WS-3630_11513_CA_MRP_20200107_LTRRPT

1

January 7, 2020

Mr. Hassan Osman
NCDEQ, Division of Waste Management, UST Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Reference: Letter Report
Former Myer’s Exxon
2663 US Highway 158
Mocksville, Davidson County, North Carolina
NCDEQ Incident No. 11513
NCDEQ Contract: N17006
ECS Project 49:1673-F

Dear Mr. Osman:

As authorized by your acceptance of ECS Southeast, LLP (ECS) Task Authorization Request
(TAR) No. 5 dated October 9, 2019, ECS has completed the Letter 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.

PROJECT UNDERSTANDING

The subject property is located at 2663 US Highway 158 in Mocksville, Davie County, North
Carolina (Figures 1 and 2). The site is an active automobile repair facility called Farmington
Mufflers. Based on information provided to ECS, two 6,000-gallon gasoline underground
storage tanks (USTs) and one 1,000-gallon gasoline UST were reportedly installed in 1959 and
removed in 1993. Free phase product was observed on the water in the UST excavation during
removal activities. Soil samples collected in 1993 near the location of the 1,000-gallon UST
confirmed the presence of soil contamination exceeding regulatory standards. Additional soil
assessments ensued in 1993 and 1994 when monitoring well MW-1 was installed in the vicinity
of the former UST locations. A groundwater sample collected from monitoring well MW-1 was
found to be impacted with petroleum contaminants at concentrations greater than their
respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS).

Several monitoring events were conducted between December 2010 and October 2017 due to
the continued presence of compound concentrations in the groundwater samples collected
greater than their respective NC2LGWQS, including benzene detected at concentrations
greater than its Gross Contamination Level (GCL). A receptor survey was completed in 2012,
which concluded that no active water supply wells were identified with 1,500 feet of the release
as all surrounding properties utilized drinking water from municipal sources. ECS conducted an
8-hour aggressive fluid vapor recovery (AFVR) event on October 22, 2018 utilizing monitoring
well MW-1 as an extraction point.

On February 7, 2019, ECS provided oversight for the installation of monitoring wells MW-2 and
MW-3. Groundwater samples were collected from monitoring wells MW-1, MW-2, and MW-3
on February 8, 2019. Several compounds were detected in the sample collected from
Letter Report
Former Myers Exxon
Mocksville, Davidson County, North Carolina
NCDEQ Incident: TF-11513
ECS Project 49:1673-F
January 7, 2020

2

monitoring well MW-1 at concentrations greater than their respective NC2LGWQS, including
benzene at a concentration greater than its GCL. No compounds were identified in the samples
collected from monitoring wells MW-2 and MW-3 at concentrations greater than the laboratory
method reporting limits.

On August 7, 2019, ECS contracted with Zebra to conduct an AFVR event utilizing monitoring
well MW-1 as an extraction point. A total of approximately 405 gallons of liquid was removed
from the monitoring well. An estimated total of 0.0001 pounds (0.00002 gallons) of volatile
organic compounds were emitted as vapor during the AFVR event.

FIELD ACTIVITIES

On November 12, 2019, ECS returned to the site in order to gauge the depth to the water
surface in, and collect a groundwater sample from, monitoring well MW-1. Monitoring well
construction detail and liquid level data are provided in Table 1. Prior to sampling, the
monitoring well was purged using a new, dedicated bailer by removing at least three well
volumes of water from the well. The groundwater sample was collected by pouring the sample
directly into laboratory prepared containers from the bailer. The sample containers were
labeled with ECS’ project number, sample identification, sample date and time, and requested
analytical analysis. The containers were then packaged and placed into a cooler with ice to
maintain the samples at approximately four degrees Celsius. The groundwater sample was
submitted to Con-Test Analytical Laboratory (Con-Test), a North Carolina registered laboratory,
located in East Longmeadow, Massachusetts for analysis. The sample was submitted for
chemical analysis of volatile organic compounds using Standard Method 6200B. ECS
maintained Chain-of-Custody (COC) procedures throughout the sample collection and
transportation process. A copy of the Con-Test COC is attached.

Review of the laboratory analytical results indicated concentrations of several compounds in the
sample collected from monitoring well MW-1 at concentrations greater than their respective
NC2LGWQS, including benzene at a concentration greater than its GCL. The laboratory
analytical results are summarized in Table 2. A copy of the laboratory analytical report is
attached.

CONCLUSIONS AND RECOMMENDATIONS

ECS concludes that overall compound concentrations increased in the sample collected from
monitoring well MW-1 in November 2019, as compared to the sample collected in February
2019. While the benzene concentration identified in the sample collected from monitoring well
MW-1 was greater than its GCL, it has decreased by approximately 64 percent since 2012,
when the highest concentration of benzene at the site was detected.

Based on the results of this assessment, ECS recommends installing a remedial device in
monitoring well MW-1 in order to lower the benzene concentrations at the site to below its
GCLs. As the site meets the criteria for an Intermediate risk site, once the benzene
concentrations have been reduced to below its GCL, the site can be granted a status of No
Further Action with a Notice of Residual Petroleum. ECS recommends that a copy of this Letter
Report be provided to the property owner.

FIGURES
SOURCE:
USGS TOPOGRAPHIC MAP
MOCKSVILLE, NC QUADRANGLE
DATED 1969 REVISED 1994
FIGURE 1TOPOGRAPHIC MAP
FORMER MYER’S EXXON2663 US HIGHWAY 158MOCKSVILLE, DAVIE COUNTY, NCNCDEQ INCIDENT No. 11513ECS PROJECT No. 49:1673-F
SITE
SCALE (IN FEET)1,000 0 2,0002,000
SOURCE:
ECS FIELD NOTES
1994 SITE INVESTIGATION REPORT
FIGURE 2MONITORING WELL LOCATION MAP
FORMER MYER’S EXXON2663 US HIGHWAY 158MOCKSVILLE, DAVIE COUNTY, NCNCDEQ INCIDENT No. 11513ECS PROJECT No. 49:1673-FCAROLINAS
SCALE (IN FEET)
60 30 0 60
SITE
BUILDING
Grass
APPROXIMATE SITE BOUNDARY
MONITORING WELL
APPROXIMATE UST BASIN
MW-2
MW-3
MW-1
APPROXIMATE LOCATION OF FORMER USTs(2 x 6,000-gallon Gasoline USTs)(1 x 1,000-gallon Gasoline UST)

TABLES
Table 1
Monitoring Well Information and Groundwater Elevation Data
Former Myer's Exxon
2663 US Highway 158
Mocksville, Davie County, North Carolina
NCDEQ Incident: 11513
ECS Project: 49:1673-F
Well ID Screened
Interval (ft bgs)
Well
Depth (ft
bgs)
Top of Casing
Elevation (ft)Date Measured Depth to Water (ft BTOC)
Groundwater
Elevation (ft)
11/17/03 12.40 87.60
03/24/09 11.37 88.63
01/20/15 10.07 89.93
05/24/16 9.65 90.35
07/06/18 10.32 91.82
01/08/19 7.51 94.63
08/07/19 11.54 90.60
11/12/19 13.65 88.49
MW-2 10.0 - 25.0 25.0 100.07 11/17/03 10.29 89.78
MW-3 9.0 - 19.0 19.0 99.53 03/24/09 9.42 90.11
Notes:
Elevation relative to arbitrary benchmark of 100' at site
ft bgs = feet below ground surface
102.1425.010.0 - 25.0MW-1
Table 2
Summary of Groundwater Analytical Results
Former Myer's Exxon
2663 US Highway 158Mocksville, Davie County, North Carolina
NCDEQ Incident: 11513
ECS Project: 49:1673-F
Volatile Organic Compounds by Standard Method 6200B or equivalent
Benzenen-Butylbenzene1,2-Dibromoethane1,2-DichloroethaneEthylbenzeneIsopropylbenzeneIsopropyl EtherMethyl tert butyl etherNaphthalenen-PropylbenzeneToluene1,1,1-Trichloroethane1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneTotal XylenesNC2LGWQS 1 70 0.02 0.4 600 70 70 20 6 70 600 200 400 400 500
GCL 5,000 6,900 50 400 84,500 25,000 70,000 20,000 6,000 30,000 260,000 200,000 28,500 25,000 85,500
02/08/94 2,044 ------<0.07 402 <0.1 1,230 75 <1 <0.09 2,943 28 <0.14 <51 2,27902/28/94 4,700 ND ND ND 1,020 ND ND ND ND ND 9,470 ND ND ND 4,54012/02/10 13,000 ND 130 110 3,000 140 210 100 1,300 370 24,000 ND 2,500 650 16,000
04/10/12 14,000 55 <0.5 120 3,500 140 260 85 490 360 27,000 <0.50 2,600 660 19,000
03/12/13 11,400 <50 <50 69.3 2,810 105 203 55.3 472 287 20,100 <50 1,950 535 14,58003/21/16 8,810 <0.5 <0.5 55.9 3,240 178 122 <0.5 656 520 16,300 <0.5 3,250 884 16,01010/11/17 7,500 <0.5 <0.5 90 2,800 140 390 260 690 340 14,000 <0.5 4,000 1,100 20,00002/08/19 5,320 <50 <50 61.9 1,920 85.2 288 167 462 219 10,600 <50 2,240 585 11,93011/12/19 5,100 <200 <200 <400 3,100 150 J 100 J <200 1,900 J 380 13,000 <200 2,700 800 16,900MW-2 02/08/19 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <2.0 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5
MW-3 02/08/19 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <2.0 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5
Notes:
Only compounds detected are shown
Results presented in micrograms per liter (µg/L)
NC2LGWQS = North Carolina 2L Groundwater Quality Standard
GCL = Gross Contaminant Level
--- = Not previoulsy reported
ND = Not Detected
J = Estimated concentration between laboratory method reporting limit and detection limit
VALUE = concentration exceeds laboraotry method reporting limit
VALUE = concentration exceeds the NC2LGWQS
VALUE = concentration exceeds the GCL
Sample DateSample ID
MW-1

APPENDIX A
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
November 25, 2019
Scott Young
ECS Southeast - Greensboro, NC
4811 Koger Boulevard
Greensboro, NC 27407
Project Location: Thomasville, NC
Client Job Number:
Project Number: 1673-F
Laboratory Work Order Number: 19K0885
Enclosed are results of analyses for samples received by the laboratory on November 14, 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
19K0885-01 6
Sample Preparation Information 8
QC Data 9
Volatile Organic Compounds by GC/MS 9
B246537 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
11/25/2019
ECS Southeast - Greensboro, NC
4811 Koger Boulevard
Greensboro, NC 27407
ATTN: Scott Young
1673-F
19K0885
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
Thomasville, NC
MW-1 19K0885-01 Ground Water SM21-22 6200B
[TOC_1]Sample Summary[TOC]
Page 3 of 18
Table of Contents
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
19K0885-01MW-1
DL
1,2,4-Trimethylbenzene 2700 200 g/L SM21-22 6200B72
1,3,5-Trimethylbenzene 800 200 g/L SM21-22 6200B56
Benzene 5100 200 g/L SM21-22 6200B72
Diisopropyl Ether (DIPE)100 200 g/L SM21-22 6200BJ68
Ethylbenzene 3100 200 g/L SM21-22 6200B52
Isopropylbenzene (Cumene)150 200 g/L SM21-22 6200BJ68
m+p Xylene 12000 400 g/L SM21-22 6200B120
Naphthalene 1900 2000 g/L SM21-22 6200BJ120
n-Propylbenzene 380 200 g/L SM21-22 6200B52
o-Xylene 4900 200 g/L SM21-22 6200B68
Toluene 13000 200 g/L SM21-22 6200B56
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
Table of Contents
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 limit for sample 19K0885-01 due to high concentrations 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
Vinyl Chloride
B246537-BS1, B246537-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
19K0885-01[MW-1], B246537-BLK1, B246537-BS1, B246537-BSD1
Dichlorodifluoromethane (Freon 12)
19K0885-01[MW-1], B246537-BLK1, B246537-BS1, B246537-BSD1
Vinyl Acetate
19K0885-01[MW-1], B246537-BLK1, B246537-BS1, B246537-BSD1
Elevated reporting limit due to high concentration of target compounds.
Analyte & Samples(s) Qualified:
RL-11
19K0885-01[MW-1]
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.
Kerry K. McGee
Project Manager
Page 5 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Date Received: 11/14/2019
Work Order: 19K0885Sample Description:Project Location: Thomasville, NC
Sample ID: 19K0885-01
Field Sample #: MW-1
Sample Matrix: Ground Water
Sampled: 11/12/2019 15:00
[TOC_2]19K0885-01[TOC]
AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
DL Units
Date
PreparedMethod
Sample Flags: RL-11 Volatile Organic Compounds by GC/MS
ND 20000 11/23/19 11:22 EEHg/L1500 11/20/19SM21-22 6200B400Acetone
5100 200 11/23/19 11:22 EEHg/L72 11/20/19SM21-22 6200B400Benzene
ND 200 11/23/19 11:22 EEHg/L60 11/20/19SM21-22 6200B400Bromobenzene
ND 200 11/23/19 11:22 EEHg/L130 11/20/19SM21-22 6200B400Bromochloromethane
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B400Bromodichloromethane
ND 200 11/23/19 11:22 EEHg/L180 11/20/19SM21-22 6200B400Bromoform
ND 400 11/23/19 11:22 EEHg/L310 11/20/19SM21-22 6200B400Bromomethane
ND 2000 11/23/19 11:22 EEHg/L780 11/20/19SM21-22 6200B4002-Butanone (MEK)
ND 200 11/23/19 11:22 EEHg/L84 11/20/19SM21-22 6200B400n-Butylbenzene
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B400sec-Butylbenzene
ND 200 11/23/19 11:22 EEHg/L68 11/20/19SM21-22 6200B400tert-Butylbenzene
ND 200 11/23/19 11:22 EEHg/L44 11/20/19SM21-22 6200B400Carbon Tetrachloride
ND 200 11/23/19 11:22 EEHg/L60 11/20/19SM21-22 6200B400Chlorobenzene
ND 20000 11/23/19 11:22 EEHg/L4200 11/20/19SM21-22 6200B400Ethanol
ND 200 11/23/19 11:22 EEHg/L84 11/20/19SM21-22 6200B400Chlorodibromomethane
ND 200 11/23/19 11:22 EEHg/L140 11/20/19SM21-22 6200B400Chloroethane
ND 200 11/23/19 11:22 EEHg/L68 11/20/19SM21-22 6200B400Chloroform
ND 800 11/23/19 11:22 EEHg/L180 11/20/19SM21-22 6200B400Chloromethane
ND 200 11/23/19 11:22 EEHg/L48 11/20/19SM21-22 6200B4002-Chlorotoluene
ND 200 11/23/19 11:22 EEHg/L56 11/20/19SM21-22 6200B4004-Chlorotoluene
ND 200 11/23/19 11:22 EEHg/L76 11/20/19SM21-22 6200B4001,2-Dibromoethane (EDB)
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B4001,2-Dichlorobenzene
ND 200 11/23/19 11:22 EEHg/L48 11/20/19SM21-22 6200B4001,3-Dichlorobenzene
ND 200 11/23/19 11:22 EEHg/L52 11/20/19SM21-22 6200B4001,4-Dichlorobenzene
ND 200 11/23/19 11:22 EEHg/L100 11/20/19SM21-22 6200B400L-04Dichlorodifluoromethane (Freon 12)
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B4001,1-Dichloroethane
ND 400 11/23/19 11:22 EEHg/L160 11/20/19SM21-22 6200B4001,2-Dichloroethane
ND 200 11/23/19 11:22 EEHg/L130 11/20/19SM21-22 6200B4001,1-Dichloroethylene
ND 200 11/23/19 11:22 EEHg/L52 11/20/19SM21-22 6200B400cis-1,2-Dichloroethylene
ND 200 11/23/19 11:22 EEHg/L120 11/20/19SM21-22 6200B400trans-1,2-Dichloroethylene
ND 200 11/23/19 11:22 EEHg/L80 11/20/19SM21-22 6200B4001,2-Dichloropropane
ND 200 11/23/19 11:22 EEHg/L44 11/20/19SM21-22 6200B4001,3-Dichloropropane
ND 200 11/23/19 11:22 EEHg/L80 11/20/19SM21-22 6200B400L-042,2-Dichloropropane
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B4001,1-Dichloropropene
ND 200 11/23/19 11:22 EEHg/L52 11/20/19SM21-22 6200B400cis-1,3-Dichloropropene
ND 200 11/23/19 11:22 EEHg/L92 11/20/19SM21-22 6200B400trans-1,3-Dichloropropene
100 200 11/23/19 11:22 EEHg/L68 11/20/19SM21-22 6200B400JDiisopropyl Ether (DIPE)
3100 200 11/23/19 11:22 EEHg/L52 11/20/19SM21-22 6200B400Ethylbenzene
ND 2000 11/23/19 11:22 EEHg/L610 11/20/19SM21-22 6200B4002-Hexanone (MBK)
150 200 11/23/19 11:22 EEHg/L68 11/20/19SM21-22 6200B400JIsopropylbenzene (Cumene)
ND 200 11/23/19 11:22 EEHg/L80 11/20/19SM21-22 6200B400p-Isopropyltoluene (p-Cymene)
ND 200 11/23/19 11:22 EEHg/L100 11/20/19SM21-22 6200B400Methyl tert-Butyl Ether (MTBE)
ND 2000 11/23/19 11:22 EEHg/L140 11/20/19SM21-22 6200B400Methylene Chloride
ND 2000 11/23/19 11:22 EEHg/L670 11/20/19SM21-22 6200B4004-Methyl-2-pentanone (MIBK)
[TOC_1]Sample Results[TOC]
Page 6 of 18
Table of Contents
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Date Received: 11/14/2019
Work Order: 19K0885Sample Description:Project Location: Thomasville, NC
Sample ID: 19K0885-01
Field Sample #: MW-1
Sample Matrix: Ground Water
Sampled: 11/12/2019 15:00
AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
DL Units
Date
PreparedMethod
Sample Flags: RL-11 Volatile Organic Compounds by GC/MS
1900 2000 11/23/19 11:22 EEHg/L120 11/20/19SM21-22 6200B400JNaphthalene
380 200 11/23/19 11:22 EEHg/L52 11/20/19SM21-22 6200B400n-Propylbenzene
ND 200 11/23/19 11:22 EEHg/L44 11/20/19SM21-22 6200B400Styrene
ND 200 11/23/19 11:22 EEHg/L88 11/20/19SM21-22 6200B4001,1,2,2-Tetrachloroethane
ND 200 11/23/19 11:22 EEHg/L72 11/20/19SM21-22 6200B400Tetrachloroethylene
13000 200 11/23/19 11:22 EEHg/L56 11/20/19SM21-22 6200B400Toluene
ND 800 11/23/19 11:22 EEHg/L230 11/20/19SM21-22 6200B4001,2,3-Trichlorobenzene
ND 200 11/23/19 11:22 EEHg/L160 11/20/19SM21-22 6200B4001,2,4-Trichlorobenzene
ND 200 11/23/19 11:22 EEHg/L80 11/20/19SM21-22 6200B4001,1,1-Trichloroethane
ND 200 11/23/19 11:22 EEHg/L64 11/20/19SM21-22 6200B4001,1,2-Trichloroethane
ND 200 11/23/19 11:22 EEHg/L96 11/20/19SM21-22 6200B400Trichloroethylene
ND 200 11/23/19 11:22 EEHg/L130 11/20/19SM21-22 6200B400Trichlorofluoromethane (Freon 11)
ND 200 11/23/19 11:22 EEHg/L100 11/20/19SM21-22 6200B4001,2,3-Trichloropropane
2700 200 11/23/19 11:22 EEHg/L72 11/20/19SM21-22 6200B4001,2,4-Trimethylbenzene
800 200 11/23/19 11:22 EEHg/L56 11/20/19SM21-22 6200B4001,3,5-Trimethylbenzene
ND 8000 11/23/19 11:22 EEHg/L4100 11/20/19SM21-22 6200B400L-04Vinyl Acetate
ND 200 11/23/19 11:22 EEHg/L180 11/20/19SM21-22 6200B400Vinyl Chloride
12000 400 11/23/19 11:22 EEHg/L120 11/20/19SM21-22 6200B400m+p Xylene
4900 200 11/23/19 11:22 EEHg/L68 11/20/19SM21-22 6200B400o-Xylene
Surrogates % Recovery Recovery Limits Flag/Qual
1,2-Dichloroethane-d4 96.6 11/23/19 11:2270-130
Toluene-d8 99.5 11/23/19 11:2270-130
4-Bromofluorobenzene 102 11/23/19 11:2270-130
Page 7 of 18
Table of Contents
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]
B246537 11/20/190.0125 5.0019K0885-01 [MW-1]
[TOC_1]Sample Preparation Information[TOC]
Page 8 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
[TOC_2]Volatile Organic Compounds by GC/MS[TOC]
Batch B246537 - SW-846 5030B
[TOC_3]B246537[TOC]
Blank (B246537-BLK1) Prepared: 11/20/19 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/L0.50 L-04ND
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
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 B246537 - SW-846 5030B
Blank (B246537-BLK1) Prepared: 11/20/19 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/L20 L-04ND
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 96.124.0
g/L 25.0 70-130Surrogate: Toluene-d8 98.324.6
g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 98.224.6
LCS (B246537-BS1) Prepared: 11/20/19 Analyzed: 11/22/19
Acetone g/L50 100 70-130109109
Benzene g/L0.50 10.0 70-13080.88.08
Bromobenzene g/L0.50 10.0 70-13093.29.32
Bromochloromethane g/L0.50 10.0 70-13079.37.93
Bromodichloromethane g/L0.50 10.0 70-13094.99.49
Bromoform g/L0.50 10.0 70-13094.99.49
Bromomethane g/L1.0 10.0 60-14088.28.82
2-Butanone (MEK)g/L5.0 100 70-13080.380.3
n-Butylbenzene g/L0.50 10.0 70-13010210.2
sec-Butylbenzene g/L0.50 10.0 70-13010310.3
tert-Butylbenzene g/L0.50 10.0 70-13010510.5
Carbon Tetrachloride g/L0.50 10.0 70-13095.59.55
Chlorobenzene g/L0.50 10.0 70-13097.69.76
Ethanol g/L50 100 70-130117117
Chlorodibromomethane g/L0.50 10.0 70-13093.39.33
Chloroethane g/L0.50 10.0 60-14082.68.26
Chloroform g/L0.50 10.0 70-13085.48.54
Chloromethane g/L0.60 10.0 60-14067.06.70
2-Chlorotoluene g/L0.50 10.0 70-13093.79.37
4-Chlorotoluene g/L0.50 10.0 70-13010010.0
1,2-Dibromoethane (EDB)g/L0.50 10.0 70-13093.19.31
1,2-Dichlorobenzene g/L0.50 10.0 70-13096.79.67
1,3-Dichlorobenzene g/L0.50 10.0 70-13098.49.84
1,4-Dichlorobenzene g/L0.50 10.0 70-13095.09.50
Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 L-0460-14059.0 *5.90
1,1-Dichloroethane g/L0.50 10.0 70-13082.78.27
1,2-Dichloroethane g/L0.50 10.0 70-13098.09.80
1,1-Dichloroethylene g/L0.50 10.0 70-13098.59.85
cis-1,2-Dichloroethylene g/L0.50 10.0 70-13087.58.75
trans-1,2-Dichloroethylene g/L0.50 10.0 70-13086.08.60
1,2-Dichloropropane g/L0.50 10.0 70-13085.38.53
1,3-Dichloropropane g/L0.50 10.0 70-13091.89.18
2,2-Dichloropropane g/L0.50 10.0 L-0470-13052.3 *5.23
1,1-Dichloropropene g/L0.50 10.0 70-13088.18.81
cis-1,3-Dichloropropene g/L0.50 10.0 70-13085.38.53
trans-1,3-Dichloropropene g/L0.50 10.0 70-13083.08.30
Page 10 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 B246537 - SW-846 5030B
LCS (B246537-BS1) Prepared: 11/20/19 Analyzed: 11/22/19
Diisopropyl Ether (DIPE)g/L0.50 10.0 70-13080.58.05
Ethylbenzene g/L0.50 10.0 70-13010110.1
2-Hexanone (MBK)g/L5.0 100 70-13097.297.2
Isopropylbenzene (Cumene)g/L0.50 10.0 70-13010510.5
p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 70-13096.09.60
Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 70-13079.97.99
Methylene Chloride g/L5.0 10.0 70-13087.88.78
4-Methyl-2-pentanone (MIBK)g/L5.0 100 70-13099.199.1
Naphthalene g/L0.50 10.0 70-13097.69.76
n-Propylbenzene g/L0.50 10.0 70-13010210.2
Styrene g/L0.50 10.0 70-13089.98.99
1,1,2,2-Tetrachloroethane g/L0.50 10.0 70-13010210.2
Tetrachloroethylene g/L0.50 10.0 70-13097.19.71
Toluene g/L0.50 10.0 70-13092.29.22
1,2,3-Trichlorobenzene g/L1.0 10.0 70-13078.67.86
1,2,4-Trichlorobenzene g/L0.50 10.0 70-13089.68.96
1,1,1-Trichloroethane g/L0.50 10.0 70-13095.69.56
1,1,2-Trichloroethane g/L0.50 10.0 70-13091.39.13
Trichloroethylene g/L0.50 10.0 70-13094.69.46
Trichlorofluoromethane (Freon 11)g/L0.50 10.0 70-13010310.3
1,2,3-Trichloropropane g/L0.50 10.0 70-13010310.3
1,2,4-Trimethylbenzene g/L0.50 10.0 70-13096.79.67
1,3,5-Trimethylbenzene g/L0.50 10.0 70-13010210.2
Vinyl Acetate g/L20 100 L-0470-13068.6 *68.6
Vinyl Chloride g/L0.50 10.0 L-0260-140168*16.8
m+p Xylene g/L1.0 20.0 70-13010220.4
o-Xylene g/L0.50 10.0 70-13010310.3
g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 98.724.7
g/L 25.0 70-130Surrogate: Toluene-d8 99.124.8
g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10225.4
LCS Dup (B246537-BSD1) Prepared: 11/20/19 Analyzed: 11/23/19
Acetone g/L50 100 2570-130107 1.60107
Benzene g/L0.50 10.0 2570-13081.0 0.2478.10
Bromobenzene g/L0.50 10.0 2570-13091.2 2.179.12
Bromochloromethane g/L0.50 10.0 2570-13079.7 0.5037.97
Bromodichloromethane g/L0.50 10.0 2570-13091.0 4.209.10
Bromoform g/L0.50 10.0 2570-13092.2 2.899.22
Bromomethane g/L1.0 10.0 2560-14091.2 3.349.12
2-Butanone (MEK)g/L5.0 100 2570-13081.0 0.81881.0
n-Butylbenzene g/L0.50 10.0 2570-130107 4.7910.7
sec-Butylbenzene g/L0.50 10.0 2570-130112 7.7311.2
tert-Butylbenzene g/L0.50 10.0 2570-130110 4.6611.0
Carbon Tetrachloride g/L0.50 10.0 2570-13095.8 0.3149.58
Chlorobenzene g/L0.50 10.0 2570-13097.3 0.3089.73
Ethanol g/L50 100 2570-130119 2.25119
Chlorodibromomethane g/L0.50 10.0 2570-13092.0 1.409.20
Chloroethane g/L0.50 10.0 2560-14079.7 3.577.97
Chloroform g/L0.50 10.0 2570-13086.1 0.8168.61
Chloromethane g/L0.60 10.0 2560-14065.1 2.886.51
2-Chlorotoluene g/L0.50 10.0 2570-13094.6 0.9569.46
4-Chlorotoluene g/L0.50 10.0 2570-130101 0.49810.1
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 B246537 - SW-846 5030B
LCS Dup (B246537-BSD1) Prepared: 11/20/19 Analyzed: 11/23/19
1,2-Dibromoethane (EDB)g/L0.50 10.0 2570-13092.6 0.5399.26
1,2-Dichlorobenzene g/L0.50 10.0 2570-130100 3.6510.0
1,3-Dichlorobenzene g/L0.50 10.0 2570-130103 4.2810.3
1,4-Dichlorobenzene g/L0.50 10.0 2570-13099.1 4.229.91
Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 25 L-0460-14053.4 9.96*5.34
1,1-Dichloroethane g/L0.50 10.0 2570-13083.0 0.3628.30
1,2-Dichloroethane g/L0.50 10.0 2570-13097.1 0.9239.71
1,1-Dichloroethylene g/L0.50 10.0 2570-13098.1 0.4079.81
cis-1,2-Dichloroethylene g/L0.50 10.0 2570-13087.2 0.3438.72
trans-1,2-Dichloroethylene g/L0.50 10.0 2570-13084.4 1.888.44
1,2-Dichloropropane g/L0.50 10.0 2570-13082.8 2.978.28
1,3-Dichloropropane g/L0.50 10.0 2570-13088.9 3.218.89
2,2-Dichloropropane g/L0.50 10.0 25 L-0470-13055.1 5.21*5.51
1,1-Dichloropropene g/L0.50 10.0 2570-13089.7 1.808.97
cis-1,3-Dichloropropene g/L0.50 10.0 2570-13085.4 0.1178.54
trans-1,3-Dichloropropene g/L0.50 10.0 2570-13082.6 0.4838.26
Diisopropyl Ether (DIPE)g/L0.50 10.0 2570-13081.6 1.368.16
Ethylbenzene g/L0.50 10.0 2570-130100 0.79510.0
2-Hexanone (MBK)g/L5.0 100 2570-13092.9 4.4792.9
Isopropylbenzene (Cumene)g/L0.50 10.0 2570-130105 0.57110.5
p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 2570-130102 6.5510.2
Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 2570-13078.3 2.027.83
Methylene Chloride g/L5.0 10.0 2570-13085.7 2.428.57
4-Methyl-2-pentanone (MIBK)g/L5.0 100 2570-13096.2 2.9896.2
Naphthalene g/L0.50 10.0 2570-13097.1 0.5149.71
n-Propylbenzene g/L0.50 10.0 2570-130102 0.29410.2
Styrene g/L0.50 10.0 2570-13087.5 2.718.75
1,1,2,2-Tetrachloroethane g/L0.50 10.0 2570-13099.4 2.099.94
Tetrachloroethylene g/L0.50 10.0 2570-13097.0 0.1039.70
Toluene g/L0.50 10.0 2570-13092.9 0.7569.29
1,2,3-Trichlorobenzene g/L1.0 10.0 2570-13083.5 6.058.35
1,2,4-Trichlorobenzene g/L0.50 10.0 2570-13096.4 7.319.64
1,1,1-Trichloroethane g/L0.50 10.0 2570-13097.7 2.179.77
1,1,2-Trichloroethane g/L0.50 10.0 2570-13090.6 0.7709.06
Trichloroethylene g/L0.50 10.0 2570-13093.2 1.499.32
Trichlorofluoromethane (Freon 11)g/L0.50 10.0 2570-130102 0.78210.2
1,2,3-Trichloropropane g/L0.50 10.0 2570-13097.5 5.199.75
1,2,4-Trimethylbenzene g/L0.50 10.0 2570-130102 4.8410.2
1,3,5-Trimethylbenzene g/L0.50 10.0 2570-130102 0.78410.2
Vinyl Acetate g/L20 100 25 L-0470-13069.7 1.56*69.7
Vinyl Chloride g/L0.50 10.0 25 L-0260-140163 2.66*16.3
m+p Xylene g/L1.0 20.0 2570-130102 0.24520.4
o-Xylene g/L0.50 10.0 2570-130103 0.097310.3
g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 98.424.6
g/L 25.0 70-130Surrogate: Toluene-d8 97.724.4
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
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
Page 15 of 18
Table of Contents
Page 16 of 18
Table of Contents
Page 17 of 18
Table of Contents
Page 18 of 18
Table of Contents