MO-9254_40718_G_WSW_20230418_RAMSEY8HRE

March 18, 2023 Charles Ramsey
816 Woodlawn Avenue Belmont, North Carolina 28012-2134
Re: Health Risk Evaluation of Water Supply Tracking ID: Inc. No. 40718 Dear Mr. Ramsey: Please find attached the Sample Analytical Results for water samples collected from your well, identified as WSW-8, located at 1923 Perfection Road, Gaston County, on March 31, 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 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 the address or telephone
number listed below. Sincerely, Brad C. Newton, P.G. Hydrogeologist Mooresville Regional Office UST Section, Division of Waste Management, NCDEQ
Attachments: Ramsey Sample Analytical Results Health Risk Evaluation
cc: Occupant – 1923 Perfection Road Belmont, NC 28012 Gaston County Health Department Gaston County Manager
April 18, 2023
TO: Brad Newton
Mooresville Regional Office NC UST Section
RE: Health Risk Evaluation
Incident # 40718 Ramsey Well Sampling Results 1923 Perfection Road Belmont, NC
During this sampling event, two contaminants were 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 any contaminant concentrations exceed applicable standards for using the water for drinking and cooking, those contaminant concentrations are 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 concentrations with the applicable standards:
Sample ID Contaminant Concentration (µg/L) MCL (µg/L) 2L (µg/L)
92659969013 Chloroform 0.52 80*
Methyl tert-butyl ether 1.1 20
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
* As total trihalomethanes.
RECOMMENDATION: None of the contaminants detected exceeded the applicable water standards. Therefore, no restrictions on the use of this water are recommended at this time.
David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92659969
FOUR POINT 76
Sample:WSW-8 Lab ID:92659969013 Collected:03/31/23 11:40 Received:03/31/23 14:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene ND ug/L 04/05/23 00:45 71-43-20.50 1
Bromobenzene ND ug/L 04/05/23 00:45 108-86-10.50 1
Bromochloromethane ND ug/L 04/05/23 00:45 74-97-50.50 1
Bromodichloromethane ND ug/L 04/05/23 00:45 75-27-40.50 1
Bromoform ND ug/L 04/05/23 00:45 75-25-20.50 1
Bromomethane ND ug/L 04/05/23 00:45 74-83-95.0 1
n-Butylbenzene ND ug/L 04/05/23 00:45 104-51-80.50 1
sec-Butylbenzene ND ug/L 04/05/23 00:45 135-98-80.50 1
tert-Butylbenzene ND ug/L 04/05/23 00:45 98-06-60.50 1
Carbon tetrachloride ND ug/L 04/05/23 00:45 56-23-50.50 1
Chlorobenzene ND ug/L 04/05/23 00:45 108-90-70.50 1
Chloroethane ND ug/L 04/05/23 00:45 75-00-31.0 1
Chloroform 0.52 ug/L 04/05/23 00:45 67-66-30.50 1
Chloromethane ND ug/L 04/05/23 00:45 74-87-31.0 1
2-Chlorotoluene ND ug/L 04/05/23 00:45 95-49-80.50 1
4-Chlorotoluene ND ug/L 04/05/23 00:45 106-43-40.50 1
1,2-Dibromo-3-chloropropane ND ug/L 04/05/23 00:45 96-12-81.0 1
Dibromochloromethane ND ug/L 04/05/23 00:45 124-48-10.50 1
1,2-Dibromoethane (EDB)ND ug/L 04/05/23 00:45 106-93-40.50 1
Dibromomethane ND ug/L 04/05/23 00:45 74-95-30.50 1
1,2-Dichlorobenzene ND ug/L 04/05/23 00:45 95-50-10.50 1
1,3-Dichlorobenzene ND ug/L 04/05/23 00:45 541-73-10.50 1
1,4-Dichlorobenzene ND ug/L 04/05/23 00:45 106-46-70.50 1
Dichlorodifluoromethane ND ug/L 04/05/23 00:45 75-71-80.50 1
1,1-Dichloroethane ND ug/L 04/05/23 00:45 75-34-30.50 1
1,2-Dichloroethane ND ug/L 04/05/23 00:45 107-06-20.50 1
1,1-Dichloroethene ND ug/L 04/05/23 00:45 75-35-40.50 1
cis-1,2-Dichloroethene ND ug/L 04/05/23 00:45 156-59-20.50 1
trans-1,2-Dichloroethene ND ug/L 04/05/23 00:45 156-60-50.50 1
1,2-Dichloropropane ND ug/L 04/05/23 00:45 78-87-50.50 1
1,3-Dichloropropane ND ug/L 04/05/23 00:45 142-28-90.50 1
2,2-Dichloropropane ND ug/L 04/05/23 00:45 594-20-70.50 1
1,1-Dichloropropene ND ug/L 04/05/23 00:45 563-58-60.50 1
cis-1,3-Dichloropropene ND ug/L 04/05/23 00:45 10061-01-50.50 1
trans-1,3-Dichloropropene ND ug/L 04/05/23 00:45 10061-02-60.50 1
Diisopropyl ether ND ug/L 04/05/23 00:45 108-20-30.50 1
Ethylbenzene ND ug/L 04/05/23 00:45 100-41-40.50 1
Hexachloro-1,3-butadiene ND ug/L 04/05/23 00:45 87-68-32.0 1
Isopropylbenzene (Cumene)ND ug/L 04/05/23 00:45 98-82-80.50 1
Methylene Chloride ND ug/L 04/05/23 00:45 75-09-22.0 1
Methyl-tert-butyl ether 1.1 ug/L 04/05/23 00:45 1634-04-40.50 1
Naphthalene ND ug/L 04/05/23 00:45 91-20-32.0 1
n-Propylbenzene ND ug/L 04/05/23 00:45 103-65-10.50 1
Styrene ND ug/L 04/05/23 00:45 100-42-50.50 1
1,1,1,2-Tetrachloroethane ND ug/L 04/05/23 00:45 630-20-60.50 1
1,1,2,2-Tetrachloroethane ND ug/L 04/05/23 00:45 79-34-50.50 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/12/2023 01:13 PM
Pace Analytical Services, LLC
2225 Riverside Dr.
Asheville, NC 28804
[phone]
Page 28 of 64
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92659969
FOUR POINT 76
Sample:WSW-8 Lab ID:92659969013 Collected:03/31/23 11:40 Received:03/31/23 14:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Tetrachloroethene ND ug/L 04/05/23 00:45 127-18-40.50 1
Toluene ND ug/L 04/05/23 00:45 108-88-30.50 1
1,2,3-Trichlorobenzene ND ug/L 04/05/23 00:45 87-61-62.0 1
1,2,4-Trichlorobenzene ND ug/L 04/05/23 00:45 120-82-12.0 1
1,1,1-Trichloroethane ND ug/L 04/05/23 00:45 71-55-60.50 1
1,1,2-Trichloroethane ND ug/L 04/05/23 00:45 79-00-50.50 1
Trichloroethene ND ug/L 04/05/23 00:45 79-01-60.50 1
Trichlorofluoromethane ND ug/L 04/05/23 00:45 75-69-41.0 1
1,2,3-Trichloropropane ND ug/L 04/05/23 00:45 96-18-40.50 1
1,2,4-Trimethylbenzene ND ug/L 04/05/23 00:45 95-63-60.50 1
1,3,5-Trimethylbenzene ND ug/L 04/05/23 00:45 108-67-80.50 1
Vinyl chloride ND ug/L 04/05/23 00:45 75-01-41.0 1
m&p-Xylene ND ug/L 04/05/23 00:45 179601-23-11.0 1
o-Xylene ND ug/L 04/05/23 00:45 95-47-60.50 1
Surrogates
1,2-Dichloroethane-d4 (S)90 %04/05/23 00:45 17060-07-070-130 1
4-Bromofluorobenzene (S)97 %04/05/23 00:45 460-00-470-130 1
Toluene-d8 (S)104 %04/05/23 00:45 2037-26-570-130 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/12/2023 01:13 PM
Pace Analytical Services, LLC
2225 Riverside Dr.
Asheville, NC 28804
[phone]
Page 29 of 64