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HomeMy WebLinkAboutNC0038377_Final Permit_200609140 VgATF9 or rte– N—Cb ENR V tt�� Mr. Larry E. Hatcher, Plant Manager Progress Energy Carolinas, Inc. Mayo Electric Generating Plant 10660 Boston Road Roxboro, North Carolina 27574 Dear Mr. Hatcher: Michael F Easley Governor William G Ross, Jr, Secretary North Carolina Department of Environment and Natural Resources September 14, 2006 Alan W Klimek, P E , Director Division of Water Quality Subject: Issuance of NPDES Permit Permit NCO038377 Mayo Electric Generating Plant Person County Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is 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 May 9, 1994 (or as subsequently amended). This final permit includes no major changes from the draft permit sent to you on May 24, 2006. The Division has reviewed your request to reduce monitoring frequency for all parameters for Outfall 002 and Outfall 009. This request cannot be granted. The proposed treatment system is innovative and has an extremely limited track record Therefore, weekly monitoring is needed to closely monitor the performance of the system. You may request reduction after 12 months of monitoring is completed and if the system performs satisfactorily. The Division has reviewed your request to postpone the effective date for all the metals limits and fluoride limits for Outfall 002. The request cannot be granted since the FGD system is expected to contribute a significant amount of these contaminants to the effluent, which might result in violation of the water quality standards. 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 (30) 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 (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits N C Division of Water Quality / NPDES Unit Phone (919) 733-5083 1617 Mail Service Center, Raleigh, NC 27699-1617 fax (919) 733-0719 Internet h2o enr state nc.us DENR Customer Service Center 1 800 623-7748 it Letter to Mr. Hatcher, page2 required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Seigel Cherntkov at telephone number (919) 733-5083, extension 594. Sincerely, ,( /brAlan W. Klimek, P.E. cc: Central Files NPDES Files Raleigh Regional Office / Surface Water Protection Section Aquatic Toxicology Unit Mr. Roosevelt Childress, EPA Region IST Environmental Sciences Section, Biological Assessment Unit Shari L. Bryant, Piedmont Region Coordinator, North Carolina Wildlife Resources Commission �t Permit No. NCO038377 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision 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, Carolina Power and Light d/b/a/ Progress Energy Carolinas, Inc. is hereby authorized to discharge wastewater from a facility located at the Mayo Steam Electric Generating Plant off of US Highway 501 northeast of Roxboro Person County to receiving waters designated as the Mayo Reservoir in the Roanoke River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective October 1, 2006. This permit and the authorization to discharge shall expire at midnight on March 31, 2007. Signed this day September 14, 2006. r/ , Alan HIimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission U Pl Permit No. NCO038377 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. Carolina Power and Light d/b/a/ Progress Energy Carolinas, Inc. is hereby authorized to: 1. Continue to operate the following systems located at Mayo Steam Electric Generating Plant, off of US Highway 501, northeast of Roxboro, Person County: • Cooling Tower System (Outfall 001). Less than once per year the cooling towers and circulating water system are drained by gravity and discharged directly to Mayo Reservoir. Ash Pond Treatment System (Outfall 002). Outfall 002 discharges directly to Mayo Reservoir. The ash pond receives ash transport water, coal pile runoff, stormwater runoff, cooling tower blowdown, and various low volume wastes such as boiler blowdown, oily waste treatment, wastes/backwash from the water treatment processes, plant area wash down water, equipment heat exchanger water, and treated domestic wastewater. Internal Outfall 008. Cooling tower blowdown is directly discharged to the ash pond. Cooling tower blowdown is usually mixed with ash sluice water prior to discharge to the ash pond. Cooling tower blowdown is indirectly discharged to Mayo Reservoir via the ash pond treatment system (Outfall 002). Internal Outfall 009. Discharge from the FGD blowdown treatment system. • Stormwater Discharge System The facility is permitted to discharge stormwater to Mayo Reservoir through the following outfalls: Outfall 004 - Drainage from the outside storage area. Outfall 005 - Drainage from the industrial area and the oil/bottled gas storage area. Outfalls 006a, 006b, 006c, 006d, 006e - Drainage from the cooling tower(s) chemical feed building structure and the cooling tower area. 2. Discharge from said treatment works and/or outfalls at the locations specified on the attached maps into Mayo Reservoir, which is classified as WS -V waters in the Roanoke River Basin. Permit NCO038377 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [001] During the period beginning on October 1, 2006 and lasting until expiration, the Permittee is authorized to discharge from Outfall 001 (Cooling Tower System) Monitoring is required only during discharge events to the Mayo reservoir Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Sample Type Sample Frequency Locationl Flow Daily Pump Logs or Effluent similar readings Free Available Chlonne2 200 pg/L 500 pg/L Weekly Grab Effluent Time of Chlorine Addition2 2 hours Weekly Logs Total Chromium3 0 2 mg/L 0 2 mg/L 2 / Month Grab Effluent Total Zinc3 1 0 mg/L 1 0 mg/L 2 / Month Grab Effluent Priority Pollutants 3 No Detectable Amount Annual Grab Effluent pH > 6 0 and < 9 0 standard units Weekly Grab Effluent Notes- 1. Samples collected in compliance with the monitoring requirements listed above shall consist of cooling tower effluent (sampled prior to draining the cooling tower(s)) prior to its discharge to the Mayo Reservoir 2 Monitoring is required only if chlorine -based compounds are added to the system. Neither free available chlorine nor total residual chlorine may be discharged from any single generating unit for more than two hours per day, unless the Permittee demonstrates to the Division that discharge for more than two hours is required for macroinvertebrate control The 500 µg/l limit is an instantaneous maximum and is to be measured during the chlorine release period The 200 µg/1 limitation is an average during the chlorine release period. Simultaneous multi -unit chlorination is permitted 3. Limitations and monitoring requirements for the 126 Priority Pollutants (per 40 CFR Part 423, Appendix A, exclusive of zinc and chromium) apply only if these substances are added by the permittee for cooling tower maintenance. Compliance with the limitations for the 126 priority pollutants in 40 CFR 423 13 (d)(1) may be determined by engineering calculations which demonstrate that the regulated pollutants are not detectable in the final discharge by the analytical methods in 40 CFR Part 136 All primary industries are required to submit a priority pollutant analysis in accordance with 40 CFR Part 122 with their application for permit renewal There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid. Permit NCO038371 A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [008] During the period beginning on October 1, 2006 and lasting until expiration, the Permittee is authorized to discharge from Outfall 008 (internal outfall, Cooling Tower System). Such discharges shall be limited and monitored by the Permittee as specified below PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Sample Sample Frequency Type Locationl Flow Daily Pump Logs or similar readings Effluent Free Available Chlorine2 200 µg/L 500 µg/L Weekly Grab Effluent Time of Chlorine Addition2 2 hours Weekly Logs Total Chromium3 0 2 mg/L 0 2 mg/L 2 / Month Grab Effluent Total Zinc3 1 0 mg/L 1.0 mg/L 2 / Month Grab Effluent Priority Pollutants 3 No Detectable Amount Annual Grab Effluent H 1 6 0 and < 9 0 standard units I Weekly I Grab Effluent Notes- . 1 Samples collected in compliance with the monitoring requirements listed above shall consist of cooling tower blowdown after ming with the fly and bottom ash, but prior to discharging into the ash pond 2 Monitoring is required only if chlorine -based compound is added to the system. Neither free available chlorine nor total resid.ial chlorine may be discharged from any single generating unit for more than two hours per day, unless the Permittee demonstrates to the Division of Water Quality that discharge for more than two hours is required for macroinvertebrate control The 500 µg/l limitation is an instantaneous maximum and is to be measured during the chlorine release period The 200 pg/1 limitation is an average during the chlorine release period Simultaneous multi -unit chlorination is permitted 3. Limitations and monitoring requirements for the 126 Priority Pollutants (per 40 CFR Part 423, Appendix A, exclusive of zinc and chromium) apply only if these substances are added by the permittee for cooling tower maintenance Compliance with the limitations for the 126 priority pollutants in 40 CFR 423 13 (d)(1) may be determined by engineering calculations which demonstrate that the regulated pollutants are not detectable in the final discharge by the analytical methods in 40 CFR Part 136. All primary industries are required to submit a priority pollutant analysis in accordance with 40 CFR Part 122 with their application for permit renewal This outfall is not authorized to discharge directly to the Mayo Reservoir. e Permit NCO038377 A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [002] (prior to addition of FGD wastewater) During the period beginning on October 1, 2006 and lasting until commencement of the FGD treatment system to treat FGD wastewater or until expiration, the Permittee is authorized to discharge from Outfall 002 (Ash Pond Treatment System) Such discharges shall be limited and monitored by the Permittee as specified below PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Daily Average Maximum Measurement Frequency Sample Type Sample Locationl Flow Weekly Pump Logs or similar readings Effluent Oil and Grease 15 0 m L 20 0 m L Monthly Grab Effluent Total Suspended Solids 30 0 mg/L 100 0 mg/L Monthly Grab Effluent Total Selenium2 3 8 pounds/day 2 / Month Grab Effluent Acute Toxicity3 Quarterly Grab Effluent Total Arsemc4 Quarterly Grab Effluent Total Copper Quarterly Grab Effluent Total Iron Quarterly Grab Effluent pH I > 6 0 and < 9 0 standard units 2 / Month Grab Effluent Notes: 1. Samples collected in compliance with the monitoring requirements listed above shall be taken prior to mixing with other waste streams 2 See Special Condition A. (8). 3 Acute Toxicity (Fathead Minnow 24-hour), February, May, August, and November, see A. (7). 4 See Special Condition A. (13). After the FGD treatment system is used to treat FGD wastewater. the effluent limits in Conditions A. (4) and A. (5) apply. There shall be no discharge of floating solids or visible foam in other than trace amounts outside an area five(5) meters from the discharge pipe No chemical metal cleaning waste may be discharged to the ash pond. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid Permit NC003837'4 A. (4) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [002] (after addition of FGD wastewater) During the period beginning upon commencement of the FGD treatment system to treat FGD wastewater and lasting until expiration, the Permittee is authorized to discharge from Outfall 002 (Ash Pond Treatment System) Such discharges shall be limited and monitored by the Permittee as specified below. PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Locationl Flow Weekly Pump Logs or similar readings Effluent Oil and Grease 15 0 m /L 20 0 m /L Monthly Grab Effluent Total Suspended Solids 30 0 mg/L 100 0 mg/L Monthly Grab Effluent Total Selenium 3 8pounds/day Weekly Grab Effluent Acute Toxicit 2 Quarterly Grab Effluent Total Mercury3 0 012 pg/L Weekly Grab Effluent Total Arsernc4 Weekly Grab Effluent Total Beryllium 0 0068 /L Weekly Grab Effluent Total Cadmium 2 0 /L Weekly Grab Effluent Total Chlorides 230 m /L Weekly Grab Effluent Total Chromium 50 0 /L Weekly Grab Effluent Total Copper Weekly Grab Effluent Total Fluoride 18 m /L Weekly Grab Effluent Tota Lead 25 0 N /L 33 8 /L Weekly Grab Effluent Tota Manganese 200 0 /L Weekly Grab Effluent Total Nickel Weekly Grab Effluent Total Silver Weekly Grab Effluent Total Zinc Weekly Grab Effluent Total Barium 10 mg/L Weekly Grab Effluent Total Thallium 0 35 Ng/L Weekly Grab Effluent Total Vanadium 24 0 N /L Weekly Grab Effluent Total Iron Quarterly Grab Effluent pH > 6 0 and < 9 0 stancard units 2 / Month Grab Effluent Notes 1. Samples collected in compliance with the monitoring requirements listed above shall be taken prior to mixing with other waste streams 2 Acute Toxicity (Fathead Minnow 24-hour), February, May, August, and November, see A. (7). 3 The mercury limit takes effect one year after the FGD system begins to treat FGD wastewater. 4 See Special Condition A.(13). The permittee shall inform the Raleigh Regional Office and the NPDES Unit (via telephone and via letter) when the FGD treatment system will begin treating FGD wastewater. There shall be no discharge of floating solids or visible foam in other than trace amounts outside an area five(5) meters from the discharge pipe. No chemical metal cleaning waste rnay be discharged to the ash pond There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid. w Permit NCO038377 A. (5) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [009] During the period beginning upon commencement of the FGD treatment system to treat FGD wastewater and lasting until expiration, the Permittee is authorized to discharge from Internal Outfall 009 (treated FGD wet scrubber wastewater) Such discharges shall be limited and monitored by the Permittee as specified below. PARAMETER LIMITS Monthly Daily Average Maximum MONITORING REQUIREMENTS Measurement Sample Sample Frequency Type Locationl Flow Semi -Annual Monthly Instantaneous Effluent Total Suspended Solids Clarity Weekly Grab Effluent Total Mercury SDO Weekly Grab Effluent Total Selenium Semi -Annual Weekly Grab Effluent Total Arsenic Other obvious indicators of stormwater pollution ee ly Grab Effluent Total Beryllium Weekly Grab Effluent Total Cadmium Weekly Grab Effluent Total Chlorides Weekly Grab Effluent Total Chromium Weekly Grab Effluent Total Copper Weekly Grab Effluent Total Fluoride Weekly Grab Effluent Total Lead Weekly Grab Effluent Total Manganese Weekly Grab Effluent Total Nickel Weekly Grab Effluent Total Silver Weekly Grab Effluent Total Barium Weekly Grab Effluent Total Thallium Weekly Grab Effluent Total Vanadium Weekly Grab Effluent Total Zinc Weekly Grab Effluent Notes: 1 Samples collected in compliance with the monitoring requirements listed above shall be taken from the FGD treatment system prior to discharge to the Ash Pond A. (6) STORMWATER MONITORING REQUIREMENTS/ Qualitative Monitoring Qualitative monitoring requires a qualitative inspection of each stormwater outfall, regardless of representative outfall status, for the purpose of evaluating the effectiveness of the Stormwater Pollution Prevention Plan and assessing new sources of stormwater pollution No analytical tests are required Qualitative monitoring of stormwater outfalls does not need to be performed during a representative storm event Stormwater Discharge Characteristics Measurement Fre uenc 1 Sample Locationl Color Semi -Annual SDO Odor Semi -Annual SDO Clarity Semi -Annual SDO Floating Solids Semi -Annual SDO Suspended Solids Semi -Annual SDO Foam Semi -Annual SDO Oil Sheen Semi -Annual SDO Other obvious indicators of stormwater pollution Semi -Annual SDO Notes: 1. Measurement Frequency Qualitative monitoring will be performed twice per year, once in the spring (April - June) and once in the fall (September - November) 2 Sample Location SDO- Stormwater Discharge Outfall 0. DENR/ DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES No. NC0038377, Progress Energy Carolinas, Inc. Mavo Steam Electric Generating Plant Information Applicant/ Facility Name: I Progress Energy Carolinas/Mayo Steam Electric Generating Plant SIC Code: SUMMARY The Mayo Electric Generating Plant is a coal-fired electric generating plant with one unit rated at a maximum dependable capacity of 745 mw. Water for plant uses is withdrawn from the Mayo Reservoir as required to make up evaporative losses from the cooling tower, boiler water and drinking water needs. This facility is subject to EPA effluent guideline limits per 40 CFR 423- Steam Electric Power Generating Point Source Category. The facility is not subject to the 316(b) Phase II regulations since it is a closed cycle cooling system and has a design flow of less than 50 MGD. The facility operates the following outfalls: • Outfall 001 - Cooling tower system. This system is drained for maintenance approximately once a year to the reservoir. The discharge is monitored and reported on the DMRs. • Outfall 002 - Ash pond treatment system (including low volume waste, ash sluice water, cooling tower blowdown, coal pile runoff, FGD blowdown, etc.) Cooling tower blowdown is usually mixed with bottom and fly ash prior to discharging into the ash pond. • Outfall 008 (internal) - Cooling tower blowdown is directly discharged to the ash pond. Cooling tower blowdown is usually mixed with ash sluice water prior 4 NPDES PERMIT FACT SHEET Page 2 Progress- Mayo NPDES No. NCO038377 to discharge to the ash pond. Cooling tower blowdown is indirectly discharged to Mayo Reservoir via the ash pond treatment system (Outfall 002). • Outfall 009 (internal) - FGD blowdown. • Outfalls 004, 005, and 006a, b, c, d, e - stormwater outfalls. Progress submitted their request for modification of their permit on March 1, 2006 The company is currently operating under the NPDES permit issued December 5, 2005, which will expire March 31, 2007. The modification request is in response to North Carolina's Clean Air Initiative (Clean Smokestacks Bill), which requires the reduction of SOx and NOx from air emissions. As a result of this initiative, the company plans to install Flue Gas Desulfurization (FGD), systems at several plants. The FGD is essentially a scrubber system to remove SOx by mixing flue gas with a limestone slurry. The FGD blowdown is predicted to generate a flow of 0.253 MGD, with relatively elevated concentrations of metals and chloride. Progress Energy plans to treat the FGD blowdown via proprietary bioreactor technology. Solids will be removed from the blowdown stream prior to entering a bioreactor which utilizes microorganisms to reduce soluble contaminants to insoluble forms (under anaerobic conditions) that then precipitate from solution. The treated FGD blowdown will then be routed to the Ash Pond. Predicted concentrations from the Ash Pond (Outfall 00 1) are listed on the attached pages (Tables la 8s lb). No other changes in wastewater are anticipated at the plant. The addition of FGD blowdown will only affect the effluent discharge from the ash pond via Outfall 002. TOXICITY TESTING: Current Requirement: Acute P/F at 90%, February, May, August, November. Proposed Requirement: Acute P/F at 90%, February, May, August, November. The facility has passed all chronic toxicity tests during the previous 4.5 years. COMPLIANCE SUMMARY: BASED ON THE PREVIOUS 5 YEARS There are no outstanding and/or chronic compliance problems related to the NPDES permit. A compliance evaluation inspection conducted on 03/31/05 found that facility is in compliance. The only Notice of Violation that was issued during previous 5 years was for TRC (10/13/2003). Letter from Environmental Sciences Branch (05/09/05) concurred with the latest report from Progress that chemical and biological characteristics of Mayo reservoir are similar to prior years. PROPOSED CHANGES Limits: As outlined in the attached spreadsheet, based on estimated values of the blowdown concentration and estimated removal efficiency (both provided by Progress Energy), estimated effluent concentrations from the FGD treatment system can be calculated. Maximum predicted effluent concentrations can be determined based on a coefficient of variation of 0.6 and multiplier of 13.2 (as outlined in NC's RPA procedure based on EPA's Technical Support Document, n = 1). Based on these values, the Division would promulgate limits for: Hg, Be, Cd, Chlorides, Cr, F, Pb, Mn, Ba, Tl, and V. NPDES PERMIT FACT SHEET Page 3 Progress- Mayo NPDES No. NCO038377 Misc: An internal outfall 009 was created to monitor the influent to ash pond from FGD treatment system. PROPOSED SCHEDULE FOR PERMIT ISSUANCE Draft Permit to Public Notice: 5/24/06 (est.) Permit Scheduled to Issue: 6/19/06 (est.) STATE CONTACT If you have any questions on any of the above information or on the attached permit, please contact Sergei Chernikov at (919) 733-5038, extension 594. REGIONAL OFFICE COMMENT NAME: EPA COMMENT - NAME. DATE: Attachment 1a for Fact Sheet Progress Energy Carolinas, Inc (PEC) ' Mayo Electric Generating Plant NC0038377 Mass Input to Parameter Estimated FGD ABMet lbs/day ^ Blowdown Conc. ug/L Predicted Mass Output from Removal Eff. ABMet lbs/day ^ Estimated Effluent Estimated Effluent conc mg/L ^^ conc. ug/L Antimony 440 0092841 720000 0025995 0000413 041 Arsenic 390 0082291 00000 0082291 0001306 1000 Barium 25190 5.315140 00000 5315140 0.084378 8438 Beryllium 250 0052751 0.0000 0052751 0000837 084 Boron 790 0166692 00000 0.166692 0.002646 265 Cadmium 80 0016880 00000 0016880 0000268 027 Chloride 160000000 33760 320000 00000 33760 320000 535 945982 535945 98 Chromium 121 0 0255312 00000 0255312 0004053 405 Cobalt 77.0 0162472 891000 0017709 0000281 028 Copper 720 0151921 928000 0010938 0000174 0 17 Fluoride 184000 38 824368 00000 38 824368 0616338 61634 Lead 790 0166692 00000 0166692 0002646 265 Manganese 14500 3.059529 00000 3.059529 0048570 4857 Mercury 380 0080181 51 9000 0038567 0000612 061 Molybdenum 12900 2.721926 956000 0119765 0001901 1 90 Nickel 576.0 1 215372 95.9000 0049830 0000791 079 Selenium 54800 11 562910 850000 1 734436 0027534 25.00 Thallium 80 0016880 81 3000 0003157 0000050 005 Vanadium 650 0.137151 00000 0137151 0002177 2.18 Zinc 36900 7785974 940000 0467158 0007416 7.42 " Mass input to ABMet is based on FGD est blowdown of 0 253 MGD and est concentrations provided by Progress =xmg/L*0253 MGD *834 ^^ The concentration output is based on the flow from the ash pond (7 3 MGD) + flow from FGD (0.253 MGD) = 7 553 MGD mass (lbs/day)/ (7 553 * 8 34) = conc mg/L Progress Energy Carolinas, Inc. Attachment 1 b for Fact Sheet Mayo Electric Generating Plant NCO038377 Parameter Estimated FGD (C Waters) Allowable Estimated Effluent Acute Maximum Predicted Blowdown Conc * WQ standard EPA Criteriakllowat ug/L conc ug/L ^^ Values ug/L conc. for RPA # Limit or Monitor? Antimony 440 56 56 041 541 Monitor Arsenic 390 10 10 1000 13200 Monitor Barium 25190 1000 1000 8438 111382 Limit Beryllium 250 00068 0.0068 084 11 09 Limit Boron 790 750 750 265 3498 Monitor Cadmium 80 2 2 027 15 356 Limit Chloride (mg/L) 160000 230 mg/L (AL) 230000 535945 98 7074486.94 Limit Chromium 121 0 50 50 405 1022 5346 Limit Cobalt 770 65 65 028 370 Monitor Copper 720 7 (AL) 7 017 224 Monitor Fluoride 184000 1 8 mg/L 1800 61634 813569 Limit Lead 790 25 25 265 338 3498 Limit Manganese 14500 200 200 4857 64112 Limit Mercury 38 0 0 012 0.012 061 805 Limit Molybdenum 12900 170 170 1 90 2508 Monitor Nickel 5760 25 25 079 261 1043 Monitor Selenium 54800 5 5 2500 56 33000 Keep Limit Thallium 80 0.35 035 005 066 Limit Vanadium 650 24 24 218 28.78 Limit Zinc 3690.0 50 (AL) 50 7.42 67 9794 Monitor (AL) * Concentrations are in ug/L unless otherwise noted ^" The concentration output is based on the flow from the ash pond (7 3 MGD) + flow from FGD (0 253) = 7 553 MGD = mass (lbs/day)/ (7 553 * 8.34) = conc mg/L # Estimated effluent conc * 13 2 IWC = 100% (assumed, since discharge is into the Lake and no modeling was conducted) Limit or monitor determined by one data point (the estimated concentration from the ash pond effluent). As defined in EPA TSD for one data point, CV = 0.6 and the multiplier is 13.2 Mayo Permit modification - removal efficiencies miap.//sergei chemikov%40dwq.denr.ncmail.net@cros.ncmail.net 143/. Subject: Mayo Permit modification - removal efficiencies From:',England, Louise" <louise.england@pgnmail.com> Date: Mon, 24 Apr 2006 12:48:11 -0400 To: <sergei.chernikov@ncmail.net> Sergei, Our contract with Zenon (Applied Biosciences) is for the bioreactor discharge to equal or be below the following concentrations: Arsenic 10 ug/I Selenium 25 ug/1 I provided some removal efficiencies to Dawn Jefferies for the Roxboro Permit mod. These do not include arsenic and selenium since we are shooting for a concentration of the discharge. Metal Removal Efficiency % entimony 72 chrullium 0 coppe um 0 lead d' 92.8 merc 0 zinr.ury 51.9 bac 94 cohum 0 r aalt 89.1 molybdenum 95.6 manganese 0 I used the lowest removal efficiency from the last 4 data points. If the effluent of Bioreactor 2 was a < value, I used that value to calculate the removal efficiency. While I feel that the removal efficiencies will be greater, this provides some conservatism. Please give me a call if you have any questions. Louise England Progress Energy (919) 546-6318 1 -r 1 AMAP) nf, 17•S) P Mayo permit mod imap://sergei.chemikov%40dwq.denr.ncmail.net@cnis.ncmall.net.143L Subject: Mayo permit mod From: "England, Louise" <louise.england@pgnmail.com> Date: Mon, 24 Apr 2006 13:24:22 -0400 To: <sergei.chernikov@ncmail.net> Sergei, I spoke with Tun Pickett of Applied Biosciences and he was able to provide Ni and Thallium info. I do not know why Nickel was not in the pilot report. Thallium was tracked only at the beginning of the study. Based on my previous email I would have you use the 81.3 % removal efficiency for thallium which would be low compared to later removal efficiencies as the system had just started up and the removal efficiencies improved. Nickel would be 95.9 %. I do data for any other metals. Please give me a call if you have any questions. Thanks, Louise England Nickel (ug/L) Bioreactor 2 Date Influent 81.3 12/16/2000 21.4 12/21/2000 986 12/26/2000 65.7 1/11/2001 855 2/1/2001 533 2/9/2001 540 2/15/2001 821 Thallium (ug/L) Date Influent 12/17/2000 2.46 12/22/2000 16.5 12/27/2000 6.64 Bioreactor 1 62.9 6.7 67.6 33.5 24.5 13.8 27.5 28.2 17.2 14.2 19.9 16.2 213 33.8 Bioreactor 2 68.7 96.6 79.0 96.7 97.3 97.0 95.9 Bioreactor 1 Bioreactor 2 <0.20 0.46 81.3 <0.20 0.69 95.8 <0.20 <0.20 97.0 Removal Eff% Removal Eff% I of 1 d/Id/7006 1.17 W Whole Effluent Toxicity Testing Self -Monitoring Summary April ts, 2006 FACILITY REQUIREMENT _ _ YEAR JAN _ FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC CP&L-Lee1001 Ash Pond chr hm 1 41 % Cen7dPF 2002 — — >5 64 >5 64 — >5 64 — — >5 64 — -- Pass NC0003417/001 Begin 11/1/2004 Frequency Q Mar Jun Sep Dec + NonComp Single 2003 — — Late Late Pass Pass — — Pass — -- Pass County Wayne Region WARD Subbasm NEU12 2004 -- — Pass — — Pass — — Pass — — Pass PF VAR Special 2005 — — Pass — — Pass — — Pass — — Pass 7Q10 2630 IWC(%)047 Order 2006 — — CP&L-Lee/002 24hr LC50 ac monit epis fthd Fthd24Ac 2002 — — — — — H — — — — — — NC0003417/002 Begin l (/1/2004 Frequency SOWD/A NonComp 2003 — — — — — H — — — — — — County Wayne Region WARO Subbasim NEU12 2004 — -- — — -- H — — -- — PF VAR Special 2005 — — — — — H — — — -- -- — 7Q10 2630 IWC(%)NA Order 2006 — — CP&L-Mayo Steam Electric Plant 24hr fathead p/f ac lim 90% Fthd24PF 2002 — Pass — — Pass — — Invalid Pass — Pass — NC0038377/002 Begin 1/1/2006 Frequency Q P/F + Feb May Aug Nov + NonComp Single 2003 — Pass — — Pass — -- Pass — — Pass -- County Person Region RRO Subbasin ROA05 2004 — Pass — — Pass -- — Pass -- — Pass — PF NA Special 2005 — Pass — — Pass — — Pass — — Pass — 7Q10 Lake IWC(%)NA Order 2006 — Pass CP&LShearon Harris E&E Center 24hr p/f ac lim 90% Fthd24PF 2002 — Pass —• — Pass — — Late Pass — Pass — NC0039586/007 Begin 5/1/2002 Frequency Q + Feb May Aug Nov + NonComp Single 2003 — Pass — — Pass — — Pass — — Pass — County Wake Region RRO Subbasm CPF07 2004 — Pass -- — Pass — — Pass — — Pass — PF 002 Special 2005 — Pass — — Pass — — Pass — -- Pass — 7Q10 LAKE IWC(%)NA Order 2006 — Pass CP&L-Shearon Harris/006 24hr p/f ac lim 90% Fthd24PF 2002 — '99 — — >99 — — Lale Pass — Pass — NC0039586/006 Begin 5/1/2002 Frequency Q + Feb May Aug Nov + NonComp 2003 — Pass — — Pass Pass — Pass — — Pass — County Chatham Region RRO Subbasm CPF07 2004 — Pass — — Pass — — Pass — — Pass -- PF 18 6 Special 2005 — Pass — — Pass -- — Pass — — Pass — 7QI0 LAKE IWC(%)NA Order 2006 — Pass CP&I-Sutton/001 Progress Energy 24hr LC50 an monit fthd Fthd24Ac 2002 — H>99 H H H H H >99 H >99 >99 >99 NC0001422/001 Begin 2/1/2003 Frequency M NonComp 2003 >99 >99 >99 >99 H H >99 >99 >99 >99 >99 >99 County New Hanover Region WIRO Subbasm CPFI7 2004 >99 H >99 H >99 H >99 >99 199 >99 >99 >99 PF NA Special 2005 >99 '99 >99 >99 H >99 >99 >99 >99 >99 >99 H 7Q10 Tidal IWC(%)NA Order 2006 H H CP&L-Wentherspoon/001 24 hr LC50 ac morn epis fthd Fthd24Ac 2002 — — — — — H -- — — — — — NC0005363/001 Begin 11/1/2004 Frequency 5 OWD/A NonComp 2003 — — — — —• H — — — — — — County Robeson Region FRO Subbasin LUM51 2004 — — — — — H — — — — — — PF NA Special 2005 — — — — — H — — — — — — 7Q10 122 IWC(%)NA Order 2006 — — Cramerton WWTP chr hin 47% Cen7dPF Y 2002 — — Pass — — Pass -- — Pass — —• Pass NC0006033/001 Begin 6/1/2005 Frequency Q Mar Jun Sep Dec + NonComp Single 2003 — — Pass — — Pass — — Pass — — Pass County Gaston Region MRO Subbasin CTB36 2004 — — Pass,>16(P) — — Pass,>18(P) — — Pass,>18(P) — — Pass PF 40 Special 2005 — — Pass — — Pass — — Pass — — Pass 7QI0 125 IWC(%)47 Order 2006 — — Craven Co Wood Energy -001 CHR LIM 69% Cen7dPF 2002 — — Pass — —• Pass — — Pass — — Pass NCO075281/001 Begin 5/1/2004 Frequency Q Mar Jun Sep Dec + NonComp Single 2003 — — Pass — — Pass — — Pass — — Pass County Craven Region WARO Subbienn NEU08 2004 — — Pass — — Pass — — Fell >100 927 Pass PF 020 Special 2005 — — Pass — — Pass — — Pass — — Pass 7Q10 0 14 IWC(%) 68 89 Order' 2006 — — Creswell WTP Chr Momt 90% Cen7dPF 2002 — — — — — — — —• — — — — NC0027600/001 Begin 7/1/2004 Frequency Q Feb May Aug Nov + NonComp 2003 — — — — — — — — — — — — County Washington Region WARO Subbasin PAS53 2004 — — — — — — -- Pass — -- Pass — PF 0 011 Special 2005 — Pass — — Pass — — Pass — — Pass — 7Q10 0 IWC(%)100 Order 2006 — Pass Crooked Creek W WTP q2 chr lim 90% Cen7dPF 2002 — Pass — — Pass — — Pass — — Pass — NC0069841/001 Begin 7/1/2005 Frequency Q Feb May Aug Nov + NonComp Single 2003 — Pass — — Pass — — Pass — —• Pass — County Union Region MRO Subbasin YAD14 2004 — Pass — — Pass >100(P)t >100(P)t Pass — — Pass>100(P) — PF 19 Special 2005 — Pass — -- Fail >100 >100 Pass — -- Pass — 7Q10 00 IWC(%)100 Order 2006 — Pass Y Pre 2002 Data Available LEGEND. PERM = Permit Requirement LET = Administrative Letter - Target Frequency = Monitoring frequency Q- Quarterly, M- Monthly, BM- Bimonthly, SA- Semiannually, A- Annually, OWD- Only when discharging, D- Discontinued monitoring requirement Begin= First month required 7Q10 =Receiving stream low flow criterion (efs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - ex Jan, Apr, Jul, Oct NonComp = Current Compliance Requirement PF = Permitted flow (MGD) IWC%= Instreame waste concentration P/F = PassfFail test AC = Acute CHR = Chrome DataNotation f - Fathead Minnow,' - Cenodaphnia sp , my - Mysid shrimp, ChV - Chrome value, P -Mortality of stated percentage at highest concentration, at -Performed by D WQ Aquatic Tox Unit, bt - Bad test Reporting Notation --- = Data not required, NR - Not reported Facility Activity Status I - Inactive, N - Newly Issued(To construct), H - Active but not discharging, t -More data available for month in question, = ORC signature needed 13 August 21, 2006 MEMORANDUM To:.Mchael Douglass, Division of Environmental Health Public Water Supply Section Raleigh Regional Office From: Sexgei Chernikov, Division of Water Quality Subject Review of the discharge locations for the following- Mayo ollowingMayo Steam Electric Generathg Plant NCO038377 Person County ;2- JP C'J- U-> Please mdicate below by September 14, 2006 your agency's position or viewpoint on the facility listed above. Attached is the staff report for the facility_ We cannot issue the pe dt without your concurrence. Please return this form at your earliest convenience. RESPONSE: This agency has reviewed the draft permit and determined that ther ose discharge will not be sufficiently close to any existing or known pr posed public water supply intake so as to create an adverse effect on water quality. We concur with the issuance of this permit provided the facility is operated and maintamed properly, the stated effluent limits are met prior to discharge, and. the &cha b does not contravene the designated water quality standards, Concurs with issuance of the above permit, provided the following conditions are met Opposes the issuance of the above permit, based on reasons stated below, or attached 9``�� Signed � Date: � 2� �b cc: file AUG 2 12008 LO 'd 66: S l 9002 LZ $ntl 6 LLML6 L6: X8A 33HOS IN I Od 010 unap //sergei chermkov%40dwq dennncmail net@cros ncmail net 143/ • Subject: Re: question about NCO038377 From: Shell.Karrie-Jo@epamail.epa.gov Date: Fn, 18 Aug 2006 12:24:28 -0400 To: Sergei Chernikov <serge1.chem1kov@ncma1l.net> Sorry...I have no comments on the revised mod Karrie-Jo Robinson -Shell, P E. Sergei Chernikov <sergei.cherniko vOr(-mai 1 _nPt-� 08/17/2006 11.14 AM Karrie-Jo, To Karrie-Jo Shell/R4/USEPA/US@EPA cc ' Subject question about NCO038377 I have not received any comments from you regarding modification for Mayo Electric Plant (Progress Energy). Please let me know if you have any questions/comments. Sergei Sergei Chernikov, Ph.D. Environmental Engineer NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 phone: 919-733-5083 ext. 594 fax: 919-733-0719 1 of 1 8/18/2006 12.45 PN Progress Energy 9Y Sergei Chernikov NC Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 File: 12520 B-1 3uN 13 ,2006 Subject: Carolina Power & Light Company d/b/a Progress Energy Carolina, Inc. Mayo Electric Generating Plant NPDES Permit No. NCO038377 Comments on Draft Permit Dear Dr. Chermkov: Enclosed are our comments on the subject draft NPDES permit. We appreciate the opportunity to comment. As per our conversation with you on June 8, 2006, modeling studies of Mayo Lake will be completed in the next several months and will be submitted to you upon completion At that same time the NPDES renewal application will also be submitted. If you have any questions please contact Louise England at (919) 546-6318. 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 qual f ed 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 offines and imprisonment for knowing violations ID E C E 0 V E I J UN 14 2006 j f DENR - WATER QUALITY J _`_ POINT SOURCE RRg1CH Progress Energy Carolinas, Inc Mayo Steam Plant 10660 Boston Road Roxboro, NC 27574 Sincerely, Michael J. Mosley Acting Plant Manager — Mayo E. G. Plant JUN 13 2006 Mayo Electric Generating Plant Draft NPDES Permit Comments PART Section A(4). — Effluent Limitations And Monitoring Requirements • Progress Energy (PE) requests that the monitoring frequency be reduced to monthly for all parameters with weekly monitoring required. Monthly monitoring will be sufficient to demonstrate the performance of treatment facilities. PE requests that the limits for Total Beryllium, Total Cadmium, Total Chloride, Total Chromium, Total Fluoride, Total Lead, Total Manganese, Total Barium, Total Thallium, and Total Vanadium become effective one year after commencement of the FGD system to treat FGD wastewater. Section A.(5). — Effluent Limitations and Monitoring Requirements • PE requests that the monitoring frequency be reduced to monthly for all parameters with weekly monitoring required. Monthly monitoring will be sufficient to demonstrate the performance of treatment facilities. about blank 1. Shari, I am forwarding you the letter from Progress Energy that responds to your concern regarding use of innovative technology for treatment of FGD wastewater. I hope that proposed plan of action addresses you concerns. Please let me know if you have any additional questions or comments. Sergei ------- Original Message-------- Subjeet:RE: request Date:Thu, 17 Aug 2006 12:01:43 -0400 From:"England, Louise" <louise.england@pgnmail.com> To:"Sergei Chermkov" <sergei.chemikov@ncmail.net> Sergei, Attached is a signed copy of the letter you requested. Thanks, Louise England -----Original Message ----- From: Sergei Chernikov [mailto:sergei.chernikov@ncmail.net] Sent: Thursday, August 17, 2006 10:29 AM To: England, Louise Subject: request Louise, Thank you for letter regarding Mayo contingency plan. I would greatly appreciate if you could e-mail me this letter in electronic form. Sergei Sergei Chernikov, Ph.D. Environmental Engineer NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 phone: 919-733-5083 ext. 594 fax: 919-733-0719 Sergei Chernikov, Ph.D. Environmental Engineer NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 1 of 2 8/17/2006 12 48 PIV about blank phone: 919-733-5083 ext. 594 fax: 919-733-0719 2 of 2 8/17/2006 12:48 PM s Progress Energy� 9 File: Mayo 12520 B-1 AUG 15 2006 North Carolina Department of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Subject: CP&L d/b/a Progress Energy Carolinas, Inc. (PEC) Mayo Electric Generating Plant NPDES Permit No NCO038377 Dear Dr Chernikov: As per your request via email for PEC's contingency plan in the event that the ABMet technology does not perform as expected in the treatment of Flue Gas Desulfurization (FGD) blowdown wastewater, the following is submitted. As I stated in my email response to you, a pilot study will be performed at Asheville Steam Electric Plant this fall utilizing FGD blowdown from the operating units there. The pilot study will be better tailored to the wastewater produced at Mayo Electric Generating Plant due to the burning of coals that are commonly supplied to our generating plants. In addition, Roxboro Steam Electric Plant wastewater treatment system, which is identical to Mayo Plant's wastewater treatment system, will be in operation for approximately 18 months prior to Mayo Plant FGD system beginning operation. If we find that the ABMet technology cannot meet our expectations, there are other technologies that can be used and we will shift plans accordingly. Please contact Louise England at (919) 546-6318 if there are any questions concerning the information in this submittal • r- - ij ' iJ Ir 11-- +I i ! 1 6 2906 DENR - IJI'AT ER DUALITY T Progress Energy Carolinas, Inc Mayo Steam Plant 10660 Boston Road Roxboro, NC 27574 Sincerely, A Larry E. Hatcher — Manager Mayo Electric Generating Plant �d North Carolina Wildlife Resources Commission f f Richard B Hamilton, Executive Director MEMORANDUM TO- Sergei Cherenkov, NPDES Unit 42rs ion of Water Quality � FROM L Bryant, Pi dmont Region Coordinator Habitat Conservation Program DATE- 27 June 2006 Y R, 'Yl ;Iii Y SUBJECT- Proposed Permit Modification for Progress Energy, Mayo Electric Generating Plant, Person County, NPDES Permit No NC0038377 Biologists with the North Carolina Wildlife Resources Commission have reviewed the subject permit modification and we are familiar with the habitat values of the area. Our comments are provided in accordance with provisions of the Clean Water Act of 1977 (as amended), Fish and Wildlife Coordination Act (48 Stat 401, as amended; 16 U.S.0 661-667d), and North Carolina General Statutes (G S. 113-131 et seq ) Progress Energy has applied for modification of its NPDES permit to discharge treated industrial wastewater into Mayo Reservoir in the Roanoke River Basin The modification includes discharge of treated flue gas desulfurization wastewater Mayo Reservoir supports a diverse fishery including sunfish (Lepomis spp ), crappie (Pomoxis sp ), catfish (ktalurus sp ), and largemouth bass (Micropterus salmoides) Treated flue gas desulfurization wastewater may contain chlorides and several metals including mercury, cadmium, beryllium, chromium, manganese, barium, thallium, and vanadium We are concerned about the potential for bioaccumulation of some of these metals in the fish species within the reservoir and the impact to anglers that may consume these fish We appreciate the Division of Water Quality (DWQ) forwarding the additional information and answering our questions on this permit modification Based on the information provided, limits have been established for chlorides and the metals listed above and intensive monitoring of the treated wastewater will occur to ensure that these permit limits are not exceeded. It is our understanding the proposed process for removing chlorides and metals from the flue gas desulfurization wastewater is new and innovative While we will not object to the permit, modification, we request a contingency plan be developed should monitoring reveal that the proposed treatment process is not effective at maintaining the levels of chloride and metals below the permit limits Mailing Address: Division of Inland Fisheries • 1721 Mail Service Center • Raleigh, NC 27699-1721 Telephone: (919) 707-0220 0 Fax: (919) 707-0028 Page 2 27 June 2006 Mayo Electric Generating Plant NPDES Permit No NC0038377 Thank you for the opportunity to provide input on this permit modification. If we can be of further assistance, please contact our office at (336) 449-7625. ec: Brian McRae, WRC Corey Oakley, WRC S' -S (C� 2Gt Wt�v 1, �- STATE OF NORTH CAROLINA, PERSON COUNTY PRINTER'S AFFIDAVIT ib�m being duly sworn, deposes and says That fie/she is Tuloww of The Courter -Times, with its principle place of business located in the city of Roxboro, County of Person, State of North Carolina, that the foregoing or attached newspaper notice was published in The Courier -Times, once a week for 1 successive weeks, beginning with r1'411 its issue of a I day of 20_Q_�, and ending with its issue ofol l day of 200`0 , that The Courier -Times, is the sole owner and publisher of said newspaper, The Courier -Times Sworn to and subscribed before me, PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis of thorough staff review and application of NC General Statute 143 21, Public law 92-500 and otherlawful standards and regulations, the North Carolina Environmental Management Commissionproposes to issue a National Pollutant Discharge Elimination System (NPDES) wastewater discharge permit to the person(s) listed below effective 45 days from the publish date of this notice Progress Energy, 10660 Boston Road, Roxboro, NC 27574 has applied for a modification of its NPDES discharge permit for Mayo Electric Generating Plant (number NCO038377) discharging treated industrial wastewater to the Mayo Reservoir in the Roanoke River Basin. The NPDES permit is being modified to include the discharge of treated flue gas desulfurization wastewater, Mercury, cadmium, berilhum, chlorides, chromium, manganese, barium, thallium, and vanadium are water quality limited This discharge may affect future discharges in this portion of the Roanoke River Basin Written comments regarding the proposed permitwill be accepted until (Affiant) 30 days after the publish date of this All d this the day of Y 20 Ru'A (Notary Public) My commission expires the ocmdayofirn�4e� (Notarial Seal) notice commentsreceive pnorto that date are considered in the final determinations regarding the proposed permit The Director of the NC Division of Water Quality may decide to hold a public meeting forthe proposed permit should the Division receive a significant degree of public interest Copies of the draft permit and other supporting information on file used to determine conditions present in the draft permit are available upon �1 request and payment of the costs of 20 r reproduction Mail comments and/or (Publication Fee $%40 ) T Ce 7 requests for information to the NC Division of Water Quality at the above address or call Ms Carolyn Bryant (919) 733-5083, extension 363 or Ms Frances Candelana (919) 733-5083, extension 520 at the Point Source Branch Please Include the NPDES permit number (NCO038377)in any communication Interested persons may also visit the Division of Water Quality at 512 N Salisbury Street, Raleigh, NC 27604-1148 between the hours of 8 00 a m and 5 00 pm. to review Information on file May 27 EECE W E' I J U, i, [ut)o i DENR - WATER QUALITY POINT SOURCE BRANCH neap //sergei chermkov%40dwq denr ncmail.net@curs ncmail net- 143/ Subject: Draft Permit reviews (2) From: John Giorgino <john.giorgmo@ncmail net> Date: Mon, 26 Jun 2006 10:50:09 -0400 To: sergei chermkov <sergei.chernikov@ncmail.net> Hi Sergei, I have reviewed the following: NCO038377 Mayo Getting back to you late on this. NCO024325 N Buffalo I have no comments. Thanks for forwarding them. John Giorgino Environmental Biologist North Carolina Division of Water Quality Environmental Sciences Section Aquatic Toxicology Unit Mailing Address: 1621 MSC Raleigh, NC 27699-1621 Office: 919 733-2136 Fax: 919 733-9959 "The real work of men was hunting meat The invention of agriculture was a giant step in the wrong direction, leading to serfdom, cities, and empire From a race of hunters, artists, warriors, and tamers of horses, we degraded ourselves to what we are now: clerks, functionaries, laborers, entertainers, processors of information." - Edward Abbey 1 of 1 6/26/2006 12.21 PM i 'ERM Surfacewater Modeling Group Grace Lake, Michigan 3-D Thermal Discharge Modeling Services Include: Study Design and Field Program Layout Model Development and Application NPDES Permit Applications Public Presentations and Testimony Software Development (FORTRAN, V8, ArcGIS) Training for GEMSS and CE -QUAL -W2 CE-QUAL-W2 Model Apphcation to Lake Mohave, CA ERM's Surfacewater Modeling Group (SMG) is an internationally -recognized group of surface water professionals supporting clients since 1976 The group specializes in modeling and analysis of watersheds, rivers, lakes, reservoirs, estuaries and coastal waterbodies Model applications are made in support of thermal plume investigations, point source discharge permits, optimization of cooling water facilities, oil spill damage assessments, PRP litigation, reservoir water quality studies, water supply development, and TMDL studies Expertise of the SMG team includes hydrodynamics, computational fluid dynamics, hydrology, limnology, oceanography, water chemistry, aquatic ecology, and information technology These disciplines are essential to developing and applying mathematical models for watershed, waterbody, and ecosystem -scale simulation Selection of Clients • Electric utilities • Public agencies • Petroleum industry • Paper mills • Mining industry • Harbor and waterway authorities • Marine insurance firms Delivering sustainable solutions in a more competitive world ERM Temperature (C) August 1977 195 3 _ aoo �A 19A 266 �4 1853 a0 20A t60 65 60 1753 155 tl li0 145 k35 165 3 too u 0 20000 45000 70000 95000 Duca— ¢tang the slice, —1— CE-QUAL-W2 Model Apphcation to Lake Mohave, CA ERM's Surfacewater Modeling Group (SMG) is an internationally -recognized group of surface water professionals supporting clients since 1976 The group specializes in modeling and analysis of watersheds, rivers, lakes, reservoirs, estuaries and coastal waterbodies Model applications are made in support of thermal plume investigations, point source discharge permits, optimization of cooling water facilities, oil spill damage assessments, PRP litigation, reservoir water quality studies, water supply development, and TMDL studies Expertise of the SMG team includes hydrodynamics, computational fluid dynamics, hydrology, limnology, oceanography, water chemistry, aquatic ecology, and information technology These disciplines are essential to developing and applying mathematical models for watershed, waterbody, and ecosystem -scale simulation Selection of Clients • Electric utilities • Public agencies • Petroleum industry • Paper mills • Mining industry • Harbor and waterway authorities • Marine insurance firms Delivering sustainable solutions in a more competitive world ERM Ere Em Ws ti u Gm � tl-1 ➢ww Ie Y. 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I Themo properD°s GEMSS Software Interface � ungne O ® x I r .s»m9rt z sranox xa �o Theme Attribute Tables _J GEMSS — SMG's Comprehensive Modeling Software SMG has encapsulated many of its analysis techniques in the software system GEMSS, (Generalized Environmental Modeling System for Surfacewaters) At the heart of the system are four hydrodynamic modules the 3-1) model GLLVHT, the 2-D longitudmal-vertical model CE -QUAL -W2, the 1-D model GLHT, and the fully -mixed model RTC Specialized fate modules include: • Hydrodynamic and Transport - HDM • Water Quality Module - WQM • Toxics Module - TOX • Sediment Transport Module - STM • Particle Tracking Module - PTM • Chemical and Oil and Spill Module - COSIM • Entramment Module - ENM • 1D Module -1DM • CE -QUAL -W2 Module - W2M • Generalized Bacteria Module - GBM • User Constituent Module - UCM Enera Tmtw"aafe"C 12 11 19 0 6 7 J 6 5 4 J 2 1 \1 Connecticut Yankee Thermal Plume Modeling GEMSS has had extensive application experience and has been accepted by many regulatory agencies including the NRC, EPA, the World Bank, and state agencies such as NJDEP and DNREC and others e . Ere Ear Y.• `✓� tleb I❑ m � �J ss �®q Q'� � 'a a r�l�il�x,l©Itsitalr�.I�J � ra r��I_ ms � (��� � iE.eee.rmpuW..d.p FiXar 3G I9990G:GG:OO�D ViLLVXTWp.V.md.IADuW iDaa°ase: runl3ifl.Na.�di x � J'sr VoL� Salinity pp[ as,� rarvpu Vj • 9aFppp{ Surfdre CODtour F, Feogemmtd it TaryeltlueF d � Era.. �empeem. aepF 9eGry {p �, a VCR W Y ' _ I Pra.—t iD+� Profiles FT, 3G,999mo¢m �• r �' Emenw.A End: 5l.W/99 11:mmt 05r3GI1 ExGe95 temperature deg F Longeudmal Sura SI.- 1,n) lues- rDrp osu5np Temperewru F . Peaty 23r5G6 9°2a1G5--(�—j GEMSS Output Data Visualizer GEMSS itself is a graphical user interface that supports these modules and provides additional capabilities, including Contact: Venkat S. 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GEMSS includes a grid generator and editor, control file generator, 2-D and 3-D post processing viewers, and an animation tool It uses a database approach to store and access model results The database approach is also used for field data, as a result, the GEMSS viewers can be used to display model results, field data or both, a capability useful for understanding the behavior of the prototype as well as for calibrating the model The field data capability can be used independently of the model application GEMSS was developed in the mid -80s as a hydrodynamic platform for transport and fate modeling The hydrodynamic platform ("kernel") provides 3-D flow fields from which the distribution of various constituents can be computed The constituent transport and fate computations are grouped into modules GEMSS modules include hydrodynamics, water quality, sediment transport, particle tracking, oil and chemical spills (the Chemical / Oil Spill Impact Module, COSIM), entrainment, and toxics. The theoretical basis of the hydrodynamic kernel of GEMSS is the three-dimensional Generalized, Longitudinal -Lateral -Vertical Hydrodynamic and Transport (GLLVHT) model which was first presented in Edinger and Buchak (1980) and subsequently in Edinger and Buchak (1985) The GLLVHT computation has been peer reviewed and published (Edinger and Buchak, 1995, Edinger, et al , 1994 and 1997). The kernel is an extension of the well known longitudinal -vertical transport model written by Buchak and Edinger (1984) that forms the hydrodynamic and transport basis of the Corps of Engineers' water quality model CE -QUAL -W2 (U S. Army Engineer Waterways Experiment Station, 1986) The constituent modules as well as the GIS interoperability, the visualization tools, the graphical user interface (GUI), and the post -processors have been developed by Kolluru et al (1998, 1999, 2003a; 2003b) 1Vd1117_A9101Z COSIM was recently used during a mayor U S oil spill in Buzzards Bay, Massachusetts During a Natural Resource Damage Assessment (NRDA) to assess potential impacts resulting from a release of No 6 Fuel Oil from a fuel barge, COSIM was used on behalf of the responsible party in a cooperative assessment with the U S National Oceanic and Atmospheric Agency (NOAA) NOAA is one of the world's leading agencies for managing oil spill responses and assessing spill -related impacts When use of one of NOAA's in-house models, NRDAM/CME, was refected by NOAA in response to demands for the best state-of-the-art oil spill model be implemented, NOAA agreed to allow SIMAP (by the trustees) and COSIM (by the responsible party) to be run in parallel Thus the aquatic injury assessment was performed concurrently with COSIM and SIMAP to form a consensus model, facilitating the cooperative process The model was successfully calibrated to field observations, shoreline oiling was delineated and potential aquatic injuries associated with the oil's dissolved aromatic hydrocarbons in the water column and nearshore were assessed. COSIM results have been verified through comparisons to field observations for use in other mayor oil spills including a rupture in a river in Maryland and a barge leak off the coast of California GEMSS and its component modules have met agency approval in the U S and Canada many times since 1981 GEMSS-based studies have been accepted by the U S Environmental Protection Agency (EPA), several U S state agencies including California, Massachusetts, Pennsylvania, Louisiana, Texas and Delaware Washington State's Department of Ecology has adopted GEMSS as their standard tool for estuarine and water quality modeling Most recently GEMSS has been published as a recommended three-dimensional hydrodynamic and water quality model in studies funded by EPA (HGL and Aqua Terra, 1999) and by the Water Environment Research Foundation (Water Environment Federation, 2001) It is the sole hydrodynamic model listed in its WERF model selection tool database for hydrodynamic and chemical fate models that can do 1-D, 2-D, and 3-D time -variable modeling for most waterbody types, all state variables, for near field and far field simulations, with GUIs, grid generation, GIS linkage, and strong documentation Outside the U S, GEMSS and its various software modules have been approved by many regulatory agencies as well Studies conducted using the hydrodynamic (GEMSS-HDM) and thermal analysis (GEMSS-TAM) modules were approved by the regulatory agency in the State of Bahamas Similar studies using the same modules were also approved by the regulatory agency in the State of Qatar Spill impact studies conducted using the COSIM module of GEMSS were also approved by the regulatory agency in the State of Qatar Studies conducted using the water quality (GEMSS-WQM) module of GEMSS was approved by the overseeing regulatory agency in India GEMSS-HDM and GEMSS-WQM modules were recently applied to study the hydrodynamic mixing and water quality of the confluence of the Nottawasaga River with Nottawasaga Bay in Ontario, Canada The model results were accepted by the Lake Simcoe Region Conservation Authority of Ontario, Canada. Buchak, E M and J E Edinger 1984. Generalized, Longitudinal -Vertical Hydrodynamics and Transport Development, Programming and Applications Prepared for U S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, Miss Contract No DACW39-84-M-1636 Prepared by J. E. Edinger Associates Wayne, PA Document No 84-18-R June. Edinger J.E , J Wu and E M Buchak 1997 Hydrodynamic and Hydrothermal Analyses of the Once -through Cooling Water System at Hudson Generating Station Prepared for Public Service Electric and Gas (PSE&G) Prepared by J E Edinger Associates, Inc, June 1997 Edinger, J E and E M. Buchak. 1980 Numerical Hydrodynamics of Estuaries in Estuarine and Wetland Processes with Emphasis on Modeling, (P Hamilton and K B. Macdonald, eds) Plenum Press, New York, New York, pp. 115-146 Edinger, J E and E. M. Buchak 1995 Numerical Intermediate and Far Field Dilution Modelling Journal Water, Air and Soil Pollution 83, 147-160,1995. Kluwer Academic Publishers, The Netherlands Edinger, J E., and E M Buchak 1985 Numerical Waterbody Dynamics and Small Computers Proceedings of ASCE 1985 Hydraulic Division Specialty Conference on Hydraulics and Hydrology in the Small Computer Age American Society of Civil Engineers, Lake Buena Vista, FL Aug 13- 16 Edinger, J E, E M Buchak, and M D. McGurk 1994 Analyzing Larval Distributions Using Hydrodynamic and Transport Modelling Estuarine and Coastal Modeling III American Society of Civil Engineers, New York HGL and Aqua Terra 1999 Selection of Water Quality Components for Eutrophication-Related Total Maximum Daily Load Assessments Task 4. Documentation of Review and Evaluation of Eutrophication Models and Components EPA Contract Number 68-C6-0020 Work Assignment No 2-04 Prepared by HydroGeoLogic, Inc Herndon, VA 20170 and AQUA TERRA Consultants, Mountain View, CA June Kolluru, V S , E M. Buchak and J. E Edinger, 1998 "Integrated Model to Simulate the Transport and Fate of Mine Tailings in Deep Waters," in the Proceedings of the Tailings and Mine Waste'98 Conference, Fort Collins, Colorado, USA, January 26-29 Kolluru, V S, E M Buchak, J Wu, 1999. "Use of Membrane Boundaries to Simulate Fixed and Floating Structures in GLLVHT " In Spaulding, M.L, H L Butler (eds.) Proceedings of the 6th International Conference on Estuarine and Coastal Modeling pp 485 — 500. Kolluru, V S, J E Edinger, E M Buchak and P Bnnkmann 2003 "Hydrodynamic Modeling of Coastal LNG Cooling Water Discharge " Journal of Energy Engineering. Vol 129, No 1, April 1, 2003 pp 16 — 31 Kolluru, V S and Mike Fichera, 2003 "Development and Application of Combined 1-D and 3-D Modeling System for TMDL Studies." Proceedings of the Eighth International Conference on Estuarine and Coastal Modeling American Society of Civil Engineers. pp. 108-127, 2003 U S Army Engineer Waterways Experiment Station, Environmental Laboratory, Hydraulics Laboratory 1986 CE-QUAL-W2 A Numerical Two-Dimensional, Laterally Averaged Model of Hydrodynamics and Water Quality, User's Manual Instruction Report E-86-5 Prepared for Department of the Army, U S Army Corps of Engineers, Washington, DC. Final Report August Water Environment Federation 2001 Water Quality Models. A Survey and Assessment Order No D13209WW (Electronic Media) .,O`aOF W AT �9QG G 5: Mr. Robert E Beasley, Manager Mayo Steam Electric Plant Progress Energy Carolinas, Inc 10660 Boston Road Roxboro, NC 27574 Dear Mr Beasley. May 30, 2006 3831% Michael F Easley, Governor William G Ross Jr , Secretary North Carolina Department of Environment and Natural Resources Alan W Klimek, P E Director Division of Water Quality The Division of Water Qualityhas receive nd reviewed the 2005 Environmental Monitoring Report for the Mayo Steam Electric Plant, NPDES Permi NC003877, I Person County, as required by that permit Environmental Sciences Section staff agree with your summary letter dated April 27, 2006 that the operational effects of the plant continue to be minimal The fish community of this low productivity reservoir is dominated by bluegill and largemouth bass, as has been the case with prior monitoring We agree that current sampling methods -should help determine whether the newly collected blueback herring will affect native fish populations through predation of eggs and larvae We have no questions at this time Sincerely, Jim rton Section Chief cc Shannon Langley, Raleigh Regional Office Tom Belnik, Central Office Central Files l L� �• J U N 6 2006 DENR - WATER QUALITY POINT SOURCE BRANCH None Carolina NQt1lC lly North Carolina Division of Water Quality 1621 Mail Service Center Raleigh, NC 27699-1621 Phone (919) 733-9960 Customer Service Environmental Sciences Section 4401 Reedy Creek Rd Raleigh, NC 27607 FAX (919) 733-9959 1-877-623-6748 http //www ncwaterquality.org/esb An Equal Opportunity/Affirmative Acton Employer — 50% Recycled/10% Post Consumer Paper Pro ress Ener -� 9 9Y File No 12520 B-1 Mr David Goodrich North Carolina Department of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Subject Date Feb 23, 2006,"" !`\ 0b CP&L d/b/a Progress Energy Carolinas, Inc. (PEC) Mayo Electric Generating Plant NPDES Permit No NCO038377 NPDES Permit Modification - Flue Gas Desulfurization Wastewater Dear Mr. Goodrich- ,= - Progress Energy is planning on installing Flue Gas Desulfurization (FGD) systerwi at several of our coal-fired plants in North Carolina in response to the North Carolina Clean Air Initiative A FGD system will be installed at Mayo Steam Electric Plant with operation projected to begin in the second quarter of 2009 The FGD system removes SO2 by mixing the flue gas with a limestone slurry producing gypsum Blowdown from the FGD operation will be produced Solids bP removed from the blowdown stream prior to entering a bioreactor which utilizes microbes to re uce soluble contaminants to insoluble forms that t en precipitate from solution. The ioreactors are designed with back washing capabilities or a periodic removal and recovery of collected contaminants The discharge from the bioreactors will enter the ash pond secondary settling pond and will discharge via Outfall 002 to Mayo Lake Because of the addition of the FGD blowdown, PEC is amending the NPDES permit application to include this new wastewater stream According to our schedule we will need a permit issued by August 1, 2006 Enclosed are revised Attachments 2 and 3 of the NPDES permit application, Potential Discharges Not Covered By Analysis table revised to include Limestone, and a table with expected flow and concentrations of parameters in the wastewater stream prior to treatment by the bioreactors In addition, a summary report titled ABMETO Selenium Removal From FGD Scrubber Blowdown is enclosed which describes the wastewater treatment process that will be used for the blowdown wastewater stream Also enclosed is a check for $860 00 for the permit modification fee If you have any questions regarding any information in this submittal please call Louise England at (919) 546-6318 1 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 1 am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations Sincerely, Robert E Beasley — Manag Z5 Progress Energy Carolinas, Inc Mayo Electric Generating Plant Mayo Steam Plant 10660 Boston Road Roxboro, NC 27574 a ,= - Progress Energy is planning on installing Flue Gas Desulfurization (FGD) systerwi at several of our coal-fired plants in North Carolina in response to the North Carolina Clean Air Initiative A FGD system will be installed at Mayo Steam Electric Plant with operation projected to begin in the second quarter of 2009 The FGD system removes SO2 by mixing the flue gas with a limestone slurry producing gypsum Blowdown from the FGD operation will be produced Solids bP removed from the blowdown stream prior to entering a bioreactor which utilizes microbes to re uce soluble contaminants to insoluble forms that t en precipitate from solution. The ioreactors are designed with back washing capabilities or a periodic removal and recovery of collected contaminants The discharge from the bioreactors will enter the ash pond secondary settling pond and will discharge via Outfall 002 to Mayo Lake Because of the addition of the FGD blowdown, PEC is amending the NPDES permit application to include this new wastewater stream According to our schedule we will need a permit issued by August 1, 2006 Enclosed are revised Attachments 2 and 3 of the NPDES permit application, Potential Discharges Not Covered By Analysis table revised to include Limestone, and a table with expected flow and concentrations of parameters in the wastewater stream prior to treatment by the bioreactors In addition, a summary report titled ABMETO Selenium Removal From FGD Scrubber Blowdown is enclosed which describes the wastewater treatment process that will be used for the blowdown wastewater stream Also enclosed is a check for $860 00 for the permit modification fee If you have any questions regarding any information in this submittal please call Louise England at (919) 546-6318 1 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 1 am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations Sincerely, Robert E Beasley — Manag Z5 Progress Energy Carolinas, Inc Mayo Electric Generating Plant Mayo Steam Plant 10660 Boston Road Roxboro, NC 27574 .T Progress Energy Carolinas, Inc Mayo Electric Generating Plant FGD Blowdown Estimated Concentrations The flowrate of the FGD blowdown will be approximately 0 253 MGD Parameter Estimated FGD Blowdown Concentration m P,- OIL Antimony 0 044 — Arsenic (Caws) 0 039 Barium 2 519 Beryllium 0 025 Boron 0 079 Cadmium 0 008 S( Chloride 16,000 23o G Chromium 0 121 oZ'L Cobalt 0 077 Copper 0 072 3 (" Fluoride 184 Lead 0 079 33. S '` Manganese 145 Mercury Molybdenum 0 038 1 29 Nickel 0 576 2 �� Selenium 548 Thallium 0 008 o, 3 W Vanadium 0 065 2.q (wS Zinc 369 6 1 YJA s.l ,A.,I L (9'A-, LvO bb 6S tia-C fL) �P�+ 6S EVA f Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NC0038377 Attachment 2 Form 2C - Item II -A Flows, Sources of Pollution, and Treatment Technologies Stream Estimated Average Flow Comments 1 14 MGD Make up water from Mayo Reservoir 2 13 7 MGD Cooling Tower make up Maximum rate is 23 7 MGD 3 0 36 MGD Raw Water treatment 4 0 002 MGD Sewage treatment plant 5 0 00175 MGD Raw water treatment backwash 6 0 36 MGD Treated water to water storage 7 300 GPM (Max rate) Oily waste (infrequent) to ash pond 8 1 5 MGD Low volume waste to ash pond 9 0 05 MGD at start up Boiler blowdown to ash pond 10 2 MG/event 1/yr Cooling Tower basin drain to Mayo Reservoir 11 9 MGD Evaporation from Cooling Tower 12 5 MGD Ash Transport 13 Variable as needed (blowdown) Intermittent blowdown of circulating water from heat exchangers 14 8 5 MGD (recirculating flow) Heat exchanger (primary route) 15 0 0135 MGD (annual daily average) Coal pile Runoff 16 7 3 MGD Ash Pond discharge to Mayo Reservoir 17 Variable as needed Secondary containment for anhydrous ammonia tanks 18 2 1 MGD During Cooling Tower out of service Heat exchanger (secondary route) 19 0 253 MGD FGD Blowdown 2 Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NCO038377 Form 2C — Item VI — Potential Discharges Not Covered By Analysis Chemical Estimated Average Frequency Purpose Annual Usage Aluminum sulfate 1,000 gals Continuous Improve clarifier floc Polymer 50 lbs. Continuous Improve clarifier floc Sulfuric acid 93% 79,000 lbs. As required Demineralizer regeneration Sodium hydroxide 170,000 lbs. As required Demineralizer regeneration Sodium molybdate 1,100 lbs. As required Corrosion control Aqua ammonia 25,000 lbs. Continuous Boiler water pH control Sodium bicarbonate 1,300 lbs. As required Sewage plant pH control Sodium 100 gals. Continuous Potable water hypochlorite disinfectant Polyphosphate 55 gals. Continuous Corrosion control 15 % Sodium 100 gals. Continuous pH control hydroxide Potable water Water based non- 7,000 lbs As required Biofouling control oxidizing agent Cooling tower Silicone based 3,900 lbs. As required Defoamer treatment defoamer Cooling tower Dispersant (acrylic 17,000 lbs. As required Biofouling control acid polymer) Cooling tower Anhydrous 450,000 gals. As required Air pollution Ammonia treatment system Sulfuric acid 50,000 lbs As required pH control in ash pond Sanuril Chlorine 100 lbs Continuous Sewage plant Tablets effluent treatment Limestone (Calcium 270,400 tons Continuous Flue Gas Carbonate) Desulfuization Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NC0038377 Attachment 3 Form 2C - Item II -B Flows, Sources of Pollution, and Treatment Technologies The Mayo Electric Generating Plant is a coal-fired electric generating plant with one unit rated at a maximum dependable capacity of 745 mw The plant is located in Person County, North Carolina and uses No 2 fuel oil for start up and stabilization of the boiler flame Water is withdrawn from the Mayo Reservoir as required to make up evaporative losses from the cooling tower, boiler water and drinking water needs Makeup pumping rates from the reservoir are highly variable depending upon natural weather conditions, generation load, plant operations, and evaporative loss Chemical constituents contained in the discharges from this facility will, in part, be representative of the naturally occurring chemical quality of the intake water The discharges will also have chemical constituents of such quality and quantity associated with similar discharges for fossil generating facilities of this size, type, and in this geographical location Either all or part of the elements enumerated in the Periodic Table, either singularly or in any combination, may from time to time be contained in this discharge. More detailed descriptions of the individual discharges described below OUTFALL 001 - COOLING TOWER SYSTEM Approximately once per year the cooling tower basin and circulating water system is drained by gravity The majority of the water drains to the ash pond with approximately 2 MG draining to the reservoir to dewater the system for maintenance That discharge to the reservoir is monitored and reported to the state through the monthly Discharge Monitoring Report (DMR) OUTFALL 002 —ASH POND TREATMENT SYSTEM The ash pond receives ash transport water, coal pile runoff, storm water, cooling tower blowdown, and various low volume wastes such as boiler blowdown, oily waste treatment, wastes/backwash water from water treatment processes, plant area wash down water, and equipment heat exchanger water The sewage treatment plant also discharges to the ash pond The ash pond provides treatment by sedimentation, oxidation, neutralization, equalization, and adsorption A standpipe allows for overflow release to a small secondary -settling basin for release into Mayo Reservoir Due to alga blooms, the pH of ash pond discharge canal is adjusted at the standpipe as needed Ash Transport Water — Water for sluicing fly ash and bottom ash to the ash pond is withdrawn from the closed circulating water system Some fly ash is handled dry by a pneumatic system and is transported off site The water in the closed circulating water system is treated with a dispersant for protection of the cooling tower fill Coal Pile Runoff — The coal pile runoff is routed to the ash pond Flow volumes are related to rainfall frequency and intensity The annual daily average flow presented previously is based on a coal pile area of 5 acres, an annual average rainfall of 44 inches and a runoff coefficient of 1 0 Cooling Tower Blowdown — Normally, ash transport water withdrawal from the closed circulating water system is sufficient to control total dissolved solids (TDS) in the cooling water During periods of maintenance, some molybdate waste from the closed cooling water system is routed to the ash pond Also during periods of maintenance, the cooling tower basin is drained to the reservoir r Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NC0038377 Low Volume Wastes — Oily Wastes — Drains containing oily wastes or water are routed to the oily waste basin The discharge from the oily waste basin is routed through the oil—water separator where the oil is removed and contained The treated water is then discharged to the ash pond The fuel oil storage tank is in a containment area with a valved drain The drain is routed to the oily waste basin. Boiler Blowdown — Boder make-up water is withdrawn from the lake, treated by various processes and stored in tanks until needed The boiler water is treated with ammonia continuously when the boilers are in service Sodium hydroxide is used when needed during abnormal conditions Boder blowdown is routed to the ash pond via the low- volume waste conveyance Water Treatment Wastes — Water is withdrawn from the lake and is treated by clarification, sand filtration, carbon filtration, and demineralization Various wastes such as filter backwash, and spent regeneration chemicals such as sulfuric acid and sodium hydroxide are routed to the ash pond via the low volume waste conveyance Miscellaneous — Other miscellaneous sources such as wash down water, water from various plant drains, secondary containment drains, laundry activity and temporary hand washing stations are routed to the ash pond via the low volume waste conveyance Miscellaneous equipment heat exchanger water can be routed to the ash pond via the alternate cooling tower blowdown line if needed The air preheaters are water washed infrequently Then the air preheaters wastewater is discharged to the ash pond Sewage Treatment Plant (STP) — Sanitary wastes are treated on-site by an extended aeration treatment plant. The plant is designed for 0 0125 MGD and consists of a screen, comminuter, surge tank, aeration tank, clarifier, chlorine contact chamber, and a sludge holding tank Flow from the system is dependent upon fluctuating demand due to variations in the number of personnel on site When needed, residuals are disposed of off-site by a licensed contract disposal firm The STP is routed to the ash pond via the alternate cooling tower blowdown line Flue Gas Desulfurization Blowdown — The Flue Gas Desulfurization (FGD) system directs flue gas into an absorber where limestone (calcium carbonate) slurry is sprayed Sulfur dioxide in the flue gas reacts with the limestone slurry to produce calcium sulfate (gypsum) This system reclaims any unreacted limestone slurry to be reused in the absorber. A small blowdown stream is used to maintain the chloride concentration in the reaction tank The blowdown stream will be discharged to a gypsum settling pond where suspended solids will be reduced prior to entering a bioreactor The bioreactor utilizes microbes to reduce soluble contaminants to insoluble forms that then precipitate from solution The treated wastewater will enter the ash pond secondary settling pond prior to outfall 002 Ash Sluice Water Fly ash and bottom ash is hydraulically conveyed by an ash sluice pipeline to the ash pond Water for the transport of ash is withdrawn from the closed circulating water system Some fly ash is handled dry by a pneumatic system and transported off site The water in the closed circulating system is treated with a dispersant (acrylic acid polymer) and water based non - oxidizing agent for protection of the cooling tower fill 2 ti Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NC0038377 Ash Management and Reclamation From time to time fly and bottom ash in the ash pond may be stacked or relocated within the diked boundary of the ash pond system. As this pond management activity does not alter the chemical character of the pond contents, no change in the nature of the discharge to the ash pond is anticipated In the event a practicable market becomes available, Progress Energy may exercise the option of reclaiming ash from the ash pond system In consideration of the scope of such an operation, no additional discharges are expected to result from ash reclamation efforts. Herbicide and Pesticide Usage in the Treatment System Pond Herbicides may be used as needed to control nuisance aquatic vegetation These herbicides are applied by licensed applicators, or persons under the immediate supervision of a licensed applicator, in accordance with the manufacturer's instructions Pesticides may be used as needed to perform biological assessments These Pesticides are applied by licensed applicators, or persons under the immediate supervision of a licensed applicator, in accordance with the manufacturer's instructions OUTFALL 008 — COOLING TOWER BLOWDOWN DISCHARGE TO ASH POND Ash that is routed to the ash pond is hydraulically conveyed to the ash pond using cooling tower blowdown (closed circulating system) The water in the closed circulating system is treated with a dispersant (acrylic acid polymer) and water based non -oxidizing agent for protection of the cooling tower fill STORMWATER RUNOFF Outfall 004 — Drainaae from Outside Storage Area Outfall 004 is located on the northeast side of the plant site and drains to the reservoir, using catch basins, storm sewer and vegetative conveyance The industrial activity drained to this outfall is primarily the facility's outside storage area including a loading dock Materials that are not weather sensitive are stored in this area These include empty lubricant drums, structural steel, pipes, and some large equipment parts Virtually the entire area is loose gravel, except for the concrete unloading dock There is a storage shed in the back of the outside storage area This shed contains any chemicals or ods that would be stored in the area The hazardous waste central storage area is located in this same shed Sometimes during construction projects, a portion of the outside storage area is utilized for material storage which could consist of additional structural steel Due to mobile equipment utilization there is a potential for petroleum release Outfall 005 — Drainage from Industrial Area — Main Outfall 005 is located on the northeast side of the facility and is the end point of the plant's primary storm sewer system that drains the "power house block" of the plant using catch basins, storm sewer and vegetative conveyance Including the area around the boilers and turbine buildings (both are open, no roof or walls), precipitators, and the roofs of the machine shops, administrative buildings, warehouse, parking lot, and miscellaneous support facilities, such as the water supply treatment, ash storage silo, SCR and transformers Also draining to this outfall through sewers is the grassed area intended for Unit 2 at some time in the future The grassed Unit 2 area is sometimes utilized for fabrication of structural steel for construction / maintenance projects This r4 Progress Energy Carolinas, Inc. Mayo Electric Generating Plant National Pollutant Discharge Elimination System Permit Number NC0038377 area consists of gravel and grass areas For outfall 005 the potential pollutants could be coal, coal ash, sediment, and the chemical make-up of the rain water Due to mobile equipment utilization there is a potential for petroleum release Outfall 006a, b, c, d, e, - Cooling Tower Area Outfall 006 is located at the eastern end of the site and drains the area around the cooling towers, including the roof of the chemical feed building and associated roads and parking areas using catch basins, storm sewer and vegetative conveyance. In the cooling tower area, there are five separate outfalls These outfalls involve catch basins and storm sewers that drain to swales and then to reservoir The cooling tower itself has a basin for re -circulating cooling water and therefore, does not directly contribute to storm water runoff For this outfall the potential pollutants could include sediment, mist from the cooling tower and chemical make-up of the rainwater. A malfunction of the cooling tower basin level and / or the cooling tower make-up system could result in a potential release of cooling tower water Due mobile equipment utilization there is a potential for petroleum release On rare occasions herbicides are used for ground maintenance at the cooling towers 4 APPENDIX C - PILOT PLANT METAL REMOVAL DATA ZENON CONFIDENTIAL 24 y. uwavior-comain. roarmu--i : ' i,=. . in=ut Arsenic (uA/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 14.1 15.8 < 7.5 12/22/04 9 13.1 < 7.5 12/27/04 23.2 <7.5 <7.5 1/12/05 <7.5 <7.5 <7.5- 1/19/05 19 <7.5 <7.5 2/2/05 48.9 33.7 15.2 2/10/05 53.7 14.1 <7.5 2/16/05 16.9 <7.5 <7.5 Antimony (uA/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 1.42 <0.40 0.88 12/22/04 4.78 <0.40 3.04 12/27/04 <0.40 <0.40 0.72 1/12/05 3.85 <0.40 <0.40 1/19/05 1.43 <0.40 <0.40 2/2/05 4.1 <0.40 <0.40 2/10/05 2.26 <0.40 <0.40 2/16/05 2.59 1.68 <0.40 Barium (uq/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 153 93 388 12/22/04 475 506 634 12/27/04 282 68.1 261 1/12/05 520 534 526 1/19/05 324 308 385 2/2/05 366 346 345 2/10/05 456 424 391 2/16/05 730 521 517 ZENON CONFIDENTIAL 25 av Bervllium (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 <1.0 2.4 38.1 12/22/04 1.4 9.5 82.1 12/27/04 <1.0 1.4 13.7 1/12/05 1.2 26.7 7.5 1/19/05 1.2 2.5 15.2 2/2/05 <1.0 1.2 2.6 2/10/05 1.4 1.2 1.6- 2/16/05 1.5 4.5 3.3 Chromium (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 16.1 <3.5 6.1 12/22/04 19.3 8.4 8.5 12/27/04 56.8 6.5 7.5 1/12/05 10.5 11.3 10.9 1/19/05 16.1 6.8 6.1- 2/2/05 6 7.2 6.4 2/10/05 6.8 10.4 7.8 2/16/05 14.9 10.5 10.3 Cobalt (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 3.3 <2.5 21.8 12/22/04 185 6.2 24.8 12/27/04 12.3 < 2.5 5.7 1/12/05 183 5.2 5.8 1/19/05 72.6 5.1 5.1 2/2/05 111 5.5 5.7 2/10/05 120 6.4 5.7 2/16/05 166 47.5 18.1 ZENON CONFIDENTIAL Mel Copper (uq/L) T,t Date Influent Bioreactor 1 Bioreactor 2 12/17/04 288 14.1 2.2 12/22/04 278 20.4 10.4 12/27/04 701 20.3 53.6 1/12/05 128 10.1 8.2 1/19/05 460 13.5 13.2 2/2/05 297 10.1 11.9 2/10/05 242 12.9 17.5 2/16/05 312 219 11.7 Lead (uq/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 73.4 <0.75 <0.75 12/22/04 23.4 <0.75 0.91 12/27/04 169 1.14 0.92 1/12/05 24.4 1.34 1.05 1/19/05 324 308 385 2/2/05 10.2 1.46 0.9 2/10/05 2 5. 6 14.5 <0.75 2/16/05 11.2 2.41 2.07 Manganese (uq/L) Date Influent Bioreactor 1 Bioreactor 2 1/12/05 61600 62000 64400 1/19/05 33000 53600 63800 2/2/05 29700 32800 37200 2/10/05 35600 38500 35600 2/16/05 52300 42700 44500 ZENON CONFIDENTIAL 27 4 l Mercury (no/L. Dot) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 3260 134 61.6 12/22/04 2100 184 113 12/27/04 10300 70.3 54.6 1/12/05 120 173 121 1/19/05 1730 110 85 2/2/05 82.9 37.7 39.9 2/10/05 280 63 67.4 2/16/05 1910 970 69.5 Molvbdenum (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 3.8 <1.0 1.9- 12/22/04 81.8 <1.0 1.3 12/27/04 8 <1.0 < 1.0 1/12/05 68.4 <1.0 <1.0 1/19/05 22.7 <1.0 <1.0 2/2/05 57.7 <1.0 <1.0 2/10/05 47.7 <1.0 <1.0 2/16/05 42.6 11.3 <1.0 Silver (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 1.17 <0.75 <0.75 12/22/04 7.61 <0.75 6.54 12/27/04 7.22 0.78 0.79 1/12/05 <0.75 <0.75 <0.75 1/19/05 <0.75 <0.75 <0.75 2/2/05 <0.75 <0.75 <0.75 2/10/05 <0.75 <0.75 <0.75 2/16/05 <0.75 <0.75 <0.75 ZENON CONFIDENTIAL w Vanadium (ua/L) 0,6 Date Influent Bioreactor 1 Bioreactor 2 1/12/05 60 67.7 76.4 1/19/05 38.3 48 62.4 2/2/05 35.3 36.5 42.8 2/10/05 42.1 52.4 58.4 2/16/05 128 132 114 Zinc (ua/L) Date Influent Bioreactor 1 Bioreactor 2 12/17/04 129 44 34 12/22/04 576 34 49.8 12/27/04 217 53.6 12.3 1/12/05 438 11.2 0 1/19/05 296 34.1 17.7 2/2/05 423 17.2 19.1 2/10/05 385 26.1 17.7 2/16/05 552 357 28 ZENON CONFIDENTIAL 29