MO-2489_3898_G_WSW_20230713_LITTLEHREREQ

July 13, 2023 MEMORANDUM
TO: David Lilley, Environmental Toxicologist, Division of Waste Management, 1646 Mail Service Center, Raleigh, NC 27699-1646 (FAX [phone])
FROM: Brad Newton, Mooresville Regional Office, UST Section SUBJECT: Request for Health Risk Evaluation of Water Supply Tracking ID: Incident Number: 3898 Enclosed please find the analytical results for a water sample collected on June 26, 2023, from the Little water supply well, identified as WSW-Little, located at 5683 East NC Highway 150, Denver, Catawba County. Please perform a health risk evaluation and send the evaluation with your recommendation and a copy of this memo to me. I will then forward the health risk evaluation and recommendation to any well users.
If you have questions or need additional information, please contact me at the address or telephone number below. Thank you for your assistance. Attachment(s): Little Sample Analytical Results
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-178-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 06/27/2023
Express Food Mart
Report Date : 07/10/2023
Sample ID :
Lab No :
Sampled:WSW-Little
99385 Matrix:
6/26/2023 8:20
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V35033 07/05/23 14:00
<1.80 µg/L 1.80 10.0Acetone 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500Benzene 1 07/06/23 09:05 V35034MSA
<0.210 µg/L 0.210 0.500Bromobenzene 1 07/06/23 09:05 V35034MSA
<0.420 µg/L 0.420 1.00Bromochloromethane 1 07/06/23 09:05 V35034MSA
<0.160 µg/L 0.160 0.500Bromodichloromethane 1 07/06/23 09:05 V35034MSA
<1.50 µg/L 1.50 5.00Bromoform 1 07/06/23 09:05 V35034MSA
<0.280 µg/L 0.280 1.00Bromomethane 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500n-Butylbenzene 1 07/06/23 09:05 V35034MSA
<0.200 µg/L 0.200 0.500
sec-Butyl benzene 1 07/06/23 09:05 V35034MSA
<0.920 µg/L 0.920 2.00tert-Butyl benzene 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500Carbon Tetrachloride 1 07/06/23 09:05 V35034MSA
<0.190 µg/L 0.190 0.500Chlorobenzene 1 07/06/23 09:05 V35034MSA
<0.190 µg/L 0.190 0.500Chlorodibromomethane 1 07/06/23 09:05 V35034MSA
<0.430 µg/L 0.430 1.00Chloroethane 1 07/06/23 09:05 V35034MSA
0.500 µg/L 0.220 0.500Chloroform 1 07/06/23 09:05 V35034MSA
<0.220 µg/L 0.220 0.500
Chloromethane 1 07/06/23 09:05 V35034MSA
<0.200 µg/L 0.200 0.5002-Chlorotoluene 1 07/06/23 09:05 V35034MSA
<0.200 µg/L 0.200 0.5004-Chlorotoluene 1 07/06/23 09:05 V35034MSA
<0.500 µg/L 0.500 0.500Di-Isopropyl Ether (DIPE)1 07/06/23 09:05 V35034MSA
<1.10 µg/L 1.10 2.001,2-Dibromo-3-Chloropropane 1 07/06/23 09:05 V35034MSA
<0.230 µg/L 0.230 0.500Dibromomethane 1 07/06/23 09:05 V35034MSA
<0.220 µg/L 0.220 0.5001,2-Dichlorobenzene 1 07/06/23 09:05 V35034MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 5 of 25
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-178-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 06/27/2023
Express Food Mart
Report Date : 07/10/2023
Sample ID :
Lab No :
Sampled:WSW-Little
99385 Matrix:
6/26/2023 8:20
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V35033 07/05/23 14:00
<0.190 µg/L 0.190 0.5001,3-Dichlorobenzene 1 07/06/23 09:05 V35034MSA
<0.210 µg/L 0.210 0.5001,4-Dichlorobenzene 1 07/06/23 09:05 V35034MSA
<1.20 µg/L 1.20 5.00Dichlorodifluoromethane 1 07/06/23 09:05 V35034MSA
<0.240 µg/L 0.240 0.5001,1-Dichloroethane 1 07/06/23 09:05 V35034MSA
1.62 µg/L 0.150 0.5001,2-Dichloroethane 1 07/06/23 09:05 V35034MSA
<0.150 µg/L 0.150 0.5001,1-Dichloroethene 1 07/06/23 09:05 V35034MSA
<0.200 µg/L 0.200 0.500cis-1,2-Dichloroethene 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500trans-1,2-Dichloroethene 1 07/06/23 09:05 V35034MSA
<0.190 µg/L 0.190 0.500
1,2-Dichloropropane 1 07/06/23 09:05 V35034MSA
<0.130 µg/L 0.130 0.5001,3-Dichloropropane 1 07/06/23 09:05 V35034MSA
<0.210 µg/L 0.210 2.002,2-Dichloropropane 1 07/06/23 09:05 V35034MSA
<0.200 µg/L 0.200 0.5001,1-Dichloropropene 1 07/06/23 09:05 V35034MSA
<0.210 µg/L 0.210 0.500cis-1,3-Dichloropropene 1 07/06/23 09:05 V35034MSA
<0.150 µg/L 0.150 0.500trans-1,3-Dichloropropene 1 07/06/23 09:05 V35034MSA
<42.0 µg/L 42.0 200Ethanol 1 07/06/23 09:05 V35034MSA
<0.170 µg/L 0.170 0.500
Ethylbenzene 1 07/06/23 09:05 V35034MSA
<0.350 µg/L 0.350 3.00Hexachlorobutadiene 1 07/06/23 09:05 V35034MSA
<0.380 µg/L 0.380 1.002-Hexanone 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500Isopropylbenzene 1 07/06/23 09:05 V35034MSA
<0.089 µg/L 0.089 0.5004-Isopropyl toluene 1 07/06/23 09:05 V35034MSA
<0.710 µg/L 0.710 5.00Methyl Ethyl Ketone (MEK)1 07/06/23 09:05 V35034MSA
<0.140 µg/L 0.140 1.00Methyl tert-butyl ether (MTBE)1 07/06/23 09:05 V35034MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 6 of 25
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-178-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 06/27/2023
Express Food Mart
Report Date : 07/10/2023
Sample ID :
Lab No :
Sampled:WSW-Little
99385 Matrix:
6/26/2023 8:20
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V35033 07/05/23 14:00
<0.078 µg/L 0.078 1.004-Methyl-2-Pentanone 1 07/06/23 09:05 V35034MSA
<0.330 µg/L 0.330 2.00Methylene Chloride 1 07/06/23 09:05 V35034MSA
<0.470 µg/L 0.470 1.00Naphthalene 1 07/06/23 09:05 V35034MSA
<0.190 µg/L 0.190 0.500n-Propylbenzene 1 07/06/23 09:05 V35034MSA
<0.220 µg/L 0.220 0.500Styrene 1 07/06/23 09:05 V35034MSA
<0.160 µg/L 0.160 0.5001,1,1,2-Tetrachloroethane 1 07/06/23 09:05 V35034MSA
<0.160 µg/L 0.160 0.5001,1,2,2-Tetrachloroethane 1 07/06/23 09:05 V35034MSA
<0.220 µg/L 0.220 0.500Tetrachloroethene 1 07/06/23 09:05 V35034MSA
<0.220 µg/L 0.220 0.500
Toluene 1 07/06/23 09:05 V35034MSA
<0.380 µg/L 0.380 0.5001,2,3-Trichlorobenzene 1 07/06/23 09:05 V35034MSA
<0.310 µg/L 0.310 0.5001,2,4-Trichlorobenzene 1 07/06/23 09:05 V35034MSA
<0.160 µg/L 0.160 0.5001,1,1-Trichloroethane 1 07/06/23 09:05 V35034MSA
<0.096 µg/L 0.096 0.5001,1,2-Trichloroethane 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500Trichloroethene 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.500Trichlorofluoromethane 1 07/06/23 09:05 V35034MSA
<0.270 µg/L 0.270 0.500
1,2,3-Trichloropropane 1 07/06/23 09:05 V35034MSA
<0.190 µg/L 0.190 0.5001,2,4-Trimethylbenzene 1 07/06/23 09:05 V35034MSA
<0.180 µg/L 0.180 0.5001,3,5-Trimethylbenzene 1 07/06/23 09:05 V35034MSA
<1.00 µg/L 1.00 5.00Vinyl Acetate 1 07/06/23 09:05 V35034MSA
<0.170 µg/L 0.170 0.500Vinyl Chloride 1 07/06/23 09:05 V35034MSA
<0.210 µg/L 0.210 0.500o-Xylene 1 07/06/23 09:05 V35034MSA
<0.420 µg/L 0.420 1.00m,p-Xylene 1 07/06/23 09:05 V35034MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 7 of 25
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-178-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 06/27/2023
Express Food Mart
Report Date : 07/10/2023
Sample ID :
Lab No :
Sampled:WSW-Little
99385 Matrix:
6/26/2023 8:20
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V35033 07/05/23 14:00
<0.21 µg/L 0.210 0.500Xylene (Total)1 07/06/23 09:05 V35034
Surrogate: 4-Bromofluorobenzene 93.0 Limits: 70-130%07/06/23 09:051 MSA V35034
Surrogate: Dibromofluoromethane 96.0 Limits: 70-130%07/06/23 09:051 MSA V35034
Surrogate: 1,2-Dichloroethane - d4 93.0 Limits: 70-130%07/06/23 09:051 MSA V35034
Surrogate: Toluene-d8 94.4 Limits: 70-130%07/06/23 09:051 MSA V35034
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
EPA-504.1(PREP)
EPA-504.1 Prep Batch(es):V34799 06/29/23 08:45
<0.0207 µg/L 0.02071,2-Dibromoethane 1 06/29/23 14:53 V34824TJW
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 8 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
Associated Lab Samples: 99385, 99386, 99387
LRB-V35033 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
07/06/23 04:5710.01.80<1.80µg/LAcetone
07/06/23 04:570.5000.180<0.180µg/LBenzene
07/06/23 04:570.5000.210<0.210µg/LBromobenzene
07/06/23 04:571.000.420<0.420µg/LBromochloromethane
07/06/23 04:570.5000.160<0.160µg/LBromodichloromethane
07/06/23 04:575.001.50<1.50µg/LBromoform
07/06/23 04:571.000.280<0.280µg/LBromomethane
07/06/23 04:570.5000.180<0.180µg/Ln-Butylbenzene
07/06/23 04:570.5000.200<0.200µg/Lsec-Butyl benzene
07/06/23 04:572.000.920<0.920µg/Ltert-Butyl benzene
07/06/23 04:570.5000.180<0.180µg/LCarbon Tetrachloride
07/06/23 04:570.5000.190<0.190µg/LChlorobenzene
07/06/23 04:570.5000.190<0.190µg/LChlorodibromomethane
07/06/23 04:571.000.430<0.430µg/LChloroethane
07/06/23 04:570.5000.220<0.220µg/LChloroform
07/06/23 04:570.5000.220<0.220µg/LChloromethane
07/06/23 04:570.5000.200<0.200µg/L2-Chlorotoluene
07/06/23 04:570.5000.200<0.200µg/L4-Chlorotoluene
07/06/23 04:570.5000.500<0.500µg/LDi-Isopropyl Ether (DIPE)
07/06/23 04:572.001.10<1.10µg/L1,2-Dibromo-3-Chloropropane
07/06/23 04:570.5000.200<0.200µg/L1,2-Dibromoethane
07/06/23 04:570.5000.230<0.230µg/LDibromomethane
07/06/23 04:570.5000.220<0.220µg/L1,2-Dichlorobenzene
07/06/23 04:570.5000.190<0.190µg/L1,3-Dichlorobenzene
07/06/23 04:570.5000.210<0.210µg/L1,4-Dichlorobenzene
07/06/23 04:575.001.20<1.20µg/LDichlorodifluoromethane
07/06/23 04:570.5000.240<0.240µg/L1,1-Dichloroethane
Page 1 of 7Date:07/10/2023 01:07 PM
Page 17 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
Associated Lab Samples: 99385, 99386, 99387
LRB-V35033 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
07/06/23 04:570.5000.150<0.150µg/L1,2-Dichloroethane
07/06/23 04:570.5000.150<0.150µg/L1,1-Dichloroethene
07/06/23 04:570.5000.200<0.200µg/Lcis-1,2-Dichloroethene
07/06/23 04:570.5000.180<0.180µg/Ltrans-1,2-Dichloroethene
07/06/23 04:570.5000.190<0.190µg/L1,2-Dichloropropane
07/06/23 04:570.5000.130<0.130µg/L1,3-Dichloropropane
07/06/23 04:572.000.210<0.210µg/L2,2-Dichloropropane
07/06/23 04:570.5000.200<0.200µg/L1,1-Dichloropropene
07/06/23 04:570.5000.210<0.210µg/Lcis-1,3-Dichloropropene
07/06/23 04:570.5000.150<0.150µg/Ltrans-1,3-Dichloropropene
07/06/23 04:5720042.0<42.0µg/LEthanol
07/06/23 04:570.5000.170<0.170µg/LEthylbenzene
07/06/23 04:573.000.350<0.350µg/LHexachlorobutadiene
07/06/23 04:571.000.380<0.380µg/L2-Hexanone
07/06/23 04:570.5000.180<0.180µg/LIsopropylbenzene
07/06/23 04:570.5000.089<0.089µg/L4-Isopropyl toluene
07/06/23 04:575.000.710<0.710µg/LMethyl Ethyl Ketone (MEK)
07/06/23 04:571.000.140<0.140µg/LMethyl tert-butyl ether (MTBE)
07/06/23 04:571.000.078<0.078µg/L4-Methyl-2-Pentanone
07/06/23 04:572.000.330<0.330µg/LMethylene Chloride
07/06/23 04:571.000.470<0.470µg/LNaphthalene
07/06/23 04:570.5000.190<0.190µg/Ln-Propylbenzene
07/06/23 04:570.5000.220<0.220µg/LStyrene
07/06/23 04:570.5000.160<0.160µg/L1,1,1,2-Tetrachloroethane
07/06/23 04:570.5000.160<0.160µg/L1,1,2,2-Tetrachloroethane
07/06/23 04:570.5000.220<0.220µg/LTetrachloroethene
07/06/23 04:570.5000.220<0.220µg/LToluene
Page 2 of 7Date:07/10/2023 01:07 PM
Page 18 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
Associated Lab Samples: 99385, 99386, 99387
LRB-V35033 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
07/06/23 04:570.5000.380<0.380µg/L1,2,3-Trichlorobenzene
07/06/23 04:570.5000.310<0.310µg/L1,2,4-Trichlorobenzene
07/06/23 04:570.5000.160<0.160µg/L1,1,1-Trichloroethane
07/06/23 04:570.5000.096<0.096µg/L1,1,2-Trichloroethane
07/06/23 04:570.5000.180<0.180µg/LTrichloroethene
07/06/23 04:570.5000.180<0.180µg/LTrichlorofluoromethane
07/06/23 04:570.5000.270<0.270µg/L1,2,3-Trichloropropane
07/06/23 04:570.5000.190<0.190µg/L1,2,4-Trimethylbenzene
07/06/23 04:570.5000.180<0.180µg/L1,3,5-Trimethylbenzene
07/06/23 04:575.001.00<1.00µg/LVinyl Acetate
07/06/23 04:570.5000.170<0.170µg/LVinyl Chloride
07/06/23 04:570.5000.210<0.210µg/Lo-Xylene
07/06/23 04:571.000.420<0.420µg/Lm,p-Xylene
07/06/23 04:574-Bromofluorobenzene (S)94.4 70-130
07/06/23 04:57Dibromofluoromethane (S)96.2 70-130
07/06/23 04:571,2-Dichloroethane - d4 (S)93.6 70-130
07/06/23 04:57Toluene-d8 (S)93.6 70-130
LCS-V35033 LCSD-V35033Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
40.4 10110240.640.0µg/LAcetone 40-160 0.4 20.0
19.1 95.596.019.220.0µg/LBenzene 70-130 0.5 20.0
17.7 88.587.517.520.0µg/LBromobenzene 70-130 1.1 20.0
20.2 10199.019.820.0µg/LBromochloromethane 70-130 2.0 20.0
17.9 89.593.018.620.0µg/LBromodichloromethane 70-130 3.8 20.0
Page 3 of 7Date:07/10/2023 01:07 PM
Page 19 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
LCS-V35033 LCSD-V35033Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
18.8 94.090.018.020.0µg/LBromoform 70-130 4.3 20.0
19.4 97.097.519.520.0µg/LBromomethane 60-140 0.5 20.0
18.2 91.089.017.820.0µg/Ln-Butylbenzene 70-130 2.2 20.0
17.9 89.590.518.120.0µg/Lsec-Butyl benzene 70-130 1.1 20.0
18.1 90.590.518.120.0µg/Ltert-Butyl benzene 70-130 0.0 20.0
18.4 92.091.018.220.0µg/LCarbon Tetrachloride 70-130 1.0 20.0
19.5 97.597.519.520.0µg/LChlorobenzene 70-130 0.0 20.0
18.2 91.090.018.020.0µg/LChlorodibromomethane 70-130 1.1 20.0
19.9 99.599.519.920.0µg/LChloroethane 60-140 0.0 20.0
19.2 96.094.518.920.0µg/LChloroform 70-130 1.5 20.0
16.3 81.586.517.320.0µg/LChloromethane 60-140 5.9 20.0
17.9 89.588.017.620.0µg/L2-Chlorotoluene 70-130 1.6 20.0
17.2 86.087.517.520.0µg/L4-Chlorotoluene 70-130 1.7 20.0
17.0 85.085.517.120.0µg/LDi-Isopropyl Ether (DIPE)70-130 0.5 20.0
19.3 96.592.018.420.0µg/L1,2-Dibromo-3-Chloropropane 70-130 4.7 20.0
18.7 93.593.018.620.0µg/L1,2-Dibromoethane 70-130 0.5 20.0
19.3 96.598.019.620.0µg/LDibromomethane 70-130 1.5 20.0
18.9 94.595.019.020.0µg/L1,2-Dichlorobenzene 70-130 0.5 20.0
18.8 94.094.518.920.0µg/L1,3-Dichlorobenzene 70-130 0.5 20.0
18.5 92.593.018.620.0µg/L1,4-Dichlorobenzene 70-130 0.5 20.0
19.9 99.598.519.720.0µg/LDichlorodifluoromethane 60-140 1.0 20.0
18.5 92.593.518.720.0µg/L1,1-Dichloroethane 70-130 1.0 20.0
18.2 91.091.518.320.0µg/L1,2-Dichloroethane 70-130 0.5 20.0
19.3 96.595.519.120.0µg/L1,1-Dichloroethene 70-130 1.0 20.0
17.9 89.589.017.820.0µg/Lcis-1,2-Dichloroethene 70-130 0.5 20.0
18.3 91.592.518.520.0µg/Ltrans-1,2-Dichloroethene 70-130 1.0 20.0
Page 4 of 7Date:07/10/2023 01:07 PM
Page 20 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
LCS-V35033 LCSD-V35033Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
18.0 90.091.018.220.0µg/L1,2-Dichloropropane 70-130 1.1 20.0
17.9 89.588.517.720.0µg/L1,3-Dichloropropane 70-130 1.1 20.0
16.5 82.584.016.820.0µg/L2,2-Dichloropropane 70-130 1.8 20.0
20.5 10310120.120.0µg/L1,1-Dichloropropene 70-130 1.9 20.0
17.9 89.589.017.820.0µg/Lcis-1,3-Dichloropropene 70-130 0.5 20.0
17.9 89.587.017.420.0µg/Ltrans-1,3-Dichloropropene 70-130 2.8 20.0
508 10288.4442500µg/LEthanol 60-140 13.8 20.0
17.8 89.090.018.020.0µg/LEthylbenzene 70-130 1.1 20.0
20.1 10110020.020.0µg/LHexachlorobutadiene 70-130 0.4 20.0
15.2 76.076.515.320.0µg/L2-Hexanone 60-140 0.6 20.0
18.1 90.590.018.020.0µg/LIsopropylbenzene 70-130 0.5 20.0
18.7 93.593.518.720.0µg/L4-Isopropyl toluene 70-130 0.0 20.0
16.4 82.080.516.120.0µg/LMethyl Ethyl Ketone (MEK)60-140 1.8 20.0
19.1 95.593.518.720.0µg/LMethyl tert-butyl ether (MTBE)70-130 2.1 20.0
15.6 78.078.515.720.0µg/L4-Methyl-2-Pentanone 60-140 0.6 20.0
18.5 92.592.518.520.0µg/LMethylene Chloride 70-130 0.0 20.0
15.4 77.077.515.520.0µg/LNaphthalene 70-130 0.6 20.0
17.4 87.088.517.720.0µg/Ln-Propylbenzene 70-130 1.7 20.0
19.3 96.596.019.220.0µg/LStyrene 70-130 0.5 20.0
19.2 96.094.518.920.0µg/L1,1,1,2-Tetrachloroethane 70-130 1.5 20.0
17.3 86.585.517.120.0µg/L1,1,2,2-Tetrachloroethane 70-130 1.1 20.0
19.9 99.599.519.920.0µg/LTetrachloroethene 70-130 0.0 20.0
18.7 93.594.518.920.0µg/LToluene 70-130 1.0 20.0
19.8 99.010020.020.0µg/L1,2,3-Trichlorobenzene 70-130 1.0 20.0
19.6 98.010120.120.0µg/L1,2,4-Trichlorobenzene 70-130 2.5 20.0
19.2 96.099.019.820.0µg/L1,1,1-Trichloroethane 70-130 3.0 20.0
Page 5 of 7Date:07/10/2023 01:07 PM
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Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V35034QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V35033
LCS-V35033 LCSD-V35033Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
19.5 97.597.519.520.0µg/L1,1,2-Trichloroethane 70-130 0.0 20.0
20.8 10410420.720.0µg/LTrichloroethene 70-130 0.4 20.0
20.2 10110220.420.0µg/LTrichlorofluoromethane 60-140 0.9 20.0
18.0 90.087.517.520.0µg/L1,2,3-Trichloropropane 70-130 2.8 20.0
18.1 90.590.518.120.0µg/L1,2,4-Trimethylbenzene 70-130 0.0 20.0
18.5 92.591.518.320.0µg/L1,3,5-Trimethylbenzene 70-130 1.0 20.0
17.5 87.595.019.020.0µg/LVinyl Acetate 60-140 8.2 20.0
19.4 97.095.019.020.0µg/LVinyl Chloride 60-140 2.0 20.0
18.7 93.591.518.320.0µg/Lo-Xylene 70-130 2.1 20.0
38.8 97.097.238.940.0µg/Lm,p-Xylene 70-130 0.2 20.0
92.893.04-Bromofluorobenzene (S)70-130
97.295.4Dibromofluoromethane (S)70-130
94.895.01,2-Dichloroethane - d4 (S)70-130
94.693.4Toluene-d8 (S)70-130
Page 6 of 7Date:07/10/2023 01:07 PM
Page 22 of 25
Quality Control Data
23-178-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
EDB and DBCP by Microextraction GC/ECD
EPA-504.1
V34824QC Analytical Batch(es):
Analysis Method:
Analysis Description:
EPA-504.1(PREP)
QC Prep:V34799
Associated Lab Samples: 99385, 99386
LRB-V34799 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLBlank
ResultUnits
06/29/23 11:390.0200< 0.0200µg/L1,2-Dibromoethane
LCS-V34799 LCSD-V34799Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
0.306 1221040.2590.250µg/L1,2-Dibromoethane 70-130 16.6 20.0
V 99078-DUP-V34799Duplicate
Max RPD
Parameter
AnalyzedRPDDUP
Result
Result
Units
20.0 06/29/23 13:063.60.1380.133µg/L1,2-Dibromoethane
V 99074-MS-V34799Matrix Spike
MS Result
Parameter
Max
RPD
MS
%Rec
MSD
Result
MSD
Spike
Conc.
MS Spike
Conc.ResultUnits
%Rec
Limits
0.275 1070.258< 0.0207µg/L1,2-Dibromoethane 70-130
Page 7 of 7Date:07/10/2023 01:07 PM
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