NCD062555792_19980930_Sigmons Septic Tank Service_FRBCERCLA PA SI_Combined Preliminary Assessment Site Inspection - Volume I Report-OCR

ll•
ill--
fl ' r §
I ,,, -·ag¼ . -R:v~ . ' ,· ,.•;.,
• '\>' 1;'•' "-'
a:•HuN
NOR f ,,;, /:: ·:.
.·; . . ..
~ ---? !Z.S .:;;; ? . ~~---
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WASTE MANAGEMENT
September 30, 1998
Mr. Philip H. Vorsatz, Chief
NC Site Management Section
US EPA Region IV Waste Division
61 Forsyth St., 11th Floor
Atlanta, GA 30303-3104
Subject: Combined Preliminary Assessment/Site Inspection
Sigmon's Septic Tank Service
Statesville, Iredell County, N.C.
NCO 062 555 792
Dear Mr. Vorsatz:
This report contains the findings of the Combined Preliminary
Assessment/Site Inspection of the Sigmon's Septic Tank Service Site (NCO 062
555 792) located at 1268 Eufola Road, approximately 5 miles southwest of
Statesville, in Iredell County, North Carolina. The site has been the location of a
septage removal business from 1970 to the present, under the names of Sigmon's
Septic Tank Service, AAA Enterprises, and Sigmon Environmental Services. The
business has pumped septic tank wastes and heavy sludges from residential,
commercial and industrial customers, has installed and repaired septic tanks, and
has provided a variety of waste removal services to various industries. The
current landowner is Mrs. Ruby Sigmon.
From 1978 to 1992, Sigmon's Septic Tank Service disposed of septic
wastes in ten lagoons on the 15 acre facility property. The wastes were described
as septage, grease, and milky white liquid. During that time period, groundwater
samples were collected by the North Carolina Department of Natural Resources
and Community Development and the North Carolina Division of Environmental
Management (DEM) from on-site monitoring wells and from nearby drinking
water wells. Analysis revealed elevated levels of metals and organics.
In 1992, after discussions with DEM, the North Carolina Hazardous Waste
Section conducted a site investigation and sampling trip at the Sigmon's site to
401 OBERLIN ROAD, SUITE 150, RALEIGH, NC 27605
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EM PL.OVER -50% RECYCLED/I 0% POST-CONSUMER PAPER
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Mr. Philip Vorsatz
September 30, 1998
Page 2
determine if the wastes in the lagoons were hazardous. Lagoon samples and drinking water
samples were collected. Analytical results indicated detectable or elevated levels of 7 metals and
13 volatile organic compounds in the aqueous samples, and 4 metals and 18 volatile organic
compounds in the sludge samples. All levels were below the RCRA TCLP levels for toxicity
characteristic. Following the investigation, the Hazardous Waste Section determined that
because the chemical constituents of the lagoons did not meet the definition of a hazardous
waste, the site did not fall under its jurisdiction, and the site was referred to the North Carolina
Solid Waste Section for evaluation.
ln 1995, DEM required the closure of the lagoons. The lagoon sludges were excavated to
a depth of l O feet, mixed with sawdust, and piled on-site in the lagoon area. The lagoons were
backfilled with dirt obtained from the facility property. In December 1995, the site was referred
to the North Carolina Superfund Section by the Division of Environmental Management
regarding removal options of the piled sludge.
In December 1996, the site was added to the CERCLIS database for further investigation.
In January 1997, the North Carolina Superfund Section referred the site to the EPA Emergency
Response and Removal Branch for removal evaluation. El' A responded in April 1997 indicating
that the site did not meet the criteria for removal eligibility.
Historical groundwater and drinking water sampling and analysis has revealed elevated
levels of contaminants. Two residents have been advised by the North Carolina Occupational
and Environmental Epidemiology Section not to drink the water due to elevated levels of nitrates,
mercury, and manganese.
The septage removal business is currently active under the name Sigmon's Environmental
Services. Septic wastes are temporarily stored in four cylindrical tanks on the property, and the
sludges arc periodically removed and transported to a wastewater treatment plant for disposal.
The owner of the business, Ms. Mary Sigmon, lives on the property. Drinking water for her
home and the business office is obtained from a drinking water well onsite.
On August 25 and 26, 1997, the North Carolina Superfund Section conducted sampling
for the combined Preliminary Assessment/Site Inspection at the Sigmon's Septic Tank Service
site. Samples were collected from the waste pile, the open pits, the former lagoon area, the
storage tank area, the overland surface water pathways, the surface water pathways (S WP),
nearby drinking water wells, and nearby monitoring wells. Results of note from the August
1997 PA/SI sampling event are summarized below:
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Mr. Philip Vorsatz
September 30, 1998
Page 3
Location
Lagoon Arca
Waste Pile
Storage Tanks
Open Pits
Groundwater
Overland surface water
pathways
Surface water pathways
Parameters Detected at Levels
Significantlx Above Background
Barium, chromium, lead, mercury, silver, 2-butanone, toluene, 2-hexanone,
chlorobenzene, ethyl benzene, xylenes, 1,4-dichlorobcnzene, 1,2-
dichlorobenzene, naphthalene, phenanthrene, anthracene, fluoranthene, pyrene,
butyl benzyl phthalate, bis(2-ethylhexyl) phthalate, 2-methylnaphthalene, 4-
methyl phenol
Barium, chromium, lead, mercury, silver, 2-butanone, benzene, 4-methyl 2-
pentanone, toluene, 2-hexanone, tetrachloroethene, chlorobenzene, ethyl
benzene, xylenes, 1,4-dichlorobenzene, 1,2-dichlorobenzene, fluoranthenc,
pyrene, butyl benzyl phthalate, bis(2-ethylhexyl) phthalate, 4-methylphenol
Barium, bis (2-ethylhexyl phthalate)
Barium, lead, mercury
Barium, chromium, lead, manganese, mercury, chlorobenzene, 1,4-
dichlorobenzene, 1,2-dichlorobenzene
Lead, manganese
Barium, chromium, lead, manganese
Surface water runoff from the source areas flows radially northwest, west, southwest,
south, and southeast. Runoff to the northwest enters an intermittent stream, which carries the
flow to PPE I, a wetland above an isolated pond. Drainage from the pond flows intermittently to
two successive isolated ponds, the Sliwinski ponds, at PPE2. Runoff from the source areas to the
west, southwest, south, and southeast is intercepted by a drainage ditch along the north side of
Lauren Drive. The flow is carried through a culvert to the Davidson pond, an isolated pond at
PPE3. Intermittent flow from both the Sliwinski ponds and the Davidson pond join to form the
headwaters of a perennially flowing unnamed tributary to the Catawba River, at PPE4.
The 15 mile surface water pathway downstream of PPE4 begins at an unnamed tributary
to the Catawba River, continues to the Catawba River, and ends approximately 0. 7 mile south of
the Iredell/Catawba/Lincoln County line junction, near the confluence with Little Creek in
Lincoln County.
The two nearest fisheries arc located below PPE4 in the unnamed tributary, and in the
Davidson pond, at PPE3. The nearest wetland is located at PPEI. Based on the analytical
results, releases of barium, chromium, lead, and manganese have been documented within the
Davidson pond, below PPE3. The Davidson pond is considered a fishery. A release of
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Mr. Philip Vorsatz
September 30, 1998
Page 4
manganese has been documented in the unnamed tributary to the Catawba River, below PPE4,
upstream of a fishery.
Geologically, the site is located in the Piedmont province, underlain by well-drained soils
with a subsoil of reddish clay, on granite, gneiss, and schist. The weathered material generally
ranges from several feet to several tens of feet. Most ground water occurs at a depth of less than
150 feet, much of it in the upper 30 feet of bedrock. The drinking water supply for the City of
Statesville is obtained from a surface water intake on the South Yadkin River, north of the City.
Many other nearby towns and communities purchase water from the City. All other areas obtain
drinking water from individual wells or community wells. There are seven community wells
within a four mile radius of the Sigmon site. There are no surface water intakes within the 15
mile surface water pathway downstream of PPE4.
Seven drinking water samples and two monitoring well samples were collected during the
PA/SI sampling investigation in August 1997. Analytical testing revealed elevated
concentrations of barium, chromium, lead, manganese, mercury, chlorobenzene, 1,4-
dichlorobenzene, and 1,2-dichlorobenzene in groundwater, as compared to background levels.
Three residents were advised by the North Carolina Occupational and Environmental
Epidemiology Section not to drink the water from their well.
The property is actively being used for the operation of Sigmon' s Environmental
Services, which employs five workers. Work areas include one source area, the soil surrounding
the storage tanks. Other source areas are not within 200 feet of work areas. Public access is not
limited on the south side of the property, and unauthorized persons have entered the property
with recreational vehicles. Soil exposure is considered a minimal threat.
Based upon the findings of the assessment, it is recommended that the Sigmon's Septic
Tank Service site be the subject of an Expanded Site Inspection (ES!). The primary concerns at
the site are the effect the site has had on drinking water and the apparent migration of
contaminants to surface water pathways that are used for recreational fishing.
Please contact me at [phone] ext. 317 if you have any questions regarding this
report.
Sincerely,
~/,{}-;;)fP;J-,rr-
Donna J. Wilson
Environmental Engineer
NC Superfund Section
'
:1
1:
II
·'
I
I
I
I
I
I,
I
I
I
I
I
I
I
I
I
I
...
STATE OF
NORTH CAROLINA
Department of Environment
and Natural Resources
Division of Waste Management
Supe,fund Section
COMBINED PRELIMINARY ASSESSMENT/SITE INSPECTION
VOLUME/
Sigmon 's Septic Tank Service
NCD 062 555 792
Statesville, Iredell County, Norlh Carolina
Reference No. 06611
September 1998
Donna J. Wilson
Environmental Engineer
Division of Waste Management
Supe,fund Section
,· \ -~f,~~~':":~~\•·' ---•-,,, :~; ,• > ••,••.,;•1: • f. I ft .~.1, •••\•~. • i: ;<: ,. • .. ?,•,•--; ~-=-~. -:--•,;:•;-:-~•--:::,,:·•~
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
COM.BINED PRELIMINARY ASSESSMENT/SITE INSPECTION
Sigmon's Septic Tank Service
NCO 062 555 792
Statesville, Iredell County, N. C.
Reference No. 06611
Septem her 1998
Superfund Section
Division of Waste Management
North Carolina Department of Environment
and Natural Resources
Prepared by:
f(JILUL-b(jj;__~
Donna .I. wilson
Environmental Engineer
Reviewed by:
~ i>illleRosa
Site Evaluation & Removal
Branch Head
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
TABLE OF CONTENTS
EXECUTIVE SUMMARY
1.0 INTRODUCTION ....................................................... 1
2.0 SITE DESCRIPTION .................................................... 1
2.1 Location ......................................................... 1
2.2 Site Description ................................................... 1
2.3 Operational History and Waste Characteristics ........................... 1
3.0 WASTE/SOURCE SAMPLING ............................................ 8
3.0.1. Previous Sampling -March 1987 ..................................... 8
3.0.2. Previous Sampling -August and September 1992 ....................... 11
3.0.3. Previous Sampling -September 1993 ................................. 11
3.1 Waste/Source Sample Locations ..................................... 14
3 .1.1 Lagoon Arca -Sample Locations ..................................... 14
3.1.2. Waste Pile -Sample Locations ...................................... 20
3.1.3. Storage Tanks -Sample Locations ................................... 20
3 .1.4. Open Pits -Sample Locations ....................................... 20
3.1.5. Background -Sample Locations ..................................... 21
3.2 Waste/Source Sample Analytical Results .............................. 21
3.2.1. Analytical Results -Lagoon Area .................................... 21
3.2.2. Analytical Results -Waste Pile ...................................... 24
3 .2.3. Analytical Results -Storage Tanks ................................... 25
3.2.4. Analytical Results -Open Pits ....................................... 25
3.3 Conclusions ..................................................... 25
4.0 GROUNDWATER PATHWAY ........................................... 26
4.1 Hydrogeology ................................................... 26
4.2 Previous Groundwater Sampling .................................... 28
4.3 Targets ......................................................... 40
4.4 Sample Locations ................................................. 42
4.5 Analytical Results ................................................ 43
4.6 Conclusions ..................................................... 45
5.0 SURFACE WATER PATHWAY .......................................... 46
5.1 Hydrology ...................................................... 46
5.2 Targets ......................................................... 48
5.3 Sample Locations ................................................. 49
5.4 Analytical Result ................................................. 50
5.5 Conclusions ..................................................... 54
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
6.0
7.0
SOIL EXPOSURE AND AIR PATHWAYS ................................. 55
6.1 Physical Conditions ............................................... 55
6.2 Soil and Air Targets ............................................... 55
6.3 Soil Sample Locations ............................................. 57
6.4 Soil Analytical Results ............................................. 57
6.5 Air Monitoring ................................................... 58
6.6 Conclusions ..................................................... 58
SUMMARY AND CONCLUSIONS ....................................... 58
PHOTOGRAPHS
REFERENCES
APPENDlXA
I
I LIST OF TABLES
I Table 1. September 1980 -Groundwater Analytical Data Summary ................. 5
Table 2. I Table 3.
March 1987 -Lagoon Sample Analytical Data Summary .................. 11
August/September 1992 -Inorganics Analytical Data Summary ............ 12
I Table 4. August/September 1992 -Organics Analytical Data Summary ............. 13
I Table 5. September I 993 -TCLP Analytical Data Summary ...................... 15
Table 6. September 1993 -Volatile Organics Analytical Data Summary ............. 16
I Table 7. September 1993 -TPH Analytical Data Summary ....................... 17
I Table 8. August 1997 -Source Analytical Data Summary ........................ 22
Table 9. August 1997 -Source Analytical Data Summary ........................ 23
I Table 10. Source Area Contaminant Summary .................................. 26
I Table 11. Onsite Wells -Historic Monitoring Summary ........................... 32
Table 12. I Table 13.
Onsite Wells -Historic Monitoring Summary ........................... 33
Cascadden Well -Historic Monitoring Summary ........................ 35
I Table 14. Shepperd Well -Historic Monitoring Summary ......................... 36
I Table 15. Davidson Wells -Historic Monitoring Summary ........................ 37
Table 16. John Lamberth Well -Historic Monitoring Summary ..................... 38
I Table 17. Lamberth/Potts Well -Historic Monitoring Summary .................... 39
I Table 18. Community Public Wells ........................................... 40
Table 19. Groundwater Population ........................................... 41
I Table 20. August 1997 -Groundwater Analytical Data Summary ................... 44
I Table 21. Wetland Frontage ................................................. 49
I
I
....... _, ..
I
I Table 22. August 1997 -Overland Flow Pathway Analytical Data Summary .......... 51
Table 23.
I Table 24.
August 1997 -Sediment Analytical Data Summary ...................... 52
August 1997 -Surface Water Analytical Data Summary .................. 53
I Table 25. Residential Population ............................................. 56
I Table 26. Wetland Acreage ................................................. 56
I
I
I
I
I
I
I
I
I
I
I
I
I ,.
I
I LIST OF FIGURES
I Figure I. Topographic Quadrangle Map ........................................ 2
I Figure 2.
Figure 3.
Site Characteristics ................................................. 3
1992 Sampling -Lagoon Layout ...................................... 9
I Figure 4. 1993 Sampling -Lagoon Layout ..................................... I 0
I Figure 5. PA/SI Sampling Locations -August 1997 .............................. 18
Figure 6. PA/SI Sampling Locations -August I 997 .............................. 19
I Figure 7. September 1980 -Temporary Well Locations ........................... 29
I· Figure 8. September 1987 -Well Locations .................................... 30
Figure 9.
I Figure I 0.
Residential and Monitoring Well Locations ............................ 31
Probable Points of Entry and Intermittent Streams ....................... 4 7
I
I
I
I
I
I
I
I
I
I
i~
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
EXECUTIVE SUMMARY
The Sigmon's Septic Tank Service site is located approximately five miles southwest of
Statesville in Iredell County. The subject property has been the location of a septage removal
business from 1970 to the present, under the names of Sigmon's Septic Tank Service, AAA
Enterprises, and Sigmon Environmental Services. The business has pumped septic tank wastes
and heavy sludges from residential, commercial and industrial customers, has installed and
repaired septic tanks, and has provided a variety of waste removal services to various industries.
The current landowner is Mrs. Ruby Sigmon.
From 1978 to 1992, Sigmon's Septic Tank Service disposed of septic wastes in ten
lagoons on the 15 acre facility property. The wastes were described as septage, grease, and milky
white liquid. During that time period, groundwater samples were collected by the North Carolina
Department of Natural Resources and Community Development and the North Carolina Division
of Environmental Management (DEM) from on-site monitoring wells and from nearby drinking
water wells. Analysis revealed elevated levels of metals and organics.
In : ·)92, after discussions with DEM, the North Carolina Hazardous Waste Section
conducted a site investigation and sampling trip at the Sigmon's site to determine if the wastes in
the lagoons were hazardous. Lagoon samples and drinking water samples were collected.
Analytical results indicated detectable or elevated levels of 7 metals and 13 volatile organic
compounds in the aqueous samples, and 4 metals and 18 volatile organic compounds in the
sludge samples. All levels were below the RCRA TCLP levels for toxicity characteristic.
Following the investigation, the Hazardous Waste Section determined that because the chemical
constituents of the lagoons did not meet the definition of a hazardous waste, the site did not fall
under its jurisdiction, and the site was referred to the North Carolina Solid Waste Section for
evaluation.
In 1995, DEM required the closure of the lagoons. The lagoon sludges were excavated to
a depth of IO feet, mixed with sawdust, and piled on-site in the lagoon area. The lagoons were
backfilled with dirt obtained from the facility property. In December 1995, the site was referred
to the North Carolina Superfund Section by the Division of Environmental Management
regarding removal options of the piled sludge.
In December 1996, the site was added to the CERCLIS database for further investigation.
In January 1997, the North Carolina Superfund Section referred the site to the EPA Emergency
Response and Removal Branch for removal evaluation. EPA responded in April 1997 indicating
that the site did not meet the criteria for removal eligibility.
Historical groundwater and drinking water sampling and analysis has revealed clcvatccl
levels of contaminants. Two residents have been advised by the North Carolina Occupational
and Environmental Epidemiology Section not to drink the water due to elevated levels of nitrates,
mercury, and manganese.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
n
I
I
The septage removal business is currently active under the name Sigmon's Environmental
Services. Septic wastes are temporarily stored in four cylindrical tanks on the property, and the
sludges are periodically removed and transported to a wastewater treatment plant for disposal.
The owner of the business, Ms. Mary Sigmon, lives on the property. Drinking water for her
home and the business office is obtained from a drinking water well onsite.
On August 25 and 26, 1997, the North Carolina Superfund Section conducted sampling
for the combined Preliminary Assessment/Site Inspection at the S_igmon' s Septic Tank Service
site. Samples were collected from the waste pile, the open pits, the former lagoon area, the
storage tank area, the overland surface water pathways, the surface water pathways (SWP),
nearby drinking water wells, and nearby monitoring wells. Results of note from the August
1997 PA/SI sampling event arc summarized below:
Parameters Detected at Levels
Location Significantly Above Background
Lagoon Area Barium, chromium, lead, mercury,-r,ilver, 2-but:mone, toluene, 2-hexanonc,
chlorobenzene, ethyl benzene, xylenes, 1,4-dichlorobenzene, 1,2-
dichlorobenzene, naphthalene, phe1ianthrenc; c:i:1ihraccnc, lluoranthenc, pyrcnc,
butyl benzyl phthalate, bis(2-cthylhexyl) phthalatc, 2-mcthylnaphthalenc, 4-
methyl phenol
Waste Pile Barium, chromium, lead, mercury, silver, 2-butanone, benzene, 4-methyl 2-
pentanone, toluene, 2-hcxanone, tetrachloroethenc, chlorobenzene, ethyl
benzene, xylenes, 1,4-dichlorobcnzene, 1,2-dichlorobcnzcne, fluoranthcnc,
pyrene, butyl benzyl phthalate, bis(2-ethylhexyl) phthalate, 4-methylphcnol
Storage Tanks Barium, bis (2-ethylhexyl phthalate)
Open Pits Barium, lead, mercury
Groundwater Barium, chromium, lead, manganese, mercury, chlorobenzene, 1,4-
dichlorobcnzene, 1,2-dichlorobenzene
Overland surface water Lead, manganese
pathways
Surface water pathways Barium, chromium, lead, manganese
Surface water runoff from the source areas flows radially northwest, west, southwest,
south, and southeast. Runoff to the northwest enters an intermittent stream, which carries the
flow to PPEI, a wetland above an isolated pond. Drainage from the pond flows intermittently to
two successive isolated ponds, the Sliwinski ponds, at PPE2. Runoff from the source areas to the
west, southwest, south, and southeast is intercepted by a drainage ditch along the north side of
Lauren Drive. The flow is carried through a culvert to the Davidson pond, an isolated pond at
PPE3. Intermittent flow from both the Sliwinski ponds and the Davidson pond join to form the
headwaters of a perennially flowing unnamed tributary to the Catawba River, at PPE4.
I
I
I
I
I
I
R
I
I
I
I
I
I
I
I
I
I
I
The 15 mile surface water pathway downstream of PPE4 begins at an unnamed tributary
to the Catawba River, continues to the Catawba River, and ends approximately 0. 7 mile south of
the Iredell/Catawba/Lincoln County line junction, near the confluence with Little Creek in
Lincoln County.
The two nearest fisheries are located below PPE4 in the unnamed tributary, and in the
Davidson pond, at PPE3. The nearest wetland is located at PPE I. Based on the analytical
results, releases of barium, chromium, lead, and manganese have been documented within the
Davidson pond, below PPE3. The Davidson pond is considered a fishery. A release of
manganese has been documented in the unnamed tributary to the Catawba River, below PPE4, at
a location upstream of a fishery.
Geologically, the site is located in the Piedmont province, underlain by well-drained soils
with a subsoil of reddish clay, on granite, gneiss, and schist. The weathered material generally
ranges from several feet to several tens of feet. Most ground water occurs at a depth of less than
150 feet, much of it in the upper 30 feet of bedrock. The drinking water supply for the City of
Statesville is obtained from a surface water intake on the South Yadkin River, north of the City.
Many other nearby towns and communities purchase water from the City. All other areas obtain
drinking water from individual wells or community wells. There are seven community wells
within a four mile radius of the Sigmon site. There arc no surface water intakes within the 15
mile surface water pathway downstream of PPE4.
Seven drinking water samples and two monitoring well samples were collected during the
PA/SI sampling investigation in August 1997. Analytical testing revealed elevated
concentrations of barium, chromium, lead, manganese, mercury, chlorobenzcne, 1,4-
dichlorobenzene, and 1,2-dichlorobenzcnc in groundwater, as compared to background levels.
Three residents were advised by the North Carolina Occupational and Environmental
Epidemiology Section not to drink the water from their well.
The property is actively being used for the operation of Sigmon's Environmental
Services, which employs five workers. Work areas include one source area, the soil surrounding
the storage tanks. Other source areas arc not within 200 feet of work areas. Public access is not
limited on the south side of the property, and unauthorized persons have entered the property
with recreational vehicles. Soil exposure is considered a minimal threat.
Based upon the findings of the assessment, it is recommended that the Sigmon's Septic
Tank Service site be the subject of an Expanded Site Inspection (ES!). The primary concerns at
the site are the effect the site has had on drinking water and the apparent migration of
contaminants to surface water pathways that are used for recreational fishing.
.1
'I
I
I
I
I
I
I
I
I
I
I
I.
I
I
I
I
1.
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
combined Preliminary Assessment/Site Inspection (PA/SI) at the Sigmon's Septic Tank
Service site in Statesville, Iredell County, North Carolin~,.,The purpose of this
investigation was to collect information concerning conditions al the site sufficient to
assess the threat posed to human health and the environment and to determine the need
for additional CERCLA/SARA or other appropriate action. The scope of the
investigation included review of available file information, a comprehensive target
survey, and collection of environmental samples (August 25 and 26, 1997).
2.0 SITE DESCRIPTION
2.1 Location
The Sigmon's Septic Tank Service site is located at 1268 Eufola Road,
approximately five miles southwest of Statesville (Fig. I). Site coordinates are 35°43'02"
North latitude and 80°58'20" West longitude as determined by the location of the
northeast corner of the lagoon area (Ref. 1).
The two year, twenty-four hour rainfall for Iredell County averages 3.5 inches
(Ref. 2). Normal annual total precipitation averages 48 inches while mean annual
evaporation is approximately 40 inches, yielding a net mean annual precipitation of 8
inches (Ref. 3).
2.2 Site Description
The property comprises 15.35 acres and is bounded on the north by Eufola Road
and on the south by Lauren Drive (Ref. 4; Fig. I). Land use bordering the property and
within 1/4 mile of the site is rural residential. The property contains three buildings: the
home of Mary Sigmon, a trailer which serves as the office of Sigmon Environmental
Services, and a storage shed (Fig. 2). Although the east, west, and south sides of the
property were fenced at one time, the area is accessible by the public on the east and
south sides ofthe property through breaches in the fence (Ref. 5, Pg. 3; Ref. 6, Pg. I).
2.3 Operational History and Waste Characteristics
The site was first developed in 1970 by Sigmon's Septic Tanks Service, a wholly
owned subsidiary of AAA Enterprises (Ref. 5, Pg. I). The business pumped septic tank
"' UNJTED STATES ;o;~. ",, •," DEPARTMENT OF THE INTERJOR
SU RVEY --~ "'• Rl 'CO'
) • 1,'""'i(r'tT~~~"\:;'"~~f " 1,i ✓ •,y ./\(.\'l ., " ,, ·-·-. •" ,._-~ ~ ~ "' ✓,~ _,
•
Mt ll;mo;
/ O"
/ ' ,-,
.,
:1 'r ,,, __ 'l ·
l ," • . . ' -I~ , .,•
' •
GEOLUGICAL
·1 ' ~',(," 1\\\. <".-
, \ -, 11 /-1 -IJ ' ·' \\", (~. \·, (,', ,:1,, ,/' ~ '. -.. ,__ _ _j_, 1.\\< -~~_,; I ''""' ~ \. -l -
·, '•.
35° 45'
'. .
'"l"""N.
"
"
,,,,
. I .
p'{' . '
G _.
,-, \/ • /
r ~ -,
t
. ' ,,
I '. I' ' '. ,I· . '
"4:
090 Cl
''
STONY
,,a C' "n,-,--,,,
SHINGTON D C 20242 Ls IS A'AII A~l t ()P< ~d JUt ',I
P OINT, N
'
" '· -
C.
• '
• '
• '
• '
• '
• '
--.
Prim er, h15lwa,
hard •llrfc •
~'.cor ,~a:.· h ~1-·m
IU J SIH1 1«'
'
R ul,
\ ;;; ~-.
'"
'°11'"'"'
"'
32
~.
f{,,~
'</t 1 ;
• JJ'" '
TROUTh1AN, NC
35080-rS Tf-024
1993
DM~ 41155 III NW srn1r, VlHZ
Produced by the United States Geologi cal Survey
Compiled by photogrammetnc methods from ,mo~ery dated l 96~
Field checked 1970
Norlh American Datum rJ 1927 {NAO 271 Pm1ect1on and
1 O ODO·locl hc~s Nortll Carolina co0rd1natc svstem
(Lambert conformal corncl
Blue J ODO-meter Universa l Transverse Mercator ticks, rnne l 7
r-:orth American Da•um of 1983 (NAG 831 ,s shm,n by dashed
corner ticks Tr.e val "es nfthe shiil: belwe0n NAO 27 and NAD 83
IOI 7 5-mi '"te 1nl ersect1ons are obtainable from Nal1onal Gaodct1c
Su,vey NADCON aufl,.,re
"' •' 11' Mil.SI lo a,•
I jfl,fr ,,
u,M ,SR O 'ND "" tAsSNETC NOS:.H
DECCNeEf, "cmrrn "' Si[[l
STATE OF NORTH CAROLINA
DEPARTM EN T OF ENVIRONMENT, HEALTH
AND NATURAL RESOURCES
RALEIGH, NO RTH CAROi !NA
ATO\~L GECJCiTIC ,I A l(.'L ' \I IJM 'I 1"1a
Ir I~ M \f' : '~ 'I IFS ,'.ITII :J~ TIC N,-1 WI' ACCUH '" \ 0 h N~_,~-.;
FDR SALE BYUS GEOLOGICAL SURVEY
DENVER COLORADO 8022 5, OR RESTON VIRGINIA 220<2
A FOLCER DESCR13,NG TOPOGRAPHJC MAPS AND SYMBOLS IS AVAIi Am ,o~ .1EOIJF.ST
0
STATESVILLE WEST QUADRANGLE
NORTH CAROLlNA -IREDELL CO.
? 5 MINUTE SE RJES (TOPOGRAPHIC)
STATESVILLE WEST, NC
3508 0-Gl>-TF-024
1993
L>MA 4815 lY lW-SCR!lO V842
Fi1,,'llre 1
T opogrnphic Quadran~le 11fap
Sigmon's Septic Tank Service
Stutcs,ille, Iredell County, NC
LIS EPA JD: NCO 062 555 7<)2
State animal special concern:
•• Higl1fm Carpsucker
State Designated i\"aturnlArca
Identified Natural Arca:
Duke Po.,,er State Park
Deep River -Pattcnon Creek Slope
\Yater Supplies:
-
\\c~t Ir1cdcll \\later Co.
Timbcrbrouk Subdivision (Piedmont Construction & \Yater
Com pan)
City ofTroutrnan
0rirn 11' ill0i,.,_,
l,a,cl curt -c
>cood"' n1gr,;,aJ'
1 ,r~ surr ",
,'U>L' CL,1,SIFICfTION
1wtn•,t1 ,,ac 1,,, 1 "'
1me'o,e ,u,r ,e
-11, 1°Llal" ~, .. ule f
',
1 '"''""" ), '" Re,is1ans shewn ,n purple comp,lcd 1n Cloocrot1oa .~,Th
Nmta Car~lin~ Department of Env1rJnmen1, Keal·r, an1
NJlural ResourcCo fr urri ,rpag,'1)' Gate d l 993 and otller scurces
•~aped led l 9%
lntmmatrn sll:),, 1 ,n f r•rplo ""' <HJI nrr CL USGS con e,11
standards ar d rn ay cvn'I ct w,th prev1cuJy ma~ped ccnt,urs
LAKE NORMAN NORTH, NC
3503:J,-ES TF 024
1993
'"
'
3("
,1
D
u-
D
D
0
0
0
D
D
0
D
E
' D I
0
0
D
D
D
D I
Fig. No: 2
North Carolina
Division of
"--~ Eufola Road
---------Sigmon home ~
Manmadc pond D
Office trailer
I
Storage Tanks -•~ L •-· Storage shed
/~: ~ / ' . h (_ ~?stc Pile
, ·"-_/ I
' Lagoon area
I "'~
(;"~ Open Pits ii I and i/2
Lauren Drive
Title: Site Characteristics
Waste Management Scale: l" = 1.90' Date: September
1998
Drawn By:
Superfund Section Site Name Sigmon's Septic Tank Service NCD 052 555 792
I
I
I
I
I
I
I
I
I
I
I
I i
wastes and heavy sludges from residential, commercial and industrial customers, installed
and repaired septic tanks, and provided a variety of waste removal services to various
industries (Ref. 7). The company was owned and operated by Henry Sigmon and his
children (Ref. 8). From I 970 to 1978, the wastewaters were discharged to the City of
Statesville sewer. Around 1973 and 1974, the sludges were land applied to area
farmlands (Ref. 5, Pg. I).
From 1978 to 1992, Sigmon's Septic Tank Service disposed of the septic wastes in
ten unlined lagoons on the 15 acre facility property (Ref. 5, Pg. 1-2). The wastes were
described as septage, grease, and milky white liquid (Ref. 9). No permits were issued for
the lagoons. Mr. Sigmon contended that he had received verbal permission from the
Iredell County Health Department and from representatives of the North Carolina
Division of Environmental Management, Mooresville Regional Office (Ref. 5, Pg. I).
Information in the North Carolina Superfund files indicates that this site first
received attention in June 1980 by the North Carolina Department of Human Resources,
Division of Health Services. A meeting/inspection was held at the site with the Iredell
County Health Depm1m~nt and the North Carolina Department of Natural Resources and
Community Development (NRCD), primarily to investigate the septage disposal
problems of the area (Ref. 9). Temporary groundwater wells were installed in September
1980 by the North Carolina Department of Natural Resources and Community
Development, Division of Environmental Management (DEM) in response to a request
by OHR. Samples were analyzed for alkalinity, bicarbonate, carbonate, chloride,
dissolved solids, hardness, and pH. (Ref. 10). Analytical results are presented in Table I.
Well locations are shown on Figure 7.
In November 1980, Mr. Sigmon submitted an interim status hazardous waste
permit application (EPA Part A) indicating that the site was used for the disposal of
hazardous waste. The site was assigned an EPA identification number of NCO 062 555
792. In June I 98 I, Mary Sigmon, daughter of Henry Sigmon, requested that the
hazardous waste permit application be withdrawn because they were no longer
transporting hazardous waste. In April I 982, Mary Sigmon requested that the facility be
re-classified as a transporter of hazardous waste (Ref. 11 ).
In 1985 or 1986, two of the lagoons (#8 and #9) were apparently covered and
closed out (Ref. 13).
In 1987, four additional temporary monitoring wells were installed and sampled
by DEM (MW\, MW2, MW3, and MW4). Analytical results indicated elevated levels of
nitrates, barium, chromium, copper, iron, mercury, manganese, and lead above EPA
Drinking Water MCLs or North Carolina Groundwater Standards. A lagoon sample was
also collectecl and analyzed (Refs. 12; 14; 15; Fig. 8; Table 11). Additional information
4
-I!!!!!!!!!! :-~ l!!!!!!!!!I l!!!!!!!!!I l!!!!!!!!!I l!!!!!!!!!I l!!!!!!!!!I l!!!!!!I l!!!!!!!!!I I!!!!!!!!-I!!!!!!!! l!!!!!!!!!I ~ ~ ~ I:=:!
Table 1
GROUNDWATER SAMPLE ANALYTICAL DATA SUMMARY
North Carolina Dept. of Natural Resources and Community Development
Division of Environmental Management (DEM)
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Date September 10, 1980
MW1 MW2 MW3 MW4 MW5 MW6 MW7 MW8
pH 6.2 5.2 4.8 4.9 4.8 4 5.9 6.7
Specific conductivity
(umhos) 70 180 350 190 60 80 850 1100
Dissolved solids (mg/I) 184 133 315 173 59 67 817 733
Bicarbonate (mg/I) 18 4 2 2 2 <1 68 756
Chloride (mg/I) 2 4 5 3 2 4· 13 64
Hardness, as CaCO3
(mg/I) 14 72 140 73 28 33 460 380
Hardness, non
carbonate (mg/I) 1 69 139 71 26 33 400 <1
I:=:!
MW9
6.7
400
343
214
10
220
49
I
I
I
' I
I
I
I
I
I
I
I
regarding historical groundwater monitoring is presented in Section 4.2.
Beginning in 1991 and continuing to the present, groundwater samples have been
collected by DEM from nearby drinking water wells. Analysis has revealed elevated
levels of metals and organics (Refs. 35; 36; 37; 38; 39). Additional information regarding
historical groundwater monitoring is presented in Section 4.2.
Since 1989, Sigmon's Septic Tank Service and Sigmon's Environmental Services
have submitted applications and have received permits from the North Carolina Septage
Management Program to operate a Septage Management Firm and a Septage Disposal
Site. The permit states that pumpings may only be discharged at specified wastewater
treatment plants (Ref. 16).
In June 1990, DEM analyzed samples from MW3 and MW4 and detected elevated
levels of iron, lead, manganese, and mercury above the North Carolina Groundwater
Standards. On August 9, 1990, DEM notified Sigmon's Septic Tank Service of a notice
of violation regarding the groundwater contaminant levels. Sigmon's was required to
submit a site assessment report and required to install two new monitoring wells :o
replace MW! and MW2, which had been damaged. In late 1990, two new wells, MWIA
and MW2A, were installed in the same vicinity as the original wells (Refs. 12; 17; Fig. 8;
Tables 11; 12). Additional information regarding historical groundwater monitoring is
presented in Section 4.2.
In September 1990, the DEM referred the site to the North Carolina Hazardous
Waste Section, based on the results of the lagoon sample in 1987 (Ref. 18).
On August 31 and September I, 1992, after discussions with DEM, the North
Carolina Hazardous Waste Section conducted a site investigation and sampling trip at the
Sigmon's site to determine if the waste in the lagoons was hazardous. Water samples
were collected from each of the eight remaining lagoons, and sludge samples were
collected from five lagoons. Drinking water samples were also collected from three
nearby homes. Analytical results indicated detectable or elevated levels of 7 metals and
13 volatile organic compounds in the aqueous samples, and 4 metals and 18 volatile
organic compounds in the sludge samples. All levels were below the RCRA TCLP levels
for toxicity characteristic. Following the investigation, the Hazardous Waste Section
determined that because the chemical constituents of the lagoons did not meet the
definition of a hazardous waste, the site did not fall under its jurisdiction, and the site was
referred to the North Carolina Solid Waste Section for evaluation (Refs. 13; 19; Fig. 3;
Tables 3; 4). Additional information regarding this investigation is presented in Section
3.0.2.
On May 5, 1993, DEM analyzed samples from two monitoring wells and noted
6
D
D
I
I
I
I
I
I
I
I
I
I
I
I
elevated levels of mercury, lead, 2-chlorotoluene, benzene, 1,3,5-trimethylbenzene, n-
butylbenzene, and naphthalene above the North Carolina groundwater standards (Ref.
12) .. Sigmon's was ordered by DEM to supply an alternate drinking water supply for two
residents that live 400 to 450 feet southwest of the lagoon area (Ref. 20). Sigmon's
complied with the order for approximately a year (Ref. 21)
In September 1993, AAA Enterprises employed a consulting firm, Shield
Environmental Associates, to analyze samples from the lagoons. Laboratory results
indicated the sludges exhibited elevated levels of total petroleum hydrocarbons (TPI-I),
metals, and several volatile organic compounds (Ref. 22). Additional information
regarding this investigation is presented in Section 3.0.3.
In 1995, DEM required the closure of the lagoons. The lagoon sludges were
excavated to a depth of IO feet, mixed with sawdust, and piled onsite in the lagoon area,
in the vicinity of lagoon #3. The lagoons were filled with soil excavated from an area
north of the iagoons on the facility property (Refs. 5; 21; 23)
In December 1995, the site was referred to the rforth Caro!ina Superfund Section
by DEM regarding the possibility of an emergency removal determination for the waste
pile. Land application of the sludge was considered but sufficient acreage (90 acres) was
not available (Ref. 24).
In January 1996, Mary Sigmon, daughkr of Henry Sigmon, formed Sigmon
Environmental Services (SES), which is currently active on the facility property (Ref. 5).
Both Sigmon's Septic Tank Service and it's parent company, AAA Enterprises, ceased
operations for financial reasons in September 1995 (Ref. 25). SES was permitted in
December 1995 as a septage management firm by the North Carolina S01id Waste Section
to discharge septage to a nearby wastewater treatment plant (Ref. 16).
In December 1996, the site was added to the CERCLIS database for further
investigation (Ref. 26). In January 1997, the North Carolina Superfund Section referred
the site to the EPA Emergency Response and Removal Branch for removal evaluation.
EPA responded in April 1997 indicating that the site did not meet the criteria for removal
eligibility (Ref. 27).
Sigmon's Environmental Services is currently active on the property. Septic
wastes are temporarily stored in four cylindrical tanks on the property, and the sludges arc
periodically removed and transported to a wastewater treatment plant for disposal. The
property contains one house, which is occupied by Mary Sigmon and her son, a trailer
which serves as the office for the business, and a shed. Drinking water for her home and
the business office is obtained from a drinking water well onsite (Ref. 6).
7
I I
I
u
0
E
I
I
I
I
I
I
I
I
I
I
I
I
I
3.0 WASTE/SOURCE SAMPLING
To date, four source areas have been identified at the site:
1. The former lagoon area, located within the southern portion of the property,
contained 10 active lagoons used for discharge of septic pumpings. Each lagoon
was approximately 20 feet by 100 feet, and 10 feet deep. The lagoon area has
been estimated at 52,700 square feet (Refs. 5; 7; Figs. 3; 4). Two of the lagoons
(#8 and #9) were covered and closed out in 1985 or 1986 (Ref. 13). In 1995, the
sludge in the remaining eight lagoons was excavated, and the lagoons were
reportedly filled with clean soil from onsite (Refs. 5; 23). Although all of the
sludge was supposed to have been removed in the eight remaining lagoons, the
PA/SI investigation revealed the presence of sludges below the fill material in at
least one lagoon. (Refs. 28; Fig. 2; Photos).
2. The waste pile is located on top of the former lagoon area. The sludges removed
from the lagoons in 1 \195 were mixed with sawdust and reportedly placed over
filled lagoo,, #3 (Refa. 21; 23) The estimated volume of the waste pile is 2705
cubic yards or 2705 tons. (Refs. 5; Fig. 2).
3. The storage tank area is located on the west side of the entrance road to the site,
south of the office trailer and north of the lagoon area. There are four above
ground tanks, positioned horizontally. The diameter of each tank is IO feet, and
the length is approximately 20 to 25 feet. The tanks are being actively used by
Sigmon Environmental Services to store septic pumpings. When the tanks are
full, the contents are pumped into transfer vehicles and transported to a
wastewater treatment plant. The fill ports arc located on the top edge of the tanks,
nearest the facility rosd (Ref. 6; Fig. 2).
4. The open pits are located in the extreme southeast corner of the property,
surrounded by dense, tall vegetation. Open pit# I is oriented 40° east of north.
The pit is approximately 15 feet deep, 12 feet wide, and 40 feet long. Open pit #2,
is oriented north-south and is approximately IO feet wide and 20 feet long (Ref.
28; 29; Fig. 2). The pits contain no visibly discolored soil, and do not appear to
be used for any purpose. The owner of the active business on the property, Mary
Sigmon, could provide no information regarding the pits. Access to the pits is
difficult because of the dense vegetation (Ref. 6; 29).
3.0.1. Previous Sampling -March 1987
Three sampling investigations were conducted at the Sigmon Septic Tank site
8
I
I
I
0
I
I
I
I
I
I
I
Note: Lagoons 8 and 9 were
closed in 1985 or 1986.
/
Lagoon orientation and size based
on Shield Environmental Associates
Rcpo,1, November 1993.
Fig. No: 3 Title: Lagoon Layout -1992 Sampling
-North Carolina
Division of
Waste Management Scale: l''
North Carolina Hazardous Waste Section
65' Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
I
I
I
I
I
I
I
I
I
I
I
\
I
I
/
Fig. No: 4
North Carolina
Division of
/
Title: Lagoon Layout -Shield Environmental Associates
Sampling, September 1993
Waste Manaqement Scale: l" ~ 65' Date: September Drawn By:
I 1 g 9R Donn;a Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
m:
i ,
R:
I
/
O:
f
ui l I ' 1;
I
I Ii
I
I
\
I l
i
', ' I i
I
I
I !
I
I
I
I
' I
I
I
I
I ' I
I
I
prior to the PNSI investigation. The first was on March 3, 1987, conducted by the North
Carolina Division of Environmental Management (DEM). An aqueous lagoon sample
was analyzed, which detected elevated levels of aluminum, copper, iron, mercury,
magnesium, manganese, lead, and zinc, as shown below in Table 2. An organics scan
revealed 41 peaks by GC/MS for a total estimated concentration of 1500 ug/1 organics
(Ref. 15).
Arsenic
Table 2
Analytical Data Summary
Aqueous lagoon sample
March 3, 1987
mg/I
0.036
Aluminum 14
Copper 0.35
Iron 11
Mercury 0.0008
Magnesium 3.7
Manganese 0.35
Lead 0.05
Zinc 2.3
Ref 15
3.0.2. Previous Sampling -August andSeptcmber 1992
On August 31 and September 1, 1992, the-North Carolina Hazardous Waste
Section sampled liquid and sludge from the eight active lagoons. Analytical results
indicated detectable or elevated levels of 7 metals and 13 volatile organic compounds in
the aqueous samples, and 4 metals and 18 volatile organic compounds in the sludge
samples, as shown on Tables 3 and 4. The numbering of the lagoons, for purposes of
sample identification, is shown on Figure 3. All levels were below the RCRA TCLP
levels for toxicity characteristic (Ref. 19).
3.0.3. Previous Sampling -September 1993
In September 1993, Mr. Sigmon contracted with Shield Environmental
Associates, Inc. of Charlotte to collect sludge samples from the eight lagoons, as
I I
------
Arsenic (ppm)
Barium
Cadmium
Chloride
Chromium
Ccpper
Lead
Manganese
Mercury
Nitrate-
Selenium
Stiver
Sulfates
Zinc
pH
Conductivity (umhos)
TCLP barium (mg/I)
Nt, -Not analyzed.
- -
Water Water
Sample -Sample
P1-W P2-W
--l!!!!!I
Table 3
SEDIMENT/SURFACE WATER SAMPLE ANALYTICAL DATA SUMMARY
North Carolina Hazardous Waste Section
Water
Sample
P3-W
lnorganics Analysis
Sigmon's Septic Tank Service NC l) 0G: 555 792
Sampling Dates August 31 and September 1, 1992
Water Water Water Water Water
Sample Sample Sample Sample Sample
P4-W P5-W P6-W P7-W P10-W
Sludge
Sample
P2-S
Lagoon 1 Lagoon 2 Lagoon 3 Lagoon 4 Lagoon 5 Lagoon 6 Lagoon 7 Lagoon Lagoon 2
SE corner NW of 1 NW of 2 NWof3 NWof4 NW of 5 NWof6 W of 1 -4
<15 <0.04 <0.04 <0.04 <0.04 <15 <0.04 <0.04 <7.8
<15 0.88 3.58 0.42 0.26 <15 0.05 0.1 80
<31 0.021 0.131 <0.016 <0.016 <31 <0.016 <0.016 <16
NA NA 44 29 13 NA 15 21 NA
<38 0.19 0.25 <0.04 <0.04 <38 <0.04 <0.04 49
NA NA 1.5 0.28 0.17 NA <0.05 <0.05 NA
<38 2.3 2.69 0.088 0.104 <38 <0.04 <0.04 200
NA NA 13.3 1 74 0.46 NA 0.27 1.05 NA
<0.09 <0.0002 <0.0002 ·<0.0002· <0.0002 <0.09 <0.0002 <0.0002 0.29 -
NA NA <1 <1 <1 NA <0.0002 <1 NA
<15 <0.04 <0.04 <0.04 <0.04 <15 <0.04 <0.04 <7.8
<38 <0.05 <0.05 _<0.05 <0.05 <38 <0.05 <0.05 <20
NA NA <60 <12 3 NA <6 <6 NA
NA NA 24.47 1.08 0.9 NA <0.05 0.05 NA
NA NA 5.3 6.9 6.4 NA 7 6.9 NA
NA NA 5000 1320 760 NA 465 1060 NA
---. ----0.34
~ ==
Sludge Sludge Sludge Sludge
Sample Sample Sample Sample
P3-S P4-S P5-S P6-S
Lagoon 3 Lagoon 4 Lagoon 5 Lagoon 6
<7.8 <7.8 <7.8 <7.8
110 51 100 43
<16 <16 <16 <16
NA NA NA NA
51 <20 21 <20
NA NA NA NA
20 <20 61 21
NA NA-1--NA ... NA -
0.15 0.1 0.14 0.15
NA NA NA NA
<7.8 <7.8 <7.8 <7.8
<20 <20 <20 <20
NA NA NA NA
NA NA NA NA
NA NA NA NA
NA NA NA NA
0.32 0.38 0.49 0.3
--- --- -
l!!!!!!!!I l!!!!!!!I
~-------------" ----....,
Table 4
SEDIMENT/SURFACE WATER SAMPLE ANALYTICAL DATA SUMMARY
North Carolina Hazardous Waste Section
Water Water
Sample Sample
P1-W P2-W
Lagoon 1 Lagoon 2
SE corner NW of 1
Acetone (ppm) 1.273 u
Benzene u 0.033
2-butanone u u
Bis(2-ethylhexyl) ·phthalate 360 u
Carbondisulfide u u
Chlorobenzene u 0.148
Dibutyl phthalate 11 u
1, 2-dichlorobenzene u u
1, 3-dichlorobenzene u u
1, 4-dichlorobenzene u u
Ethylbenzene -u u
2-methylnaphthalene 1 u
2-methylphenol u u
4-methylphenol 6 u
Methyl-I-butyl ether u u
Methylene chloride u u
Napthalene u u
Phenol 7 u
Toluene 0.409 1.277
1, 2-trans-dichloroethene u u
Xylenes (total) u 0.051
(mg/I)
TCLP benzene --
TCLP chlorobenzene --
TCLP chloroform --
TCLP methyl ethyl ketone --
U -Material analyzed for but not detected.
J -Estimated value.
B -Present in blank as_ background.
Water
Sample
P3-W
Lagoon 3
NW of 2
0.37
trace
0.735
u
u
u
u
u
u
.U -
u
u
u
u
u
0.019
u
u
0.119
u
0.01
-
-
-
-
Volatile Organics Analysis
_:'1igrrion's Septic Tank SeJVice NCO 062 555 792
Sampling Date August 31 and September 1, 1992
Water Water Water Water Water
Sample Sample Sample Sample Sample
P4-W P5-W P6-W P7-W P10-W
Lagoon 4 Lagoon 5 Lagoon 6 Lagoon 7 Lagoon
NW of 3 NW of 4 NW of 5 NWof6 Wof 1 -4
0.392 u u u u
u 0.006 u u u
0.275 u u u u
u u 180 u 1
u u u u u
0.011 0.014 u u u
u 6 2 u 3
u u u u u
u u u u u
u u -u u u
0.004J u u u u
u u u u u
u u u u u
u u u u u
u 0.005 u u u
u 0.013 u u u
u u u u u
u u u u u
0.208 0.029 trace u 0.067
u u u u u
u u u u u
-----
-----
-----
-----
Sludge
Sample
P2-S
Lagoon 2
0.624
0.036
u
4
0.018
0.057
0.5
u
u
u
0.288
u
u
u
u
u
u
u
6.03
u
1.155
0.003 J
0.021
0.009 8
u
Sludge Sludge
Sample Sample
P3-S P4-S
Lagoon 3 Lagoon 4
0.406 u
0.008J u
u u
63 5
u u
0.028 0.255
2 u
0.2 u
u --u
0.1 7
0.248 0.21
9 u
1 u
12 13
u u
0.194 0.052
4 u
u u
0.711 4.257
u u
0.641 0.611
trace trace
u 0.003 J,B
0.005 8 0.009 8
0.066 0.036
-~ ._ Jiiii ____ _
Sludge Sludge
Sample Sample
P5-S P6-S
Lagoon 5 Lagoon 6
u u
0.07 u
u u
90 70
u u
2.5 u
8 7.5
0.2 u
0.1 · --u
1 1
0.206 u
3 0.2
u u
u 25.5
u u
u 0.156
2 0.1
u u
16.5 J 2.45
u 0.094
0.693 0.05
0.004 J u
0.012 u
0.003 J,8 0.003 J,8
u 0.015
I
i
i\ I
I
Ul
I
I
Ul '
I
m;
I:
I I:.
t
I
1: . I
I
I
I
I
I
I
I
I
I
I
I
. ' !
I
l
\
I
I
I I I
'i'
I
requested by the North Garolina Hazardous Waste Section. The sampling locations are
shown on Figure 4. It should be noted that the numbering of the lagoons for the Shields
investigation differs from the numbering of the lagoons by NRCD and DEM. Eight
sludge samples were analyzed for TCLP metals, ,which revealed no levels above
regulatory limits. The sludge samples were also .evaluated for volatile organics and total
petroleum hydrocarbons. Analytical results revealed detectable levels of toluene, xylenes,
carbon disulfide, 1,4-dichlorobenzene, ethylbenzene, and chlorobenzene, as well as
elevated levels of total petroleum hydrocarbons. Results are summarized in Tables 5, 6,
and 7 (Ref. 22).
3.1 Waste/Source Sample Locations :
Sampling for the PA/SJ was conducted by the North Carolina Superfund Section
on August 25 and 26, 1997. Sampling locations included the former lagoon area, the
waste pile, the area surrounding the active storage tanks, and the two open pits. Sampling
locations are illustrated on Figure 5. All samples were delivered to the State Laboratory
of Public Health for analysis of volatile and semi0 volatile organics, inorganics, and
polychlorinated biphenyls (PCBs) (Ref. 28; App. :A).
3.1.1 Lagoon Area -Sample Locations
Soil samples SS-21-WS, SS-22-WS, and SS-35-WS were collected from the
lagoon area below the fill material. The lagoon area was covered with a dense layer of
dead vegetation. South of the waste pile, the outline of some of the lagoons could be seen
from the edges of the lagoon berms. A Little Beaver power auger was used to auger
through the soil material to depths of 5.5 to 12 feet. No sample was obtained from laguon
#2, as originally planned (Ref. 56). Three holes were attempted ir, lagoon #2, but an
impenet!'able substance (most likely saprolite) was encountered at a depth of 8.5 feet. ft
appears that all of the sludge in lagoon #2 was ren1oved (Ref. 28).
At lagoon #3, the first augered hole ended in an impenetrable substance al a depth
of seven feet. The auger was moved 10 feel away and saprolitc was encountered at a
depth of5 feet. Sample SS-21-WS was collected from the grey saprolite obtained from
the second augered hole (Ref. 28, Photos).
At lagoon #5, a very odorous black-brown sludge was encountered at a depth of
10 to 11 feet. Sample SS-35-WS was taken of the sludge. At a depth of 12 feet within
the same hole, an odorous gray saprolite mixed with brown sludge was encountered.
Sample SS-22-WS was collected of the saprolite/sludge material (Ref. 28, Photos).
14
-!Ill -
Lagoon Depth Arsenic
sample (ft) 1
(mg/LI
1 8 <0.007
2 5-10 0.011
3 4-5 <0.007
~ liiiml . -------------,-
Table 5
Lagoon Sludge Sample Analytical Data Summary
Shield Environmental Associates, Inc.
TCLP RCRA Metals
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Date September 21, 1993
Barium Cadmium Chromium Lead Mercury
(mg/LI (mg/LI (mg/LI (mg/LI (mg/LI
' 2.464 0.052 0.27 0.018 <0.0002
1.114 0.024 <0.005 0.235 <0.0002
0.614 0.015 <0.005 0.031 <0.0002
Selenium
(mg/LI
<0.007
<0.007
<0.007
•
Silver
(mg/LI
<0.005
<0.010-
<0.010 -----. --
<0.010 ·/ 4 3-4 -0:014 · 0.875 0.012. -<0.005 0.045 <0.0002 <0.007 -
5 5-8 0.015 0.698 0.012 <0.005 0.156 <0.0002 <0.007 <0.010
6 5-6 <0.007 1.569 0.029 <0.005 0.208 <0.0002 <0.007 <0.010
7 8 <0.007 1.248 0.040 <0.005 0.071 <0.0002 <0.007 <0.010
8 3 <0.007 0.794 0.019 <0.005 0.017 <0.0002 <0.007 <0.005
TCLP -5.0 100.0 1.0 5.0 5.0 0.2 1.0 5.0
Regulatory
Limit2
Ref. 22
1Depth is below the sludge sur~ace.
'TCLP -Toxicity Characteristic Leaching Procedure as outlined in NCAC Title 15A, Chapter 13A, Appendix II, Method 1311.
Analytical laboratory: Hydrologic, Inc., Frankfort, Kentucky
- - -- --
Sample Lagoon Depth
(ft) 1
1A-8 1 8
1 S-8 1 8
1C-8 1 8
2A-5 2 5
28-8 2 8
2C-10 2 10
3A-4 3 4
3S-5 3 5
3C-5 3 5
4A-3 -. 4 --3
4S-8 4 4
4C-4 4 4
5A-5 5 5
5S-8 5 8
5C-6 5 6
6A-6 6 6
GS-6 6 6
6C-5 6 5
7A-8 7 8
7S-8 7 8
#8-3 8 3
Ref. 22
BDL -Below Detection Limit
--!!!!!!!I ==
Table 6
Lagoon Sludge Sample Analytical Data Summary
Shield Environmental Associates, Inc.
Volatile Organic Compounds, SW-846 Method 8240
Sigmon's Septic Tank Service NCD 062 555 792
Sampling Date September 21, 1993
Carbon 1,4-
Toluene Xylenes Disulfide Dichlorobenzene
{mg/kg) (mg/kg) (rng/kg) (mg/kgl
0.6 2 BDL SDL BDL.
0.112 SDL SDL SOL
0.092 SDL 0.0062 SDL
8.0 1.4 SOL 1 . 1
15.0 1.6 1.1 15.0
23 2.8 SOL 4.8
20 1.5 SOL 2.9
1.9 2.7 SOL 2.4
2.0 5.7 SOL 10.9
3.8 5.8 SOL 47.0
7.8 2.4 SOL 14.8
8 SOL SOL 15
2.2 SOL SOL 9.8
2.6 1.4 SOL 75
2.8 1.4 SOL 33. 7
12.5 SOL SOL 10
9 SOL SOL 5.5
45 4.5 SOL 7.5
7 SOL SOL SOL
1.8 SOL SDL 1.4
SOL SOL BDL SOL
Ethylbenzene
(mg/kgl
SDL
SOL
SDL
SOL
' SOL
0.6
SOL
0.5
1.1
SOL
SOL
SOL
SOL
SOL
SOL
SOL
SOL
SOL
SOL
SOL
SDL
-
1 Depth below sludge surface.
i:;;;;;i
Total
Chiaro benzene Volatile
(mg/kg) Organics
(mg/kg)
SDL 0.62
SDL 0.11 2
SOL 0.0962
SOL 10.5
SOL 32.7
SOL 31.2
1 .3 25.7
3.5 11 --1:6 -21.3
18.0 74.6
SOL 25
SOL 23
SOL 12
10.4 89.4
22.8 60.7
SOL 22.5
SOL 14.5
SOL 57
SOL 7
1.0 4.2
SDL SOL
Analytical laboratory: Hydrologic, Inc., Frankfort, Kentucky
2 Sample exhibited very low solids content and was ana.lyzed as a
liquid. Sample result units are mg/L.
i
I
I
g
D
I
I
I
I
I
I
I
Table 7
Lagoon Sludge Sample Arrnlytical Data Summary
Shield Environmental Associates, Inc.
Total Petroleum Hydrocarbon Compounds, SW-846 Extraction Methods 355_0 & 5030
Sigmon's Septic Tank Service NCD 062 555 792
Sampling Date September 21, I 993
'
Gasoline
Sample Lagoon Depth 1 Diesel Range Range
Number TPH TPH
(ft) . (mg/kg) (mg/kg)
IA-8 I 8 > 6.422 BDL
I B-8 I 8 2.072 BDL
IC-8 I 8 7.062 BDL
2A-5 2 5 1,080 BDL
28-8 2 8 552 BDL
2C-I0 2 10 .1,410 BDL
3A-4 3 4 2,950 BDL :
38-5 3 5 129 24
3C-5 3 5 I 13 35
4A-3 4 3 262 59
48-8 4 8 209 81
4C-4 4 4 221 BDL
5A-5 5 5 1,000 BDL
513-8 5 8 ' 565 BDL
5C-6 5 6 ' 600 27
6A-6 6 6 1,950 BDL
68-6 6 6 555 BDL
6C-5 6 5 ' 439 BDL
7A-8 7 8 : 206 BDL
713-8 7 8 348 BDL
#8-3 8 3 . ,13DL BDL
Ref. 22
1 I)cpth below sludge surface.
2 Sample exhibited very low solids content and was analyzed as a liquid. Sample result units ar mg/L.
BDL -Below Detection Limit I Analytical Laboratory: Hydrologic, Inc., Frankfort, Kentucky
' I
I
Total
TPH
(mg/kg)
6.422
2.072
7.062
1,080
552
1,410
2,950
153
148
321
290
221
1,000
565
627
1,950
555
439
206
348
BDL
:.1
I
I
I
I
D
0
D
D
I
I
I
-?-. •
•
•
SS-34-PW
.Tenney/Frye we!! _b}'-.
\J
A -SS-26-SL . \
ss.2s-SL ?'8!ie.J--H-' SS-27-SL
\ J I ..
~
SS-33-PW
John Lamberth well
LAGOON AREA
SS-05-GW
SS-13-SL
t
Fig. No: 5
North Carolina
Division of
SEPTIC WASTE
STORAGE TANKS
SS-23-SL
-SS-24-SL
SS-25-SL
SS-125-SL
,& SS-01-PW
SS-18-SL --..._ Davidson well
_____ .--DRAINAGEDITCH----,_ Ir \
SS-19-SL -■ 1111 • "'-""
~~~~~~_,'l>!~~-~
Title: PA/SI Sampli0g Locations
August 1997
Waste Management Scale: l" 275 1 Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
I
I(
I
I
I
I
I
g
D
0
E
E
I
I
I
I
,I.
\.__ I
I
I
Fig. No: 6
North Carolina
Division of
Title: PA/SI Sampling Locations
August 1997
Waste Management Scale: 1'' = 1820' Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
I
I
I
I
I
I
I
I
n
0
D
D
D
I
3.1.2 Waste Pile -Sample Locations ,
Soil samples SS-23-SL, SS-24-SL, SS-25-SL, and duplicate SS-125-SL were
collected from the waste pile. The waste pile was approximately 20 feet high and covered
with dense vegetation. Sample SS-23-SL was collected from the waste pile at a depth of
approximately 9 to 18 inches. The sample location was on the north side, at a height of
approximately 6 feet above ground. The sample was dark brown fine grain material and
odorous (Ref. 28, Photos). '
Sample SS-25-SL and duplicate sample SS-125-SL were collected from the waste
pile at a depth of 3 feet. The sample location vjas on the top of the pile. No odor was
noted (Ref. 28, Photos).
Sample SS-24-SL was collected from the waste pile at a depth of 2 feet. The
sample location was on the west side of the pile, at a height of approximately 10 feet
above ground. The sample was brown fine grain material with red clay. No odor was
noted (Ref. 28, Photos).
3.1.3 Storage Tanks•· Sampl::c Locations
Soil samples SS-26-SL, SS-27-SL, and SS-28-SL were collected from the area
surrounding the above ground storage tanks. There are four tanks, positioned
horizontally. The diameter of the tanks is IO feet, and the length is approximately 20 to
25 feet. Sample SS-26-SL was collected by the third tank from the north, on the east side
(nearest the fill port), al a depth of 2 to 6 inches, The soil was poorly sorted black-brown
sand and was very odorous (Ref. 28; Photos).
Sample SS-27-SL was collected by the fourth tank from the north, on the east side
(nearest the fill port), at a depth of 2 to 6 inches. The soil was light brown medium sand
and was very odorous (Ref. 28; Photos).
Sample SS-28-SL was collected on the downgradient (west) side of the tanks at a
depth of 3 feet, in order to detect evidence of leakage from the tanks. The sample was
collected next to the third tank, approximately 51 feet from the tank. The soil was red
sandy clay (Ref. 28; Photos).
3.1.4 Open Pits -Sample Locations
Soil samples SS-18-SL and SS-19-SL were collected from two open pits located
in the extreme southeast corner of the property, surrounded by dense, tall vegetation.
Sample SS-18-SL was taken from open pit #1, which was oriented 40° east of north. The
pit is approximately 15 feet deep, 12 feet wide, and 40 feet long. No water was present in
20
I
I
I
I
I
D
D
E
I
I
I
I
I
I
I
I
the pit. The soil sample was red clay that exhibited no odor or discoloration (Ref. 28; ,.
Photos).
Sample SS-19-SL was collected from open pit #2, which was oriented north-south
and was located in the extreme southeast cornet of the site. The pit was approximately 10
feet wide and 20 feet long. The soil sample eo\1sisted of stiff red clay that exhibited no
odor or discoloration (Ref. 28).
. '\ 3.1.5 Background -Sample Locations
Background soil samples SS-29-SL, SS-30-SL, and SS-31-SL were collected from
the Sigmon property in front of Mary Sigmon's home, approximately 20 feet from Eufola
Road on the crest of a slight hill, and approximately 65 feet west of the Sigmon entrance.
The ground cover was grassy. Sample SS-29-S.L was collected from a depth of2 inches
to 2 feet. The sample consisted of red clay (Ref. 28; Photos).
Augering with the Little Beaver power auger commenced over the same location
to a depth of3.5 to 4 feet. Sample SS-30-SL, consisting of red clay, was collected at this
int.:rval (Ref. 28; Photos).
Augering continued within the same hole to a depth of 12 feet. Sample SS-31-SL,
consisting of red weathered saprolite with clumps of yellow and black, was collected at
this interval (Ref. 28; Photos).
3.2 Waste/Source Sample Analytical Results
3.2.1 Analytical Results -Lagoon Area
Sampling results are summarized in Tables 8 and 9.
Compared to the background soil sample ,(SS-30-SL), sample SS-21-WS showed
an elevated concentration of one parameter, barium. Sample SS-21-WS was collected at
a depth of 5.5 feet from lagoon #3, and consisted of light grey saprolite. The comparable
background sample, SS-30-SL, was collected at a depth of 42 to 48 inches (Ref. 28; App.
A).
Compared to the background soil sample (SS-31-SL), samples SS-22-WS and SS-
35-WS, showed elevated concentrations of barium, lead, toluene, chlorobcnzene, ethyl
benzene, xylcnes, 1,4-dichlorobenzene, 1,2-dichlorobenzene, fluoranthene, bis(2-
cthylhexyl) phthalate, and 4-methylphenol (p-cresol). Sample SS-35-WS also showed
elevated levels of chromium, mercury, 2-butanone (MEK), 2-hexanone, naphthalene,
phenanthrene, anthracene, pyrene, and 2-methylphenol, as compared with the
21
------l!!!!!!!lr l!!!!!!!I, !!!!!!I l!l!!!!il ;;;:; liiiiil iiii liiilll -- -
fable 8
SOURCE ANAL YT I CAL DAT A SUMMARY
Metals and Volatile Organics Analysis
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Dates August 25 and 26, 1997
Open Pits Lagoon Area Waste Pile Storage Tank Soil
SS-18-Sl SS-19--SL SS-21-\f\lS SS-22-1/>JS SS-35-WS SS-23+WS SS-24-v\lS SS-25-WS
Sludge,
Sludge/soil, Sludge/soil, lagoon #5,
Open pit #1, Open pit#2, lagoon #3. lagoon #5, Depth 10-11 Sludge pile, Sludge pile. Sludge pile,
0-6" 0 -6" 5.5 fl. 12ft. ft. g• -18" 24" 36"
17286 17287 17288 1728g 17301 17W0 17291 17292
arsenic (mgl'il.g) <4 4 4 <4 <3.9 3.9 3.9 <3.9
barium r.:i'i.100 lEI ~ t':':.180£.~ ~J£80~1,. ~,100flrt! ~250il."1. ~E;.180;:;f".;3 t.::~2oor.:~ 16
chromiurr. 30 54 20 20 &~2BOG 190 -tvi::i"300~ ~340~~
lead 26 ~i"?li68~ <10 ~12~:;i ~-:68:Jf:,£ ;:.~160\'.M:.1 fS"";;k.-76~ ~3J6815cU
manganese 100 190 370 280 170 140 220 230
mercury <0.09 B!h0'.14!:~1! <0.09 <0.1 r:it,tt.0.2~:: ~0.39SliJ! ['¥90.31~%1 tl'l'Bf!0.16J;.i*
silver <10 <10 <10 <10 <9.8 ~,14F~·-s:, J;;.··r .. 12 '1:~~ <9.8
20329 20330 20331 20332 20344 20333 20334 20335
acetone (ppb) 2 J.C ,au 509 J.C 20U 221 J.C 504 J,C 77 J.C 6J,C
methylene chloride SU SU SU trace C SU SU SU SU
carbon disulfide SU SU SU trace C SU 4J SU SU
1.1-dichloroethane SU SU SU SU SU vace SU SU
2-butanone (MEK) 20U 20U 20U 20U r'{;'J36"Jl~3'\ :tg,1032•Jr.r: 20U 20U
cis-1.2-dichloroelhene SU SU SU vm SU 4J SU SU
chlorofom1 SU SU SU. . SU --SU SU -SU SU
benzene SU SU SU trace 1 J m':21200 Ji.l"' trace fIT'-;.t:J35'.$._;'.'.;
1,2 dichloroethane SU SU SU trace SU SU SU trace
trichloroet'lene SU SU SU trace SU 3J SU SU
4-methyl L-pentanone 10U 10U 10U 10U 10U t.?;r-a2n~ 10U 10U
toluene SU SU trace ~,;,111~.11 ~975"J~;,'! ;:r,1674"JG' trace io/442~tl"!te
2-hexanone 10U 10U 10U 10U J!Piil\ 126 ~it lm,262 '!.11-::if; 10U 10U
tetrachloroethene SU SU SU vace 1 J 1~8~ SU SU
chlorobenzene SU SU Ira~ ~:'.:,::::Z17,;jl:_jj ?.t~ 7 4 t-:JZ ~1788"JE!:i ~=,13fG"'i ":t~972~'1'ill
ethyl benzene SU SU trace ~;'.<f'i,16!Sl J.E::7!;i;35?J::r,:J t:21..1234~J::r,c; 2J •f.Itf...1D3t~
xylenes SU SU 3J ll:ma1~ -.. s::.1ssm !fi.3103.~~ ~-;;:.:;a~~~ 1G7466~J?:l:t
1.4-dichlorobenz.ene SU SU ··~ ~-124lf,,il ~.! 313 'JI3'fi lcl'J990~J::fil I'.!%13}.lfi~ ~286:'J~
1.2-dichlo-obenzene SU SU SU kY1n.•;5 c.,:~111 11,)fa"; 31 ra-1?.S ii''ii\172:!Eri ;~~?3':7iJ"~.i./'. ht':°1:,20:J:'tJd
J -Estimated value.
C -Possit,te lab contamination or background.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30).
(2) -North Carolina Inactive Hazardous Sites Branch Health Based Remediation Goals for Soil and Groundwater (Ref. 31 ).
• -Reference Dose Screen Concentration.
--Cancer Risk Screen Concentration.
-·--EPA Soil Lead Guidance Level -For areas where contact by children is likely (Ref. 32).
SS-125-\NS SS-26-SL SS-27-Sl
Surface soil Surface soi!
adjacent to adjacent to
Duplicate storage tank storage tank
SS-25--WS #3 #4
17293 17294 17295
<3.9 <3.9 <3.9
~/300~ ~120G~ ~ 20
;1"(.:02: 360 ~ 80 72
c;:;G70P-,~~ 12 <9.8
250 110 63
\!-t-:10.231"'~!.;: <0.1 <0.1
<9.8 <9.8 <9.8
20336 20337 20338
6 J,C 5 J,C ,au
9J,C SU SU
SU vace SU
SU SU SU
20U 20U 20U
SU SU SU
SU trace SU
~s1ass.rt:ti SU SU
R~H'J""¼" SU SU
SU SU SU
10U 10U 10U
t:fr:630"J1i.1 SU SU
10U 10U 10U
SU trace SU
t;:]951[Jtt1l traceC SU
??.{·¼145:f:mtl traceC SU
~";720"J[.w; trace C SU
&331:-.1$1 2J,C traceC
~-3347:7.:i, SU SU
Bold indicates concentration ts at or above EPA Son Exposure Benchmarks (for samples -xllected within Oto 24 inch depth) er Nonh Carolina:, •i' Rtcm~diation Goals
Shading indicates concentration is 2: 3X background or ~ detection limits (DL) when background is < DL.
SS-28-Sl
Down-
gradient of
storage
tanks, 36" -
42"
17296
<3.9
k"':3578~~
210
<9.8
150
<0.1
<9.8
20339
2J.C
SU
SU
SU ,au
-su
SU
SU
SU
SU
10U
SU
10U
SU
vace
SU
trace C
trace C
SU
Background
SS-29-Sl SS-30-SL SS-31-SL
EPA Soil NC Soil
Background Background Exposure Remediation
Background soil, 42" -soil, 12' Bendlmarks Goals (ppm)
soil. 2· -24" 48" depU1 (mgl'ilg)(1) (2)
17297 17298 17299
3.9 3.9 <3.9 0.43"" 4.6
20 <20 20 s,soo·
86 100 65 390• 15,600
12 12 <9.8 400""* 400
100 170 500 11,ocxr
<0.1 <0.1 <0.1 23" 4.6
<9.8 <9.8 <9.8 390• 78
20340 20341 20342
2 J,C 746 J,C 92 J,C 7.8" 1.56
SU SU SU o.08s-0.085
SU SU SU 1.a· 1.56
SU SU SU 7.B• 1.56
20U 20U 20U 47" 9.4
SU _, SU SU o.1a·•r -0.156 -
SU SU SU 0.1· 0.1
SU SU SU 0.022 .. 0.022
SU SU SU 0.001-0.007
SU SU SU 0.058"" 0.058
10U 10U 10U 6.3° 1.26
SU SU SU 16" 3.2
10U 10U 10U
SU SU SU 0.012 .. 0.012
SU SU SU 1.6° 0.32
SU SU SU 1.a· 1.56
SU SU SU 160" 32
SU SU SU 0.027"* 0.027 ·
SU SU SU 7" 1.4
---- -
Lagoon Area
-
Table 9
SOURCE SAMPLING ANALYTICAL DATA SUMMARY
Semi-volatile Analysis
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Dates August 25 and 26, 1997
Waste Pile Storage Tank Soil
-
SS-22-WS SS-35-WS SS-23-WS SS-24-WS SS-25-WS ss,125-WS SS-26-SL SS-27-SL SS-29-SL
(mg/kg)
1,3--diclorobenzene
1 ,4--diclorobenzene
1,2-diclorobenzene
naphthalene
phenanthrene (4)
anlhracene (4)
fluoranthene
pyrene {4)
_ butyl-benzyl phthalate
bis(2-ethylhexyl) phthalate
20356 20260 20357 20358 20359 20360 20361
Sludge/ Sludge Storage
soil lagoon lagoon 5 tank 3
5 depth 12 depth Sludge Sludge Sludge Duplicate surface
ft. 10'-11' pile, 9"-18" pile, 24" pile, 36" SS-25-WS soil
0.33U 0.33K 0.33U 0.33U 0.33U 0.33K 0.33U
0.33U 0.33K ~1W67{~ 0.33U
0.33U 0.33K 0.33U 0.33U 0.33K 0.33K 0.33U
0.33K ',J!01367~ 0.33U 0.33U 0.33K 0.33K 0.33U
0.33K tf~0:9:ik2.J 0.33K 0.33U 0.33K 0.33K 0.33U
0.33K 1tlc(0'~67,J'" 0.33K 0.33U 0.33K 0.33K 0.33U
20362
Storage
tank 4
surface
soil
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
2-methylnaphthalene 0.33K 1'i'1,Qi667l'>i 0.33U 0.33U 0.33K 0.33K 0.33U 0.33U
4-methylphenol (3) rulg!667ZI iii31'.6!667i~ [,;/l!,1,1ft!,i.l 0.33U 0.33U 0.33U 0.33U 0.33U
U -Material analyzed for but not detected. Value given is the minimum detection limit.
K -Actual value is known to be less than value given.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30).
(2) -North Carolina Inactive Hazardous Sites Branch Health Based Remediation Goals for Soil and Groundwater (Ref. 31).
(3) -p-Cresol
(4) -Polynuc!ear aromatic hydrocarbons (coal tar pitch volatiles)
• -Reference Dose Screen Concentration
.... -Cancer Risk Screen Concentration
20364
Background
soil, 2"-24"
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
0.33U
--
Background
SS-30-SL SS-31-SL
20365 20366
Background
Background soil, 12'
soil, 42"-48" depth
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
0.33U 0.33U
Bold indicates concentration is at or above EPA Soil Exposure Benchmarks (for samples within Oto 24 inch depth) or North Carolina Soil Remediation Goals.
Shading indicates concentration is ~ 3X background or ~ detection limits (DL) when background is< DL
-
EPA Soil
Exposure
Benchmarks
(mg/kg) (1)
27 ..
7,ooo·
3, 1 oo·
23,ooo·
3,100·
2,300·
16,ooo·
46 ..
390•
-\
NC Soil
Remediation
Goals (ppm)
(2)
1,400
27
1,400
620
4600
620
.460
·3200
'46
78
-
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
·-... ..!.-
background sample. Sample SS-22-WS aiso· sYi6wed an elevated level of butyl benzyl
phthalate. The samples were collected at depths of 10 to 12 feet from lagoon #5, and
consisted of brown-black sludge and saprolitekludge. The comparable background
sample, SS-31-SL, was collected at a depth of ,12 feet (Ref. 28; App. A).
' The concentration of arsenic in sample:ss-21-WS ( 4 mg/kg) exceeded the EPA
Soil Exposure Benchmark levels (0.43 mg/kg);:however, the level was not significantly . . .
higher than the level detected in the comparabl~ background sample SS-30-SL (3.9
mg/kg), which was also above the benchmark level (App. A).
In sample SS-35-WS, the concentration:of 4-methylphenol (p-cresol) (376.667
mg/kg) exceeded the North Carolina Soil Rem~diation Goal (78 ppm) (App. A).
' The levels of acetone, detected in almo:st every sample, were-disqualified due to
the detection of the parameter in the trip blank,(App: A).
3.2.2 Analytical Results -Waste Pile
Compared to the background soil sampie (SS-29-SL), samples SS-23-WS and SS-
24-WS both showed elevated concentrations of.barium, lead, mercury, silver,
chlorobenzene, xylenes, 1,4-dichlorobenzene, 1,2-dichlorobenzene, fluoranthene, pyrene,
butyl benzyl phthalate, and bis(2-ethylhexyl) phthalate. Sample SS-23-WS also showed
elevated concentrations of2-butanone (MEK), benzene, 4-methyl 2-pentanone, toluene,
2-hexanone, tetrachloroethene, ethyl benzene, _and 4-methylphenol (p-cresol) as compared
with the background sample. Sample SS-24-\XIS showed elevated concentrations of
chromium as compared with the background sample. Sample SS-23-WS was collected at
a depth ~f9 to 018 inches within the waste pile;!ind sample SS-24-WS was collected at a
depth of24 inches. Both samples consisted of brown-black soil. The comparable
background sample, SS-29-SL, was collected a! a depth of 2 to 24 inches, and consisted
of red clay (Ref. 28; Tables 8; 9). :.
Compared to the background soil sample (SS-30-SL), sample SS-25-WS and
duplicate sample SS-125-WS showed-elevated lconcentrations of barium, chromium, lead,
mercury, benzene, toluene, chlorobenzene, ethyl benzene, xylenes, 1,4-dichlorobenzene,
1,2-chlorobenzene, fluoranthene, pyrene, butyi:benzyl phthalate, and bis(2-ethylhexyl)
phthalate. Sample ss,25-WS was collected ai a depth of 36 inches within the waste pile
and background sample SS-30-SL was collected at a depth of 42 to 48 inches (Ref. 28; ,,
Tables 8; 9). '
Concentrations of2-butanone (MEK), ,J;,enzene, 4-methyl 2-pentanone, toluene,
tetrachloroethene, chlorobenzenc, ethyl benzene, xylenes, 1,4-dichlorobenzene, 1,2-
chlorobenzene, and bis(2-ethylhexyl) phthalat~' detected in samples SS-23-WS and/or SS-
24
I
I
I
I
I
I
I
I
I
I
I
I
I
I
0
n
24-WS, which were collected within the waste pile at a depth of O to 24 inches, were
above the EPA Soil Exposure Benchmark levels and the North Carolina Soil Remediation·
Goals (Ref. 28; Tables 8; 9).
The levels of acetone, detected in almost every sample, were disqualified due to
the detection of the parameter in the trip blank (App. A)
3.2.3 Analytical Results -Storage Tanks
Compared to the background soil samples (SS-29-SL and SS-30-SL), one or more
of samples SS-26-SL, SS-27-SL, and SS-28-SL showed elevated concentrations of
barium and bis(2-ethylhexyl) phthalate. None of the parameters were detected at levels
above the EPA Soil Exposure Benchmarks or the North Carolina Remediation Goals
(Tables 8; 9).
The levels of acetone, detected in almo'st every sample, were disqualified due to
the detection of the parameter in the trip blank (App. A).
3.2.4 Analytical Results -Open Pits
· Compared to the background soil sample (SS-29-SL), sample SS-18-SL, coller;ted
from Open Pit #1, showed an elevated concentration of one parameter, barium. Sample
SS-19-SL, collected from Open Pit 112, showed elevated concentrations of barium, lead,
and mercury. Samples SS-18-SL and SS-19-SL and background sample SS-29-SL
consisted of reel clay. No parameters were detected at levels above the EPA Soil
Exposure Benchmarks or the North Carolina Remediation Goals (Tables 8; 9). . '
3.3 Conclusions
The primary activity that occurred at this site consisted of discharging septic
pumpings into ten unlined lagoons. The septic pumpings originated from commercial,
residential, and industrial customers. When th~ business was required by the state to
close out the lagoons, the sludges were removed from the lagoons and the lagoon area
was backfilled with soil; however, the sludges were stockpiled onsite, leaving the source
of the contamination at the site in a different form (Ref. 21). It should also be noted that
the PA/SI sampling in the lagoon area revealed that not all of the sludges were removed,
at least in one lagoon (Ref. 28). Four source areas. have been identified to date: the
lagoon area, the waste pile, the storage tanks, and the open pits. A barb wire fence lines
the facility on the east and west sides, partially limiting public access. Access to the
property on the south side, closest to the source areas, is open (Ref. 5). Findings of the
PA/SI source sampling are collectively summarized in Table I 0.
25
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
'I Table:10
Source Area Conta~inant Summaryt
Contaminants Detected Contaminants Detected Significantly Contaminants Detected
Above EPA Soil Above Background Levels *** Above N.C. Soil
Source Exposure Benchmarks* '' Remediation Goals****
Area '
'I Lagoon Not applicable (All Barium, chromium, lead, mercury, 2-Butanonc, toluene,
Area samples were collected silver, 2-butanOne, toluene, 2-chlorobcnzene, ethyl
at depths below 24 hexanone, chlorobenzene, ethyl benzene, xylenes, 1,4-
inches) benzene, xylenes, 1,4-dichlorobenzene, 1,2-
dichlorobenzene, 1,2-dichlorobenzene, bis(2-
dichlorobenzene, naphthalene, ethylhexyl) phthalate, 4-
phenanthrene, 1clnthracene, methylphenol
fluoranthene, pyrene, butyl benzyl
phthalate, bis(2,ethylhexyl) phthalate,
2-methylnaphthalene, 4-methylphenol
. I Waste Arsenic, 2-butanone, Barium, chromium, lead, mercury, 2-Butanone, benzene, 4-
Pile benzcae, 4-methyl 2-silver, 2-butancine, benzene, 4-mcthyl methyl 2-pentanone,
pentanone, toluene, 2-pentanone, toluene, 2-hexanone, toluene, tetrachloroethenc,
tetrac:: loroethene, tetra ch loroethene, ch lorobenzene, chlorobenzene, ethyl
chlorobcnzene, ethyl ethyl benzene,' xylenes; 1,4-benzene, xylencs, ! ,4-
benzene, xylenes, 1,4-dichlorobenzen_e, 1,2-dichlorobcnzcne, 1,2-
dichlorobcnzene, 1,2-dichlorobenzen·e, fluoranthene, dichlorobenzene, bis(2-
dichloroben:Zene, bis pyrene, butyl bt,nzyl phthalatc, bis(2-ethylhexyl) phthalate
(2-ethylhexyl phthalate) ethylhexyl) phthalate, 4-rnethylphenol
Storage None Barium, bis (2-ethylhexyl phthalate) None
Tanks
Open Arsenic Barium, lead, mercury None
Pits
tRef. Tables 8; 9; App. A .. .
*Superfund Chemical Data Matrix (SCDM) (Ref. 30)
*** Concentration is ;c: 3 times background or ;c: detection limits (DL) when background< DL.
****North Carolina Inactive Hazardous Sites Branch Health Based Remediation Goals for Soil and
Groundwater (Ref. 31 ).
4.0 GROUNDWATER PATHWAY
4.1 Hydrogeology
The site and surrounding area lie in the Piedmont province, underlain by igneous
and metamorphic rocks consisting largely of schist, gneiss, granite, and diorite. Drilled
wells obtain water from fractures in the bedrock whereas the shallower dug and bored
26
I
I
I
I
I
u
D
D
D
E
I
I
I
I
wells obtain water from the weathered material above bedrock. The weathered material
generally ranges from several feet to several tens of feet. The size and number of
fractures appear to decrease with depth. As a result, most ground water occurs at a depth
of less than 150 feet, much ofit in the upper 30 feet of bedrock. Wells drilled in the basic
rocks, such as hornblende gneiss, gab bro, and .diorite, have a slightly higher average yield
than wells in other rock units. The average yield of drilled wells 6 inches or larger in
diameter is less than 19 gallons per minute. Groundwater has a relatively quick
circulation, preventing the water from collecting much mineral matter in solution. With
the exception of a high iron content in some places, the water is of good chemical quality.
(Ref. 33, Pgs. l, I 0, 42)
The Sigmon's site is located within the Cecil Association, comprising deep, gently
sloping to steep, well-drained soils with a subsoil of reddish clay, on granite, gneiss, and
schist (Ref. 34, Pg. 2). Mica schist and granite schist predominate. The age of the unit is
Paleozoic or older (Ref. 33, Pg. 40). The subsoii overlying the bedrock is more than 5
feet thick in most places, but more than 15 feet thick in many places (Ref. 34, Pg. 55).
Although the mantle rock contains much clay, it nevertheless acts as a reservoir to
continuously feed the fractures in the underlyit)!; bedrock (Ref. 33, Pg. 42). The
following describes a representative profile of t!ce upper 78 inches:
0 to 3 to 7 inches -reddish-brown fine sandy loam
6 lo 9 inches -yellowish-red sandy clay loam
9 to 66 inches -red clay
66 to 78 inches -red and reddish-yellow clay loam (Ref. 34)
The soil has a moderate available water capacity and permeability. (Ref. 34, Pg. 55)
At the Sigmon site, nine temporary wells were installed by the North Carolina
Department of Natural Resources and Community Development in September 1980. The
soil boring logs indicate that the upper 33 feet contain red and brown clay, sand, and rock
(Ref. 10).
Most rural areas obtain water from wells that arc dug or bored. These wells are
generally 2 to 4 feet in diameter and penetrate the bedrock. (Ref. 34, Pg. 89). The depth
to groundwater on the Sigmon site is 25 to 33 feet (Ref. 14). There are one drinking
water well and one monitoring well at the facility site. The Sigmon's residential septic
system is located to the east of the house, and the septic system for the facility office is
located to the south of the trailer (Refs. 6; 29).
Normal annuai precipitation at the site is, approximately 48 inches while mean
annual evaporation is approximately 40 inches, yielding a net mean annual precipitation
of 8 inches (Ref. 3).
27
I
I
I
I
m
D
E
I
I
I
I
I
I
I
I
I ...
4.2 Previous Groundwater Samplilfg
Beginning in 1980, when the site first received attention by the North Carolina
Department of Natural Resources and Commui1ity Development (NRCD), the migration
of contaminants from the lagoons to groundwater had been a concern. In September
1980, the NRCD installed nine temporary wells around the lagoon area and collected
groundwater samples. The depth of the wells ranged from 28 to 3 8 feet below ground
surface. The samples were analyzed for alkalinity, bicarbonate, carbonate, chloride,
dissolved solids, hardness, and pH (Ref. 10). The locations of the wells are illustrated on
Figure 7 and the analytical results of note are listed in Table I.
In September 1987, the NRCD installed four permanent monitoring wells (MWl,
MW2, MW3, and MW4) around the lagoon area, at depths of 34 to 39 feet. Sampling
analysis revealed concentrations of nitrates, barium, chromium, copper, iron, mercury,
manganese, and lead above the EPA Drinking Water MCLs and/or the North Carolina
Groundwater Standards (Refs. 12; 14). The locations of the wells are illustrated on
Figure 8 and a summary of historical monitoring of the onsite monitoring wells is
presented in Tables 11 and 12.
In June 1990, DEM sampled two ofthe:onsite wells, MW3 and MW4. It w:is
discovered that the remaining two had been darnaged at the site. Analytic,:;! results
indicated elevated levels of iron, mercury, manganese, and lead above the EPA Drinking
Water MCLs and/or the North Carolina Groundwater Standards. In 1990, the two
damaged monitoring wells (MW! and MW2) were replaced by Mr. Sigmon in the same
vicinity of the previous wells. Analysis of samples collected from the we Us in February
1 991 and May 1993 revealed elevated levels of nitrates, iron, mercury, manganese, lead,
vinyl chloride, and benzene above the EPA Drinking Water MC Ls and/or the North
Carolina Groundwater Standards (Ref. 12; 17).
The concern of groundwater contamination reaching drinking water promp1ed the
DEM to begin the sampling of nearby private drinking water wells. In January 1991, the ' closest drinking water well to the site, which supplies water for a rental mobile home
owned by Allen Cascadden, was sampled for volatile organic compounds only (Ref. 35).
The home is located approximr.tely 400 feet southwest of the lagoon area (Fig. 9). The
well is a 6-inch drilled well, depth unknown (Ref. 5). The analytical data detected
trichloroethene and tetrachloroethene at levels below the EPA Drinking Water MCLs.
The Cascadden well was sampled six more times between 1991 and 1997 by DEM prior
to the PA/SI sampling event. Results of sampling revealed elevated levels of nitrates,
iron, mercury, manganese, zinc, and 1,2-dichloro.ethane above the EPA Drinking Waler
MCLs and/or the North Carolina Groundwater Standards. Several volatile organic
compounds were also detected at levels below the standards. Mr. Cascadden was advised
by the North Carolina Division of Epidemiology to notify his tenants that the water
28
I
I
I
I
I
I
u
D
I
I
I
I
I
I
I
I
Fig. No_: 7
North Carolina
Division of
1
2
1/\
0
J
0
5
0
03
Title: Temporary Well Locations
NC NRCD, Se~tember 1980
Waste Management Scale: l" = 65' Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's S~ptic Tank Service NCD 062 555 792
I
I
I
I
I
I
I
D
n
D
I
I
I
MW! 0
MW2
MW3 O
_ Fig. No: 8
North Carolina
Division of
Title: Temporary Well Locations
NC NRCD, August 1987
Waste Management Scale: l" 65' Date: September
1.998
/
Shed
0
MW4 0
Drawn By:
Donna Wil.son
Superfund Section Site Name: Sigmon's ~eptic Tank Service NCD 062 555 792
I
I
I
I
I
I
I
I
Fig. No: 9 Title: Residential and Monitoring Well Locations~·
North Carolina
Division of
Waste Management Scale: l'' = 370' Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
--l!!!l!!!l l!!!!!!!I
Sample date 9-24-87 (3)
MW1 MW2 MW3
Chloride (mg/I) 8 24 NA
Sulfate 11 9 NA
Nitrates ~J£l5J\(;; 4.2 NA
Silver (mg/I) <0.025 <0.025 NA
Aluminum 120 12 NA
Barium t)16[6}-i 0.65 NA
Calcium 50 33 NA
Chromium f.!\O'O_ssi1 <0.025 NA -
Copper 0.082 -0.017 NA
Iron Ki~!~?:!~~-t~.~-m!.:rt NA
Mercury NA l;0100,1_2~ NA
Potassium 24 5.6 NA
Magnesium 38 13 NA
Manganese F:·iftifJ.6,.tfi:1 i~2;_91i1 NA
Sodium 57 37 NA
Lead t~tQ}~:1.~ <0.05 NA
Zinc 0.4 0.042 NA
I!!!!! liiiim liiiiiil liiii
!
Table 11
GROUNDWATER INORGANIC ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Onsite Groundwater Monitoring Wells -Historic Sampling
6-14-90 (3) 2-21-91 (4) 5-5-93 (3)
MW4 MW3 MW4 MW1A MW2A MW1A MW2A
3 NA NA NA NA
8 NA NA NA NA
0.07 NA NA 7.3 !·:il.5it~i
<0.025 NA NA NA NA
62 NA NA NA NA
\,,;.;-r;4:·5t~1) NA NA 0.71 0.59
29 NA NA NA NA
:&!QI.0]~-~ NA -NA NA -NA
0.032 NA NA NA NA
~95~"/tf.: [;.Ql.5"9t! r:P ~ I-'.? ffJ ~2~ 0.1 NA NA
0.0002 ~QLO_Q9B <0.0002 <0.002 <0.002 <0.0002 t'.lo;o29JJ
18 NA NA NA NA
21 NA NA NA NA
.:~s_t~_1tf,t1 NA t1Jpt~~r~ ~~j:S.Jii tl'I1il)9~ NA NA
8.1 NA NA NA NA
#it0.L11?~ rt~QI_Q8_l?_~; ~Q['J,9~ t310T0.~;a1 <0.02 ffi_OJ.OX.51-l rr:_0;9z,,1\s
0.17 NA NA NA NA
--
8-26-97
Rinse
blank MW1A
NA NA
NA NA
0.01 NA
NA NA
NA NA
0.015 0.8
NA NA .. NA 0.02
NA NA
NA NA
<0.0002 !@}!6.El\!
NA NA
NA NA
NA iJR6!.8.83l
NA NA
<0.01 0.012
NA NA
NA -Not analyzed. Well Depths -34 to 40 feet
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolina as outlined in NCAC Title 15A, Chapter 2L, Section .0200 (Ref. 31).
(3) Sampling conducted by the NC DNRCD, Division of Environmental Management.
(4) Sampling conducted by Bold Research Labs, contracted by A. A. A. Enterprises.
Shading indicates concentration is at or above EPA Drinking Water MCLs or North Carolina Standards.
Note: MW1 and MW2 were replaced in 1990 by MW1A and MW2A, installed in the same vicinity as the original wells (Ref. 12).
---
EPA N.C.
Drinking Groundwater
Water Standards
MCLs (1) (2)
-250
-250
-10
-0.018
--
2 2
--
0.1 . 0.05
1.3 1
0.3
0.002 0.0011
--
--
-0.05
--
0.015 0.015
-2.1
iiEi lliil---::: __ --- -----
Table 12
GROUNDWATER ORGANIC ANAL YT I CAL OAT A SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Onsite Groundwater Monitoring Wells -Historic Sampling
--
Sample date 9-24-87 (3) 6-14-90 (3) 2-21-91 (4) 5-5-93 (3) 8-26-97
Volatile organics
1, 1-dichloroethane (ugn)
cis-1,2-dichloroethene
trichloroethene
methylene chloride
vinyl chloride
1,4-dichlorobenzene
1,2-dichlorobenzene
1,3-dichlorobenzene
benzene
ethyl benzene
chlorobenzene
n-butylbenzene-,_
1,3,5-trimethylbenzene
toluene
2-chlorotoluene
xy!enes
naphthalene
1,2-dichtoropropane
Semi-volatiles
Phenols (ug/1)
Pesticides
Acid herbicides
NA -Not analyzed.
ND -Not detected.
MW1 MW2
ND
0.28
4 3
ND ND
ND ND
T -Tentatively identified, not confirmed.
D -Detected below quantitation limit.
E -Estimated value.
Well Depths -34 to 40 feet
"' -Acetone was detected; however, lab
contamination is suspected.
MW3
ND
NA
NA
NA
EPA
Drinking
Rinse Water
MW4 MW3 MW4 MW1A MW2A MW1A MW2A blank MW1A MCLs (1)
ND ND .
1.3 1 0.41 T 1.6 1
0.51 T 2.3 2
0.25
1 D
:1~2~
3 6.1 4.8 E 9
0.28 T 4.2 E 13
0.38
~~2:3ft Llf3f:.Jj I
4 DT 0.2
0.81 T 5.5 39
1.6 T --·-
1 E
2 D
2
6 D 2.1 4
3.1
0.31 T
ND ND NA NA NA ND
5
ND NA NA NA NA NA NA
ND NA NA NA NA NA NA
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
(2) -Classifications and Water Quality Standards Applicable to the
Groundwaters of North Carolina as outlined in NCAC Title 15A, Chapter 2L,
Section .Q200 (Ref. 31).
Shading indicates concentration is at or above EPA Drinking Water MCLs or
North Carolina Standards.
-
70
5
5
2
75
600
600
5
700
100
-
-
1,000
10,000
-
5
-
-
-
-
(3) Sampling conducted by the NC ONRCD, Division of Environmental Management.
(4) Sampling conducted by Bold Research Labs, contracted by A. A A. Enterprises.
Note: MW1 and MW2 were replaced in 1990 by MW1A and MW2A, installed in the same vicinity as the original wells (Ref. 12).
- -- -
N.C.
Groundwate.
Standards
(2)
700
70
2.8
5
0.015
75
620
620
1
29
50
-
-
1,000
-
530
-
0.56
-
-
-
-
I
I
I
I
I
I
I
u
D
I
I
I
I
I
I
I
I
' should not be used for drinking or cooking purposes (Ref. 35). The current occupant of
the home is Mr. Mike James. Mr. Bill Munford was a previous tenant. A summary of
historical monitoring is presented in Table 13.'
In September 1992, DEM began moni/oring the Shepperd well, which is located
approximately 450 feet southwest of the facility (Fig. 9). The bored well has a diameter
of approximately 30 inches, and a depth to water of approximately 27 feet (Ref. 5). The
vvell was sampled seven times by DEM between 1992 and the PA/SI sampling event.
Results of testing revealed elevated concentrations of nitrates, mercury, manganese, and
chloroform above the EPA Drinking Water MCLs and/or the North Carolina
Groundwater Standards. The home was occupied by four different owner/tenants during
this time, Rhonda Morgan, Florence Russell, Rachel Brown, and Phyllis Frye. The
current owner and occupant is Tom Shepperd.· The North Carolina Division of
Epidemiology has recommended that the water not be used for drinking or cooking
purposes (Ref. 36). Mr. Shepperd is buying his own bottled waler (Ref. 28). A summary
of historical monitoring of the well is presented in Table 14.
In the area southeast of the Sigmon property, Mr. Chris Davidson owns a
relatively large parcel of property, which contains his residence, his business (Davidson
Roofing Co.), and four rental houses (Ref. 6). In Septemb~r 1992, DEM monitored a
well located on the Davidson prope1iy, 200 feet,east of the lagoon area, in the vicinity of
one of the rental houses (Fig. 9). Analytical results revealed elevated levels of iron and
manganese above the North Carolina Groundwater Standards (Ref. 37). Mr. Davidson
stated that in 1994, the tenant of the house closest to the well emptied the contents of a
gas tank on the property, resulting in contamination of his well. The well was abandoned
and a pair of new wells were installed approximately 1000 feet east of the lagoon area to
serve the business and the rental houses. A ne-.y well was also installed at Mr. Davidson's
residence and two monitoring wells were added approximately l 00 to 150 feet southeast
of the lagoon area (Refs. 6; 29; Fig. 9). In 1995 and 1997, DEM sampled Mr. Davidson's
residential well and the pair of wells used for the business and the rental homes, only for
nitrates, mercury, and volatile organics. Analytical results revealed low levels of tested
contaminants (Ref. 37). A summary of historical monitoring of the well is presented in
Table 15.
The residence of John and Frances Lamberth is located approximately 800 feet
northwest of the lagoon area (Fig. 9). In August 1994 and April 1996, DEM analyzed
groundwater samples from their well, which is a bored well approximately 56 to 62 feet
· deep. Analytical results revealed no coricentrations of contaminants above the EPA
Drinking Water MCLs or the North Carolina Groundwater Standards; however, a full
scan of contaminants was not evaluated (Ref. 6; 38). A summary of historical monitoring
of the well is presented in Table 16.
The Steven Lamberth rental mobile home is located to the cast of the Sigmon
14
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Taple 13
GROUNDWATER ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Historic Samplin9 -Cascadden well
I,
EPA
Drinking
I Water
1/27/91 11/13/91 9/1/92 2/22/93 3/6/95 9/5/96 4/7/97 8/25/97 MCLs (1)
Nitrates (mg/I)
Silver (mg/1)
Aluminum
Barium
Calcium
Chromium
Copper
Iron
Mercury
Potassium
Magnesium
Manganese
Sodium
Lead
Zinc
Volatile organics (3)
1, 1-dichloroethane (ug/1)
1,2-dichloroethane
cis-1,2-dichloroethene
trichloroethene
tetrachloroethene
chloroform
1,4-dichlorobenzene
1,2-dichlorobenzene
1,3-dichlorobenzene
benzene
chlorobenzene
1,2,4-trimethylbenzene
xylenes
Semi-volatiles
NA -Nol analyzed.
ND -Not detected.
NA NA
NA <0.005
NA <0.05
NA 0.27
NA 95
NA <0.025
NA 0.014
NA ~1Jfii5!stm
NA fl0'001.3Jil
NA 7
NA 12
NA t~ornr;;:1::
NA 15
NA <0.01
NA [~_~_2153'~.J
0.57
D
0.35 0.89
0.29 0.53
D
1.5
0.3
D
0
D
5.1
NA NA
T -Tentatively identified, not confirmed.
D -Detected below quantitation limit.
E -Estimated value.
l~23!35!@if !ilvc',13\cU t:i'.:€.'~10[~ if~~:;;1 s ~::ii !;\l;;,12~'\l NA
<0.05 NA NA NA NA NA
NA <0.05 NA NA NA NA
0.22 0.14 NA NA NA 0.4
NA 21 NA NA NA NA
<0.04 <0.025. NA NA NA <0.01
<0.05 0.039 · NA NA NA NA
0.08 0.12 NA NA NA NA
~~0!007,i!itl ~]0!00_16i ~~-o·,00,1'.1:ru; ,moroo13,; wimoo_1;11;: jJi:0i00:13;;;
NA 2.8 NA NA NA NA
NA 4.5 NA NA NA NA
P!~0:09t\~ ~Q:066:\1 NA NA NA ~Di25L~
NA 5.3 NA NA NA NA
<0.04 <0.01 NA NA NA <0.005
<0.05 NA I NA NA NA NA
0 D 1.5 1.2 0.59 0.5 E
raois3Kj
0 3.5 3.4 ET 1.3 E 2E
D D 0
D
OT
0.86 0.27 D 0.4 E
0 D
0
D 0
D
D
ND NA NA NA NA ND
The 6 inch well provides water to a rental trailer, located at 177 Lauren
Drive. Prior to 1995, the address of the trailer was listed as Route, 14,
Box 357. The landowner is Allen Cascadden. Tenants have included
Bill Munford and Mike James.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30).
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolina as outlined in NCAC Title 15A, Chapter 2L, Section .0200 {Ref. 54).
(3) -Blank values listed for volatile organic compounds indicates the parameter was not detected.
Shading indicates concentration is at or above EPA Drinking Water MCLs or North Carolina Groundwater Standards.
* Acetone was detected; however, lab contamination is suspected.
-
-
-
2
-
U.1
1.3
-
0.002
-
-
-
0.015
5
70
5
5
100
75
600
600
5
100
10,000
N.C.
Groundwater
Standards
(2)
10
0.018
2
0.05
1
0.3
0.0011
-
0.05
-
0.015
2.1
7("'.· -0.38
70
2.8
2.8
0.19
75
620
62G
1
50
530
--
I
I
I
I
I
I
I
I
' I
I
I
I
I
I
0
D
911192
Nitrates (mg/I) 9.43
Silver (mg/I) <0.05
Barium 0.09
Chromium <0.04
Copper <0.05
Iron 0.014
Mercury <0.0002
Manganese <0.03
Lead <0.Q4
Zinc <0.05
Volatile organics (3)
1, 1-dichloroethane (ug/1) D
cis-1,2-cii:hloroethene
trichloroethene D
chlorofmm
1,4-dichlorobenzene
1,2-dichlorobenzene
benzene
chlorobenzene
xylenes
bromodichloromethane
dibromochloromethar'\e
Semi-volatiles ND
Table 14
GROUNDWATER ANA~YTICAL DATA SUMMARY
Sigmon's Septic Tank Se_rvice NCD 062 555 792
Historic Sampling -Shepperd we\l
!
2122193 3114194 316195 10110195 1017196 418197
J;~11i1~1 8.2 9.4 8.6 7.3 5.2
NA NA NA NA NA NA
NA NA NA NA NA NA
NA NA NA NA NA NA
NA NA NA NA NA NA
NA NA NA NA NA NA
NA !0!00285! ,c0!0058;'. [0!0054~ i::0'.005,1,l !!0!0025.i,
NA NA· NA NA NA NA
NA NA NA NA NA NA
NA NA NA NA NA NA
NA
0.59 0.72 0.65 0.63 0.59
0.43 0.67 ET 0.81 E 0.46
0.27 D
. l't,39.:E·l/!
0.53 0.87 0.74 0.83 0.71
D
D 2 D
3
1
NA NA NA NA ND NA
EPA N.C.
Drinking Groundwater
Water Standards
8125197 MCLs (1) (2)
NA -10
<0.05 -0.018
<0.1 2 2
<0.01 0.1 0.05
NA 1.3 1
NA -0.3
§;D'.Q03M! 0.002 0.0011
!m0!05ff, -0.05
<0.005 0.015 0.015
NA -2.1
.
0.4 E -700
0.6 E 70 70
5 2.8
~~f.0!6}E~ 100 0.19
0.8 E 75 75
D 600 620
0.4 E 5 1
D 100 50
1.2 E 10,000 530
100
60
NA --
NA -Not analyzed.
T -Tentatively identified, not confirmed.
D -Detected below quantitation limit.
E -Estimated value.
The bored well provides water to a trailer, located at 183 Lauren Drive. Prior to 1995,
the address of the trailer was listed as Route 14, Box 356. The property is currently
owned and occupied by Tom Shepperd. Previous owners and tenants have included
Rhonda Morgan, Florence Russell, Rachel Brown, and Phyllis Frye.
Well is 2 foot diametrr, approximately 27 feet to groundwater.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolina as outlined in NCAC Tille 15A. Chapter 2L, Section .0200 (Ref. 54 ).
(3) -Blank values listed f_or volatile organic compounds indicates the parameter was not detected, except for sampling event
2/22/93, in which volatile organics were not analyzed.
Shading indicates concentration is at or above EPA Drinking Water MCLs or North Carolina Groundwater Standards.
" -Acetone detected; however, lab contamination is suspected.
I
I
I
I
I
I
I
I
I
I
I
I
n
D
D
Table 15
GROUNDWATER ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Historic Sampling -Davidson wells
Abandoned well Davidson residence Supply wells #1 & #2 (3)
Nitrates (mg/I)
Sulfates
Silver (mg/I)
Aluminum
Barium
Calcium
Chromium
Copper
Iron
Mercury
Potassium
Magnesium
Manganese
Sodium
Lead
Zinc
Volatile organics
Semi-volatiles
NA -Not analyzed.
ND -Not detected.
9/1/92
<1
6
<0.05
NA
O.o7
NA
<0.04
0.06
~.!1,'.~3\4.P,
0.001
NA
NA
~-::Z0:83Yi:!
NA
<0.04
<0.05
ND
ND
10/10/95 10/10/95
1.4 1.4
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
<0.0002 <0.0002
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
ND ND
NA NA
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
Supply
well #1
4nl97 4/7/97
1.4 NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
<0.0002 NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
ND ND
NA ND
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolifla as outlined in NCAC Title 15A, Chapter 2L, Section .0200 (Ref. 54).
Supply
Supply well
well#2 (south)
4/7/97 8/26/1997
NA NA
NA NA
NA NA
NA NA
NA <0.1
NA NA
NA <0.01
NA NA
NA NA
NA <0.0005
NA NA
NA NA
NA <0.03
NA NA
NA <0.005
NA NA
ND ND
ND ND
(3) -Depth approx. 60 feet, 24 inch diameter, static water level appr_<;>x. 40 feet. Serves 4 homes, 8 people.
EPA
Drinking
Water
MCLs (1)
-
-
-
-
2
-
0.1
1.3
-
0.002
-
-
0.015
Shading indicates concentration is at or above EPA Drinking Water MCLs or North Carolina Groundwater Standards.
N.C.
Groundwater
Standards
(2)
10
250
0.018
-
2
0.05
1
0.3
0.0011
-
0.05
-
0.015
2.1
-
I
I
I
I
I
I
I
I
i I
I
I
I
I
I
0
Table 16
GROUNDWATER ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Servite NCO 062 555 792
Historic Sampling -John Lamberth well
EPA
Drinking N.C.
Water Groundwater
8/4/94 4/17/96 8/26/97 MC Ls (1) Standards (2)
Nitrates (mg/I)
Aluminum (mg/I)
Chromium
Copper
Iron
Mercury
Potassium
Magnesium
Manganese
Sodium
Lead
Zinc
Volatile organics
Semi-volatiles
NA -Not analyzed.
ND -Not detected.
0.01
1.7
<0.05
0.049
0.27
NA
NA
NA
<0.02
NA
<0.01
0.08
ND
NA
NA NA -
0.2 NA -
NA
'
<0.01 0.1
NA NA 1.3
NA NA -
<0.0002 <0.0005 0.002
NA NA -
NA NA -
NA <0.03 -
NA NA -
NA r,,•:010;17•~ ~11 .. ' .1 f ibr 0.015
NA NA -
NA ND*
NA ND -
The bored well provides water to the
home of John and Frances Lamberth,
address 152 Lamberth Ridge Drive.
The Lamberths drink bottled water.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref.30).
10
-
0.05
1
0.3
0.0011
-
-
0.05
-
0.015
2.1
-
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolina as outlined in NCAC Title 15A, Chapter 2L, Section .0200 (Ref. 54).
Shading indicates concentration is at or above EPA Drinking Water MCLs or North
Carolina Standards.
• -Acetone was detected; however, lab contamination is suspected.
Well depth -approximately 40 to 50 feet
I
1c-
l
I
I
I
I
-,
••
I
I
I
I
I
I
I
,I
I
I
Table 17
GROUNDWATER /\NALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Historic Sampling -Steven Lamberth Rental Trailer, 1280 Eufola Road
I
10/10/95 I 8/26/97
Nit rates ( mg/I) 2 NA
Silver (mg/I) NA NA
Aluminum NA NA
Arsenic NA NA
Barium NA <0.1
Calcium NA NA
Chromium NA <0.01
Copper NA I NA
Iron NA I I NA
Mercury <0.0002 <0.0005
Potassium NA NA
Magnesium NA NA
Manganese NA <0.03
Sodium NA ' NA
Lead NA 0.028
Zinc NA NA
Volatile organics .
ci1loroform (ug/I) t":0';,8:iTIJ:" D
Semi-volatiles NA ' 1,4-dichlorobenzene I, 44
1,2-dichlorobenzene I 48
T -Tentat,vely Ident1f1ed, not conf1rm~d.
D -Detected below quantitation limit.
EPA N.C.
Drinking Groundwater
Water Standsrds
MC Ls (1) (2)
-10
-0.018
--
0.05 0.05
2 2
--
0.1 0.05
1.3 1
-0.3
0.002 0.0011
--
--
-0.05
--
0.015 0.015
-2.1
100 0.19
--
75 75
600 620
• -Acetone was detected; however, lab contamination is suspected.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
(2) -Classifications and Water Quality Standards Applicable to the
Groundwaters of North Carolina as outlined in NCAC Title 15A,
Chapter 2L, Section .0200 (Ref 54 ).
Shading indicates concentration is at or above EPA Drinking Water
MCLs or North Carolina Standards.
Trailer home is currently rented to Merle and Deborah Potts.
Robertson was a previous tenant.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
property on Eufola Road, at an approximate distance of 1100 feet northeast of the lagoon
area (Fig 9). In October 1995, DEM analyzed a sample from the well, which is a 20-inch
diameter well, installed to a depth of 50 feet (Ref. 28). The sample was analyzed only for
nitrates, mercury, and volatile organics. Chloroform was detected at a level above the
North Carolina Groundwater Standards. The occupant at the time of the 1995 sampling
event was named Robertson (Ref. 39). The ~urrent occupant of the mobile home is Merle
Potts (Ref. 28). Results of the sampling event are summarized in Table 17.
4.3 Targets
There are no municipal water supply ,wells within a 4-mile radius of the facility
(Ref. 40). The City of Statesville obtains its 1water supply from an intake on the South
Yadkin River, approximately 5.5 miles north of the City of Statesville. The city has not
extended any water lines within a four mile radius of the Sigmon site (Ref. 41 ).
There are seven community water supply wells within a 4-mile radius of the
facility, providing water to subdivisions and.mobile home parks, as listed below in Table
18. The locations of the wells are shown on Figure 1.
Table 18
Community nublic wells
Svstem Name Distance from Sigmon site Pooulation
Buffalo Shoals Park ½ -I mile 66
Timberbrook Subdivision . 1-2miles 69
Spring Shores # I and #2 2-3miles 130
Hidden Valley Mobiie Home Park 3-4miles 43
Heronwood Subdivision # I and #2 .3-4miles 361
Ref. 40
The West Iredell Water Corporation supplies water to areas west of Statesville.
The company purchases its water from the City of Statesville. Distribution lines that
extend within the four mile radius of the Sigmon site are shown on Figure 1 (Ref. 41 ).
The Piedmont Construction & Water Company manages a community well in the
Timberbrook Subdivision, as listed in Table 18 above. The well serves 24 houses and the
location is shown on Figure 1 (Ref. 41 ).
Water lines from the City of Troutman extend within the four mile radius of the
site, as shown on Figure 1. The City of Troutman obtains its water from the City of
Statesville. (Ref. 41 ).
40
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
There are no water lines within the portion of the four mile radius that extends to
Catawba County (Ref. 41 ).
The remaining residents within the study area obtain potable water from private
wells, which have an average depth of casing,of 70 feet below land surface (Ref. 33, Pg.
42). The closest drinking water well to the site is 400 feet southwest of the lagoon area
and serves a mobile home owned by Allen Cascadden. The home is currently rented to
Mr. Mike James. The well is a 6-inch drilled well, depth unknown (Ref. 5). Because of
elevated levels of several contaminants in the well, most notably mercury, the residents of
the home have been instructed not to the drink the waler (Ref. 35). For approximately
one year, bottled water was being supplied lo the Cascadden rental home, by Mr. Sigmon.
The residents now purchase their own bottled water (Refs. 5; 21 ).
'
The population relying on groundwater for potable water was calculated by
conducting a house count within the areas sl~own on the topographic map as not being
served by municipal water lines. The number of houses within 1/4 mile was field
checked and updated during site reconnaissances (Ref. 6). The total number of houses
was multiplied by 2.5, the 1990 U.S. Census data average number of persons per
household in Iredell County (Ref. 42). The:lotal population estimated to use
groundwater within a 4-mile ra,;:us ofthc site is presented below in Table 19.
Radius
0-l/4milc
1/4 -½ mile
½-I mile
1 - 2 miles
2-3milcs
3-4milcs
Refs. 40; 43
Table 19
Groundwat_ct Population
Private and Community
Community Well
Well Population
Population
54 0
123 0
389 66
814 69
1253 130
1974 404
Cumulative Population
54
177
566
1380
2633
4607
There are currently no wellhead protection i1rcas within a 4-mile radius of the site (Ref.
44).
41
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
4.4 Sample Locations
Seven private drinking water wells and two monitoring wells were monitored for
the PA/SI. Sample SS-01-PW was collected from one of the two Davidson supply wells,
located near his roofing business at the corner of Lauren Drive and Buffalo Shoals Road
(Fig. 5). The wells are located close together, and as a pair, increase the yield. The wells
were 24 inches in diameter, and approximately 60 feet deep. The wells serve 4 homes
with 8 residents (Ref. 28). '
Sample SS-02-PW was collected from the Allen Cascadden well, located 400 feet
southwest of the lagoon area (Fig. 5). The home is rented to Mr. Mike James. The well is
a 6-inch drilled well, depth unknown (Ref. 5). The well serves one person (Ref. 28).
Sample SS-03-PW was collected from the Tom Shepperd well, located 450 feet
southwest of the lagoon area (Fig. 5). The bored well has a diameter of approximately 30
inches, and a depth tci water of approximately 27 feet (Ref. 5). Because there were no
outside faucets, the sample was collected from the kitchen faucet. The well serves one
person (Ref. 28).
Sample SS-04-PW was collected from the Steven Lambert], well, loc::tcd just east
of the Sigmon property on Eufola Road, approximately I 100 feet northeast of the lagoon
area (Fig. 5). The current occupant of the rental trailer is Merle Potts. The 20-inch
diameter well has a depth of 50 feet. The well serves two persons. The well sample was
intended to serve as a background sample (Ref. 28).
Sample SS-32-PW was collected from the residence of Mary Sigmon, who lives
on the facility property, approximately 1200 feet north of the lagoon area (Fig. 5). No
information was available for the depth of the well. The well serves two persons (Refs. 6;
28).
Sample SS-33-PW was collected from the home of John and Frances Lamberth,
who live on Lamberth Ridge Drive, a·pproximately 800 feet northwest of the lagoon area
(Fig. 5). The bored well is approximately 56 to 62 feet deep. The well serves two
persons (Ref. 6; 28).
Sample SS-34-PW was collected fr?m the home of Matt Frye and Sheila Tenney,
located approximately 600 feet cast of the lagoon area (Fig. 5). The well was not
originally listed in the sampling plan, but was added after the discovery of the new mobile
home park. The well is 363 feet deep and serves three persons (Ref. 28).
Sample SS-05-GW was collected from the onsite monitoring well, located
approximately 30 feet from the western property line fence, near the lagoon area (Fig. 6).
The onsite monitoring well is most likely MW! A, installed in 1990 by Mr. Sigmon's
42
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
0
contractor, Geologic Exploration, Inc., to replace damaged MW!. The two-inch well has
a depth of 40 feet. A bailer was used to purge and sample the well (Ref. 29). The sample
was very turbid (Ref. 28).
Sample SS-06-GW was collected frnm one of Chris Davidson's monitoring wells,
located approximately I 00 feet southeast of the lagoon area (Fig. 5). The two-inch well
has a depth of 30 feet. A peristaltic pump was used to sample the well (Ref. 28; 29).
The samples were delivered to the State Laboratory of Public Health for analysis
of metals, volatiles, semi-volatiles, PCBs, (App. A). Sampling locations are illustrated
on Figure 5.
4.5 Analytical Results
Analytical data from the August 1997 PA/SI is summarized on Table 20. The
analytical results of the background well, SS-04-PW, ;·evealed detectable concentrations
of 1,4-dichlorobenzene and 1,2-dichlorobenzene, and an elevated level of lead
significantly above the EPA Drinking Water MCL. All other contaminants were not
detected. Although the elevated levels of contaminants can be attributed to the Sigmon
site, it is questionable for two reasons. First,'the well is located 1100 feet topographically
upgradient from the source areas. Secondly, the contaminants do not correspond to the
contaminants found in the two closest wells, most notably manganese and mercury. For
comparison purposes, SS-04-PW was considered background, for all contaminants
excluding 1,4-dichlorobenzene, 1,2-dichlorobenzene, and lead (App. A).
Compared lo the background sample (SS-04-PW), the sample collected from the
closest well to the site (SS-02-PW), the Cascadden well, showed elevated concentration
ofbariuin, manganese, and mercury. Analysis of the Shepperd well, SS-03-PW, located
near the Cascadden well, also revealed elevated levels of manganese and mercury, as
compared.with background sample SS-04-PW. The manganese and mercury levels for
the two wells were above the EPA Drinking Water MCLs and/or the North Carolina
Groundwater Standards (Table 20; App. A).
No elevated concentrations of contaminants were detected above the background
samples in the Davidson well sample (SS-0 I-PW), the Sigmon drinking water well on-
site (SS-32-PW), or the monitoring well located southeast of the lagoon area on the
Davidson property (SS-06-GW) (Table 20; App. A).
The Lamberth well, SS-33-l'W, contained a concentration of lead above the EPA
Drinking Water MCI.:s and the North Carolina Groundwater Standards (Table 20; App.
A).
The Frye/Tenney well, SS-34-PW, con,tained an elevated level of manganese, as
43
1111!1 ,--l!!!!!I l!!!!!!!!I l!!!!!!I --
SS-01-PW SS-02-PW SS-03-PW
Cascadden
- --·--
Table 20
GROUNDWATER ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Dates August 25 and 26, 1997
--- -
SS-04-PW SS-32-PW SS-33-PW SS-34-PW SS-05-GW SS-06-GW SS-100-TB SS-200-RB
Steven
Lamberth John Equiµment
-
EPA
Drinking
Davidson (James) Shepperd (Potts) Sigmon Lamberth Onsite Offsite rinsate Water MCLs
well well well well
Volatile Organic Purge and
Trap Method 20284 20285 20286 20287
c.cetone (ppb} 64J 99J 108J 233J
methylene chloride SU SU SU SU
1, 1-dichloroethane SU 0.SJ 0.4J SU
2-butanone 20U 20U 20U 20U
cis-1 ,2-dichloroethene SU 2J 0.6J SU
chloroform SU SU 0.6J trace
benzene SU trace 0.4J SU
4-methyl-2-pentanone 10U 10U 10U 10U
t•Jluene SU SU SU SU
chlorobenzene SU trace trace SU
ethyl benzene SU SU SU SU
xylenes SU trace 1.2J SU
·1 ,4-dichlorobenzene SU 0.4J 0.BJ SU
1,2-dichlorobenzene SU trace trace SU
Base/Neutral and Acid
Extra eta bl es 20303 20304 20305 20306
1,3-diclorobenzene (ug/1) 10U 10U 10U 10K
1,4-diclorobenzene 10U 10U 10K 44
1,2-diclorobenzene 10U 10U 10U 48
naphthalene 10U 10U 10U 10K
l-methylnaphthalene 10U 10U 10U 10U
Metals 17259 17260 17261 17262
barium (mg/l) <0.1 !!':illi0;4:!ll!II <0.1 <0.1
chromium <0.01 <0.01 <0.01 <0.01
lead <0.005 <0.005 <0.005 0.028
r.1anganese <0.03 ~0)25~~ ~o:osfili <0.03
mercury <0.0005 ~o:oo.13!11l i!ll0!003~ll!i <0.0005
pH 6.9 6.4 6.5 6.7
C -possible lab contamination
l/ -Material analyzed for but not detected. Value given is the minimum detection
J -Estimated value, value given is below method detection limit
I< -Actual value is known to be less than value given.
well well Tenney wel I monitor wel I monitor well Trip blank blank
20297 20299 20300 20288 20289 20298 20302
i 1 J 24J JIJ 76J 31J BJ 17J
2J,C SU SU trace-C SU SU SU
SU SU SU 1J SU . SU SU
20U 20U 20U 20U 20U 20U 3J
SU SU SU 2J SU SU SU ·-SU SU !,ace SU SU SU trace
SU SU SU 3J SU SU SU
10U 10U 10U 1J 10U 10U 10U
SU SU trace trace SU SU SU
SU SU SU ::D39}w,!, SU SU SU
SU SU SU 0.2J SU SU SU
SU SU SU 4J SU SU SU
SU SU SU llllffi91!1i11!1 SU SU trace
SU SU SU~ mm!,13~ SU SU SU
20316 20317 20318 . 20307 20308 20320
10U 10U 10U 10U 10U NA 10U
10U 10U 10U 10U 10U NA 10U
10U 10U 10U 10U 10U NA 10U
10U 10U 10U 10U 10U NA 10U
10U 10U 10U 10K 10U NA 10U
17272 17274 17275 17263 17264 17273 17277
<0.1 <0.1 <0.1 ll!Jll10!8)!ffi: <0.1 <0.1 <0.1
<0.01 <0.01 <0.01 !!ill! o:02B. <0.01 <0.01 <0.01
<0.005 ,ill!0!0,17,l!ll! <0.005 111!!0!0.12\lll! <0.005 <0.005 <0.005
<0.03 <0.03 l1!!il O ! 0.5 !II, m1&'aal!l;'! <0.03 <0.03 <0.03
<0.0005 <0.0005 <0.0005 ~o:&7'1illi! <0.0005 <0.0005 <0.0005
6.8 6.6 6.5 6.5 7.1 NA 6.7
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30)
(2) -Classifications and Water Quality Standards Applicable to the Groundwaters of
North Carolina as outlined in NCAC Title 15A, Chapter 2L, Section .0200 (Ref. 54) .
.Shading indicates concentration Is ~ 3X background or ~ detection limits (DL) when background is < DL.
E!old indicates c~ncentration is at or above EPA Drinking Water MCLs
(1)
-
5
-
-
100
5
-
1,000
100
700
10,000
75
600
I
600
75
600
-
-
2
0.1
0.D15
-
0.002
-
-
N.C.
Groundwater
Standards (2)
700
5
700
170
0.19
1
1,000
50
29
530
75
620
620
75
620
-
-
2
0.05
0.015
0.05
0.0011
6.5-8.5
I
I
I
I
I
I
I
I
I
I
I
I
I
I
D
0
g
I
I
compared to background, and equal to the Nqrth Carolina Groundwater Standard (Table
20; App. A). .
Analytical results from sample SS-05-GW, the onsite monitoring well located
west of the lagoon area, revealed elevated levels of chlorobenzene, 1,4-dichlorobenzene,
1,2-dichlorobenzene, barium, chromium, lead, manganese, and mercury. The
concentrations of manganese and mercury were also above the EPA Drinking Water
MCLs and/or the North Carolina Groundwater Standards. The mercury level, 0.67 mg/I,
significantly exceeded the EPA Drinking Water MCL of 0.002 mg/I (Table 20; App. A).
The levels of acetone, detected in almost every sample, were disqualified due to
the detection of the parameter in the trip blank (App. A).
4.6 Conclusions
It is apparent that the operations occurring at the Sigmon site have impacted
groundwater. The contaminants detected in the source areas were the same contaminants
detected at elevated levels in nearby drinking ,vater we!;, (Tables 8; 9; 20).
Manganese and mercury, which were ,!elected a, elevated levels in the open pits,
the lagoon area, and the waste pile, were detected in drinking water samples SS-02-PW
and SS-03-PW at levels above the EPA Drinking Water MCLs and/or the North Carolina
Groundwater Standards. The levels of manganese and mercury detected in the onsite
monitoring.well were magnitudes higher. Manganese was also detected above
background in sample SS-34-PW.
The volatile organic compounds detected in the source areas at elevated levels
were also found in low levels in samples SS-02-PW, SS-03-PW, SS-04-PW, and SS-05-
GW (Tables 8; 9; 20).
One questionable result is the finding oflead in samples SS-04-PW and SS-33-
PW. Although lead is attributable to the site, the level of lead in other wells, in particular
SS-02-PW and SS-03-PW (the two drinking water wells closest to the site), was below
the method detection limit.
Based on the PA/SI sampling results, users of the Cascadden well, the Shepperd
well, and the Lamberth/Potts well were advised by the North Carolina Occupational and
Environmental Epidemiology Section not to drink the water due to elevated levels of
lead, mercury, and/or manganese (Ref. 55). The residents of the Cascadden and
Shepperd homes are buying bottled water, and the residents of the Potts home have
installed a water filter on the well and are drinking the water (Ref. 28).
45
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
5.0
5.1
SURFACE WATER PATHWAY
Hydrology
The Sigmon's Septic Tank site lies outside of the 500-year flood plain (Ref. 45).
The 2-year 24-hour rainfall at the site is 3.5 inches (Ref. 2).
As noted from the topographic map (Fig. I), there is very little surface water
drainage onto the source areas. An area consisting of approximately 2.5 acres northeast
of the source area drains southwest onto the lagoon area. The total surface drainage area,
including the source areas, was calculated to be 5.4 acres (Ref. 46).
The waste pile and the open pits are not covered with clean soil, nor are there
barriers (ditches, berms) to prevent rainfall run-on (Photos). The lagoon area has been
covered with soil, reportedly to the depth of ~xcavation, 10 feet (Refs. 5; 7).
As shown on Figure 5, run-off from the lagoon area, the waste pile, and the open
pits flows radially northwest, west, southwest, south, and southeast. Rm-off from the
soil surrounding the storage tanks flows west. Surface water run-off flowing to the
northwest and west enters an intermittent stream (intermittent stream # 1) norL, ,west of the
lagoon area, which flows approximately 950 feet northwest and joins another i!,lermittei1t
stream (intermittent stream #2). The second intermittent stream carries runoff from the
Lamberth pond to the Williams pond. The Lamberth pond is located near the residence
of John and Frances Lamberth. From the confluence of the two intermittent streams, the
surface water flows into a wetland area before entering the Williams pond. The linear
wetland is approximately 305 feet in length and one of several probable points of entry
(PPEl) for site run-off to the surface water pathway (SWP). Drainage from the Williams
pond is intermittent; therefore, the wetland and pond represent an isolated watershed.
The overland flow distance from the sources to PPEl is approximately 1280 feet (Fig.
10).
Drainage from the Williams pond enters an intermittent stream (intermittent
stream #3), and flows southwest approximately 2100 feet to the two successive Sliwinski
ponds. The entry point for the ponds represents PPE2. Drainage from the Sliwinski
ponds is intermittent; therefore, the ponds represent an isolated watershed. The overland
flow distance from the sources to PPE2 is approximately 0.7 mile (Fig. 10).
Surface water run-off flowing to the southwest, south, and southeast direction is
intercepted by a drainage ditch on the north side of Lauren Drive. The ditch carries the
flow approximately 500 to 800 feet cast to a culvert under Lauren Drive. The culvert
diverts the water to the Davidson pond, located just south of Lauren Drive. The entry
point to the Davidson pond represents PPE3:. Effluent from the Davidson pond is
intermittent; therefore, the pond represents an isolated watershed. The overland flow
46
I
I
I
..
I
I
North Carolina
Division of.
Streams
Waste Management Scale: l'' = 850' Date: September
1998
Drawn By:
Donna Wilson
Superfund Section Site Name: Sigmon's Septic Tank Service NCD 062 555 792
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
distance from the sources to PPE3 is approximately 500 feet (Fig. 10).
Intermittent stream #4, downgradient of the Sliwinski ponds and .intermittent
stream #5, downgradient of the Davidson pond, converge at PPE4, the headwaters of a
perennial unnamed tributary to the Catawba River. Surface water runoff from the sources
flows 1.1 miles along t_he northern intermittent stream and 1.2 miles along the southern
intermittent stream to the headwaters of the unnamed tributary (PPE4) (Figs 1; 10).
Beginning at PPE4, the unnamed tributary to the Catawba River flows southwest
for 4700 feet (0.89 mile) to the confluence with Catawba River/Lake Norman (Fig. 1).
The mean annual flow of the unnamed tributary is 0.1 cubic feet per second (cfs) (Ref.
47). The Catawba River flows southeast, then south to the end of the 15 mile SWP (Fig.
1). The Catawba River has a mean annual flow rate of 1,730 cfs (Ref. 47). The 15 mile
SWP ends on the Catawba River approximately 0.7 mile south of the Iredell/Catawba/
Lincoln County line junction, near the confluence with Little Creek in Lincoln County
(Fig. 1 ).
5.2 Targets
There are no drit,'.:ing wakr intakes located within the watersheds of PPEl,
PPE2, PPE3 or within 15 miles downstream of PPE4 along the SWP (Ref. 40). One
intake is located on a tributary to the Catawba River within the 15 mile SWP, but not
downgradicnt of the surface water runoff from the Sigmon's site. The intake is on the
Cornelius Creek, north ofl-lighway 150 and west of Highway 77 (Ref. 48; Fig. 1).
According to the loca, Nor,,1 Carolina Wildlife Enforcement officer, the unnamed
tributary to the Catawba River is being fished, mostly in the spring. It has been dredged,
which may not be shown on the topographic map. The extent of the Catawba River
located within the 15 mile SWP is heavily fished for human consumption (Ref. 49).
The Davidson and Sliwinski ponds arc being fished. The Williams pond is not
used for fishing (Ref. 28; 29).
The portion of the Catawba River within the 15 mile SWP pathway is classified
by the State as Class WS-lV &B CA, which means: I) the waters are protected as water
supplies and arc in moderate!)'. to highly developed watersheds, 2) the waters are
classified for primary recreation, and 3) the waters are classified as critical areas (Ref.
50). '
Along the 15 mile SWP downgradient of PPE4, two segments of wetland frontage
were measured from the National Wetlands Inventory Map, as listed below in Table 21
(Ref 51).
48
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Table 21
Wetland Frontage Along the 15 mile Surface Water Pathway
Distance from PPE4 Wetland frontage length (miles)
(miles)
0.5 0.08
10.5 0.08
At PPEI, a wetland is present upgradient of the Williams pond. The length of the
linear wetland is 305 feet (Ref. 28).
No endangered species have been identified as inhabiting the 15 mile SWP below
PPE4. Sighting of a North Carolina animal of special concern, Carpiodes velifer (Highfin
Carpsucker), has occurred at a distance of 12.5 miles downstream of PPE4 (Fig. 1 ). No
endangered species have been identified as inhabiting the isolated watersheds below
PP El, PPE2, or PPE3 (Ref. 52).
5.3 Sample Locations
PA/SI sampling of the surface water pathway was conducted by the North
Carolina Superfund Section in August 1997 and included drainage ditches, intermittent
streams, ponds, and the unnamed tributary to the Catawba River (Ref. 28; Figs. 5; 6).
. Run-off from the source areas to the northwest and west enters an intermittent
stream (intermittent stream # 1) northwest of the lagoon area (Fig. 10). Surface water
sample SS-16-SW and sediment sample SS-16-SD were collected in intermittent stream
#1, approximately 40 feet upgradient of the confluence with intermittent stream #2 (Fig.
6). The sediment was gray file silt, organic rich, with a slight hydrogen sulfide odor (Ref.
28; Photos).
Surface water sample SS-116-SW and sediment sample SS-116-SD were
collected from intermittent stream #2, which flows from the Lamberth pond to the
Williams pond (Fig. 6), The samples were collected at a location approximately 40 feet
upgradienl of the confluence with intermittent stream # 1, as a back;;round sample for
intermittent stream #1. The sediment was a gray file silt with a small amount of sand,
and exhibited a hydrogen sulfide odor (Ref. 28; Photos).
Surface water sample SS-17-SW was collected downstream of the Williams pond
dam (Fig. 6). Sediment sample SS-17-SD was collected near the head of the pond. The
sediment was a gray file silt with little sand (Ref 28; Photos).
49
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Surface water/sediment sample SS-07-SW/SD was collected on the tributary to
the Catawba River, approximately I 00 feet below PPE4 (Fig. 6). The sediment was a
light brown silty sand with little organic conte~t (Ref. 28; Photos).
Surface water runoff from the source areas to the southwest, south, and southeast
is intercepted by a drainage ditch on the north side of Lauren Drive (Fig. 5). Soil sample
SS-13-SL was collected in the drainage ditch, southwest of the lagoon ~rea, in an area
that appeared to be a crest for dividing the ditch flow to the east and west, for the purpose
of a background ditch sample. The sample was collected at a depth of 3 to 6 inches. The
soil was brown, organic, clayey sand (Ref. 28; Photos).
Soil sample SS-11-SL was collected in the drainage ditch at the southeast corner
of the Sigmon property (Fig. 5). The sample location was moved from the location
identified in the sampling plan because very little surface water flow was observed at the
original location shortly after a heavy rainfall. The sample was a reddish brown loamy
clay, collected at a depth of2 inches (Ref. 28; Photos).
Surface water and sediment samples SS-10-SW/SD were collected from the
Davidson pond, south of Lauren Drive (Fig. 5). The pond was covered with duck weed
and algae, which made collection of the headspace-free.VOA sample difficult. T!-:e
samples were collected from the western edge of the pond, at the dam. The sediment
sample was an olive gray silt with sand, containing organic matter (Ref. 28; PholosJ.
Background pond sample SS-08-SW/SD was collected from a pond located 0.5
mile south of the lagoon area (Fig. 6). Runoff from the pond enters intermittent stream
#5, upgradicnt of PPE4. The sediment sample consisted of gray, silty sand with light to
moderate organic matter (Ref. 28; Photos).
Background surface water and sediment samples SS-09-SW/SD were collected on
Norwood Creek, approximately 1.3 miles east of the Sign1on property (Fig. 6). The
sediment sample consisted of medium brown fine silt (Ref. 28; Photos).
5.4 Analytical Results
Soil, surface water, and sediment samples were analyzed by the North Carolina
State Laboratory of Public Health for volatile organics, metals, acid and base/neutral
extractables, and PCBs. Results are included in Appendix A and are summarized in
Tables 22, 23, and 24.
Analytical results revealed no elevated concentrations of contaminants in the
aqueous samples for samples SS-16-SW and SS-17-SW, when compared lo background
samples SS-116-SW and SS-08-SW, respectively (Table 24). A review of the analytical
results for the respective sediment samples revealed one elevated contaminant,
50
--·-- --- - -- ---- -
Table 22
OVERLAND FLOW PATHWAY SOIL ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Dates August 25 and 26, 1997
SS-11-SL SS-13-SL SS-16-SD SS-116-SD
Sediment, EPA Soil
Drainage Drainag2 Sediment, below Exposure
ditch, SE ditch, int stream Lamberth Benchmarks
of site background west of site pond (mg/kg) (1)
Background
sample SS-13-SL -SS-116-SD -
17282 17283 17284 17300
arsenic (mg/kg) <4 <4 <3.9 <3.9 0.43**
barium 80 80 39 20 5,500*
chromium 20 18 <9.8 74 390*
lead r:~r:,22~~ <10 <9.8 <9.8 -400*** 1::.:.oa1\t ___ .:.,;;;ft"
manganese 340 280 rlJ~250K;f.1~ 63 11,000*
20325 20326 20327 20343
acetone (ppb) 17 J,C 2 J,C 14 J,C 43 J,C 7.8*
toluene SU SU 3 J,C SU 16*
C -possible lab contamination ..
U -Material analyzed for but not detected. Value given is the minimum detection limit.
J -Estimated value. Value given is below method detection limit.
(1) -Superfund Chemical Data Matrix (SCDM) (Ref. 30).
(2) -North Carolina Inactive Hazardous Sites Branch Health Based Remediation Gor1ls for Soil and
Groundwater (Ref. 31 ).
• -Reference Dose Screen Concentration.
*--Cancer Risk Screen Concentration.
••• -EPA Soil Lead Guidance Level -For areas where contact by children is likely (Ref. 32)
NC Soil
Remediation
Goals (ppm)
(2)
4.6
-
15600
400
-
1.56
3.2
Shading indicates concentration is <! 3X background or ~ detection limits (DL) when background is< DL.
- ---\
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
\
I
I
Table 23
SEDIMENT ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 7,92
Sampling Dates August 25 and 26, 1997
SS-07-SD SS-09-SD SS-10-SD SS-17-SD
Sediment Sediment -Sediment Sediment,
below background Davidson Williams
PPE stream pond pond
Background
sample SS-09-SD -SS-08-SD SS-08-SD
17278 17280 17281 17285
arsenic (mg/kg) <4 <4 <3.9 <3.9
barium 80 --120 ~lrU·f OI'J~Li <20
chromium 40 16 12 9.8
manganese 500 200 27 25
20321 20323 21)324 20328
acetone (ppb) 440 J,C 118J,C 236 J,C 224 J,C
carbon disulfide 5U SU t1ace trace
toluene 1 J 5U 5U 5U
C • possible lab contamination.
SS-08-SD
Sediment
background
pond
-
17279
4
<20
14
30
20322
359 J,C
5U
trace
U • Material analyzed for but not detected. Value given is the minimum detection limit.
J • Estimated value. Value given is below method detection limit.
Shading Indicates concentration is ~ 3X background or~ detection limits (DL) when
background is < DL.
----- - - - - - ---- - - - - - - - -
';
SS-07-SW SS-09-SW
20290 20292
Background
Below perennial
PPE4 stream
Background
sample SS-09-SW -
acetone (ppb) 32J 12J
carbon disulfide 5U 5U
toluene 5U 5U
Metals (mg/I) 17265 17267
barium <0.1 <0.1
chromium <0.01 <0.01
lead <0.005 <0.005
manganese ~~roJ2;111~~}; <0.03
Table 24
SURFACE WATER ANALYTICAL DATA SUMMARY
Sigmon's Septic Tank Service NCO 062 555 792
Sampling Dates August 25 and 26, 1997
SS-10-SW SS-110-SW SS-17-SW SS-OB-SW
20293 20294 20296 20291
Davidson Duplicate Williams Background
pond SS-10-SW pond pond
SS-OB-SW SS-OB-SW SS-OB-SW -
24J BJ 10J 27J
trace 5U 5U 5U
0.6J 0.6J 5U 5U
17268 17269 17271 17266
. L:'.1.r.:iQL1.:::: .. _ ~ ~g~0}2~~ <0.1 <0:1
<0.01 ,/42.;s, '' . ~.--_,, ~--if<0 01=,,-· ;;,-,.,.,,,, t · i.:Ji:kO:fil <O 01 <0.01
<0.005 ~9}Q_:1,91~f;! <0.005 <0.005
~;,;'.li0~3'(;S;:;;;: ~i,f2~~fil 0.04 0.06
U -Material analyzed for but not detected. Value given is the minimum detection limit
J -Estimated value, value given is below method detection limit
SS-16-SW
20295
Int stream
west of site
SS-116-SW
21J
5U
5U
17270
<0:1 ---
<0.01
<0.005
0.05
Shading indicates concentration is > 3X background or_> detection limits (DL) whe~ background is < DL.
SS-116-SW SS-100-TB
20301 20298
Below
Lamberth
pond Trip blank
16J BJ
5U 5U
5U 5U
17276 17273
-<0.1 <0,1C
<0.01 <0.01
<0.005 <O 005
0.07 <0.03
I
I
I
I
I
I
I
I
I
I
I
I
I
·I
I
I
I
I
manganese, in sample SS-16-SD (Table 22). No elevated contaminants were detected in
sample SS-17-SD (Table 23).
Sample SS-07-SW, collected below PPE4 in the unnamed tributary to the
Catawba River, contained an elevated level of manganese in the aqueous sample, as
compared to background sample SS-09-SW. No elevated levels of contaminants were
detected in the perennial stream sediments collected at the same location, SS-07-SD
(Table 23).
Sample SS-11-SL, collected southeast of the lagoon area within the drainage
ditch, contained an elevated level of lead, as compared with background ditch sample SS-
13-SL.
Analysis of sample SS-10-SW and duplicate sample SS-110-SW, collected from
the Davidson pond, revealed elevated levels of barium and manganese in both aqueous
samples as compared to background pond sample SS-08-SW. Chromium and lead were
detected above background in sample SS-110-SW, but not sample SS-10-SW (Table 24).
In sediment sample SS-10-SD, barium was also detected above background levels (Table
23),
The levels of acetone, detected in almost every sample, were disqualified due to
the detection of the parameter in the trip blank (App. A).
5.5 Conclusions
Manganese was detected at levels above background in four samples: SS-16-SD,
collected from intermittent stream #1; SS-07-SW, collected from the unnamed tributary
to Catawba River below PPE4; and SS-10-SW and SS-1 IO-SW, collected from the
Davidson pond. Although manganese does not appear to be elevated in the source areas,
the ievel of manganese in groundwater on the site property is significantly higher than
background and the North Carolina Groundwater Standards (Tables 20; 22; 23; 24).
Furthermore, aqueous samples taken from the lagoons in 1992 revealed levels of
manganese as high as 13.3 mg/I (Ref. 19; Table 3).
The level oflead detected in ditch sample SS-11-SL was above the background
level (SS-13-SL). Barium was also elevated in sample SS-10-SW and SS-10-SD.
Barium and lead arc attributable to the site, found in elevated levels in the open pits, the
lagoon samples, and the waste pile (Tables 8; 9).
A fishery is present at sample location SS-10-SW, and below sample location SS-
07-SW, where releases of chromium, lead, manganese, and barium can be established in
one or both samples (Refs. 29; 49).
54
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
6.0 SOIL EXPOSURE AND AIR PATHWAYS
6.1 Physical Conditions
Public access to the site is partially limited with a barb wire fence on the east and
west sides of the property. However, there is an opening in the fence on the east side,
near the new mobile home park (Ref. 5; 29). Public access is partially limited on the
north side of the property by the presence of the Sigmon residence; anyone entering the
property from the north would be seen by the Sigmons. At one time, a fence was present
along the south side of the property, but access is now unlimited by a large opening in the
fence. An employee of Sigmon's stated that people have trespassed on the property with
either four wheel drive vehicles or all-terrain vehicles (Ref. 5)
The property is being used for the operation of Sigmon' s Environmental Service,
owned by Mary Sigmon, daughter of Mr. Henry Sigmon. Five workers are employed at
the site (Ref. 6).
6.2 Soil and Air Targets
There are no homes, schools, or daycares on or within 200 feet of site related
contamination (Fig. 1 ). The facility is actively being used, however, for the operation of
Sigmon's Environmental Services, which employs five workers (Ref. 6). The active
work areas include one source area, the soil surrounding the above ground storage tanks .
. The other source areas, the lagoon area, the waste pile, and the open pits are not within
200 feet of active work areas (Fig. 2). The open pits are not apparently used for any
purpose, and are surrounded by dense vegetation.
According to the North Carolina Center for Geographic information and Analysis,
there are 6,017 people living within a4-mile.radius of the site (Ref. 53). However, the
population within 1/4 has been adjusted to reflect field observations, which increased the
population within from 19 to 54 (Ref. 6). The nearest residents to the sources are the
occupants of a rental house owned by Chris Davidson, approximately 200 feet southeast
of the lagoon area. The nearby population within a 4-rnile radius of the site is presented
below in Table 25.
55
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
11
Distance Radius
0 -1/4 mile
1/4 - ½ mile
½-I mile
I -. 2 miles
2 - 3 miles
3 - 4 miles
Table 25
Residential Population
Population
54
59
277
997
1691
2974
Cumulative Population
54
113
390
1387
3,078
6,052
Within a four mile radius of the site, there are no identified habitat areas for state
and federal endangered species. A state listed animal of special concern, the Carpi odes
velifer (Highfin Carpsucker), has been identified within a two to three-mile radius of the
site, and an identified Natural Area is present, the Duke Power State Park (Ref. 52; Fig.
I).
One wetland area is present within a one mile radius of the Sigmon site, located at
PPE I, above the Williams pond. The length of the linear wetland is 305 feet (Refs. 28;
51 ). The National Wetlands Inventory Map indicates that there are no other wetlands
within a one mile radius of the Sigmon site.• Other wetland areas within a 4-rnile radius
of the site are summarized below in Table 26 (Ref. 51).
Distance Ring
Table 26
Wetland Acreage
Acreage
0 -1/4 mile (including) none
1/4 -½ mile none
½ -1 mile none
I - 2 mile 35
2-3mile 120
3-4mile 110
56
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
6.3 Soil Sample Locations
Because contaminated soil has been considered one of the sources at the site, soil
sample locations are the same as those identified in Section 3. I of this report titled
"Waste/Source -Sample Locations." The exception are the samples collected from the
lagoon area, which were greater than 2 feet below the surface and not considered soil
exposure samples. Locations are marked on Figure 5.
Waste samples SS-23-WS and SS-24-WS were collected from the waste pile at
depths of 9 to 24 inches. Soil samples SS-18-SL and SS-19-SL were collected from the
two open pits at depths of Oto 6 inches. Soil samples SS-26-SL and SS-27-SL were
collected in front of the above ground storage tanks, at depths of 2 to 6 inches.
Background soil sample SS-29-SL was taken-from the northern portion of the Sigmon
property, approximately 20 feet from Eufola Road, at a depth of2 to 24 inches (Ref. 28).
Additional soil samples were collected in the overland flow pathway from the site
to characterize migration of site contaminants to surface water. These are the source
lccations described in Section 5.3 of this report entitled "Surface Water Pathway -Sample
Locations." These sample locations are marked on Figures 5 and 6. Soil samples SS-1 I-
SL and SS-13-SL were taken in the drainage ditch south of the Sigmon's site, north of
Lauren Drive. Soil sample SS-16-SD was collected in the intermittent stream west of the
Sigmon property. Soil sample SS-116-SD was collected in an upgradient intermittent
. stream as a background for sample SS-16-SD. All samples were analyzed by the North
Carolina State Laboratory of Public Health for volatile organics, metals, acid and
base/neutral extractables, and PCBs (Ref. 28; App. A).
6.4 Soil Analytical Results
Soil analytical results are the same as the analytical results presented in Section
3.2 of this report entitled "Waste/Source -Analytical Results" and Section 5.4 entitled
"Surface Water Pathway -Analytical Results." Results are included in Appendix A and
are summarized in Tables 8, 9, and 22.
Waste samples SS-23-WS and/or SS-24-WS collected from the waste pile
contained levels of2°butanone, benzene, 4-methyl 2-pentanone, toluene,
tetrachloroethene, chlorobenzene, ethyl benzene, xylenes, 1,4-dichlorobenzene, 1,2-
dichlorobenzene, and bis(2-ethylhexyl) phthalate above the EPA Soil Exposure
Benchmark levels in one or both samples (Tables 8; 9). Arsenic was detected above the
EPA Soil Exposure Benchmark in samples SS-19-SL, SS-23-WS, and SS-24-WS. The
levels of contaminants in all other soil exposure samples were below the benchmark
levels (Tables 8; 9; 22).
The levels of acetone, detected in almost every sample, were disqualified due to
:,7
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
the detection of the parameter in the trip blank' (App. A).
6.5 Air Monitoring
No formal air monitoring has been conducted at the site. During site visits in
November 1996, June 1997, and August 1997, no blowing dusts were observed at the
source areas (Refs. 5; 6; 29).
6.6 Conclusions
The primary activity occurring at this facility was the pumping of industrial,
commercial, and residential septic wastes into ten lagoons. Although some of the sludges
were removed from the lagoons, and the lagoons were backfilled with soil, the
contaminated sludges were left onsite in a waste pile. Sampling of the waste pile
revealed the presence of nine volatile organic,coinpounds and one semi-volatile organic
contaminant above the EPA Soil Exposure Benchmarks and five metals were identified at
levels that met the criteria for an observed release. Four metals were also detected at
levels that either exceed the bench;nark levels or met the criteria for an observed release
in one of the open pits present on the property (Tables 8; 9).
A barb wire fence lines the east and west sides of the property; however, there is
an opening on the east side, by the new mobile home park. The north side of the property
is not fenced, but access is somewhat limited by the presence of the Sigmon residence.
Access to the waste pile and open pits is open on the south side of the property and
unauthorized persons have entered the property with recreational vehicles (Refs. 5; 6).
There are no homes, schools, or daycares within 200 feet of contaminated soil at the
facility (Fig. 1 ). The facility is actively being used, however, for the operation of
Sigmon's Environmental Services, which employs five workers (Ref. 6). The active
work areas include one source area, the soil surrounding the above ground storage tanks.
The other source areas, the lagoon area, the waste pile, and the open pits are not within
200 feet of active work areas (Fig. 2).
7.0 SUMMARY AND CONCLUSlONS
The Sigmon's Septic Tanks Service combined Preliminary AssessmenUSite
Inspection was conducted to gather data necessary to evaluate the need for further
CERCLA/SARA remedial action at the site.
On August 25 and 26, 1997, sampling was conducted for the combined
Preliminary AssessmenUSite Inspection. Samples were collected from the former lagoon
area, the waste pile, the soil surrounding the above ground storage tanks, the open pits,
the overland flow pathways, the surface water pathways, and groundwater. Source areas
58
I
I
I
I
I
I
I
I
I
I
I
I I
I
I
I
I
I
I
I
were discovered to contain arsenic, 2-butanone, benzene, 4-methyl 2-pentanone, toluene,
tetrachloroethene, chlorobenzene, ethyl benzene, xylenes, 1,4-dichlorobenzene, 1,2-
dichlorobenzene, and bis(2-ethylhexyl) phthalate at levels exceeding the.EPA Health
Based Soil Exposure Benchmarks (Tables 8; 9). The work area of the five employees on
the facility property includes one source area, the storage tank area, in which bis(2-
ethylhexyl) phthalate was detected at elevated levels (Ref. 6). Public access on the south
side of the property has allowed unauthorized persons to enter the property nearest the
lagoon area and waste pile with recreational vehicles (Ref. 5).
The overland surface water pathway has been impacted by surface water runoff
from the source areas. Lead and manganese were detected at levels exceeding
background; however, the levels did not exceed the EPA Health Based Soil Exposure
Benchmarks. These contaminants are found in sources on site (Table 22). The sample
location in which lead was elevated, SS-11-SL, is moderately accessible to the public,
located within a drainage ditch in a residential area.
Two releases to surface water were documented within the surface water pathway.
At sample location SS-07-SW/SD, below PPE4 in the unnamed tributaray to the Catawba
River, manganese was detected at levels above background. Within the Davidson pond,
below PPE3, manganese, barium, lead, and chromium were dc~ccted above background
levels. Fisheries are present at the Davidson pond and in the unnamed tributary, below
sample location SS-07-SW/SD.
The PA/SI groundwater sampling analysis confirmed the results of many
historical groundwater sampling investigations, and that is groundwater has been
impacted near the Sigmon's site. Concentrations of lead, manganese, and/or mercury in
five of the seven drinking water wells sampled exceeded the EPA Drinking Water
Standards or North Carolina Groundwater Standards (Table 20). The North Carolina
Occupational and Environmental Epidemiology Section reviewed the results of sampling
and recommended that the Shepperd, Cascadden, and Potts wel!s not be used for drinking
water purposes (App. A)
Since there was no indication of blowing dusts, the threat posed by air migration
of particulates from sources at the facility is not significant. The consequent threat posed
to nearby targets through air migration of site contaminants is considered minimal.
Based upon the findings of the assessment, it is recommended that the Sigrnon's
Septic Tank Service site be the subject of an Expanded Site Inspection (ES!). The
primary concerns at the site are the effect the site has had on drinking water and the
apparent migration of contaminants to surface water pathways that arc used for
recreational fishing.
'>9
I ..
I
I
I
I
I
I
I ,
I
I
I
I
I
I
~
I
I
References
Sigmon's Septic Tank Service
Statesville, Iredell Co.; NC
US EPA ID: NCD 062 555 792
1. Wilson; Donna, Environmental Engineer, NC Superfund Section. Latitude and Longitude
<::alculation Worksheet, Sigmon's Septic Tank Service. November 6, 1997.
2. United State Dept. of Commerce, 196 I. Technical Paper No. 40: ifainfall Frequency
Atlas of the United States.
3. United State Dept. of Commerce, 1979. Climatic Atlas of the United States: National
Climatic Center, Asheville, NC,~
4. Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Tax plat map. September 1, 1998.
5. Moore, Douglas, Environmental Chemist, NC Superfund Section. Me:no to Fi),,_ Topic:
Removal evaluation and onsite reconnaissance. December 17, 1996.
6. Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Onsite reconnaissance. January 20, 1998 ..
7. Rhodes, Jerome H., Hazardous Waste Section, North Carolina Department of
Environment, Health, and Natural Resources. Letter to Grady W. Burgin, Pris:,~
Laboratories, Inc. Subject: Request for data. May 5, 1992.
8. Readling, Scott, Waste Management Specialist, North Carolina Hazardous Waste
Compliance Unit. Memo to Keith Masters, Western Area Supervisor, North Carolina
Hazardous Waste Compliance Unit. Topic: Site investigation. September 14, 1990.
9. Grayson, Susan C., Project Supervisor, North Carolina Departmei1t of Human Resources,
Division of Health Services. Minutes of Meeting. June 20, 1980.
I 0. North Carolina Department of Natural R~sources and Community Development. D,·illing
Well Record. September 8, 1980. Analytical sampling results, September 12, 1980.
11. Sigmon, Henry, applicant. EPA Hazardous Waste Notification Form, Part A, November
l 0, 1980. Subsequent correspondence: June 17, 1981, April 19, I 982.
12. North Carolina Department of Natural Resources and Community Development, Division
of Environmental Management Monitoring well sampling results. September 24, 1987,
June 14, 1990, May 5, 1993. Bold Research Labs. Monitoring well sampling results,
February 21, 1991.
I ..
I
I
I
I
I
I
I ,
I
I
I
I
I
I
a.
I
I
13. Holyfield, Doug. Head, Waste Management Branch, North Carolina Division of Solid
Waste Management. Memo to Dexter Matthews, Chief, Solid Waste Section. Subject:
Referral. February 11, 1993. ·
14. North Carolina Department of Natural Resources and Community Development, Division
of Environmental Management. Well Construction Record. August 31, 1987.
15. North Carolina Department of Natural Resources and Community Development, Division
of Environmental Management. Sample Analysis of Lagoon Sample. March 4, 1987.
16. North Carolina Solid Waste Management Section, Septage Management Program.
Applications and permits, A. A. A. Enterprises. May 12, 1989, December 11, 1989,
April 21, 1992, December 15, 1995, January 8, 1997, February 20, 1997.
17. DeRoller, Chris, Hydrogeologist, North Carolina Division of Environmental
Management. Letter to Barry Sigmon, A. °A. A. Enterprises. Subject : NOV. April 8,
1991.
· 18. DeRoller, Chris, Hydrogeologist, North Carolina Division of Environmental
Management. Letter to Scott Readling, Solid Waste Section.· Subject: Referral.
September 7, 1990.
19. Glaser, Bob, Pete Doorn, Gray Stephens, Laurie Martin, Lafayette Atkinson, North
Carolina Hazardous Waste Section. Field Notes and Sampling Analysis. August 31 and
September 1, 1992.
20. Smith, Brenda J., Regional Supervisor, North Carolina Division of Environmental
Management. Letter to Barry Sigmon. Subject: Notice of Violation. July 13, 1993.
21. Moore, Douglas, Environmental Chemist, North Carolina Superfund Section. Memo to
File. Subject: Removal Evaluation. December 12, 1996.
22. Burrows, Steven M., Project Manager, Shield Environmental Associates, Inc. Sigmon
Septic Pit Lagoon Sludge Sampling Report. November 3, 1993.
23. Sigmon, Barry D., Vice-President, A:A."A. Enterprises, Inc. Letter to Karen Walker,
North Carolina Department of Environment, Health, and Natural Resources. Subject:
Lagoon Closure Activities. April 26, 1995.
24. Connell, Karen, 1-lydrogeologist, North Carolina Division of Environmental Management.
·Memo to Pat DeRosa, North Carolina Superfund Section. Subject: Waste Pile referral.
December 15, 1995.
25. Homesley, T. C., Jr., Attorney, Homesley, Jones, Gaines, & Fields. Letter to Keith
Overcash, Regional Supervisor, North Carolina Division of Environmental Management.
I ..
I
I
I
I
I
I
I ,
I
I
I
I
I
I
It
I
I
26.
Subject: Termination of A. A. A. Enterprises. February 19, 1996.
DeRosa, Pat, Head, Site Assessment and Removal Branch, North Carolina Superfund
Section. Letter to Cindy Gurley, Project Officer, U.S. EPA Region IV. Subject:
CERCLIS Site Addition. December 12, 1996.
27. Lair, Myron D., Chief, Emergency Response and Removal Branch, U.S. EPA Region IV.
Letter to Jack Butler, North Carolina Superfund Section. Subject: Removal Eligibility.
April I, 1997.
28. Wilson, Donna, Environmental Engineer, North Carolina Superfund Section. Memo to
File. Subject: Preliminary Assessment/ Site Inspection. January 23, 1998.
29. Wilson, Donna, Environmental-Engineer, NC Superfund Section. Memo to File.
Subject: Onsite reconnaissance. June 19, 1997.
30. Superfund Chemical Data Matrix (SCDM). Appendix B-1, Table for Non-Radioactive
Hazardous Substances. August 19, 1996.
31. Guidelines for Responsible Party Voluntary Site Remedial Action, Inactive Hazardous
Sites Program, NCGEHNR. Table C-1: Soil Remediation Goals. October 1996.
32. Al Hanke, Chief, State Programs Section, US EPA Region IV. Memorandum to State
Directors, State Authorization Contacts, Rl'S Unit Chiefs, and RCS Unit Chiefs. Subject:
Guidance on Residential Lead-Based Paint, Lead-Contaminated Dust, and Lead
Contaminated Soil and Revised Interim Soil Lead Guidance for CERCLA sites and
RCRA Corrective Action Facilities. November I 6, 1994.
33. North Carolina Department of Conservation and Development. Geology and
Groundwater in the Statesville Area, North Carolina. Groundwater Bulletin Number 68.
Prepared by Harry E. LeGrand, Geologist, U. S. Geological Survey. 1954.
34. U. S. Dept. of Agriculture, Soil Conservation Service, 1989. Soil Survey oflredell
County, North Carolina.
35. North Carolina Division of Environment;!" Management. Sampling Analysis for the
Caseadden well. January 27, 1991, November 13, 1991, September I, 1992, February 22,
1993, March 6, 1995, September 5, 1996, April 8, I 997.
36. North Carolina Division of Environmental Management. Sampling Analysis for the
Shepperd well. February 22, 1993, March 15, 1994, March 6, 1995, October 10, 1995,
October 7, I 996, April 8, 1997.
37. North Carolina Division of Environmental Management. Sampling Analysis for the
Davidsons well. September 1, 1992, October 10, 1995, April 7, 1997.
I ..
I
I
I
I
I
I
I ,
I
I
I
I
I
I
It
I
I
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
North Carolina Division of Environmental Management. Sampling Analysis for the John
Lamberth well. August 4, 1994, April 17, 1996.
North Carolina Division of Environmental Management. Sampling Analysis for the
Steven Lamberth well. October 10, 1995.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. ·
§ubject: Public Water Supply Systems. November 13, 1997.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File.
Subject: Water Supply Lines. January 21, 1998.
U.S. Census Data, 1990. Average persons per household.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File.
Subject: Groundwater population calculation. January 21, 1998
Stanley, Jeanette, Environmental Chemist, NC Superfund Section. Memo to Superfund
Section Staff. Subject: Update on Status of Wellhead Protection Programs in N.C.
December I, 1997.
Federal Emergency Management Agency, National Flood Insurance Program.
Flood Insurance Rate Maps. Iredell County, NC. May 15, 1980.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Surface Water Drainage Area. February 4, 1998.
Wils~n, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Flow Rates 15 mile Surface Water Pathway. March 24, 1998.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Surface Water Intakes. March 25, 1998.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Fishery Identification along 15 mile SW_~:: July 24, 1997.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Memo to File. Topic:
Stream Classifications. June I 0, 1997.
Wilson, Donna, Environmental Engineer, NC Superfund Section.
Calculation of Wetland Acreage and Frontage. March 25, 199.8.
Wilson, Donna, Environmental Engineer, NC Superfund Section.
Endangered/Threatened Species. May 22, 1997.
Memo to File. Topic:
Memo to File. Topic:
I ..
I
I
I
I
I
I
I ,
I
I
I
I
I
I
" I
I
53.
54.
55.
56.
North Carolina Center for Geographic Information and Analysis. November 14, 1997.
North Carolina Administrative Code, Title 1 SA, Subchapter 2L. Classifications and
Water Quality Standards Applicable to the Groundwater of North Carolina. October 19,
1993.
' Rudo, Kenneth, Ph.D., Toxicologist, Medical Evaluation and Risk Assessment Branch,
Occupational and Environmental Epidemiology Section, North Carolina Department of
Environment, Health, and Natural Resources. Memorandum to Pat DeRosa, Head, Site
Evaluation and Removal Branch, North Carolina Department of Environment, Health,
and Natural Resources. Subject: Health Risk Evaluation. November I 0, 1997.
Wilson, Donna, Environmental Engineer, NC Superfund Section. Letter to Philip H.
Vorsatz, NC CERCLA Project Officer, US.EPA Region IV. Subject: Sampling Plan for
the Preliminary Assessment/Site Inspection. August 12, 1997.
":'.'•>-.,. ,~
I .. Photograph Log
I
Sigmon's Septic Tank Service
Statesville, Iredell Co., NC
US EPA ID: NCO 062 555 792
I I. November 16, 1996. Waste Pile.
I 2. November 16, 1996. Sigmon office and Sigmon home, as viewed from the waste pile
area.
I 3. November 16, 1996. Lagoon area.
4. November 16, 1996. Lagoon area.
I 5. November 16, 1996. Lagoon area.
I 6. November 16, 1996. View of dilapidated trailer and Cascadden trailer from the Sigmon
property.
I 7. November 16, 1996. Scattered waste on the property.
r 8. November 16, 1996.
9. November 16, 1996. Lagoon area.
I 10. November 16, 1996. Lagoon area.
I 11. November 16, 1996. Lagoon area.
12. November 16, 1996. Dilapidated trailer, Cascadden trailer, and Shepperd trailer.
I 13. November 16, 1996. Septic waste storage tanks and shed.
I 14. November 16, 1996. Scattered waste on the property.
15. November 16, 1996. Area of opening in fence on the southern boundary.
I 16. November 16, 1996. Eastern property boundary and Davidson rental house, at 172
Lauren Drive.
I 17. November 16, 1996. "Keep Out" sign posed along the southern property boundary.
' 18. November 16, 1996. Shepperd trailer and well.
I ..
I
I
I
I
I
I
I r
I
I
I
I
I
Photograph Log
Sigmon's Septic Tank Service
Page 2
19. November I 6, 1996. Shepperd well.
20. November 16, 1996. View of Sigmon property from Shepperd trailer.
2 I.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
November 16, 1996. View of Davidson rental houses from eastern property boundary.
Well house containing abandoned well behind 132 Lauren Drive is visible in field.
November 16, 1996. Waste pile seeps.
November 16, 1996. Lagoon area, western property boundary.
November 16, 1996.
November 16, 1996. Lagoon area.
November 16, 1996. Lagoon area.
November 16, 1996.
November 16, 1996. View of Davidson rental houses from eastern property boundary.
Well house containing abandoned well behind 132 Lauren Drive is visible in field.
Davidson house is large brown house in back. Davidson's roofing business is the large
white metal building.
November 16, 1996. Drums stored next to shed.
November 16, 1996. Drums stored next to shed.
August 14, 1997. Metal solidification basin.
August 14, 1997. Metal solidification basin.
August 14, 1997. Drums stored next to shed.
August 14, 1997. Drums stored next to shed.
August 14, 1997. Drums stored next to shed.
August 14, 1997. Drums stored in shed.
I
I
I
I
I
I
I ,
I
I
I
I
I
I
' I
I
Photograph Log
Sigmon's Septic Tank Service
Page 3
37. August 14, 1997. Drums stored in shed.
38. August 14, 1997. Drums stored in shed.
39. August 14, 1997. Septic waste storage tanks.
40. August 14, 1997. Septic waste storage tanks.
41. August 14, 1997. Man-made pond north of office. Source of fill dirt for lagoons.
42. August 25, 1997, PA/SI. Collection of SS-29-SL.
43. August 25, 1997, PA/SI. Collection of SS-30-SL.
44. August 25, 1997, PA/SI. Collection of SS-31-SL.
45. August 25, 1997, PA/SI. Collection of SS-02-PW, Mike James well.
46. August 25, 1997, PA/SI. Collection ofSS-21-WS-lagoon #3.
47. August 25, 1997, PA/SI. Sludge encountered in lagoon auger hole. Collection ofSS-35-
WS.
48. August 25, 1997, PA/SI. Collection ofSS-22-WS-lagoon #5.
49. August 25, 1997, PA/SI. Collection of SS-23-WS -waste pile.
50. August 25, 1997, PA/SI. Collection ofSS-25-WS and duplicate SS-125-WS-waste pile.
51. August 25, 1997, PA/SI. Collection of SS-24-WS -waste pile.
52. August 25, 1997, PA/SI. Collection of SS-24-WS -waste pile.
53. August 25, 1997, PA/SI. Collection of SS-26-SL -soil by the storage tanks.
54. August 25, 1997, PA/SI. Collection ofSS'-26-SL-soil by the storage tanks.
55. August 25, 1997, PA/SI. Collection ofSS-27-SL -soil by the storage tanks.
56. August 25, 1997, PA/SI. Collection of SS-28-SL -soil by the storage tanks.
I
I
I
I
I
I
I
I r
I
I
I
I
I
I
It
I
I
Photograph Log
Sigmon's Septic Tank Service
Page 4
57. August 25, 1997, PA/SI. Collection ofSS-28-SL-soil by the storage tanks.
58. August 25, 1997, PA/SI. Collection ofSS-18-SL-Open pit #1.
59.
60.
August 25, 1997, PA/SI. Collection of SS-13-SL -drainage ditch.
August 25, 1997, PA/SI. Collection of SS-09-SW/SD -background stream.
61. August 25, 1997, PA/SI. Collection of SS-09-SW/SD -background stream.
62. August 25, 1997, PA/SI. Collection of SS-09-SW/SD -background stream.
63. August 25, 1997, PA/SI. Collection of SS-08-SW/SD -background pond.
64. August 25, 1997, PA/SI. Collection of SS-08-SW/SD -background pond.
65. August 25, 1997, PA/SI. Collection of SS-08-SW/SD -background pond.
66. August 25, 1997, PA/SI. Collection ofSS-07-SW/SD -below PPE4.
67. August 25, 1997, PA/SI. Collection ofSS-07-SW/SD -below PPE4.
68. August 25, 1997, PA/SI. Wetland area above Williams pond.
69. August 25, 1997, PA/SI. Wetland area above Williams pond.
70. August 25, 1997, PA/SI. Wetland area above Williams pond.
71. August 25, 1997, PA/SI. Wetland area above Williams pond.
72. August 25, 1997, PA/SI. Collection of SS-17-SD -Williams pond.
73. August 25, I 997, PA/SI. Collection of SS-16-SW/SD -intermittent stream# I.
74. August 25, 1997, PA/SI. Collection of SS-16-SW/SD -intermittent stream #1.
75. August 25, 1997, PA/SI. Collection of SS-116-SW/SD -intermittent stream #2.
76. August 25, 1997, PA/SI. Collection ofSS-116-SW/SD -intermittent stream #2.
I
I
I
I
I
I
I r
I
I
I
Photograph Log
Sigmon's Septic Tank Service
Page 5
77.
78.
79.
August 25, 1997, PA/SJ. Small spring.
August 25, 1997, PA/SI. Collection ofSS-10-SW/SD and SS-110-SW/SD -Davidson
pond.
August 25, 1997, PA/SI. Collection of SS-10-SW/SD and SS-110-SW/SD -Davidson
pond.
80. August 25, 1997, PA/SJ. Collection ofSS-06-GW -Davidson monitoring well.
8 I. August 25, 1997, PA/SJ. Collection ofSS-06-GW -Davidson monitoring well.