WS-6499_24548_CA_MRP_20200302

DRAFT

GROUNDWATER MONITORING REPORT
NCDEQ UST INCIDENT NO.: 24548
WILKES TEXACO
100 WEST MAIN STREET WILKESBORO, WILKES COUNTY, NORTH CAROLINA
ECS PROJECT No.: 49:6571-C

PREPARED FOR:
NCDEQ, DIVISION OF WASTE MANAGEMENT, UST SECTION
MARCH 2, 2020

March 2, 2020
Ms. Linda Blalock NCDEQ, Division of Waste Management, UST Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646
Reference: Groundwater Monitoring Report Wilkes Texaco
100 West Main Street Wilkesboro, Wilkes County, North Carolina NCDEQ Incident No. 24548 NCDEQ Contract No. N17006
ECS Project No. 49:6571-C Dear Ms. Blalock:
As authorized by your acceptance of ECS Southeast, LLP’s (ECS) Task Authorization Request No. 4 dated and approved October 23, 2019, ECS Southeast, LLP (ECS) has completed this report for the above referenced site. Included in this report is a description of the field activities,
the results obtained, and our conclusions and recommendations. ECS appreciates the opportunity to provide our environmental consulting services to you on this
project. If you have any questions concerning this report or this project, please contact us at [phone]. Sincerely,

ECS SOUTHEAST, LLP

Scott Young, P.G. Roger A. Smith, P.G. Environmental Project Manager Principal Geologist [e-mail] [e-mail]
704-525-5152 704-525-5152
DRAFT
TABLE OF CONTENTS

1.0 SITE INFORMATION ..................................................................................................................1 2.0 SITE HISTORY AND CHARACTERIZATION .............................................................................3 3.0 FIELD ACTIVITIES ......................................................................................................................4 3.1 Groundwater Flow Measurements ...................................................................................4
3.2 Monitoring Well Sampling .................................................................................................4 3.3 Receptor Survey Update ..................................................................................................4 3.4 Groundwater Analytical Results........................................................................................4 4.0 CONCLUSIONS AND RECOMMENDATIONS ...........................................................................5 FIGURES Figure 1 USGS Topographic Map Figure 2 Site Map
TABLES Table 1 Monitoring Well Construction and Liquid Level Data Table 2 Summary of Groundwater Analytical Results

APPENDICIES
Appendix A Photographic Log Appendix B Laboratory Analytical Report and Chain-of-Custody Form

Groundwater Monitoring Report Wilkes Texaco NCDEQ Incident No. 24548
100 West Main Street Wilkesboro, Wilkes County, North Carolina March 2, 2020

1
1.0 SITE INFORMATION
Site Name and Location: Wilkes Texaco 100 West Main Street Wilkesboro, Wilkes County, North Carolina
Incident #: 24548 UST #: WS-6499
Facility ID#: 00-0-0000006768
Latitude and Longitude: 36.153679° North, -81.141860° West Date of Report: March 2, 2020
Land Use Category: Commercial Primary Contact: Ms. Linda Blalock
NCDEQ, Division of Waste Management, UST Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646
Primary Consultant: ECS Southeast, LLP 1812 Center Park Drive, Suite D Charlotte, North Carolina 28217
[phone] Attention: Scott Young, P.G. Analytical Laboratory: Con-Test Analytical Laboratory
39 Spruce Street East Longmeadow, North Carolina 27107 [phone] Laboratory Certification No.: 25703
Groundwater Monitoring Report Wilkes Texaco NCDEQ Incident No. 24548
100 West Main Street Wilkesboro, Wilkes County, North Carolina March 2, 2020

3
2.0 SITE HISTORY AND CHARACTERIZATION

The site is located at 100 West Main Street, Wilkesboro, Wilkes County, North Carolina (Figures
1 and 2). The site was formerly a Texaco gas station. Photographs of the site are included in Appendix A. Based on information provided to ECS, two 4,000-gallon gasoline and one 2,000-gallon gasoline
USTs were removed from the site in June 2002. Two 1,000-gallon USTs were closed in place at the site in June 2002. A 550-gallon heating oil UST was still in service at the site in 2008 and a waste oil UST of unknown size was also still in service at that time; however, both were closed in
place in July 2019. Soil contamination was discovered upon removal of the three gasoline USTs with total petroleum hydrocarbons (TPH) detected in the soil samples from 1.0 mg/kg to 9,660 mg/kg. Approximately
83 tons of contaminated soil was excavated from the tank basin and disposed of off-site. A receptor survey was conducted in June 2003. No water supply wells were identified within
1,000 feet of the source area during the receptor survey and municipal water was noted to be provided to each property within 1,000 feet of the source area. In 2008, a monitoring well was installed onsite and multiple petroleum hydrocarbons were
detected in the groundwater sample collected from the monitoring well above their respective Gross Contamination Levels (GCLs). In 2009, two aggressive fluid vapor recovery (AFVR) events were conducted on monitoring well MW-1. ECS sampled monitoring well MW-1 in January 2019 and detected multiple petroleum
hydrocarbons above their respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS).
On August 6, 2019, ECS observed the in-place closure of the one 550-gallon heating oil UST and
one waste oil UST of unknown size.

As determined from the USGS Topographic Map, Wilkesboro, North Carolina Quadrangle
(Figure 1), the site is at an approximate elevation of 1,040 feet above mean sea level. The
Yadkin River is located approximately 1,500 feet north of the site and Club Creek is located
approximately 1,500 feet south-southeast of the site. Surface runoff on the site is generally to the north-northwest.
According to the Geologic Map of North Carolina (1981), the subject site is situated in the Piedmont Physiographic Province. The soils encountered in this area are the residual product of in-place chemical weathering of rock presently underlying the site. In general, shallow unconfined groundwater movement within the overlying soils is controlled largely by topographic gradients.
However, as the groundwater percolates downward to the bedrock, it becomes controlled by the orientation of the rock fracture systems. Thus, the direction of groundwater movement may not be consistent with the reflecting topography. Recharge occurs primarily by infiltration along higher
elevations and typically discharges into streams or other surface water bodies. The elevation of
Groundwater Monitoring Report Wilkes Texaco NCDEQ Incident No. 24548
100 West Main Street Wilkesboro, Wilkes County, North Carolina March 2, 2020

4
the shallow water table is transient and can vary with seasonal fluctuations in precipitation. Movement of groundwater under water table conditions is generally from higher to lower elevations. As such, shallow groundwater would be expected to flow to the north-northwest
beneath the site. 3.0 FIELD ACTIVITIES 3.1 Groundwater Flow Measurements On November 14, 2019, ECS measured the static water level in MW-1 using a decontaminated electronic water level meter. The depth to water was measured at 38.61 feet below top of casing (ft btoc). The well construction information and static water level measurement can be found on Table 1.

3.2 Monitoring Well Sampling
On November 14, 2019, ECS personnel collected a groundwater sample from monitoring well MW-
1. The location of the monitoring well is shown on Figure 2. Prior to sampling, the well was purged using a new disposable polyethylene bailer and new length of nylon cord. The well was developed/purged by evacuating a minimum of three well volumes using the bailer and cord. The well was developed/purged to remove sand, silt, and other fine sediments and to promote
communication between the surrounding formation and the sand pack surrounding the well’s screened interval. After purging was completed, the sample was placed into laboratory prepared containers. Each container was labeled and placed in a cooler containing ice to maintain the
samples at approximately four degrees Celsius. The sample containers were then submitted to Con-Test Analytical Laboratory in East Longmeadow, Massachusetts to be analyzed for volatile organic compounds using Standard Method 6200B. A Chain of Custody Record was maintained and is included in Appendix B. 3.3 Receptor Survey Update
Following collection of the groundwater sample on November 14, 2019, ECS conducted a receptor survey update within 1,000 feet of the source area. No water supply wells were identified within 1,000 feet of the source area. In addition, municipal water is available to each property within 1,000 feet of the source area.
3.4 Groundwater Analytical Results Review of the laboratory analytical results of the sample collected from monitoring well MW-1 identified several compounds at concentrations greater than their respective NCLGWQS but
below their respective Gross Contaminant Level (GCL). Additional compounds were identified at concentrations greater than the laboratory method detection limits, but less than their respective NC2LGWQS. A copy of the laboratory analytical report and COC are included in Appendix B.
Groundwater Monitoring Report Wilkes Texaco NCDEQ Incident No. 24548
100 West Main Street Wilkesboro, Wilkes County, North Carolina March 2, 2020

5
4.0 CONCLUSIONS AND RECOMMENDATIONS
Compound concentrations identified in the sample collected from monitoring well MW-1 in November 2019 increased as compared to those identified in the sample collected in January 2019. The increase in compound concentrations may be attributed to an increase in the measured
groundwater level in monitoring well MW-1, which was approximately 10 feet higher in November 2019 than that measured in monitoring well MW-1 in January 2019. ECS recommends collecting an additional sample from monitoring well MW-1 in approximately six months (May 2020) to evaluate if the compound concentrations are continuing to increase. If the compound
concentrations decrease or remain stable, as the site meets the criteria for a Low risk classification, the site may be granted a status of No Further Action with a Notice of Residual Petroleum.
ECS also recommends that the current property owner be provided a copy of this report for their records.

FIGURES
SOURCE:
USGS TOPOGRAPHIC MAP
WILKESBORO, NORTH CAROLINA
QUADRANGLE, DATED 1966 AND REVISED
1981
FIGURE 1
USGS TOPOGRAPHIC MAP
WILKES TEXACO
100 WEST MAIN STREET
WILKESBORO, WILKES COUNTY, NC
NCDEQ INCIDENT NO.: 24548
ECS PROJECT NO. 49:6571-C
SITE
2,000’
SOURCE:
Geological Resources Field Notes
Dated 2009
FIGURE 2
SITE MAP
WILKES TEXACO
100 WEST MAIN STREET
WILKESBORO, WILKES COUNTY, NC
NCDEQ INCIDENT NO.: 24548
ECS PROJECT NO. 49:6571-C20’
Former Store
Former USTs
Dispenser
Island
MW-1
Monitoring Well Location

TABLES
TABLE 1
MONITORING WELL CONSTRUCTION AND LIQUID LEVEL DATA
WILKES TEXACO
WILKESBORO, WILKES COUNTY, NORTH CAROLINA
NCDEQ INCIDENT No. 24548
ECS PROJECT 49:6571-C
WELL ID SCREENED
INTERVAL
(ft bgs)
APPROXIMATE
WELL DEPTH
(ft bgs)
TOP OF
CASING
ELEVATION
(ft bgs)
DATE
WATER
LEVEL
MEASURED
DEPTH TO
WATER
FROM TOP
OF CASING
(ft BTOC)
GROUNDWATER
ELEVATION (ft)
01/02/19 48.76 NA
11/14/19 38.61 NA
Notes:
ft bgs = feet below ground surface
ft BTOC = feet below top-of-casing
ft = feet
NM = Not measured
NA = Not applicable
33.0 - 53.0 53 NMMW-1
TABLE 2
SUMMARY OF GROUNDWATER ANALYTICAL RESULTSWILKES TEXACO
WILKESBORO, WILKES COUNTY, NORTH CAROLINA
NCDEQ INCIDENT No. 24548
ECS PROJECT 49:6571-C
Voaltile Organic Compounds by Standard Method 6200B
AcetoneBenzenen-ButylbezeneDiisopropyl etherEthylbenzeneIsopropylbenzeneMethyl ethyl ketoneMethyl tert butyl etherNaphthalenen-PropylbenzeneTolueneStyreneTetrachloroethene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneTotal XylenesNC2LGWQS 6,000 1 70 70 600 20 4,000 20 6 70 600 70 0.7 400 400 500
GCL 6,000,000 5,000 6,900 25,000 84,500 20,000 4,000,000 20,000 6,000 30,000 260,000 70,000 700 28,500 25,000 85,500
01/02/19 NA 1,150 <2.0 <2.0 450 25.5 NA 3,100 296 50.7 3,280 5.9 <2.0 497 224 476
11/14/19 830 J 3,700 62 J 42 J 1,600 90 J 530 J 1,900 1,500 150 9,500 <100 36 J 1,100 390 6,900
Notes:
Only compounds detected are shown
Results presented in micrograms per liter (µg/L)
NC2LGWQS = North Carolina 2L Groundwater Standard
GCL = Gross Contamination Level
NA = Not analyzed for compound
J = Estimated concentration detected between laboratory method reporting limit and detection limit
VALUE = concentration exceeds laboratory method reporting limit
VALUE = concentration exceeds NC2LGWQS
VALUE = concentration exceeds GCL
Sample ID Sample Date
MW-1

APPENDIX A

PHOTOGRAPH LOG
WILKES TEXACO
100 WEST MAIN STREET
WILKESBORO, WILKES COUNTY, NORTH CAROLINA
ECS PROJECT NO. 49-6571-C
Photograph 1: View of the Site
Photograph 2: View of monitoring well MW-1

APPENDIX B

39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
November 26, 2019
Don Randall Marlor
ECS Southeast - Asheville, NC
1900 Hendersonville Road, Suite 10
Asheville, NC 28806
Project Location: Wilkes Texaco
Client Job Number:
Project Number: 49:6571-C
Laboratory Work Order Number: 19K0993
Enclosed are results of analyses for samples received by the laboratory on November 15, 2019. If you have any questions
concerning this report, please feel free to contact me.
Sincerely,
Kerry K. McGee
Project Manager
Page 1 of 18
Table of Contents
Table of Contents
Sample Summary 3
Hits Only Report 4
Case Narrative 5
Sample Results 6
19K0993-01 6
Sample Preparation Information 8
QC Data 9
Volatile Organic Compounds by GC/MS 9
B246742 9
Flag/Qualifier Summary 13
Certifications 14
Chain of Custody/Sample Receipt 16
Page 2 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL SUMMARY
11/26/2019
ECS Southeast - Asheville, NC
1900 Hendersonville Road, Suite 10
Asheville, NC 28806
ATTN: Don Randall Marlor
49:6571-C
19K0993
The results of analyses performed on the following samples submitted to the CON-TEST Analytical Laboratory are found in this report.
PROJECT LOCATION:
PURCHASE ORDER NUMBER:
PROJECT NUMBER:
REPORT DATE:
WORK ORDER NUMBER:
FIELD SAMPLE #LAB ID:MATRIX TESTSAMPLE DESCRIPTION SUB LAB
Wilkes Texaco
MW1 19K0993-01 Ground Water SM21-22 6200B
[TOC_1]Sample Summary[TOC]
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
[TOC_1]Hits Only Report[TOC]EXECUTIVE SUMMARY
Client ID:Lab ID:
Analyte Results/Qual RL Units Method
19K0993-01MW1
DL
1,2,4-Trimethylbenzene 1100 100 g/L SM21-22 6200B36
1,3,5-Trimethylbenzene 390 100 g/L SM21-22 6200B28
2-Butanone (MEK)530 1000 g/L SM21-22 6200BJ390
Acetone 830 10000 g/L SM21-22 6200BJ760
Benzene 3700 100 g/L SM21-22 6200B36
Diisopropyl Ether (DIPE)42 100 g/L SM21-22 6200BJ34
Ethylbenzene 1600 100 g/L SM21-22 6200B26
Isopropylbenzene (Cumene)90 100 g/L SM21-22 6200BJ34
m+p Xylene 4800 200 g/L SM21-22 6200B60
Methyl tert-Butyl Ether (MTBE)1900 100 g/L SM21-22 6200B50
Naphthalene 1500 100 g/L SM21-22 6200B62
n-Butylbenzene 62 100 g/L SM21-22 6200BJ42
n-Propylbenzene 150 100 g/L SM21-22 6200B26
o-Xylene 2100 100 g/L SM21-22 6200B34
Tetrachloroethylene 36 100 g/L SM21-22 6200BJ36
Toluene 9500 100 g/L SM21-22 6200B28
Con-Test does not accept liability for the consequences of any actions taken solely on the basis of the information provided in the Executive Summary
section of this report. Users must review this report in its entirety to determine data usability and assessment.
Page 4 of 18
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CASE NARRATIVE SUMMARY
All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report.
For method 6200B, elevated reporting limits for sample(s) 19K0993-01 due to a high concentration of target compounds.
[TOC_1]Case Narrative[TOC]
SM21-22 6200B
Qualifications:
Laboratory fortified blank/laboratory control sample recovery and duplicate recoveries outside of control limits. Data validation is not
affected since all results are "not detected" for associated samples in this batch and bias is on the high side.
Analyte & Samples(s) Qualified:
L-02
Ethanol
B246742-BS1, B246742-BSD1
Laboratory fortified blank/laboratory control sample recovery and duplicate recovery are outside of control limits. Reported value for this
compound is likely to be biased on the low side.
Analyte & Samples(s) Qualified:
L-04
2,2-Dichloropropane
19K0993-01[MW1], B246742-BLK1, B246742-BS1, B246742-BSD1
Either laboratory fortified blank/laboratory control sample or duplicate recovery is outside of control limits, but the other is within limits. RPD
between the two LFB/LCS results is within method specified criteria.Analyte & Samples(s) Qualified:
L-07
Bromomethane
B246742-BS1
Elevated reporting limit due to high concentration of target compounds.
Analyte & Samples(s) Qualified:
RL-11
19K0993-01[MW1]
The results of analyses reported only relate to samples submitted to the Con-Test Analytical Laboratory for testing.
I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed
in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the
best of my knowledge and belief, accurate and complete.
Lisa A. Worthington
Technical Representative
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Date Received: 11/15/2019
Work Order: 19K0993Sample Description:Project Location: Wilkes Texaco
Sample ID: 19K0993-01
Field Sample #: MW1
Sample Matrix: Ground Water
Sampled: 11/14/2019 15:45
[TOC_2]19K0993-01[TOC]
AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
DL Units
Date
PreparedMethod
Sample Flags: RL-11 Volatile Organic Compounds by GC/MS
830 10000 11/23/19 11:05 LBDg/L760 11/22/19SM21-22 6200B200JAcetone
3700 100 11/23/19 11:05 LBDg/L36 11/22/19SM21-22 6200B200Benzene
ND 100 11/23/19 11:05 LBDg/L30 11/22/19SM21-22 6200B200Bromobenzene
ND 200 11/23/19 11:05 LBDg/L64 11/22/19SM21-22 6200B200Bromochloromethane
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B200Bromodichloromethane
ND 100 11/23/19 11:05 LBDg/L92 11/22/19SM21-22 6200B200Bromoform
ND 1000 11/23/19 11:05 LBDg/L160 11/22/19SM21-22 6200B200Bromomethane
530 1000 11/23/19 11:05 LBDg/L390 11/22/19SM21-22 6200B200J2-Butanone (MEK)
62 100 11/23/19 11:05 LBDg/L42 11/22/19SM21-22 6200B200Jn-Butylbenzene
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B200sec-Butylbenzene
ND 100 11/23/19 11:05 LBDg/L34 11/22/19SM21-22 6200B200tert-Butylbenzene
ND 100 11/23/19 11:05 LBDg/L22 11/22/19SM21-22 6200B200Carbon Tetrachloride
ND 100 11/23/19 11:05 LBDg/L30 11/22/19SM21-22 6200B200Chlorobenzene
ND 20000 11/23/19 11:05 LBDg/L2100 11/22/19SM21-22 6200B200Ethanol
ND 100 11/23/19 11:05 LBDg/L42 11/22/19SM21-22 6200B200Chlorodibromomethane
ND 100 11/23/19 11:05 LBDg/L70 11/22/19SM21-22 6200B200Chloroethane
ND 100 11/23/19 11:05 LBDg/L34 11/22/19SM21-22 6200B200Chloroform
ND 120 11/23/19 11:05 LBDg/L90 11/22/19SM21-22 6200B200Chloromethane
ND 100 11/23/19 11:05 LBDg/L24 11/22/19SM21-22 6200B2002-Chlorotoluene
ND 100 11/23/19 11:05 LBDg/L28 11/22/19SM21-22 6200B2004-Chlorotoluene
ND 100 11/23/19 11:05 LBDg/L38 11/22/19SM21-22 6200B2001,2-Dibromoethane (EDB)
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B2001,2-Dichlorobenzene
ND 100 11/23/19 11:05 LBDg/L24 11/22/19SM21-22 6200B2001,3-Dichlorobenzene
ND 100 11/23/19 11:05 LBDg/L26 11/22/19SM21-22 6200B2001,4-Dichlorobenzene
ND 100 11/23/19 11:05 LBDg/L52 11/22/19SM21-22 6200B200Dichlorodifluoromethane (Freon 12)
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B2001,1-Dichloroethane
ND 100 11/23/19 11:05 LBDg/L82 11/22/19SM21-22 6200B2001,2-Dichloroethane
ND 100 11/23/19 11:05 LBDg/L64 11/22/19SM21-22 6200B2001,1-Dichloroethylene
ND 100 11/23/19 11:05 LBDg/L26 11/22/19SM21-22 6200B200cis-1,2-Dichloroethylene
ND 100 11/23/19 11:05 LBDg/L62 11/22/19SM21-22 6200B200trans-1,2-Dichloroethylene
ND 100 11/23/19 11:05 LBDg/L40 11/22/19SM21-22 6200B2001,2-Dichloropropane
ND 100 11/23/19 11:05 LBDg/L22 11/22/19SM21-22 6200B2001,3-Dichloropropane
ND 100 11/23/19 11:05 LBDg/L40 11/22/19SM21-22 6200B200L-042,2-Dichloropropane
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B2001,1-Dichloropropene
ND 100 11/23/19 11:05 LBDg/L26 11/22/19SM21-22 6200B200cis-1,3-Dichloropropene
ND 100 11/23/19 11:05 LBDg/L46 11/22/19SM21-22 6200B200trans-1,3-Dichloropropene
42 100 11/23/19 11:05 LBDg/L34 11/22/19SM21-22 6200B200JDiisopropyl Ether (DIPE)
1600 100 11/23/19 11:05 LBDg/L26 11/22/19SM21-22 6200B200Ethylbenzene
ND 1000 11/23/19 11:05 LBDg/L300 11/22/19SM21-22 6200B2002-Hexanone (MBK)
90 100 11/23/19 11:05 LBDg/L34 11/22/19SM21-22 6200B200JIsopropylbenzene (Cumene)
ND 100 11/23/19 11:05 LBDg/L40 11/22/19SM21-22 6200B200p-Isopropyltoluene (p-Cymene)
1900 100 11/23/19 11:05 LBDg/L50 11/22/19SM21-22 6200B200Methyl tert-Butyl Ether (MTBE)
ND 1000 11/23/19 11:05 LBDg/L68 11/22/19SM21-22 6200B200Methylene Chloride
ND 1000 11/23/19 11:05 LBDg/L330 11/22/19SM21-22 6200B2004-Methyl-2-pentanone (MIBK)
[TOC_1]Sample Results[TOC]
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Date Received: 11/15/2019
Work Order: 19K0993Sample Description:Project Location: Wilkes Texaco
Sample ID: 19K0993-01
Field Sample #: MW1
Sample Matrix: Ground Water
Sampled: 11/14/2019 15:45
AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
DL Units
Date
PreparedMethod
Sample Flags: RL-11 Volatile Organic Compounds by GC/MS
1500 100 11/23/19 11:05 LBDg/L62 11/22/19SM21-22 6200B200Naphthalene
150 100 11/23/19 11:05 LBDg/L26 11/22/19SM21-22 6200B200n-Propylbenzene
ND 100 11/23/19 11:05 LBDg/L22 11/22/19SM21-22 6200B200Styrene
ND 100 11/23/19 11:05 LBDg/L44 11/22/19SM21-22 6200B2001,1,2,2-Tetrachloroethane
36 100 11/23/19 11:05 LBDg/L36 11/22/19SM21-22 6200B200JTetrachloroethylene
9500 100 11/23/19 11:05 LBDg/L28 11/22/19SM21-22 6200B200Toluene
ND 200 11/23/19 11:05 LBDg/L110 11/22/19SM21-22 6200B2001,2,3-Trichlorobenzene
ND 100 11/23/19 11:05 LBDg/L80 11/22/19SM21-22 6200B2001,2,4-Trichlorobenzene
ND 100 11/23/19 11:05 LBDg/L40 11/22/19SM21-22 6200B2001,1,1-Trichloroethane
ND 100 11/23/19 11:05 LBDg/L32 11/22/19SM21-22 6200B2001,1,2-Trichloroethane
ND 100 11/23/19 11:05 LBDg/L48 11/22/19SM21-22 6200B200Trichloroethylene
ND 100 11/23/19 11:05 LBDg/L66 11/22/19SM21-22 6200B200Trichlorofluoromethane (Freon 11)
ND 100 11/23/19 11:05 LBDg/L50 11/22/19SM21-22 6200B2001,2,3-Trichloropropane
1100 100 11/23/19 11:05 LBDg/L36 11/22/19SM21-22 6200B2001,2,4-Trimethylbenzene
390 100 11/23/19 11:05 LBDg/L28 11/22/19SM21-22 6200B2001,3,5-Trimethylbenzene
ND 4000 11/23/19 11:05 LBDg/L2000 11/22/19SM21-22 6200B200Vinyl Acetate
ND 100 11/23/19 11:05 LBDg/L90 11/22/19SM21-22 6200B200Vinyl Chloride
4800 200 11/23/19 11:05 LBDg/L60 11/22/19SM21-22 6200B200m+p Xylene
2100 100 11/23/19 11:05 LBDg/L34 11/22/19SM21-22 6200B200o-Xylene
Surrogates % Recovery Recovery Limits Flag/Qual
1,2-Dichloroethane-d4 92.7 11/23/19 11:0570-130
Toluene-d8 99.9 11/23/19 11:0570-130
4-Bromofluorobenzene 102 11/23/19 11:0570-130
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Sample Extraction Data
Prep Method: SW-846 5030B-SM21-22 6200B
Lab Number [Field ID]Batch DateInitial [mL]Final [mL]
B246742 11/22/190.025 5.0019K0993-01 [MW1]
[TOC_1]Sample Preparation Information[TOC]
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by GC/MS - Quality Control
QUALITY CONTROL
[TOC_2]Volatile Organic Compounds by GC/MS[TOC]
Batch B246742 - SW-846 5030B
[TOC_3]B246742[TOC]
Blank (B246742-BLK1) Prepared: 11/22/19 Analyzed: 11/23/19
Acetone g/L50ND
Benzene g/L0.50ND
Bromobenzene g/L0.50ND
Bromochloromethane g/L0.50ND
Bromodichloromethane g/L0.50ND
Bromoform g/L0.50ND
Bromomethane g/L1.0ND
2-Butanone (MEK)g/L5.0ND
n-Butylbenzene g/L0.50ND
sec-Butylbenzene g/L0.50ND
tert-Butylbenzene g/L0.50ND
Carbon Tetrachloride g/L0.50ND
Chlorobenzene g/L0.50ND
Ethanol g/L50ND
Chlorodibromomethane g/L0.50ND
Chloroethane g/L0.50ND
Chloroform g/L0.50ND
Chloromethane g/L0.60ND
2-Chlorotoluene g/L0.50ND
4-Chlorotoluene g/L0.50ND
1,2-Dibromoethane (EDB)g/L0.50ND
1,2-Dichlorobenzene g/L0.50ND
1,3-Dichlorobenzene g/L0.50ND
1,4-Dichlorobenzene g/L0.50ND
Dichlorodifluoromethane (Freon 12)g/L0.50ND
1,1-Dichloroethane g/L0.50ND
1,2-Dichloroethane g/L0.50ND
1,1-Dichloroethylene g/L0.50ND
cis-1,2-Dichloroethylene g/L0.50ND
trans-1,2-Dichloroethylene g/L0.50ND
1,2-Dichloropropane g/L0.50ND
1,3-Dichloropropane g/L0.50ND
2,2-Dichloropropane g/L0.50 L-04ND
1,1-Dichloropropene g/L0.50ND
cis-1,3-Dichloropropene g/L0.50ND
trans-1,3-Dichloropropene g/L0.50ND
Diisopropyl Ether (DIPE)g/L0.50ND
Ethylbenzene g/L0.50ND
2-Hexanone (MBK)g/L5.0ND
Isopropylbenzene (Cumene)g/L0.50ND
p-Isopropyltoluene (p-Cymene)g/L0.50ND
Methyl tert-Butyl Ether (MTBE)g/L0.50ND
Methylene Chloride g/L5.0ND
4-Methyl-2-pentanone (MIBK)g/L5.0ND
Naphthalene g/L0.50ND
n-Propylbenzene g/L0.50ND
Styrene g/L0.50ND
1,1,2,2-Tetrachloroethane g/L0.50ND
Tetrachloroethylene g/L0.50ND
Toluene g/L0.50ND
1,2,3-Trichlorobenzene g/L1.0ND
1,2,4-Trichlorobenzene g/L0.50ND
[TOC_1]QC Data[TOC]
Page 9 of 18
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by GC/MS - Quality Control
QUALITY CONTROL
Batch B246742 - SW-846 5030B
Blank (B246742-BLK1) Prepared: 11/22/19 Analyzed: 11/23/19
1,1,1-Trichloroethane g/L0.50ND
1,1,2-Trichloroethane g/L0.50ND
Trichloroethylene g/L0.50ND
Trichlorofluoromethane (Freon 11)g/L0.50ND
1,2,3-Trichloropropane g/L0.50ND
1,2,4-Trimethylbenzene g/L0.50ND
1,3,5-Trimethylbenzene g/L0.50ND
Vinyl Acetate g/L20ND
Vinyl Chloride g/L0.50ND
m+p Xylene g/L1.0ND
o-Xylene g/L0.50ND
g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 93.423.3
g/L 25.0 70-130Surrogate: Toluene-d8 10025.0
g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10125.1
LCS (B246742-BS1) Prepared: 11/22/19 Analyzed: 11/23/19
Acetone g/L50 100 70-130102102
Benzene g/L0.50 10.0 70-13091.99.19
Bromobenzene g/L0.50 10.0 70-13098.79.87
Bromochloromethane g/L0.50 10.0 70-13096.29.62
Bromodichloromethane g/L0.50 10.0 70-13087.68.76
Bromoform g/L0.50 10.0 70-13092.09.20
Bromomethane g/L1.0 10.0 L-0760-14057.6 *5.76
2-Butanone (MEK)g/L5.0 100 70-13098.898.8
n-Butylbenzene g/L0.50 10.0 70-13088.68.86
sec-Butylbenzene g/L0.50 10.0 70-13092.99.29
tert-Butylbenzene g/L0.50 10.0 70-13094.59.45
Carbon Tetrachloride g/L0.50 10.0 70-13086.98.69
Chlorobenzene g/L0.50 10.0 70-13010310.3
Ethanol g/L50 100 L-0270-130137*137
Chlorodibromomethane g/L0.50 10.0 70-13096.09.60
Chloroethane g/L0.50 10.0 60-14091.39.13
Chloroform g/L0.50 10.0 70-13085.08.50
Chloromethane g/L0.60 10.0 60-14064.96.49
2-Chlorotoluene g/L0.50 10.0 70-13097.59.75
4-Chlorotoluene g/L0.50 10.0 70-13097.29.72
1,2-Dibromoethane (EDB)g/L0.50 10.0 70-13097.09.70
1,2-Dichlorobenzene g/L0.50 10.0 70-13096.39.63
1,3-Dichlorobenzene g/L0.50 10.0 70-13092.69.26
1,4-Dichlorobenzene g/L0.50 10.0 70-13094.19.41
Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 60-14071.77.17
1,1-Dichloroethane g/L0.50 10.0 70-13089.08.90
1,2-Dichloroethane g/L0.50 10.0 70-13096.59.65
1,1-Dichloroethylene g/L0.50 10.0 70-13098.69.86
cis-1,2-Dichloroethylene g/L0.50 10.0 70-13088.98.89
trans-1,2-Dichloroethylene g/L0.50 10.0 70-13093.79.37
1,2-Dichloropropane g/L0.50 10.0 70-13095.99.59
1,3-Dichloropropane g/L0.50 10.0 70-13095.29.52
2,2-Dichloropropane g/L0.50 10.0 L-0470-13060.6 *6.06
1,1-Dichloropropene g/L0.50 10.0 70-13089.28.92
cis-1,3-Dichloropropene g/L0.50 10.0 70-13085.48.54
trans-1,3-Dichloropropene g/L0.50 10.0 70-13079.57.95
Page 10 of 18
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39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by GC/MS - Quality Control
QUALITY CONTROL
Batch B246742 - SW-846 5030B
LCS (B246742-BS1) Prepared: 11/22/19 Analyzed: 11/23/19
Diisopropyl Ether (DIPE)g/L0.50 10.0 70-13092.69.26
Ethylbenzene g/L0.50 10.0 70-13097.79.77
2-Hexanone (MBK)g/L5.0 100 70-130110110
Isopropylbenzene (Cumene)g/L0.50 10.0 70-13010410.4
p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 70-13094.19.41
Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 70-13083.18.31
Methylene Chloride g/L5.0 10.0 70-13094.09.40
4-Methyl-2-pentanone (MIBK)g/L5.0 100 70-130113113
Naphthalene g/L0.50 10.0 70-13010910.9
n-Propylbenzene g/L0.50 10.0 70-13099.49.94
Styrene g/L0.50 10.0 70-13099.79.97
1,1,2,2-Tetrachloroethane g/L0.50 10.0 70-13011311.3
Tetrachloroethylene g/L0.50 10.0 70-13010310.3
Toluene g/L0.50 10.0 70-13092.29.22
1,2,3-Trichlorobenzene g/L1.0 10.0 70-13011111.1
1,2,4-Trichlorobenzene g/L0.50 10.0 70-13010510.5
1,1,1-Trichloroethane g/L0.50 10.0 70-13087.18.71
1,1,2-Trichloroethane g/L0.50 10.0 70-13097.59.75
Trichloroethylene g/L0.50 10.0 70-13091.49.14
Trichlorofluoromethane (Freon 11)g/L0.50 10.0 70-13090.69.06
1,2,3-Trichloropropane g/L0.50 10.0 70-13011011.0
1,2,4-Trimethylbenzene g/L0.50 10.0 70-13094.29.42
1,3,5-Trimethylbenzene g/L0.50 10.0 70-13010110.1
Vinyl Acetate g/L20 100 70-130100100
Vinyl Chloride g/L0.50 10.0 60-14086.28.62
m+p Xylene g/L1.0 20.0 70-13095.419.1
o-Xylene g/L0.50 10.0 70-13097.49.74
g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 91.322.8
g/L 25.0 70-130Surrogate: Toluene-d8 10225.4
g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10125.2
LCS Dup (B246742-BSD1) Prepared: 11/22/19 Analyzed: 11/23/19
Acetone g/L50 100 2570-130102 0.0392102
Benzene g/L0.50 10.0 2570-13091.7 0.2189.17
Bromobenzene g/L0.50 10.0 2570-13097.6 1.129.76
Bromochloromethane g/L0.50 10.0 2570-13099.0 2.879.90
Bromodichloromethane g/L0.50 10.0 2570-13090.2 2.929.02
Bromoform g/L0.50 10.0 2570-13093.9 2.049.39
Bromomethane g/L1.0 10.0 2560-14063.5 9.746.35
2-Butanone (MEK)g/L5.0 100 2570-130103 3.96103
n-Butylbenzene g/L0.50 10.0 2570-13090.1 1.689.01
sec-Butylbenzene g/L0.50 10.0 2570-13095.3 2.559.53
tert-Butylbenzene g/L0.50 10.0 2570-13096.4 1.999.64
Carbon Tetrachloride g/L0.50 10.0 2570-13088.5 1.828.85
Chlorobenzene g/L0.50 10.0 2570-130102 0.29210.2
Ethanol g/L50 100 25 L-0270-130150 8.72*150
Chlorodibromomethane g/L0.50 10.0 2570-130100 4.5810.0
Chloroethane g/L0.50 10.0 2560-14095.8 4.819.58
Chloroform g/L0.50 10.0 2570-13087.5 2.908.75
Chloromethane g/L0.60 10.0 2560-14063.6 2.026.36
2-Chlorotoluene g/L0.50 10.0 2570-13099.2 1.739.92
4-Chlorotoluene g/L0.50 10.0 2570-13097.1 0.1039.71
Page 11 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by GC/MS - Quality Control
QUALITY CONTROL
Batch B246742 - SW-846 5030B
LCS Dup (B246742-BSD1) Prepared: 11/22/19 Analyzed: 11/23/19
1,2-Dibromoethane (EDB)g/L0.50 10.0 2570-13099.6 2.649.96
1,2-Dichlorobenzene g/L0.50 10.0 2570-13096.9 0.6219.69
1,3-Dichlorobenzene g/L0.50 10.0 2570-13094.8 2.359.48
1,4-Dichlorobenzene g/L0.50 10.0 2570-13097.2 3.249.72
Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 2560-14070.2 2.117.02
1,1-Dichloroethane g/L0.50 10.0 2570-13092.5 3.869.25
1,2-Dichloroethane g/L0.50 10.0 2570-13099.9 3.469.99
1,1-Dichloroethylene g/L0.50 10.0 2570-13099.3 0.7079.93
cis-1,2-Dichloroethylene g/L0.50 10.0 2570-13090.8 2.119.08
trans-1,2-Dichloroethylene g/L0.50 10.0 2570-13096.1 2.539.61
1,2-Dichloropropane g/L0.50 10.0 2570-13099.8 3.999.98
1,3-Dichloropropane g/L0.50 10.0 2570-13099.5 4.429.95
2,2-Dichloropropane g/L0.50 10.0 25 L-0470-13061.5 1.47*6.15
1,1-Dichloropropene g/L0.50 10.0 2570-13088.9 0.3378.89
cis-1,3-Dichloropropene g/L0.50 10.0 2570-13088.0 3.008.80
trans-1,3-Dichloropropene g/L0.50 10.0 2570-13082.2 3.348.22
Diisopropyl Ether (DIPE)g/L0.50 10.0 2570-13096.2 3.819.62
Ethylbenzene g/L0.50 10.0 2570-13096.6 1.139.66
2-Hexanone (MBK)g/L5.0 100 2570-130115 4.39115
Isopropylbenzene (Cumene)g/L0.50 10.0 2570-130104 0.76810.4
p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 2570-13095.8 1.799.58
Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 2570-13084.0 1.088.40
Methylene Chloride g/L5.0 10.0 2570-13096.1 2.219.61
4-Methyl-2-pentanone (MIBK)g/L5.0 100 2570-130116 3.00116
Naphthalene g/L0.50 10.0 2570-130114 4.4111.4
n-Propylbenzene g/L0.50 10.0 2570-130100 0.80210.0
Styrene g/L0.50 10.0 2570-13098.7 1.019.87
1,1,2,2-Tetrachloroethane g/L0.50 10.0 2570-130115 1.6611.5
Tetrachloroethylene g/L0.50 10.0 2570-130106 2.9610.6
Toluene g/L0.50 10.0 2570-13094.0 1.939.40
1,2,3-Trichlorobenzene g/L1.0 10.0 2570-130116 4.8511.6
1,2,4-Trichlorobenzene g/L0.50 10.0 2570-130108 2.3510.8
1,1,1-Trichloroethane g/L0.50 10.0 2570-13089.0 2.168.90
1,1,2-Trichloroethane g/L0.50 10.0 2570-130101 3.7210.1
Trichloroethylene g/L0.50 10.0 2570-13090.2 1.329.02
Trichlorofluoromethane (Freon 11)g/L0.50 10.0 2570-13093.8 3.479.38
1,2,3-Trichloropropane g/L0.50 10.0 2570-130108 1.3810.8
1,2,4-Trimethylbenzene g/L0.50 10.0 2570-13094.8 0.6359.48
1,3,5-Trimethylbenzene g/L0.50 10.0 2570-130102 1.1810.2
Vinyl Acetate g/L20 100 2570-130111 10.2111
Vinyl Chloride g/L0.50 10.0 2560-14088.2 2.298.82
m+p Xylene g/L1.0 20.0 2570-13097.2 1.9219.4
o-Xylene g/L0.50 10.0 2570-13097.9 0.5129.79
g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 92.423.1
g/L 25.0 70-130Surrogate: Toluene-d8 10325.7
g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10025.0
Page 12 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
*QC result is outside of established limits.
Wide recovery limits established for difficult compound.
Wide RPD limits established for difficult compound.
#Data exceeded client recommended or regulatory level
Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the
calculation which have not been rounded.
No results have been blank subtracted unless specified in the case narrative section.
FLAG/QUALIFIER SUMMARY
Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated
concentration (CLP J-Flag).
J
Laboratory fortified blank/laboratory control sample recovery and duplicate recoveries outside of control limits.
Data validation is not affected since all results are "not detected" for associated samples in this batch and bias is
on the high side.
L-02
Laboratory fortified blank/laboratory control sample recovery and duplicate recovery are outside of control limits.
Reported value for this compound is likely to be biased on the low side.
L-04
Either laboratory fortified blank/laboratory control sample or duplicate recovery is outside of control limits, but
the other is within limits. RPD between the two LFB/LCS results is within method specified criteria.
L-07
Elevated reporting limit due to high concentration of target compounds.RL-11
[TOC_1]Flag/Qualifier Summary[TOC]
Page 13 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
SM21-22 6200B in Water
NCAcetone
NCBenzene
NCBromobenzene
NCBromochloromethane
NCBromodichloromethane
NCBromoform
NCBromomethane
NC2-Butanone (MEK)
NCn-Butylbenzene
NCsec-Butylbenzene
NCtert-Butylbenzene
NCCarbon Tetrachloride
NCChlorobenzene
NCEthanol
NCChlorodibromomethane
NCChloroethane
NCChloroform
NCChloromethane
NC2-Chlorotoluene
NC4-Chlorotoluene
NC1,2-Dibromoethane (EDB)
NC1,2-Dichlorobenzene
NC1,3-Dichlorobenzene
NC1,4-Dichlorobenzene
NCDichlorodifluoromethane (Freon 12)
NC1,1-Dichloroethane
NC1,2-Dichloroethane
NC1,1-Dichloroethylene
NCcis-1,2-Dichloroethylene
NCtrans-1,2-Dichloroethylene
NC1,2-Dichloropropane
NC1,3-Dichloropropane
NC2,2-Dichloropropane
NC1,1-Dichloropropene
NCcis-1,3-Dichloropropene
NCtrans-1,3-Dichloropropene
NCDiisopropyl Ether (DIPE)
NCEthylbenzene
NC2-Hexanone (MBK)
NCIsopropylbenzene (Cumene)
NCp-Isopropyltoluene (p-Cymene)
NCMethyl tert-Butyl Ether (MTBE)
NCMethylene Chloride
NC4-Methyl-2-pentanone (MIBK)
NCNaphthalene
NCn-Propylbenzene
NCStyrene
[TOC_1]Certifications[TOC]
Page 14 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
SM21-22 6200B in Water
NC1,1,2,2-Tetrachloroethane
NCTetrachloroethylene
NCToluene
NC1,2,3-Trichlorobenzene
NC1,2,4-Trichlorobenzene
NC1,1,1-Trichloroethane
NC1,1,2-Trichloroethane
NCTrichloroethylene
NCTrichlorofluoromethane (Freon 11)
NC1,2,3-Trichloropropane
NC1,2,4-Trimethylbenzene
NC1,3,5-Trimethylbenzene
NCVinyl Acetate
NCVinyl Chloride
NCm+p Xylene
NCo-Xylene
The CON-TEST Environmental Laboratory operates under the following certifications and accreditations:
Code Description Number Expires
100033AIHA-LAP, LLC - ISO17025:2017AIHA 03/1/2020
M-MA100Massachusetts DEPMA 06/30/2020
PH-0567Connecticut Department of Publilc HealthCT 09/30/2021
10899 NELAPNew York State Department of HealthNY 04/1/2020
2516 NELAPNew Hampshire Environmental LabNH-S 02/5/2020
LAO00112Rhode Island Department of HealthRI 12/30/2019
652North Carolina Div. of Water QualityNC 12/31/2019
MA007 NELAPNew Jersey DEPNJ 06/30/2020
E871027 NELAPFlorida Department of HealthFL 06/30/2020
LL015036Vermont Department of Health Lead LaboratoryVT 07/30/2020
2011028State of MaineME 06/9/2021
460217Commonwealth of VirginiaVA 12/14/2019
2557 NELAPNew Hampshire Environmental LabNH-P 09/6/2020
VT-255716Vermont Department of Health Drinking WaterVT-DW 06/12/2020
25703North Carolina Department of HealthNC-DW 07/31/2020
68-05812Commonwealth of Pennsylvania DEPPA 06/30/2020
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