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HomeMy WebLinkAboutNC0038377_Update to Pending Renewal_20150727 t striN DUKE Harry K.Sideris Senior Vice President ENERGY® Environmental,Health&Safety 526 S.Church Street Mail Code:EC3XP Charlotte, NC 28202 (704)382-4303 July 22, 2015 RECEIVEDIDENRIDWR Mr. Jeff Poupart JUL 2 7 2015 North Carolina Division of Water Resources Water Quality 1617 Mail Service Center Permitting Section Raleigh, NC 27699-1617 Subject: Duke Energy Progress, Inc. Mayo Electric Generating Plant Update to pending NPDES renewal application and Submittal of chemical characterization of water for dewatering ash basin NC0038377 Person County Dear Mr. Poupart: In response to the request from the North Carolina Division of Water Resources, please find attached a chemical characterization of ash basin free water and ash basin interstitial water for the Mayo Electric Generating Plant. The analysis conducted and reported herein is consistent with the information requested by NC DENR for other Duke Energy sites. This is submitted in support of potential upcoming dewatering activities. The results of analysis on the chemical characterization of the ash basin free water and ash basin interstitial water are presented: 1.) without additional treatment beyond the treatment in the basin and 2.) after additional treatment using different filter sizes. The following definitions may be helpful for inclusion in a re-issued NPDES permit. Ash basin free water: Water in an ash basin located above the settled layer of ash. Ash basin free water has undergone treatment in the ash basin and has the same general characteristics as water typically discharged from the ash basin. Ash basin interstitial water: Water in an ash basin that is located within the pore space of accumulated wastewater sludge or slurry. If you have any questions, please contact Mr. Shannon Langley at (919) 546-2439. t Mr.Jeff Poupart Mayo Free Water and Interstitial Water Submittal July 22,2015 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 fines and imprisonment for knowing violations. Sincerely, Harry K. Sideris Senior Vice President Environmental, Health & Safety Enclosures cc: Richard Baker, Director w/enclosure Shannon Langley w/enclosure Joyce Dishmon w/enclosure t r. Mayo Energy Complex Dewatering data submittal June 2015 $amniepecalcNon ralallakell Aluminum(moIU AetYtmw(oa/LlAmid lll lethiaimuLL1 Boron(mgIL) Bromide Cadmium(ug/l) Calcium(mg/I) Ma o Active Ash Basin 1 foot 06 08 15 0043 <1 3.31 0.066 1.70 0.7936 <1 43.0 Ma o Active Ash Basin 10 foot MIOMMIMIIII ••.. r®-" 43.0 Ma o Active Ash Basin 20 foot �•• •�-- •r r : r 44.6 Ma o Active Ash Basin 30 foot 06/08/15 45.8 Interstitial water no additional treatment 06/08/15 242 1.99 454 1.750 4.13 0.3800 1.52 102.0 Interstitial water 20 micron filter 06/08/15 9.53 1.78 304 0.366 3.86 0.3688 <1 84.0 Interstitial water 10 micron filter 06/08/15 1.08 1.13 303 0.322 3.89 0.3768 <1 84.3 Interstitial water 0.45 micron filter 06/08/15 0.032 <1 295 0.310 3.80 0.3673 <1 83.1 Ma o Active Ash Basin 1 foot IIIIMITIMIIIIIIE IIIM= 11173 ::)ITE :TSEIMINIME11 •111•17EMIIIMy-= -� --"- �t-- •-'---- Ma o Active Ash Basin 10 foot 06/08/15 Ma •Active Ash Basin 20 foot 06/08 15 Ma •Active Ash Basin 30 foot 06/08/15 • OIHM= Interstitial water no additional treatment 06/08/15 • • ••• • •• 0.800 • 06/08/15 IIIMEIESIIMEN 20.80 0.4006 •. • •• • 06/08/15 IIMEEEIM= 11111111116211111111111112M11111331111111110131=1111111111WIEM11111 Ma a Active Ash Basin 1 foot 06/08/15 Ma •Active Ash Basin 10 foot Ma o Active Ash Basin 20 foot '' '®` •• ,• Ma a Active Ash Basin 30 foot =MM.'.11111 TailliM11. 2110111111. :1106 .1.111X=IIIIMMIKEEMIMMII Interstitial water no additional treatment •- •: : •MEMEMII 060815 =MIMI=111111111 :1:11MIIMIIIMMIECEMMEIMINIE 131113• .. MITIZEMEZE • 1T7�� Interstitial water 0.45 micron filter Mu�i:LfSa •• :•• ••:• $amole Descriotiaq Colledrd Date Sul(ata(eaa/L9 TDS(ma(L3 TuYllum(ua/L1 TIN(ma(Ll TSS(ma(LI Nanadunnlmoill Zlr•C(ma/Ll Ma o Active Ash Basin 1 foot 06/08/15 59.40 330 <0.2 0.49 <5 1.88 0.005 Ma o Active Ash Basin 10 foot •• •: • • • ®" 0.006 Mayo Active Ash Basin 20 foot 06/08/15 63.95 330 <0.2 0.55 <5 1.12 0.015 r t Ma o Active Ash Basin 30 foot 06 08 15 ' • .a Interstitial water no additional treatment 06/08/15 32.78 400 2.69 2.4 7900 846 0.407 Interstitial water 20 micron filter 06/08/15 32.15 390 0.486 0.54 230 60.9 0.022 Interstitial water 10 micron filter 06/08/15 32.55 380 0.333 0.56 17 34.0 0.006 Interstitial water 0.45 micron filter 06/08/15 32.50 390 0.313 0.56 <5 32.1 <0.005