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Home My WebLink AboutWI0500204_Correspondence_20210715ROY COOPER Governor ELIZABETH S. BISER Secretory S. DANIEL SMITH NORTH CAROLINA Director Environmental Quality July 15, 2021 Hooman Troy Ghashghaei 3011 Buckingham Way Apex, NC 27502 Re: Geothermal Permit Renewal Inspection- Groundwater Evaluation (GWE) 3011 Buckingham Way Apex, NC -Wake County Permit #WI0500204 Dear Mr. Ghashghaei: A groundwater sample was collected from your geothermal well system and submitted to the Division of Water Resources Water Sciences Laboratory for analysis on April 1, 2021. Samples were collected at the influent (sample #AC83032) and effluent (sample #AC83031) ports. The sample results were previously mailed to you. Attached is the Groundwater Evaluation completed by the Division of Water Resources for the samples AC83031 and AC83032. If you have any questions regarding the evaluation, please contact me at (919) 791-4200. c: Laserfiche Wake County Health Department EE MJ!(FH Sincerely, Eric Rice, Hydrogeologist Division of Water Resources Water Quality Regional Operations Raleigh Regional Office North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office 13800 Barrett Drive I Raleigh, North Carolina 27609 919,791.4200 Groundwater Evaluation (GWE) .11.10E ...la ...�..��.. Division of Water Resources PRIVATE WELL INFORMATION Wake County Raleigh DWR Region W10500204 Address AC83031, AC83032 Sample ID # 4/1/2021 Sample Date TEST RESULTS SUMMARY The test results show that the concentration of sulfate EXCEEDS the North Carolina 15A NCAC 02L groundwater standard and the U.S. EPA's Drinking Water Health Advisory for sulfate. U.S. EPA's Drinking Water Health Advisory for sulfate in drinking water is 500 mg/L. Exceedances of this value may result in mild laxative effects, especially in water with high concentrations of total dissolved solids. People can develop a tolerance for high concentrations of sulfate in drinking water. U.S. EPA advises against using water containing high levels of sulfate or total dissolved solids in the preparation of powdered infant formula or nutritional supplements. The test results for the other detected substances listed below show that there were NO EXCEEDANCES of the North Carolina 15A NCAC 02L groundwater standards or federal drinking water guidelines and advisories. However, the sodium level from the samples may be of concern to persons on a restricted sodium intake diet. Based on the information from these well water samples, this well is a suitable source of drinking water. If the well owner has concerns over the sulfate levels shown in these samples, this well should receive additional testing to monitor substance levels over time and the well owner can contact the Raleigh Regional Office staff to discuss site -specific options. TEST RESULTS The influent groundwater sample (AC83032) collected at the address listed above was analyzed for various metals and nutrients. The following were detected: Detected Substances Laboratory Result NC Groundwater Quality Standard Aluminum 190 µg/L Not Established Calcium 530 mg/L Not Established Chloride 5.3 mg/L 250 mg/L Copper 10 µg/L 1,000 µg/L Fluoride 1 mg/L 2 mg/L Page 1 of 3 CV) Groundwater Evaluation (GWE) M�.a....��.� Division of Water Resources Iron 160 µg/L 300 µg/L Lead 2.1 µg/L 15 µg/L Magnesium 5.9 mg/L Not Established Manganese 50 µg/L 50 µg/L Nickel 3.3 µg/L 100 µg/L Potassium 1.3 mg/L Not Established Sodium 27 mg/L Not Established Sulfate 1,300 mg/L 250 mg/L Zinc 90 µg/L 1,000 µg/L µgfL = micrograms per liter, or parts per billion; mg/L = milligrams per liter, or parts per million The effluent groundwater sample (AC83031) collected at the address listed above was analyzed for various metals and nutrients. The following were detected: Detected Substances Laboratory Result NC Groundwater Quality Standard Aluminum 190 µg/L Not Established Calcium 540 mg/L Not Established Chloride 5.1 mg/L 250 Copper 9.7 µg/L1,000 i/Lm Fluoride 1.1 mg/L 2 mg/L Iron 61 µg/L 300 µg/L Magnesium 5.9 mg/L Not Established Manganese 36 µg/L 50 µg/L Nickel 3.8 µg/L 100 µg/L Potassium 1.3 mg/L Not Established Sodium 27 mg/L Not Established Sulfate 1,300 mg:L 250 mg/L Zinc 140 µg/L 1,000 µg/L µg/L = micrograms per liter, or parts per billion; mg/L = milligrams per liter, or parts per million QUESTIONS OR CONCERNS? Raleigh Regional Office contact information: htt s:rideq,nc_gpvicontact/regional-offices/raleith; phone: 919-791-4200 For further information on North Carolina groundwater standards, please contact the Groundwater Quality Standards Coordinator with the Division of Water Resources, NC Department of Environmental Quality, at 919-707-9022. Page 2 of 3 r ' 4 Groundwater Evaluation (GWE) Division of Water Resources For public health related information, please contact the Private Well and Health Program with the Division of Public Health, NC Department of Health and Human Services, at 919-707-5900. For additional information on U.S. EPA's Drinking Water Health Advisories for Sulfate, please visit: epa. o /sites/nroducticm 20I4-`!9 documents/support cc 1 sulfate healtheffects_rdf Page 3 of 3