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Home My WebLink AboutNCS000548_Permit MODIFICATION Removing SW001-001A_20170124Fnergy. Mineral & Land Resources tN. W§17PH"LNTAL UUALitY ROY COOPER MICHAEL S_ REGAN le, !rLa TRACY DAVIS Lli:d%hu January 24, 2017 Roger Roper Marshall Steam Station Duke Energy Carolinas, LLC EC13K / P.O. Box 1006 Charlotte, NC 28201-1006 Subject: Removal of Stormwater Outfall Marshall Steam Station - NCS000548 Catawba County Mr. Roper: The Division of Energy, Mineral, and Land Resources (Division or DEMLR) received your October 2017 letter outlining changes resulting in stormwater outfall 001/001A being covered under your wastewater NPDES permit. The Division has reviewed and approved your request to remove this outfall from the stormwater permit. This permit modification is issued pursuant to the requirements of both 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). Please insert the attached pages with your permit and discard the previous pages (be sure not to discard the old page if the reverse side contains another part of the permit). This permit includes the following changes from the previously issued permit: • Part II Section B of the permit acknowledges removal of outfall SWO01/001A from this permit and movement of this outfall to the wastewater NPDES permit (NC0004987). All other conditions and schedules in the previous permit remain in place and in effect. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (3 0) days following receipt of this letter. This request must 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 27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding. Stotc cF Norlfi faronna I 'Environmental Qwobty i Energy, Mincraand Land Rcs rs 512 N. SA4jurk Strrrl I IrA7 MAI Sea•vlrrOmirt R�lelyli, @durthC4tdh1 � 6 P 1 1'� 919 707 9200 Permit Modification-NCS000548 January 24, 2017 Per the requirements of the Catawba Riparian Buffer Rule, all stormwater drainage from portions of this site that have been constructed after June 30, 2001 must be discharged through a correctly designed level spreader or another device that meets diffuse flow requirements per 15A NCAC 213.0243. Please take notice this permit is not transferable. Part III, B.2 addresses the requirements to be followed in case of change in ownership or control of this discharge. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Energy, Mineral, and Land Resources, or permits required by the Division of Water Resources, Coastal Area Management Act, or any other federal or local governmental permit that may be required. If you have any questions or comments concerning this permit, please contact Rick Riddle at (919) 807-6375 or at rick.riddle@ncdenr.gov. Sincerely, Original Signed by Bradley Bennett for Tracy E. Davis, P.E., CPM, Director Division of Energy, Mineral and Land Resources cc: Mooresville Regional Office, DEMLR Land Quality Section Sam Sampath, Ph.D., EPA Region IV, 61 Forsyth Street, Atlanta, GA 30303 Stormwater Permitting Program DWR Central Files NCS000548 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES PERMIT TO DISCHARGE STORMWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Duke Energy Carolinas, LLC is hereby authorized to discharge stormwater from a facility located at Marshall Steam Station 8320 East NC Highway 150 Terrell, NC Catawba County to receiving waters designated as the Catawba River, a class WS -IV, B, CA stream in the Catawba River Basin, in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. This permit issued effective May 15, 2015; amended January 24, 2017. This permit and the authorization to discharge shall expire at midnight on April 30, 2020. Signed this day January 24, 2017. Original signed by Bradley Bennett for Tracy E. Davis, P.E., CPM, Director Division of Energy, Mineral and Land Resources By the Authority of the Environmental Management Commission Permit No. NCS000548 SECTION B: ANALYTICAL MONITORING REQUIREMENTS Analytical monitoring of stormwater discharges shall be performed as specified in Tables 1-9. All analytical monitoring shall be performed during a measureable storm event at the specified-stormwater discharge outfalls (SDOs) that discharge stormwater associated with industrial activity (See Definitions). A measurable storm event is a storm event that results in an actual discharge from the permitted site outfall. The previous measurable storm event must have been at least 72 hours prior. The 72 -hour storm interval does not apply if the permittee is able to document that a shorter interval is representative for local storm events during the sampling period, and the permittee obtains approval from the local DEMLR Regional Engineer. See Definitions. Stormwater outfalls SWO01 and SWO01A have been covered in the most recent issuance of the wastewater permit (NC0004987), issued by the Division of Water Resources, as part of outfall 102 and associated effluent channel. SWO01 and SWO01A are no longer covered in this permit. Permit modified -January 24, 2017. The following parameters shall be monitored during a measurable storm event from the miscellaneous materials storage area, at outfalls designated as SW002, and SW003, and discharging to the Catawba River (Lake Norman). Table 1 Analytical Monitoring Requirements for SWO02, and SWO03 Discharge Measurement Sample Sample Characteristics Units Fre uenc 1 T pee Location3 Total Suspended Solids TSS m L semi-annual Grab SDO H standard semi-annual Grab SDO 40 CFR Part 423 Appendix A: semi-annual, if coal or ash are Priority Pollutant Metals - Ag, As, Be, mg/L transported thru Grab SDO Cd, Cr, Cu, Hg, Ni, Pb, Sb, Se, Tl, Zns drainage area Borons semi-annual, if coal or ash are mg/L transported thru Grab SDO draina e area Total Rainfall4 inches I semi-annual Rain Gauge - Footnotes: 1 Measurement Frequency: Twice per year (unless other provisions of this permit prompt monthly sampling) during a measureable storm event, until either another permit is issued for this facility or until this permit is revoked or rescinded. If the facility is monitoring monthly because of Tier Two or Three response actions under the previous permit, the facility shall continue a monthly monitoring and reporting schedule in Tier Two or Tier Three status until relieved by the provisions of this permit or the Division. 2 Grab samples shall be collected within the first 30 minutes of discharge. When physical separation between outfalls prevents collecting all samples within the first 30 minutes, sampling shall begin within the first 30 minutes, and shall continue until completed. Part II Page 6 of 17