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Home My WebLink AboutWQ0020409_Application_20201013Thornburg, Nathaniel From: Fentress, Emily <Emily.Fentress@raleighnc.gov> Sent: Tuesday, October 13, 2020 8:32 AM To: Thornburg, Nathaniel; Vinson, Scott; Kiviniemi, John; Dalton, Marla Subject: [External] LCRRF WQ0020409 Reduced Monitoring Request Attachments: LCRRF Permit NCO079316 Reduced Monitoring Requirements.pdf; LCRRF WQ0020409 Attachment A.pdf External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov Nathaniel, Our Little Creek NPDES permit renewal (NC0079316) has been approved with an effective date of 11/1/2020. We have requested reduced monitoring frequencies for this permit consistent with the protocols for exceptionally performing treatment plants. We would like to request associated modifications to our LCRRF reclaimed water permit (WQ0020409) for monitoring frequencies for BOD, TSS, fecal coliform and total ammonia nitrogen (as N) to become effective concurrently with the NCO079316 permit renewal. I have attached the limitations and monitoring requirements for both of the permits referenced in this email. Please let me know if you have questions or require additional information. Thank you, Eve iLy Fe yXrew Utilities Coordinator City of Raleigh Public Utilities I Raleigh Water (p) (919) 996-3680 (m) (919) 723-0959 raleiphnc. p,ov DocuSign Envelope ID: A55E5E60-DFlA-4933-AA95-8CF96DlE3AAF Permit NCO079316 PART A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq„ 02B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] Beginning on the effective date of this permit and lasting until permit expiration, the Permittee is authorized to discharge treated wastewater from outfall 001. Such discharges shall be limited and monitored' by the Perrnittee as specified below: EFFLUENT LIMITATIONS MONITORING REQUIREMENTS. PARAMETER parameter code Monthly Weekly Daily Measurement Sample .: Sample Average Average Maximum Frequency Type Locationx Flow 50050 2.20 MGD Continuous Recording I or E Total Monthly Flow, 82220 MG/month Monitor and Report epor Monthly Recorded or Calculated I or E BOD5 (20°C) 3 C0310 (April 1 - October 31) 5.0 mg/L 7.5 mg/L 2/Week4 Composite I and E BODs (20-C) 3 C0310 (November 1 - March 31) 10.0 mg/L 15.0 mg/L 2/Week' Composite I and E Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/Week4 Composite I and E Ammonia (NH3 as N) C0610 (April 1 - October 31) 10 mg/L 3,0 mg/L 2/Week4 Composite E Ammonia (NH3 as N) C0610 (November 1- March 31) 2.0 mg/L 6.0 mg/L 2/Week' Composite E Dissolved Oxygen 00300 Daily Average > 5.0 mg/L Daily Grab E Fecal Coliform 31616 (geometric mean) 200/100 mL 400/10 1 mL 2/Week4 Grab E Temperature, °C 00010 Monitor and Report Daily Grab pH 00400 Between 6.0 and 9.0 standard units Daily Grab EE TKN, mg/L 00625 Monitor and Report Weekly Composite E NO3-N + NO2-N, mg/L 00630 Monitor and Report Weekly Composite E TN, mg/L 5 C0600 Monitor and Report Weekly Composite E TN Load 6 QM600 Monitor and Report (lb/mo) Monthly Calculated E QY600 26,600lb/year' Annually Calculated E Total Phosphorus C0665 1.0 mg/L (quarterly average) a Weekly Composite E Total Hardness [as 00900 CaC031, mg/L9 Monitor d Re anport Quarterly Composite E Chronic Toxicity1° TGP3B See Note 10 Quarterly Composite E Effluent Pollutant Scan /VC011 Monitor and Report Footnote 11 E Footnotes: 1, The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See Special Condition A.(9.). 2. Sample Locations: I - Influent, E - Effluent. See Special Condition A.(2.) of this permit for instream monitoring requirements. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. 2/Week sampling must occur on any two non-consecutive days during the calendar week. 5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 6. TN load is the mass quantity of total nitrogen discharged in a given week. See condition A.(3.). 7. Compliance with this limit shall be determined in accordance with condition A.(4.). (Footnotes continued on next page.) Page 3 of 13 ATTACHMENT A - LEMTATIONS AND MONITORING REQUIREMENTS Permit Number: WQ0020409 PPI 001— Reclaimed Water Generation System Effluent Version: 2.0 EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS PCs Code Parameter Description p Units of Measure Monthly Average Monthly Geometric Mean Daily Minimum Daily Maximum Measurement Sample Frequency Type 00310 BOD, 5-Day (20 °C) mg/L 10 15 5 x Week Composite 31616 Coliform, Fecal MF, WC Broth, 44.5 C #Il QOmL 14 25 5 x Week' Cxrab 00610 Nitrogen, Ammonia Total (as N) mg/L 4 6 5 x Week' Composite 00530 Solids, Tonal Suspended mg/L 5 10 5 x Week' Composite 00076 Turbidity, HCH Turbidimeter NTU 10 Continuous Recorder L Please note That the monitoring requirements (i.e., measurement frequency and sample type) have been aligned with those requirements in Permit No. NC0079316. Accordingly, the Permittee may report the same data for parameters BODs (00310), Fecal Colifotm (31616), Ammonia (00610) and TSS (00530) as reported for Permit No. NC0079316 (i.e., no additional monitoring). PPI 002 — Bulk Distributed Reclaimed Water EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS PCs Units of Monthly Measurement Sample Code Parameter Description Measure Monthly Total Geometric Mean Daily Minimum Daily Maximum Frequency Type WQ01 Flow, Reclaimed Water Distributed Gallons Monthly Recorder PPI 003 — Distributed Reclaimed Water EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS PCs Code Parameter Descri tion p Units of Measure Monthly Average Monthly Geometric Mean Monthly Total Daily Maximum Measurement Sample p FrequencyT Type 50060 Chlorine, Total Residual mg/L Monthly Grab 3I616 Coliform Fecal MF, WC Broth, 44.5 C MPN or #/100mL Monthly Grab WQO1 Flow, Reclaimed Water Distributed Gallons Monthly Recorder WQ0020409 Version 2.0 Attachment A Page 1 of 1