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Home My WebLink About3402_Forsyth_HanesMillRoad_MSWLF_14DayNotification_FID1323587_20190628G GOLDER June 26, 2019 Ms. Jaclynne Drummond, Hydrogeologist North Carolina Department of Environmental Quality Division of Waste Management - Solid Waste Section 2090 US Highway 70 Swannanoa, North Carolina 28778 828-296-4706 RE: 14-DAY NOTIFICATION FOR COBALT, THALLIUM, AND VANADIUM FIRST SEMI-ANNUAL WATER QUALITY MONITORING EVENT OF 2019 HANES MILL ROAD LANDFILL, PERMIT NO. 34-02 WINSTON-SALEM, NORTH CAROLINA Dear Jackie, Project No. 0939668719 On behalf of Winston-Salem/Forsyth County City/County Utilities Commission (CCUC), Golder Associates NC, Inc. (Golder) is submitting this 14-Day Notification as required by North Carolina Solid Waste Management Regulation (NCSWMR) 15A North Carolina Administrative Code (NCAC) 13B .1633(c)(1). The 14-Day Notification of Groundwater Protection Standard Exceedance(s) form is included as Attachment 1. Tables 1 through 4 (shown below) summarize the NC Appendix I constituents that were detected at concentrations above their respective NC 2L Groundwater Standards or Interim Maximum Allowable Concentrations (IMACs) during the first semi-annual water quality monitoring event of 2019 conducted at the closed unlined landfill, the closed Subtitle D landfill, and the active Subtitle D landfill at the above -referenced facility between March 4 - 7, 2019. Note that the concentrations presented below are estimated below their laboratory practical quantitation limits (PQLs). Per the NC 2L Rules, no further action is warranted for the estimated concentrations. The laboratory certificates -of -analyses are submitted under separate cover. It is noted that the Closed Unlined Landfill is in corrective action for volatile organic compounds (VOCs); therefore, no notifications for groundwater standard exceedances for NC Appendix I VOCs are required for this facility. Also, no notifications for groundwater standard exceedances for NC Appendix I inorganic constituents reported in previous 14-day notifications. Golder Associates NC, Inc. 5B Oak Branch Drive, Greensboro, North Carolina, USA 27407 Engineering Lic. No. C-2862/Geology Lic. No. C-399 Golder Associates NC, Inc. is a licensed user of the Golder trademark, and an associated operating entity. T: +1 336 852-4903 F: +1 336 852-4904 Golder and the G logo are trademarks of Golder Associates Corporation. golder.com Ms. Jaclynne Drummond, Hydrogeologist Project No. 0939668719 North Carolina Department of Environmental Quality June 26, 2019 Table 1: 14-Day Notifications for the Closed Unlined Landfill Notes: ug/L = micrograms per liter J = estimated concentration above laboratory detection limit, but below the laboratory practical quantitation limit PQL = laboratory practical quantitation limit BG = background well Table 2: 14-Day Notification for the Closed Subtitle D Landfill Constituent Location Result (ug/L) PQL (ug/L) NC21L or IMAC 4 (ug/L) Table 3: 14-Day Notification for the Active Subtitle D Landfill Constituent V rlt (ug/L) PQL (ug/L) NC2L or IMAC (ug/L) Above -standard concentrations of barium and cobalt in samples from downgradient monitoring wells at the closed unlined landfill, chromium and cobalt in samples from downgradient monitoring wells at the closed Subtitle D landfill, and cobalt in samples from downgradient wells at the active Subtitle D landfill metals were addressed in the May 21, 2018, Response to Alternate Source Demonstration - Request for Additional Information, prepared by Golder. Based on a follow up letter from the NC DEQ dated June 8, 2018, two additional background wells (MW-23 and MW-24) were installed in November 2018 to collect additional analytical data over a two-year period to evaluate background concentrations of inorganic constituents at the closed unlined landfill, closed Subtitle D landfill, and the active Subtitle D landfill. Further, above -standard concentrations of cobalt, thallium, and vanadium have been noted historically at upgradient monitoring wells, further supporting that concentrations are naturally occurring. Additional analytical data are being collected for thallium and vanadium in addition to barium, cobalt, and chromium over the two-year evaluation period to establish updated background concentrations. The CCUC will continue monitoring the uppermost aquifer beneath the closed unlined landfill in accordance with the requirements of the Assessment Monitoring Program as outlined in Title 15A NCAC 13B .1634 and will continue monitoring the uppermost aquifer beneath the closed and active Subtitle D landfills in accordance with (4110 GOLDER Ms. Jaclynne Drummond, Hydrogeologist North Carolina Department of Environmental Quality Project No. 0939668719 June 26. 2019 the requirements of the Detection Monitoring Program as outlined in Title 15A NCAC 13B .1633. A complete semi-annual report is being submitted under separate cover. The next compliance monitoring event for this facility is scheduled for September 2019. If you have any questions, please contact the undersigned at 336 852- 4903. Sincerely, Golder Associates NC, Inc. David "Dusty" Y. Reedy II, PG Rachel P. Kirkman, PG Senior Hydrogeologist Associate and Senior Consultant CC: Adam Rickett, Senior Project Supervisor, Winston-Salem/Forsyth City/County Utilities Commission, 325 Hanes Mill Road, Winston-Salem, NC 27105. 336-661-4900. adamr@cityofws.org. Jan McHargue, PE, Assistant Utilities Director / Solid Waste, Winston- Salem/Forsyth City/County Utilities Commission, PO Box 2511, Winston- Salem, NC 27102. 336-747-7310. janm@cityofws.org. Mike Plummer, PE, HDR, 440 South Church Street, 10th Floor, Charlotte, NC 28202, 704 338 6719. Michael. Plummer@hdrinc.com. (electronic copy) Attachments: Attachment 1 — 14-Day Notification of Groundwater Protection Standard Exceedance Form g:\projects\winston-salem-Forsyth county\0939668718\phase 200, 201, 202, 203\200 deliv\252 final issued\notification\0939668718-002-1-rev0- notif cation.docx 6 GOLDER 3 NC DEQ 14-Day Notification of Groundwater Division of Waste Management - Solid Waste Protection Standard Exceedance(s) per rule: 15A NCAC 138.1633(c)(1) Notice: This form and any information attached to it are 'Public Records" as defined in NC General Statute 132-1. As such, these documents are available for inspection and examination by any person upon request (NC General Statute 132-6). Instructions: Prepare one form for each individually monitored unit. Please type or print legibly. Attach a notification table with values that attain or exceed applicable groundwater protection standards. Send the original signed and sealed form, any tables, and Electronic Data Deliverable to: Compliance Unit, NCDEQ-DWM, Solid Waste Section, 1646 Mail Service Center, Raleigh, NC 27699-1646. Solid Waste Monitoring Data Submittal Information Name of entity submitting data (laboratory, consultant, facility owner): Golder Associates NC, Inc. on behalf of the Winston-Salem/Forsyth County City/County Utilities Commission Contact for questions about data formatting. Include data preparer's name, telephone number and E-mail address: Name: David Y. Reedy II, PG E-mail: dreedy@golder.com Phone: 336-852-4903 Actual sampling dates (e.g., Facility name: Facility Address: Facility Permit # October 20-24, 2006) Hanes Mill Road Landfill 325 Hanes Mill Road 34-02 March 4-7, 2019 Winston-Salem, NC 27105 Environmental Status: (Check all that apply) ❑ Initial/Background Monitoring �X Detection Monitoring ❑X Assessment Monitoring ❑X Corrective Action Additional Information: ❑X A notification of values exceeding a groundwater protection standard as defined in 15A NCAC 13B .1634(g)(h) is attached. It includes a list of groundwater monitoring points, dates, analytical values, NC 2L groundwater standard, NC Solid Waste GWPS and preliminary analysis of the cause and significance of any concentration. ❑ A re -sampling event was conducted to confirm the exceedances. ❑ Alternate Source Demonstration(s) have been approved for the following constituents with report date: Certification To the best of my knowledge, the information reported and statements made on this data submittal and attachments are true and correct. Furthermore, I have attached complete notification of any sampling values meeting or exceeding groundwater standards or explosive gas levels, and a preliminary analysis of the cause and significance of concentrations exceeding groundwater standards. I am aware that there are significant penalties for making any false statement, representation, or certification including the possibility of a fine and imprisonment. David Y. Reedy II, PG Senior Hydrogeologist 336-852-4903 Facility R tive Name Title (Area Code) Telephone Number Affix INC Licensed/Professional Geologist or Professional a G - ZG iS Engineer Seal Signature ` Date 5090/981 Golder Associates NC, Inc., 5B Oak Branch Drive, Greensboro. NC 27407 Facility Representative Address C C-2862 'N3 NC PG/PE Firm License Number (if applicable effective May 1, 2009) 2 Revised 6/2016 v*91