MO-5392_18748_G_WSW_20231019_BRANDONHREREQ

October 19, 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: 18748 Enclosed please find the analytical results for a water sample collected on October 3 ,2023, from the Brandon water supply well, identified as WSW-4, located at 1053 Dallas-Bessemer City Highway, Gastonia, Gaston 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): Brandon Sample Analytical Results

,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-276-0004
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2451 Received : 10/03/2023
Gate #402
Report Date : 10/10/2023
Sample ID :
Lab No :
Sampled:WSW-4
96708 Matrix:
10/3/2023 10:31
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V38791 10/05/23 14:00
<1.80 µg/L 1.80 10.0Acetone 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500Benzene 1 10/06/23 05:50 V38792MSA
<0.210 µg/L 0.210 0.500Bromobenzene 1 10/06/23 05:50 V38792MSA
<0.420 µg/L 0.420 1.00Bromochloromethane 1 10/06/23 05:50 V38792MSA
<0.160 µg/L 0.160 0.500Bromodichloromethane 1 10/06/23 05:50 V38792MSA
<1.50 µg/L 1.50 5.00Bromoform 1 10/06/23 05:50 V38792MSA
<0.280 µg/L 0.280 1.00Bromomethane 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500n-Butylbenzene 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.500sec-Butyl benzene 1 10/06/23 05:50 V38792MSA
<0.920 µg/L 0.920 2.00tert-Butyl benzene 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500Carbon Tetrachloride 1 10/06/23 05:50 V38792MSA
<0.190 µg/L 0.190 0.500Chlorobenzene 1 10/06/23 05:50 V38792MSA
<0.190 µg/L 0.190 0.500Chlorodibromomethane 1 10/06/23 05:50 V38792MSA
<0.430 µg/L 0.430 1.00Chloroethane 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.500Chloroform 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.500Chloromethane 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.5002-Chlorotoluene 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.5004-Chlorotoluene 1 10/06/23 05:50 V38792MSA
<0.500 µg/L 0.500 0.500Di-Isopropyl Ether (DIPE)1 10/06/23 05:50 V38792MSA
<1.10 µg/L 1.10 2.001,2-Dibromo-3-Chloropropane 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.5001,2-Dibromoethane 1 10/06/23 05:50 V38792MSA
<0.230 µg/L 0.230 0.500Dibromomethane 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.5001,2-Dichlorobenzene 1 10/06/23 05:50 V38792MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 5 of 28
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-276-0004
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2451 Received : 10/03/2023
Gate #402
Report Date : 10/10/2023
Sample ID :
Lab No :
Sampled:WSW-4
96708 Matrix:
10/3/2023 10:31
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V38791 10/05/23 14:00
<0.190 µg/L 0.190 0.5001,3-Dichlorobenzene 1 10/06/23 05:50 V38792MSA
<0.210 µg/L 0.210 0.5001,4-Dichlorobenzene 1 10/06/23 05:50 V38792MSA
<1.20 µg/L 1.20 5.00Dichlorodifluoromethane 1 10/06/23 05:50 V38792MSA
<0.240 µg/L 0.240 0.5001,1-Dichloroethane 1 10/06/23 05:50 V38792MSA
<0.150 µg/L 0.150 0.5001,2-Dichloroethane 1 10/06/23 05:50 V38792MSA
<0.150 µg/L 0.150 0.5001,1-Dichloroethene 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.500cis-1,2-Dichloroethene 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500trans-1,2-Dichloroethene 1 10/06/23 05:50 V38792MSA
<0.190 µg/L 0.190 0.5001,2-Dichloropropane 1 10/06/23 05:50 V38792MSA
<0.130 µg/L 0.130 0.5001,3-Dichloropropane 1 10/06/23 05:50 V38792MSA
<0.210 µg/L 0.210 2.002,2-Dichloropropane 1 10/06/23 05:50 V38792MSA
<0.200 µg/L 0.200 0.5001,1-Dichloropropene 1 10/06/23 05:50 V38792MSA
<0.210 µg/L 0.210 0.500cis-1,3-Dichloropropene 1 10/06/23 05:50 V38792MSA
<0.150 µg/L 0.150 0.500trans-1,3-Dichloropropene 1 10/06/23 05:50 V38792MSA
<42.0 µg/L 42.0 200Ethanol 1 10/06/23 05:50 V38792MSA
<0.170 µg/L 0.170 0.500Ethylbenzene 1 10/06/23 05:50 V38792MSA
<0.350 µg/L 0.350 3.00Hexachlorobutadiene 1 10/06/23 05:50 V38792MSA
<0.380 µg/L 0.380 1.002-Hexanone 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500Isopropylbenzene 1 10/06/23 05:50 V38792MSA
<0.089 µg/L 0.089 0.5004-Isopropyl toluene 1 10/06/23 05:50 V38792MSA
0.936 J µg/L 0.710 5.00Methyl Ethyl Ketone (MEK)1 10/06/23 05:50 V38792MSA
<0.140 µg/L 0.140 1.00Methyl tert-butyl ether (MTBE)1 10/06/23 05:50 V38792MSA
<0.078 µg/L 0.078 1.004-Methyl-2-Pentanone 1 10/06/23 05:50 V38792MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 6 of 28
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-276-0004
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2451 Received : 10/03/2023
Gate #402
Report Date : 10/10/2023
Sample ID :
Lab No :
Sampled:WSW-4
96708 Matrix:
10/3/2023 10:31
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V38791 10/05/23 14:00
<0.330 µg/L 0.330 2.00Methylene Chloride 1 10/06/23 05:50 V38792MSA
<0.470 µg/L 0.470 1.00Naphthalene 1 10/06/23 05:50 V38792MSA
<0.190 µg/L 0.190 0.500n-Propylbenzene 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.500Styrene 1 10/06/23 05:50 V38792MSA
<0.160 µg/L 0.160 0.5001,1,1,2-Tetrachloroethane 1 10/06/23 05:50 V38792MSA
<0.160 µg/L 0.160 0.5001,1,2,2-Tetrachloroethane 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.500Tetrachloroethene 1 10/06/23 05:50 V38792MSA
<0.220 µg/L 0.220 0.500Toluene 1 10/06/23 05:50 V38792MSA
<0.380 µg/L 0.380 0.5001,2,3-Trichlorobenzene 1 10/06/23 05:50 V38792MSA
<0.310 µg/L 0.310 0.5001,2,4-Trichlorobenzene 1 10/06/23 05:50 V38792MSA
<0.160 µg/L 0.160 0.5001,1,1-Trichloroethane 1 10/06/23 05:50 V38792MSA
<0.096 µg/L 0.096 0.5001,1,2-Trichloroethane 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500Trichloroethene 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.500Trichlorofluoromethane 1 10/06/23 05:50 V38792MSA
<0.270 µg/L 0.270 0.5001,2,3-Trichloropropane 1 10/06/23 05:50 V38792MSA
<0.190 µg/L 0.190 0.5001,2,4-Trimethylbenzene 1 10/06/23 05:50 V38792MSA
<0.180 µg/L 0.180 0.5001,3,5-Trimethylbenzene 1 10/06/23 05:50 V38792MSA
<1.00 µg/L 1.00 5.00Vinyl Acetate 1 10/06/23 05:50 V38792MSA
<0.170 µg/L 0.170 0.500Vinyl Chloride 1 10/06/23 05:50 V38792MSA
<0.210 µg/L 0.210 0.500o-Xylene 1 10/06/23 05:50 V38792MSA
<0.420 µg/L 0.420 1.00m,p-Xylene 1 10/06/23 05:50 V38792MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 7 of 28
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-276-0004
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2451 Received : 10/03/2023
Gate #402
Report Date : 10/10/2023
Sample ID :
Lab No :
Sampled:WSW-4
96708 Matrix:
10/3/2023 10:31
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V38791 10/05/23 14:00
<0.21 µg/L 0.210 0.500Xylene (Total)1 10/06/23 05:50 V38792
Surrogate: 4-Bromofluorobenzene 94.0 Limits: 70-130%10/06/23 05:501 MSA V38792
Surrogate: Dibromofluoromethane 100 Limits: 70-130%10/06/23 05:501 MSA V38792
Surrogate: 1,2-Dichloroethane - d4 93.2 Limits: 70-130%10/06/23 05:501 MSA V38792
Surrogate: Toluene-d8 95.2 Limits: 70-130%10/06/23 05:501 MSA V38792
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 8 of 28