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Home My WebLink AboutNC0005363_Correction_20181104ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Interim Director NORTH CAROLINA Environmental Quality December 4, 2018 Mr. Paul Draovitch, Senior Vice President Environmental, Health and Safety Duke Energy Carolinas, LLC Mail Code EC13K P.O. Box 1006 Charlotte, North Carolina 28201-1006 Subject: Error Correction Letter Permit No. NC0005363 Weatherspoon Steam Electric Plant Robeson County Facility Class I Dear Mr. Draovitch: On August 3, 2018, the Division of Water Resources issued a Permit Renewal (NPDES permit No. NC0005363) for Weatherspoon Steam Electric Plant. It has been brought to our attention that the Permit incorrectly identifies DEQ Regional Office on page 6. Therefore, the Division made a correction to the appropriate page in the Permit. Please insert the enclosed corrected sheet and discard the old sheet. This permit modification becomes effective on the effective date of the permit. All other terms and conditions in the original permit remain unchanged and in full effect. These modifications are issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended). If any parts, measurement frequencies or sampling requirements contained in this modification are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must Not Ih Qrta_tta lit pr lrtlttkl of Efl-Vi( full ftlal Quality E Dr:fitOlt of Watca Resources 512 Not tit salisbuiv Street I I6TTMall Scvocc Cunler I Raklot Not tit Curohna 2709-1611 1 919.707. ;6UI be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer 11666, Raleigh, North Carolina 27604. Unless such demand is made, this decision shall be final and binding. If you have any questions concerning this permit, please contact Sergei Chernikov at telephone number (919) 707-3606. Sincerely, Linda Culpepper, Director, Division of Water Resources cc: Central Files NPDES files Fayetteville Regional Office/Water Quality e-copy: EPA WSS/Aquatic Toxicology Unit WSS/Ecosystems Branch/Monitoring Coalition Coordinator Page 2 of 2 Permit NC0005363 A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Emergency Outfal1003- Cooling Pond) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of this permit and lasting until expiration, the permittee is authorized to discharge' from Outfall 003 under specified conditions. Such discharges shall be limited and monitored by the permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS' MONITORING REQUIREMENTS2 Monthly Average Daily Maximum Measurement Frequency' Sample Type Sample Location' Flow, MGD Waived Estimate Effluent Temperature, °C Waived Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Waived Grab Effluent Total Dissolved Solids, mg/L Waived Grab Effluent pH 6.0 < H <_ 9.0 Waived Grab Effluent Turbidity NTU Waived Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Waived Grab Effluent Hardness —Total as [CaC031, mg/L Waived Grab Effluent, Upstream Chlorides, mg/L Waived Grab Effluent Sulfates, mg/L Waived Grab Effluent Total Kjeldahl Nitrogen (TKN), mg/L Waived Grab Effluent Nitrite/Nitrate Nitrogen (NO2-N + NO3-N), mg/L Waived Grab Effluent Total Nitrogen (TN), mg/L TN = (NO2 + NO3) + TKN, mg/L Waived Calculated Effluent Total Phosphorus, mg/L Waived Grab Effluent Total Arsenic 2.8 mg/L 6.0 mg/L Waived Grab Effluent Total Cadmium, µg/L , Waived Grab Effluent Total Chromium, µg/L Waived Grab Effluent Total Copper, µg/L Waived Grab Effluent Total Lead, µg/L Waived Grab Effluent Total Selenium, µg/L Waived Grab Effluent Total Zinc, µg/L Waived Grab Effluent Total Thallium, µg/L Waived Grab Effluent Total Mercury, ng/L Waived Grab Effluent Naphthalene, g/L Waived Grab Effluent Total Phenols, mg/L Waived Grab Effluent Acute Toxicity Waived Grab Effluent Notes: 1. This discharge is permitted only in cases caused by extreme rainfall (100-year 24-hour rainfall); where unavoidable to prevent loss of life, severe property damage, or damage to the cooling pond structure. In the event a discharge occurs, the permittee shall inform the North Carolina Division of Water Resources by telephone within 24 hours after the discharge event. The permittee shall also provide the Division with the following written information within ten (10) days of the discharge: a) a description and cause of the discharge; b) the period of discharge, including approximate dates and times; c) the anticipated period the discharge is expected to continue; d) and the steps being taken to reduce, eliminate, and prevent recurrence of the discharge. The Permittee shall take all reasonable steps to minimize any adverse impact to receiving waters from the discharge. 2. Effluent limitations and monitoring requirements are waived due to unsafe conditions associated with sampling during an extreme rainfall event. There shall be no discharge of floating solids or foam visible in other than trace amounts. Page 5of14 Permit NC0005363 A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Internal Outfall 001A-Ash Pond Water) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of this permit and lasting until expiration, the permittee is authorized to discharge effluent through Internal Outfall 001A (decanting - the free water above the settled ash layer that does not involve mechanical disturbance of the ash /dewatering-removing the interstitial water/ normal operations — Water leaking/trickling/flowing from ash pond to cooling pond) Such discharges shall be limited and monitored' by the permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location,' Flow, MGD 2.0 Daily Pump Logs or estimate Effluent Total Suspended Solids3 30.0 mg/L 100.0 mg/L Weekly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent TDS, mg/L Weekly Grab Effluent H4 6.0 < H < 9.0 Weekly Grab Effluent Hardness —Total as [CaC031, mg/L Weekly Grab Effluent Chlorides, mg/L Weekly Grab Effluent Sulfates, mg/L Weekly Grab Effluent Total Arsenic, g/L Weekly Grab Effluent Total Cadmium, µg/L Weekly Grab Effluent Total Chromium, µg/L Weekly Grab Effluent Total Copper, µg/L Weekly Grab Effluent Total Lead, µg/L Weekly Grab Effluent Total Selenium, µg/L Weekly Grab Effluent Total Zinc, µg/L Weekly Grab Effluent Total Thallium, g/L Weekly Grab Effluent Total MercW , ng/L Weekly Grab Effluent Notes: 1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A. (13). 2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with any other waste stream. 3. The facility shall continuously monitor TSS concentrations when the dewatering process commences (and the pump is operating) and the dewatering pump shall be shut off automatically when one-half of the Daily Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue if interruption might result in a dam failure or damage. 4. The facility shall continuously monitor pH when the dewatering process commences (and the pump is operating) and the dewatering pump shall be shut off automatically when 15 minutes running average pH falls below 6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue if interruption might result in a dam failure or damage. 5. The facility shall use EPA method 1631E. There shall be no discharge of floating solids or visible foam in other than trace amounts. The facility shall notify via e-mail DWR Complex NPDES Permitting Unit and DWR Fayetteville Regional Office seven (7) calendar days prior to the commencement of the dewatering. When the facility commences the ash pond dewatering, the facility shall treat the wastewater discharged from the ash pond using physical -chemical treatment, if necessary, to assure state Water Quality Standards are not contravened in the receiving stream. Duke Energy shall notify DWR NPDES Complex Permitting and DWR Fayetteville Regional Office, in writing, within seven (7) calendar days of installing additional physical -chemical treatment at this Outfall. The facility shall use a floating pump suction pipe with free water skimmed from the basin surface using an adjustable weir. Page 6of14