MO-6015_23108_G_WSW_20230705_MORRISHRE

July 5, 2023
Charles Morris P.O. Box 142 Alexis, North Carolina 28006
Re: Health Risk Evaluation of Water Supply Tracking ID: Inc. No. 23108 Dear Mr. Morris: Please find attached the Sample Analytical Results for a water sample collected from your well, identified as WSW-50, located at 116 Alexis-Lucia Road, Alexis, Gaston County, on May 5, 2023. The sample was collected and analyzed as part of the investigation of a petroleum release in the vicinity. The water sample was analyzed for specific target analytes (contaminants), which are listed on the attached Sample Analytical Results. Contaminants were detected in the water sample, as shown on the attached
Sample Analytical Results. Because contaminants were detected in the water sample, a Health Risk Evaluation of each water
supply sample was performed by an environmental toxicologist in the Division of Waste Management. The Health Risk Evaluation, which is attached also, compares the detected concentration of contaminants to acceptable concentrations and provides a recommendation for safe use of the water.
If you have any questions, please contact David Lilley at [phone] or contact me at [phone]. Sincerely, Brad C. Newton, P.G. Hydrogeologist
Mooresville Regional Office UST Section, Division of Waste Management, NCDEQ
Attachments: Morris Sample Analytical Results Health Risk Evaluation
cc: Gaston County Health Department Gaston County Manager
July 5, 2023
TO: Brad Newton Mooresville Regional Office NC UST Section
RE: Health Risk Evaluation Incident # 23108 Morris Well Sampling Results 116 Alexis-Lucia Road
Alexis, NC
During this sampling event, one contaminant was detected in the well water. The standards used to determine if the water is suitable for drinking and cooking are the United States Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina
Groundwater Standards (2L).
If the contaminant concentration exceeds the applicable standard for using the water for drinking and cooking, the contaminant concentration is further analyzed to determine if the water is suitable for other household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing.
The chart below compares the detected contaminant concentration with the applicable standard:
Sample ID Contaminant Concentration (µg/L) MCL (µg/L) 2L (µg/L)
YE08015-007 Methyl tertiary butyl ether 0.66 20
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
RECOMMENDATION: The detected contaminant did not exceed the applicable water standard. Therefore, no restrictions on the use of this water are recommended at this time.
David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
ARM Environmental Services, Inc.
WS-50
YE08015-007
05/05/2023 1321
05/08/2023
Aqueous
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 SM 6200B-SM 6200B-2011 1 05/18/2023 0416 CDA 75593
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run
Acetone 67-64-1 SM 6200B-2011 ND 1ug/L10
Benzene 71-43-2 SM 6200B-2011 ND 1ug/L0.50
Bromobenzene 108-86-1 SM 6200B-2011 ND 1ug/L0.50
Bromochloromethane 74-97-5 SM 6200B-2011 ND 1ug/L0.50
Bromodichloromethane 75-27-4 SM 6200B-2011 ND 1ug/L0.50
Bromoform 75-25-2 SM 6200B-2011 ND 1ug/L0.50
Bromomethane (Methyl bromide)74-83-9 SM 6200B-2011 ND 1ug/L0.50
2-Butanone (MEK)78-93-3 SM 6200B-2011 ND 1ug/L10
n-Butylbenzene 104-51-8 SM 6200B-2011 ND 1ug/L0.50
sec-Butylbenzene 135-98-8 SM 6200B-2011 ND 1ug/L0.50
tert-Butylbenzene 98-06-6 SM 6200B-2011 ND 1ug/L0.50
Carbon tetrachloride 56-23-5 SM 6200B-2011 ND 1ug/L0.50
Chlorobenzene 108-90-7 SM 6200B-2011 ND 1ug/L0.50
Chloroethane 75-00-3 SM 6200B-2011 ND 1ug/L0.50
Chloroform 67-66-3 SM 6200B-2011 ND 1ug/L0.50
Chloromethane (Methyl chloride)74-87-3 SM 6200B-2011 ND 1ug/L0.50
2-Chlorotoluene 95-49-8 SM 6200B-2011 ND 1ug/L0.50
4-Chlorotoluene 106-43-4 SM 6200B-2011 ND 1ug/L0.50
Dibromochloromethane 124-48-1 SM 6200B-2011 ND 1ug/L0.50
1,2-Dibromoethane (EDB)106-93-4 SM 6200B-2011 ND 1ug/L0.50
Dibromomethane (Methylene bromide)74-95-3 SM 6200B-2011 ND 1ug/L0.50
1,2-Dichlorobenzene 95-50-1 SM 6200B-2011 ND 1ug/L0.50
1,3-Dichlorobenzene 541-73-1 SM 6200B-2011 ND 1ug/L0.50
1,4-Dichlorobenzene 106-46-7 SM 6200B-2011 ND 1ug/L0.50
Dichlorodifluoromethane 75-71-8 SM 6200B-2011 ND 1ug/L0.50
1,1-Dichloroethane 75-34-3 SM 6200B-2011 ND 1ug/L0.50
1,2-Dichloroethane 107-06-2 SM 6200B-2011 ND 1ug/L0.50
1,1-Dichloroethene 75-35-4 SM 6200B-2011 ND 1ug/L0.50
cis-1,2-Dichloroethene 156-59-2 SM 6200B-2011 ND 1ug/L0.50
trans-1,2-Dichloroethene 156-60-5 SM 6200B-2011 ND 1ug/L0.50
1,2-Dichloropropane 78-87-5 SM 6200B-2011 ND 1ug/L0.50
1,3-Dichloropropane 142-28-9 SM 6200B-2011 ND 1ug/L0.50
2,2-Dichloropropane 594-20-7 SM 6200B-2011 ND 1ug/L0.50
1,1-Dichloropropene 563-58-6 SM 6200B-2011 ND 1ug/L0.50
cis-1,3-Dichloropropene 10061-01-5 SM 6200B-2011 ND 1ug/L0.50
trans-1,3-Dichloropropene 10061-02-6 SM 6200B-2011 ND 1ug/L0.50
Diisopropyl ether (IPE)108-20-3 SM 6200B-2011 ND 1ug/L0.50
Ethylbenzene 100-41-4 SM 6200B-2011 ND 1ug/L0.50
Hexachlorobutadiene 87-68-3 SM 6200B-2011 ND 1ug/L0.50
2-Hexanone 591-78-6 SM 6200B-2011 ND 1ug/L10
Isopropylbenzene (Cumene)98-82-8 SM 6200B-2011 ND 1ug/L0.50
p-Isopropyltoluene (p-Cymene)99-87-6 SM 6200B-2011 ND 1ug/L0.50
Methyl tertiary butyl ether (MTBE)1634-04-4 SM 6200B-2011 0.66 1ug/L0.50
4-Methyl-2-pentanone 108-10-1 SM 6200B-2011 ND 1ug/L10
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the LOQ N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failureW = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
Page 23 of 28
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
ARM Environmental Services, Inc.
WS-50
YE08015-007
05/05/2023 1321
05/08/2023
Aqueous
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 SM 6200B-SM 6200B-2011 1 05/18/2023 0416 CDA 75593
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run
Methylene chloride 75-09-2 SM 6200B-2011 ND 1ug/L0.50
Naphthalene 91-20-3 SM 6200B-2011 ND 1ug/L0.50
n-Propylbenzene 103-65-1 SM 6200B-2011 ND 1ug/L0.50
Styrene 100-42-5 SM 6200B-2011 ND 1ug/L0.50
1,1,1,2-Tetrachloroethane 630-20-6 SM 6200B-2011 ND 1ug/L0.50
1,1,2,2-Tetrachloroethane 79-34-5 SM 6200B-2011 ND 1ug/L0.50
Tetrachloroethene 127-18-4 SM 6200B-2011 ND 1ug/L0.50
Toluene 108-88-3 SM 6200B-2011 ND 1ug/L0.50
1,1,2-Trichloro-1,2,2-Trifluoroethane 76-13-1 SM 6200B-2011 ND 1ug/L0.50
1,2,3-Trichlorobenzene 87-61-6 SM 6200B-2011 ND 1ug/L0.50
1,2,4-Trichlorobenzene 120-82-1 SM 6200B-2011 ND 1ug/L0.50
1,1,1-Trichloroethane 71-55-6 SM 6200B-2011 ND 1ug/L0.50
1,1,2-Trichloroethane 79-00-5 SM 6200B-2011 ND 1ug/L0.50
Trichloroethene 79-01-6 SM 6200B-2011 ND 1ug/L0.50
Trichlorofluoromethane 75-69-4 SM 6200B-2011 ND 1ug/L0.50
1,2,3-Trichloropropane 96-18-4 SM 6200B-2011 ND 1ug/L0.50
1,3,5-Trimethylbenzene (Mesitylene)108-67-8 SM 6200B-2011 ND 1ug/L0.50
1,2,4-Trimethylbenzene 95-63-6 SM 6200B-2011 ND 1ug/L0.50
Vinyl chloride 75-01-4 SM 6200B-2011 ND 1ug/L0.50
m+p - Xylenes 179601-23-1 SM 6200B-2011 ND 1ug/L0.50
o - Xylenes 95-47-6 SM 6200B-2011 ND 1ug/L0.50
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 111 70-130
Bromofluorobenzene 90 70-130
Toluene-d8 96 70-130
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the LOQ N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failureW = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 24 of 28
EDB & DBCP by Microextraction
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
ARM Environmental Services, Inc.
WS-50
YE08015-007
05/05/2023 1321
05/08/2023
Aqueous
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 504.1 504.1 1 05/12/2023 1631 MEZ 05/12/2023 1038 75138
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run
1,2-Dibromoethane (EDB)106-93-4 504.1 ND 1ug/L0.0098
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,1,1,2-Tetrachloroethane 85 57-137
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the LOQ N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failureW = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 25 of 28