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Home My WebLink AboutWQ0029804_Annual Report_20240702ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director NORTH CAROLINA Environmental Quality July 2, 2024 Delivered electronically via email to: courtneyd(a)_cityofws.org Ms. Courtney Driver — Utilities Director Winston-Salem/Forsyth County Utilities Commission P.O. Box 2511 Winston Salem, North Carolina Dear Ms. Driver: On June 21, 2024, Division of Water Resources staff Caitlin Williams completed a review of the 2023 residuals annual report. This review mostly reflects compliance with the subject permit. The following item of concern was noted: A. Staff determined that the Sodium Adsorption Rate (SAR) calculations provided were incorrect. A conversion factor was calculated incorrectly, resulting in all reported SAR values being incorrect. Mrs. Williams provided the correct calculations. Staff have no concern for the quality of residuals distributed in the 2023 calendar year. Moving forward, use the correct calculation to determine SAR. Please refer to the enclosed inspection report for additional comments and observations. If you have any questions, please contact Caitlin Williams at the letterhead address and phone number, or by email at caitlin.williams(a)-deg.nc.gov. Sincerely, Docu Signed by, OD2D3CE3F161456... Jennifer F. Graznak, Assistant Regional Supervisor Water Quality Regional Operations Section Division of Water Resources, NCDEQ — WSRO Enc: Inspection Report Cc: Forsyth County Environmental Health (electronic copy) Mark Solan, Utility Plant Supervisor (electronic copy) Keith Jones, Assistant Utility Plant Supervisor (electronic copy) Bonnie McKee, Utilities Plant Supervisor — Manson Meads Laboratory (electronic copy) D North Carolina Department of Environmental Quality I Division of Water Resources Winston-Salem Regional Office 1 450 W. Hanes Mill Rd, Suite 300 I Winston-Salem, North Carolina 27105 Moan caaouNn 336.776.9800 oep.m.m or em�nmen� Qualm Compliance Inspection Report Permit: WQ0029804 Effective: 05/01/20 Expiration: 06/30/26 Owner: City of Winston-Salem SOC: Effective: Expiration: Facility: City of Winston-Salem DCAR County: Forsyth 2801 Griffith Rd Region: Winston-Salem Winston Salem NC 27103 Contact Person: Bruce Michael Casey Title: Utilities Plant Supervisor Phone: 336-397-7662 Directions to Facility: System Classifications: Primary ORC: Secondary ORC(s): On -Site Representative(s): Related Permits: Inspection Date: 06/21/2024 Entry Time 12:OOPM DocuSigned by: Primary Inspector: Caitlin illi m �au�itn, �)i�,iaw�S tor Secondary Inspec(s): 8B834968199D49D... Certification: Reason for Inspection: Routine Permit Inspection Type: Distribution of Residual Solids (503) Facility Status: Compliant ❑ Not Compliant Question Areas: Miscellaneous Questions Record Keeping Pathogen and Vector Attraction (See attachment summary) Phone: Exit Time: 05:OOPM Phone: 336-776-9699 Inspection Type: Annual Report Review Sampling Page 1 of 4 Permit: WQ0029804 Owner - Facility: City of Winston-Salem Inspection Date: 06/21/2024 Inspection Type: Annual Report Review Reason for Visit: Routine Inspection Summary: On June 21, 2024, Division of Water Resources staff Caitlin Williams completed a review of the 2023 residuals annual report. This review mostly reflects compliance with the subject permit. The following item of concern was noted: A. Staff determined that the Sodium Adsorption Rate (SAR) calculations provided were incorrect. A conversion factor was calculated incorrectly, resulting in all reported SAR values being incorrect. Mrs. Williams provided the correct calculations. Staff have no concern for the quality of residuals distributed in the 2023 calendar year. Moving forward, use the correct calculation to determine SAR. Other observations: • 1,486.46 tons of cake biosolids were landfilled. • The dryer experienced a catastrophic failure in November, causing no pellets to be produced in November and December. Pellets were also not produced in September. • 4,549.12 tons of pellets were distributed in the 2023 calendar year. • Nutrient and metals, and fecal samples were collected in January, February, March, April, May, June, July, August, and October. A TCLP sample was collected in August. • pH and TSS samples are analyzed in house. All other samples are sent to NC certified laboratories. The TS sample collected is diluted for NH3 and TKN analysis, which are reported in mg/L. The dilution factor and %TS are used to calculate NH3 and TKN in mg/kg. • The incorrect minimum value was reported for the June fecal sample event. All values were <1,000 MPN/g. • The May TS sample was not collected on the same day as the dilution factor and NH3 and TKN. TS was collected on 5/15/23 and DF and nutrients were collected on 5/16/23. Page 2 of 4 Permit: WQ0029804 Owner - Facility: City of Winston-Salem Inspection Date: 06/21/2024 Inspection Type: Annual Report Review Reason for Visit: Routine Type Yes No NA NE Land Application ❑ Distribution and Marketing Record Keeping Yes No NA NE Is GW monitoring being conducted, if required? ❑ ❑ 0 ❑ Are GW samples from all MWs sampled for all required parameters? ❑ ❑ 0 ❑ Are there any GW quality violations? ❑ ❑ 0 ❑ Is GW-59A certification form completed for facility? ❑ ❑ 0 ❑ Is a copy of current permit on -site? ❑ ❑ 0 ❑ Are current metals and nutrient analysis available? 0 ❑ ❑ ❑ Are nutrient and metal loading calculating most limiting parameters? 0 ❑ ❑ ❑ a. TCLP analysis? 0 ❑ ❑ ❑ b. SSFA (Standard Soil Fertility Analysis)? ❑ ❑ 0 ❑ Are PAN balances being maintained? ❑ ❑ 0 ❑ Are PAN balances within permit limits? ❑ ❑ 0 ❑ Has land application equipment been calibrated? ❑ ❑ 0 ❑ Are there pH records for alkaline stabilization? ❑ ❑ 0 ❑ Are there pH records for the land application site? ❑ ❑ 0 ❑ Are nutrient/crop removal practices in place? ❑ ❑ 0 ❑ Do lab sheets support data reported on Residual Analysis Summary? 0 ❑ ❑ ❑ Are hauling records available? 0 ❑ ❑ ❑ Are hauling records maintained and up-to-date? 0 ❑ ❑ ❑ # Has permittee been free of public complaints in last 12 months? 0 ❑ ❑ ❑ Has application occurred during Seasonal Restriction window? ❑ ❑ 0 ❑ Comment: Pathogen and Vector Attraction Yes No NA NE a. Fecal coliform SM 9221 E (Class A or B) 0 ❑ ❑ ❑ Class A, all test must be <1000 MPN/dry gram Geometric mean of 7 samples per monitoring period for class B<2.0*10E6 CFU/dry gram ❑ Fecal coliform SM 9222 D (Class B only) ❑ ❑ ❑ ❑ Geometric mean of 7 samples per monitoring period for class B<2.0*10E6 CFU/dry gram ❑ b. pH records for alkaline stabilization (Class A) ❑ ❑ ❑ ❑ c. pH records for alkaline stabilization (Class B) ❑ ❑ ❑ ❑ Temperature corrected ❑ d. Salmonella (Class A, all test must be < 3MPN/4 gram day) ❑ ❑ ❑ ❑ Page 3 of 4 Permit: WQ0029804 Owner - Facility: City of Winston-Salem Inspection Date: 06/21/2024 Inspection Type: Annual Report Review e. Time/Temp on: Digester (MCRT) Compost Class A lime stabilization f. Volatile Solids Calculations g. Bench -top Aerobic/Anaerobic digestion results Comment: Sampling Describe sampling: Is sampling adequate? Is sampling representative? Comment: Reason for Visit: Routine ■❑❑❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE Page 4 of 4