Zion Ave Environmental Sampling 5_23_2014-OCR

Environmental Sampling
Zion Avenue Project
Cornelius, North Carolina
Geoscience Project No. CHl 4. 0045.EV
Prepared For:
Renaissance Square, Inc.
21225 Norman Shores Drive
Cornelius, North Carolina 28031
May 23, 2014
Prepared By:
GEQSCIENCE GROUP
500 Clanton Road, Suite K
Charlotte, North Carolina 28217
Phone [phone] Facsimile [phone]
May 23, 2014
Renaissance Square, LLC.
21225 Norman Shores Drive
GEQSCIENCE Cornelius, North Carolina 28031
GROUP
Attention: Mr. Pahl Davis
Reference: Environmental Sampling
Zion Avenue Project
Cornelius, North Carolina
Geoscience Project No. CH14.0045.EV
INTRODUCTION
Consulting Engineers
Geoscience is currently preparing a Phase I Environmental Site Assessment (ESA) of the subject
property. Research conducted as part of the Phase I BSA revealed that the subject site has
operated as a dry cleaning business since approximately 1922, prior to which the site had
operated as a Ford dealership and a livery stable. The purpose of this environmental sampling
event was to determine whether the property has been impacted by releases associated with dry
cleaning operations on the site.
ENVIRONMENTAL SAMPLING ACTIVITIES
On April 17, 2014, Geoscience mobilized to the site to monitor the installation of four (4)
Geoprobe borings (GP-1 through GP-4) on the property by Akers Environmental. The borings
were advanced at the locations shown on the Sample Location Diagram, included in Appendix I
as Drawing No. CH14.0045-A. Borings GP-1 and GP-2 were located to explore the possibility
of releases from an abandoned septic tank and several reported waste water tanks located behind
the building. Boring GP-3 was advanced adjacent to the discharge point of a floor drain located
near the existing dry cleaning machine. Boring GP-4 was located topographically down gradient
from borings GP-1 through GP-3 .
Each boring was advanced to a depth of approximately thirty-four (34) feet below the ground
surface (BGS), with continuous soil sampling conducted within the top fifteen (15) feet BGS .
Soil samples from depths of 2, 5, 10, and 15 feet BGS were selected for laboratory analysis. The
selected samples were placed in laboratory-provided containers, packed on ice, and transported
in a cooler under appropriate chain-of-custody procedures to Prism Laboratories, Inc. (Prism) of
Charlotte, North Carolina for chemical analysis. The sixteen (16) soil samples were analyzed for
volatile organic compounds (VOCs) EPA Method 8260. In addition, the samples were analyzed
for total petroleum hydrocarbons (TPH) in the gasoline (GRO) and diesel (DRO) ranges.
Following collection of the soil samples, borings GP-2, GP-3, and GP-4 were completed as one
(1) inch diameter temporary monitoring wells. The temporary wells were each set with a ten
(10) foot screened section with an eleven (11) foot sand filter pack. The temporary wells were
subsequently sampled in general accordance with NCDENR guidelines. After sample collection,
the temporary wells were properly abandoned. Copies of the Well Construction and
Abandonment Records are included in Appendix II.
500 Clanton Road
Suite K
Charlotte. North Carolina
28217
Telephone
704.525.2003
Facsimile
704.525.2051
Renaissance Square, LLC.
Geoscience Job No. CH14.0045.EV
May23, 2014
Page2
The three (3) groundwater samples (GP-2 through GP-4) were submitted to Prism Laboratories
and analyzed for VOCs and Semi-VOCs by EPA methods 6200B and 625, respectively. No
groundwater sample was collected at GP-1.
SAMPLE RESULTS
Soil Samples: The results of the soil sample analyses are listed on Table 1: Summary of Soil
Sampling Results (Appendix I). As shown, tetrachloroethylene (PCE) was detected in samples
GP-1-2, GP-1-10, GP-3-2, and GP-4-15 at concentrations ranging from 1.3 to 9.2 mg/kg. These
concentrations exceed the 0.005 mg/kg Preliminary Soil Remediation Goal (PSRG) established
by the NCDENR Inactive Hazardous Sites (IHS) Branch for protection of groundwater. In
addition, cis-1,2 dichloroethylene was detected in sample GP-2-10 at a concentration of 0.0023
mg/kg. However, this concentration does not exceed applicable PSRGs. No other chlorinated
solvents were detected in the soil samples.
The following petroleum VOCs were detected at concentrations above their respective PSRG in
samples GP-2-2 and GP-2-15: sec-butylbenzene; tert-butylbenzene; n-butylbenzene; 4-
isopropyltoluene; isopropylbenzene; naphthalene; n-propylbenzene; and 1,3,5-trimethylbenzene.
In addition, 1,2,4-trimethylbenzene concentrations in these two samples exceeded its commercial
health based PSRG of 52 mg/kg. Petroleum VOCs were also detected in samples GP-2-5, GP-2-
10, and GP-3-10 but at concentrations below NCDENR established PSRGs. No petroleum
VOCs were detected in the soil samples from GP-1 or GP-4.
Elevated TPH GRO and DRO concentrations were detected in samples GP-2-2, GP-2-15,
GP-4-5, and GP-4-15. Although PSRGs have not been established for TPH results, the elevated
TPH concentrations suggests that petroleum compounds not detectable EPA method 8260 may
be present at those locations.
Groundwater Samples: The results of the groundwater sample analysis are listed on Table 2:
Summary of Groundwater Sampling Results. As shown, PCE was detected in all three (3)
samples at concentrations ranging from 0.74 to 8.3 µg/L. These concentrations exceed the 0.7
µg/L North Carolina Groundwater Standard (2L Standard) established for PCE. In addition,
trichloroethylene; 1, 1, 1 thrichloroethane; 1, 1,2-trichloroethane; 1, 1-dichloroethane; 1,2-
dichloroethane; and 1, 1-dichloroethylene exceeded their respective 2L Standard in groundwater
sample GP-2. Other chlorinated compounds were detected in the groundwater samples, but at
concentration below their respective 2L Standards.
In addition to the chlorinated compounds, petroleum voes were detected in in all three (3)
groundwater samples. The petroleum compounds detected were generally consistent with those
encountered in the soil samples. However, none of the detected petroleum VOCs were present at
concentrations exceeding 2L standards. No Semi-VOCs compounds were detected in the water
samples. Copies of the laboratory test reports are included in Appendix III.
APPENDIX I
Figure No. CH14.0045-A -Sample Location Diagram
Table 1: Summary Of Soil Sampling Results
Table 2: Summary Of Groundwater Sampling Results
Table 1: Summary of Soil Sampling Results
Revision
Date:
Sample ID
GP-1-2
GP-1-5
GP-1-10
GP-1-15
GP-2-2
GP-2-5
GP-2-10
GP-2-15
GP-3-2
GP-3-5
GP-3-10
GP-3-15
GP-4-2
GP-4-5
GP-4-10
GP-4-15
5/23/2014
Analytical Method
Contaminant of Concern
Date Sample Sample
Collected Location Depth (ft)
4/17/2014 GP-1 2
4/17/2014 GP-1 5
4/17/2014 GP-1 10
4/17/2014 GP-1 15
4/17/2014 GP-2 2
4/17/2014 GP-2 5
4/17/2014 GP-2 10
4/17/2014 GP-2 15
4/17/2014 GP-3 2
4/17/2014 GP-3 5
4/17/2014 GP-3 10
4/17/2014 GP-3 15
4/17/2014 GP-4 2
4/17/2014 GP-4 5
4/17/2014 GP-4 10
4/17/2014 GP-4 15
Protection Of Groundwater PSRG
Residential Health Based PSRG
Commercial/Industrial Health Based PSRG
Notes: BRL -Below Reporting Limit
TPH
QJ QJ c: c: QJ QJ N N QJ c: c: 0 0 c: QJ QJ .8 .0 .0 a: a: QJ ~ ~ c (!) u :::> :::> <( CD CD 0 t QJ 2 (/)
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
570 1700 BRL 8.1 3.9
BRL BRL BRL BRL 0.0022 J
BRL BRL BRL 0.0082 0.0097
1200 1400 BRL 4.6 2.8
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL
BRL BRL 0.063 BRL BRL
14 5.8 BRL BRL BRL
BRL BRL BRL BRL BRL
31 13 BRL BRL BRL
NL NL 24 2.2 1.7
NL NL 12,000 1,600 1,600
NL NL 100,000 20,000 20,000
J -Detected At Concentration Below Reporting Limit, Result Is An Estimated Concentration
NL -Not Listed
QJ c: QJ QJ c: :::> QJ s N c: >. QJ c. .0 e ~ c. :::> 0 CD (/) C: ~
BRL BRL
BRL BRL
BRL BRL
BRL BRL
11 4.9
BRL BRL
0.0085 0.0030 J
7.2 3.3
BRL BRL
BRL BRL
BRL BRL
BRL BRL
BRL BRL
BRL BRL
BRL BRL
BRL BRL
0.68 2.4
NL 110
NL 110
PSRG -Inactive Hazardous Sites Branch Preliminary Soil Remediation Goal (From Table Dated January 2012)
Blue Shaded Cells Exceed Protection Of Groundwater PSRG
Yellow Shaded Cells Exceed Residential Health Based PSRG
Orange Shaded Cells Exceed Commercial/Industrial Health Based PSRG
QJ
QJ c: c: ~ QJ QJ c: N QJ c: ~ N QJ >. c: .0 QJ >. .c: .0 w >. c.
.c: e >. w c. .c: 0 .!E 1il ~
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL 1.5 BRL
BRL BRL BRL
0.0027 J 0.0060 BRL
0.30J 1.7 BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
BRL BRL BRL
8.1 1.3 16
5.4 270 5,600
27 270 28,000
EPA 8260 (mg/kg)
QJ QJ QJ
c: c: QJ c:
QJ QJ QJ c: QJ
c: N N :§ QJ >.
QJ QJ c: c: QJ >. .c: c: N QJ QJ .8 c: 1il QJ c: .0 .0 QJ QJ .c: e iii QJ >. >. c: >. 1il
.0 .c: .c: ui Cll e 0 .c: >. 1il 1il QJ >. ~ :c :E c: ~ 0 c. c. E E QJ c. :c u
Cll e ~ ~ >. 0 ~ u 0 z q. x E ~ N_
c: """ L() 1il ~ ~ ~ I-' (/)
~ ~ ·u
BRL BRL BRL BRL BRL BRL BRL 1.3 J BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL BRL BRL 9.2 BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
0.46J 4.8 97 9.8 BRL BRL BRL BRL BRL
0.0033 J BRL 0.018 0.0038 J BRL BRL BRL BRL BRL
0.0067 J 0.012 0.26 0.099 0.024 0.014 0.0095 BRL 0.0023 J
0.56J 4.2 63 33 0.65J 0.32J 0.33J BRL BRL
BRL BRL BRL BRL BRL BRL BRL 3.4 BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL 0.0026 J BRL 0.0026 J BRL BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL BRL BRL BRL BRL
BRL BRL BRL BRL BRL BRL BRL 1.7 J BRL
0.21 1.5 6.7 6.7 5.8 NL NL .005 0.36
3.6 260 12 160 130 140 120 17 32
18 260 52 180 260 430 390 82 400
Revision
Date·
Wellllll
GP-2
GP-3
GP-4
Notes:
Table 2: Summary of Groundwater Sampling Results
5/23/2014
Analytical Method
Q) Q) c: c: Q) Q) Q) N N c: Contaminant of Concern c: c: Q) Q) Q) Q) .0 .0 N~ c: c: Q) Q) >->-Q) c: Cii .s:::: .s:::: .0 Q) Qi Qi >-E .s:::: :E E E c. :J c. ·;:: ·;:: e o <O Bate Bepth to Wate1 I-;-I-;-c. ~ z Sample Ill> 0 "'" LO !E Collected (ft) <'[ ~
~ ~
4/17/2014 GP-2 Approximately 26 8.5 0.71 0.6 J 25 to 28
4/17/2014 GP-3 Approximately BRL BRL 1.5 BRL 25 to 28
4/17/2014 GP-4 Approximately BRL BRL BRL BRL 25 to 28
NC 2L Standard 400 400 70 6
BRL -Below Reporting Limit
J -Detected At Concentration Below Reporting Limit, Result Is An Estimated Concentration
N/A -Not Applicable
Yellow Shaded Cells Exceed North Carolina Groundwater (2L) Standard
EPA 6200B (µg/L)
Q)
Q) Q) c: Q) c: c: <O c: Q) Q) (/) .s:::: Q) Q) Qi N N N c: c: c: c: Q) e Q) Q) Q) c: Q)
.0 .0 .0 Q) >-0 z. z. :J x ::c >-0 .\2 c. :J :J JS e []J []J I-t7 0.. 0 t 0 I-~-C: Q) 2 (/) '": ~
0.71 3.1 9.5 0.53 0.57 J 1.8
BRL 2.0 8.5 0.62 BRL BRL
BRL BRL BRL 0.51 BRL BRL
70 70 70 600 500 200
EPA 625
(µg/L)
Q)
Q) Q) c: Q) c: Q) Q) c: Q) c: Q) <O c: c: Q) >-Q) c: .s:::: <O <O >-.s:::: >-Q) Qi .s:::: .s:::: Qi E Qi Qi .s:::: .s:::: >-e Qi e Qi e e .£ £ Target 0 e 0 e e Q) ::c 0 0 ::c e tl ::c ::c 0 tl 0 0 Compounds ·;:: tl tl ::c i5 ::c ::c 0
I-;-9 i5 tl () tl ::c 9 .N_ ~ tl "!. .N_ ~ ~ ~ Qi ~-...: ~ ~-.;, I-~ ~ ·u
4.9 27 3.3 860 6.6 1.6 4.7 11 BRL
BRL BRL BRL 7.3 4.2 BRL 8.3 0.87 BRL
BRL BRL BRL 0.94 BRL BRL 0.74 BRL BRL
0.6 6 0.4 350 70 70 0.7 3 •HA
APPENDIX II
Temporary Well Construction Records
Temporary Well Abandonment Records
APPENDIX III
Laboratory Reports
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