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Home My WebLink AboutNC0004961_Special Order By Consent_20180425 DUKE `►. ENERGY® James Wells Vice President Environmental,Health&Safety- Programs and Environmental Sciences 526 South Church Street Mail Code EC13K Charlotte, NC 28202 (980)373-9646 April 25, 2018 Via Overnight Mail Corey Basinger Mooresville Regional Supervisor RECEIVED/DENR/DWR North Carolina Department of Environmental Quality Division of Water Resources APR 2 6 2018 Regional Water Quality Operations Section 601 East Center Avenue, Suite 301 Water Resources Mooresville, NC 28115 Permitting Section Bob Sledge North Carolina Department of Environmental Quality Water Quality Permitting Program Division of Water Resources 1617 Mail Service Center Raleigh, NC 27699-1617 Subject. Report Under Special Order by Consent - SOC No S16-005 Duke Energy Carolinas, LLC - Riverbend Steam Station NPDES Permit NC0004961 Dear Mr Basinger and Mr. Sledge. On behalf of Duke Energy Carolinas, LLC ("DEC"), I am submitting to you the Riverbend Steam Station Progress Report summarizing the work and activities undertaken with respect to closure of coal ash surface impoundments as required by the Riverbend Steam Station NPDES Permit NC0004961 Special Order by Consent ("SOC"), SOC No S16-005 Section 2. d. As required by the SOC, I certify 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 or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Mr. Corey Basinger and Mr. Bob Sledge April 25, 2018 Page 2 Please direct any questions concerning the Riverbend Steam Station NPDES Permit NC0004961 SOC No S16-005 to Brad Loveland at (704) 609-5637. Sin y, .17(ii James ells Vice P sident, Environmental, Health & Safety ProgiO s and Environmental Sciences Duke Energy CC• Richard Baker, Duke Energy Brad Loveland, Duke Energy Rick Massey, Duke Energy George Hamrick, Duke Energy Paul Draovitch, Duke Energy Matt Hanchey, Duke Energy NPDES PERMIT NC0004961 SPECIAL ORDER BY CONSENT EMC SOC WQ S16-005 QUARTERLY EXCAVATION PROGRESS REPORT RIVERBEND STEAM STATION APRIL 25, 2018 I. Background and Summary On November 10, 2016, Duke Energy Carolinas, LLC ("DEC") and the North Carolina Environmental Management Commission entered into Special Order by Consent—EMC SOC WQ S 16-005 ("SOC") applicable to the Riverbend Steam Station ("Riverbend"). This report is submitted in accordance with paragraph 2.d of the SOC. In compliance with Section 2.d., this report summarizes the work and activities undertaken with respect to closure of coal ash surface impoundments at Riverbend, including a status update for necessary permits. The quarterly reports are due no later than the last day of January, April,July, and October for the duration of the SOC. A. Riverbend Steam Station Closure Summary Riverbend is located off of Horseshoe Bend Beach Road near the town of Mt. Holly in Gaston County, North Carolina, on the south bank of the Catawba River. The site contains two ash basins, as well as the Dry Ash Stack and the Cinder Pit. As of April 2013, all of the coal- fired units were retired. As of March 31, 2018, approximately 4,180,840 tons of ash has been excavated from the site, representing 87% of the total estimated ash on site. The N ("CAMA")Carolina Coal Ash Management Act of 2014 ( CAMA") requires that ash from Riverbend's ash basins be excavated and relocated to a lined facility, with the ash basins closed by August 1, 2019. The initial Excavation Plan was submitted to the North Carolina Department of Environmental Quality ("NCDEQ") on November 13, 2014, detailing the first 12-18 months of projected ash basin excavation activities. Updated Excavation Plans, including the status of necessary permits, have been submitted annually since then. The Riverbend facility continues to excavate ash by rail to the Brickhaven Structural Fill site. Between January 1, 2018 and March 31, 2018, the site has excavated and transported 328,141 tons of ash from the Riverbend basins. Excavation and transportation of the remaining ash is expected to be completed in 2018. Post closure activities, including decommissioning of the Primary and Secondary Dams, will begin following the completion of ash excavation activities. The Riverbend site is on track to comply with the CAMA deadline of complete excavation of the ash basins by August 1, 2019. Since completing bulk dewatering in February 2017, the basins have been maintained in a dewatered state with interstitial and contact stormwater being treated through the on-site water treatment facility. 1 Ash Transported Off Site in Thousands of Tons I January 2018 to March 2018 Riverbend Ash Transportation Monthly Progress 300 250 g ecu F t ■Baseline 150 ■Actual ■Forecast L)0 1111 111. 11. 1 til ti'1 ti� ,�� til ti'1 tib ,4� tib tiE tii• tib tib ,tib tib tib tie tib o- �c oO ��° oO c�a ,- `ss � eT'44' ti� ' #‘,44- F `,pe` o'O �,oa Ja P Q? O� z Ce�z ti3 See Ash Transported Off Site in Millions of Tons Riverbend Ash Transportation Overall Progress 5 00 8/31118 8::i13 GC'., 4 50 90% a 00 30% 350 -... __ 70% 300 5 sox 2 2 50 -Baseline 15 504'. -Actual os .00 Forecast 40x -Regulatory Date 1 50 30% 100 20% 050 lOx 000 • 09. b\�ti5 \�tih o�~etie ^\�o<0 y\�ti� \�oti� \v0\e ptia \�otia no 4 .4, o\ 2 Status of Permits and Permit Applications RECEIVED DATE(R) PERMIT COMMENTS 3s /TARGET DATE (T) NCDEQ issued the ISW NPDES Industrial permit to the Company May 15, 2015 (R) May 15, 2015. SPPP Stormwater Permit Implementation date was November 15, 2015. NPD Permit became effective ES Wastewater First quarter 2016(R) December 1 Permit— Major (Modified by SOC 2016. Water Modification in 04 2016) Jurisdictional Wetlands There are no identified and Stream Impacts/ N/A jurisdictional 404 Permitting and wetlands/stream impacts. 401 WQC Intermediate Dam Submitted May 31, 2016. Decommissioning June 16, 2016 (R) Received approval Request June 16, 2016. Approval Primary Dam was modified in late 1970s by adding 10 Primary Dam feet, partially over ash. Modification August 7, 2017 (R) This soil requires removal in order to excavate the ash below. Transportation and Dam Safety excavation activities must not impact a jurisdictional dam or dike. Primary and Secondary Excavation activities are Dam Decommissioning May 1, 2018 (T) initially staying 50 feet Request Approval away from the jurisdictional dike. Removing ash from the Primary and Secondary Ash Basins will have to be reviewed with Dam Safety. Breaching of dike will require Dam Safety approval. Mine Reclamation Individual Structural Received Owner/Operator obtained Fill Permit Permit to Operate an individual structural fill Waste October 15, 2015 permit as set forth in Part II, § 130A-309.219 of CAMA. Site-specific Nuisance/Noise/Odor/ Other Requirements Other Requirements, N/A None identified. including DOT and FERC Requirements 3