ~IW11 ii)
-
1390000
-- -
.... L
,.,. ...
)
l
... r.
1300500
.I
_. .. ' ;"
I 1391000
--
ugll
10
5
-------. -.· .. -·· . -.. -. --... --' -..•. --'. -... , . ••••••-••••••••••-• ••-· .,., , C...........:.-•---~ .......... .a.. .. _.. ........ _,,._....,,.___.., ___ -........................... ~ .................. .;,.__...._......_:..;.....,__.~---'--''-;..,;,.;a._:_;~.;,...;....._L..;.•.:...;.~L-:,_C..:....:...;.;..;._;-_.:_;;_;-_.:,__;;..,;_~ •.
l'IGUHE •l-13 IIEDHOCI( GROUHDWATEfl PLUME (BEDROCI< MW ancl P<YIA!lLE WEI.LS)
TCE COIHAMINATION, OCTOllER/NOVEMBEH 1996
REMEDIAL INVESTIGATION REPDrH
NOIHH BELMONT PCE SUPERFUND SITE.
/\lnRTH nF I flA()I\IT ~A,,q r(\l,I r.nt 11,rrv hlr.
i'IOT re, SC/\Lt:
0 c.
"' ~· .
" D
--
562000
561500
561000
560500
5130000
i
559500 I ;
- -
'·-
,i / 78.
I
i• ' ·' .
I 1386500
-
' ' ;
C '..' (JI" . ·Li_
1·
131l7000
. --T ---------··--1
1387500 1388000
- - - - - - -
.. 1 ... _____________ J ________________ ••••. I.
t I
I
1' . I
----,--· ----· --·-T-·-·-
1388500 1389000 1389500
EASTING, feet
... ,--··
1390000
J
(
I 139050(1
--
. ...... 1
I 1301000
--
lf)U,
1-ICI
711
AL~--·------~-------~~-~~~~---------------------------------~··-~··~·"·~~---------··.i···---······--., ---___ ....
FIGURE 4-H BEDROCI< GROUNDWATER PLUME (BEDROCI< MW and POTABLE WELLS)
CIS-1,2 DCE CONTAMINATION, OCTOBER/NOVEMBER 1996
REMEDIAL INVESTIGATION REPORT
NORTH BELMONT PCE SUPERFUND SITE
NORTH BELMONT, GASTON COUN1Y, NC "·:"':! f:;~ ; .' ·
, '"
NOT TO SCALE
-
m z
- --
1000
- - --
()
SCALE
- - - - ---- - --
·IQOO 2000 Feet
- - - - ----··-----------
·1000
I '
I \
.. -/
_,. / / (_;,. ____ .,,.-
\ \
()
·-· :a
roEPA
1000 2000 Feet
SCALE
s
Figure 4-16 1, 1 Dlchloroelhene Contamination
in Bedrock Aquifer
Remedial Jnvestlgallon Report
North Belmont PCE Superfund Site
North Belmont, Gaston County, NC
SESD Project No. 96S·058, June 1997
- - --· - --- - - - - - --- - - -
N ll'*t: s
1000 () 1000
SCALE
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5.0 CONTAMINANT FATE AND TRANSPORT
This section discusses the physical and chemical processes that affect contaminant
migration in matrices at the Site. The properties of the chemicals detected beneath the Site are
reviewed, and the interactions of these chemicals within groundwater and surface water are
summarized. Difficulties and concerns associated with their presence in the subsurface also
are presented.
5.1 POTENTIAL ROUTES OF MIGRATION
Contaminant presence at the Site js c1ppc1rei1Jtly a result of operational activities at the
former location of the Untz Dry Cleaners1cfur:\ngit8ii;years 1960 to 1975. During this period, .-, .. t/-.,·d"-, -,.:•.•~., ~::v _'.;, ... _ --,-~(:'. _,_. __ .-.:,:.-· , ...
typical dry cleaning solvents wer,e,1f~l1fe~~9J~!~~:;e,pzlf2Q(Tlent. Results of sampling of several
· matrices, including soil, sedimelj~1ffi,)1ifci:~;wafor-~~bgfgrogr:1dwater, by NCDEHNR in 1992 and
EPA in 1996 have indicated th~~~mtir'.!l'!J,ants asl9.2J~.t~~[!Mth dry cleaning solvents (i.e., PCE) .
and their potential degradation,)J5.rg{.liJ§1i0,e., TC_I;;~c;i§1~tf:?¼1JCE) are present in groundwater
beneath the site and have been detected in a local, unnamed stream northeast of the former
dry cleaner location. These coh.stitue.mt;s.1Jav.~notbe~n.,9etected in soil.and sediment samples. : ', ' •~•J-•"','>~,:._,.;,,-;;,,?•!-'• ,-'''.•"""':r~•••,"JJ.~:;'•,;;:,._,:,:, .. •~r] •\:i •••{,•,_.:,!"<'•_ -_>. The reader is referrEfg,to Sectio1:11~fqr'i!a\j:li$gµs§f.P.b{of(~l![iiple analytical results. ~-~;~--.. : :. · · h,-;,0:11~s{~A~-~~;~:t~:~~:~,:3;::;ri:;~~~;rs~:-: ,:;J.'··.•··-~
As indicated b9,previo~s,;k'~f?ttn~m~~~ri~~P.l~~rrii rout~s of migration for PCE and
associated degradation.products Vlithin'!lfi~J~°E?gI9fithe Site are principally through flow of water
. within the groundwater. ·Ccintinued;use ofgrou'ndwater,by local residents as a water source
and natural hydraulic flow of ground~ter wili}result in the continued migration and spreading of
contaminants. In addition, if groundwater is discharging to nearby streams, the possibility exists
that contaminants ml:ly_be detected in th~ surface Water bodies,if'he following paragraphs will
discuss the persistence otchh::frinated,t'ly'drocarbciris in the environment and factors affecting
the length of persistence.
5.2 CONTAMINANT PERSISTENCE
Although semi-volatile organic compounds, pesticides, and metals were detected in
groundwater samples from the Site, only volatile organic compounds were observed in
significant quantities above MCLs. Therefore, this discussion will focus on VOC properties.
5.2.1 Chemical Properties of Contaminants
From the perspective of groundwater and surface water contamination, the most
significant contaminant characteristic is solubility (Gorelick et. al., 1993). The solubility of a
solute is defined as the mass of the solute that will dissolve in a unit volume of solution under
specified conditions. The solubility defines the maximum possible concentration that commonly
occurs in groundwater or surface water, for any given contaminant.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESO Project No. 96S-058/June, 1997 5-1
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The most simple organic compounds are hydrocarbons, which consist solely of carbon
and hydrogen. Hydrocarbons can be divided into two classes, aromatic hydrocarbons, which
contain a benzene ring, and aliphatic hydrocarbons, that don't contain a benzene ring (Fetter,·
1993). Hydrocarbons such as benzene, toluene, ethylbenzene, and xylene (BTEX) consist of
hydrocarbon molecules combined with aromatic compounds.
Halogenated organic compounds are characterized by a variable number of single,
double, and triple bonds and the presence of chlorine, bromine, fluorine, or iodine. These
compounds are widely used and have been frequently found as contaminants in groundwater.
Tetrachloroethene (PCE), trichloroethene (TCE), and 1, 1, 1-trichloroethane are examples of
these compounds. Each of these chemi~J:\8?,~),tlow flammability and a high vapor density,
which makes them very useful as soJy_ei;itsJ§rJhe;d¢gr,$asing of metal parts. PCE and TCE are
denser than water, and if spilled on[ffiji~Foy~q,Jr\tciG'ahtities great enough to overcome the
residual saturation, may migrataj~e®~llyJd6WhWai:~ftf:if◊1!igh an aquifer (Fetter, 1993). They
are also soluble in water and C§P[qff[fffi~~'in a dissqlv~ri:£P.ti}:tse in the direction of groundwater
flow. '*tjflffift\:.. Jf:./!*J;?~!.f}[ff/
Regardless of whether a)iquitjljl> composedofa single type of molecule, such as TCE,
or a mixture, it is ttie:nature oftttfuVii1tetmoleccirahbdnding1iriithe liquid that contributes to its ,,: ---·:.,.·'''.. ·.-e.•_":"-',._~,,.,..-~~·•·"':: '.'.,: __ .,. ... ,,.~, .._ __ •'1.J -~ '.-'.' •. r ... _.,. •'$~', . . .-·_-. .
generally low solubility' iii.W,clter\~ii:\'Oii:i:s~WiJfi}).n:{inif~ s9Jt.ipiJlties ( e:g:; acetone) are referred to .. -. "" ,·,-.~--•'"-~".-;, •• _~••·-.,,-••• ,...,,;r.;_,~l-: ·,·;-,·,,,,,._, . .-.,,,,r • '_-_. •
as being miscible withwater.''Liquicsiwitl\i'ffiriitefsolubilit[es (e:g~, trichloroethene) are generally · ,. ~ ---,:=•,?,,:.::;~r,.'<.:,., ,-.... ;.• ,•r·;;:-,,:.;-,:c>',·:·;t '. ::: . ., ... ,,. .,-· · · referred to as immiscible with water;"eVeii;if;the;sblubility js•high. =.\;,,, -~-'c • "-r:'?f.:-j;f"{\'.§~f;,'.,!~•:. -· .}·
Low density immis2ible liquicl~;.or light{non-aqueous phase liquids (LNAPLs), will float
on the surface of the higher.clE;msity groundwater and surface water. High density liquids, or
dense non-aqueous ptic1s~Hqul_ds (DNAPLs)/sink througt,water.until they reach the aquifer or
surface water bottorh:iGci~qiirie,is an,example•of an LNl>.f?L,'ani:J?P,GE and TCE are examples of
DNAPLs. While these iiqu]ds'qo not:g9 co111pletely into solytion•in groundwater, they do contain
compounds with limited solubiiities iri.water (Gorelick efal., 1993).
5.2.2 Site-Specific Chemical Properties
The various VOCs detected in soils and groundwater at the Site are classified as
halogenated aliphatic compounds (HACs); i.e., PCE, TCE, and 1,2-DCE. Table 5-1 lists
physical properties for the various organic contaminants detected in soils (ranked by their.
aqueous solubility). Table 5-2 lists physical properties that can affect fate and transport of
contaminants in the surface and subsurface, as discussed in the previous sections.
HACs are characterized by open-chain structures; a variable number of single, double,
and triple bonds; and the presence of chlorine, bromine, fluorine, or iodine. HACs have many
applications, such as solvents, degreasers, dry cleaning agents, refrigerants, and organics
synthesis agents (Moore ·et al, 1984). PCE was the most frequently detected HAC in North
Belmont groundwater samples.
North Belmont PCE Sne
Remedial Investigation
North Belmont Gaston County, NC
SESD Project No. 96$--058/June, 1997 5-2
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In general, HACs have low to moderate solubilities, high volatilities, low to moderate
partition coefficients, high mobilities, and densities greater than water (Table 5-1 ). As a result,
they are relatively easily leached from the soil into the groundwater (if conditions are suitable).
Once in the subsurface, the HACs typically undergo progressive dehalogenation. Generally,
the time required for each step may be widely variable and degradation may or may not occur,
depending on subsurface conditions (the presence of nutrients, microorganisms, etc.).
5.2.3 Contaminant Transport -Groundwater
Surface and subsurface soils sampled within the immediate vicinity of the former Untz
Dry Cleaner facility have not revealed CClf,IJE!Jillr:tf!,(ipn by PCE and associated degradation
products. Leaching of chemicals fromt5_6i))i$\~ip;:ocess of migration involving the movement of
a chemical downward through soijil5y::gi§j:qor~tll3:ri:c5f$~er. Typically, the more precipitation, the ~.• ·Y'·~_-, •.. --_.,., -~ ·:·"·"':-~ . ..-.. :i.~ .~ ......... ,;<-~· ,,.,. ··-,_,;,'
greater the chance for chemical$1ttcfil~a¢1i\(Ney?;1~9()flJ1.$aching is a concern because of the . ,.·.,.,,.,r,,,~--z.,:,;-.-. 4-,. •• -,--...-·.--~ •• _.,., ,.
potential for a chemical to mov~~\,§~$m,~ihe soil ai;J$:f.£S??1~rninate the groundwater. Many
factors affect whether or not a[g:jifl"mj~[;f~aches i(l'/soi[;~cichiding solubility of the chemical, =~-••~•~~<-"'~~•,,,,, .:,-,.s,,~---~-~:,.,.i,,<·, ~,, -~-,.,L .-,. ,_ . ·,· . .;,
biodegradation, hydrolysis, dissociation, sorption, volatility, rainfall, and evaporation. A
chemical that is water-soluble gin_l~.E!~h. in .~oiJ,and)S::lil5.ely to be biodegraded by soil microbes.
If biodegradation is,fc:!Pifi, therir1.~l{fif1Jgifu~~(~~i-/iiYr:ji:fu~b:tJ,\chemicaLth}:it is insoluble in water
can be adsorbed in s9ili•r'n9ved'~Jl[iT~qil;p_agf~l~1~pdij.!i3.r;hapsvery slowly biodegrade, if at all.
· ·:·-'·\... ·:\)\: >-,_ :~:t:J!.fiff]iff~gi~~¾1~i1::~)t\'.]:J~ltf~~r/.. . . .,•. · · · . ::::~--
The presence oh::hlorinate.d nydfpJ;~Jp<5)\js)ci1tne unsaturated soils serves as a -· ',,.,, •'.-;"<.i•"-:··.J, . .,,,,,,• .;. . · renewable source of groundwater contamin'atii5h. As the water table fluctuates over time, the
saturated portion of.the flow system repeatedly comes in contact with contaminated soil
(Gorelick, et. al., 1993). Each rise of the watJr'. table.serves to recharge the contaminants in the
groundwater. Infiltration from above al~o ccintributes to the contaminant distribution in
groundwater. Once a cfieirriical enters the groundwater regime, severaltransport mechanisms
are present that may aid in thespre9ding of u,:e contamination. These mechanisms include
diffusion, advection, mechanical dispersion; arid hydrodynamic dispersion.
Diffusion is the process by which a contaminant in water will move from an area of
greater concentration toward an area where it is less concentrated. Diffusion will occur as long
as a concentration gradient exists, even if the fluid is not moving, and as a result, a
contaminant may spread away from the place where it is introduced into a porous medium.
Diffusion may also occur when the concentration of a contaminant is higher in one stratum than
in an adjacent stratum (Fetter, 1993) provided that the adjacent stratum has the requisite
porosity.
Advection is the movement of dissolved solute with flowing groundwater (Gorelick et. al.,
1993). The amount of contaminant being transported is a function of its concentration in the
groundwater and the quantity of groundwater flowing, and advection will transport contaminants
at different rates in each stratum.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June. 1997 5-3
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Table 5-1. Physical Properties of Organic Contaminants at the North Belmont PCE Site
Acetone ao.79
Chloroform a 1.48 a8200 a 160 a 1.64 a 1.95 a4.88
1,1-DCA a1.18 a5oso a 182.1 a 4.3E.03 a 1.48 a 1.78 a4_04
1, 1-DCE a 1.22 a 400 a495 8 2.1E-02 a 1.81 a 2.13 8 3.96
cis-1,2-DCE a 1.28 a 3500 oc 200@25E.c:. oc 3.34
trans-1,2-DCE a 1.21 a6300 .46i:i~~Jd%'.i¥!1 '''"' "' 0 384 ~~tf1'&/,-,,, · a 1.77 a2.09 8 3.96
Methylene chloride a 1.33 a2000 / ti);i14t~t~~l\Y~~ \1ii'-'~>'.lOE.03 \ u•1!-,s'::.~•'. ,;/i;,,.t •. __ ,,,
8 0.94 a 1.30 1.89
PCE a 1.62 a 150 (~< ~~'!S'tt':"~it ~ <>•,1,_.:~ i,)'"~~'~,r2:,i. a2.42 a2.60 aa.78 _.;,'>:<:'m1i.~.,., ,, . --~ . .t,;._, Gld :.!.>.·, ,>::;1_ • !lh'.!.
Toluene a 0.87 a 490;,,,,;, .;'.{,:'~~:-: ~~i~t:ff~~'.22 -~~·"l'<!~ gi'Q3 ~,~~ . .,.';!;_ .. ,,,,. ... ) a2.06 a2.65 8 3.77
1,1,1-TCA a 1.34 a 30()'1!>\/J ·--❖~'.!',-.. , /N~~irf.i99 tt7£:it}rjf6EXO:ti , ..• 1;; ••• ~.m,~ .... , .. ,.,~,---~•>: a 2.18 a2.48 a 5.45
1,1,2-TCA a 1.44 a4500 a19 a 9.9E-04 a 1.75 8 2.18 8 5.45
TCE a 1.46 a 11 Cl!)'°'"· : .,f•~if\~57 .a._,.~{1'.!f.~_, :,.-',;.,f,i:t~~~~-~,.8(~._,a?r,,jJ a 2.10 8 2.53 8 5.37
TCFM a 5.85
Notes: -= Value not pro\rjded .. '\ff~;;}{4l~i{f}\~J~~t~f}({il~}fi~t!~§i"° ,_:_._. _ .. :~_:>· .;JY ·
a= Montgomery, J.H., and Welkom, L.M:,J 990}@roun<lwate[((,tiemlcafli'DeskReference,,Lewis Publ., Chelsea, Ml, 650p.
b = Howard, P.H., et. al., 1991. Handbook ·of En0@jmehta!Deoradation Rates Lewis Pub[. Chelsea, Ml, 725p.
----
8 9.1E-06
9.SE.06 28-180 56-132
c 9.5E.Q6
c 1.1E-06 7-28 14-56
c7.5E.Q6 180-360 360-720
7-28
8E-06 140-546
8E-06 136-720 ...
c 8.3E.06 C 321-1653 .
4.415 180-360 360-720
c = Lucius, J.E., et. al., 1990. Properties and Hazards of 108 Selected Substances, USGS Open File Report, 90-408, 559p.
h "Tetra Tech, Inc., 1988, Chemical Data tor Predicting the Fate of Organic Chemica1s:1n Water, Vol.2, Database EPRI EA-5818, Vol.2, Elec. Power Res. Inst., Palo Alto, CA, 4·
i = Mendoza, CA, and Frind, E.o., 1990b. Adyectjye-pjspersive Transport of Dense Organic Vapors In the Unsaturated Zone, 2 Sensjtjyjty Analysis. Water Res., Vol.26, p.388-:
oc = Verschuren, K., 1983, Handbook of Envjronmental Data,on Organic Chemlcals:·2nd Ed., Var Nastrand, Relhold, NY, 131p.
North Belmont PCE Site
Remedial Investigation
, ,-,
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North Belmont, Gaston County, NC
SESD Project No. 96S.058/June, 1997 6-4 .
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Table 5-2. Ph•1sical Properties of Organic Contaminants
Sorption-
Soil Adsorption
Coefficient
(Ka,)
Mobility-
Based on a combination
of solubility(s) (mg/L) and
soil adsorption (Ka:h-,
\,·'·: ''\
<10
10 -100
100 -1000
1000 -10,000
.JS> ~(,.0.2 ~~d
.. , .2000 < K,./.< 20:000
.. _. •.::;{)(~12i~ii:.. . .
Volatility-H <3x10·1
Henry's Law Constant -3x10·1 <H <1 o.s (H)
(atm m3/mol) 10-6 <H <10·3
H > 10-3
Very weakly sorbed
Weakly sorbed
Moderately sorbed
Moderately to strongly
sorbed
Slight mobjlity
lm;;;;obile
Non-volatile
Low volatility
Moderate volatilitv
Hiah volatility
Little,
AD. Inc.,
1989
Cohen and
Mercer,
1993; Ney,
1990
Fetter, C.W.,
1988
Groundwater flow through different porous media occurs at variable rates due to the arrangement of particles in the subsurface. As contaminated groundwater travels through the stratum, the fluid does not all travel at the same velocity, and as a result, mixing occurs along the flow path. This mixing is !er.med mechanical dispersion, and it results in a dilution of the contaminant at the advancing edge of flow (Fetter, 1993). ·
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SES□ Project No. 96S-058/June, 1997 5-5
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Mechanical dispersion is composed of two contaminant front mixing methods -
longitudinal and transverse dispersion. Longitudinal dispersion occurs along the direction of the flow path, while transverse dispersion occurs normal to the flow path and causes lateral
spreading of the contaminant. Mechanical dispersion and diffusion combine in groundwater flow to create hydrodynamic dispersion. This process begins when a contaminant enters the aquifer. Once introduced, the advecting groundwater carries the mass of contaminant with it, and in the
process, the contaminant spreads, thereby decreasing the maximum concentration with time.
However, the contamination is now spread over a much wider area.
The adsorption of a solute onto an aquifer material (e.g., clay) results in a reduction of
concentration in the aqueous phase and c1_r;13tc1.rc:l<:1tion of the velocity of contaminant migration.
The degree of retardation experienced,_byiaJpifrtici:ilat{organic contaminant will depend on the fraction of organic carbon (foe) of tJ-)13~~qµif~f,.;ffi¥!tEiriaJ~'::~tlie, higher the foe, the more sites there :::·:~::~:~::~~::rt~1a::,,~1,,
During the NCDEHNR Site lnvestigatior:i;of June .. 1992;ia surface water sample was ·",.; 'J-'1,~,;·-·,•;-..::.~~·~, . · ,~~?:;:.,,; ·"•'.'·"'_ • •·"':.'"•••-'7-:, :-,"':;•,0• ,. collected "from near,th13 bridge qg:;~sm~}~<i~Az{a.P!?t§~t[h§ti!Y 1,200 fe~t downstream of the site drainage to the intermittent cr.eek'·k(N.GQ!=l::!NRr,)iL~~~ni~_i~"Sample was analyzed for voe content and revealed two compouA'clsl~t\6faab6◊edei~"E"fior1 liriliis. The two compounds and the • -.---···•':-:-;1•'.·_:;'!,,\:.~1-•t,;:1:;1.-,F· :~\--,,::•,~"·';~"'-:~· ·; · · concentrations of the compounds ~retr~*R~R!ltely/;-1\1, 1 :trichloroethane at 11 µg/L and PCE at 5 µg/L. The PCE detection was an estimat~d\ialue. During the October 1996 sampling effort by SESD, two comp9unds were detected in oi:i_e surface water sample. However, the
compounds, cis-1,2-dichloroethene and chloroform, were dete_cted at estimated concentrations.
. . . -::~-=-··-·· : _:_ ·:--_:./ r -.... :_, : .. -. .-_ ~, -:·... . . .-..
Once the contaminant has entered the regime of the stream; various processes, including
volatilization, chemical reactiqh; air:-waier el<change,· and bioi6gic interaction, will act to reduce
the concentration or degrade'the chemical f6rm .. Dependiiig Upon water temperature in the
stream and dissolved oxygen content of the wa"ter, the contaminant will diminish downstream
due to niass transfer to the air (volatilization). In addition, a contaminant in a stream that is flowing and has turbulent activity will partition substantially into air from water if the aqueous
solubilities of these substances are commensurately low ..
The reactivity and solubility of an organic chemical in water will also affect the
concentration of the substance. In certain situations, a chemical of interest may be involved in a rapid, reversible transformation in the water phase. Such a reaction results in the alteration of
the overall rate of diffusive transport. Depending upon the presence or absence of polar and
nonpolar compounds in the water, the organic chemical may bind to another compound
transforming the chemical.into another compound, become bound to another compound without
changing form, or not bind to another compound but undergo other reactions or transformations
(Schwarzenbach et. al., 1993).
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 5-6
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-~\~~~~'. ....... ;~;i?;:t
Organic chemicals may also be transformed by biologic interaction in surface waters.
Microorganisms, plants, and animals may uptake or act to bind the chemical, transforming the
chemical structure or removing the chemical from the possibility of further interaction.
Depending upon the biologic health and interaction of the surface water body, an organic
chemical may be rapidly transformed or affixed to plant tissues or other compounds via the
biologic agent. Schwarzenbach et. al., (1993) thoroughly discusses biological transformation
reactions.
5.2.5 Degradation Mechanisms in the Natural Environment
There are several mechanisms actiye.y,ttl;linthe natural environment that affect the
transport and persistence of chemica.[.;l1tjg~c,tl:i~~tWe re,leased to the environment. These
mechanisms include: ,f>;i':: ·1:.':~!'!';~~:~:· :·!;'.:::.,.,
~: ~~~~~~~s:~~~ati~i~, ~Ir }._.,i.•.•·•.·.•.·.,_··.~.:.,.·_:.-_:.·••·\··;.•.:.'..1.·.:.,.:_·• it•:;:.:t--•:e,~~-.,.";;;,:i.-;r,,i_;,j'fc~. ~,-'
3. Metabolic reactions/Bioaccumulation
~. ~E~~iP~.f'"~!il~;,~CY .
Each of these mechanisms;• exce'pff.9f1~9.rp1ioi1 which was discussed above, are
introduced in this section. . '\ . . ..,,,,.,;.,"''•"' ' •·
Phototransformation, thei,degradation ofa chemical through absorption of sunlight, will
occur as long as the chElmical.ciin.9bsdrb suniight, .and can occur in air, soil, or water, and on
surfaces of water, soil;'pl::ints/ahtjCa'11imals. Environmental influences such as depth of the
chemical in soil and water,:soipti9n,IC>ic:iil,'sensitizers, and pH, can have an effect on the rate of
phototransformation. The rate 6t-photofransformation is the time that it takes for a parent
chemical to be transformed to one-half (t½) of its original amount. This rate could differ in soil, in
water, and on surfaces. The faster the rate, the less likelihood of continued exposure in the
environment. If the phototransformation half-life is less than 30 days, then accumulation,
bioaccumulation, or food-chain contamination is unlikely; if it is 30 to 90 days, some food-chain
contamination is possible; and if it is greater than 90 days, food-chain contamination is likely
(Ney, 1990). .
Biodegradation is the biological process by which aerobic microbes or anaerobic
microbes break down organic chemicals to either a higher-or a lower-molecular-weight
chemical(s). This is a very important process by which soil microbes or aquatic microbes can
detoxify chemicals (Ney, 1981 ); however, the process may also result in the formation of a more
toxic chemical. Chemicals that are highly water-soluble can biodegrade, but those with low water
solubility usually will not. ·
North Belmont PCE Site
Remedial Investigation
North Belmont. Gaston County, NC
SESD Project No. 96S-058/June, 1997 5-7
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Reduction of the concentration of a particular organic contaminant due to biological
transformation does not ensure a reduction in toxicity. Many of the daughter products of
transformation processes are as toxic, or more toxic, than their parents. Biotransformation of
TCE, for example, can result in the formation of vinyl chloride, wnich is more toxic (and stable)
than its parent (Gorelick et. al., 1993).
Hydrolysis is one of the most important mechanisms in the environment for the breakdown
of a parent chemical (Ney, 1981 ). It occurs in soils, wi:iter, plants, animals, and possibly air. The
hydrolysis of pesticides has even occurred on plant surfaces. Hydrolysis is the chemical
interaction of water with the contaminant wnich alters the chemical's structure and, in turn, alters
its transport within the environment. Many -~gvifqnmental factors influence the rate of hydrolytic
degradation such as temperature, pH,.,$6IuqJ!)tf;:1surilight, ad-or absorption, and volatility. The
rate of hydrolyzation of a chemical,i~{t~~itim~lt~atit(~a~~s\for one-half of the original ••io•" "· .. , ;,·,s'•'"'••;,, ....... .,_. .. , .. concentration (t½) of the chemical[\9,l:5~¢9rrfe'tsfructtifc1lly'1=1ltered (Ney, 1990). -
iF;t~: d1fi? . -·:~~\\tfXft~~-\/t:'. .
Bioaccumulation is the up,ta ... · ~emicals byiafplanfor animal, and ihe storage of the ...:..,,.,.,. :' -•.,; •,-,:•-'.>• .. •·.. .• .. \ .•. ::,, __ .. c._,_ .. ,~.--.; -. •' chemicals or its degradation product within the tissues of that organism. Metabolic reactions
involve uptake by plants into thei_rroqt(sy~tem::l;and uptake by animals through normal feeding -.~.,,,,,~---•,r.t-:·,->-.: -.. ·-. ,·.~-".-· ., .• ,... -l." .· '· I'' . ::,_c'_•~·'•: •· __ ::
habits. These reactiop~produ_ce:,\t):it~:~PJi,\~~lffi~~sEl.fgi~J~,tx.J!,ites are ~-~-~ally translocated .
throughout the plant. •J,l.lso(i.§rnmal§fRIR.9,\JC:lf!gir:ne,tabphte,~,translocate toese throughout their
bodies. ·•· ; . . :i~~ff!i;'Jitrif;( ;T'.": ·•:: ·.· . ·. •·.
Dissociation or ionization of a\c:hemical'(fakes place in the solid, aqueous, or volatilized
state. The ionization takes place wnericthe che'mical becomes electrically charged through the
loss or gain of electrons. When.an atom; molecule, or ion loses electrons, it is oxidized; wnen
electrons are gained, it,is r~duced, The~e reactions are referred to as oxidation-reduction, or
redox, reactions. · ' :.>·-·' ">· ·
Oxidation typically involves ttielciss ofelectrons during a chemical reaction. In general,
substituted aromatic compounds such as ethyibenzene, naphthalene, and phenol can be
oxidized. Oxidation rates for aromatic compounds are typically an order of magnitude faster than
for chlorinated aliphatic compounds. Overall, abiotic (without biological life) oxidation of organic
compounds in groundwater systems is extremely limited (Olson and Davis, 1990).
Reduction reactions transfer electrons to a compound. For a chlorinated aliphatic
compound, this results in a less chlorinated compound (e.g., the formation of vinyl chloride from
1, 1-DCE). Dehydrohalogenation involves the loss of both a hydrogen ion and a halogen, and the
resultant formation of a double carbon bond (e.g., the formation of dichloroethene from
trichloroethane).
Aromatic hydrocarbons are typically flammable liquids that have lower densities and
boiling points than the chlorinated hydrocarbons. They are moderately soluble in water, have
high volatilities, high mobilities, and have moderate partition coefficients.
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 5-8
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Chlorinated ethanes and chlorinated ethanes have been found to undergo degradation.
Degradation is defined as the process of an organic molecule becoming smaller by chemical or.
biological means (Fetter, 1993). Figure 5-1 illustrates the degradation of PCE and TCE, due to
substitution, dehydrohalogenation, oxidation, or reduction reactions.
Environmental conditions influencing the type and rate of these reactions include pH,
temperature, state of oxidation or reduction, microorganisms present, and types of other
chemicals present.
5.3 SITE-SPECIFIC FATE AND TRANSPORT
5.3.1 Introduction and Objective . •·i~;;i\fJ~;c •?sl~:J~t. >;t~r'.·,,
Roy F. Weston, Inc., (WE§J;,Q('ilj)tp:,mpleted-~/:i\"§{lalytical fate and transport model for
the tetrachloroethene (PCE) plur:f!~'P9)1¥~ed in grou~·~ter:.in the saprolite and bedrock at the
Site. The objective of this modeljr:jg:~fl'.qctly.,as to estill)atefthe;distance that the PCE plume will ..-,~,.~ .,. ~-•~1,.,.-~,•,,.,. . . , ... :.• •. ;I,. . . _. travel downgradient of the presumed source area before degrading below applicable regulatory
levels (the Federal Maximum Cq_91~IT}]~.~pt_~Elf~J(~C\;),~Dd N,orth Carolina Drinking Water
Standards (NCDWS)'of5.0 micftigra'm&iper:'liteii)(µg/L)'l3hd the North Carolina Groundwater
Quality Standard (NCG\NQS) o(b/1:\rg1t;,::• \l(i'.f{ i}'.(i(:: . .••·
.... ?_ :·:•.'·-~-: . -··\.?\Mtt/fYi_.'.)J:&'.~\t'.··t~t(J?f> .. _-· _
The following text outlines the'fielc:l\~9tiyJ_ti,es completed, summarizes the methodologies
employed for the modelirig effort, arid_ disci.Js'ses'tne results obtained.
5.3.2 Background
I
The results of the environmental. investigation at the Site indicate that elevated levels of
PCE exist in weathered bedrock·(saprolite) arid competent bedrock groundwater. The highest
PCE concentration detected in the grciundwater within the saprolite was 2,500 µg/L in MW-6 and
the highest PCE concentration noted in groundwater in the bedrock was 3,500 µg/L in CW-6.
Consequently, this modeling effort has focused on groundwater in both the saprolite and the
bedrock. Furthermore, groundwater-quality data for the Site indicates that concentrations of
trichloroethane (TCE) and cis-1,2-Dichloroethene ( cis-1,2 DCE) were detected in excess of
NCGWQSs. However, these compounds were detected at lower concentrations and therefore
were not evaluated in this modeling effort.
5.3.3 Field Activities and Results
Groundwater level measurements, slug testing, and groundwater sampling performed by
WESTON were utilized in-developing the site conceptual model. The results of these activities
are summarized below.
North Belmont PCE S~e
Remedial Investigation
North Belmont. Gaston County. NC
SESD Project No. 96S-058/June, 1997 5-9
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.. ..:..,.,,J:.i.'b;t ----
5.3.3.1 Groundwater-Level Measurements/Hydraulic Gradient
In October 1996, groundwater levels were measured in monitor wells MW-1 through MW~
22 and CW-1 through CW-9 and referenced to surveyed top-of-casing elevations. Using these
data, a hydraulic gradient of 0.0298 foot per foot (ft/ft) and 0.0275 ft/ft were calculated for the
saprolite and bedrock, respectively.
5.3.3.2 Slug Testing
Rising head slug tests were performed in monitor wells MW-6 through MW-22 in January
1997. Using the Bouwer-Rice (Bouwer and.Rice, .:1976) and the Hvorslev (Hvorslev, 1951)
methods, hydraulic conductivities were}::Jiculi:ltecfaot'wells screened in the saprolite and in the
bedrock. Tables 5-3 and 5-4 displayiii'i~ihydr'i6ii2'Mridili'ctivities calculated from slug test data
for the saprolite and bedrock, re~p!:i9!lvi1YtfAppi?1~ix,Af~ritflins data and graph sheets for each
slug test method solution for eaq!jfttWf9j(oWwe11. 'ff{'\¥!~rr
· :f;:~f~t;_~f~t:1:i~~r.~,; __ .;~·~T;--:~>:r:;:r;~~:-·-
Table 5-3. Hydraulic Conductivities in the Saprollte at the North Belmont PCE Sile in January 1997
t•tt~~it;~~i.\tt~~wtJ11t:C6Mllbtiv .... <,'Wd:;-~-~---· ._ -"H·tJ\-:;i:,iJ~t~rt
~jq~~~if~~j~~t~t~ ~t/·: /J~(I}ttt~_.-._:·H~icil~~}.:!_,·~1;f})litL~
0.50
MW-7 0.71
MW-8 0.27
MW-9 .1.22 1.23
MW-10 1.57
MW-11 1.31
MW-12 1.91
MW-13 1.99
Table 5-4. Hydraulic Conductivities in the Bedrock at the.North Belmont PCE Site in January 1997.
lif~t~,1-;;tit;:::6:~:;,t;;;~;;;;;:~:;~~:;,: .. HJ~-~;~'·• -:~;;;-:::
MW-14 0.066 0.057
MW-15 0.55
MW-16 0.46
MW-17 0.52
MW-18 2.87
MW-19' 0.019
MW-20 2.06
MW-21 3.41
MW-22 2.38
NOTE: ft/day: feet per day
1 not used to calculate geometric mean
North Belmont PCE Site
Remedial Investigation
North Belmont. Gaston County. NC
SESO Project No. 96S-058/June, 1997
0.48
0.44
0.52
2.56
0.016
1.83
3.18
2.16
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The geometric mean of the saprolite hydraulic conductivity values is 0.98 ft/day and the
geometric mean of the bedrock hydraulic conductivity values is 0.90 ft/day. The data from well.
MW-19 was not used in the calculation due to its anomalously low hydraulic conductivity and
location (south of the modeled area).
5.3.3.3 Groundwater Sampling
Groundwater samples were collected from wells MW-4, MW-6 through MW-22, CW-1,
and CW-5 through CW-8 in October 1996. Samples were analyzed for VOCs, SVOCs,
pesticides, PCBs, and total metals content. However, for the purposes of the modeling effort,
only the VOC data will be utilized (see Sectio_pA.0 for the analytical results).
5.3.4 Transport Modeling Calcula!~/[1~ttJ~i~:Ij\I:i/t}t;;},··'.,;:\t
The analytical transport moc!el;BIQSCREEN .....asctised to estimate the downgradient
attenuation of PCE. The BIOSC~E~N;iro'otjel was dey~lo~~~-tl:>y the us Air Force Center for ·--·~-,.-.. ~•-.or.,>£---··· --r~, ,. ...,_ .. :·· --·. -. --•!-----~--Environmental Excellence (AFCEE)=ana EPA, and isl:Jased'oh the Domenico analytical solute
transport model. This model was developed toidetermine natural attenuation of fuel compounds,
but can also be usedJor chlorin~tfcl]cd"iri_i:jour:ids'iit:th~\fit~t:cof~er decay coefficient is used to
predict biodegradatio.ni'EllOS.~R~~~i!¥t~Yil);mi~ibl~t/fiR°~;f in that it allows the use of separate
decay ~oefficients for t~_e solute (gi:1\~~l~!~W/~A~~~l¥¢9ith~ source. It_ can also estimate
d1spers1on parameters from plume lengtht'\T:flE3;11JClclej\parameters input into the BIOSCREEN
model are presented in Table 5-5. 'lnput'§crJ'e'if~nh centerline screen printout for the modeling
effort are found in Appendix C. ''·
, ......... _ '--,< ·: .. \ _.' ·.
Table 5.5 BIOSCREEN Model Input Parameters for the North Belmont PCE Site
Hydrogeoloav
Hvdraulic Conductivitv /ft/davl
Hvdraulic Gradient (ft/ft)
Porosilv
Dispersion
Lona~udinal Disoersivitv (ft)
Transverse DispersNitv (ft\
Adsorption
Bulk Dens"" (a/cm'l
Partition Coefficient /K \
Fraction Or□anic Carbon
Biodegradation
Solute Ha~•lrre /vearsl
Source Half-Lrre /vears)
Initial Source Concentration /11n/L\
North Belmont PCE Site
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997
>0.98 · 0.90 Measured
0.0298 0.0275 Measured
0.10 0.103 Estimated from model
22.2 32.1 Estimated from olume lenath
2.2 3.2 Estimated from plume lenath
1.7 2.2 Davis & DeWiest, 1966
318 318 Montqomerv,1991
0.001 0.0001 Measured/Model Estimate
4 3.4 Howard et al, 1991/Model Estimate
6 8-9 /Howard et al, 1991/Model Estimate
25,000 17,000 Model Estimate
5-11
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Average groundwater velocity was calculated according to the following equation:
Velocity = hydraulic gradient x hydraulic conductivity
effective porosity
Using the hydraulic gradient of 0.0298 ft/ft, the geometric mean hydraulic conductivity of
0.98 ft/day and an effective porosity of 0.1, a groundwater velocity of 106 ft/year was calculated
for the saprolite. Using the hydraulic gradient of 0.0275 ft/ft, the geometric mean hydraulic
conductivity of 0.90 ft/day and an effective porosity of 0.1, a groundwater velocity of 87.6 ft/year
was calculated for the bedrock.
The retardation factor of PCE iQJt:iEi:i~~-il.pr~-~~nt~t the Site was calculated using the
foll~og ~"at;~ ~,~j(ii\
Where: R,i = Ret~rdatio_~,.Fact~~.. ;.
~: : -~~:~~~~~1~Iw;gi%:•$t'li~U~~r.~~i, . . . .·
K,,. = .. 0 Or arilcf.Gafbon!Eil'sfribution\ii6¢efficienif6r PCE
foe = Or~anii~G~~i, [f ititt}Ji~~[I-:. y•' .· .
Using a bulk density of 1. 7 g/cm3, an effective porOsity of OJ; an organic carbon
distribution coefficient•of 318 ml/g (Montgomery, 1991); and an average organic carbon content
in the soil of 0.001, the resulting retardation factor is.6.4 for the'saprolite. This retardation factor
was used to adjust the average groundwater velocity to reflect an,average contaminant velocity
in the saprolite using the foU0wing relationship: · · ->~;} ··· ' · ·
Where:. =
=
=
. . R =vN _··· , d -• C ,
Retardation Factor
Average Groundwater Velocity
Contaminant Velocity
Using the saprolite retardation factor of 6.4 and the saprolite average groundwater
velocity of 106 ft/year, the resulting contaminant velocity for the saprolite is estimated as 16.6
ft/year. Using the same equation and the values listed in Table 5-5, the contaminant velocity for
the bedrock is estimated as 51.5 ft/year. These values were entered into BIOSCREEN to
represent contaminant flow conditions at the Site. The modeling involved two stages: simulating
the current (October 1996) observed conditions at the Site following a hypothetical release, then
using the information derived to simulate future contaminant transport. To simulate the current
plume, a source of PCE was introduced into the model domain at the location of well MW-14.
The duration of the initial simulation was estimated based upon the minimum elapsed time (21
years) since closure of the Site (1975). The strength of the source, the seepage velocity, and the
North Belmont PCE Site
Remedial lnvestigatKln
North Belmonl Gaston County, NC
SESD Project No. 96S-058/June, 1997 5-12
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biodegradation values were adjusted during the initial time step until the predicted
concentrations approximated the current measured values (analyses from MW~. CW-5, MW-12,
and MW-8 were used for the saprolite model and analyses from CW-6, MW-16, CW-7, and MW-
22 were used for the bedrock model).
The bedrock groundwater was modeled in tv.u ways. First, the bedrock was modeled with
the source area located in the vicinity of well CW-6, due to the high PCE concentration at this
location. Secondly, the bedrock was modeled with the source area in the vicinity of well MW-14
with the ·groundwater at CW-6 treated as a migrating high concentration slug. However, this
model ultimately had tv.u problems. First, the model could not predict the PCE contamination in
well MW-22 (i.e., contamination could no!)?~,.m0<:l~.l~d as traveling this far) and the model
required a much ~realer source con~,W£~1\S,,~~~ajl~~r half-life than the solute ph~se._
Therefore, modeling CW-6 as the sgur.®1!0,<~~t19_rtqfJ!i_~iP.l=1drock groundwater contam1nation has ff.".>H-Jli'.r,t-;'.-:,:p1, ;.,...,:.·.-~t?!J.",:4 .-.-:-· ~~,,..;"'i:."'..:-:.-; .. · · --. been determined to be a more asa · · ·· -~presEfritaJ1g919!'frt!i~ chemical and physical
characteristics of the Site. i= ·t · ·-'J.i\
r, ~-3, .. &~l. __ ,,._iX~~ ·;tti}
Once the models had been calibrated, the predictions were repeated at five-year intervals
until all predicted concentratiori~~I§-il>.§],S?:«;g.)µ,_gt~,~P,)tRT.H9IL, respectively. The approximate
migration. distances t?mst~e so¼Jiji.,~~[s~jj§JP;j!IJ#L1R? 0. 7 µl_j!L iso-c_on~ntration
contours m the saprolttrarep,~es~p,ti~~f)&<!tll~~~-i~~~t!,'fap.pr?x1mate m1gr~t1on distances
from the source area for the 5:O,.µg/b'rao_q,Qt -llli,159:g::,ncentrat1on contours 1n the bedrock are
presented in Table 5-7}, •-'A",;.-:~~f(~ _Jt1.f\:{1~t~i"-
5
10
15
20
25
30
35
40
50
Note: µg/L = Micrograms per Iner
North Belmont PCE Srte
Remedial Investigation
North Belman~ Gaston County, NC
SESD Project No. 96S-058/June, 1997
.-~!
600-700
60()..700 700-800
700 800-900
700-800 800-900
720-800 900-1,000
700-800 900-1,000
600-700 900-1,000
400-500 900-1,000
200-300 900-1,000
100 700-800
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Table 5-7. Estimated Contaminant Mi ration Distances for the Bedrock at the North Belmont PCE Site
5 1.600-1.800 1.800-2.000 ·./ 11-------~------le-----....;.:.:""'-..;..c:.::.;;.. ____ l--____ ....:..:;=.:::.;:.::.;;.. ____ ---JI . ,,
10 1,600-1,800 2,000 ":\
15 1,600 2,100 .. ,: ll------'-'------4------""=-------le-------=-'=--------11
20 1.400 2,250
25 1,200-1.400 2,200
Note: µg/L = Micrograms per ltter
\_ j,_ / .), j;, .i Based on the input data and.rnodeliogfresults,itffie,eGE plume in the saprolite is predicted
to completely attenu'~!ft.~Er,!?w tfl~~~i~}tf~JJf~;'''",,iec ~roxim_~t,E~JYiSO years, and _below the
NCGWQS of 0.7 µg/L1¥"th1n:.~pprq?9Jp,a!~Jfi8~~ear . ·PC~;plum~11n the bedrock 1s predicted to completely)~ttem.iate_ oelq~l_!:i~M<? s. f1,§10; g/L/Nithin approximately 80 years, and ,.,-•"••'• ""7 ••• ,._.,:••?'-~~-·,.,,'!C•.~,-<=l:.ly:;;;"~,f --· ,, below the NCGWQS of'OJ µg/L wit~imiPR~*if:fi%t~ly"1"09iYears. .,,,.
~\.., ~i: ·.'.·,\ .. } ~.:-,}·· . Certain assumptions ~re madej_n the;~_bove ~lculatiOf!§land apply to the results described: ··.-,, i··· /,". ,,.· ,v
,,sr-:_:7'.~f-tf::/·:_:~::.<:\i",._;-.· 1 · ·:·,, i/_.-: ;,'.:~~{ .,-:~;:;tt\i;i~·:::;-:~}tiffl)it\·-_., .. 1. Concentrations'inffhe'wells:were asgumed tci':be',inclicative;ofthe center of plume at the
appropriate dista~"&froriliiri;:csour[~;?j} :r,i({riNtWil~¼Ifi'f(:i''-'
2. The PCE concentration in MW-6 and CW-6 are currently the highest concentrations in the
saprolite and bedrock groundwater, respectively and also represent the source locations.
3. The contaminant attenuation observed between the modeled wells is approximately
representative of conditions across the Site.
4. The direction of groundwater flow is horizontal and vertical flow between the saprolite and
bedrock is negligible.
5. The saprolite and bedrock are homogeneous, isotropic, and of uniform thickness.
6. Recharge rates are i.nsignificant relative to regional flow.
7, Groundwater flow directions and velocities are constant over time.
North Belmont PCE Stte
Remedial Investigation
North Belmont, Gaston County, NC
SESD Project No. 965-058/June, 1997 5-14
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5.3.5 Sensitivity Analysis
A sensitivity analysis was performed on the following variables utilized in the model
calibrations: effective porosity, fraction of organic carbon, and half-lives. These are the only
variables used in the model calcul_ations which were not empirically-determined.
Four successive model iterations were completed in which the value of one variable was
increased or decreased by 25%. Following each alteration, the time required for the plume to
dissipate below 5.0 µg/L was determined, as well as the maximum distance the plume traveled
above 5.0 µg/L.
The concentration of 5.0 µg/L wasi\{$'¢d?~~U~e-this is the MCL for PCE. The results of
the sensitivity analysis for the sapr,q!i!E;f~fe1PY.~~r,\Jg~zjgjr1J.c1ble 5-8. -
3
4
5
6
7
8
9
10
ii~!iiflltl.~1)'i,:•.f~~:iii~{1tig~~~
sis Results fiii:;lli~Ndith'.Belmont PCESHeModelln
Decrec!SE!: n 25% --~-;_t ,
Increase so~half 25%
Decrease so~h•a~.25%
Increase source-t{8ff.
25% ..
Decrease'souice-tiait-) ·. ·25%. ·-•r•:-•: •· ·
Increase source c6·nc:··'._.,:. 25% .. ·
11 Decrease source cone. 60
25%
Note: µg/L = Micrograms per liter
600-700/20
900-1, 000120
700-800120
800120
900-1,000/30
· 600-700/10
700-800/20
700-800120
700-800120
700-800125
The sensitivity analysis for these variables shows that, under conservative assumptions,
for each of these variables except source half-life (a 25% change in source half-life induced an
approximate 35% change), the plume attenuated to below 5.0 µg/L in approximately 60 years.
The maximum distance the plume traveled above MCLs was most affected by the solute
(groundwater) half-life (which also affected the timing of this event) and the fraction of organic
carbon.
North Belmont PCE Site
Remedial Investigation
.. , .. . ·-·•: ,~: ... ·, . 1·:..
North Belmont, Gaston County, NC
SESD Project No. 96S-058/June, 1997 5-16
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SECTION 6. CONCLUSIONS ANO RECOMMENDATIONS
The purpose of the Remedial Investigation conducted at the North Belmont Site
was to determine the nature and extent of contamination at the Site. Based upon the data
collected, the following represents the conclusions drawn, and provides
recommendations of additional work needed to be conducted prior to the remedial design
phase.
6.1 CONCLUSIONS
Groundwater
• Private \.I/ells 1a;~_,,;,v,, 1 J!Y of th~J ~ a ~, . ot been sampled since 1991 .
EPA's recent sampling indiC<lted that privat~ \.I/ells that were previously
uncontaminat~Jjc.!:!a .,_ Sl;f:f.i/" fa · ""'· . ~ntain the contaminants PCE,
•
TCt:ii:~~~'s~Efan' ',e -:,·,·ii(Ji,:tff'
Conia111inafion,pet '%,;.,t·,,~,-"-~~!\1,-l&;:i;,.,,J.aq~,ifer'appE:~fs to be localized in
Source. Area A (R,opersl$l'tQP.'Riog),:,efit~r,). $> · -~-\_ -:v.t~~:· -.J,,,~i%~~~. /rt· . _i:f .
Contaminants have rr.igrated(from the shallow aquifer into the top of . •
bedrock zorie,,~md int6t,the b~~rockj~quifer. ,t .
rtiJi}~·jf~'.~fith~fc.q;S;fuin~:6ts )h;~_e;i§0~~tifi~~J1bt the plume may •
be eitheffrom.sdur'ce•Afea.Aor'Source'Area··BY•'· ?·::~·.-.~~\':{f::.?;,xf:,}.r .. :::{!f': ' .:·-, .. ,.
·::/-;
• Soil samples obtained from Source Areas A and B did not reveal any
elevated levels of volatile organic contaminants. It is believed that the
contaminants migrated through the soil directly into the shallow
groundwater. Any contaminants in the surface soils would have
volatilized.
Surface Water/ Sediment
• Surface water and sediment in the area is not affected by the volatile
organic site contaminants.
Nor1h Belmont PCE S~e
Remedial In-ligation
Nor1h Selmon~ Gaston County, NC
SESO Project No. 96S--058/June, 1997 6-1
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6.2 RECOMMENDATIONS
The remedial investigation identified elevated levels of contaminants In the surficial
aquifer, the top of bedrock aquifer, and the bedrock aquifer. However, the following
additional work is recommended to fully characterize the extent of the groundwater
contamination at the Site:
• Additional monitoring wells are needed in the following areas:
•
Nor1h Bernon! PCE Stte
Remedial ln""51igation
Nor1h Belmont. Gaston County, NC
SESD Project No. 98S-058/June, 1997
·. /.
i ·:··.
I ···:
· ny of the residents' wells
. ~""' · ~ f 70 ug/1 for PCE.
6-2
-;,•· ... ......... ~. r,~
_::;f
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. I I 7.0 REFERENCES
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Conestoga-Rovers & Associates, July 1990. Remedial Investigation, Volume I and II, Jadco-Hughes Site, Gaston County, N.C. Reference No. 2427.
North Carolina Department of Environment, Health and Natural Resources (NCDEHNR),
July 1993. North Belmont PCE Site, NCD986 187123, North Belmont, Gaston County,
North Carolina. Superfund Section. Division of Solid Waste Management.
North Carolin.a Department of Environment, Health and Natural Resources, August 1990.
Administrative Code Section 15A NCA C 2B 0100 -Procedures for Assignment of Water
Quality Standards and Section 15A NCAC 2B 0200 -Classifications and Water Quality Standards Applicable to Surface Waters of North Carolina.
Roy F. Weston, Inc., February, 1997. Field Investigation Report, North Belmont Pee Site, Gaston County, Belmont, North Carolina. U.S. EPA Contract No. 68-W9-0057.
U.S. Environmental Protection Agency, June 1985. Guidance for Conducting Remedial Investigations and Feasibility Studies Under CERCLA, USEPN540/G-85/002.
U.S. Environmental Protection Agency, March 1987. Data Quality Objectives for Remedial
Response Activities, Volume I, Development Process, USEPA 540/G-87/003A.
U.S. Environmental Protection Agency, Region 4, October, 1990. Analytical Support
Branch Operations and Quality Control Manual, Science and Ecosystem Support Division.
U.S. Environmental Protection Adency, Region 4, May 1996. Environmental
Investigations Standard Operating Procedures and Quality Assurance Manual, Science
and Ecosystem Support Division.
U.S. Environmental Protection Agency, Region 4, September 1987. Field Health and Safety.
U.S. Environmental Protection Agency, Region 4, November, 1995. North Belmont PCE
Site, Project Operations Plan, North Belmont, Gaston County, North Carolina. Hazardous
Waste Section. Science and Ecosystem Support Division.
U.S. Environmental Protection Agency, Region 4, June 1996. North Belmont PCE
Site.Remedial Investigation/Feasibility Study Work Plan, North Belmont, Gaston County, North Carolina. Hazardous Waste Section. Science and Ecosystem Support Division.
U.S. Environmental Prote~on Agency, Region 4, Water Management Division, January,
1995. TSC195 Criteria Chart for 304(a) Criteria and Related Information for Toxic Pollutants.
North Belmont PCE Stte
Remedial Investigation
North Belmont, Gaston County, NC
ESO Project No. 96S-058/July, 1997 7-1
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APPENDIX A
·--· •·· ...... -.~ -~':_ _. .. ' ;-i,. .,
. '·· '-: . --:~ . ·. J'~~ · . . • .. ~.;~ ' _,,.. ... _, .. ' . ·. ~ .
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' . -.. ---··
Well Survey Database
' .
. :-:\( ;
. "<';•
I
I GROUNDWATER USE SURVEY RESULTS FOR THE NORTH BELMONT PCE SITE. ~ "
I 1ti..1 BodvShoo Woodbawn 15-10A 77.00 NO
oe Dan Barnes 2507 Boundar-, 15-10A 78.00 A.r-tjve NO No tserves 4 erov Barnes 2503 Boundarv 15-10A 78.01 see 78 NO rom lot 78 i:tud Barnes 505 Boundarv 15-10A 78,02 see 78 NO rom lot 78
I ·•-~~ Smith Noodlawn 1S-.10A 79.00 NO
13ennet Saucedo 2509 Boundarv 15-10A 80,00 see 78 NO ram lot 78 "!ennet Saucedo 2509 Boundarv 15-10A 81.00 fsee 78 NO rom lot 78 .
oncrete Sunnlv rYacant Lot 15-18 1.00 NO \Jllooded lot I -emetef'I Wooc11awn 15-18 1.01 NO Cemeterv
'.::oncrete Sunnlv 15-18 1.02 NO Wooded Lot ~rvt Smith IWoodla'M'I 15-18 2.01 ? NO
Mjlfiam J. Ro-r Sr. 601 Woodla'M'I 15-18 2.02 ''""ive 12) NO Wooded Lot I ,Villiam J. Ro""'r Sr. Woodla'M'I 15-18 3.00 Active NO Vacant lot lllilliam Ro-r IA1oodlawn 15-18 3.01 NO Jac;ant lot arold StnJ....,. Woodlawn 15-18 3.02 NO ✓acant lot '"'arold Walls ""'oodfavvn 15-18 3.03 NO I "arold Walls 05 Woodlawn 15-18 3.05 Active (21 NO/YES/ vemu StricMall
15-18 4.00? ~
arold Stru--1acant Lot Boundar 15-18 4.04 NO ;vacant Lot
I Ethel Walters 2519 Boundarv 15-18 4.05 Active NO No
Phvlis Perkins 517 Boundarv 15-18 4.06 ,~ .• NO
oe Dan Barnes 2515 Boundarv 15-18 4.07 ~ctive NO No
....,.lores Penlev 513 Boundarv 15-18 4.08 A.ctive NO No 1!1.ince 1985
I ~ .L. StolNe Mill 15-18 5.00 IARAND VES
Parkdale Mills Inc 15-18 6.00 YES Under con Park.dale Mills Inc 15-18 7.00 ES Under con p iVacant Lot Woodlaw 15-18 8.00 ""S I "'aston Presb. Church Need Lawn/Roner 15-18 9.00 'ES
barkdale Mills Inc 15-18 10.00 OPEN 12l YES POT .AVAIL NOT USEC 2Y
::iarkdale Mills Inc ?52 Woodlawn 15--18 10.00 'ES
::iarkdale Mills Inc 188 Woodlawn 15-18 10.00 'ES I ::iarkdale Mills Inc 254 Woodlawn 15-18 10.00 YES
::iarkdale Mills. Inc 8Julia 15-18 10.00 'ES
::iarkdale Mills Inc 2016 Acme 15-18 10.00 YES
::iarkdale Mills. Inc 2004 Acme 15-18 10.00 'ES I ::iarkdale Mills Inc 2008 Acme 15-18 10.00 YES
arkdale Mills. Inc 186 Woodlawn 15-18 10.00 YES
::iarkdale Mills Inc 6 Julia 15-18 10.00 YES
I ::iarkdale Mills Inc 5 Julia 15-18 10.00 ""'s
?arkdale Mills Inc 3101 Suoos 15-18 10.00 VES
Parkdale Mills Inc 3103 Sunns 15-18 10.00 ""'s
Parkdale Mills Inc 3100 Sunns 15-18 10.00 VES
I ;:larkdale Mills Inc 3106 SU""S 15-18 10.00 ""'s
Parkdale Mills Inc 46 Centerview 15--18 10.00 YES
Parkdale Mills Inc 47 Centerview 15-18 10.00 ""S
arlcdale Mills Inc 3108 Sunns 15-18 10.00 VES
I D;ukdale Mills Inc 48 Centerview 15-18 · 10.00 YES
barkd.ile Mills Inc 204 Centerview 15-18 10.00 =s
barkdale Mills Inc 49 Centerview 15-18 10.00 ""S
Parkdale Mills Inc 10 Centerview 15-18 10.00 ES I '.arlcdale Mills Inc 50 Centerview 15-18 10.00 'ES
barkdale Mills Inc 12 Centerview 15-18 10.00 'ES
barkd.ile Mills Inc 51 Centerview 15-18 10.00 YES
I tlarkdale Mills Inc 15 Centerview 15-18 10.00 YES
:,arkdale Mills Inc 52 Centervie-.v 15-18 10.00 'ES
Parkdale Mill~ 1.t1c __ ._ _ 17 C~~rview ______ 12,-18 _____ .,_ __ 10 ... 0;,Q -------··YES ________ ---------------------
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6 arkdale Mills Inc 145 Centerview 15-18 10.00 rrEs
I barkdale Mills Inc 3102 Su-..:'.s 15-18 10.00 YES
barkdale Milts Inc 20 Centerview 15--18 10.00 YES 6 .irkdale Mills Inc 3110 Su....,s 15-18 10.00 rfES
barkdalc Mills Inc 42 Centerview 1S..18 10.00 YES
I b.arkdale Mills. Inc 44 Centerview 15-18 10.00 YES
barkdale Mills Inc 19 Centerview 15-18 10.00 rrEs
b.irkdale Mills Inc .s 1 Centerview 15-18 10.00 YES
I
harkdale Mills Inc 43 Centerview 15-18 10.00 YES
barkdale Mills Inc 9 Centerview 15-18 10.00 YES
b.:,,rkdale Mills Inc 11 Centerview 15-18 10.00 YES
barkdale Mills Inc 13 Centervie<N 15-18 10.00 YES
I
6arkdale Mills Inc 16 Centerview 15-18 10.00 VES
barkda1e Mills Inc 18 Centerview 15-18 10.00 YES
15-18 11.00 he site
ono11ld Po ...... 126 Codv Lane 15-18 12.00 A.ctive NO No serves 4
I 15-18 16.03? ?
~arkdale Mills Inc Ross Ct. 1S.18 16.04 YES
C;;irkdale Mills Inc Ross Ct. 15-18 16.05 rrEs
Parkdale Mills 1nc Ross Ct. 15-18 16.06 'ES
I Parkdale Mills Inc Ross Ct. 15-18 16.07 YES
Parkdale Mills Jnc Ross Ct. 15-18 16.08 YES
oncrete Suoclv 15-18A 1.00
Stroune Harold 15-18A 2.00
I oner William 514 Woodla'M'I 15-18A 3.00
IA 15-18A 4.00
"oner William J. Sr. 510 Woodla'M'I 15-18A 5.00
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~OPER WILLIAM 503 WOODLAWN 15-18A 6.00
~ASTON COUNTY WOODLAWN 15-16A 7.00
~OPER. WILLIAM 508 WOODLAWN 15-18A 8.00
bOPER WILLIAM 508 WOODLAWN 15-18A 9,00
I "::ASTON COUNTY h11.1OODLAWN 15-16A 10.00
r:,ASTON COUNTY \R'OODLAWN 15-18A 11.00
"::ASTON COUNTY hNOODLAWN 15-18A 12.00
r:,ASTON COUNTY \R'OODLAWN 15-1SA 13.00
I CAYSEUR BETTY 201 SCHOOL ST 15-18A 14.00 A -"'ve NO no in use
EATHERMAN J.D. 203 SCHOOL ST 15-18A 15.00 IABAND YES ••-s cemented
ASTON COUNTY 15-18A 17.00 ?
tALE JOHN 211 SCHOOL ST 15-1BA 18.00?
I OLDMAN PAUL 213 SCHOOL ST 15-18A 19.ooi? ,
~111oodlavvn 15-18A 20.00 YES , Woodlavvn 15-18A 21.00 'ES
IVfLLER.GORDON 412 WOODLAWN 15-18A 22.00 YES
I 15-16A 22.01 'ES
15-18A 23.00 YES
Vacant lot 15-18A 24.00 rrEs .,..,cant lot
I ill/Dott Simmons 124 Rooer 15-18A 24.01 YES
hon Bumnardner 122 Roner 15-18A 25.00 rrEs
"onnie Wentz: 120 Rooer 15-18A 26.00 VES
~eneva Hanens 118 Roner 15-18A 27.00 rrEs
I 116 RODf'!f 15-18A 28.00 Active NO
F::teve White 114 Ro,_r 15-18A 29.00 IActive NO
ohn L. Smith 112 Roner 15-18A 30.00 Active NO L--IJ 4 •-
.D. Leatherman 110 Ro"""r 1S-.18A 31.00 NO
I .D. Leatherman 110ARoD1!:r 15-18A 31.00 NO
.D. Leatherman 108 Roner 15-18A 31.00 NO
.D~Leatherman ___ • J0BARopeJ _______ J~18f-____ --~1.,_0Q --------No _________ ---------------------
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·, li.D. Leatherm.in 106 Ro--r 1S..18A 31.00 NO
I .D. Leatherman 104 Ro-r 15-18A 31.00 NO
br.idshaw Groceries \? Acme 1S-18A 32.00 7 NO
113 Ro-r 15-18A 32.01
~••-1e Simmons 111 Ro--r 15-18A 33.00 NO
I ~ 7 Acme 15-18A 34,00? NO
"'letcher Conner ?Acme 15-18A 35.00 Active NO numn fill 63ft
? Acme 15-1SA 36,00 Active NO .
I '"'ontinenbl Cabinet ?Acme 15-18A 37.00 see 39 NO
ontinenbl Cabinet ?Acme 15-18A 38.00 see 39 NO
r':ontinental C.ibinet 2115Acme 1S.18A 39.00 !Active NO
?Acme 15-18A 39.01 NO Radio Tower
I nnela Smith 2203 Acme 15-18A 40.00 Active NO
r"harolette W. Lee "201 Acme 15-18A 41.00 Active NO ~a-II 21 ,..,..
ohn Griffith 2209 Acme 15-18A 42.00 Active NO •·-II 35 ·-
A'av Oliver 2205 Acme 15-18A 43.00 !Active NO L-.-11 16 vrs
I .0. Leatherman 1•-me 15-1BA 44,00 ctive NO
.P. L·-an 2219 Acme Rd. 15-18A 45.00 lsee 44 NO rom44
. D. Leatherman 2223 Acme Rd. 15-18A 46.00 kec44 NO hom44
1S-18A 47.00 YES
I ··ooowARo RANDY a3ACME 1S-18A -48.00 MWELL ..,.ES-1991 NO
i.. D. Leatherman 2215 Acme Rd. 1S-18A 49.00 IARAND "ES-1991 YES L--[I 25 vrs
---'AMBRICK, ERENIA 1 OS SCHOOL ST 15-18A 50.00 l.o.RAND YES-1991 YES cemented
1..ORNELL LESTER 107 SCHOOL ST 15-18A 51.00 ABAND YES-1991 YES cemented
I 15-18A 52.00 ? ?
••OORE JUDY 109 SCHOOL ST 15-18A 53.00 UWELL YES-1991 NO
-REWS RUBY 111 SCHOOL ST 15-18A 54.00 11.BAND YES-1991 YES cemented
I ~ "'DREWS LUDDlE 107 ROPER ST 15-18A 55.00 .,.ES-1991
~•ORGAN STEWART 105 ROPER ST 15-18A 56.00 ·es
EATHERMAN. J. 0. 103 ROPER ST 15-18A 57.00
bROOME HESSlE 101 ROPER ST 15-18A 58.00 Active NO in use
I "HURCH ANNEX 106 SCHOOL ST 1S-18A 59.00 see 60
1:::-ULL GOSPEL CHURCH 116 SCHOOL ST 15-18A 60.00 Active NO
"HURCH ANNEX 15-18A 61.00 see 60
1:::-UJIKO DAVID 114 SCHOOL ST 15-18A 62.00 Active NO in use
I ... LANTON DAVID 114 SCHOOL 15-18A 62.00? ? ? ?
EATHERMAN J.D. 112 SCHOOL ST 15-18A 63.00 IABAND YES YES cemented
6 USSELL BRENDA 110 SCHOOL ST 15-18A 64.00 MWELL YES-1991 no
L..ONNER FLETCHER 104 APRICOT 15-18A 65.00 lActive NO NO in use
I L-ANIPE ROMAJEM 106APRICOT 15-18A 66.00 Active NO NO in use
~EETER D. 116 MAGNOLIA ST 15-18A 67.00 ABAND YES-1991 YES cemented
hEESE J.C. 114 MAGNOLIA ST 1S-18A 68.00 BAND VES-1991 ' -, cemented
~RIFFIN RENTAL 110APRICOT 15-18A 70.00 MWELL YES-1991 '·-s cemented
I hECKER MARY 109 APRICOT 15-18A 71.00 ••WELL YES-1991
15-18A 72.00 ? ?
LiuGHES ELENE 109GOSHEN 15-18A 74.00 MW YES-1991 NO
I necKER MARY 111 APRICOT 15-leA 75.00 MWELL YES-1991 NO
AARRETT MARY 107 APRICOT 15-18A 76.00 BAND YES ·s cement
""'OFFMAN 107 APRICOT 15-18A 76.01 11.BAND YES-1991 YES cemented
lLER MABLE 105APRICOT 15-18A 77.00 l.o.RANO YES-1991 NO cemented
I l"'ALLACE BOB 103APRICOT 15-18A 78.00 YES NO
<:HERRILL J.C. 101 APRICOT ST 15-18A 79.00 lABAND lvES-1991 '·-s cemented
i--,aston Count.. h11.1OODLAWN AVE. 15-18A 80.00 MWell YES-1991 NO
15-18A 81.00? ?
I 15-18A 82.00 ? ?
~'"HFAFFY.O. 197 GOSHEN 15-18A 84.00 MWell YES-1991 NO
bARKER.fRANKLIN __ 199GOSJjEN ______ 12"181', ____ _ -~S ... O.Q bf3AND ____ YES ________ lYes _______ cemented ________
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-LARK CARL TON 201 GOSHEN ST. 1S-18A 87.00 1" .. AND YES-1991 '·-, 1,.emented I i1QRDAN REBECCA 203GOSHEN 15-16A 87,01 ... AND YES-1991 ,,_,
'"'AGLE BERTHA 205GOSHEN 15-16A 87.02 1M WELL YES-1991 oo
USASSAN RUTH 204 GOSHEN 1S-18A 88.00 fr..iiweLL YES-1991 00
I
l,USASSAN RUTH 204 GOSHEN 15-18A 88.01 4 BANO YES '·-· cemented
l'AGANS 15-16A 89.00
'ANOYKE 15-1eA 90.00? ? 7
l1AN DYKE HELEN 115 MAGNOLIA ST 15-18A 91.00 ABAND YES-1991 YES CEMENTED
I -ALLOWAY JULIE t 17 MAGNOLIA ST 15--18A 92.00 "0 AND YES-1991 YES CEMENTED
1S..18A 93.00 7 ?
'""RIFFIN BOB 121 MAGNOLIA ST 1S-18A 94,00 IMWELL YES-1991 NO
i...ESSER ALLIE M. 123 MAGNOLIA ST 15-16A 95.00 •-AND YES-1991 VES CEMENTED
I hRESTLEY HOUSTON 91 ACME 15-18A 96.00 ABAND IYES-1991 Ives CEMENTED
-oLLETTE JAMES iAsACME 15-16A 96.01 ,.___.,Ve NO ND in use
hOLLETTE J 89ACME RD 15-16A 96.02 ctive 00 00 in use
'AN DYKE J.A. 108 SCHOOL ST 15-18A 96.00 ""AND YES-1991 '·-, cemented
I husSEL B 110 SCHOOL ST 15-18A 96.01 ? ?
15-18A 98.02? ?
104 SCHOOL ST 15-18A 99.00 · -"ve 00 00 in U!.e
-HERRILL BOBBY 102 SCHOOL ST 15-18A 100.00 IIDAND VES-1991 YES
I 15-18A 101.00? I?
.... ADDIS MILES 87 ACME 15-16A 102.00 ••WELL YES-1991 NO
~ATOR MICHAEL A 85ACME 15-16A 103.00 BAND tvES-1191 ·-s -remented
15-18A 104.00 ? I 15-18A 105,00 17
.-.ENTERVIEW BAPT. 88ACME 15-18A 106.00 ?
ENTERVIEW BAPT. ACME 15-18A 107.00 ?
I obbu Grindstaff 105 Odaniel 15-18A 108,00 6ctive NO L--1130 ·-
15-18A 108.01 ? ?
obbu Grindstaff 107 Odaniel 15-18A 109.02 IActive NO L--1130•-
15-18A 109.04 ? ? '
I homas ca, le 115 Odaniel 15-18A 110.00 IActive NO NO 25+YRS
Rrn.,Mu'"h" 110 Odaniel 15-18A 112.00 NO
..,era Cunninnham 112 Odaniel 15-18A 112.00 NO
1L-ela McCam 114 Odaniel 15-18A 112.00 NO
I rian McMaster Dumont Avenue 15-18A 112.00 NO
L..azel S"ar"O 119 Cod" Lane 15-16A 112.01 "--"'ve ND NO L•-[129 •-
ames Underwood 123 Thomas Fite Rd 15-18A 112.02 Active NO NO L•-11 22 vtS
arr" Broome Dumont Ave 15-18A 112.03 Active NO NO
I o!:Jbv Grindstaff Dumont Ave 15-18A 112.04 Lo:.ee 108 NO
~'ell Odaniel 106 Odaniel Rd. 15-18A 113.00 IActive NO NO 45+ YRS
oan Short 106.5 Odaniel Rd. 15-18A 113.00 NO
I ••arlowe Joann 102 Odaniel 15-18A 114.00 IActive NO ND \"'ELL 32 YRS
15-18A 115.00?
mis Inc. 2232 Acme 15-16A 116.00 IActive NO L•-1113 ,_
ar~Broome End of Dumont 15-18A 117.03 l.11.ctive NO
I 1·nknovvn? 2228 Acme Rd. 15-18A 118.00 !Active NO
hadnett. Lucille 2224 Acme Rd. 15-18A 119.00 l.6.ctive NO •·-II 15 ·-
-onner 2220 Acme Rd. 15-16A 120.00 IActive NO 1,.,._11 7 ._
Lianne Cobb 2216 Acme Rd. 15-16A 121.00 ctive NO 1·-118·-
I uaxRi!ev 2212 Acme Rd. 15-18A 122.00 ctive NO 1,.,.-n 30+ vr
ha., Oliver 2208 Acme Rd. 15-18A 123.00 ctive 131 NO 31 WELLS
h 2204 Acme Rd. 15-18A 124.00 ~ ~ES ?
lierome K;;i,le 201 Centeiview 15-18A 125.00 ctive NO NO O+·-
I ~•~rtha M;;i,lcolm 203 Centerview 15-18A 126.00 kee 127 NO
barest Mor"an 205 Centerview 15-18A 127.00 ,.....,ve NO ND ho+·-
ME!_ry Eren£C~.9!i.v~r-____ 2Q.2_C_ent~ryj~-_____ iJ~!8P, ____ .1. _ jf..8-'-0.Q A£ti.!«t. _____ N.9 _________ ---------------------
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oel Smith boo Centerview 15-18A 129.00 A...:ve NO NO
I 6arkdale Mills Inc 04 Centerview 15-18A 130.00 7 NO IMUST GO ir:rrvwAT>
~ichard Han-is 1 OS Thomas Fite Rd 1S-18A 131.00 Adive NO NO l. -II 20
::lobert Baird 107 Thom;is Fite Rd 15-18A 132.00 "--i>,ie NO NO ~--111 ·-
h..vid Gillelan 109 Thomas Fite Rd 15-18A 133.00 ,__.,Ve NO NO 200 ft dee--
I 113 Thomas Fite Rd 15-18A 134.00 7 NO
115 Thomas Fite Rd 15-18A 135,00 7 NO
1S-16A 136.00 7 NO
117Thomas Fite Rd 15-18A 137.00 7 NO I havid/Brenda Sutton 121 Thomas Fite Rd 15-18A 138,00 , ...... ,ve NO NO L-ne--
Co-124 Codv Lane 15-18A 139.00 keememo NO
Ll.arold Richards 128 Codv Lane 15-18A 139.01 ctive NO NO
I
onnie B. Hartness 122 Thomas Fite Rd 15-16A 139,02 Active~ NO NO don't drink
Llerms 130 Codv Lane 15-18A 140.00 lc:ee 142 NO
b 120Thoma Fite Rd 15-18A 141.00 ee 142 NO
lA-.n•Waters 118 Thomas Fite Rd 1S-18A 142.00 "-->ive NO serves 4
I 1 16 Thom.as Fite Rd 1S-18A 143.00? NO
132 CodvLane 15-18A 144.00 ·-142 NO
Llack Winchester 114 Thomas Fite Rd 1S-18A 145.00 ·-•,., NO NO l--11 25 ·-
112 Thomas Fite Rd 15-18A 146.00 NO
I b 110Thomas Fite Rd 15-18A 147.00 NO
lwoodla'Nii 15-18C 1.00 =s
'"1oodlawn 15-18C 2.00 YES
Woodlawn 15-18C 3.00 YES
I "-111oodlawn 15-18C 4.00 YES
Woodlawn 15-18C 5.00 YES
kA1oocfla'M1 15-18C 6.00 A.BAND YES YES CEMENTED
'"'oodlawn 15-18C 7.00 ES
I M 100dlawn 15-18C 8.00 YES
Boundarv 15-18C 9.00 ES
Boundarv 15-18C 10.00 "ES
I
Boundarv 15-18C 11.00 YES
Boundarv 15-18C 12.00 "ES
Boundarv 15-18C 13.00 WES
Boundarv 15-18C 14.00 "ES
I Boundarv 15-18C 15.00 YES
Boundarv 15-18C 16.00 YES
Boundarv 15-18C 17.00 ES
Jacks.on 15-18C 18.00 YES
I =ieninald Foster 2316 Jackson 15-18C 19.00 '"AND 'ES YES concreted
Jackson 15-18C 20.00 YES
Llackson 15-18C 21.00 =s
-'ackson 1S-18C 22.00 YES
I Llackson 15-18C 23.00 YES
Jackson 15-18C 24.00 YES
Jackson 15-18C 25.00 YES
I Jackson 1S-18C 26.00 YES
Jackson 1S-18C 27.00 BAND "ES "ES CEMENTED
Jackson 1S-18C 28.00 YES
Jackson 15-18C 29.00 YES
I Jackson 15-18C 30.00 YES
Jackson 15-18C 31.00 "ES
Jacks.on 15-18C 32.00 l.,.AANO YES YES
Jackson 15-18C 33.00 WES
'I Jackson 15-18C 34.00 "ES
Liackson 15-18C 35.00 IYEs
--------------Jdacks.9n _________ 1~18~----__ is ... O;Q --------ty,;s ·-------L.--------------------
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1ackson 15-18C 37.00 YES
I Jackson 15-18C 3'1.00 YES
lJackson 15-18C 39,00 YES
Belmont 15-16C 40.00 YES
Belmont 15-16C 41.00 'ES
I Belmont 15-18C 42.00 'ES
Belmont 15-18C 43.00 YES
Belmont 15-18C 44.00 YES
Belmont 15-18C 45.00 YES
I Belmont 15-18C 46,00 'ES
Belmont 15-18C 47.00 'ES
Belmont 15-1BC 48.00 YES
I Belmont 15-18C 49.00 'ES
Belmont 15-18C 50.00 YES
Belmont 15-18C 51.00 'ES
Belmont 1S..18C 52.00 "-S
I Belmont 15-18C 53.00 YES
Belmont 15-16C 54.00 YES
Belmont 15-18C 55.00 IYES
Belmont 15-18C 56,00 YES
I Belmont 15-18C 57.00 IYES
Belmont 15-HIC 50.00 YES
Belmont 15-18C 59.00 V'FS
Belmont 15-18C 60.00 YES
I '415 Jackson 15-18C 61,00 'ES
1'2413 Jackson 15-18C 62.00 YES
l_.._, Beaslev '400 Jackson 1S.18C 63.00 '"'ND 'ES YES not consume
!Jackson 15-18C 64,00 YES
I Jackson 15-18C 65.00 'ES
Jackson 15-18C 66,00 'ES
Jackson 15-18C 67.00 YES
I Jackson 15-18C 68,00 'ES
2410 Jackson 1S.18C 69.00 YES
2412 Jackson 15-18C 70.00 'ES
2414 Jackson 15-18C 71.00 YES
I 416 Jackson 15-18C 72.00 'ES
418 Jackson 15·18C 73.00 YES
:ackson 1S.18C 74.00 VES
:ack:son 1S.18C 75.00 YES
I Bound:arv 15--18C 76.00 YES
Bound:arv 1S.18C 77.00 'ES
Bound:arv 15-18C 78.00 =s
Bound:arv 1S.18C 79.00 'ES
I Bound:arv 15--18C 80.00 'ES
Bound:arv 15--18C 81,00 'ES
Boundarv 15-18C 82.00 YES
Boundarv 1S.18C 83.00 'ES I Boundarv 15-18C 84.00 'ES
Boundarv 15•18C 85.00 'ES
Boundarv 1S..18C 8-6.00 'ES
I Boundarv 15-18C 87.00 YES
Boundarv 1S..18C 88,00 YES
Parkdale Mills Inc 1616 Perfection 15-9 0.00 VES
Parkdale Mills Inc 1632 Perfection 15-9 0.00 'ES
I Parkdale Mills Inc 1609 Perfection 15-9 0.00 VES
P:arkdale Mills lnc 1608 Perfection 15-9 0,00 YES
~:arkdale Mill~ Inc _ _ _ _ 1€~ P,;t~ction _____ 1a,,i_ ____ _ __ o_o.Q --------D'~S -----------------------------
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Parkdale Mills Inc 1624 Perfection 15-9 0.00 "ES
I b.irkdale Mills Inc 1617 Perfection 15-9 0.00 CfES
Parkdale Mills Inc 1740 Perfection 15-9 0.00 YES
6ark1fale Mills Inc 1732 Perfection 15-9 0.00 YES
b:;ukdale Mills Inc 1708 Perfection 15-9 0.00 YES
I Clarkdale Milts Inc 1731 Perfection 15-9 0.00 YES
Parkdale Mills Inc 1739 Perfection 15-9 0.00 YES
Parkdale Mitls Inc 1724 Perfection 15-9 0.00 YES
:iarkdale Mills Inc 1723 Perfection 15-9 0.00 YES
I :i:ancdale Mills Inc 1716 Perfection 15-9 0.00 YES
:iarlafale Mills Inc 1715 Perfection 15-9 0.00 'ES
=>:ukdale Mills Inc 1640 Perfection 15-9 0.00 YES
:iarkcfa1le Mills Inc 1633 Perfection 15-9 0.00 'ES
I =-arkdale Mills Inc 1755 Perfection 15-9 0.00 YES
:>arkdale Mills Inc 1746 Perfection 15-9 0.00 'ES
:iarkdale Mills Inc 1747 Perfection 15-9 0.00 'ES
I :>arkdale Mills. Inc 1754 Perfection 15-9 0.00 =s
1861 Perfection Av 15-9 15.00., NO
1845 Perfection Av 15-9 16.00 ? NO
:,arkda1e Mill Inc. 15-9 17.00 ,es
I )arkdale Mill Inc. Miller Street 15-9 18.00 <ES
,...hurch of God 15-9 21.00 'ES?
)arkdale Mill. Inc. 15-9 22.00 ?
'arkdale Mill Inc. 15-9 23.00 ~CTIVE ? NOT USED VACANT LOT
I .R. Wood" 1800 Perfection 15-9A 1.00 YES
~nrinole 1003 Wilkerson 15-9A 2.00 YES
'"""S 1005 Wilkerson 15-9A 3.00 YES
ilev 1007 Wilkerson 15-9A 4.00 CfES
I hunlao 1009 Wilkerson 15-9A 5.00 YES
1011 Wilkerson 15-9A 6.00 YES
1013 Wilkerson 15-9A 7.00 IYES
1015 Wilkerson 15-9A 8.00 YES
I 1012 Wilkerson 15-9A 9.00 YES
1010 Wilkerson 15-9A 10.00 YES
1008 Wilkerson 1S-9A 11.00 YES
I 1006 Wilkerson 15-9A 12.00 YES
owe 1004 Wilkerson 15-9A 13.00 YES
1\/ise 1002 Wilkerson 15-9A 14.00 YES
1754 Perfection 15-9A 15.00 YES
I iQmons 3111 Carson St. 15-9A 16.00 YES
3107 Carson St. 15-9A 17.00 '!ES
3103 Carson St. 15-9A 18.00 =s
3101 Carson St. 15-9A 19.00 YES
I 2015 Rhvne St. 15-9A 20.00 CfES
2011 Rhvne St. 15-9A 21.00 M'S
12003 Rhvne St. 15-9A 22.00 YES
2006 Rhvne St. 15-9A 23.00 YES
I 2010 Rhvne St. 15-9A 24.00 YES
2014 Rh""e St. 15-9A 25.00 rFS
3015 Carson St. 15-9A 26.00 YES
I 3011 Carson St. 15-9A 27.00 YES
3007 Carson St. 15-9A 28.00 YES
006 Carson St. 15-9A 29.00 'ES
3010 Carson St. 15-9A 30.00 YES
I ndsor 3014 Carson St. 15-9A 31.00 =s
2108 Rh11ne St. 15-9A 32.00 YES
-------------2114 RID:!]~St. _____ W?:~A _____ • __ i3.,_0Q ________ YES ________ ----------------------
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21HIRh·-eSt. 15-9A 34.00 h'ES
I 2119 Rhvnc St. 15°9A 35.00 'ES
2113 Rhvne St. 1S-9A 36.00 YES
2109 Rhvne St. 15°9A 37.00 YES
2105 Rhvne St. 15-9A 38.00 YES
I 2101 Rhvne St. 15-SA 39.00 YES
3106 Carson St. 15-SA 40.00 YES
~ik.ird 3110 Carson St. 1S-9A 41.00 YES
2027 Arc Or. 15-9A 42.00 YES
I 2025 Arc Or. 15-9A 43.00 YES
2023 Arc Dr. 15-SA 44.00 YES
? 15-SA 45.00 YES
1201 Pebble Creek 15-9A 46.00 YES
I 1203 Pebble Creek 15-SA 47.00 YES
,oaks 1205 Pebble Creek 15-9A 48.00 YES
New House Wilkerso 15-SA 49.00 YES
I New House Wilkerso 15-SA 50.00 ES
New House Wilkerso 15-9A 51.00 'ES
clacant Lot Wilkers 15-SA 52.00 YES
Vacant Lot Wilkers 15-SA 53.00 'ES
I .Jacant Lot Wilkers 15-SA 54.00 YES
1020 Wilkerson 15-SA 55.00 YES
1018 Wilkerson 15-9A 56.00 YES
Vacant Lot Wilkers 15-9A 57.00 =s
I \/acant Lot Wilkers 15-9A 58.00 YES
1019 Wilkerson 15-9A 59.00 YES
ilacant Lot Wilkers 15-SA 60.00 YES
1\/acant Lot Wilkers 15-SA 61.00 YES
I llacant Lot Wilkers 15-9A 62.00 'ES
1/acant Lot Wilkers 15-9A 63.00 YES
Vacant Lot Wilkers 15•9A 64.00 YES
Vacant Lot Wilkers 15-9A 65.00 YES
I New House Wilkerso 15-9A 66.00 h'ES
1Aichael Clutts 1035 Wilkerson 15-9A 67.00 YES
ones 1037 Wilkerson 15-9A 68.00 YES
I uni 1301 Pebble Creek 15-9A 69.00 ves
1303 Pebble Creek 15-9A 70.00 YES --·---., -·· 7' •• . ...
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Geologicai
Survev ,
\/\later-Supply
Paper 27?0
Pre;Jared in
cooperation with the
North Caroiina
Department o;· :''\!atu:-al
Resources a:1ci
Community Develo~rnent
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~:pQROSITY
t . oi openings (voids) to the total volume of a soil or SELECTED VALUES OF POROSITY
Jtw, rJt10 . p · · d · h . • red to as its poros,ty. · oros11y 1s expresse e1t er ·L ,s re1er h ,o.. • I irJction or as a percentage. T us, s:, J deC1ma
n-
n is porosity as a decimal fraction, V1 is the total
"t,c:re oi a soil or rock sample, V5 is the volume of solids in
,oh.in,!ple, and Vv is the volume of openings (voids).
the. S.l multiply the porosity determined with the equation by 1rwe . CO the result is porosity expressed as a percentage. 1 5(j15 are among the most porous of natural materials
t,ecause soil particles tend to form loose clumps and because
. he presence of root holes and animal burrows. Porosity of ort d · d d h · · · r,eonS.Olidated epos1ts epen s on t e range m gram size
~,ort;ngJ and on the shape of the rock part;cles but not on their
. e. Fine•grained matenals tend to be better sorted and, thus, "' .. tend 10 have the largest poros1t1es.
Vv = 0. 3 m 3
Vi=I.Om3
+
,,.•o•0o 0 o!•"';,o ooo 0 P•• o 0 O O 0 0000000000 o 0 °0 000000000 0° o
00 0 o o 0000 o 0 o 0 o
oo Ory oo 0°0 °0
00° ooo O 0 • oo sand oo oo':oo
0 0 0 0 0 0 0 0 O O o • • 0• o
OOOOOOOOO 0 ":,_0
00000000000
00000000
[Value!> in percent by volumej
Material
Equal-size spheres (marbles):
loosest packing--------------
TightP.st packing -----
Soil ----------
Clay
Sand----------
Gravel--------------
limestone --------
Sands1one (semiconsolidated) ----
Granite ---------
Basalt (young) -------
Volume of voids ( Vv) 0.3 m3
Porosity (n) = =----
Tota I volume ( Vrl 1.0 m3
Primary openings
48
26
55
50
25
20
10
10
10
f-
= 0. 30
Im
Secondary openings
10
1
.1
Im
I T m
Porosity 7
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specific yield tells how much water is available for man's
se and specific retention tells how much water remains in
~h/rock after it is drained by gravity. Thus,
V, s,-v,
where n is porosity, Sy is specific yield, 5, is specific retention,
vd is the volume of water than drains from a total volume of
" v is the volume of water retained in a total volume of V:1, vi, r
and Vr is total volume of a soil or rock sample.
SELECTED VALUES OF POROSITY, SPECIFIC YIELD,
AND SPECIFIC RITENTION
[Values in percent by volume)
Material Porosity Specific yield Specific retention
Soil 55 40 15
Clay so 2 48
Sand 25 22 3
Gravel 20 19
Limestone 20 18 2
Sandstone (semiconsolidated) 11 6 5
Granite .1 .09 .01
Basalt (young) 11 8 3
Specific Yield and Specific Retention 9
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DATE:
TO:
THRU:
FROM:
SUBJECT:
October 21, 1991
REF.12
ROY F. WESTON, INC.
GSA RARITAN DEPOT
2890 WOODBRIDGE AVENUE
• BLDG. 209 ANNEX
EDISON, NJ 08837-3679.
908-632-9203
Greg Powell, U.S. EPA Work Assignment Manager
Gary Buchanan, REAC Section Chief 6b
Mark Ellis, REAC Task Leader @
DOCUMENT TRANSMITTAL UNDER WORK ASSIGNMENT 3-494
Allached please find the following document(s) prepared under this work assignment:
FINAL REPORT
WELL INSTALLATION, SAMPLING AND
PRELIMINARY HYDROGEOLOG!CAL INVESTIGATION
NORTH BELMONT ROAD SITE
NORTH BELMONT, NORTH CAROLINA
cc: ·Central File WA 3-494 (w/attachment)
W. Scott Butterfield (w/o auachment)
B. Cibuiskis (w/o attachment)
ldm:me/ELLIS/FR-4494
.,
. -. --... -,--
WELL INSTALLATION, SAMPLING AND
PRELIMINARY HYDROGEOLOGICAL INVESTIGATION
Prepared by:
Roy F. Weston, Inc.
Mat Ellis .
Tasli Leader
NORTH BELMONT ROAD SITE
NORTH BELMONT, NORTH CAROLINA
October, 1991
EPA Work Assignment No.: 3-494
Weston Work Order No.: 3347-31-01-4494
EPA Contract No.: 68-03-3482
FJ.NAL REPORT
Prepared for:
U.S. EPNERT
Greg Powell
Work Assignment Manager
/'". ;,/,_·, ~r-::1,. /;,·
W. Scott Butterfield -· / · {Date)
Project Manager 1
ldm:me/ELLIS/FR-4494
,,,,
TABLE OF CONTENTS
LIST OF TABLES
LIST OF FIGURES
1.0 INTRODUCTION
1.1 Site Background
1.2 Objectives of this Study
1.3 Geology Background
1.3.1 Hydrology
1.3.2 Hydrogeology
2.0 METHODOLOGY
2.J Monit0r Well Installation
2.1.l Bedrock Well
2.1.2 Overburden Wells
2.2 Geophysical Well Logging
2.2.1 Brief Theory of Operation
2.2.2 Aaiuisition of Field Data
2.3 Field Analytical Screening
3.0 RESULTS
3.1 Soil Headspace Results
3.2 Water Headspace Results
3.2.1 Field Screening
3.2.2 GC/MS Results
3.2.3 PCE/TCE Groundwater Plume
3.3 Geophysical Logging Results
3.3.1 NW· SE Cross ~ion
4.0 DISCUSSION OF RESULTS
5.0 CONCLUSIONS
6.0 RECOMMENDATIONS
REFERENCES
APPENDIX
Memorandum: Nonh Belmont PCE GC Repon
ldm:me/ELLIS/FR-4494
Water Table Data
Soil Heaclspace Results
Water Heaclspace Results
LIST OF TABLES
TABLE 1
TABLE2
TABLE3
TABLE4 GC/MS Results of Aqueous voe Analysis
ldm:me/ELLIS/FR-4494
u
LIST OF FIGURES
FIGURE 1 Site Location Map
FIGURE 2 Site Map With Water Table Contours
FIGURE 3 Approximate PCE/TCE Groundwater Plume
FIGURE 4 NW-SE Cross Section
FIGURE 5 Geophysical Logs for the Shopping Center Well
FIGURE 6 Geophysical Logs, Well Construction and Lithologic Description for MW-2
FIGURE 7 Geophysical Log and Lithologic Description for MW-1
FIGURE 8 Geophysical Log for the Mahaffey Well B
FIGURE 9 Geophysical Log for the School Well
FIGURE 10 Geophysical Logs, Well Construction and Lithologic Description for MW-5
ldm:me/ELLIS/FR-4494
1.
1.0 INTRODUCTION
1.1 Site Background
Toe North Belmont Road Site is located in North Belmont, Gaston County, NC. North
Belmont is situated approximately six miles west of the Charlotte, NC city limit and midway
between Charlotte and the town of Gastonia (Figure 1).
The town of North Belmont is an old mill town with a present population of approximately
970. It is a residential area with small strip mall-type businesses sporadically located around
town. Nearly half the population receives their drinking water from a city-supplied source.
The remainder of the population relies on privately-0wned wells for their water needs.
Toe site hisiory is somewhat sketchy, but according to the United States Environmental
Protection Agency (U.S. EPA), Region JV On-Scene Coordinator (OSC), Don Rigger, a dry
cleaning operation existed some 15 years ago, located at what is now the Roper's Shopping
Center. It is suspected that the operation openly disposed spent solvent solutions onto the
ground surface behind the establishment As a result, groundwater in the area has become
contaminated. The source area for the groundwater plume of contamination is believed to
be just north of (and adjacent to) the North Belmont Elementary School on Woodlawn
Avenue. Nearby residential wells have been found to contain detectable levels of
characteristic dry cleaning· compounds: tetrachloroethylene (PCE), trichloroethylene
(fCE) and cis-1,2 dichloroethylene (DCE).
At least two previous rounds of resid.ential well sampling have been performed by Region JV
U.S. EPA In February 1991, twenty-One residences were sampled. Analytical results
indicated the presence of these compounds (PCE, TCE, DCE), with concentrations ranging
from non-detected (ND) to 15,000 parts-per-billion (ppb) in the aquifer. In March 1991, an
additional five samples were collected from different addresses than previously sampled. One
sample contained less than 1 ppb PCE.
1.2 Objectives of this Study
The objectives of this study were for the U.S. EPA, Environmental Response Team/Response
Engineering and Analytical Contract (ERT/REAC) to install five monitor wells and anempt
to characterize the following: the overburden sediments and bedrock lithology and fracturing,
the approximate extent of the contaminant plume, and the primary flow ~irection for the
local groundwater/contamination. Figure 2 (Site Map) contains the locations of these
monitor wells.
1.3 Geology Background
The North Belmont site is situated on the southwestern to northeastern trending Charlone
Lithotectonic Belt of the Piedmont This belt is composed of plutonic, metavolcanic, and
metasedimentary rocks. Bedrock in the vicinity of this site is metamorphosed quartz diorite
and tonalite. The structure in the area includes both eastward and westward, steeply dipping
to vertical bedding and/or foliation striking southwest-northeast. Regional geologic
information is from Goldsmith et al. (1988).
ldm:me/ELLIS/FR-4494
L
Overbmden thickness at the Nonh Belmont site varies from 70 feet (ft) in the nonhwest
(Shopping Center Well), to 110 ft (MW-5). toward the southeast The overburden is
composed of clays and silts changing to saprolite at varying depths (Figure 4). Bedrock
samples from each of the monitoring wells drilled were field identified as diorite. It is not I.
cenain if the rock: was marginally metamorphosed.
1.3.1 Hydrology
The site is situated on a topographic high exhibiting approximately 70 to 90 ft of
relief compared to adjact:nt surfare streams. There are two surfare streams in the
immediate area which have a potential impact on the direction of groundwater flow.
One Stream is located approximately 1500 ft nonheast of the site. The other stream
is located approximately 1500 to 2000 ft southwest of the site (Mount Holly
Topographic Quadrangle).
A groundwater high exists in the vicinity of the old Food Lion store and Roper's
Shopping Center. From the suspected source of contamination, all water table
contouri slope away from the groundwater high toward the nonheastern stream.
Due to the direction of flow, as indicated by the water table map (Figure 3), the
surfare stream to the nonheast of the site appears to be the major control for the
direction of groundwater flow away from the site. The relationship between the
stream and the groundwater, as illustrated by the water tabl_e contours, indicates an
apparent effluent or groundwater recharged stream. This water table contour map
was generated from limited field data (Table 1) and reasonable assumptions were
made based on local topography.
Contamination of the groundwater was first identified in the water being pumped
from the School Well. At the time this contamination was detected, and for some
time prior to the detection of the contamination, this well was producing
approximately 5,000 gallons of water per day (Doc Thompson, personal
communication, 1991). Water from this well was being used to supply not only the
school, but also two pri,'3le homes.
The pumping of the School Well would have had an influence on the direction of
groundo.'3ter flow in the immediate area including the flow of groundwater from the
site of contamination. The enraction of the groundwater from the School Well
would have produced a cone of depression around the well, drawing water towards
that well. In this case, the flow of groundo.'3ter and contaminants would have been
controlled by the influence of pumping as well as the influenre of the natural
groundv.'3ter gradient
1.3.2 Hydrogeology
ldm:me/ELLIS/FR-4494
It is suspected that the characteristics of groundwater flow in the saprolite are
influenced by relict features. Features that were present in the saprolite's parent
material (Le., bedding planes, foliation, or fractures) are, to a degree, preserved in
the saprolite. These features act to control or enhance the direction and rate of
groundv.'3ter flow.
Features found in the saprolite can be expected to be more prevalent in the parent
material, where they also play the dominant role in the direction and rate of
groundwater movement Therefore, one may assume that there are at least two
rones of groundwater which may or may not be interconnected. These two zones t
include an upper unconfined wne at water table conditions, composed of the
overburden and saprolite, and a lower rone within the competent bedrock. A
delineation of this hydrogcologic framework is one goal of the present study.
2.0 MEIBODOLOGY
2.1 Monitor Well Installation
One bedrock and four overburden monitor wells were installed by McCall Brothers Drilling
Co. of Charlotte, NC, under the direction of the OSC and ERT/REAC.
Toe decisions for well locations and final depths were based on: previous residential well
sampling, the suspected location of the source area, and the suspected flow direction of the
water table aquifer. Toe original plan to install three bedrock wells was altered (i.e., one
bedrock well) because of geological conditions and preliminary analytical results obtained in
the field.
2.1.1 Bedrock Well
One Bedrock well (MW-3) was drilled using 9 5/8-inch hollow-stem augers until
refusal was encountered at 82 ft below ground surface (BGS). Four-inch polyvinyl
chloride (PVC), schedule 40 casing was then installed and grouted to the surface.
Drilling continued into the bedrock by use of the air-rotary method. A 3 3/4-inch
borehole was drilled to a final depth of 150 ft BGS, creating a 68-ft open-hole well.
Other than the depth where the drill cuttings became wet (signifying the water table)
and the approximate depth of the competent rock (bedrock), this borehole was not
logged. This was in part due to time constraints and the fact that MW-2
(approximately 20 ft to the southeast) was logged prior to drilling MW-3.
2.1.2 Overburden Wells
ldrn:rne/ELLIS/FR-4494
Four monitor wells were drilled and screened in the overlying· sediments and
saprolite (MW-1, MW-2, MW-4, MW-5). Refer to Figure 2 for locations. Hollow-
stern augers were used and split-spoon samples were collected at the surface and at
10-ft intervals thereafter. No split-spoon samples were collected at MW-4 as per the
OSC's request and l>ecause it was suspected as being hydraulically upgradient of the
groundwater plume.
MW-1, MW-2 and MW-5 were each drilled to the top of the bedrock surface._ A 10-
ft length of 10-slo.t ( 0.010 in.) PVC screen was set for wells MW-2 and MW-5. Toe
remainder of the boreholes were cased off using the 4-inch, schedule 40 PVC riser
pipe. A "pure· silica sand filter pack was used to set the screens (approximately 2
ft above the top of the screen), followed by a 2 to 3 ft bentonite plug. Toe remainder
of the annular space was grouted using a bentonite (Quik-Gel)/cernent (Portland)
mixture. Toe total depths for MW-2 and MW-5 were 89 ft and 113 ft, respectively.
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MW-I was installed in the immediate vicinity of the suspeaed source area. A
stainless steel screen (10-ft length, IO-slot, schedule 10) was used based on the
potential for high concentrations(>.! ppm) of solvents. Toe total depth for MW-I
was 112 ft.
The screen for MW-4 was set five ft into the bedrock rather than at the surface.
This was not done for any particular reason other than the drillers had switched to
the air rotary method prior to reaching competent rock and stopped approximately
five ft into rock. This boring was logged by describing the bit soil returns. The total
depth for MW-4 was 79 ft.
2.2 Geophysical Well Logging
Geophysical well logging is commonly employed to obtain physical property and lithologic
information from wells and borings. Subtle physical property variations, related to important
hydrogeologic parameters, can be measured very accurately by geophysical logging
instruments. The information obtained can most often supplement and enhance that from
drillers' logs and lithologic logs.
2.2.1 Brief Theory of Operation
ldm:me/ELL!S/FR-4494
Only a brief theoretical explanation of the logging tools used on this site will be
presented in this reporL Further theoretical details can be obtained from Geonics
Technical Note TN-20 (Geonics, 1989). Additional references on well logging in
groundwater investigations and hazardous waste site evaluation include Keys and
McCary (1971), and Daniels and Keys (1990) .
The logging instruments used were the EM39 Conductivity Logger, and the GAMMA
39 Gamma Ray Logger, both manufactured by Geonics, Ltd. Toe EM39 is. an
induction tool and the GAMMA 39 is a natural gamma-ray tool. Boih tools can be
used in a PVC-cased boring or well .
EM39 Conductivity Logger
This tool measures the apparent conductivity of geologicai' strata surrounding the
borehole. Conductivity is a measure of how well an electrical c;urrent can pass
through a material. in geological units at shallow depths, there are three basic
modes of electrical conduction. Toe first of these is metallic conduction, which only
occurs along metallic mineral grains such as pyrite (or other sulfides, or graphite).
in the application rep<;>rted upon here, this mode is not significanL
Toe second mode of conduction is ion transport in solution. This is the most
common mode of conduction and occurs even in the unsaturated zone (above the
water table) along the wetted surfaces of mineral grains and grain boundaries. Toe
ion transport mode of conduction is enhanced by: (a) increasing the number of
charge carriers in solution (the salinity, or the total dissolved solids [IDS]), (b)
increasing the valence of the ions (the charge on the ion), and (c) increasing the
mobility (ability of the ion to move through the water molecules [depends on size
and shape of the ion]) of the ionic species. in the ion transport mode of conduction,
the salinity or TDS is often the main contributor.
I.
ldm:me/ELLIS/FR-4494
Toe third mode of conduction is surface conduction along clay minerals in solution.
Toe magnitude of this mode of conduction far exceeds the magnitude of conduction
caused by io_n transpon in solution. Consequently, although electrical current will 1•
flow through most• geologic material, conduction is greatly enhanced if clays are
present
Bulk conductivity is influenced by the geometry of the conductive region. For
example, in an unconsolidated deposit of clean sand, the bulk conductivity is related
to the conductivity of the pore water and porosity using Archie's Law (Archie, 1942).
This relation is:
a, = c·a~m
where: a, = true value for conductivity
a. = fluid conductivity
4> = porosity
c" = a constant called the formation factor
m = a constant called the cementation factor
As can be seen, the grain-size (related to the porosity) affects the ,bulk conductivity.
1n addition, faults, fractures, microfractures, panings, and foliations in bedrock affect
the local bulk conductivity both through increases in porosity and permeability, and
also because minerals deposited along fracture surfaces often increase the
conductivity of the fracture.
Therefore, the EM39 induction tool is most often a clay quantity sensor in
unconsolidated sediments above the bedrock surface. When more clay is present, the
conductivity is enhanced above a more clay-depleted interval.
GAMMA 39 Gamma-Rav Logger
This tool measures natural gamma rays emitted by geological strata surrounding the
borehole. Most often, clays emit a higher amount of natural gamma radiation than
sands. Therefore, a natural gamma tool can be used to determine the qualitative
amount of clays present in a geologic interval. This tool is used with the EM39 to
discriminate between conductive intervals due to clays and those due to an elevated
TDS.
An important limitation of natural gamma logging is hole diameter variation.
Variations in hole diameter can cause a corresponding variation in gamma ray
counts. This can occur in standard monitor well design where the hole size changes
between overlying sediments (e.g., drilled with hollow-stem augers) and bedrock (e.g.,
drilled by air rotary). In consolidated formations, washouts and other types of hole
diameter fluctuations will produce gamma fluctuations. When available, caliper logs
can be used to identify sour= of these variations. 1n any case, hole diameter
variations need to be kept in mind in gamma-ray log interpretation.
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2.2.2 Acquisition of Field Data
A total of six wells were geophysically logged during site fieldwork activity on June
1-6, 1991. Of these, three were existing wells, Shopping Center Well, Mahaffey Well 1
B, and the Elementary School Well, and the remaining three, MW-1, MW-2, and
MW-5, were new wells. Both ronductivity and natural gamma data were rollected
at 0.1 meter (4-inch) intervals, and wells were logged going both down and up,
producing two data sets per well. Both data sets are not presented in the graphs
(Figures 5 through 10) due to the redundancy of information. However, these
redundant data sets were examined for repeatability and determination noise level.
2.3 Field Analytical Screening
Soil samples were rollected at three of the five drilling locations (MW-1, MW-2, MW-5)
using split-spoon samplers lined with a butyrate (plastic) sleeve. Once removed, these sleeves
were capped at the ends and kept rool (4 • C) until they were released under chain of custody
to the field laboratory.
The analysis consisted of puncturing the sleeve and withdrawing an aliquot of the soil
headspace with a syringe. The aliquots were injected into a Photovac Gas Chromatograph
(GC) Model 10550. Sample chromatograms were rompared to those of standards. Target
compounds were identified by retention times and quantified by the response factors for the
corresponding standards. A total of 23 sleeves were analyzed ..
Water samples were also rollected and analyzed in the field using the portable GCs. Thirty
40-milliliter (ml) vials were shaken and allowed to equilibrate before a headspace aliquot was
withdrawn and analyzed. Any identifiable rompounds were quantified using the same method
as with the sleeve samples .
3.0 RESULTS
3.1 Soil Headspace Results
The results for the photovac GC headspace analyses, performed on the soil (sleeve) samples
are presented in Table 2. Once the quality assurance (QA) validation was ,performed, the
final reponed values differed somewhat from the preliminary field results (as reponed in the .
Trip Repon: Well Installation and sampling Activities at the Nonh Belmont Road Site,
North Belmont, NC). Most of the discrepancies were related to probable inierferences from
coeluting compounds. Therefore, some of the tentatively identified "hits" have since been
included with the total unknowns. Only the QA-validated data is included and will be
discussed in this repon.
Monitor Well MW-!
This was the only borehole ·that contained detectable levels of PCE in some of the soil
headspace samples. No other target compounds were positively identified, although, there
were probable interferences that were not PCE. The PCE roncentrations (where detected)
decreased respective to the sample depth. Sample MW-1 (10'-12') contained 469 ppb, sample
MW-1 (20'-22') contained 364 ppb, and sample MW-1 (70'-72') had 209 ppb. Except for two
samples, MW-! (4D'-42') and MW-! (60'-62'), the concentration of the total unknowns also
decreased with depth .
ldm:me/ELLIS/FR-4494
11
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3.3 Geophysical Logging Results
Toe geophysical logging results are presented here for each well, while and an overall
interpretation is presented in Section 4.0. The sequence of logging results will be: the
Shopping Center Well, MW-2, MW-1, Mahaffey Well B, Elementary School Well, and MW-5.
This sequence forms a NW to SE cross-section across the site, which is thought to be
perpendicular to the contaminant flow direction.
Geophysical well log data plots along with well construction details and lithology for these
wells are shown in Figures 5 to 10. Data values are plotted at the same scale for all plots so
comparisons can easily be made between wells. In addition, the venical depth scale is the
same for all plots. Natural gamma-ray units are counts per second (counts/s), and
conductivity units are milli-Semens per meter (mS/m).
Shopping Center Well
Geophysical well log data from the Shopping Center Well are shown in Figure 5. Results
are plotted on two pages in order to maintain a constant depth scale for all plots in this
report. Llthologic descriptions and well construction details were unavailable.
A relatively high gamma-ray count from the surface (>30 counts/s) down to 9 ft is indicative
of a bentonite clay seal. A.change to lower amplitude and longer spatial wavelength of the
gamma radiation at 14 ft indicates the top of saprolite .
At 77 ft depth, a change in base level occurs. This is thought. to be due to a change in hole
diameter upon entering competent bedrock. Most likely, hollow-stem augers were-used in
the overburden and saprolite, and air or mud rotary was used in the competent rock. In
addition, the upper portion of the well was cased with steel, accounting for the lack of
conductivity data down to 77 ft. This steel casing also prevents very low, marginal energy
gamma rays from entering the well bore to be count<:!d at the detector.
Further change in the gamma log at 105 ft to a lower frequency, higher amplitude response
indicates possible bedrock fracturing at this depth. This type of response continues down to
165 ft .
Conductivity variations indicate possible lithologic boundaries at 198,222, and 265 ft depths.
No additional information is available to further explain these responses. ·
These geophysical well logs stop at 280 and 290 ft for the gamma and conductivity data sets,
respectively, due to the 100 m cable length on the Geonics EM-39 system.
Monitor Well MW-2
Geophysical well log data plots for MW-2 are shown in Figure 6. A relatively high base level
in the gamma log (50-75 counts/s) in the upper portion of the log, which changes abruptly
to more normal values (below 25 counts/s) in the sand filter pack, indicates that the grout in
the well was more radioactive than the local geological units. This material shields this well
from any natural gamma signal which might have been interpretable from-the formation.
ldm:me/ELLIS/FR-4494
I
------~-------
Steel surface casing causes the large fluctuations in the conductivity log down to about 3 ft.
A high conductivity unit (35 mS/m) grades into a lower unit ( < 15 mS/m) at 5 ft. This low
conducmity unit corresponds to a red silty clay in the lithological description.
At 22 ft, a lithological boundary is shown signifying a color change to light brown. Near this
depth, tbe conductivity log begins a rise to values greater tban 35 mS/m. Based upon this,
and a similar response in MW-5, tbe top of saprolite is picked at 22 ft, rather than 55 ft as
indicated in tbe lithological description. ·
The bentonite seal appears in both tbe gamma and conductivity logs as a high (as it normally
does), placing the seal at 71-73 ft, slightly above what was reported and drawn on the well
construction diagram.
Monitor Well MW-1
The natural gamma-ray well log data plot for monitor well MW-1 is shown in Figure 7. The
well was logged while the steel hollow-stem augers were in place, so conductivity data were
not collected in this well.
A higher surficial gamma response correlates to tbe reddish-brown silt and clay in the
lithologic description from Oto 5 ft. A 12.5 counts/s base level continues from 5 to 30 ft in
a light brov.n clay. Saprolite begins at 30 ft, as indicated in tbe lithological description, and
tbe gamma-ray counts increase to a higher base level for Ibis uniL
Mahaff<,v Well B
Natural gamma-ray data for Ibis well are plolled in Figure 8. No conductivity data were
collected in this well because it was steel-cased. In addition, both well construction and
Iithologic information were unavailable for this well.
Surficial high gamma activity grades down to a lower level within the upper 5 ft of this well.
This surficial unit is most likely the same reddish-brown silt and clay which had a similar
gamma-ray response in MW-1.
The top of saprolite is picked at 28 ft where a constant base level of about 12.5 counts/s
begins. A change in response at 108 ft depth is interpreted to mark the t~p of competent
bedrock. At 136 ft, the amplitude increases and tbe spacial frequency decreases. A bedrock
fracture zone is interpreted to begin at this depth and continue to tbe bouom of the data seL
"PJementarv School Well
Natural gamma-ray data for this well are plolled in Figure 9. As in the previous well, no
conducmity data were collected in this well because it was steel-cased. In addition, both well
construction and litbological information were unavailable for Ibis_· well.
From O to 2 ft depth, a high gamma response occurs and is probably indicative of the same
surfi:::ial reddish-brov.n silt and clay unit as is in tbe other wells.
A chang:: in response at 23 ft is picked as the top of saprolite, and another change at 105 ft
is picked as the top of competent bedrock. A larger amplitude, lower frequency response,
interpreted to be a bedrock fracture zone begins at 127 ft and continues to the end of the log.
ldm:metELLIS/FR-4494
Monitor Well MW-5
Geophy.;ical well log data for monitor well MW-5 are plotted along with well construction
details and lithology in Figure 10. A higher gamma-ray oount base level exists throughout
this well indicating possible radioactive cement grout as in MW-2, c::xcept the level is not
quite as high. Toe drop from about 40 oounts/s to 25 oounts/s at the beginning of the sand
filter pack at 102 ft also indicates that the upper portion oontaining the cement grout is
radioactive. Also note the gamma and conductivity highs at the bentonite seal.
A high gamma activity and conductivity at the surface is similar to that observed in other logs
on this site which oorrelated to a reddish-brown silt and clay. This thin unit is not mentioned
in the lithological description for this well, rather a fairly thick interval with that description
is shown down to 21 ft.
Both gamma and oonductivity logs mimic each other with a large response from 16 to 29 ft
indicating a higher concentration of clay.; in this interval. However, a fluctuation at 21 ft
correlates with the top of saprolite as depicted in the lithological description. Toe saprolite
wne is marked by a relatively large conductivity response and fairly constant gamma
response; both responses similar to those observed in MW-2.
A large conductivity response (>35-40 mS/m) occurring from 60 to 85 ft BGS is not
accompanied by a large gamma-ray response. This most likely indicates more conductive pore
water in this region and may correlate to a more significant water-bearing wne than within
the same unit, but higher or lower in section.
3.3.1 NW -SE Cross Section
A NW • SE interpretative cross-section has been drawn using the natural gamma-ray
logs of the six wells interpreted above, and is shown in Figure 4. Well logs have
been plotted offset using their relative elevations in order to more ac.."llrately depict
the geology across the section. Shown on this section are the positions of the
relevant hydrogeologic units: overlying sediments, saprolite, unweathered bedrock,
and the proposed fracture wne horiwn.
4.0 DISCUSSION OF RESULTS
Based upon the current field effort in drilling and geophy.;ically logging three new monitor wells and
three existing wells at the North Belmont Site, a more accurate depiction of the stratigraphy and
hydrngeologic framework has resulted.
Based on the interpretation of the geophysical well logs collected from the wells available at the North
Belmont Site, there appears to be a more highly fractured wne located in the upper portions of the
competent bedrock. This wne would serve to transmit groundwater more freely than the wne above
or below the fractured woe. Toe upper wne may retain some of the features (fractures) of the
underlying woe, but would not serve as well for the transmittance of groundwater as the more
fractured wne directly below. Toe wne below the more highly fractured wne of bedrock would
exhibit the same characteristics of the overlying wne with the c::xception of the amount of fracturing.
It is likely that more fracturing c::xists in this intermediate wne due to the influence of chemical
weathering on the bedrock and release of confining pressure associated with proximity to surface.
ldm:me/ELLIS/FR-4494
I I.I
3.2.2 GC/MS Results
Eight aqueous samples were sent to the ERT/REAC laboratory for confirmatory
GC/MS analysis. These samples included the five monitor well samples, two trip
blanks and a rinsate sample. Toe results of these analyses are presented in Table 4
of this report and Table 1.1 in the Final Analytical Repon. No detectable levels of
the target compounds were found in either well MW-2 or the upgradient well, MW-
4.
Three contaminants were detected in the sample from well MW-5. A concentration
of 13 ppb for 1,4-diclorobenzene, 14 ppb for acetone and an estimated 1.9 ppb for
toluene. Toe presence of acetone may be attributed to the decontamination
procedure used on-site and/or the laboratory. The other two compounds were not
present in any other samples and are probably not related to the dry-cleaning
operation.
Toe deep, bedrock well (MW-3) sample contained low levels of two of the target
compounds. Those detected were cis-1,2-.!ichloroethene (cis-1,2-DCE) · at an
estimated 35 ppb and PCE at 8.7 ppb. Toe comparison between the field results an~
the confirmation result for PCE is good (11 ppb vs. 8.7 ppb). The compound cis-1,2-
DCE was not analyzed for in the field.
A sample from the well that was drilled in the vicinity of the suspected source area
(MW-1) had the highest concentrations of target compounds, relative to the other
monitor wells. Concentrations of 14 ppb for cis-1,2-DCE, 7 ppb for TCE and 148
ppb for PCE were reported.
' Toe GC/MS value reported for PCE was much lower than those reported in the field
using the Photovac GC.
The explanation for this difference is contained in the attached memorandum
(Appendix). In general, a number of sample analyses exceeded the calibration range
of the Photovac GC instrument and have therefore, been flagged (QC) as estimates
in Table 3.
Each of the QA samples (trip blanks, rinsate blanks) contained one or more of the
following compounds: chloroform, acetone and 2-butanone. These are considered
common laboratory contaminants and since they appear in the blanks should not be
considered as representative of the contamination at the site.
3.2.3 PCE/fCE Groundwat~r Plume
ldm:m e/ELLIS/FR-44 94
Figure 3 depicts the approximate areal extent of the PCE/fCE groundwater plume
that could be mapped using the most current sample results. There are two wells
within this area that produced samples with no detectable levels of contaminants
(Mahaffey Well A and NB-30). It is suspected that these wells were completed in
the overburden/saprolite zone and are, therefore, not intersecting the deeper,
preferential-flow zone. The apparent effect on the plume that pumping the school
well had is also evident in this figure.
.. 1•-•J1.D>r ··'."'"'
Monitor Well MW-2
There were probable interferences with respect to other compounds, in three of the live
samples analyzed from this borehole. These interferences involved the compounds vinyl 1
chloride (VC), 1,1-dichloroethylene (1,1,-DCE) and trans-1,2-dichloroethylene (t-1, 2-DCE)
and occurred in the samples collected from 10 feet, 20 feet and 30 feet BGS. No TCE or
PCE was detected. Toe concentration for the total unknowns decreased with depth.
Monitor Well MW-5
Only two samples collected from this borehole contained detectable levels of unknown
compounds. Sample MW-5 (20'-22') exhibited a probable interference involving t-1,2-DCE
and contained 3113 ppb total unknowns. Sample MW-5 (80'-82') also contained total
unknowns at 125 ppb. .
Two samples were submitted as replicate samples for depth intervals 70'-72' and 90'-92'.
There were no compounds detected in either sample or its respective replicate sample.
3.2 Wa_ter Headspace Results
3.2.1 Field Screening
ldm:me/ELLIS/FR-4494
A total of 30 samples and live replicates were submitted to the field laboratory for
target compound screening using the Photovac GC method. A detection limit of 10
ppb was reponed.
Toe results for these analyses are presented in Table 3. Besides these analyses, a
sample from each of the monitor wells (MW-2 through MW-5) was sent to the
ERT/REAC laboratory for confirmatory gas chromatograph/mass spectrometer
(GC/MS) analysis.
Of the twenty-two private wells that were sampled, eight contained detectable levels
of PCE (201 Goshen, 203 Goshen, 204 Goshen, Hughes Well, NB-33, NB-20, NB-26
and Mahaffey B), four of which also contained TCE (201 Goshen, 204 Goshen,
Hughes Well and Mahaffey B). The concentrations of PCE ranged from ND to
43,100 ppb. TCE values ranged from ND_ to 1,115 ppb.
A comparison of these results with those from the February/March, 1991 sampling
events confirms the presence of contamination in all but two wells (NB-25, NB-30),
although the reponed concentrations are generally much higher for this most r=nt
field screening evenL
With respect to the monitor wells that were installed, MW-1 contained 555 ppb of
PCE and the replicate sample had 791 ppb PCE. The deep well (bedrock) was the
only other well with a detectable level of PCE (11 ppb). Well MW-5 contained 11
ppb of total unknowns.
IL
-.~~
.. ~t.".:""
In addition to the above geological interpretation obtained by geophysical well logging, some other
information bas been obtained which indicates the existence of differing wnes of groundwate.r now.
Based upon sampling the three new wells drilled down to competent bedrock, sampling the three
other existing wells which were also geophysically logged, and a sampling effort of all available •
domestic wells in the area, there appears to be a correlation between the depths of the wells and the
amount of contamination present in the wells. The correlation is positive in respect to the depth of
the wells and the amount of contamination present For example, MW-3 is 150 ft deep and the water
from the well was contaminated with 8.7 ppb PCE; MW-2, located adjacent to MW-3, is 89 ft deep
and was not contaminated. The two Mahaffey wells are another example, in that, they are adjacent
but suspected of being completed in separate wnes (Well B is some 65 ft deeper than Well A).
Mahaffey Well B was determined to be contaminated with both PCE and TCE based on Pbotovac
analysis, while Mahaffey Well A was clean (no detectable target •compounds). The relationship
between the depth of the wells and the amount of contamination present in the wells indicates a wne
of preferential Dow. This wne, at about 25 ft below competent bedrock, is capable of producing large
quantities of water as a result of the presence of fracturing or other types of structures which enhance
groundwater Dow. Due to the hydraulics of such a wne, contaminants would be drawn toward and
transmilted through this wne more readily than in the wne directly above. ·
5.0 CONCLUSIONS
In the vicinity of the site, two wnes of groundwater are interpreted. The top of the saturated wne
down to an interpreted bedrock fracture wne comprises the upper wne. The second wne of
groundwater would include this more highly fractured wne, which begins down a short distance into
competent bedrock. Of these, the lower wne is thought to be the most transmissive. Most wells
drawing water from this lower wne have been contaminated, while out of the shallower wells, only
the well near the source area (MW-1) bas been shown to be contaminated.
6.0 RECOMMENDATIONS
It is recommended to test the aforementioned hypothesis, that is, whether contamination is migrating
along a bedrock fracture wne at about 130 ft depth. Some hydraulic testing such as a pump test
would indicate if the upper and lower wnes are indeed hydraulically connected, and would provide
information necessary for remediati.on. Also, more data collection and analysis including: particular
residential well construction data (depths of screened interval, etc.), regular intervals of residential
and monitor well sampling, as well as static water level measurements, would assist in a more accurate
assessment of this site.
ldm:me/ELLIS/FR-4494
REFERENCES
Archie, G. E., 1942, Toe electrical resistivity log as an aid in determining some reservoir characteristics: Arn.
Inst. Min. Metallurg., Petr. Eng. Tech. Pub. 1422, p. 1-8.
Bates, Robert L., and Jackson, Julia A, Editors, 1987, Glossary of Geology, Third Edition: American
Geological Institute, Alexandria,. VA
Daniels, J. L, and Keys, W. S., 1990, Geophysical well logging for evaluating hazardous waste sites; in Ward,
S. H., Ed., Geotechnical and Environmental Geophysics, Volume I: Review and Tutorial:
Investigations in Geophysics No. 5, Society of Exploration Geophysicists, Tulsa, Oklahoma, p. 263-285.
Geonics, Ltd., 1989, Theory -EM39 borehole conductivity meter: Technical Note TN-20, Geonics Ltd.,
Mississauga, Ontario, Canada.
Goldsmith, Richard; Milton, Daniel J.; and, Horton, J. Wright, Jr., 1988, Geologic Map of the Charlotte 1
degree x 2 degree Quadrangle, North Carolina and South Carolina: Map 1-1251-E, with accompanying
text. Miscellaneous Investigations Series, United .States Geological Survey, Washington, D.C.
Keys, W. S., and McCary, L. M., 1971, Application of borehole geophysics to water-resources investigations;
in Techniques of water-resources investigations of the United States Geological Survey, Book 2,
Chapter El: U. S. Geo!. Surv., 126 p.
Thompson, Doc, Gaston County Health Department, Environmental Division, Gastonia, NC.
USGS, 1970, Mount Holly, N.C., 7.5 Minute Series Topographic Quadrangle: United States Geological
Survey, Washington, D.C.
ldm:me/ELLIS/FR-4494
, D
1,
' IJ
Ii
IJ
lj
lfj
la .. l~i.
r._
..
•• •• l,1
•• •• lg ... ...
Well ID
MW-1
MW-2
MW-4
MW-5
Mahaffey Well A
TABLE 1
WATER TABLE DATA
NORTI-IBELMONTROADSITE
NORTI-1 BELMONT, N.C.
MAY 28-JUNE 13,1991
•data represents only one round of measurements•
Top of Casing Depth to Water Table
El::vation (ft) (ft)
739.88 31.08
734.18 27.55
734.74 3690
727.22 26.54
736.58 30.06
Elevation of Water
Table (ft)
708.80
706.80
706.84
700.68
706.52
Sample
Location Number vc
=======-========= .----===== ========= MW-1(0-2 1 ) Al0481 ND
MW-1(10-12 1 ) Al0482 ND
MW-1(20-22 1 ) Al048J I
MW-1(J0-J2 1 ) Al0484 ND
MW-1(40-42) Al0485 I
MW-1(50-52 1 ) Al0498 I
MW-1(60-62 1 ) Al0499 ND
MW-1(70-72 1 ) Al05O0 BMDL
MW-2(0-2') Al·0476 ND
MW-2(10-12 1 ) Al0477 I
MW-2(20-22 1 ) Al0478 I
MW-2(30-J2') Al0479 I
MW-2(55-57 1 ) Al0480 ND
MW-5(0-2') Al0486 ND
MW-5(10-12') Al0487 ND
MW-5(20-22') Al0488 ND
MW-5(30-32') Al0489 ND
MW-5(40-42 1 ) Al0490 ND
MW-5(50-52 1 ) Al0491 ND
MW-5 ( 60-62 1 ) · A10492· ND
MW-5(70-72 1 ) Al0493 ND
MW-5 (70-72 1 ) REP Al0493 ND
HW-5(80-82') Al0494 ND
MW-5(90-92 1 ) A10495 ND
MW-5(90-92')REP Al0495 ND
=-=============== ========= =====-===
Abbreviations:
1,1-DCE -1,1-Dichloroethylene
t-1,2-DCE -trans-1,2-Dicl1loroethylene
TABLE 2
SOIL HEADSPACE RESULTS
NORTH BELMONT ROAD SITE
NORTH BELMONT, NC
MAY 28 -JUNE.13, 1991
(all results in ppb)
1,1-DCE t-1,2-DCE TCE PCE
========= ========= =--------=========
I ND ND ND
I ND ND 469
BMDL BMDL ND J64
I ND ND BMDL
I ND ND ND
ND ND ND ND
I ND ND ND
BMDL ND ND 209
ND BMDL ND ND
I I ND ND
I ND ND ND
I ND ND ND·
BMDL BMDL ND ND
ND ND ND ND
ND ND ND ND
ND I ND ND
ND BMDL ND ND
ND BMDL ND ND
ND ND ND ND
ND BMDL ND ND
ND ND ND ND
ND ND ND ND
ND ND ND ND
ND ND ND ND
ND ND ND ND
========= ========= ========= =========
TCE -Trichloroethylene
PCE -Tetrachloroethylene
Total Total
Targets Unknowns
========= =========
0 141080
469 77442
J64 5255
BMDL 2564
0 JlJ6
0 574
0 2227
209 130
BMDL 68464
0 40797
0 6755
0 2087
BMDL 149
0 ND
0 ND
0 3113
BMDL ND
BMDL ND
0 ND
BHDL ND
0 ND
0 ND
0 125
0 ND
0 ND =====--== =========
VC -Vihyl Cl1loride
ND -Not Detected REP-. Replicate BMDL -Below method detection limit (200-ppb).
I -Probable interference from coeluting compounds; interfering peaks included in total unk11ow11s.
-la
"
TABLE 3
WATER HEADSPACE RESULTS
NORTH BELMONT ROAD SITE .
NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
(all results in ppb) TotalJ. ._ Location
m,. =-:=~7~~f--
Sample
NUlllber 1,1-DCE _ TCE PCE
Total
CLB Targets Unknowns ==---== === ==== =======
..
MW-2 (RAW)REP
Mahaffey A
201 Goshen Ave
..
. 203 Goshen Ave
204 Goshen Ave
spirit Church
shopping Center
Clanton
Collette
Hughes Well
..
NB-66
NB-33
NB-24
' NB-20
•··• NB-27 NB-28
, NB-30
·~ NB~!~l~p
,. NB-19 REP
·~ ~:=;: ,. NB-22
I) NB-25
I'. NB-23
Mahaffey B
, MW-1 1_1; MW-1 REP
MW-2
, MW-3 '
•• i MW:::-~p
MW-5
ABC 10496
ABC 10497
ABC 10497
ABC-10501
ABC 10502
ABC 10503
ABC 10504
ABC 10505
ABC 10506
ABC 10507
ABC 10508
ABC 10509
ABC 10512
ABC 10513
ABC 10514
ABC 10515
ABC 10516
ABC 10517
ABC 10518
ABC 10518
ABC 10519
ABC 10519
ABC 10520
ABC 10521
ABC 10522
ABC 10523
ABC 10524
ABC 10525
ABC 10526
ABC 10526
DEF 10527
DEF 10528
DEF 10529
DEF 10529
DEF 10530
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
BMDL
ND
ND
ND
BMDL
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
BMDL
ND
ND
ND
ND
12
BMDL
95 QC
ND
ND
ND
ND
1114 QC
ND
BMDL
ND
BMDL
ND
ND
ND
ND
ND
ND
ND
BMDL
ND
ND
ND
128
BMDL
BMDL
ND
BMDL
ND
ND
ND
ND
BMDL
BMDL
ND
24
15
1007 QC
ND
BMDL
ND
ND
43100 QC
ND
36
ND
107
ND
ND
BMDL
BMDL
BMDL
BMDL
ND
52
ND
BMDL
ND
14704 QC
555 QC
791 QC
ND
11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND ND.
ND
ND
ND .ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0
0
0
0
36
15
1102 QC
0
0
0
0
44215 QC
0
36
0
107
0
0
0
0
0
0
0
52
0
0
0
14832 QC
555 QC
792 QC
0
11
0
0
0
·-~~:;~ia~i~~~:Dichloroethylene :::=: Te:::::::ro::hyl:::====
1 _, TCE -Trichloroethylene CLB -Chlorobenzene
IND -Not Detected REP -Replicate
BMDL -Below method detection limit (l0ppb).
; •• QC -exceeds calibration
1r
I I 1r I t•·
---------
BMDL
BMDL
BMDL
ND
50
29
94
ND
ND
ND
BMDL
1156
ND
BMDL
BMDL
12
ND
ND
ND
ND
ND
ND
ND
BMDL
ND
ND
BMDL
118
BMDL
BMDL
ND
BMDL
BMDL
BMDL
11
---·------. ·--·, •· ---: ... ,...:i~ .. •· .. , ...
~-
..... : ..
.-~ -~·;•;
~ . TABLE 4
-GC/MS RESULTS OF AQUEOUS voe ANALYSIS
~ NORTH BELMONT ROAD SITE
NORTH BELMONT, NC 1.,
MAY 28 -JUNE 13, 1991
~ PROJECT I : lOmt IE.!OIT,)494
smu t : Lt4! 9../H( lDSH l~V 10~1
~ l..OCATIOI : Lt4! 9../H( 19 . IM-2 rv-5
ClllECTED : 6117191 6116191 6117191
Mt.'tZED : 116l1D/91 0611.B/91 06tlD/9l . 11611.B/91
~ FILE I ~m ~lli ~2)7 -~2J9
OIL. FICT.: l 1 1 1
LIIIT ugll ugl\. uglL uglL
~ ~ CIJC. ra. CIJC. ra. CIJC. ra. CIJC. ra.
Oichlorodilluat11•lh1ne IC) 11.1 IC) 11.1 IC) 11.1 IC) 10.1
~-
O,loroathane IC) ll.l IC) 11.8 II) 11.1 IC) 1D.O
Vinyl O,loricle IC) 11.1 IC) 11.0 IC) 18.t IC) 11.0
8r09D•lhane IC) .11.1 IC) 10.0 IC) 10.a IC) ll.l
~ O,lot111th1ne IC) ll.l IC) 11.1 IC) 11.1 IC) 10.0
Trichlorolluaro•thane IC) 5.1 IC) 5.1 IC) 5.a IC) s.o
1,1-0ichloro■th■n■ IC) S.I IC) 5.1 IC) 5.1 IC) . ;.o
~-
· l'eth)ll■n■ O.lorid■ IC) 5.1 IC) 5;1 IC) 5.1 IC) 5.0
trana-1,2-0ichloMllthen■ IC) 5.1 II) 5.1 IC) 5.1 IC) 5.8
l,l-OichloM11than■ IC) 5.1 IC) 5.1 IC) 5.8 IC) 5.D
2,2-0ichlorOJlrOJI-· IC) 5.1 IC) 5.1 ' IC) 5.a IC) 5.a
IE' cis-1,2-0ichloro■th■n■ II) 5.a II) 5.1 II) 5.D IC) 5.0
.,. O,loro!or ■ IC) 5.1 7.1 5.0 IC) 5.1 IC) 5.1
l,l,l-TrichloM11th.,. II) 5.1 II) 5.1 IC) 5.8 II) 5.o
·-··. Carbon T■trachlorida IC) 5.0 I() 5.0 IC) s.o IC) 5.0
·. 1,1-0ichlrOJlrOJl■ne IC) 5.0 IC) ~-8 IC) 5.0 IC) 5.D
I Benzene IC) 5.1 IC) 5.1 IC) 5.1 IC) ;.o
•r· l,2-0ichloMllthan■ I() 5.1 II) 5.1 IC) 5.8 IC) 5.8
Trichloroalhen■ IC) 5.1 I() 5.1 IC) S.I IC) 5.1
l,2-0ichlor09r~ IC) S:1 IC) 5.1 II) 5.0 IC) 5.D
Oibro-,•thMt IC) 10.1 IC) 10.0 IC) 10.1 IC) 10.8 .~)' Broaodichlor-thane IC) 5.1 IC) 5.8 IC) 5.a IC) 5.1
.,: tr1111,-l,)-Oichlaropropen■ IC) 5.1 IC) 5.1 IC) 5.1 IC) 5.1 .
cis-l,J-OichloropropeM IC) 5.1 IC) 5.1 IC) 5.1 Iii 5.o
Tolu■ne IC) ;:1 IC) 5.0 IC) 5.0 l. 9 J 5.1
l,1,2-TrichlOMllthln■ IC) 5.1 IC) 5.8 II) 5.1 IC) 5.0 ., Totr1chloM11lh■ne IC) 5.1 IC) 5.0 IC) 5.1 IC) 5.1
1,)-0ichlor~. IC) 5.1 IC) 5.a II) 5.t IC) 5.8
Dibro-,chloro•than■ IC) . 5.1 IC) 5.1 IC) 5.1 IC) 5.1
1,2-0ibro-thane IC) 5.1 II) 5.1 IC) 5.a IC) 5.a
I I 0, lorobenzan■ IC) 5.1 IC) 5.1 IC) 5.1 IC) 5.1
1,1,1,2-Totrochloroethane II) 5.1 IC) 5.1 II) 5.1 IC) 5.1
Ethylb■ll?OIII IC) 5.1 II) 5.1 IC) S.I IC) 5.1
I
p L .-Xyl ■n■ IC) 5.1 II) 5.1 IC) 5.a IC) 5.0
8 lndicat■a r■aultl IMI prnent in blri
I J lndicatn bale,., llathod O■t■ction li■it
IC) lndicat■a co■pound Not O■t ■ct■d.
·'.•·"'r.nn~ ., .,
• •M><•-.. .it;•
la '.~1· ~~· .;4(!1; . ~" ·:J!~
I.I \\~'f;J
TABLE 4 • !.P.,.f.:
GC/MS RESULTS OF AQUEOUS voe ANALYSIS /}:/• ., .
NORTH BELMONT ROAD SITE
la NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
.. PROJECT t : IOffit IIElJOIT I }494
Slffl£t : !Al !lM( 1DS31 1DS27 . lDHI
LOCATIIJI : !Al !lM( TB 111-2 111-5 .. Cll1£C1tl) : 6117191 6IG6/91 6117191
~Y2ED : 061111/91 06/10/91 06110191 06110191
Fil£ "A62Jl. "A62JS "A6237 ~2J9 ._ OIL. FfCT.: 1 1 1 ,I
llllT ug/1. ug/1. ug/1. ug/1.
~ CIK. ru.. CIK. ru.. CIK. ru.. CIK. Ill. .. o-XyltM IC) 5.1 IC) . 5.1 IC) 5.a IC) 5.G
Styrent IC) 5.1 IC) 5.0 IC) 5.8 IC) 5.D
11 Bromfora IC) 5.1 IC) 5.1 II) 5.1 II). 5.1
lsoprll?)llben111'11 IC) 5.1 IC) 5.1 IC) 5.1 II) 5.D I Broaobannne IC) 5.1 II) 5.1 IC) 5.1 IC) 5.1 ,., l,1,2,2-Tttrachlo.,..thlnl II) 5.1 II) 5.1 IC) 5.1 II) 5.8
1,2,J-Trichlaropl'09tnt IC) 5.1 IC) 5.1 II) 5.1 II) 5.1
n-l'rop\l lbenztl'II II) 5.1 IC) 5.1 II) 5.1 II) 5.1
It 2-0,lorotolutl'II II) 5.1 II) 5.1 II) 5.1 II) 5.1
1,l,S-Tri•thylben%tl'II IC) 5.1 II) 5.1 II) 5.1 IC) 5.8
I 4-0llorvtolllll'II II) 5.1 II) 5.1 II) 5.1 IC) 5.a
tert-&Jtylben~ II) 5.1 II) 5.0 · II) 5,1 II) 5.8
1t J ,2 ,4-Tr i•thylbenttl'II IC) 5.1 II) 5.1 II) 5.1 II) 5.a
stc-&ltylbenztl'II II) 5.1 II) 5.1 II) 5.1 II) 5.D I p-l1opropyltoluen1 II) 5.1 IC) 5.1 II) 5.1 II) 5.0
1t 1,l-Dichlorobtnztl'II II) 5.1 II) 5.8 IC) 5.0 II) 5.8
1,4-Dichlorvbtnttl'II IC) 5.1 II) 5.1 II) 5.1 1l 5.1 I 1,2-Dichlorobenul'II II) 5.1 · IC) 5.1 II) 5.1 II) 5.8
1t n-&ltylbtnztne II) 5.1 II) 5.a II) •. 5.1 Ill 5.1
1,2-Dibrom-}:-Chloropr~ II) 5.1 Ill 5.1 Ill 5.1 II) 5.G
I 1,2,4-Trichlorvberntl'II II) 5.1 II) 5.1 Ill 5.1 II) 5.1
llt11Chlorobutlditl'II II) 11.1 Ill II.I Ill 10.a II) lG.8
11£ HIJ,htha ltne II) 5.1 II) 5.1 II) 5.1 II) 5.1
1,2,J-Trichl~. lliiHZW• II) 11.1 II) II.I II) 10.I II). 18;1 I Acttont •. II) 11.1 , •• J 11.0 II) 18.I 14 11.1
If., c.ri-Oiaulf idl II) 5.1 II) 5.1 II) 5.1 II) 5.1
2-&ltlnal'II II) 11.1 4.4 J II.I II) u.a II) 11.a I 4-llethyl-2-l'int-II) 11.1 II) ID.I II) 11.1 II) 11.1
If 2-lleunona II) 10.1 II) ID.I IC) II.I IC) 11.0
.~ . n
I~, ·._ B lndicatn co.,..,.i ia prnent in blri
J lndic1tt1 bilOOI llethod Detection v-: · ... II) lndicatn coapound Mat Detected
•I ',\· Page 2 of 2
:{· :: . -1 ,-:--,_ n n '.:; --, .,,
_.-.;.:;.,.,;...,,,;1..:-~•
~
~ TABLE 4
GC/MS RESULTS OF AQUEOUS voe ANALYSIS
'
NORTH BELMONT ROAD SITE
NORTH BELMONT, NC
MAY 28 JUNE 13, 1991 ~ -
~ PROJECT t: IOlTli IEJ'O<T ,H94
sm>I..Et : LM 11.M: 105J2 10511 10528 10529
~ LOCATIIII : TB RB r11-, Ill-~
Cll..l.ECTED : 6112/91 6112191 6111191 6112/91
IM.Y2ED : 06/lJl'il 0611'/91 0611'/91 0611'/91 0611'191
FILE t "A62~ "A6249 "A62SI "A6252 "A625'
I.I OIL. F~.: l l l l l
lll!T ug/L ug/L ug/L ug/L ug/L
' la llffllH) CDC. l1l. CDC. l1l. CDC. l1l. CDC. rn. CDC. rn.
----------------------------
Oichlorodifluoro•th.,. I() 11.1 I() 10.1 II) 10.0 II) 10.0 IC) 10.0
I O,loro•thene IC) 11.1 II) 11.1 I() 10.D II) 10.0 II) 10 .-0
' Vinyl O,loride I() 10.I I() 10.1 I() 19.1 IC) 10.0 IC) 10.0
Broao•thane IC) U.I I() 10.0 II) 10.0 I() 10.D I() 10.0
I~
O,loro1thana I() 10.1 I() 10.1 I() 10.D I() 10.0 II) 10.0
Trichlorofluoroathlnl I() 5.0 II) 5.1 II) 5.o I() 5.0 II) 5.0
l,l-Oichloro1th1N I() 5.o II) 5.1 I() 5.0 II) 5.0 I() 5.0
!'ethylene O,loridl II) 5.1 II) 5.o II) 5.0 II) 5.0 II) ,.o
trana-1,2-0ichloroat"-I() 5.1 II) 5.1 II) 5.0 II) 5.0 II) 5.o
l,l-Oichlor011thana II) 5.1 I() 5.D II) 5.a I() 5.0 II) 5.D
2,2-Dichloroprop-I() 5.1 I() 5., II) 5.1 I() 5.0 IC) 5.0
cis-l,2-0ichlor011thene IC) 5.1 I() 5.D Ill 5.a ,., J 5.Q IC) 5.D
O,lorofora I() 5.1 4.8 J 5.8 ,.7 J 5.0 II) 5.0 IC) 5.0
l,l,l-Trichlon111thana II) 5.0 I() 5.0 IC) 5.0 IC) 5.B IC) 5.0
Carbon T,trachlorida I() 5.1 IC) 5.1 I() 5.0 IC) 5.0 IC) ,.o
1,1-Dichlropropane I() 5.1 I() 5.-0 I() 5.0 IC) 5.0 IC) 5.0
Bennna I() 5.1 IC) 5.1 IC) 5.8 IC) 5.0 IC) 5.0
.~
. 1,2-0ichloroeth.,. IC) 5.1 IC) 5.a IC) 5.0 IC) 5.1 II) 5.0
Trichlon111th9ne I() 5.1 IC) 5.1 IC) • 5.0 IC) . 5.0 IC) 5.0
1,2..0ichloroprop.,. I() 5.1 IC) 5.D IC) 5.1 IC) 5.0 IC) 5.0
Dibro.,•thane IC) 10.1 IC) 10.1 IC) 10.0 IC) 10.1 IC) 10.0
-~ Broaodichloro•thlnl I() 5.1 IC) 5.a IC) 5.D IC) 5.0 IC) 5.0
tr1n1-1,,-0ichloropropane II) 5.1 IC) 5.1 IC) 5.D IC) '. 0 IC) 5.0
cis-1,)-0ichlorapraii-IC) 5.1 IC) 5.1 IC) 5.1 IC) . 5.o I() 5.0
I Toluene I() 5.1, IC) 5.1 IC) 5.1 I() 5.D IC) 5.0
•• 1,1,2-Trichlorwthana II) 5.1 I() 5.1 IC) 5.0 IC) 5.0 IC) ,.o
Tetr1chlor011ti-II) 5.1 IC) 5. 0 IC) 5.D 8.7 5.D IC) 5.0
If
1,,-0ich loroprop,ne II) 5.1 IC) 5.0 I() 5.0 IC) 5.a IC) ,.o
Dibroaochloro•tti.ni I() 5.8 II) 5.0 IC) 5.0 IC) 5.0 t() 5.0
1,2-Dibr.-tlwine IC) 5.0 t() 5.1 I() 5.0 IC) 5.o IC) 5,0
Oilorobenzent IC) 5.8 I() 5.8 IC) 5.D IC) 5.0 t() 5.0 •t l,1,l,2-T1tr1chloro1thtne IC) 5.D I() 5.o I() 5.0 I() 5.0 IC) 5.0
Ethylbmnn, I() 5.0 IC) 5.B I() 5.0 IC) 5,0 IC) 5.0
pl 11-Xyltne IC) 5.0 IC) 5.0 IC) 5.0 IC) 5.0 IC) 5.0
.r~:
1,r 'I· a Indictlet re1ult1 lr-9 present in bltnk ..
';·t"
--:>:· J lndicat11 btlow l'athod Dtt1ction liait
I IC) lndicttn coapound Hot Dttectsd.
r
r.; Paa■ 1 of? • , 1-:-' ;_ n n .( ,., u
--la .. -.• . .:.. ,••,. '· ~ ... TABLE 4 ' y
GC/MS RESULTS OF AQUEOUS voe ANALYSIS
NORTH BELMONT ROAD SITE .. NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
._ PROJECT t : t01TH IE.J1);T ,)494
5/ffl.£ t : L.re llM: 1QSJ2 lOHl 10528 10529
l.OCATICII : TB R9 IV-) IW-4 , .. :1·
ClllE.CTED: 6/12191 6112/91 6111/91 6112/91 ·'· ._ ~YZED : 06tlJ/91 06113/91 06/1)/91 0611)/91 06tl)t91
FIL£ "A6248 "A6249 "A6251 "A6252 ·A6253
OIL. F!CT.: 1 1 1 1 l
I·
ll4IT U9'l ugtl ugtL . ugtl ug/L
~ Cil1'llJ() coc. ru. coc. ru. coc. ru. coc. ru. roe. rct
ll --------------------------
0-Xy\1111 II) 5.1 II) 5.1 II) 5.0 II) 5.0 II) 5.0 .~ Styrene II) 5.1 II) 5.1 II) 5.8 II) 5.o II) 5.o
Bromlora II) 5.1 II) 5.1 II) 5.1 II) 5.0 II) 5.0
I,opr"l"l'Ibenz-II) 5.1 II) 5.1 IC) 5.0 II) 5.1 IC) 5.Q
1P
Broaobenune II) 5.1 IC) 5.1 IC) 5.D II) 5.0 II) ;.o
l,l,2,2-T1trachioroeth .. IC) · 5.1 IC) 5.8 ·II) 5.D II) 5.0 II) s.o
1,2 1)-TrichlorD!ll'DPIM II) 5.1 IC) 5.1 IC) 5.1 IC) 5.0 II) 5.o
n-l'ropylbenzene II) 5.1 II) 5.9 II) 5.1 II) 5.0 II) ;.o
I 2-Chiorotoiulftl II) 5.1 IC) 5.1 II) 5.1 II) ;.o II) 5.0
I ;: 1,),5-Tri•thylbenz.,. II) 5.o II) 5.D IC) 5.1 II) 5.0 II) 5.0
4-ChlorotoI1111111 II) 5.1 II) 5.1 IC) .5.1 II) 5.1 II) 5.0
tert-Butylbenz-II) 5.1 II) 5.1 II) 5.0 II) 5.o IC) 5.0
I l,2,4-Tri•thyibenz9ft1• II) 5.1 II) 5.D ' II) . 5. I IC) 5.0 II) 5.o
,ec-Butylbenz.,. IC) 5.0 II) 5.0 II) 5.1 IC) 5.o II) 5.0
p-I,opropyltoluene II) 5.1 II) 5.1 II) 5.a II) 5.D II) 5.0
1,3-0ichloNI08ftIIN II) 5.1 IC) 5.1 II) 5.0 II) 5.0 II) 5.0
I l,4-0ichlorob1nzine II) 5.1 II) 5.D II) 5.1 II) 5.Q II) 5.0
1,2-0ichlor~ II) 5.1 II) 5.D II) 5.0 II) 5.0 II) 5.Q
n-Butyibenunt II) 5.1 II) 5.1 II) 5.8 II) ;.a II) 5.0
I 1,2-0ibroao-)-Olloroprop-. II) 5.1 II) 5.1 II)· 5.D II) 5.0 II) 5.o
1,2,4-Trichiorobenz""' II) 5.1 II) 5.1 II) 5.1 II) 5.0 II) 5.0
He11chiorobutedi""' II) 11.1 II) 10.1 II) 11.0. II) 18.0 II) 10.Q
I . Naphthden1 II) 5.1 II) 5.D II) 5.0 II) 5.e II) 5.o
.. ~ 1,2,)-Trichloroben?IN II) 11.1 IC) 11.1 IC) 10.0 IC) . 10.0. II) 10.0
Acetone IC) 1D.I 4.7 J lD.I 5.6 J 10.0 Ill 10.0 II) 10.0
urban Diaulfide IC) 5.a II) 5.0 II) 5.1 II) s.o II) 5.o
II 2-ButenDM IC) 10.D II) 10.1 II) u.o II) 10.0 II) 10.0
4-llethyl-2-l'lllt-IC) 10.1 II) 11.1 IC) 10.0 IC) 10.0 IC) 10.0
2-Heunon, II) 10.0 II) 10.1 II) u.o II) 10.I II) 10.0
I
I i;_-..
8 Indi~tu coapound i1 prlMllt in blri
I J Indi~tu bt low llethod Detect ion
II) Indic1t11 c.,.und Mot O.tec:tld
I Pogt 2 of 2
· · ,-~ -r· n 7 -, .-·-
-· ..
I 1..;
I
I
.;_
•.••. ·-,, .. ,,, •.,:;,--,---,.1:-----,.::::---·~·•-·r-····•-( J~·-
TABLE 4 ' G_C/MS RESULTS OF AQUEOUS voe AlllALYSIS -' -NORTH BELMONT ROAD SITE·
NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
PROJECT t : tOmt IEJ'OIT ,:M94
Slffll:t : ue flJH( 1~2,
LOCATJIJI : 111-1
CDJ.ECT£D : lvlQ/91
Mt.\'ZED : WlJ/91 WlJ/91
Fil! t "1162~ "116~
OIL. FICT.: 1 · 1
IJIIT ug/l ug/l
COf'llH) roe. Ill. roe. Ill. ------
Diehlorodifluor-th-Ill 10.1 Ill 10.1
O.loroatl>Ma Ill 11.1 Ill 11.1
Ui"'ll O,loridl Ill 11.1 Ill 11.1
e,,_tiw. Ill 10.1 Ill 11.1
O,loro1t~ Ill 11.1 Ill 10.1
Triehlorofluoroathane Ill 5.1 Ill 5.1
1,1-DiehloroethlM Ill 5.1 Ill 5.1
r.th)ll1n1 O.loride Ill 5.1 Ill 5.1
tr1n1-1,2-0ichloroethlnl Ill 5.i Ill 5.1
1,1-0iehloroet"-Ill 5.1 Ill 5.1
2,2-0ichloroproii-Ill 5.1 Ill 5.1
e it-1,2-0ichloroethlnl, Ill 5.1 14 5.1
O,lorofor■ Ill 5.1 3.1 J 5.1
1,1,1-Trichloro1thane Ill 5.1 Ill .5.1
Carbon T1trechloridl Ill 5.1 Ill 5.1
1,1-0iehlroprop■ne Ill 5.1 Ill 5.1
Sen11ne Ill 5.1 Ill ·5.8
1,2-0iehloroet"-Ill 5.1 Ill 5.1
Triehloroethlnl Ill 5.1 7.1 5.1
1,2-0ichloropr~ Ill 5.1 Ill 5.1
Dibr-thane Ill 11.1 Ill 11.1
Bro■odiehloroat"-Ill 5.1 Ill 5.1
tr1111-l,J-Oichlorop...,. Ill 5.1 Ill 5.8
eia-1,J-Oiehloropropene Ill 5.1 Ill 5.1
Toh,_ < Ill 5.1 Ill 5.1
1,1,2-Trichloreetiw. Ill ~-1 Ill 5.1
Totrachloroeti.ne Ill 5.1 141 5.1
1,3-0iehloropraii-Ill 5.1 Ill 5.1
Oibromchloroe■tiw. Ill 5.1 Ill 5.1
1,2-0ib-thane Ill 5.1 Ill 5.1
O.loroben11ne Ill 5.1 Ill 5.D
1;1,1,2-Tatreehloroethane Ill 5.1 Ill 5.1
Eth)! I benztna Ill 5.1 Ill 5.1
p L ,._Xyl1n1 Ill 5.1 Ill 5.1
B Jndic1h1 rnults 1r1 prnant in blri
Paga 1 of 2
J Indicates beh111 r.thod Detection li■it
Ill lndieatn eo■pound ._,t 0.teettd,
·•-,-,-r-ng , r. ' .. : • { ! :_ l <
-·· ····-~---·---· .. TABLE 4 ·::~Ii: GC/MS RESULTS OF AQUEOUS voe ANALYSIS -. ... NORTH BELMONT ROAD SITE
NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991 ...
lpl
PIWECTt: >D!Tll EElJO(T ,)494 ~· : ~ llJH( -1~2'
I.OCA Tl CJI : 111-1
Clll.ECTED : 6111)191
~Y2ED : 0611)1'1 0611)1'1
Fil£. ~248 ~~ ... OIL. FICT.: 1 1
llUT ug/L uqtl.
, ·~ ·~ I 1,~
11
ClJf'!U() CIIC. I'll. CIIC. I'll.
o-Kyl1n1 II) 5.1 II) 5.1
Sty,..,. II) 5.1 II) 5.1
Broaafor■ II) 5.1 II) 5.1
lsopropylbon:-II) 5.1 II) 5.1
Bro■obenzlfte II) 5.1 II) 5.1
1,1,2,2-T1trechlor01th-. II) 5.1 II) 5.1
1,2,)-Trichloroprop111e II) 5.1 II) 5.1
n-Propy I benzlfte II) 5.1 II) 5.1
2-0,lonitolulffll II) 5.1 II) 5.1
1,J,5-Tri•th)llben%eM II) 5.1 II) s.1
I 4-0,lorotolulfte II) 5.1 II) 5.1
tert-Butylbenz■N II) 5.1 II) 5.1
1,2,4-Tri•th)llbeftZ■N II) 5.1 II) 5.1
sec-Butylbanzlfte II) 5.1 II) ~-1 .
I .t ~ f{
i
I !
I
i .
p-lsopropyltolu■111 II) 5.1 II) 5.1
1,)-0ichlorobenzlfte II) 5.1 II) 5.1
l,4-0ichlorob9flz1111 II) 5.1 II) 5.1
1,2-0ichlorobenzlM II) 5.1 II) . 5.1
n--Butylb1nz111e II) 5.1 IC) 5.1
1,2-0ibni■o-}-Q,loropropane II) 5.1 II) 5.1 . ,
I .. 1. •; :.,
'
1,2,4-TrichloroblnZIM II) 5.1 IC) 5.1
He11chlorobutlldi■n1 II) 11.1 IC) 11.1
Haphthlllffll IC) .5. I IC) 5.1
1,2,)-Trichloroben1■nl IC) 11.1 II) 10.1
I Pc1tont II) 10.1 II) 10.1
Carbon Oi111~fidl II) 5.1 II) 5.1
2-But-· II) 10.D II) 10.0
I -)_ 4-l'eth)l l-2-l'lllt._ II) ID.I II) 10.D
2-HIXIIIOnt II) 11.1 II) 10.0
I ,i :;
~
I I B lndic1tu co~ is pr11111t in bin
J lndie1tu be loo, l'ethod 0.tect ion
II) lndie1tu co~ lilt O.t1etld
P191 2 of 2
11·
••
11
It
•• I rJ
Iii
•• 1:11
I ■ •• •• •• Id
I
I
I
" I NORTH·
\\'f i?if·>
~ ,!",
•' </ ..
-1:} _ . · .. fSO~ .C~ROLIN .. ~. --I o-.--n.•-
. ,, \..---._...,,~_._.-=;;:_=·~, !...~~·;_;,;···~~0-;::;;'-~'~'m~~~-=::•~•:••~
NORTH BEL»OKT ROAD P~ SITE
G.t.STONlA, NOftTH CAFIOUNA
OCTOBER, 1991 ·~ US EPA ENv"IRONYENTAL RESPONSE TEAM ~-;.."'..;0;..• ;..' _,,_ ... _.,,_."'l""'·•-··-' -------.:-~ I ~S!: D<~M• "'° AHAL. T11CA.L. co1rn1,1.:;r FIGUflt!. 1 SITE LOCATION MAP ~--~~~34C!;_. ---L..-,;~~..r.;.;.;.;..;;.;;.,,;_-
II
■
II
II
Ill
'< /
··--
/ \ OLO rooo
LION
~>1orr1iir. r.(••T('< ·1u~ .. --
IUO
I, .· .. ;.,_ FiqUI_"<_E 2,_-_,_JJ.:;i;: . · SJTE ·MAP· WITH .;'iii< ( WATER .TABLE CONTOURS I NORTH BELMONT .R1f·s1Tl l .. NORTH BELMONT/NG
i MAY 28 .JUNF; l :\ I 9S
i, us EPA ;~N'·.iIP..ON~fR;\'TAj. n2spo'NsF. Ti-:A'.· .tC:!':"l•i.::~r. O~~::.J,rt:11,; 1>!1;, '-'.AI.Y:!:"J. CIWT~/,CT /,0•0,1-;iin,.. f; v.i.• Ju1-,1•£1· ,..,._
•• .,
•• •• •• ., _:,,,..,·1·111c CC:llf,. •.,·~~~
~
i
i !
I<'JGU•RE' " ·.'-1:..-, ,_ V ·.·.">;,~~-
APPROXIMATE PCE/TC-E:.
' GROUNDWATER PLUMEi ! NORTH BEL?vfONT RD SI°T'E
l\'O.RTH BELMONT, NC:
i MAY 2/3 JUNE 13, 1991
·' US EPA ENVIRONMENTAL P.ESPONSE TEAM
RC:.PDNIC .:maNCCIUNCi Nltl ,,,.,.,._ Tllt"1. CON'JR,t,CT V.tU ;t~~;~-!~:4◄-,• •
STREET -···---
~~; 1::, i.:' ·. :f~~;~ ,: ·: ; : ?-.ef::/_ '
Ill \ , ·,
\ R'.>P(FtS n /g~tiltf~-~.':, .'' ~Ft.Y WltL-Ar~ ~o\-~~ ,;c;/ . ,"-
' ~ . ·.,;/ .. \1AHAFrCY-wn~:8f 7 \~'
• ~~-:,,4
• c:.,,..,,:o•:.
\ \ \ \,-
·' :PIRIT CI-IUltCK.,.-•.
lllr \\, ·\\. . .·' ~".-'> .. sc"oo, / ,001,1/ '·\·· .. , . ./. · /~sc~'/ .
_.,.-·S?,.c\\... ,. .._\. .\
rt: \ ~.::. · · ct.-:· \ ·. Ii .---\ \· •. -_>,,/ ///✓-✓-\
I
I
: ... = TRAiLERS
-:~ .; r::t::.[ . - . . ~ t-.c-,:•-,; ___ :_. · __ s_rR_"-"-----~-;"';'-r_-~•:C.i'.·'.c.·>_'~'-.~;.;.-·'.·;_1:C.'"_..:..__..., .,
! <.
~~,.::-,,_;~;~i==••_'ruc:c•~~:t '
a,
... -. ~ -. .. ,._ ._
---~
' " \
~
Ii ,
~ .
.
. '.
.
·:
C
~ta.WI II
c I
-• •
-•
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1 1
~ .
~ • t.. -
C -J
0
~ • 0 > • 1
Wg . .,.
>
~ ..
0
• .. c::
~
ff
~ ..
..
..
C
FIGURE 4
NW -SE CROSS SECTION
NORTH BELMONT ROAD SITE NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
NORTH BELMONT SIJE NW -SE Crooo Sec:~1on
CCC .. , "
Overlying ..
Sediments ..
.. .. .. .. ..
Saprolite ·• ..
. ---......_ .. "'--"\ ..
\ ii
Unweathere.£\ ... ..,
Bedrock -..... -------\ Fracture •• Zone 1t Horizon
-a, ... \ .,. ... \ "' ... ... ..
i"-.., ...
' APPARENT " . PCE/TCE PLUME '--'-../
CCC
.l.000
in/IHI
ll C
.. • ..
·• •
1
1 .. .;.
C 1 JJ ii • • -0 .. " • < .. • • ,., -.. • < .!. 0 -a 8 :'
0 ... J
-.., ...
" ..
-<J ·-
~
-,,
ff .,, ~
~ C ... .. \ -DI ..
/ ... ..
.l.000
I
111
11
11
·-••
11
·-I. ·-;11
' l: '.I' 1P ,.,
Ii
l 11 .,
~ Ii
•i ~: Ii
11f
\'
I };_-·
" '(o,
JI: 1:· }": .
. ,
Depth &mo Ao,
lf..-tl lcanh/1111
JZ.5 IS 37.5
D
-10
·Z0
-JD
-,o
-5D
.. o
-10
-i!D
-'l0
-10D
-uo
-JZ0
-13
-110
-J5D
-1'0
-no
-JBD
FIGURE 5
GEOPHYSICAL LOGS FOR THE
SHOPPING CENTER WELL
NORTH BELMONT ROAD SITE
NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
llel1
Ccnstru:t ion
ta,clctivity
(,Bin)
5 J5 15
~ivity ~4 ~l•l in ~
port it di.a TD ~TNI COii,.
I I :
11'111
rr
IN/
lfl'"I LitloloOI'
D .:ll
Littologic
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FIGURE 5 CON'T.
GEOPHYSICAL LOGS FOR THE SHOPPING CENTER WELL
NORTH BELMONT ROAD SITE NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
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FIGURE 6 GEOPHYSICAL LOGS, WELL CONSTUCTION AND LITHOLOGIC DESCRIPTION FOR MW-2 NORTH BELMONT ROAD SITE, ·NORTH BELMONT, NC
'IS
MAY 28 JUNE 13, 1991
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FIGURE T
GEOPHYSICAL LOG AND
LITHOLOGIC DESCRIPTION FOR MW-1
NORTH BELMONT ROAD SITE
NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
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FIGUR.E":a
GEOPHYSICAL.· LOG FOR
THE MAHAFFEY WELL B NORTH BELMONT ROAD SITE NORTH BELMONT, NC
MAY 28 -JUNE 13, 1991
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FIGURE 9 GEOPHYSICAL LOG FOR THE SCHOOL WELL NORTH BELMONT ROAD SITE NORTH BELMONT, NC MAY 28 -JUNE 13, 1991
W.11
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FIGURE 10 GEOPHYSICAL LOGS, WELL CONSTRUCTION AND LITHOLOGIC DESCRIPTIC~ FOR MW-5 NORTH BELMONT ROAD SITE · NORTH BELMONT, NC MAY 28 -JUNE 13, 1991'
11'111 llell Ccnd.ct j ., j ty Ir
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Q~servation
• II
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In coo;:ieration wilh REF. 13
l✓orth Carolina
Oepartm8nt of l✓atura:
Resources arid
Communily Development.
North Carolina
Agricultural Research
Service, North Carolina
Agricultural Extension
Service, Gaston County
Board of Commissioners,
and Gaston Soil and
Water Conservation
District
Soil Survey of
Gaston County,
North Carolina
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Gaston County, North Carolina
land makes up 25 to 50 percent. The areas are'oblong,
are irregular in widlh, and range from 4 lo 20 acres,
Typically, this Cecil soil has a yellowish red sandy
clay loam surface layer that is about 6 inches thick, The
subsoil extends to a depth of about 58 inches, It is red
clay in the upper part and red clay loam in the lower
part The underlying material to a depth of 80 inches is
red saprolite that has a loam texture.
This Cecil soil has moderate permeability, and the
shrink-swell potential is low, The water table is not
within a depth of 6 feet. Depth to bedrock is more than
6 feet. The surface layer is medium acid to very
slrongly acid unless lime has been added, The subsoil
is strongly acid or very strongly acid, The hazard of
erosion is severe in bare, unprotected areas,
Areas of Urban land are covered with buildings,
streets, driveways, and parking lots,
Included in mapping are small areas of Gaston,
Tatum, and Wedowee soils. Gaston soils are dominant
around Mount Holly and Belmont. Tatum soils are
dominant around Bessemer City and Kings Mountain,
Wedowee soils have a thinner subsoil and a moderate
shrink-swell potential and occur at random within the
map unit. Also included are small cut and fill areas
where the natural soils have been altered or covered
and the slope modified, These areas are commonly
adjacent to the Urban land, The inclusions make up 1 0
to 25 percent of this,map unit.,
Steepness of slope is the main limitation for building
site and recreational development. The hazard of
erosion is severe where vegetation is removed at
construction sites, and erosion control practices are
needed, Onsite investigation is needed before planning
the use and management ,of specific sites, Moderate
permeability and steepness of slope are the main
limitations for septic tank absorption fields,
This Cecil-Urban land complex has not been
assigned a capability subclass nor a woodland
ordination symbol.
CH-Chewacla loam, frequently flooded. This soil
is nearly level and is somewhat poorly drained, It i~ on
flood plains along creeks and rivers throughout the
county, Some of the larger areas are along Catawba
Creek, Long Creek, and the South Fork Catawba River,
In mapping, the number of observations was fewer than
in other areas because of flooding and dense
vegetation, but the detail is adequate for the expected
use of the soil. The areas are long, are irregular in
width, and range from 5 to more than 150 acres.
Typically, this soil has a brown loam surface layer
that is about 6 inches thick, The subsoil extends to a
19
depth of about 45 inches. It is yellowish brown fine
sandy loam and loam in \he upper par\, brown clay
loam in the middle part, and grayish brown sandy, clay
loam in the lower part. The underlying material to a
depth of 60 inches is dark gray and light brownis~ gray
sandy clay loam,
Permeability is moderate, and the shrink-swell
potential is low, The seasonal high water table is within
1,5 feet of \he surface, and this soil is subject to
frequent flooding for brief periods mostly during the
winter and spring, Depth to bedrock is more lhan 5 feet.
The soil ranges from very strongly acid to slightly acid
unless lime has been added,
Included with this soil in mapping are small areas of
Congaree and Worsham soils, The Congaree soils, in
slightly higher places closer to stream channels, are
well drained, The Worsham soils are poorly drained and
clayey. They are at the base of upland slopes and
along the smaller intermittent drainageways, Also
included are some small areas of poorly drained ,loamy
soils in depressions, The ,included s,oils make up 1 Oto
25 percent of this map unit.
This Chewacla soil is used mainly as woodland, The
rest is u,sed mainly as cropland or pasture,
Where this soil is used as woodland, common trees
are loblolly pine, yellow poplar, American sycamore,
sweetgum, water oak, blackgum, green ash, and
eastern cottonwood, Common understory plants are
flowering dogwood, willow, sourwood, American holly,
arrowhead, and poison ivy. Wetness is the main
limitation for woodland use and management.
Where this soil is cultivated, the main crops are corn,
soybeans, and small grains, Wetness and the hazard of
flooding are the main limitations, Crops are subject to
damage if they are not protected from flooding, Tall
fescue and ladino clover are the main forage plants
where this soil is used for pasture, Drainage and flood
prevention are needed, but the drainage systems are
limited because of a lack of suitable outlets,
This soil generally is not used for building sites,
sanitary facilities, and recreational development
because of wetness and flooding,
This Chewacla soil is in capability subclass IVw, The
woodland ordination symbol is 9W for sweetgum,
Co-Congaree loam, occasionally flooded. This soil
is well drained or moderately well drained, It is in nearly
level areas on flood plains along creeks and rivers
throughout the county, Some of the larger areas are
along Catawba Creek, Long Creek, and the South' Fork
Catawba River, The areas are long, are irregular in
width, and range from 5 to 75 acre's,
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'~ -' l ". ~
MEMORANDUM
TO: File
FROM: G.Doug RumforA ~
Hydrogeologist ZJ!1/
NC Superfund Section
DATE: 4/1/99
SUBJECT: North Belmont PCE Site
North Belmont, Gaston County, NC
NCD 986 187 128
Ref. 14
Selected Residential Drinking Water Well Information
Residential groundwater use population for the wells used in the HRS Documentation
Package (Hughes, Huffman, N.Belmont Elementary, Mahaffy) was obtained from References 28
(Holly Spires, 12/12/91) & 33 (G.Doug Rumford, 7/8/93) of the July 1993 Site Inspection
Report. These wells were taken out of service in 1991 due to elevated levels of PCE, TCE, and
cis-l,2DCE. The groundwater use population for each well is as of the time they were taken out
of service. References 28 & 33 of the July 1993 Site Inspection Report are included as
. attachments to this memorandum.
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To:
From:
Re:
Phone:
December 12, 1991
File
Holly Spires
North Belmont PCE site NCO 986 187 128
Population at North Belmont Elementary School
704-827-4043
Contact: David Starett
David Starett, Principal at North Belmont Elementary
School told me there were 596 kids at the school. The school
borders the property of the old dry cleaner. The school is fenced
in but the property is not.
..
/
Memorandum
To: File
From: G.Doug Rumford~
Date: 7/8/93
Subject: North Belmont PCE Site NCD 986 187 128 North Belmont, Gaston County, NC Phone Conversation with Doc Thompson
Mr. Doc · Thompson of the Gaston County Heal th Dept. was contacted on this day. According to Mr. Thompson, the concrete pad behind the dry cleaning facility at Roper's Shopping Center on Woodlawn Ave. was used to support a boiler .of some kind (Doc did not know). The boiler was reportedly used to "distill" waste dry cleaning solvents. The residual wastes from this process were then dumped on the ground near the boiler pad.
Mr. Thompson also verified that the Wallace & Siler residences were connected to the N. Belmont Elem. School well. He told me that during the February 1991 sampling event, he sampled the well water from the storage tank at the school first. He then sampled the water at the Wallace & Siler residences from an outside faucette at. each of the houses. Mr. Thompson could not explain the disparity in constituent concentrations between the 3 .sample results. Mr. Thompson also gave me the number of residents per household where elevated levels of site contaminants were detected:
E.Hughes -

2

B.Wallace -

3

M.Siler -

1

B.Huffman -

1

C.Clark -

4

R.Jordan -

3

B.Cagle -

1

R.Kunzman -

3

M.Decker -

s

J.Galloway -

3

F.Conner -

3

B.Griffin -

3

D.Mahaffey -

2

F.Parker -

2

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REF. 15
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EXECUTIVE SUMMARY
The North Belmont PCE Site is a former dry cleaning store in North Belmont,
Gaston County, North Carolina, which has contaminated the dominant aquifer in the
vicinity. A dry cleaning store that operated at the site from 1960 to 1975 is suspected of
be_ing the source of contamination. Organic solvents typical of those used in dry cleaning ·
operations were detected in on-site monitoring wells and off-site residential production
wells.
. Sampling results confirm that there is an observed release of tetrachloroethylene,
trichloroethylene, and cis 1,2-dichloroethylene (PCE,TCE,DCE) to the groundwater at the
site. A plume of contaminated groundwater has been detected migrating to the east, away
from the former dry cleaning store. Twelve residential wells and one community well have
been impacted by PCE, TCE, & DCE contamination. The impacted wells have been taken
out of service and the residences connected to city supplied water. However, seven home
owners with wells that have not been impacted chose not to connect to the city water
system. These residents continue to use groundwater. The City of Belmont directed the
abandonment of most of the impacted wells that were taken out of service. Twelve wells
were not abandoned so that they may be used for groundwater monitoring purposes.
The exact source of the contaminated groundwater plume was not identified during
the Site Investigation. The plume is migrating away from the site and may potentially affect
residential wells not identified during this investigation. The compounds detected in the
groundwater plume are potential human carcinogens. Given these potential site hazards,
the NC Superfund Section recommends that an Expanded Site Inspection be conducted.
A high priority for investigation should be assigned due to the fact that residents near the
site continue to use groundwater.
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I TABLE OF CONTENTS
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I 1.
Executive Summary
Intorduction .............................................. 1 .
I 2. Site Description ........................................... 1
I 3.
4.
Waste Source Sampling ..................................... 3
Ground Water Pathway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
I 5. Surface Water Pathway .................................... 11
I 6.
7.
Soil Exposure and Air Pathways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Summary and Conclusions .................................. 14
I PHOTODOCUMENTATION LOG
I APPENDIX
REFERENCES
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LIST OF TABLES AND FIGURES
TABLE 1 North Belmont PCE Site Well Sampling Locations . . . . . . . . . . . 4,5
TABLE 2 Sample Collection ..................................... 7
FIGURE 1 Site Map of North Belmont PCE Site ..................... 15
FIGURE 2 Base Map and Sample Locations ......................... 16
FIGURE 3 Site and Public Well Locations . . . . . . . . . . . . . . . . . . . . . . . . . 17
FIGURE 4 Surface Water Pathway ............................... 18
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1.0 INTRODUCTION
Under authority of the Comprehensive Environmental Response, Compensation, and
Liability Act of 1980 (CERCLA) and the Superfund Amendments and Reauthorization Act
of 1986 (SARA), the North Carolina Superfund Section conducted a Site Inspection (SI) at
the North Belmont PCE Site (NCD 986 187 341) in Gaston County, North Carolina. The
purpose of this investigation was to collect information concerning conditions at the site
sufficient to assess the threat posed to human health and the environment and determine .
the need for additional investigations under CERCLA/SARA or other authority. The scope
of the investigation included reviewing file information, sampling to test preliminary
assessment (PA) hypotheses and document HRS factor values and scores, collecting
additional non-sampling information, and interviewing nearby residents.
2.0 SITE DESCRIPTION
2.1 Location
The site is located in a residential. neighborhood on Woodlawn Avenue in North
Belmont, Gaston County, North Carolina (Figure 1; Ref. 22). The geographic coordinates
of the site are 35° 16' 24.5" North latitude and 81 ° 03' 04.5" West longitude (Ref. 1).
Gaston County is characterized by long hot summers. Winters are cool and fairly
short. Mean annual precipitation is 44 inches with a mean annual evaporation of 41 inches,
yielding a net annual precipitation of 3 inches (Ref. 2). The two-year 24 hour rainfall is 3.5
inches (Ref. 3).
The elevation of the site is approximately 760 feet above Mean Sea Level (MSL).
The surrounding areas range in elevation from 600 to 800 feet MSL within a 1-rnile radius
of the site.
2.2 Site Description
The site consists of 25 single family dwellings, a church, and an elementary school
whose wells have been contaminated with tetrachloroethylene (PCE). The source of the
groundwater contamination is believed to be the former Untz Dry Cleaners on Woodlawn
Avenue. The former dry cleaning shop is part of a shopping complex called Roper's
Shopping Center (Ref. 4; Fig. 2). This center includes Roper's Furniture Store, the Bingo
Barn, and the Adventure In Faith Church (Ref. 4 ). There is a flea market held on the lawn
between the shopping center and the elementary school every Wednesday through Sunday.
The site terrain is relatively flat with a gentle slope toward the northeast to an unnamed
tributary of Fites Creek (Ref. 22). In back of the shopping center there are two mobile
homes, both are occupi!!d by one tenant each.
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The Untz Dry Cleaner's boiler was located behind the store on a concrete pad.
There is a buried septic tank behind the shopping center building, near the mobile homes
(Ref. 4). The total area of the former Untz Dry Cleaning facility is approximately 0.75 acre
(Ref. 32). The site is surrounded to the east, west, and south by private residences (Ref.
5). Adjacent to the site, and to the south, is the North Belmont Elementary School (Ref.
4). The site is bounded to the north and south by a chain link fence (Photos 6-21).
2.3 Operational History and Waste Characteristics
The North Belmont PCE site was owned and operated by the Untz family from 1960
until 1975 as a dry cleaning establishment (Refs. 6, 7). The boiler located behind the
building was used to "distill" waste dry cleaning solvents (Ref. 33). Speculation is that the
operation openly disposed of spent solvent residue onto the ground surface behind the
building and spent solvents through the on-site septic tank system (Refs. 4; 6; 33). This
speculation is supported by evidence of a ground water contamination plume emanating
from the area of the former dry cleaning store (Ref. 7). The groundwater plume extends
east of the former dry cleaner and north of North Belmont Elementary School (Ref.7, Pgs.
13, 30).
In February 1991, the Gaston County Health Department sampled the well that
provided water to the North Belmont Elementary School and two single family dwellings
(Ref. 8). This sampling was associated with an effort by the county to evaluate community
water supplies for volatile organic compound (VOC) contamination. The results of this
sampling indicated significant VOC contamination in the well water. The US EPA Region
IV Emergency Response and Removal Branch (ERRB) was notified of this situation
February 28, 1991 (Ref. 8). On the following day ERRB mobilized. to the site for the
purpose of collecting additional potable water samples. Approximately 25 drinking water
samples were collected by the ERRB and Gaston County Health Department (Ref. 8).
Perchloroethylene (PCE) and/or its breakdown products, trichloroethylene (TCE) and cis
1-2, dichloroethylene (DCE), were detected in sixteen samples. PCE concentrations
measured as high as 15,000 parts per billion (ppb) (Refs. 8; 9). The more highly
contaminated wells are listed below:
Quantities and Types of Substances Present (PPB)
Well ID . PCE TCE DCE
Hughes 15,000 194 664
Mahaffey 4,500 180 560
Elementary School 570 78 129
Siler 865 51 111
Wallace . 1,093 59 120
Kunzman 91 16 89
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The Gaston County Health Department took immediate steps to protect the school
children by connecting the school to the City of Belmont water system (Ref. 8). Emergency
measures were taken under the authority of the U.S. EPA On-Scene Coordinator (OSC) in
order to protect the health of affected residents (Refs. 10; 11). Removal action levels were
exceeded at five residences with four of these levels being so high that Agency for Toxic
Substances and Disease Registry (ATSDR) recommended that all exposure to the
contaminated water be eliminated (Ref. 10). Therefore, these 5 wells were disconnected
and 500 gallon temporary water tanks were connected to the household plumbing at the
Wallace, Siler, Hughes and Mahaffey residences. Bottled water delivery was set up for the
fifth resident (Refs. 8; 10). These temporary water supplies have since been replaced with
city water connections (Ref. 12).
Nineteen of the neighborhood drinking water wells have been taken out of service
and subsequently abandoned by grouting them to the surface (Refs. 9; 12). Ten residential
sites and the school site have been connected to city supplied water while their wells may
be utilized for groundwater monitoring. Seven residences in the neighborhood chose to
continue to use their wells and not connect to city water (Fig. 3). Wells still in use in the
vicinity of the site will be sampled by the Gaston County Health Department (Ref. 37). All
information regarding wells in the neighborhood is summarized in Table 1.
One bedrock and four overburden monitoring wells were installed at the site under
the direction of the EPA-OSC. The bedrock well (MW-3) was drilled to a final depth of
150 feet below ground surface (BGS). Four monitoring wells were drilled and screened in
the overlying sediments and saprolite (MW-1, MW-2, MW-4, MW-5). The depths of these
wells ranged from 79 to 113 feet BOS (Ref. 7, Pgs. 8, 9). Soil headspace readings from the
MW-1 borehole indicated PCE levels of 469 ppb at 10-12 feet BGS, decreasing to 209 ppb
at 70-72 feet BGS. Unknown constituents were detected in soil headspace samples from the
MW-2 and MW-5 boreholes at levels as high as 68464 ppb and 3113 ppb respectively (Ref.
7, Pgs. 11, 12).
3.0 WASTE SOURCE SAMPLING
3.1 Sampling Locations
Table 2 presents sample numbers, locations, and objectives for all samples collected
during the SI. Eight source samples and two background samples were collected at the site
(Ref. 4).
3
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Table 1. North Belmont PCE Site (NCO 986 187 128) Well Sampling Locations
Sample Location Source Population PCE TCE DCE Abandoned City Water
(ppb) (ppb) (ppb)
N.8. School well 596 570 78 129 N y
8.Wallace school well 3 1093 59 120 N y
M.Siler school well 1 865 51 111 N y
E.Hughes well 2 15000 194 664 N y
B.Huffman well 1 36 1.8 4.4 y y
Shop Ctr Well well 1 1 1
C. Clark well 4 12 7.8 41.7 y y
Toomeys MHP comm. well 51 1 1 1 N N
Rhynes Apt. comm. well 54 1 1 1 N N
A.Jordan well 3 11.5 6.2 28.7 y ·Y
B.Cagle well 1 20.8 8.6 66 N y
A.Kunzman well 3 164.5 39.9 126.9 N y
M.Decker well 5 80.5 7.9 20.2 N y
J.Galloway well .3 3.7 <1 <1 y y
H.VanDyke well 1 1 1 y y
A.Canipe well 1 1 1 N N
F.Conner well 3 1 1 1 N N
Griffin Rental well 36.7 1.9 4.1 N y
B.Griffin well 3 10 nd 1.4 N y
D.Keeter well nd nd nd y y
J.C.Deese well nd nd nd y y
M.Messer well nd nd nd y y
- -- -- ---1-,---- ----- -
Table 1. North Belmont PCE Site (NCO 986 187 128) Well Sampling Locations. cont.
Sample Location Source Population PCE TCE DCE Abandoned City Water
(ppb) (ppb) (ppb)
F.Parker well 2 1.8 <1 1 y y
D.Mahaffey well 2 4500 180 560 N y
B.Russell well nd nd nd N y
J.Collette well nd nd nd N N
P.Solomon well nd 0.6 0,8
J. D. Sherri II well nd nd nd y y
Church Annex well nd nd nd N N
J.Jordan/Leatherman well 0.64 nd nd y y
B.Payseur well nd nd nd N N
D.Fujiko/Clanton well nd nd nd N N
Connor Rental well N N
M.Gaddis well N y
J.Moore well N y
A.Woodward well N y
A.Crews well y y
H.Presley well y y
L.Cornel well y y
J. D. Leatherman well y y
E.Hambrick well y y
C.Byrum well y y
J.A. Van Dyke well y y
B.Sherrill well y y
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3.2
Two background samples from the elementary school property, one surface and one
subsurface sample.
Two from the suspected septic tank area, a potential source area, one surface and
one subsurface sample.
One subsurface sample from the area outside the side door to the cleaners.
Three from the drainage spillway area, one surface and two subsurface samples.
Two from the area of monitoring well MW-1, one surface and one subsurface
sample.
Analytical Results
Soil sampling locations are illustrated on Figure 2. Soil samples S-8, and S-9
exhibited the greatest amount of contamination found at the site. Laboratory results showed
soil contamination from acetone in sample S-8 (1212 ppb) and in sample S-9 (150 ppb) (Ref.
13). No other source samples were found to contain hazardous constituents. Due to the
length of time that has elapsed since the dry cleaners closed, any PCE dumped on the
surface may have evaporated, runoff, or leached into the groundwater. This is the result of
the moderately high soil mobility of PCE (Ref. 30).
The background soil sample (S-1 ), collected from the school yard, exhibited
uncharacteristically high levels (118,000 ppb) of the pesticide chlordane (Ref. 13). Dr.
Luanne Williams, Toxicologist with the Environmental Epidemiology Section, was notified
and a health risk evaluation was requested. Under the direction of Dr. Williams, the
Gaston County Health Department collected 23 soil samples from the North Belmont
Elementary School property for chlordane analysis (Ref. 34 ). In order to protect the health
of the school children, access to the area of the school grounds in question was restricted.
Sampling results indicated elevated levels of chlordane (5400 ppb) in only one of the
samples (Ref. 34). This sample was collected from the same location as the June 2, 1992
soil sample collected by NC Superfund Section personnel. Dr. Williams concluded that
continued exposure to this level of chlordane in the soil around the school did not pose an
unacceptable health risk (Ref. 34 ).
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Sample
Number
SW-1
SW-2
SD-1
SD-2
S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
Sample
Type
Aqueous
Aqueous
Sediment
Sediment
Background
Background
Surficial
Soil
Subsurface
Soil
Surficial
Soil
Subsurface
Soil
Subsurface
Soil
Surficial
Soil
Subsurface
Soil
Subsurface
Soil
Table 2
SAMPLE COLLECTION
Location
Sample collected upstream of site from unnamed
tributary for background
comparison
Sample collected downstream of site from unnamed
tributary at Acme .Rd. bridge
Sample collected from same location as SW-1
Sample collected from same location as SW-2
Sample collected on school property near northern
boundary with Roper property : 0-2' depth
Sample collected from same location as S-1 : 6'
depth
Sample collected approx. 15' from suspected
location of septic tank : 0-2' depth
Sample collected from same location as S-3 : 6-7'
depth
Sample collected from bottom of site drainage
spillway : 0-2' depth
Sample collected from same location as S-5 : 5-6'
depth
Sample collected from same location as S-5 : 10-11'
depth
Sam pie collected near monitor well MW-1,
upgradient of the well : 0-2' depth
Sample collected from same location as S-8 : 5-6'
depth
Sam pie collcctei.I near side entrance of dry cleaning
store : 4' depth
7
Date Time
6/2/92 1150
6/2/92 1300
6/2/92 1155
6/2/92 1300
6/2/92 1430
6/2/92 · 1450 _
6/2/92 1520
6/2/92 1540
6/2/92 1550
6/2/92 1605
6/2/92 1625
6/2/92 1700
6/2/92 1720
6/2/92 1800
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3.3 Conclusions
Results of the source sampling and analysis at the site did not reveal the source of
the PCE, TCE, and DCE contamination. The investigation of surface soils for an indication
of dumping of characteristic dry cleaning wastes has proved inconclusive. However, due to
the length of time that has passed since the dry cleaner ceased operations and the rapid
mobility of PCE in soil, any dry cleaning wastes dumped on the ground may have
evaporated, runoff, or leached into the groundwater. Investigation of the suspected septic
tank was also inconclusive, however, the exact location of the septic tank could not be
verified. Although there is no evidence of waste material having been dumped into the
septic system, this is still a likely scenario. Hazardous waste quantity may be approximated
by the once-filled volume of the septic tank which was 1500-2000 gallons (Ref. 14).
GROUND WATER PATHWAY
4.1 Hydrogeologic Setting
Gaston County is in the central portion of the Piedmont Physiographic Province. The
site and surrounding area is underlain by metamorphosed intrusive rocks of the Charlotte
Belt. Geologically, this area is characterized by a composite rock in which diorite and
granite appear as intermixed bodies occurring in a general north-south belt along the eastern
border of the county. This belt extends eastward into Mecklenburg County where it is of
greater prominence. South of Mt. Holly, the amount of granite appears to be subordinate
to diorite (Ref. 15, p.4 7). ·
The stratigraphy at the site is made up of 30 feet of surficial sediments consisting of
a red clay grading to a red clay loam overlying 60 to 80 feet of saprolite (Refs. 7, Pg. 31; 35,
Pg. 19). Hydraulic conductivity of the surficial sediments is 1 x 10-11 as compared with 1 x
10-6 for saprolite (Refs. 16, Pg. 19; 36, Pg. 51601). Beneath the saprolite lies the fractured
bedrock (Ref. 7, Pg. 31).
Because of its larger porosity, the saprolite functions as a reservoir for recharge to
the fractured bedrock below. The fractures serve as an intricate interconnected network of
pipelines that transmit water either to springs or streams or to wells (Ref. 16,p.46). Ground
water levels from site monitoring wells completed in the saprolite range from 26 to 37 feet
below land surface (Ref. 7, Pg. 19). · ·
A ground water high exists in the vicinity of Roper's Shopping Center where the
abandoned dry cleaning establishment was formerly located. From the suspected source of
contamination, water table contours slope away from the ground water high toward the
northeastern intermittent stream (Ref. 7, Pg. 7).
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4.2 Ground Water Targets
A majority of the people in the vicinity of the site have access to city water. Those
who do not, rely on private or community wells (Refs. 17; 18; 19). The City of Belmont
purchases water for distribution to residents from the Belmont Converting Company. The
surrounding municipalities are served by surface water sources that will not be affected by
groundwater conditions at the site (Ref. 19; Figure 1). The nearest private well, the Parker
well, is located approximately 200 feet from the suspected source area (Ref. 7, Pg. 30). The
nearest community well, approximately 250 feet from the site, is located at North Belmont
Elementary School. There are 22 community wells located within a four mile radius of the
site. These community wells account for 3498 groundwater users within the target distance
limit (Ref. 17). The total population using ground water within a four mile radius is 8376
(Refs. 20; 21). The total groundwater population per distance ring is summarized in the
table below:
Distance from site (mi.) G.W. Population
0 -1/4 , 66*
1/4 -1/2 770
1/2 - 1 398
1 - 2 2714
2 - 3 1687
3-4 2741
• Includes 35 groundwater users affected by conditions at the site.
4.3 Sample Locations
Contamination found in the North Belmont Elementary School well lead the Gaston
County Health Department and the US EPA to sample the 25 nearby residential wells and
5 community wells for PCE and its degradation products TCE & DCE (Refs. 8, Pg. 2; 9).
Figure 3 illustrates the location of sampling points in the vicinity of the site. In addition,
groundwater monitoring wells were installed at the site under the direction of the EPA-OSC
and sampled by Roy F. Weston Inc. (Ref. 7; Figure 2). North Carolina Superfund Section
personnel did not collect groundwater samples during the site investigation due to the
amount of sampling al"eady done.
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4.4 Analytical Results
As of June 1991, there were fifteen wells· showing elevated levels of hazardous
constituents. Six of the samples exceeded the removal action level for PCE (Ref. 8; 9). The
results of the sampling effort by Gaston County and the EPA Emergency Response and
Removal Branch. are summarized in a table in Reference 9. The highest contaminant
concentrations were found in the Hughes residence well sample where PCE, TCE, and DCE
were detected levels of 15000 ppb, 194 ppb, and 664 ppb respectively. Within this area of
sampling, a contaminated groundwater plume was delineated (Ref. 7, Pg. 30).
A groundwater sample from monitoring well MW-1 had the highest concentrations
of target compounds, relative to the other monitoring wells. Concentrations of 14 ppb for
DCE, 7 ppb for TCE and 148 ppb for PCE were reported (Ref. 7, Table 4). Monitoring
well MW-3 contained PCE at levels of 8.7 ppb and an estimated 3.5 ppb for DCE. Three
other contaminants were detected in the sample from well MW-5; a concentration of 13 ppb
for 1,4-dichlorobenzene, 14 ppb for acetone and an estimated 1.9 ppb for toluene (Ref.7,
Pg. 22).
4.5 Conclusions
The EPA-ERRB and the Gaston County Health Department sampled approximately
25 private wells after groundwater contamination was detected in the North Belmont
Elementary School well in 1991. Under direction of the EPA-OSC, McCall Brothers
Drilling Co. installed 5 groundwater monitoring wells around the former dry cleaners facility
at Roper's Shopping Center. These 5 monitoring wells were sampled as part of the
Preliminary Investigation performed by Roy F. Weston Inc. for the EPA A detectable
groundwater contamination plume has migrated away from the site toward the northeast.
This is evidenced by the lack of hazardous constituents present in the background aqueous
sample collected from monitoring well MW-4. Private wells have been abandoned and
residences have been connected to city water. There is no readily definable source to this
plume but contamination has been found in high concentrations leading away from the dry
cleaning operation.
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SURFACE WATER PATHWAY
5.1 Hydrogeologic Setting
Overland runoff will drain from the site to an intermittent creek approximately 1000
feet north. (Figure 1). The intermittent creek flows approximately .5 miles east to the
probable point of entry (PPE) on an unnamed perennial stream. The unnamed stream
continues approximately .75 mile to the confluence with Fites Creek. From here, the
surface water pathway continues along Fites Creek approximately 1.5 miles east to its mouth
at the Catawba River. From this point the surface water pathway continues 12.75 miles
. along the Catawba River into Lake Wylie where the 15-mile surface water pathway ends
(Ref. 22; Figure 4).
Flow rates in Fites Creek, at its mouth near Catawba Heights, were calculated to be
4.6 cubic feet per second (cfs). The average flow rate along the Catawba River at US 85
near Belmont is 2109 cfs (Refs. 23; 24; 25).
5.2 Surface Water Targets
There is one surface water intake within the fifteen mile surface water pathway
downstream from the site. This is the Belmont Converting Company (BCC) surface water
intake located approximately 5 miles downstream of the site on the Catawba River (Refs.18;
19; Figures 1; 4). Approximately 10200 residents of Belmont and North Belmont rely on
this water supply for domestic and commercial purposes. There are no other surface water
intakes located along the site surface water pathway (Ref. 19).
Numerous wetlands have been identified within 15 miles downstream miles of the
site. Total wetland frontage was calculated to be 6.25 miles along the surface water
pathway. The nearest wetland (approximately 5.5 acres, 0.25 mile frontage) is located on
Fites Creek, approximately 1.5 miles downstream from the site PPE (Ref. 26; Figure 4).
There are no state or federal endangered or threatened animals or plants along the fifteen
mile surface water pathway (Ref. 27). Fites Creek and the Catawba River have been
classified as suitable for aquatic life propagation and fishing usage. The unnamed tributary
to Fites Creek is not utilized for fishing purposes (Refs. 31; 37).
5.3 Sample Locations
Two water and two sediment samples were collected along the intermittent creek to
evaluate the surface water pathway (Ref.4; Photos). No samples were collected from the
unnamed tributary, Fites Creek, or at the BCC surface water intake due to their distance
from the site. Sample codes, descriptions and rationale for the surface water and sediment
samples are presented in Table 1 and sample locations are shown in Figures 1 & 4.
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5.4
One sediment and one surface water sample from upstream of the site
drainage to the intermittent creek (SW-1, SD-1).
One sediment and one surface water sample from near the bridge on Acme
Road approximately 1200 feet downstream of the site drainage to the
intermittent creek (SW-2, SD-2).
Analytical Results
The downstream surface water sample collected near the bridge on Acme Road
(SW-2) contained two hazardous substances; 1,1,1 trichloroethane and tetrachloroethene
were detected at concentrations of 11 ppb and 5 ppb ( estimated) respectively. The
upstream background sediment sample (SD-1) contained 103 ppb acetone (Ref. 13;
Appendix A).
5.5 Conclusions
Sediment and surface water sample results were inconclusive in determining a release
of site specific hazardous materials to the surface water pathway. The samples indicate
concentrations elevated above background levels for 1, 1, 1-trichloroethane and estimated
concentrations of tetrachloroethene in the downstream water sample.
Acetone was found in the upstream sediment but not in the downstream segment.
This contamination may be migrating downstream from another possible source. Neither
acetone nor 1,1,1-trichloroethane were associated with or detected at the site.
SOIL EXPOSURE AND AIR PATHWAYS
6.1 Physical Conditions
The site, in the area of suspected contamination, is soil and grass covered. Small
piles of what was assumed to be household trash were observed in this area. The areas of
concern consist of a 7 by 12 foot pad where the dry cleaner boiler was placed and the area
in the vicinity of the site septic tank. The area of suspected solvent residue dumping near
the boiler pad at the rear of the building is also soil covered (Ref. 4; Photos 1, 13-16).
6.2 Soil and Air Targets
There are 2 workers onsite during normal operating hours. There are 2 mobile
homes behind the shopping complex with 1 resident in each (Ref. 14). Within 300 feet of
the site, 596 children. attend school at North Belmont Elementary School (Ref. 28).
Approximately 1003 people reside or attend school within the 1/4 mile radius around the
site (Refs. 20; 28).
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The cumulative population within the four mile radius is approximately 37,869 (Ref.
20). There is one sensitive environment (Rankin Forest) located within the three to four
mile radius north of the site (Refs. 27; 29). The Bigleaf Magnolia (Magnolia macrophylla)
grows within the Rankin Forest and is ranked as significantly rare by the State. To date,
no air releases have been measured or suspected at the site. The nearest wetlands are
found along Fites Creek, approximately 2 miles from the site (Ref. 26).
6.3 Soil Sample Locations
Ten soil samples were collected at the site in order to evaluate surface and
subsurface soil conditions. Background samples were taken at the North Belmont
Elementary School. These samples were taken near the northern boundary of the school
property. The areas of concern included the area behind the dry cleaning store where the
boiler was kept, the approximate area of the septic tank, and the area of ground surface
outside of the store's side entrance. Sample codes, description and rationale are presented
in Table 1 and sample locations are shown in Figure 2. ·
Two background samples from the elementary school property, one surface
and one subsurface sample.
Two from the septic tank area, a possible source area, one surface and one
subsurface sample.
One subsurface sample from the area outside the side door to the cleaners.
Three from the drainage spillway area, one surface and two subsurface ·
samples.
Two from the area of monitoring well MW-1, one surface and one subsurface
sample.
6.4 Soil Analytical Results
The laboratory results show the surface soil sample near the septic tank (S-3) to be
slightly contaminated (estimated 5 ppb) with trichlorofluoromethane. The surface soil
sample taken near MW-1 (S-8) showed 1212 ppb acetone. The subsurface soil sample (S-
9), collected from the same location exhibited 150 ppb acetone. Methylene chloride was
detected in trace amounts in the subsurface soil sample collected from the drainage area
(S-6). The background soil sample S-1 revealed chlordane at a concentration of 118000 ppb.
The other soil samples showed no contamination in the surface or subsurface.
6.5 Air Analytical Results
No formal air monitoring was conducted.
carried on site during· the site inspection. No
detected (Ref. 4).
13
An organic vapor analyzer (OVA) was
measurements above background were
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6.6 Conclusions
The site is located in a mixed use area of North Belmont. There are 2 residents
living onsite and approximately 37,869 live within 4 miles. There was no indication of a
release to the air pathway. No characteristic hazardous dry-cleaning wastes were detected
in soil samples collected at the site. Laboratory results show contamination in soil with
acetone near MW-1. The source of the acetone contamination has not yet been determined.
7.0 SUMMARY AND CONCLUSIONS
The North Belmont PCE SI was conducted to gather the data necessary to evaluate
the need for further remedial action at the site. To accomplish this task, environmental
samples were collected for analysis to characterize the types of substances deposited at the
site and available to potential migration pathways. In addition, information was collected
to confirm target populations and environments potentially at risk from the site.
The Untz Dry Cleaners operated from 1960 to 1975. The operational and waste
disposal practices of this dry cleaning business are not documented. Laboratory results from
samples collected at the North Belmont PCE site have not indicated the source of the
PCE/TCE contamination plume in groundwater. The PCE/TCE plume may be the result
of the introduction of dry cleaning wastes into the septic system, but it may have also been
caused by application to the ground surface. Laboratory results did not reveal dry cleaning
wastes in surficial or subsurface soils at the site. This maybe attributable to the high
mobility of PCE in soil and the length of time since the dry cleaning store has ceased
operations. However, PCE was detected in headspace readings from borehole soil samples
collected during drilling operations. In addition, the location of the septic tank onsite could
not be verified.
Twenty-nine residences and the North Belmont Elementary School have been
connected to city supplied water. Six residences and a church did not connect to the
municipal water system and continue to use private groundwater wells. Based on these
findings, it is recommended that further action be taken under CERCLA or SARA and that
the site be considered for an Expanded Site Inspection (ES!).
14
---- - - -- -- - - --Adapted from Preliminary l!ydrogeological Investigation, North Belmont Road Site: Roy F. Weston.Inc., 1991
!t,rth E~l,•;._if1t fCE Site
NL("th ~tln1Y1t, t(
ifD %, 187 118
t,9,Jr? ?. S~;~ Hop t Sor.pie tocotioos
\
\
0
Shoppog Center Veil
S-to •
•
S-9 • OHV-1
• S-1 S-1
vN-1
0
0 HV-1
S-5
• S-6
S-7
• S-3
S-4
l'oble lllnes
w
Porker
Veil
0
North Belnoot
[tenentary
School
N
E
0
Schoo Veil
0
HV-5
- -
1 . .-
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MEMORANDUM
TO: File
FROM: G.Doug Rumford ~
Hydrogeologist CE/
NC Superfund Section
DATE: 3/30/99
SUBJECT: North Belmont PCE Siie
Ref. 16 -
North Belmont, Gaston County, NC
NCD 986 187 128
1991 USEPA ERRB Residential Drinking Water Sample Data
The laboratory data sheets for the purgeable organic chemical analysis performed on drinking water samples collected at the North Belmont site between the period of 2/27/91 to 3/7/91 were obtained from Ms. Giezelle Bennett, US EPA Region IV Remedial Project Manager for the site. According to the April 16, 1991 Action Memorandum from On-Scene Coordinator (OSC) R. Donald Rigger, Jr., (Ref. 4 of HRS Documentation Package), all samples were collected by USEPA Emergency Response and Removal Branch (ERRB) personnel and submitted to the EPA Region IV laboratory in Athens, Georgia for analysis. Ms. Bennett also told me that no field notes, chain of. custody forms, or quality control (QC) validation package exist for the samples in question. However, all samples would have been collected in accordance with US EPA Region IV environmental investigations standard operating procedures and quality assurance. The laboratory analytical data sheets for the samples collected by the ERRB are included as an attachment to this memorandum.
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:,\ :REb12"1~g:::.· . ·>
NORTH BELMONT PCE SITE .
NORTH BELMONT, GASTON COUNTI, N. CAR()hlt-lMA~ ... {01999:.)··
.. ·ANALYTICAL RESULTS . ·· $0"-.,_.,-<. ,.,.;.::
. , ~i:ni-uNu ·~ECT: · i · .. · .·,,.. . . . .... " . ION·
WELLS SAMPLED BY GASTON COUNTY HEALTH DEPT,·•·. .
·. -. ' SAMPLE NO. . NAME .. ADDRESS .PCE .. ,~TCE , : DCE
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NB-4 MABEL SILER 105 APRICOT ST 865 51 111
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NB-6 SHOP CTR WELL WOODLAWN AVE 1 1 1
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NB-8 TOOMEYS M.H.P. MELODY ST 1 1 1
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NB-11 REBECCA JORDAN 203 GOSHEN AVE 6.3 1.8 18.3
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NB-13 RUTH KUNZMAN 204 GOSHEN AVE 90.8 16.1 88.5
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NB-15 JULIE GALLOWAY 117 MAGNOLIA ST 2.9 1 1.3
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NB-17 ROMAIEM CANIPE 106 APRICOT ST 1 1 1
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WELLS SAMPLED BY REGION IV EPA-TAT
SAMPLE NO. NAME ADDRESS PCE TCE DCE
·.•·•.'·•.'' .... , •. ·.•• .. ••.r.•.•.'.' ... ·.·.N.'.· ... ·····s·······.2ft GRiFFINAENi'AL -' · 11 ·o APR1c.· oi$i:_-,1.· : · . .,:._· _:,'.; __ : o.s · :_ :·.\.'.,· ":h\i ....... : :-:.•.••.'.f.T.J1.h.· .. ···.c1.·.·.·.· .. •·•·f·f. ··•-.::-:-:-:❖;.:-:-:-:{-::-•••• , •• -•• :• :-.-.:.❖:-.w.-.• -:·-··,·. •.. .• . • • -• •. • •. . -· -.. • • ~ ••• •
NB-2 BOB GRIFFIN 121 MAGNOLIA ST 7.7 nd 1.4 -
. ./116 MAGN6Ei:K'sf:\ -:: •,•0 -nd , .·· dlinff @@fiIM!hct':! ,•. ,;.;,•.; ·,.•.•,•.· .. ·,. ·--.·······'·•. · ••.. • ,·/· ..•... w. -•. •,•,•.-..•• ·.·.·.·.··-·-;.;.;-:-:-·-·-:.·-·.-.;.·.,·.•.;.-.•.;.;, , .•;.•.•,;. •, ;-······ .:-;.•,•·•·❖:-:% •/sw•y:::s····•q❖·••:••>""
114 MAGNOLIA ST . nd nd :,, · . :·n.d
J?3M~gfi§b!A~f ·I;;m ;;iidi;\iM Ind(! i;!{/id}
NB-6 F. PARKER 199 GOSHEN AVE 4.4 1 3.7 IiN~±r J; !§/.¥A8!11t§'.(itrlll : EIJ$•te,6$KgNAv.,~;; {iil\l!!A@'./ i@Mc1$0,1!!/imi§6QJ .
NB-8 B. RUSSELL 110 SCHOOL ST nd nd · nd I '.f:/$+~•·•I {iJ/c6[trnE y·· ai1~!l"c~~:R121: ;1:11i:J1;i;!JJ!ra.!:: lr111:ra rn1zii11;;;mnacj
NB-10 P.SOLOMON 113SCHOOLST nd 0.6 0.8
i::r•·•;:NB"-0fi •'}(J'.6:'·sHERRl[[( ? ••'••Ff 101 APFi'lcof§-ry l#hd·:·.: ........ ,,.,Ln. a.·. }··••.··.=•, ;1i:l,;~H.i ······•·····•·····'·:•.•·:••·•·••:w •• ·.·.·-_. •• _. :.;.; .•. ;,;.;;:•.·:·:•:•,.·· .• ·.•, •• : ..• ·.·.: ..•. ;.;,.•%•.❖ll,·.•/:•;;•.·•.·:❖::.-,.; •••••••.••••••
NB-12 CHURCH ANNEX APRICOT/SCHOOL
'i•Ns:'..'i's :oxVi6ciANTON • t• 1•14 $¢8.§§R:$:f ; I s ·••'•• :::•.:-.:·.·.·.-.·.·-· •• • •• :. •.·.· .......... •·-•.;; .......... ~ •• ❖:... • •
NB-14 JUDY JORDAN 203 SCHOOL ST
/Ns:::15 ··• /sEiTiPAYSEUR' \
DCE = cis 1,2 DICHLOROETHYLENE
TCE = TRICHLQROETHYLENE
PCE = TETRACHLOROETHYLENE
nd = not detected
(). 1.,
nd nd nd
· ·. nd ;'.i'.)i; J1H\ W · ,; nd
0.64 nd nd
\•· \. :.•• iid···.· \: \@}
-.•
;·: ;.
··/·r~--/
UNITED STATES ENVIRONMENTAL. PROTEC'!'.ION A<iENCY. .;'.h':d,1 ..
REGION IV
COLLEGE STATION RD.:·.;:-:
ATHENS,. GA .. ·30613 ·;:, ·
*****MEMORANDUM******
DATE:'03/06/91
SUBJECT: Results
91-491
of Purgeable· Organic Analysis;·.
N _BELMONT PCE SITE
. I
<·\:;· ~-......
BELMONT NC ~ 0 91
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FROM: Tom B. Bennett Jr. · ~#
Chief, ·organic' Chemistry Sectiond/,·~ · .,
I
· TO: BILL BO KEY' i,,_.,, .:,,,.a,.: .. •.;,,,,.,,,•,::.,/,. >•,••.'.·'1· .. :.;2:: .. ' ·~ -~:;::.
Attached are the results of analysis of samples collected as part of
the subject project.
If you have any questions please contact me.
ATTACHMENT
I
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I
I
I
I
I
I
PURGEABLE ORGANICS DATA REPORT
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM· EPA-REGION IV ESD .. ATHENS, GA. ... ' ............. . • • • • • • • • • • • • • • • • • •• . PROJECT·NO. 91-491 . SAMPLE •• ··.·SOURCE: . N BELMONT PCE SITE •• STATION ID: TB TRIP'BLANK
NO. 55193 SAMPLE TYPE: BLKWA
•• •••••• . UG/L
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U . sou '· 12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U ·sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U. 5.0U 5.0U
• • • • • • • • • • • • • • • • • .. ANALYTICAL RESULTS
CHLOROME THANE· VINYL CHLORIDE.,,. BROMOMETHANE CHLOROETHANE
• • • • • • • • • • • •
TRICHLOROFLUOROMETHANE . 1 :1-DICHLOROETHENE( 1, 1-DICHLOROETHYLENE) ACETONE . :• . ·· : · · : · CARBON DISULFIDE · METHYLENE 'CHLORIDE·• TRANS-1 .2-DICHLOROETHENE 1 ,1-DICHLOROETHANE VINYL ACETATE . CIS-1,2-DICHLOROETHENE 2,2-DICHLOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1,1.1-TRICHLOROETHANE 1,1-DICHLOROPROPENE
~~~~8~c~[6~~~~~~nJDE.
BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
• • • UG/L
5.0U · -12U 5.0U 5.0U 5.0U 5.0U s.ou . 12U s.ou 5.0U 5.0U s.ou s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
• • • • • • • • • • • • • • • • • COLLECTED BY: B BERGER ST: NC 02/27/91 1635 STOP: 00/00/00
••••••• • • • • • • • • • • • • • • • • ANALYTICAL RESULTS
CIS-1.3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1 ,3-DICHLOROPROPENE 1.1,2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIOROMOCHLOROMETHANE CHLOROBENZENE 1,1.1.2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM · BROMOBENZENE 1.1,2,2-TETRACHLOROETHANE 1,2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1,3-DICHLOROBENZENE 1 ,4-DICHLOROBENZENE 1,2-DICHLOROBENZENE
03/05/91
••••••• .. .. •• ..
• • • • . ..
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-EsrIMATED VALUE •N-PRESUMPTIVE EVIDENCE Of PRESENCE Of MATERIAL •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN·TO BE GREATER THAN VALUE GIVEN .•U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
UNITED STATES ENVIRONMENT.AL
REGION IV
COLLEGE STATION ·RD ..
ATHENS, GA. 30613
*****MEMORANDUM******
DATE:, 03/08/91
SUBJECT: Results
91~491
of Purgeable Organi'c Analysis;·
N BELMONT PCE SITE
BELMONT NC
. ..,
· ?:.t-,:,-r.-·-~
FROM: Tom·,B. Bennett, Jr. -~~
Chief, Organic Chemiscry Section~:·•
.., . '.
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'-t,··~;._;.;.':·.,-.:'~,.:':·;{-/~·.-'i".~_·..;_:-.;·, ·.a;:~-•·.-· .1.
--.. •. • "'' . {'.:£'." .
Attached are the results of analysis of samples collected as part of
the subject project.
If you have any questions please contact me.
ATTACHMENT
C) -· ?> ~ -:::::, ~ .... .,._ ·~ u.. r-.. ,:-_,.-
c:::: c:, "•'-~
LL.J -· ;:-_z.:; -· Q..
:::::, c--....,· a::
Cl) --°= !.u ~
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-
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--·-- - ------- --- -
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD; ATHENS, GA.
PURGEABLE ORGANICS DATA REPORT ........... · ................ .
•• . PROJECT NO. 91-491 .SAMPLE NO. 55184 SAMPLE •• ·SOURCE: .N BELMONT· PCE'SITE . •• STATION ID: NB-2 GRIFFIN, LUCILLE RESIDENCE
•••••• TYPE: DRKWA • •
,·
• ':, •••••••••••••••••••••••• ti it~~~: E~~~~o~fF . COL_LECTED B~t: BN~ERGER
·,COLLECTION START:. 02/28/91 0915 STOP: 00/00/00
-03/07/91
• ••••• •• •• .. .. •• ••••••• • •••••• • • • • • • • • • • • • • • • • • • • • ...
UG/L
5.ou. 5.0U 5.0U 5.0U 5.0U 5.0U r~tl 5.0U 5.0U 5.0U .12u 1.6AJ 5.0U .sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
• • • • • • • • • • ANALYTICAL RESULTS
CHLOROMETHANE . . ·· VINYL CHLORIDE' · BROMOMETHANE CHLOROETHANE TRICHLOROFLUOROMETHANE
• • •
1 ;1-DICHLOROETHENE(1, 1-DICHLOROETHYLENE) ACETONE · ·. .. . ·.
CARBON DISULFIDE METl1YLENE CHLORIDE TRANS-I ,2-DICHLOROETHENE
~i~vEl¼~k~:~PHANE
CIS-1', 2-DICHLOROETHENE 2,2-DICIILOROPROPANE METHYL ETHYL'· KETONE BROMOCHLOROMETHANE CHLOROFORM 1,1,1-TRICHLOROETHANE 1,1-DICHLOROPROPENE
T~~~81c~[6~~~~R~~iDE· BENZENE . . . TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
• • • • • • • • • . :.• . UG/L
5.0U ,12U 5.0U · 5.0U 5.0U 7.6A 5.0U :12u 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
ANALYTICAL RESULTS
cis-1, 3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-I ,3-DICHLOROPROPENE 1, 1.2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIOROMOCHLOROMETHANE CHLOROBENZENE 1 ,1 ,1 ,2-TETRACHLOROETHANE ETHYL BENZENE CM-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1 ,1 .2,2-TETRACHLOROETHANE 1.2.3-TRICHLOROPROPANE O-CHLOROTOLUENE P-CHLOROTOLUENE 1 ,3-DICHLOROBENZENE 1 ,4-0ICHLOROBENZENE 1 ,2-DICHLOROBENZENE
'., .. ·i·
. l.t' ,,
.L
, .
. , ••*REMARKS_•••
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN · '·· •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
-
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM
EPA-REGION IV ESD, ATHENS, GA.
PURGEABLE ORGANJcs·DATA'REPORT
••• • • • • • • • • • • • • • • • • = • •••••••••••••
•• PROJECT NO. 91-491 SAMPLE NO. 55185 SAMPLE TYPE: DRKWA
•• SOURCE: N BELMONT PCE SITE
" 'STATION ID: NB-3 KEETER, DONALD RESIDENCE ..
• • •(·• ....... ·• ................ .
.PROG ELEM: NSF COLLECTED BY: B BERGER
. CITY: BELMONT ST: NC
'COLLECTION START: 02/28/91 0920 STOP: 00/00/00
03/07/91
• ••••• •• .. .. .. ······· ........... ,•:•.··· ....................................................... .
UG/L ', ;" ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETHANE VINYL CHLORIDE BROMOMEHIANE .. · CHLOROETHANE .
TRICHLOROFLUOROMETHANE
1'; 1-DJCHLOROETHENE C 1 , 1-DICHLOROETHYLENE)
ACETONE ·
CARBON DISULFIDE
METHYLENE CHLORIDE TRANS-1,2-DICHLOROETHENE
1,1-DICHLOROETHANE VINYL ACETATE· ..
CIS-1,2-DICHLOROETHENE
2, 2·-DI CIILOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM ' .. 1 ,1. 1-TRICHLOROETHANE
1,1-DICHLOROPROPENE
CARBON TETRACHLORIDE
1.2-DJCHLOROETHANE
BENZENE . . TRICHLOROETHENE(TRICHLOROETHYLENE)
1,2-DICHLOROPROPANE DIBROMOMETHANE
BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 12U 5.0U · 5.0U 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U
5-.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CIS-1.3-DJCHLOROPROPENE
METHYL ISOBUTYL KETONE
TOLUENE TRANS-1,3-DICHLOROPROPENE
1,1.2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1.3-DICHLOROPROPANE
METHYL BUTYL KETONE DIBROMOCHLOROMETHANE
CHLOROBENZENE 1,1.1,2-TETRACHLOROETHANE
ETHYL BENZENE CM-AND/OR P-)XYLENE
0-XYLENE · · . STYRENE
BROMOFORM BROMOBENZENE 1 .1.2,2-TETRACHLOROETHANE
1 ,2,3-TRICHLOROPROPANE
0-CHLOROTOLUENE P-CHLOROTOLUENE
1 .3-DICHLOROBENZENE'
1 ,4-DICHLOROBENZENE
1,2-DICHLOROBENZENE
'H
••~REMARKS•••
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE
•K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE
•U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS.THE.MINIMUM QUANTITATION LIMIT.
OF PRESENCE OF MATERIAL;:
GIVEN
---------·-------
. ., \\ 1'1. \ ~., J ' .
----- - - -
PURGEABLE ORGANICS DATA REPORT ••• •• •• •• ••
• • • • • • • • • • • • • • • PROJECT NO. 91-491 SAMPLE SOURCE: . N BELMONT PCE SITE ·sTATION ID: NB-4 DEESE. J.C.
• • • • • NO. 55186
RES .
.. - - - - - - - - -
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD,.ATHENS, GA.
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • SAMPLE TYPE: DRKWA .PROG ELEM: NSF . CITY: BELMONT COLLECTION START:
COLLECTED BY: B BERGER ST: NC 02/28/91 0925 STOP: 00/00/00
--03/11 /91
• • •
••• •·• •••.••••••••••••••.•••••••••••••• * •••••••. • ••••••••••••••••••••
UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
... .. .. ..
. .. ...
5.0U 5.0U 5.0U 5.0U 5.0U 0.90J sou 12U 5.0U s.ou 5.0U '5~~~ 5.0U sou 5.0U 5.0U s.ou. s.ou 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETHANE VINYL CHLORIDE BROMOME TflANE ·· CHLOROETHANE TRICHLOROFLUOROMETHANE . 1 ,1-DICHLOROETHENE(l ,1-DICHLOROETHYLENE) ACETONE CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1 ,1-DICHLOROETHANE · .
VINYL ACETATE CIS-1 .2-DICHLOROETHENE 2. 2-DICIILOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMET.HANE . CHLOROFORM . . 1,1,1-TRICHLOROETHANE 1 ,1-DICHLOROPROPENE · CARBON TETRACHLORIDE' 1 .2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
s.ou 12U ·s,ou
5.0U 5.0U s:ou 5.0U 12U ,5.0U ,5.0U :s,ou :5.0U 5.0U 5.0U s.ou .5.0U :s.ou ,5.0U 5.0U 5.0U 5.0U ·5.0U 5.0U •5.0U
CIS-1 ,3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1.3-DICHLOROPROPENE 1,1,2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIDROMOCHLOROMETHANE CHLOROBENZENE 1 ,1,1 .2-TETRACHLOROETHANE ETHYL BENZENE· (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1 .2,2-TETRACHLOROETHANE 1.2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1 ,3-DICHLOROBENZENE 1 ,4-DICHLOROBENZENE 1 ,2-DICHLOROBENZENE
-if.·
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED . •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL •K-ACTUAL VALUE 15 KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT. , , !
PURGEABLE ORGANICS DATA REPORT ........... • ..... ·•· ........ .
•• PROJECT NO. 91..:491 SAMPLE NO. 55187
•• SOURCE;-. N BELMONT PCE SITE
•• STATION ID: NB-5 MESSSER, MAY RES.
••
. SAMPLE AND ANALYSIS MANAGEMENT SYSTEM
EPA-REGION IV ESD, ATHENS. GA.
• • • • • • • • • • • • •·• • • • • • • • • • • • • • • •a• • • • • • • •
SAMPLE TYPE: DRKWA PROG ELEM: NSF COLLECTED BY: B BERGER
· CITY: BELMONT ST: NC
:·.coLLECTION START:· 02/28/91 0930 STOP: 00/00/00
03/07 /91
• •••••• .. •• .. • •
••• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • * •••••••••••••••••••••••••••••••
. . UG/L ANALYTICAL RESULTS :UG/L ANALYTICAL RESULTS
s.:ou 5.0U
. 5.0U 5.0U 5.0U 5.0U . sou
12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETH~NE .
VINYL CHLORIDE
BROMOMETHANE
CHLOROETHANE TRICHLOROFLUOROMETHANE
1 ,1-DICHLOROETHENEC1 ,1-DICHLOROETHYLENE)
ACETONE. . ,
CARBON DISULFIDE: METHYL ENE CHLORIDE
TRANS-1 .2-DICHLOROETHENE
1 ,1-DICHLOROETHANE
VINYL ACETATE . CIS-1, 2-DICHLOROETHENE
2,2-DICHLOROPROPANE
METHYL ETHYL KETONE.
BROMOCHLOROMETHANE
CHLOROFORM .
1 .1 ,1-TRICHLOROETHANE
1,1-DICHLOROPROPENE
CARBON TETRACHLORIDE
1.2-0ICHLOROETHANE
BENZENE·
TRICHLOROETHENE(TRICHLOROETHYLENE)
1,2-DICHLOROPROPANE
DIBROMOMETHANE
BROMODICHLOROMETHANE
•••REMARKS•••
,5.0U 12U ··s.ou
5.0U 5.0U 5.0U. ·s.ou 12U 5.0U 5.0U ·s.ou 5.0U 5.0U 5.0U ·s.ou ·s.ou
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
5.0U 5.0U
CJS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TOLUENE TRANS-1.3~DICHLOROPROPENE
1 .1 .2-TRICHLOROETHANE
TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1.3-DICHLOROPROPANE
METHYL BUTYL KETONE
D!BROMOCHLOROMETHANE
CHLOROBENZENE 1 ,1.1,2-TETRACHLOROETHANE
ETHYL BENZENE
CM-AND/OR P-)XYLENE
0-XYLEN~ · STYRENE BROMDFORM BROMOBENZENE 1,1,2.2-TETRACHLOROETHANE
1,2,3-TR!CHLOROPROPANE
0-CHLOROTOLUENE
P-CHLOROTOLUENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
1,2-DICHLOROBENZENE
•••FOOTNOTES••• . .
•A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-EST!MATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL.
•K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN
•U-MATERIAL WAS ANALYZED FOR BUT NOT DETE_CTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT. ',' ,~:
------_,_ ---·------
.,
c;
----- --... --... -- - - - - - - - -
PURGEABLE ORG~fHCS DATA REPORT
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD, ATHENS, GA .
••• • • • • • • • • • • • • • • • •• PROJECT NO. 91-491 SAMPLE •• . SOURCE: N BELMONT PCE SITE •• . STATION ID: PARKER, F ,' RES
•• ,,!.:
• • • • • • • • • • • • • • • NO. 55188' SAMPLE TYPE: DRKWA • • • • • • • • • • • • • • • • • • • • • • • • • • • • · -.PROG ElEM: NSF "CITY: BELMONT '_COLLECTION START:
COLLECTED BY: B BERGER ST: NC 02/28/91 0940 STOP: 00/00/00 ..... ~;··· . • • • • • • • • • • •••••••••••• ••• • • •••• • • • • • • • • • • •
UG/L
5.0U 5.0U s.ou 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U 12U 3.4AJ 5.0U . sou 5.0U 5.0U 5.0U s . .ou 5.0U 5.0U 5.0U 0',96AJ 5.0U. 5.0U .5.0U
ANALYTICAL RESULTS
CHLOROME THANE . VINYL CHLORIDE BROMOMETHANE ..
.CHLOROE THANE TRICHlORDFLUOROMETHANE 1.1~DICHLOROETHENE(1,1-DICHLOROETHYLENEJ ACETONE CARBON DISULFIDE
.¥U~~:~~~~g~~~E6~6ETHENE .1., 1-DICHLOROETHANE VINYL ACETATE ' . . CIS-1 .2-DICHLOROETHENE 2,2-DICIILOROPROPANE MEJHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM •·
1 : 1 :.J j" rnrn~:s~~g~rn~NE
CARBON TETRACHLORIDE' 1 ,2-DICHLOROETHANE BENZENE . TRICHLOROETHENE(TRICHLOROETHYLENEJ 1,2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
UG/L
5.0U ,, 12U
5.0U 5.0U s:ou 4.2AJ 5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
ANALYTICAL RESULTS
CIS-1.3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1.3-DICHLOROPROPENE 1.1,2-TRICHLOROETHANE ·TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETHANE CHLOROBENZENE 1.1.1.2-TETRACHLOROETHANE ETHYL BENZENE CM-AND/OR P-JXYLENE 0-XYLENE .. STYRENE BROMOFORM BROMOBENZENE 1, 1 .2.2-TETRACHLOROETHANE 1,2,3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1,3-DICHLOROBENZENE 1 ,4-DICHLOROBENZENE 1 ,2-DICHLOROBENZENE
_j 1'
03/07/91
• • • •
• • • •
... .. .. ..
•• •••
•••FOOTNOTES;•• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
OF PRESENCE OF MATERIAL GIVEN
PURGEABLE ORGANICS DATA REPORT .......................
•• PROJECT, NO. 91-491 SAMPLE NO. •• SOURCE: N BELMONT PCE SITE' •• STATION ID: NB-8 RESSELL. D. RES
SAMPLE ANO ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD, ATHENS, GA.
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 55190 SAMPLE TYPE: DRKWA ,PROG ELEM: NSF , COLLECTED BY: B BERGER CITY: BELMONT · · ST: NC COLLECTION START: 02/28/91 1005 STOP: '00/00/00
03/07 /91
• ••••• .. .-•• •• • • •• ••• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •'• ••••••••••• * •••••••••••••••••••
. UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
S,OU s.ou •s.ou s.ou s.ou s.ou sou 12U 5.0U 5.0U s.ou 12U 5.0U 5.0U sou s.ou s.ou 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETHANE. VINYL CHLORIDE BROMOMETIIANE CHLOROETHANE TRICHLOROFLUOROMETHANE 1,1-DICHLOROETHENE(l,1-DICHLOROETHYLENE) ACETONE . • . CARBON DISULFIDE.' METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1,1-DICHLOROETHANE VINYL ACETATE CIS-1,2-DICHLOROETHENE 2.2-DICIILOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1 .1.1-TRICHLOROETHANE 1;1-DICHLOROPROPENE CARBON TETRACHLORIDE 1.2-DICHLOROETHANE BENZENE ' ' TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE D !BROMOME THANE BROMODICHLOROMETHANE
5:ou 12U 5.0U 5.0U 5.0U 5.0U s.ou . 12U 5.0U 5.0U s.ou s.ou s.ou
5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CIS-1.3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1.3-DICHLOROPROPENE 1,1,2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETIIANE CHLOROBENZENE 1,1.1,2-TETRACHLOROETHANE ETHYL BENZENE CM-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1,2.2-TETRACHLOROETHANE 1.2,3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1 ,3-DJCHLOROBENZENE 1,4-DICHLOROBENZENE 1,2-DICHLOROBENZENE
..
•••REMARKS•••
•••FOOTNOTES••• . •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL ' •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN . . •.
•LI-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT. ,",-.:;,',\c!:
.. -· -PURGEABLE ORGANICS DATA REPORT ••••••••••••••••••••••• •~ . PROJECT NO. 91-491 . · SAMPLE NO. 55191 •• . SOURCE: N·BELMONT PCE SITE •• STATION ID: COLLETTE; J. RES
------ - ----SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD, ATHENS, GA.
• • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • SAMPLE TYPE: DRKWA PROG ELEM: NSF .. CITY: BELMONT COLLECTION START:
COLLECTED BY: B BERGER ST: NC 02/28/91 1020 STOP: 00/00/00
--03/07 /91
• • • ••• •• •• ... .. •• .....................................................................
UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS s.ou 5.0U 5.0U 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U 12U 6.0U 5.0U sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U .5.0U 5.0U 5.0U
CHLOROMETHANE. 1 '. VINYL CHLORIDE BROMOMETHANE CHLOROETHANE TRICHLOROFLUOROMETHANE 1. 1-DJCHLOROETHENE(l. 1-DICHLOROETHYLENE) ACETONE CARBON DISULFIDE METHYLENE-CHLORIDE" TRANS-1.2-DICHLOROETHENE 1, 1-DICHLOROETHANE VINYL ACETATE CJS-1,2-DICHLOROETHENE 2,2-DJCIJLOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1. 1.1-TRICHLOROETHANE 1 ,1-DJCHLOROPROPENE CARBON TETRACHLORIDE. 1 ,2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1 ,2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U
CIS-1 .3-DICHLOROPROPENE METHYL !SOBUTYL KETONE TOLUENE TRANS-1,3-DICHLOROPROPENE 1. 1 .2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1.3-DICHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETHANE CHLOROBENZENE 1 ,1. 1 .2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1,2,2-TETRACHLOROETHANE 1,2,3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1 ,3-DICHLOROBENZENE 1,4-DICHLOROBENZENE 1,2-DICHLOROBENZENE
:
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE-JS KNOWN TO BE GREATER THAN VALUE GIVEN •U-MATER!AL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITAT!ON LIMIT. • I
'
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*****MEMORANDUM******
DATE: 03/ 12/91 : ,,, .
SUBJECT: Result~ 6f' Purgeable Orgariic Arialysis:· j ,-.
91~500 NORTH BELMONT
.::-: .BELMONT NC .
FROM: Tom B.
Chief,
Bennett, Jr •.
Organic Chemis~ry Section&1WI
·. . . -· ·' ....
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T():' BILL; BOKE"(:,:_; .·
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Attached are the results of a11alysis of samples collected as part of
the subject project.
··1f you have any questions please contact: me.
'ATTACHMEl<T
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- - -
PURGEABLE ORGANICS DATA REPORT
-----SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD; ATHENS, GA. ---- -
... . . . . . . . ·• ............ . • • • ••• • • • • • • • ·=·· ••••••• • • • • • • • • • • • • • • • • • • " · PROJECT NO. 91-500 ,.·,:SAMPLE NO. 55.493 • • SOURCE:. NORTH BELMONT •• STATION ID: NB11 J.D. SHERRILL ••
SAMPLE TYPE: DRKWA .PROG ELEM: SSF ,CITY: BELMONT ·,COLLECTION START:
COLLECTED BY: J NOLAN ST: NC 03/07/91 0820 STOP: 00/00/00
--03/11/91
•••••• •• •• •• ••
·••·• ••••••••.•••••••••••••••••••••••• : •.•••.•••••• * •••••••••••••••••••••
-UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U s.ou s.ou 5.0U
s.ou ·sou · 12U 5.0U 5.0U s.ou 12U s.ou 5.0U ·sou 5.0U s.ou 5.0U 5.0U 5.0U 5.0U s.ou 5.0U s.ou 5.0U s.ou
CHLOROMETHANE VINYl CHLORIDE BROMOMETHANE CHLOROETHANE TRICHLUROfLUOROMETHANE 1 :1-DICHLOROETHENE(1 ,1-DICHLOROETHYLENEJ ACETONE . · · · .
CARBON DISULFIDE . METHYLWE CHLORIDE TRANS-1.2-DICHLOROETHENE 1,1-DICHLOROETHANE VINYL ACETATE CIS-1 .2-DICHLOROETHENE 2. 2-DICliLOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1.1, 1-TRICHLOROETHANE 1,1-DICHLOROPROPENE CARBON TETRACHLORIDE· 1.2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE D!BROMOMETHANE BROMODICHLOROMETHANE
5.0U ·:12u 5.0U s.ou 5.0U 5.0U s.ou 12U 5.0U 5:0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U s.ou s.ou 5.0U s.ou s.ou
CIS-1,3-DICHLOROPROPENE METHYL !SOBUTYL KETONE TOLUENE TRANS-1.3-DICHLOROPROPENE 1. 1,2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIDROMOCHLOROMETHANE CHLOROBENZENE 1 ,1. 1,2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1, 1,2.2-TETRACHLOROETHANE 1,2,3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE . 1 ,3-DICHLOROBENZENE 1,4-DICHLOROBENZENE 1. 2-DI,CHLOROBENZENE
-,,, '
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN
•LI-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT. \a: ' '
\.
PURGEABLE ORGANICS DATA REPORT ••• ••• • • • • • • • • • • • • • • • • • • •• PROJECT NO. 91-500 SAMPLE NO. 55494 •• . SOURCE: NORTH BELMONT •• STATION ID: ND12 CHORCH
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD, .,ATHENS, GA.
• • • • • • • • • • • • SAMPLE TYPE: DRKWA
.... · ........ . ••••••••••••••••••
.PROG ELEM: SSF CITY: BELMONT COLLECTION START:
. COLLECTED BY: J NOLAN ST: NC 03/07/91 0835 STOP: 00/00/00
03/11/91
• •••••• .. .. .. •• .. ... ... . ~:• ............................................................. .
: UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U · 12U 5.0U 5.0U sou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETHANE VINYL CHLORIDE BROMOMETHANE CHLOROETflANE ·TRICHLOROFLUOROMETHANE 1 ,1-DICHLOROETHENE(l ,1-0ICHLOROETHYLENEJ ACETONE '
CARBON OISULFIDE METHYLENE CHLORIDE TRANS-1,2-DICHLOROETHENE 1 ,1-0ICHLOROETHANE VINYL ACETATE CIS-1,2-DICHLOROETHENE 2,2-DICHLOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1,1,1-TRICHLOROETHANE 1,1-DICHLOROPROPENE CARBON TETRACHLORIDE 1,2-0ICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENEJ 1.2-0ICHLOROPROPANE D IBROMOME THANE BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 12U 5.0U . 5.0U 5.0U s.ou 5.0U s.ou 5.0U 5.0U 5.0U s.ou s.ou 5.0U 5.0U 5.0U . 5.0U· 5.0U
CIS-1,3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1,3~DICHLOROPROPENE 1,1,2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENEJ 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIDROMOCHLOROMETHANE CHLOROBENZENE 1, 1 ,1,2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-JXYLENE O .. XYLENE STYRENE .
BROMOFORM BROMOBENZENE 1,1.2,2-TETRACHLOROETHANE 1.2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE . . 1 , 3-0 I CHLOROBENZENE ·'. 1,4-DICHLOROBENZENE 1,2-DICHLOROBENZENE
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL. •K-ACTUAL VALUE IS KNOWN TO.BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN
•U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT. ,_j'J ':' i \i.!i
' ,
r,-
------- - - -
PURGEABLE ORGANICS DATA REPORT ... . ·• . •-... , ......... . •• PROJECT.NO. 91-500 SAMPLE •• SOURCE: NORTH BELMONT •• STATION ID: NB13 D CLANTON
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM · EPA-REGION IV ESD, ATHENS, GA.
• • • • • • • • • • • • • • • • • --~ ....... . •• • • • • • • • • • • • • • • • • NO. 55495 SAMPLE TYPE: DRKW.~ . COLLECTED BY: J NOLAN .. PROG ELEM: SSF ·.cnY: BELMONT ·:coLLECTION START: ST: NC 03/07/91 0845 STOP: 00/00/00
-03/11/91
••••••• •• .. •• .. .. ... . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~ ............................... .
UG/L ANALYTICAL RESULTS U_G/L ANALYTICAL RESULTS
s.ou s.ou s.ou s.ou s.ou s,ou sou ··12U s.ou s.ou s.ou 12U s.ou s.ou sou ,5.0U 0.76AJ s.ou s.ou 5.0U s.ou s.ou s.ou 5.0U s.ou s.ou
CHLOROMETHANE VINYL :CHLORIDE·-·· BROMOMETHANE CHLOROETHANE TRICHLOROFLUOROMETHANE 1 ,1-DICHLOROETHENE(l ,1-DICHLOROETHYLENE)
ACETONE · '" • CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1,1-DICHLOROETHANE VINYL ACETATE CIS-1 .2-DICHLOROETHENE 2, 2-DICIILOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1 ,1,1-TRICHLOROETHANE 1 .l~DICHLOROPROPENE CARBON TETRACHLORIDE. 1,2-DICHLOROETHANE BENZENE · TRICHLOROETHENE(TRICHLOROETHYLENE) 1.2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
s.ou ·12U s.ou s.ou 5.0U s.ou s.ou 12U s.ou s.ou s.ou 5.0U s.ou s.ou 5.0U s.ou s.ou s.ou s.ou s.ou s.ou s.ou s.ou s.ou
CIS-1 ,3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1,3~DICHLOROPROPENE 1, 1, 2-TRICHLOROETHANE · TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETHANE CHLOROBENZENE 1 ,1. 1 ,2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1, 1. 2, 2-TETRACHLOROETHANE 1,2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1,3-DICHLOROBENZENE 1,4-DICHLOROBENZENE 1 ,2-DICHLOROBENZENE
-, .:, ., r
•••FOOTNOTES•••· _ · · : · -·: •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-'INTERFERENCES. •J-ESTIMATED VALUE· •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF •K-ACTUAL. VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE'GIVEN · •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
MATERIAL
....,:,\.; \in,
'
-
PURGEABLE ORGANICS OATA REPORT •••••••••••••••••••••••• •• PROJECT NO. 91-500 SAMPLE NO. 55496
•• SOURCE: NORTH BELMONT ••' STATION ID: NB14 J JORDAN
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD, ATHENS, GA.
• • • • • • • • • • • • • • • • • • • • • . . . . •· ........... .
SAMPLE TYPE: DRKWA ·' PROG ELEM: SSF CITY: BELMONT 'COLLECTION START:
COLLECTED BY: J NOLAN ST: NC 03/07/91 0905 STOP: 00/00/00
03/11 /91
• •••••• .. .. .. .. .. ..................................... ··• .............................. .
·UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U 5.0U
5.0U 5.0U s.ou 5.0U sou 12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U sou 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U
CHLOROMETHANE VINYL CHLORIDE BROMOMETHANE CHLOROETHANE ' TRICHLOROFLUOROMETHANE 1 .1-DICHLOROETHENE(1 .1-DICHLOROETHYLENEJ ACETONE CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1,1-DICHLOROETHANE VINYL ACETATE CIS-1,2-DICHLOROETHENE 2,2-DICHLOROPROPANE METHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1,1,1-TRICHLOROETHANE 1,1-DICHLOROPROPENE CARBON TETRACHLORIDE 1 .2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENEJ 1,2-DICHLOROPROPANE DI BROMOMETHANE BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U 0.64AJ 5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CIS-1,3-DICHLOROPROPENE METHYL ISOBUTYL KETONE
TOLUENE TRANS-1 .3-DICHLOROPROPENE 1,1,2-TRICHLOROETHANE TETRACHLOROETHENECTETRACHLOROETHYLENE)
1,3-D!CHLOROPROPANE METHYL BUTYL KETONE DIOROMOCHLOROMETHANE CHLOROBENZENE 1,1.1,2-TETRACHLOROETHANE
ETHYL BENZENE (M-AND/OR P-JXYLENE
0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1,2,2-TETRACHLOROETHANE 1.2.3-TRICHLOROPROPANE O-CHLOROTOLUENE P-CHLOROTOLUENE 1.3-DICHLOROBENZENE 1 ,4-DICHLOROBENZENE 1,2-D!CHLOROBENZENE
•"' ,j • • .... , •.},"':•I",
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED· · •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE Of MATERIAL •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN
•U-MATERIAL WAS ANALYZED FOR OUT NOT DETECTED. THE NUMBER IS THE .MINIMUM QUANTlTATlON LIMIT, ,; . , ,: ,ct; -
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-PURGEABLE ORGANICS DATA REPORT ••• • • • • • • • • • • • • • • • • • • • • •• PROJECT NO. 91-500 SAMPLE NO. 55497 •• SOURCE: NORTH BELMONT •• STATION ID: NB15 201 SCHOOL ST ..
- - -- -
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD; ATHENS. GA. ---- -
• • • • • • • • • • • • • . ~ ....................... .
SAMPLE TYPE: DRKWA PROG ELEM: SSF CITY: BELMONT COLLECTED BY: J NOLAN ST: NC
COLLECTION START: 03/07/91 0910 STOP: 00/00/00.
-03/11/91
••••••• •• .. •• .. ... •·• ............................................................... .
UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
s.ou 5.0U s.ou 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U sou 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CHLOROMETHANE VINYL CH LOR IDE. BROMOMETHANE, , CHLOROETHANE ' TRICHLOROFLUOROMETHANE 1.1-DICHLOROETHENE(l.1-DICHLOROETHYLENE) ACETONE CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1, 1-DICHLOROETHANE VINYL ACETATE CIS-1 .2-DICHLOROETHENE 2.2-DICHLOROPROPANE METHYL ETHYL· KETONE BROMOCHLOROMETHANE CHLOROFORM 1,1,1-TRICHLOROETHANE 1,1-DICHLOROPROPENE CARBON TETRACHLORIDE 1.2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1.2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U s.ou 5.0U 12U 5.0U 5.0U 5.0U s.ou s.ou s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U s.ou s.ou
CIS-1 .3-DICHLOROPROPENE METHYL ISOBUTYL KETONE TOLUENE TRANS-1.3-DICHLOROPROPENE 1.1.2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIDROMOCHLOROMETHANE CHLOROBENZENE 1.1. 1 .2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE . BROMOFORM BROMOBENZENE 1,1,2,2-TETRACHLOROETHANE
1,2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1,3-DICHLOROBENZENE 1 ,4-DICHLOROBENZENE 1.2-DICHLOROBENZENE
•••FOOTNOTES•••. •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
OF PRESENCE OF MATERIAL GIVEN. ....
-
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA-REGION IV ESD,. ATHENS, GA. 03/11/91
PURGEABLE ORGANICS DATA REPORT ••• • • • • • • • • • • • • • • • .................. •· ........................... .
NO. 55498 SAMPLE TYPE: BLKWA PROG ELEM: SSF .COLLECTED BY: J NOLAN
... •• ,., •• •• .. PROJECT NO. 91-500 SAMPLE SOURCE: NORTH BELMONT STATION ID: TB1
CITY: BELMONT ST: NC ·COLLECTION START: 03/07/91 1500 STOP: 00/00/00 .. .. •• •••••••••••••••••••••••••••••••• 0 •••••••••••••••••••••••••••••••••••
UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U sou 12U 5.0U 5.0U 5.0U 12U 5.0U 5.0U sou s.ou 5.0U s.ou 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U
CHLOROMETHANE VINYL CH LOR IDE BROMOMETflANE CHLOROETHANE TRICHLOROFLUOROMETHANE 1 ,1-DICHLOROETHENE(l, 1-DICHLOROETHYLENE) ACETONE CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE 1 ,1-DICHLOROETHANE VINYL ACETATE CIS-1,2-DICHLOROETHENE 2,2--DICIILOROPROPANE METHYL ETHYL KETONE· BROMOCHLOROMETHANE CHLOROFORM 1, 1, 1-TRICHLOROETHANE 1.1-DICHLOROPROPENE CARBON TETRACHLORIDE 1 .2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1,2-DICHLOROPROPANE D!BROMOMETHANE BROMODICHLOROMETHANE
5.0U 12U 5.0U 5.0U 5.0U 5.0U 5.0U 12U 5.0U s.ou 5.0U 5.0U 5.0U
5.0U s.ou 5.0U 5.0U 5:0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CIS-1.3-DICHLOROPROPENE METHYL ISOBUTYL KETONE
TOLUENE TRANS-1.3-DICHLOROPROPENE 1.1 .2-TRICHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1,3-DJCHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETHANE CHLOROBENZENE 1,1.1.2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0--XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1.2,2-TETRACHLOROETHANE 1.2.3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1 ,3-DJCHLOROBENZENE 1 ,4-DICHLOROBENZENE 1 ,2-DICHLOROBENZENE
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL .. •K-ACTUAL VALUE JS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN •U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTITATION LIMIT.
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UNITED STATES ENVIRONMENTAL PROTE~TION
COLL;~~I~~AiioN Im:/ .. ·
ATHENS, GA. 30613j' -~--.
*****MEMORANDUM******
DATE:: 03/ 12/91
SUBJECT: Results
91 0 491
·:-.: ._,; ·r.
of.·Purgeable Organi~ Analysis;
-· N. BELMONT: PCE SITE::',:·. -..
BELMONT NC
-FROM: Tom--B·: Bennett, Jr. _
Chief; Organic Chemis:ry
· .. .:, . ::r;'/
:>/:}~: BI~~:··~;KEY
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AGENCY
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·'::.,. ::.:.i.: ..
Attached are the results of analysis of samples collected as part of
the: subject project.
If.you hav~ any questions please contact me.
ATTACHMEKT
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I,
7
PURGEABLE ORGANICS DATA REPORT ••••••••••••••••••••• •• PROJECT NO. 91-491 SAMPLE NO.
•• SOURCE: N BELMONT PCE SITE
•• STATION ID: NB-1 GRIFFIN RENTAL
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM
EPA-REGION IV ESD, ATHENS, GA.
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
55183 SAMPLE TYPE: DRKWA PROG ELEM: NSF COLLECTED BY: B BERGER
. CITY: BELMONT ST: NC
_COLLECTION START: 02/28/91 0905 STOP: 00/00/00
03/11/91
••••••• •• •• ••
•• • •
••• • • • • • • . • •••••••••••••••••••••••••• * •••••••••••••••••••••••••••••••
UG_/,L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U sou · 12U 5.0U s.ou 5.0U 12U 5.0U 5.0U sou 5.0U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U s.ou 5.0U 5.0U.
5.0U
CHLOROMETHANE
VINYL CHLORIDE
BROMOMETHANE
CHLOROETHANE
TRICHLOROFLUOROMETHANE
1,1-DICHLOROETHENE(l.1-DICHLOROETHYLENE)
ACETONE . ·
CARBON DISULFIDE
METHYLENE CHLORIDE
TRANS-1 .2-DICHLOROETHENE
1, 1-0 I CHLOROE THANE
VINYL ACETATE
CIS-1 .2-DICHLOROETHENE
2. 2-DICJILOROPROPANE
METHYL ETHYL KETONE
BROMOCHLOROMETHANE
CHLOROFORM 1, 1, 1-TRICHLOROETHANE
1,1-DICHLOROPROPENE
CARBON TETRACHLORIDE
1 .2-DICHLOROETHANE
BEN2ENE
TRICHLOROETHENE(TRICHLOROETHYLENE)
1,2-DICHLOROPROPANE
DIBROMOMETHANE
BROMODICHLOROMETHANE
•••FOOTNOTES•••
5.0U 12U 5.0U -5.0U 5.0U 0.62AJ s.ou
12U 5.0U 5.0U 5.0U s.ou 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U 5.0U
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TOLUENE TRANS-1,3-DICHLOROPROPENE
1.1.2-TRICHLOROETHANE
TETRACHLOROETHENE(TETRACHLOROETHYLENE)
1,3-DICHLOROPROPANE
METHYL BUTYL KETONE
DIBROMOCHLOROMETHANE
CHLOROBEN2ENE 1 ,1 .1 ,2-TETRACHLOROETHANE
ETHYL BEN2ENE (M-AND/OR P-JXYLENE
0-XYLENE STYRENE BROMOFORM-BROMOBEN2ENE 1,1,2,2-TETRACHLOROETHANE
1,2.3-TRICHLOROPROPANE
O-CHLOROTOLUENE
P-CHLOROTOLUENE
1,3-DICHLOROBEN2ENE
1 ,4-DICHLOROBEN2ENE
1,2-DICHLOROBEN2ENE
,_ I
•A-AVERAGE VALUE •NA-NOT ANALY2ED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE Of PRESENCE OF MATERIAL
•K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE JS KNOWN TO BE•GREATER THAN VALUE GIVEN
•U-MATERIAL WAS ANALY2ED FOR BUT NOT DETECTED. THE NUMBER IS THE MINIMUM QUANTJTATION LIMIT. -. -----

-
-----...... -----.... ....,;
... ----- --···-·---- --- -- - -
PURGEABLE ORGANICS DATA REPORT ••• • • • • • • • • • • • • • • • • • •• PROJECT NO. 91-491 SAMPLE NO. •• SOURCE: N BELMONT PCE SITE •• STATION ID: MAHAFFEY, D. RES.
. •.:.:
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM EPA~REGION IV ESD. ATHENS, GA. . . ·• ................ . • • • • • • • • • • • • • • • • • • • • • • • • • 55189. SAMPLE TYPE: DRKWA PROG ELEM: NSF CITY: BELMONT COLLECTION START:
COLLECTED BY: B BERGER ST: NC 02/28/91 0950 STOP: 00/00/00
03/11/91
••••••• .. •• .. .. .. ................................ •~• .................................. .
UG/L ANALYTICAL RESULTS UG/L ANALYTICAL RESULTS
1200U 1200U 1200U 1200U 1200U 1200U 12000U 3100U 1200U 1200U 1200U 3100U 4BOAJ
1200U 12000U 1200U 1200U 1200U 1200U 1200U 1200U 1200U 170AJ
1200U 1200U 1200U
CHLOROMETHANE VINYL CHLORIDE BROMOMETHANE CHLOROETHANE TRICHLOROFLUOROMETHANE . 1 ,1-DICHLOROETHENE(l .1-DICHLOROETHYLENE). ACETONE · · · ·.
CARBON DISULFIDE METHYLENE CHLORIDE TRANS-1 .2-DICHLOROETHENE 1 ,1-DICHLOROETHANE VINYL ACETATE CIS-1 ,2-DICHLOROETHENE 2. 2··DICIILOROPROPANE MElHYL ETHYL KETONE BROMOCHLOROMETHANE CHLOROFORM 1 ,1 ,1-TRICHLOROETHANE 1,1-DICHLOROPROPENE CARBON TETRACHLORIDE 1,2-DICHLOROETHANE BENZENE TRICHLOROETHENE(TRICHLOROETHYLENE) 1.2-DICHLOROPROPANE DIBROMOMETHANE BROMODICHLOROMETHANE
1200U · 3100U 1200U 1200U 1200U 4100A 1200U . 3100U . 1200U 1200U 1200U 1200U 1200U 1200U 1200U 1200U 1200U 1200U 1200U · 1200U . 1200U 1200U 1200U 1200U
CIS-1,3-DICHLOROPROPENE METHYL ISOBUTYL KETONE
TOLUENE TRANS-1.3-DICHLOROPROPENE 1,1,2-TR!CHLOROETHANE TETRACHLOROETHENE(TETRACHLOROETHYLENE) 1,3-DICHLOROPROPANE METHYL BUTYL KETONE DIBROMOCHLOROMETHANE CHLOROBENZENE 1.1,1,2-TETRACHLOROETHANE ETHYL BENZENE (M-AND/OR P-)XYLENE 0-XYLENE STYRENE BROMOFORM BROMOBENZENE 1,1.2,2-TETRACHLOROETHANE 1.2,3-TRICHLOROPROPANE 0-CHLOROTOLUENE P-CHLOROTOLUENE 1,3-DICHLOROBENZENE 1,4-DICHLOROBENZENE 1,2-DICHLOROBENZENE
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED •NAI-INTERFERENCES •J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE •K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE •LI-MATERIAL WAS A~ALYZED FOR BUT NOT DETECTED. THE NUMBER IS_THE.MINIMUM QUANTITATION LIMIT.
OF PRESENCE OF MATERIAL GIVEN
-.
PURGEABLE ORGANICS DATA REPORT ••••••••••••••••••••••• •• PROJECT NO. 91-491 SAMPLE NO. 55192
•• SOURCE: N BELMONT PCE SITE
•• STATION ID: NB-10 SOLOMON. P. RES .. ••••••••••••••••••••••• UG/L ANALYTICAL RESULTS
CHLOROMETHANE
VINYL CHLORIDE
BROMOMETHANE
CHLOROETHANE
SAMPLE AND ANALYSIS MANAGEMENT SYSTEM
EPA-REGION IV ESD, ATHENS, GA. 03/11 /91
• • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • •••
SAMPLE TYPE: DRKWA PROG ELEM: NSF COLLECTED BY: B BERGER ••
CITY: BELMONT ST: NC ••
COLLECTION START: 02/28/91 1045 STOP: 00/00/00 ••
• • • ·• ••••• • .•• ·• ••• * •••••••••••••••••••••••••
UG/L ANALYTICAL RESULTS
CIS-1 ,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TOLUENE TRANS-1 .3-DICHLOROPROPENE
.. . ..
5.0U 5.0U 5.0U 5.0U 5.0U 5.0U I~l=~~g~~6~~~~~~~J~f~~-DICHLOROETHYLENE) ·
s.ou 25A s.ou s.ou s.ou s.ou 5.0U
1 ,1 .2-TRICHLOROETHANE
TETRACHLOROETHENE(TETRACHLDROETHYLENE)
1,3-DICHLOROPROPANE sou 12U s.ou 5.0U 5.0U 12U 0.79J 5.0U sou s.ou 7. 1A s.ou 5.0U 2.2AJ 5.0U 5.0U 0.61J 5.0U 5.0U 5.0U
ACETONE CARBON DISULFIDE
METHYLENE CHLORIDE TRANS-1.2-DICHLOROETHENE
1 ,1-DICHLOROETHANE
VINYL ACETATE
CIS-1,2-DICHLOROETHENE
2, 2-DI CIILOROPROPANE
METHYL ETHYL KETONE
BROMOCHLOROMETHANE
CHLOROFORM 1,1,1-TRICHLOROETHANE
1,1-DICHLORDPROPENE
CARBON TETRACHLORIDE
1.2-DICHLOROETHANE
BENZENE
TRICHLOROETHENE(TRICHLOROETHYLENE)
1,2-DICHLOROPROPANE.
DIBROMOMETHANE BROMODICHLOROMETHANE
12U s.ou 5.0U s.ou s.ou s,ou s.ou 5.0U s.ou s.ou s.ou 5.0U s.ou s.ou 5.0U 5.0U s.ou
METHYL BUTYL KETONE
DIBROMOCHLOROMETHANE
CHLOROBENZENE 1,1.1,2-TETRACHLOROETHANE
ETHYL BENZENE (M-AND/OR P-)XYLENE
0-XYLENE STYRENE .
BROMOFORM
BROMOBENZENE 1,1,2,2-TETRACHLOROETHANE
1 ,2,3-TRICHLOROPROPANE
0-CHLOROTDLUENE
P-CHLOROTOLUENE
1,3-D!CHLDROBENZENE
1 ,4-DIGHLOROBENZENE
1 .2-DICHLDROBENZENE
•••FOOTNOTES••• •A-AVERAGE VALUE •NA-NOT ANALYZED . •NAI-INTERFERENCES -•J-ESTIMATED VALUE •N-PRESUMPTIVE EVIDENCE OF PRESENCE OF MATERIAL
•K-ACTUAL VALUE IS KNOWN TO BE LESS THAN VALUE GIVEN •L-ACTUAL VALUE IS KNOWN TO BE GREATER THAN VALUE GIVEN '·•
•U-MATERIAL WAS ANALYZED FOR BUT NOT DETECTED,· THE NUMBER IS THE, MINIMUM QUANTITATION LIMIT. ,., , , / ,,, ,
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l\1EMORANDUM
TO: File
FROM: G.Doug Rumford ~
Hydrogeologist ~
NC Superfund Section
DATE: 3/31/99
SUBJECT: North Belmont PCE Site
Ref. 1 7
North Belmont, Gaston County, NC
NCD 986 187 128
1991 Residential Drinking Water Sample Data
The laboratory data sheets for the organic chemical analysis performed on drinking water samples collected at the North Belmont site between the period of2/27/91 to 3/6/91 were obtained from the Gaston County Health Department (GCHD). All samples were collected by James "Doc" Thompson of the GCHD and submitted to the NC Division of Laboratory Services, State Laboratory of Public Health in Raleigh, NC for analysis. According to Mr. Thompson, no field notes were taken at the time of sample collection, however, all drinking water samples were collected at the specific wellhead unless otherwise noted on the request for analysis form. Mr. Thompson also stated that no chain of custody forms exist other than the NC Division of Health Services Analysis Report co_ver form (DHS Form 2364, Revised 1/87 & 9/89) which was submitted to the laboratory with each set of sample containers. These forms were returned to the GCHD with the summary analytical data sheets (DEHNR Form 3068-0, Revised 1/91) for each sample.
I contacted Mr. John Neal, Head of the Division of Laboratory Services Organics Laboratory, to inquire about the quality control (QC) validation package for the samples in question. Mr. Neal informed me that a QC package does not exist for these samples because the lab does not generate QC packages for samples submitted by county health departments. The laboratory analytical data sheets for the samples collected by the GCHD are included as an attachment tci this memorandum.
1' · \
NAR-29-99 MON 4-09 PM -•. I u,_:,1,,, .. ,._,.,,. • ,~. ,_, • •
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ENV HEALTH
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North Carolina Department of Hwn&n Re•ources
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Laboratory Section
P.O. Bo~ 28047, Ral~lgh, 11.C. 2~611
En,lroQ.mQctal Sciences Anl17ai~ Report
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ct,,vlb<nzcoc
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c., r-:x.idi sul fi 6c
2 ~xi""""
L..-:-c thy I -2:f-'n ta"'°""
~
\' i r,vl HctAtc
r•\•ou /¼1'1
··•--...
ENV HEALTH
TEL:1-g1s-733-9S55 1 4 , 91
. '
S!Alc l"80MtOO{ Of l'UOLIC 111:Allll
Oh·1s,~~ Of lr(nl,TIC ::;crw1a::~. H.C. ocrN'Ur,E)if 0(. l(JlVJl R(SOJRC(5
r.o. oox 2004) -30. N. ll!LM!NC.IOII, SI., AAlclC/1, N,C, 21611
1.)./\ 1/0 .. "'i:/1 /J {,_Q 7 '1 I 11/. 0 )f
r!(LO t ·---·--·-----... -TYPE I l ( l --,-y---, ( l
l-'111S fvo/ I Lo/~o : vo/1 l.c/l·o vol I 1,0/I·<" .,o/ I uo/ko
10 --L. -. J , . ,,..,. ' -·--~-~-K -,-·--· ,o ·-·-··--. ·--·---·.--.....,...,_
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h lt>< lllnlrn.,,, Cr.tc<tioo Limlt.
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·MAR-29-99 MON 4: 10 PM ENV HEAL TH ' '. { .. • p_ ,, 5
.,,
~::~;;
t~t.
?\f.
1
~::-.· . ' N,C, Dept, of linvirn'fiment, .Health and Natu,al Resources
~r .,
i_;
Nam~~-C)f Owner,
or Supply:
Co):
.....
Division-?;bi. L8.0oratory Servicoi
Stat8 Lab~:tory of Public Health
. P,O, Box 28'0'4'1, Raleigh, N,C. 27611 -~,q
EnvironmentiSciencea Analy•i•_Report
.i:_;_c=:
Patient \rf·. /v'1, ,_--f-l fJ <-/i .•. 3f, I -s -
, h, r: -,r<
/;Jc-t{1~ ~-,.,,.~,,;.
-IO?I rr'c~i
. ,· ·-.. -. . "., .. :
•lJ:!\T1,~ClfrJi SriEET(S)
--~;[ ii; ---. -· _, _____ _
-~i : . ----1-------.. ·--------1
I ••, • ••:-:-•-. . :;,
---------------___ , ______ _
cYI.
ENV HEALTH
TEL:J-919-733-9555 M,:lr 14,91
N, C. DEPARTMENT Of E~VI~ME~T, HfALTK, & IVITURAL RESOURCES
DIVIS!()I Of I.ABOMTORY SERVICcS, ENYIRONMENTAL SCIENCES SECTI~
9/0 /_~·~• SOX 26047 -306 H. WILMINGTON Sl, RALEIGII, '1.C. 27611
L,bor~lory No. ___ IP_,.J:>l.~--PVRGEABLE COHF'CXJNDS Date of ,t,nalysls
-COHF'O<..IND ~g/1:
0 i ch I orodff i uorm.e thane ·-·---
ChloM'!>ltt\.lne '
1\/Jny! Ch Jerido ---Srororetl1•11c --·
~h I Ot:Q!1th.ne
Tri chlororl uorcrnethane I •·
✓l, 1--0ichli!foethylene I I<. ·2:f·.,.
Kethv1e~ Chloride I
tert-6utvl Methyl Ether ;.
tron,-l. :>;;.o\ ch 1 oroeth~l ene I , ..
. ::·etMr ) .,,.:.
1 1-Dichloroethane .;_ ..
2. 2--0\ ch lo ne .. •";·.
cis-1 2-0°ich lo"""lhvlene I :J '7:•
Chloroform' ~-);;·
IBO'll A.......,,.hloran&thane ..
✓I 1. lwTrlehlo,..,.,thane ~-.
I .1-Dichlor ' ' ne . ~ .-.
✓~rbon Tetrachloride ··f': i, ,:_:. .• ~.
✓Benzenecci;-/').' --~ ✓I. 2-01 chloroethane -,~ae;
✓Trlchloroifhvlene 7 . , .· 7-,
"i°µ; e~lorMr,.,,,,.,e ., ~ . ~!. t,·,
&l'O'T'Odlcnlo=thane ~· -~{~:
Oibramrethane ~-
TolueM /=;· ;,J:~
I 1. 2-Trkhloroet hane -I "': ~;::.·
Tttrachlmjnathvlen, s~.-I. 3-0ich•·~ (.' •ne u. . '
Dib~•lo-~th•n• -~
I. 2-0lb~thone reoe1 !ll"il
1-<:h l orot;iixane ~r' ' . :{l .. ~ ._ •• ,_ ... __ ,_ I
-.f ;.;,
J -£,ti~:valuo. :·
K -Aclualwalue \s known to t>e less th«n v
L -~ctu,1?¾1ue is known to t>e g;e&ler tha
u -r~ler\;j(t4'a, •n•ly,ed for bwt not oo\gc
liA -liot &i'ta1yi~d.
I/ -Tenta'~1ve identification. ✓ -Rtgu1@ vex:
\ -\rfh•lcrrelhane ·
.
~D
Ch 1 orobenzooe
Elhvlbenzene
1.1 1.2-Telrachloroeth•ne
o-Xvlene
.!ll::~Yl ~• -o-Xvl ene
-~.i'.ll.. ne
Brcm;,fonn -] hA07P°"
1, 1,2,2-I2~ra£hlo~thaoe
Brorooen Zene
n-1'-ulb.onrRne
1.2,3 Trichlo M
2..r.1, 1 aN>lo I uene
l,~.~-Trlmetbxllll!□l"'"
4..Ch Jn,...,toluene
tert-llutvl • .,
Pentachlor<>elll!n~
1. 2. 4-lrih\hvJbon•aa•
•""-"ot vl !w>nzer,p
D-1 toluene
_1.3-0lchlorooenzene
✓ 1 . 4../ll ~h l n""""nzene
n-llutvlbenzeno
1 '-Di • nzene
als (2-Chloro\ ll HMr
1 2-0ibrmo-3-Chloroproo.rne
I.? 4-Trlc~I ,,.,me
~xachlorobutad\ono
H•nhtha l ene
1,2 3-Trichlorooenzene
-••.--
; • 1.0 µg/1,
'
I
.....,,., /I"-
11
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l,IAR-29-99 MON 4: 11 PM P-.. ··7 ·, r-
.: PI .
ENV HEALTH
TEL:[phone] · ···" .. ,\ 14:21 No.oo;;-P.07,;C
Lat>ora tory No,
N, C, OEPAATHENT Of EHVlROHMEHT, HEALTH, ~ NATIJRAL Rf5ClUlC€S
O!Vl$!0N Of LABORATORY SERYICl;S, ENVl~~l,',L SCIENCES SECTION P.O. SOX 29047 -306 H. WILMISGTON ST, RALEIGH, H.C. 27611 ~/ut,,tJ :-P\IFIGWLE COl1POONOS Date of .-.nalysls _ _.,q+b._l----11,-.:;t,,_.Jf/ I } If/.,
Oichlorodlfluorore hb.h
Chlorarethane
vVi n l or Ide
ch 1 oroethane
ne
Q · • ·~•chlori&!
C011POU~O
Cltlorobenzene
Ethvl!>!,nzene
1. 1.1.2-T•trachlo"""th•ne
n_YulaM
lll::~XJtne
o.~vlcne
StVl'$1>&
B.......,,,fo=
-]benzene
1 1 2.?-Tetrachlorooth•""
Brcrrobenzene
n-Prnnvlben,ene
1 • ~-Trlchlo Ile
2-Chlorotoluen•
1 ~ S-Tr\,n,,lhv]kAn••~
d..r.h 1 l'>M tr, 1 uo~
• • .... t'-'1 Benrene
Oan••chloroelhMe
1. 2. •-Trimethvlbenzene
sec-8utv1 lu>nzenc
o.· 1to1ue"<'
1. "-"lehl"'"""'"nzen!
vl ,4...Jl\chtomt,,,ntene
n-But vl benze""
I 2_nichlorobenzon• ·
81• f2-Chlorols~=vll Ether
l. 2-D1 braro-3-Chlo, ,no
1 2 4-Trl•hlo~nzene
!<Qx~ch 1 orobutad\ •no
N•nht.hale-
1 2 3-Tr\rh]nMh,,nzene
(
502.2), is l.O i,g/1. r ~,.
: gl~en.
lue(given.
~ ;.-·
!
)'g/1 ,, .. ;,-
I
---
1 '
1' -
MON 4 12 PM
, I .
ENV HEETH I
I TEL: 1-919-/,33-9555 ~ -~ Mar-14.s11
·'r. r l ,
N. C. 0€P/\RTMENT OfiEHVll!Ofi~~NI, HEALT~, & HATUIV.L Rl':SCXJRCES
0lVISION OF L~TOIIY.,SE~V!CES, EHYll!Olllif.H!AL SC!~NCES SECT!Ot/
L~boratory Ho,
P.O. BOX 28047 -. H.' WILMINGTON ST, ML~ICH, H.C. 27611 91!)4z 3 i :·,f'.UROENJLI: COl!PWIOS Dah of Analysis J'. I -3
D hlorodlfluorarethane
Ch 1 0l'el!let.li.! ne
✓1 1
thane
-e To ";·i} ·
OO'tENT l"\,'d e,Y\ \-i+i'ui
J -E~
K -l,c
L -Ac
u -~ NA:.-~
1/ -· T
✓ -R
T -Tr
ootectlon L\rnlt for water (
\i v,lue.
·• 1 ut i I kn0'1'n to l>e · ,lue h known to l>e ,realer t
, was ;inalrzed for but ool dQ
lyzed.
lv• identification. ed VOC . th.ane-
-
CO'tPWt;O
.. Chlol"Obcn,gao
Eth~lbenzene
.lJ., 112-Tetrach!_?rootharoo -· n_):vJcne
~-· o-Xvlene
Stvrene
Brarofonn
Is 1benzene
1.1.2' Tetrachloroethane
B rmoben UM
n..P,.,.,,vl l>Pn ,ene
1 2.3-Trlchlornoroo.ne
2-{;hlorotoluene
1.3 ,.rr\..,th•lbenzene
4-Chloroto luene
uirt-8utv1 Benzene ...
Pentachloro.!lhane
1 ~.4.Tr;_,,olhAnzene
sec-llut~l !leni~n~
e-1SQ2CQQ\ll tel"""°
1 3..tJlchlorobenzene
✓1 1 4-0lchlo~n,~n~
n-Butvlh.>nzono
l, ,..n1 enlor~n,.ne
Bis (2-Chlorols,.,,......,vl) Ethar
].2-llibr~.1-"hlor,.,,,,r~ane
1 ., i.r,l•""..,.;..,,nzene
flexach lorobuhdltne
Haohthalen•
1 2 3-Tr' nzene
..
--·--··-········--· --
i5 1,0 JJ9l1.
)Jg/1
-u,, -
.
-
..
~---~~-· I
tca..c ......
t)
'] , 'Ii l .
--·1r·-
-· --------·---· ... -,-·--.
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Labor• \ory No,
4 12 PM
, I i ric1 : 1 -(1, ,:1-?<-i:,-•,c;5c-, --... _ .. _ '("._,_:,_ ..
f ~ t l
1 /1 '.-_,.··, .. ...........
·N, ~. DEPARTMENT OfiYlROHMENT, HEALTH, 4 HAT!AlAL RESOURCES OIYISIOO Of'. LABORATOR -SERVICES, ENYIROl'ii'!ENTAL SCIENCES SECT!~ .
9 P.';;, BOX 28041 -3 :-_},-WILHINGTON ST, RALEIGH, N.C, 27611
/0/j,,).J_ f PlJRGf.ABLE COllP(XJNOS Date of Analysis
"' i,
COllf'OJ'/0 . COM?WI/D
Oichlorodifluorcn"Cthano
Cl11oramth.ine
Sh ne
Trichlorofluororethane
vS.!nz
✓1 2-
✓Trlchl
1 2-'
c;;:;; i.x:1-·ccl :m; •• =,-.-.-.. -w . ..::::::.=:,
a, 1 oroben '""" -.
_l,), 1.2-Tetr~,hlo,:wthane
o-Xvlcne
m-Xvler.e
o-Xvlene
Stvrene
Brrm->fonn
h · --,h.ti,n,j)ne
l.1 2.2-Totrachloroethane
n, '"" --l""••Ano
1, 2, 3-Trl sh lOr::£21"09,1.Qe
2-Chlorotoluene
l.3.5-Tr\ ... thvl~n7•ne . 4-th·tomln Ju•""
~tert-Subl ~filne
Pentachloroethane
1 2,4-Trirrethvlbenzene
sec-&Jtvl Benzene
~-! Holueno
1.~-Qlchl£robenzen•
✓ 1 , 4-0 I ch 1 orobenzene
n-6utvlbenzeM ' 1 ,..11 chlnrobenzene
Bl< I •..1'~ 1 ~ro 1 • --11 Ether
1.2-0 braro-3-<:h l c ne
1.2.4-Trichlorobenzene
u..ach lnrobutadlene
N1ohth• lane , 2.3-Tr\ehlo""""nzene
·-··
-
--
-
-· --w.,~-• •---
~· .--i,;:;.;.~,1.!ic• . ·,
·-
vg/1
I I
--
-
...,-.,,_,..,
,1
_I') • iJ,
"
'
f:J-1·:-39 MON 413 PM
.rl.
ENV HEALTH
TEL, !-'Jl9-
.,
3~·.9555 ":i
'' :1··
.,I
N, C, DEPARTMENT Of ::• IROH~ENT, HEALTH, & NATURAL RESOUlCES
DlV!SJON Of l.ABOOATOI! $~RVIC£S, ENVIRONMENTAL ~CIENCES SECTIOO
Laboratory HO,
{. P.O. 80X 28047 -3 :;_: WtLKJHGIOO ST, RALEIGH, ~.C, 27611
1 / (J(p ;J (p -~RGEA5LE WiPWIOS Odte of Analysis
..... ..
·.::::··~-----
:tx:.i?WIIO .. 'Ii ,:
Olchlo=~l.f:;l=uo"'rone==l:':'h=•=ne====+=-""""!
Chlo n&
J • Ei;\.
K • Act°
L -Aclil
U • 114 le.
~A :-i.ot
1/ -Ton ✓ -Re9.
1 -Trlh
~
hane
e
t. }; .·i
; Vl/)se.i'
aluef\s"knO!<n to tJe less th~n
lUE.'i is, known lo be greater tn·
· was;/analyzed for but I\Ol d<:lt
yzed. :
•• iilentlf\cation. o voc ,
' lh•na .
1 .
• -
CONP00/1D
g;;zci; ----· ·-····-··--Ch 1 orcoonzene
..tl,.h.;'.J_benz•n•
1,1, l,?-T•l~hlot9<>lh~ne
n-Xvlene
m-X~lene·
o-Xvl ene
St~rc,ie
8ro:rofonn
ls 1i,,.n,.ne
I, 1.~.2-Tetr*chloroethaoo
Bruro!,en,en•
n..f>=vlbenzena
1.2 3-Trlchlo==•n•
2-Chlorotolu~ne
1 3 5-Trlrrethvlben:ene
4~hlorotoluene
••r• ~ .. ,v, A,,nzene ...
Pentachloroethane
l ,:4-T•I ·" " nrerte
sec--Sulvl Benzene
n .t,-r""'"lt-01uene
1,3..nlchloreoenten~
✓l ,t:!l\shlorobenzene
•..Autvlben?ene -
1.2 .J\t .... --.n••ne
Bis (2-Chloro\so,,,.,.,,vl) Ethsr
1 2-Dibraro-3~hlo t
1 2-4-Trlchlo..-.hon••n&
llexachlor,.;,utadltne
Haohthal•n•
1 2.3.Trlchlorobenzene
-----
is 1.0 ~~/1.
)lQ/1
.
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11 q-29-99 'MON f 14 PM ENV HEALTH .. ,.,,1 > ~}
11.c. I>Qpt. or
'.;,
0 j Vi S} OU :
St~te Laboe
P.O. Box 28
11•·· .,
-~~/-Patient A .·· ~r -t· v--l ___ -----='...::....:.-.;,
'" M ..,... ,.._+
__ ..1_ -_;_-_:__:_____;~
l,,J ~~---~-
. ;,},.,o· ..
• 'f .. t-i.S-'i
/{t ·•:::t:--+----+-_.; :J;~ ~1-=f=-. -l------+-----=
\·~· '· -+---.. ··. ··-· . ::'ft ~~ . ~ . --~;
l "' •·
. • ~ '.,: ;, h
, Hialcb and Natural·Re•ources
:~boratory S~rvices
.~Y of Public Health
·: Ralo,ir;h, N.C. 270ll t; .. -.
•'encea Allalysis Report
!(esults
..... ---···-· .· :.~ ~·; / . .:_, ;:i .
ATTACHED SHEIT(Sl ----=+:-=---
____ ,, ___ _
ate Reportt-d
. C
. ' , · ¥.),ate An~l yzed
f.· $eported By;
-~i. r .
----------
'
4 14 PM ENV HEALTH . . . p ., 2 . · 1
TEL=l-919-?33-9555 Mar 14,91 14:2?~1io.003 P.bi~. f . ~ ~-~~-. ,,· . (: ~-It17.li)
N. c. oEPMlHcNT ~i~VIROH11EHT, HEAL TK, & NMUAAL Rcscwec~ ~l, ') 1 l1 1991 ·
OIV!SlON Of l.A!IOAA!=:'SERvlCcS, EHVI~l'i<:HlAL SCIENCES :;Ecri: · -~ ....... --n:J
lt!xlratory ~o.
r,) P,O, BOX 28-047 -306H. WILIIINGTON ST, RALEIGH, N.C. 27611. ------~-u D 9 -/lo&-J 1 tPIJRGEABLE <Xl!IPWNOS Date of N,,, -..3 :! <1. -----
.=oi ciiiorodl fluo~thane
Ch than11 .
iL
J -E
K .. A
l -A u .. ,A -
1/ -
y' -R
T -1
haM
" thane EO!ll ____ +---+,
'
for 1<ater·
-:f" --v,iLJ~.
1 ul'i i, knuwn to t,., 1 ess
1uefls ·k11c,,in to bt grot~r t ·
·.,.a,lanalyzed for but no\
yzQ"Q, .
! l&-~t\r\eat\on. · voe _;,
'thane -"'" r
-£ r--~-' ~-~--• .,_.1.L & •• •
·:. --
----·-··
OOl1PWNO ~g/1
Chlorooe~zene ___ -1.f._ __
Ethvl hAnzen·e I
1, 1.1.2-Telrachloroethaoo
o-Xvl ene
f!e-Xvlene -
o-XxleM ··----Stvrene
8,-qrofom, -I lbenrene
1. 1 ? 0-Tatrach 1 orooth•n•
~,El'le
1han:ten1:1 -1.,.~.T•iehlo r>t, -2-Chlorotoluene
l.~.~-Icl~thxlh<inzer><,
~-Cb!Qt:212l~tat ... ---·· tert-8utv1 B<!nrene --·-Pentachloro.otnane
1 • 4-Tr\-thv\h..nzene
sec-8ut~i ·•-nzene --· .,...., ____ ..
P-1 \toluene
1,3:Qlchlorobenzene
✓1 4Jli eh lorobenzcne I .•--·
o:::Sl!Wl ~nzcne I ___ .,
· 1.2-lli-•1-->..-nzene I al• l•--"h 1 o.-olc 11 Ether I
1,2-Dlbraro-3--:hl2C22C££•ne I
l •. a.Tri••lorooen,ene i
~xachl~rooutarli~n! ' '
N>'hthalene I
J..1.,1~Tr I ch 1 o~-~ane ...... .., ...... ·-···--···✓--······-··-
·--···
-····--------.,.,. __ ---
------·-. --···-···----·-·----------····-····••,•··-···
1
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MAR-29-99 MON 4 15 PM
C. r' ! .
ENY HEAL TH r ..
TEL:1-'319-,3-9555
::; ..
P.-I 3 · ·
14:29 No.003 P.O~_-
N. C. OCPAATIIENT OF "iilRONMEHT, HEALTH, & NATURAL RESOJRCES
DIVIS ION Cf i.A8a'.'IT~ :se~VICES' ENVIROH/IEN JAL SCIENCES SECT!OH
Laboratory No.
,1 P.O. SOX 280~1 -3 ':_~• Wllfl!NGTON ST, RALEI~, N.C. 2)611 ! J I,
z_/tJ0,2t '.~RGEABLE COMPOJ/10S Date of Analy$\~ ,~/5,9/ .
T ===.!:'n~e'----1---.-+
✓l !!!!:.ll!U'c~eL_ ___ ---l--__ ~
r
=""------+-----ii
··,.11 ii:"£: ;.; :t
: .j'f.
ane
MOl . tect Ion Lim\ t for •at~r
J -
K -
L -
LJ C
NA
1/
✓
1 -
' ~-..
~V, . .
1·• 1.-nown to be less t s kno.1n to be g~~ate
·na1yzed for but not
,;·,
-~~\i(icotlon.
_ane_
•. ·e'n,lror,,,ent, ~11th,
·,:
............. = .... •,-.. ,. ···-·
~POJSD ~g/1
,.., l n~n 11.1:1 ..... I
Ethv!benzene
1. 1. 1 2-Tetrach\oroethane
D-YvJane
m-Xv\ e""
o-X~lene
Stvrene
Brgn:,form -I l"--•••n•
T 1 2.2-Totrachloroethane
Bro'llObl!nrene
!benzene
1 , 3-irlchl ·ne
2-rh loroto 1 uen•
1.3.5-Trl-thvlb<snzene
4-Ch 1 orotn l 11•n•
tor• • • ' Benzene
. ~ont4rhJoroethane
1 '-~-Trl-•hv!benzena
••c--8utvl Sen••••
M.,I ·ltoluo••
1.3JJichlorobenz•ne
✓I 4 '11••lorobenzeno
n-8ut v\ h.n10••
1 ' ~I"' 1 orobenzt••
Bis (2-Ch loroi s<YJroovl) Ether
1 , njhraro-3 "hlrn ne
1 2 4-Tr\chl".......__.n,ene
He•achlorobut&dlene
H••hthal•••
1 2 3-Tr\rh!orct>enZfn•
...
-..
~.,_:J<;-ss MON 4: 16 PM ENV HEALTH
c.r-'l. "fEL: 1-919-.7_33-"•~sss
~ .
1-·.
H. C, DEPAATNEHT OF,EHVIRONM!:NT, HEALTH, g /'!ATUML RESOURCES
ll!VI S ION Of i ,<,I\(\f!.1, 10,ii.('.r.rnvrr.r.:., CNVIOO!i1•,[]/! Al cc ICNCCC CCCTION
P.O. BOX 28047 -3GfN, \l!L~IHGTON ST, RALEIGH, N,C, 27611 /
LaboratoJ,:to~ 9/{){e,39 .IPlJRGEABLE CXJMPOJl/0S Date of Analysis -"'j"+-/.J:::._-.....1.4l-:::/
Ch
8
✓l
J -
K •
L -u -
NA
1/
I -
1 -
' HO --~-, ~;
J... hMe
-;,,··
CXJNPOUNU
--~---·....:·---· --Qilorooenzene
Ethytooniene
l ·l I 2-Telrachloroelh&ne
p-Xylene -· l!l-Xvlenc
a-Xylene
S t V l'I' M
Bron:ifonn
I H'W:lnzene
1 l. 0 . ,. Tetrach loroet~ne
8, .
n-l' -"ene
L2.3-Trichlo ne
-1::l;hlorotoluene
1,3,5-Trjmethylbenzene
4-NllnMtnluene
tert-8u•·•• 0 •nzene
Ponlachloroolhtne
1 -2 4-Trimet'•d••·zene
aec---""tvl Benzene
D-I tto\uent
1 3.Jl\chlnrobenzen~
.fl 4-0lchlorooenzene
n--Butvl benzerA!
1,i-0i,blorobi!nzgne
Bis 1'-,.hloro\ 11 Eth•r
1. 2--0i bron:i-3-Chlo ne
1. 2. 4-Tri ch lorot>enzent
Hexachln•.-.h"tadlene
H'"hthalene
1. 2. 3-T r I ch I orooenunt
---..•
--·· ----t-,.-
--·
is 1.0 µ,/1.
-
.
~g/1
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--
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ENV HEAL TH P. 15 t.P I . TEL: l -~, l '::-7:, 3-'_9555 Mar·Ll,~I1 lil : '30 t,lo . C11)'3 ·f-'. i)il. _; . ~::
N, C. DEPARTMENT Ofi.EHVIROI/IIENT, HEALTH, & NATUAAL RE~CES
O!VISIO!I Of LIIBO!lATORY SERVICES, ENVIRONl'll:NTAL SCIENCl:S SoCTIOO 9 P.O, IIO~ 21l047 -~-~' ~lLMINGTON ST, AALEI~, N.C, 27611
IO& fo -~:PURGEABLE COMPO..IND5 !Mte of Maly~,~
· .J!.i.ch l omcff fl tiorareth.ne
Ch 1 o rail, l.fuoe :
In Leiilorl de
Trlc ··• · ·' hane
✓I e
ne
th lene
.. , .;..,+-~------,r;:-_._ __ ~
'.
:~~:·. .. ,,. .. ·-."'·
==---" -..
COMPOOND
•···---
et, I oroben1.ene
_fi!J1lbenzene
1.1 1 2-Telrachloroethane
e-X~lene -··•-•-.--· .. m-Xvlene
n.Xvlene
Stvrtne
B ra,x:, fo m,
' lb1mzene -
...11,2,2-TetrachlQ..roethane
Ar-orrroen zene
"-P""'vlbenzene
t.2 3-Trichlo Ill!
• r hl n~tolueae
I •.B-Trl=•hvlbenz&n~
4-ChlorotnluMe
tert-Butvl ••nzene
~~tachloroethan~
1.2 4-rrl-thvlbenze,,e
ll!""C:~utvl n ...............
"-ls tlt!"'\1ul!'ne
l-3-0ichlnr-obenzene
✓I 4-"lrhl"""""'nzene
n~utvlbenzene
1.,.Dichtoroben••ne
Bis 12..l'.hlorois 1) Ether
1. '-lllbraro-3...1'.hloroormane
1 • 4-Trlchlorobenzene
~xach'""""utadierv,
W•nh!ha1•n•
l.' 3-Trichloro!>enzeae
-
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Is t.0 ~g/].
........ :.
µ~/1
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--
--.-.. -
-~-
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-
ENV HEALTH
r
Resourc11s
Post-tr brand fax lr&nsmitlcl n,erno 7W'\. , •'f'09fl, J....
fn,"' ~ . 'J, .,; ti(. o_, (
._,
P-::"-=-sa;,,~------..-+-----~--
eµ
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$;:,i; I i rA:,;HEu SHEn{S}
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~A8CP.ATORY SSCTIO~
OCCUPAT!OOAL HEALTil
· r·:,;,,;,,:,~-,,;t ,ITritlfloro·.:..
. ethene
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ethene
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Rankin l"orest RI!'
, . ;\.(,~· (fl:. 1i i; (
t"iU'LLT, N. e.
11[14 0.tillONlA 15' OUADNANOU:
Nl5l5-WBI00/7 5
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.,.
MOUNTAIN ISLAND LAKE, N. C.
35080•CB•TF•02~
·.-·•;·
UfM G••C 4"'0 1969 ■&.QN[11C JrrlORTH octL''""''o"' u c,.,,,. or s~tc,
57' 3("
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Ref. 19
The ijazard Ran.king System· ·
Guidance Manual
.. · interim Final ·
. i
. ' '
Hazardous Site Evaluation Division Office of Solid Waste and Emergency Response U.S. Environmental Protection Agency
1 Washington, DC 20460
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...... _. REF. 20
MEMORANDUM
TO: File
FROM: G.Doug Rumford _. ,tj:;~)
Hydrogeologist ~--
NC Superfund Section
DATE: 4/8/99
SUBJECT: North Belmont PCE Site
North Belmont, :Gaston County, NC
NCD 986 187 128
NC Organics Laboratory Analytical Method
I
Mr. John Neal, Head of tpe Division of Laboratory Services Organics Laboratory contacted
me via electronic mail with his response to the question I posed to him regarding the method his lab
used to analyze the samples and related QA/QC procedures. The samples in question are the North
Belmont Elementary School well sample (lab# 910607 collected 2/25/91) and the Hughes residential
well (lab #910633 collected 2/~7/91). The samples were collected by the Gaston County Health
Dept. and received by the NC Division of Laboratory Services Organics Laboratory on 2/26/91 and
2/28/91 respectively. Both samples were analyzed for purgeable organic compounds. Mr. Neal's
response is as follows:
The standard procedure for Health Department samples would be the following:
Sample for volatile organic analysis would have been collected in 40 ml vials
with 2 drops of 1: 1 HCL, filled to overtlowing, with no air bubbles and sealed
with a teflon lined cap. Samples from Health Department are sent via State ·
Courier in styrofoam mailers with blue ice packs and maintained at 4 degrees C
until analysis.
Samples for volatile analysis are screened by EPA Method 502.2 (Purge and Trap,
Gas-liquid Chromatography, Photoionization/Hall Detectors), and possibly confirmed by EPA
Method 624/524 (Purge and Trap, Gas-liquid Chromatography, Mass Spectrometer).
The QA/QC procedures would include the analysis of a trip blank and/or lab blank, external
standard calibration, ~d the addition of an internal standard to samples and blanks prior to analysis.