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HomeMy WebLinkAboutNC0076775_Permit (Issuance)_20070718NPDES DOCYNENT SCANNING COVER SHEET NPDES Permit: NC0076775 Falls Powerhouse Document Type: Permit Issuance »..nt Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Staff Report Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: July 18, 2007 This document is printed on reuse paper - ignore any content on the resrerse side Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality July 18, 2007 Mr. Mark J. Gross Vice President of Operations P.O. Box 576 Badin, North Carolina 28009 Subject: Issuance of NPDES Permit NC0076775 Falls Powerhouse Stanly County Dear Mr. Gross: Division personnel have reviewed and approved your application for modification 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 the following changes from your current permit: > A stormwater discharge outfall (008) has been added. See Effluent Limitation and Monitoring Requirements A. (3.). > A special condition for Best Management Practices (BMP) for stormwater discharge from the secondary containment around the transformer has been added. See Condition A. (4.). Alcoa is required to report all stormwater discharge events along with the annual Discharge Monitoring Report (DMR). 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 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 Agyeman Adu-Poku at telephone number (919) 733-5083, extension 508. Sincerely, Coleen H. Sullins cc: Central Files NPDES File ; Mooresville Regional Office / Surface Water Protection I�"o �`ttCarolina /Vatura!!y North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-7015 Customer Service Internet: www.ncwaterouality.ora Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax (919) 733-2496 1-877-623-6748 An Equal OpportunitylAifinnaUve Action Employer — 50% Recycledll0% Post Consumer Paper Permit No. NC0076775 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, Alcoa Power Generating, Inc. is hereby authorized to discharge wastewater from a facility located at Falls Powerhouse at the end of NCSR 1727 souteast of Badin, NC Stanly County to receiving waters designated as Yadkin River in the Yadkin -Pee Dee River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective September 1, 2007. This permit and authorization to discharge shall expire at midnight on January 31, 2009 Signed this day July 18, 2007. ;-.-Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit No. NC0076775 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. Alcoa Power Generating, Inc. is hereby authorized to: 1. Continue to discharge once -through cooling water from outfalls 001, 002, 003, 004, and 005 and water from a sump drain (Outfall 007) located at Falls Powerhouse, at the end of NCSR 1727, southeast of Badin, Stanly County, and 2. Stormwater Discharge System — The facility is permitted to periodically discharge stormwater from secondary containment for transformers through a stormwater conveyance system, an outfall 008 located at Falls Powerhouse, at the end of NCSR 1727, southeast of Badin, Stanly County 3. Discharge from said treatment works at the location specified on the attached map into the Yadkin River, which is classified as class WS-IV, and B CA waters in the Yadkin -Pee Dee River Basin. 1/ jhfr—";:s2i Facility Information tude: 35°23'44" gitude: 80°04'34" d #: FI8NE am Class: WS-IV and B eiving Stream: Yadkin River nitted Flow: N/A Sub -Basin: 03-07-08 Fac Loci worth Yadkin Enc. NC0076775 Fallc Pnwrrhn ca A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0076775 During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge once -through cooling water from outfall(s) serial number 001, 002, 003, 004, and 005. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS Flow (MGD� Temperature pH2 NOTES: 1 DISCHARGE LIMITATIONS Monthly Average Weekly Average 1 2 Sample Location: E — Effluent or at the point closest to discharge where The temperature of the effluent will be regulated so that the temperature temperature. In no case should the receiving stream temperature exceed downstream of the heat exchanger effluent that is representative of the di • Daily Maximum 1 Monitoring Requirements Effluent Measurement Frequency Annual Annual 2 Annual Sample Type ; , Sample Location* E a representative sample of the discharge can feasibly be obtained. Estimate Grab Grab of the receiving stream does not increase by more than 2.8 °C above the natural water 32 °C due to the facility's operation. Temperature of the effluent may be obtained anywhere scharge. E 1 2 The pH of the effluent shall not be less than 6.0 standard units nor greater than 9.0 standard units, unless ambient river conditions prevent compliance with this range. The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge. The permittee shall notify the Director in writing at least ninety (90) days prior to instituting the use of any additional additive in the discharge, which may be toxic to aquatic life (other than additives previously approved by the division). Such notification shall include the completion of a Biocide Worksheet Form 1.01 (if applicable), a copy of the MSDS for the additive, and a map indicating the discharge point and receiving stream. Monitoring results obtained during the calendar year shall be recorded and reported on a Discharge Monitoring Report (DMR) form and postmarked no later than January 30th following the completed reporting period. The first DMR is due January 30' 2008. Samples obtained for monitoring purposes may be collected anytime during the calendar year. There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless ambient rive: conditions prevent compliance. A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0076775 During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 007 — Sump Drain. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTIC Flow Oil and Grease' pH2 DISCHARGE,LIMITATIO1 :Monthly Average`; 15 mg/1 Weekly Average Daily Maximum 20 mg/1 Monitoring Requirements ifiluent Measurement • Frequency Sample Type Sample Location* Annual Annual Annual Estimate Grab Grab E NOTES: * Sample Locations: E — Effluent or at the point closest to discharge where a representative sample of the discharge can feasibly be obtained. 1 The tailrace shall be visually inspected for oil sheen attributed to facility operations on a weekly basis in conjunct:.on with inspections of the floor sump and rope skimmer. Confirmation that a visual inspection was conducted shall be recorded in the operating log for the facility and provided to the Division upon request. 2. There is no limit for effluent pH, however annual monitoring shall be required. Best Management Practices (BMPs) must be employed to ensure that excessive pollutants are not discharged to the surface water of the state. These practices should include as a mini: routine maintenance of the rope skimmer type oil/water separator and cleaning accumulated sediment in the bottom of the sump annually. Chemical wheel pit cleaning is permitted on a monthly basis. When wheel pit cleaning occurs, the tailrace shall be inspected visually for foam and oil. Cleaning shall be conducted only with pre -approved solvents. Should the Pernuttee wish to change solvents, a written request should be made to the Division including the MSDS for the proposed solvent. Mechanical cleaning operations, which do not contribute any wastewater to the discharge are not limited by this permit. Non -discharging cleaning operations may be conducted as often as necessary to ensure safety and proper facility operation. The Permittee shall obtain authorization from the Division prior to the use of any chemical additive (i.e. biocides) in the discharge. The permittee shall notify the Director it at least ninety (90) days prior to instituting the use of any additional additive in the discharge, which may be toxic to aquatic life (other than additives previously approved 1 division). Such notification shall include the completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for the additive, and a map indicating the disch and receiving stream. Monitoring results obtained during the calendar year shall be recorded and reported on a Discharge Monitoring Report (DMR) form and postmarked no later than January 30th following the completed reporting period. The first DMR is due January 30' 2008. Samples obtained for monitoring purposes may be collected anytime during the calendar year. There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless ambient river conditions prevent compliance. A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0076775 During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge stormwater water from outfall(s) serial number 008. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS " :i .. .. DISCHARGE LIMITATIONS -: ' Monitoring Requirements Monthly vera a Weekly' Average ' Y g : Daily:.M um . Effluent Measurement Frequency Q Y Sample a Sample Location BMP I NOTES: 1 See special condition A. (4). The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge. The permittee shall notify the Director in writing at least ninety (90) days prior to instituting the use of any additional additive in the discharge, which may be toxic to aquatic life (other than additives previously approved by the division). Such notification shall include the completion of a Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for the additive, and a map indicating the discharge point and receiving stream. There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless ambient river conditions prevent compliance. A. (4). Best Management Practices (BMP) for Periodic Stormwater Discharge The permittee is authorized by the Division to use Best Management Practices (BMP) at the stormwater discharge from the secondary containment around the transformers under the following conditions: • Designing sumps with underflow weirs/devices to prevent discharge of oily stormwater. • Weekly inspection of the transformers for leaks/drips of oil. • Routine preventive maintenance procedures to address any leaks/drips of oil • Inspection of the sump for the presence of oil as indicated by a visible sheen prior to discharge. • Maintaining a log of the time, date, and volume of stormwater discharge per discharge event. • Report all stormwater discharge events along with the annual Discharge Monitoring Report (DMR). Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality MEMORANDUM To: May 23, 2007 Britt Setzer NC DENR / DEH / Regional Engineer Mooresville Regional Office From: Agyeman Adu-Poku Western NPDES Program Subject: Review of Draft NPDES Permit NC0076775 Alcoa - Falls Powerhouse Stanly County Please indicate below your agency's position or viewpoint on the draft permit and return this form by June 23, 2007. If you have any questions on the draft permit, please contact me at the telephone number or e-mail address listed at the bottom of this page. RESPONSE: (Check one) §§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§ Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated effluent limits are met prior to discharge, and the discharge 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: No Carolina /atura!!ij North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-7015 Customer Service Internet: www.ncwaterqualitv.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax (919) 733-2496 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper The Stanly News & Press P.O. Box 488 Albemarle NC 28002 (704) 982-2121 AFFIDAVIT OF INSERTION DATE: 05/24/07 STARTDATE CLASS DESCRIPTION WORDS INS CHG 02100838-000 NCDENR/DWQ/NPDES 1617 MAIL SERVICE CENTER RALEIGH NC 27699-1617 05/24/2007 355 PUBLIC NOTICE STATE OF NORTH CAROLINA, STANLY COUNTY AFFIDAVIT OF PUBLICATION Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified, and authorized by law to administer oaths, personally appeared: SANDY SELVY, who being first duly sworn, deposes and says: that he is PUBLISHER of a newspaper known as THE STANLY NEWS AND PRESS, published, issued, and entered as second class mail in the City of Albemarle, in said County and State; that he is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in THE STANLY NEWS AND PRESS on the dates specified on the copy attached and that the said newspaper in which such notice, paper, document or legal advertisement was published was, at the time of each and every such publication, a newspaper meeting all of the requirements and qualifications of Section 1-597 of the General Statures of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statures of North Carolina. 322 2 90.16 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 other lawful standards and regulations, the North Carolina Environmental Manage- ment Commission proposes to issue a 512 N. Salisbury Street, Ra- National Pollutant Discharge Elimina- tion System (NPDES) wastewater dis- charge permit to the person(s)27604-1148 between the listed on file. below effective 45 days from the pub- lish date of this notice. Power Generating, Inc (PO Badin, NC 28009) has Written comments regarding the pro- posed permit will be accepted until 30 cation of NPDES permit days after the publish date of this no- '75 for the Falls Powerhouse tice. All comments received prior to that County. This permitted facility date are considered in the final deter- as once thorough cooling wa- mi- ump drain water to the Yadkin nations regarding the proposed permit. The Yadkin Pee -Dee River Ba- The Director of NC Division of Water ently oil adn grease water Quality may decide to hold a public meeting for the proposed permit should 1 This discharge may affect the Division receive a significant degree rations in this portion of the of public interest. 'ee-Dee River Basin. Copies of the draft permit and other supporting information on file used to determine conditions present in the draft permit are available upon request and payment of the costs of reproduc- tion, Mail comments and/or requests for information to the NC Division of Water Quality at the above address or call Ms. Frances Candelaria (919) 733- 5083, extension 520 at the Point Source Branch. Please include the NPDES permit number (attached) in any communication, Interested persons may also visit the Division of Water Sworn to r',.: this 24th day of May, 2007 2007. AtOi SHERRY FIANCE, Notary Public My commission expires April 27, 2011 To: NPDES Unit Water Quality Section Attention: Agyeman Adu-Poku Date: May 21, 2007 SOC Priority Project: No NPDES STAFF REPORT AND RECOMMENDATIONS County: Stanly NPDES Permit No.: NC0076775 PART I - GENERAL INFORMATION 1. Facility and address: Falls Powerhouse c/o Alcoa Power Generating Inc. Yadkin Division Post Office Box 576 Badin, N.C. 28009 2. Date of investigation: April 19, 2007 3. Report prepared by: Michael L. Parker, Environmental Engineer II 4. Person contacted and telephone number: Mr. Larry McCaskill, (704) 422-5639 5. Directions to site: From the jct. of Hwy. 740 and SR 1719 (Falls Road) in the Town of Badin, travel east on SR 1719 to the end of the road (the road changes to SR 1727). The Falls Powerhouse is located at the end of SR 1727. 6. Discharge point(s), list for all discharge points: - Latitude: 35 ° 23' 44" Longitude: 80° 04' 34" Attach a USGS Map Extract and indicate treatment plant site and discharge point on map. USGS Quad No.: E 18 NE 7. Size (land available for expansion and upgrading): There is little, if any, area available for the construction of wastewater treatment facilities. 8. Topography (relationship to flood plain included): The Powerhouse is located on the main segment of the Yadkin River; however, the hydroelectric generation facilities are not subject to flooding. Page Two 9. Location of nearest dwelling: The nearest dwelling is at least 1000 feet from the Powerhouse site. 10. Receiving stream or affected surface waters: Yadkin River a. b. c. Classification: WS-IV and B River basin and subbasin no.: Yadkin 03-07-08 Describe receiving stream features and pertinent downstream uses: The Yadkin River is used for primary and secondary recreation and electricity generation. There are no known water intakes several miles below this Powerhouse. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of Wastewater: (MGD) Outfalls 001, 003, and 005: Outfalls 002 & 004: Outfall: 007: Outfall 001, 003, and 005: Outfall 002 and 004: Outfall 007: 0.432 MGD 0.0432 MGD 0.00072 MGD Unit's 1, 2, & 3 generator cooling water. Unit's 2 & 3 thrust bearing cooling water. Powerhouse floor drains, wheelpit drains, oil & sludge skimmer. b. Current permitted capacity: The permit does not contain a permitted capacity. c. Actual treatment capacity: Treatment is not provided at any of the six outfalls. d. Description of existing or substantially constructed treatment works: There are no existing treatment works nor are any proposed. For domestic wastewater disposal, employees have an on -site subsurface disposal system. e. Possible toxic impacts to surface waters: None. There are no biocides added to the cooling water at this facility. d. Pretreatment Program (POTWs only): N/A 2. Residuals handling and disposal scheme: There are no residuals generated. 3. Treatment Plant Classification: This facility does not meet the minimum criteria for a class I rating. 4. SIC Code(s): 4911 Wastewater Code(s): 48 MTU Code(s): N/A Page Three PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grants Funds (municipals only)? Public monies were not used in the construction of this facility. 2. Special monitoring requests: None at this time. 3. Additional effluent limits requests: None at this time. PART IV - EVALUATION AND RECOMMENDATIONS The applicant, Alcoa Power Generating, Inc., operates a powerhouse (dam) on the Yadkin River known as the Falls Powerhouse, which generates hydroelectric power. Complex electrical generation machinery exists at this facility that requires cooling water during operation. In this modification request, Alcoa plans to construct secondary containment around existing transformers located at the subject facility. This secondary containment will require the occasional removal of storm water (SW) that will accumulate in the containment area and ultimately be discharged through existing SW outfalls. In lieu of additional monitoring, Alcoa has requested that BMP's be utilized to ascertain permit compliance. It should be pointed out that these are existing transformers, and any leakage that may have occurred from these units in the past would have entered the existing SW drainage without being monitored. This Office has no objection to allowing Alcoa to utilize BMP's in lieu of additional monitoring, however, it is recommended that the NPDES permit contain a requirement that any discharges from the secondary containment structure be reported along with the annual monitoring currently required by the permit. It is recommended that the NPDES Permit be modified as requested. 15ZSignature of Report reparer to T 4 �/ZL/O Water Quality Regional Supervisor Date h:\dsr\dsr07\fal lsdam.dsr DENR/ DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES No. NC0076775 Facility Information Applicant/Facility Name: Alcoa Power Generating, Inc. /Falls Powerhouse Applicant Address: PO Box 576, Badin, NC 28009-0576 Facility Address: Falls Road, Badin NC 28009 Permitted Flow N/A Type of Waste: Once -through cooling water. Facility/ Permit Status: Modification County: Stanly Miscellaneous Receiving Stream: Yadkin River Regional Office: Mooresville Stream Classification: 303(d) Listed?: Subbasin: WS-IV & B CA NO 03-07-08 USGS Topo Quad: Permit Writer: Date: F18NE Agyeman Adu-Polcu May 23, 2007 Drainage Area (mi2): Summer 7Q 10 (cfs) Winter 7Q 10 (cfs): Average Flow (cfs): 'WC (%): Primary SIC Code: 4911 SUMMARY This facility used to maintain 6 outfalls (001, 002, 003, 004, 005 and 007). The source of wastewater for the outfalls is once through cooling water and water from sump drain. The old permit stipulates that outfalls 001 through 005 be monitored (with no limits) for flow, temperature and pH. The permittee requested a seventh outfall (008) be added for periodic discharge of stormwater. Best management practices (BMP) requirements are added to outfall 008 for stormwater discharge from secondary containment around the transformers. Discharge monitoring reports have to be submitted yearly. The receiving stream (Yadkin River) is classified as WS-IV and B CA waters from a point 0.6 mile upstream of High Rock Lake dam to Badin Dam. This reach is not listed on the 303(d) list as impaired water. However, according to the March 2003 Yadkin -Pee Dee River Basinwide Water Quality management Plan this reach is impaired due to low DO concentration. TOXICITY TESTING: Current Requirement: Recommended Requirement: COMPLIANCE SUMMARY: N/A N/A INSTREAM MONITORING: This facility is not required to perform any instream monitoring. PROPOSED CHANGES: Outfall 004 is added for stormwater discharge and BMP requirements included. PROPOSED SCHEDULE FOR PERMIT ISSUANCE: Draft Permit to Public Notice: 5/23/2007 Permit Scheduled to Issue: 7/16/2007 Alcoa Power Generating, Inc. — High Rock Hydroelectric Powerhouse Fact Sheet NPDES Renewal Page 1 STATE CONTACT: If you have any questions on any of the above information or on the attached permit, please contact Agyeman Adu- Poku at (919) 733-5038 ext. 508 REGIONAL OFFICE COMMENT: This is a major permit modification therefore the regional office comments will be solicited during the public comment period. NPDES Recommendation by: �lJ Signature 4?Sfet` Date Regional Office Comments Regional Recommendation bv: Signature Date Reviewed and accepted by: Regional Supervisor: Signature Date NPDES Unit Supervisor: Signature Date Alcoa Power Generating, Inc. — High Rock Hydroelectric Powerhouse Fact Sheet NPDES Renewal Page 2 ALCOA April 23, 2007 N. C. Department of Environment and Natural Resources Division of Water Qwiality 1617 Mail Service Center Raleigh, N. C. 27699-1617 Attention: Ms Susan Wilson Alcoa Primary Metals Alcoa Power Generating Inc. Yadkin Division 293 NC 740 Hwy PO Box 576 Badin, NC 28009-0576 USA CER'i'WIED MAIL RETURN RECEIPT REQ 1158 3755 RE: STORMWATER DISCHARGE PERMITTING - ALCOA POWER GENERA FALLS POWERHOUSE — NC0076775 NARROWS POWERHOUSE — NC0081957 TUCKERTOWN POWERHOUSE — NC0081949 HIGH ROCK POWERHOUSE — NC0081931 Dear Ms. Wilson: DENR - WATER QUALITY POINT SOURCE BRAIJCH Alcoa Power Generating, Inc has plans to install secondary containment for transformers which are part of the substations located at the Falls, Tuckertown, and High Rock Powerhouses. The Narrows Powerhouse does not have transformers on site and thus will not be installing any containment at this location. The installation of secondary containment will require the periodic removal of storm water which accumulates in the containment area and discharge through existing storm water conveyance systems. Historically, the storm water from these substations has been passively discharged through these same existing storm water conveyance systems. As per previous conversations regarding this matter, Alcoa Power Generating, Inc would like to request that Best Management Practices (BMP's) be utilized for permitting these discharges in lieu of monitoring requirements and associated permit limits. The Best Management Practices that we are proposing would include designing the sumps with underfloor weirs/devices to prevent the discharge of oily water, weeldy inspections of the transformers for leaks / drips of oil, routine preventative maintenance procedures to address any leaks / drips of oil, inspection of the sump for the presence of oil as indicated by a visible sheen prior to discharging, and maintaining a log to document the time, date, and volume of water discharged per discharge event. To this end, please find attached an application to amend the the Falls Powerhouse NPDES permit to include this discharge, as well as, a check for the permit fee in the amount of $215.00. If you should have any questions or comments, please don't hesitate to contact me @ 704-422-5774 or Larry McCaskill @ 704-422-5639. Yours Very ruly, kJ. ass Vice Pre ent of Operations Alcoa Power Generating, Inc cc:email Z. T. Gibson W. L. McCaskill J. D. Morton — NAEHS R. Dworek — PGH Legal W. M. Bunker NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. Mail the complete application to: N. C. Department of Environment and Natural Resources Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 NPDES Permit Number ,NC0076775 If you are completing this form in computer use the TAB key or the up - down arrows to move from one field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type. 1. Contact Information: Owner Name ALCOA POWER GENERATING, INC Facility Name FALLS POWERHOUSE Mailing Address P.O BOX 576 City BADIN State / Zip Code N.C. 28009 APR 2 7 2007 L Telephone Number (704)422-5774 - W.-JE3t (HL LITY PONT SONCE. i Fax Number (704)422-5776 e-mail Address MARK.GROSS ALCOA.COM 2. Location of facility producing discharge: Check here if same as above ❑ Street Address or State Road City State / Zip Code County FALLS ROAD BADIN N.C. 28009 STANLY 3. Operator Information: Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the Operator in Responsible Charge or ORC) Name ALCOA POWER GENERATING, INC Mailing Address P.O BOX 576 City BADIN State / Zip Code N.C. 28009 Telephone Number (704)422-5774 Fax Number (704)422-5776 Dona 1 of A l`_0/I (Zing NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. 4. Ownership Status: Federal ❑ State ❑ Private ® Public 0 5. Standard Industrial Classification (SIC) code(s): 4911 6. Number of employees: 4 7. Describe the treatment system List all installed waste treatment components with capacities, describe the processes that generate wastewaters. If the space provided is not sufficient attach a separate sheet of paper with the system description. N/A 8. Is facility covered under federal effluent limitation guidelines? No ® Yes If yes, specify the category? 9. Principal product(s) produced: ELECTRICITY Principal raw material(s) consumed: N A Briefly describe the manufacturing process(es): o Donn 1 *f A r_eU! nzmR NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. HYDROELECTRIC GENERATION 10. Amount of principal product produced or raw material consumed List specific amounts consumed and/or units of production over the last three years Product Produced or Raw Material • Consumed • (AVERAGE) Product Produced or Raw Material Consumed (PEAK) per Day 385 MW _ 806 MW per Month 11,714 MW 24,528 MW per Year 140,569 MW 294,336 MW 11. Frequency of discharge: Continuous ❑ Intermittent El If intermittent: Days per week discharge occurs: <1 Duration: <1 12. Types of wastewater discharged to surface waters only Discharge Flow (GALLONS PER DAY) Sanitary - monthly average N/A Utility water, etc. - monthly average N/A Process water - monthly average N/A Stormwater - monthly average UNDETERMINED Other - monthly average 1,382,400 Explain. COOLING WATER Dorset 1nfA NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. Monthly Average total discharge (all types) 1,383,120 13. Number of separate discharge points: 6 Outfall Identification numbers) 001, 002, 003, 004. 005, 007 14. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): YADKIN RIVER 15. Effluent Data Provide data for the parameters listed. Temperature and pH shall be grab samples, for all other parameters 24-hour composite sampling shall be used. If more than one analysis is reported, report daily maximum and monthly average. If only one analysis is reported, report as daily maximum. Parameter Daily Maximum Monthly Units of Measurement Average Biochemical Oxygen Demand (GODS) Chemical Oxygen Demand (COD) Total Organic Carbon Total Suspended Solids Ammonia as N Temperature (Summer) Temperature (Winter) pH Fecal Coliform (If sanitary waste is present) Total Residual Chlorine (if chlorine is used) 16. List all permits, construction approvals and/or applications (check all that apply and provide permit numbers or check none if not applicable): Type Permit Number Type Permit Number DonaAnfA P-SAI AMR NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. Hazardous Waste (RCRA) UIC (SDWA) NPDES PSD (CAA) Non -attainment program NESHAPS (CAA) Ocean Dumping (MPRSA) NC0076775 Dredge or fill (Section 404 or Other 17. List any chemicals that may be discharged (Please list and explain source and potential amounts.) Oil & Grease - deminimus quantities - Stormwater discharge from secondary containment of transformers 18. Is this facility located on Indian country? (check one) Yes ❑ No El 19. Applicant Certification I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such information is true, complete, and accurate. Mark J. Gross Printed name of erson S ignature Vice President of Operations Title of pplicant Date North Caro • a General Statute 143-215.6 (b)(2) provides that Any person who knowingly makes any false statement representation, or certification in any application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.) Dona A of A r_1111I WINK FACT SHEET FOR EXPEDITED RENEWAL Permit Number /1/000 76 775 Facility Name da //f to,, ‘P.I-C. Reviewer M n M Basin/Sub-basin O 3Q o8 Receiving Stream %AIM Is the stream impaired (listed on 303(d))? No Is stream monitoring required? No Do they need NH3 limit(s)? Pb Do they need TRC limit(s)? 44 Do they have whole -effluent toxicity testing? A/0 Are there special conditions? No Any obvious compliance concerns? A Existing Expiration Date 014 Proposed Expiration Date (/, , (047 Miscellaneous Comments: Circle one: DO NOT EXPEDITE If expedited, is this a simpler permit or a more difficult one?