The URL can be used to link to this page

Home My WebLink AboutNCG120111_2021 DMR_20211130CDM Smith 5400 Glenwood Avenue, Suite 400 Raleigh, North Carolina 27612 tel: 919-787-5620 fax: 919-781-5730 November 30, 2021 North Carolina Department of Environmental Quality Division of Energy, Mineral, and Land Resources Washington Regional Office 943 Washington Square Mall Washington, North Carolina 27889 Subject: Quarterly Discharge Monitoring Report Monitoring Period: July I — September 30, 2021 Dare County C&D Landfill Certificate of Coverage Number - NCG120111 To the NPDES Industrial Program: CDM Smith Inc., on behalf of Dare County (County), is submitting one copy of the Stormwater Discharge Monitoring Report for Outfalls I and 2. A copy of the discharge monitoring report has been uploaded to the eDMR system. Samples were collected on September 29, 2021, and analyzed for chemical oxygen demand (COD), fecal coliform, total suspended solids (TSS), and pH. During the September 2021 quarterly sampling event, samples collected from Outfall I had detections of COD, pH, and TSS below benchmark values. TSS and fecal coliform detections in Outfall 2 were also below benchmark values. Additionally, Outfall I had pH values within the limits of the permit. Samples collected from Outfall I had detections of fecal coliform (>2,420 MPN/100 ml) above the benchmark values and Outfall 2 samples exceeded benchmark values for COD (156 mg/L) and pH (5.3). This is the first monitoring period where fecal coliform in Outfall I exceeded the benchmark value therefore the County implemented a Tier I response. A stormwater management inspection determined the cause of the fecal coliform exceeclance is likely due to the presence of wildlife. Outfall 2 began monthly sampling per the Tier 2 response requirements in July 2021 due to COD and pH exceeclances. CDM Smith believes agriculture activities in the area are a contributing factor to the COD and pH detection as Outfall 2 collects stormwater from adjacent properties. Additional samples (Outfall 4) were collected upstream of Outfall 2 along US Highway 264 to demonstrate the exceeclances are not due to the landfill. COD (143 mg/L) and pH (5.6) values in the upstream sample exceeded the benchmark values and were similar to the results in Outfall 2 therefore we are requesting discontinuation of Tier 2 sampling in Outfall 2. The County will continue monthly sampling in Outfall 2 until three consecutive events show the parameters are below the benchmark values or reprieve from sampling is granted as requested above. ro WATER+ ENVIRONMENT+ TRANSPORTATION + ENERGY+ FACILITIES CDM Smith Division of Water Resources November 30, 2021 Page 2 The County will continue to maintain a record of the Tier I and 2 responses and monitoring results at the landfill. If you have any questions or require further explanation, do not hesitate to call me at (919) 325-3532. Sincerely, Aaron M. Weispfenning, P.E. CDIM Smith Inc. cc: Shanna Fulmer, Dare County NICDEQ Division of Energy, Mineral and Land Resources Stormwater Discharge Monitoring Report (DMR) Form for NCG120000 Landfills Click here for instructions Complete, sign, scan and submit the DMR via the Stormwater NPDES Permit Data Monitoring Report (DMR1 Uipload form within 30 days of receiving sampling results. Mail the original, signed hard copy of the DMR to the appropriate DEMLR Regional Office. Certificate of Coverage No. NCG12 0111 Person Collecting Samples- Jonathan Deweese Facility Name: Dare County C&D Landfill Laboratory Name: Environmental Chemists, Inc. Facility County: Dare Laboratory Cert. No.: 628 Discharge during this period:E] Yes [] No (if no, skip to signature and date) Has your facility implemented mandatory Tier response actions this sample period for any benchmark exceeclances? Byes [YNo If so, which Tier (1, 11, or 111)? Tier I A copy of this DMR has been uploaded electronically via https://edocs.deg.nc.gov/Forms/SW-DMR Des CyNo Date Uploaded: 11-30-21 Analytical Monitoring Requirements for Outfalls with Industrial Activities — Benchmarks in (Red) Parameter Parameter Outfall I Outfall 2 Outfall Outfall Outfall Code N/A Receiving Stream Class SA, HQW SA; HQW N/A Date Sample Collected MM/DD/YYYY 09/29/2021 09/29/2021 46529 24-Hour Rainfall in inches 0.3 0.3 C0530 TSS in mg/L (100 or 50*) 13.7 6.2 pH in standard units (6.0 — 9.0 FW, 00400 6.8 — 8.5 SW) 6.7 5.3 Chemical Oxygen Demand in mg/L 00340 (120) 90 156 31616 Fecal Coliform in # per 100 ml (1000) >2,420 138 Additional parameters for outfalls in drainage areas that use >55 gallons per month of new hydraulic oil on average 00552 Non -Polar Oil & Grease in mg/L (15) NA NA Estimated New Motor/Hydraulic Oil NCOIL Usage in gal/month NA NA * Outfalls to Outstanding Resource Waters (ORW), High Quality Waters (HQW), Trout Waters (Tr) and Primary Nursery Areas (PNA) have a benchmark TSS limit of 50 mg/L. All other water classifications have a benchmark of 100 mg/L. FW (Freshwater) SW (Saltwater) I Notes (optional): ReportIN Period or July I - September 30 "I certify by my signature below, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person :)r pers who manage the system, or those persons directly responsible for gathering the information, the information 0 submitted is, to the best my kn, wdedge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, incl igg the possibility of fiW and Oprisonment for knowing violations." '�Y - - Signature of Permitt Delegated shanna@darenc.gov Email Address L Date 252-475-5844 Phone Number Environmental Chemists, Inc. envirochem 6602 Windmill Way, Wilmington, NC 28405 6 910.392.0223 Lab 0 910.392.4424 Fax L 710 Bowsertown Road, Manteo, NC 27954 0 252.473.5702 Lab/Fax 255-A Wilmington Highway, Jacksonville, NC 28540 0 910.347.5843 Lab/Fax ANALYTICAL & CONSULTING CHEMISTS info@environmentalchemists.com Dare Co. Public Works Date of Report: Oct 06, 2021 Post Office Box 1000 Manteo Report #: Manteo NC 27954 Report #: 2021-17165 Attention: Customer ID: 11120018 Project ID: Lab ID Sample ID: M-3327 Collect Date/Time Matrix Sampled by 21-43166 Site: Dirt Pit 9/29/2021 11:55 AM Water Client Test Method Results Date Analyzed Residue Suspended (TSS) SM 2540 D-2015 6.5 mg/L 09/30/2021 Residue Settleable (SS) SM 2540 F-2015 <0.1 ml/L 09/29/2021 pH SM 4500 H B-2011 5.8 units 09/29/2021 Result estimated. Analyzed out of 15 minutes hold time. Lab ID Sample ID: Collect Date/Time Matrix Sampled by 21-43167 Site: Dirt Pit 9/29/2021 11:55 AM Water Client Test Method Results Date Analyzed Turbidity SM 2130 B-2011 9.4 NTU 09/30/2021 Lab ID Sample ID: M-3328 Collect Date/Time Matrix Sampled by 21-43168 Site: Landill 9/29/2021 11:30 AM Water Client Test Method Results Date Analyzed Fecal Coliform Idexx Colilert-1 8 >2420 MPN/100ml 09/29/2021 Residue Suspended (TSS) SM 2540 D-2015 13.7 mg/L 09/30/2021 pH SM 4500 H B-2011 6.7 units 09/29/2021 Result estimated. Analyzed out of 15 minutes hold time. Lab ID Sample ID: Collect Date/Time Matrix Sampled by 21-43169 Site: Landill 9/29/2021 11:30 AM Water Client Test Method Results Date Analyzed COD SM 5220 D-2011 90.0 mg/L 10/01/2021 Lab ID Sample ID: M-3329 Collect Date/Time Matrix Sampled by 21-43170 Site: Outfall 2 9/29/2021 11:42 AM Water Client Test Method Results Date Analyzed Fecal Coliform Idexx Colilert-18 138 MPN/100ml 09/29/2021 Residue Suspended (TSS) SM 2540 D-201 5 6.2 mg/L 09/30/2021 pH SM 4500 H B-2011 5.3 units 09/29/2021 Result estimated. Analyzed out of 15 minutes hold time. Report #:: 2021-17165 Page 1 of 2 F"0'0' -- 41 L envirochem 4 , (Sg- hbm..— ANALYTICAL & CONSULTING CHEMISTS Dare Co. Public Works Post Office Box 1000 Manteo Attention: Environmental Chemists, Inc. 6602 Windmill Way, Wilmington, NC 28405 a 910.392.0223 Lab 0 910.392.4424 Fax 710 Bowsertown Road, Manteo, NC 27954 0 252.473.5702 Lab/Fax 255-A Wilmington Highway, Jacksonville, NC 28540 0 910.347.5843 Lab/Fax info@environmentalchemists.com Date of Report: Oct 06, 2021 Manteo Report #: NC 27954 Report #: 2021-17165 Customer ID: 11120018 Project ID: Lab ID Sample ID: Collect Date/Time Matrix Sampled by 21-43171 Site: Outfall 2 9/29/2021 11:42 AM Water Client Test Method Results Date Analyzed COD SM 5220 D-2011 156 mg/L 10/01/2021 Comment: Reviewed by:W�A20L Report #:: 2021-17165 Page 2 of 2 r— 7 Environmental Chemists, Inc. '77 L envirochem 6602 Windmill Way, Wilmington, NC 28405 a 910.392.0223 Lab * 910.392.4424 Fax L -4 710 Bowsertown Road, Manteo, NC 27954 a 252.473.5702 Lab/Fax 255-A Wilmington Highway, Jacksonville, NC 28540 & 910.347.5843 Lab/Fax ANALYTICAL & CONSULTING CHEMISTS info@environmentalchemists.com Dare Go. Public Works Date of Report: Oct 06, 2021 Post Office Box 1000 Manteo Report#: 21 M-2025 Manteo NC 27954 Report #: 2021-17164 Attention: Customer ID: 11120018 Project ID: C&D Landfill Lab ID Sample ID: Collect Date/Time Matrix Sampled by 21-43164 Site: Ouffall 4 9/29/2021 11:51 AM Water Client Test Method Results Date Analyzed COD SM 5220 D-2011 143 mg/L 10/01/2021 Lab ID Sample ID: M-3330 Collect Date/Time Matrix Sampled by 21-43165 Site: Ouffall 4 9/29/2021 11:51 AM Water Client Test Method Results Date Analyzed Fecal Coliform Idexx Colilert-1 8 11 MPN/100ml 09/29/2021 Residue Suspended (TSS) SM 2540 D-2015 6.1 mg/L 09/30/2021 pH SM 4500 H B-2011 5.6 units 09/29/2021 Result estimated. Analyzed out of 15 minutes hold time. Comment: &aA)bReviewed by: Report #:: 2021-17164 Page 1 of I