Loading...
HomeMy WebLinkAboutNCS000548_Marshall SW Permit Application Signed Complete_20141014DUKE iL!"ENERGY, October 9, 2014 Mr. Bradley Bennett State of North Carolina Department of Environment and Natural Resources Division of Energy, Mineral & Land Resources Stormwater Permitting Program 1612 Mail Service Center Raleigh, NC 27699-1612 Subject: NPDES Stormwater Permit Application Marshall Steam Station Dear Mr. Bennett: Environmental Services Duke Energy 526 South Church Street Charlotte, NC 28202 Mailing Address. Mail Code EC13K/ P.O. Box 1006 Charlotte, NC 28201-1006 Duke Energy requests a stormwater discharge permit for the Marshall Steam Station located in Catawba County, North Carolina. Enclosed is a check from Duke Energy in the amount of $860.00 for the subject stormwater permitting fee; and three sets of the following documents related to this permit request: a. EPA Form 1: b. EPA Form 2F C. EPA Form 2F Supplemental Information: d. Site Location Map; e. Site Stormwater Plan Drawing Numerous stormwater outfalls are located at the Marshall Steam Station, No stormwater data is currently available, however, all accessible outfalls at the station will be sampled in due course as qualifying rainfall events occur at the site. As described in the accompanying supplemental information, Duke Energy is investigating the status of Outfall SW010 which is believed to be abandoned. Should you have any questions regarding this submittal or require additional information, please contact Mark McGary at 980-373-7898 or email Mark.McGary@duke-energy.com. I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of'the person or persons who mana�a 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. / am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violation Sincerely, ' I Brian R. Weisker - General Manager III Marshall Steam Station Attachments bc: George Tolbert — Marshall Steam Station Brian Weisker — Marshall Steam Station Penny Stafford Mark McGary Steve Cahoon Harry Sideris Linda Hickok Mike Shrader Document Number: 8-6 Record Type Code- ENV -50-02 UPS: Check Date: Sep 09 2014 Vendor Number: 0000071P49 Name: STATE OF NORTH CAROLINA DEPARTMENT OF Check *cumber: 1000123004 Invoice Number Invoice Date Voucher ID Gross Amount Discounts Taken Late Charge Paid Amount 0903201486000ST MARSHALL STEAM S rATION Sep 03 2014 10669670 860.00 0.00 0.00 86000 Check Number: Date Total Gross Amount Total Discounts Total Late Charges Total Paid Amount 1000123004 Sep/09. 2014 $860.00 $000 50.00 S86000 Duke Energy Business Services 1000123004 DUKE 400 South Tryon Street JPMORGAN CHASE BANK, N.A. ENERGY. Charlotte, NC 28285 Syracuse, NY 50-937.213 Corporate Accounts Payable ST258 1 400 South Tryon Street Charlotte, NC 28285 Date 9/9/114 Pay Eight hundred sixty and x . /00 Dollars $**860,00 To The Order Or STATE OF NORTH CAROLINA DEPARTMENT OF ENVIROMENT AND NATURAL RESOURCES DIV OF ENERGY MINERAL AND LAND RESOURCES 1641 MAIL SERVICE CENTER Raleigh, NC 27699-1612 ddA ffte Authorized Signature FORM U.S. ENVIRONMENTAL PROTECTION AGENCY I. EPA I.D. NUMBER 1 ^ EPA GENERAL INFORMATION S T/A C NC0004987 F Consolidated Permits Program D GENERAL (Read the "General Instructions" before starting.) , 2 13 14 1s LABEL ITEMS GENERAL INSTRUCTIONS If a preprinted label has been provided, affix it in the I. EPA I.D. NUMBER designated space. Review the information carefully; ti any of it is incorrect, cross through it and enter the correct data in the appropriate fill-in area below. II. FACILITY NAME Also, if any of the preprinted data is absent (the area to the left of the label space lists the Ill. FACILITY MAILING PLEASE PLACE LABEL IN THIS SPACE information that should appear), please provide it in below.need proper fill-inlcorrect, ADDRESS co yu not complete Items I, III, V, and VI(except VI -13 which must be IV. FACILITY LOCATION completed regardless). Complete all items if no label has been proved. Refer to the instructions for detailed item descriptions and for the legal authorization under which this data is collected. II. POLLUTANT CHARACTERISTICS INSTRUCTIONS: Complete A through J to determine whether you need to submit any permit application forms to the EPA. If you answer yes' to any questions, you must submit this form and the supplemental from listed in the parenthesis following the question. Mark *X* in the box in the third column if the supplemental form is attached. If you answer 'no' to each question, you need not submit any of these forms. You may answer'no' if your activity is excluded from pemlft requirements; see Section C of the instructions. See also, Section D of the instructions for definitions of bob -faced terms. MARK •X MARK'X* SPECIFIC QUESTIONS SPECIFIC QUESTIONS FORM FORM YES NO ATTACHED YES NO ATTACHED A. Is this facility a publicly owned treatment B. Does or will this facility (either existing or works which results in a discharge to waters ofE] ® ❑ proposed) include a concentrated animal E] ® 1:1the U.S.? (FORM 2A) feeding operation or aquatic animal production facility which results in a discharge to waters of the U.S.? (FORM 26) 16 17 16 19 20 21 C. Is this facility which currently results in ® ❑ ® D. Is this proposal facility (other than those El ® 1:1discharges to waters of the U.S. other than described in A or B above) which will result in a 22 23 24 25 26 27 those described in A or B above? (FORM 2C) discharge to waters of the U.S.? (FORM 2D) E. Does or will this facility treat, store, or dispose of F. Do you or will you inject at this facility industrial or hazardous wastes? (FORM 3)❑ ® 1:1 municipal effluent below the lowermost stratum 11 ® 11containing, within one quarter mile of the well bore, 28 29 30 underground sources of drinking water? (FORM 4) 31 32 33 G. Do you or will you inject at this facility any produced H. Do you or will you inject at this facility fluids for water other fluids which are brought to the surface in connection with conventional oil or natural gas 1:1 ® 1:1Frasch special processes such as mining of suffer by the process, solution mining of minerals, in ❑ ® ❑ production, inject fluids used for enhanced recovery situ combustion of fossil fuel, or recovery of of oil or natural gas, or inject fluids for storage of geothermal energy? (FORM 4) liquid hydrocarbons? (FORM 4) 34 35 36 37 38 39 1. Is this facility a proposed stationary source J. Is this facility a proposed stationary source which is one of the 28 industrial categories listed which is NOT one of the 28 industrial categories ❑ ® El ® 1:11:1listed in the instructions and which will potentially emit 100 tons per year of any air pollutant regulated in the instructions and which will potentially emit 250 tons per year of any air pollutant under the Clean Air Act and may affect or be regulated under the Clean Air Act and may affect located in an attainment area? FORM 5 40 41 42 or be located in an attainment are? FORM 5 43 44 45 III. NAME OF FACILITY C SKIP Marshall Steam Station 1 15 16.29 30 69 IV. FACILITY CONTACT A. NAME & TITLE last first & title B. PHONE area code & no. CMcGary, Mark / Lead Engineer 980 373 7898 15 1 16 45 1 46 48 49 51 52 55 V. FACILITY MAILING ADDRESS A. STREET OR P.O. BOX s P.O. Box 1006, Mail Code EC13K 15 16 45 B. CITY OR TOWN C. STATE D. ZIP CODE D Charlotte NC 28201 4 15 16 40 1 41 42 1 47 51 VI. FACILITY LOCATION A. STREET, ROUTE NO. OR OTHER SPECIFIC IDENTIFIER C 8320 East NC Highway 150 1s 1 16 45 B. COUNTY NAME Catawba 46 70 C. CITY OR TOWN D. STATE E. ZIP F. COUNTY CODE CODE DTerrell NC L 28682 s 15 1 16 401 41 42 47 51 1 52 54 EPA FORM 3510-1 (8-90) CONTINUED ON REVERSE CONTINUED FROM THE FRONT VII. SIC CODES (4 -digit, in order of riori A. FIRST B. SECOND J4911 (specify) 7 (specify) s,s Electric Services s 17 1s C. THIRD D. FOURTH c (specify) 7 (specify) 7 7 15 16 17 15 16 19 VIII.OPERATOR INFORMATION A. NAME I B. Is the name listed in Item cDuke Energy Carolinas, LLC (Attention: Mark McGary) VIII -A also the owner? f3 EYES []NO 18 19 s5 C. STATUS OF OPERATOR Enter the appropriate letter into the answer box; if 'Other,'specify.) D. PHONE area code & no. F = FEDERAL M = PUBLIC (other than federal or state) P (specify) c 980 7898 A S = STATE O = OTHER (specify) Electric Utility �73 56 is 18 21 22 25 P = PRIVATE 15 E. STREET OR PO BOX P.O. Box 1006, Mail Code EC13K 26 ss F. CITY OR TOWN G. STATE H. ZIP CODE IX. INDIAN LAND c Charlotte NC 28201 Is the facility located on Indian lands? B ❑ YES ® NO 15 16 40 42 42 47 st X. EXISTING ENVIRONMENTAL PERMITS A. NPDES (Dischargfes to Surface Water D. PSD Air Emissions from Proposed Sources 1 NC0004987 9 P 9 N 15 16 17 18 30 15 1 16 17 18 30 B. UIC (Underground Injection of Fluids E. OTHER (specify) (Specify) Air permit C T 1 ` T 1 8 s 1 03676T49 9 U 1s 16 17 18 30 15 16 1 17 1 18 30 C. RCRA Hazardous Wastes E. OTHER (specify) (Specify) NCD043678879 9 T 8 SW P 18-09 / WQ0000452 Landfill permit / Distr. of s R 15 1 16 1 17 1 ,8 30 1 15 1s ,7 ,8 30 1 residual solids permit XI. MAP Attach to this application a topographic map of the area extending to at least one mile beyond property boundaries. The map must show the outline of the facility, the location of each of its existing and proposed intake and discharge structures, each of its hazardous waste treatment, storage, or disposal facilities, and each well where it injects fluids underground. Include all springs, rivers and other surface water bodies in the map area. See instructions for precise re uirements. XII. NATURE OF BUSINESS(provide a brief description) Coal-fired electric generation XIII. CERTIFICATION see instructions I certify under penalty of law that I have personally examined and am familiar with the information submitted in this application and all attachments and that, based on my inquiry of those persons immediately responsible for obtaining the information contained in the application, I believe that the information is true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibft of fine and imprisonment. A. NAME & OFFICIAL TITLE (type or print) B. G ATURE C. DATE SIGNED Brian R. Weisker - General Manager III ('o to 7--n (41 COMMENTS FOR OFFICIAL USE ONLY q5' 6 ss EPA FORM 3510-1 (5-90) EPA ID Number (copy from Item 1 of Form 1) Form Approved. OMB No. 2040-0086 Ns. Please onnt or Nae in the unshaded areaoniv NC00049h 7 Annrnval wvnirwa 531-99 FORM ZF NPDES U S Environmental Protection Agency EPA Washington, DC 20460 Application for Permit to Discharge Storm Water Discharges Associated with Industrial Activity Paperwork Reduction Act Notice Public reporting burden for this application is estimated to average 28.6 hours per application including time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding the burden estimate, any other aspect of this collection of information, or suggestions for improving this form, including suggestions which may increase or reduce this burden to: Chief, Information Policy Branch, PM -223, U.S. Environmental Protection Agency, 1200 Pennsylvania Avenue, NW, Washington, DC 20460, or Director, Office of Information and Regulatory Affairs, Office of Management and Budget, Washington, DC 20503. (.Outfall Location For each outfall, list the latitude and longitude of its location to the nearest 15 seconds and the name of the receiving water. A. Outfall Number D. Receiving Water (list) B Latitude C. Longitude (name) See attached See attached supplemental information II. Improvements A. Are you now required by any Federal, State, or local authority to meet any implementaton schedule for the construction, upgrading or operation of wastewater treatment equipment or practices or any other environmental programs which may affect the discharges described in this application? This includes, but is not limited to, permit conditions, administrative or enforcement orders, enforcement compliance schedu,e letters stipulations court orders, and grant or loan conditions 2. Affected Outfalls 4. Final 1. Identification of Conditions, Compl ance Date Agreements, Etc. number source of discharge 3 Brief Description of Project a req b prol N/A B You may attach addit-onal sheets describing any additional water pollution (or other environmental projects which may affect your discharges) you now have under way or which you plan Indicate whether each program is now underway or planned, and ndicate your actual or planned schedules for construction III. Site Drainage Map Attach a site map showing topography (or indicating the outline of drainage areas served by the outfalls(s) covered in the application d a topographic map is unavailable) depicting the facility including: each of its intake and discharge structures the drainage area of each storm water outfall, paved areas and buildings within the drainage area of each storm water outfall, each known past or present areas used for outdoor storage of disposal of significant materials, each existing structural control measure to reduce pollutants in storm water runoff, materials loading and access areas, areas where pesticides, herbicides, soil conditioners and fertilizers are applied; each of its hazardous waste treatment, storage or disposal units (including each area not required to have a RCRA permit which is used for accumulating hazardous waste under 40 CFR 262 34) each well where fluids from the facility are injected underground; springs, and other surface water bodies which received storm water discharges from the facility EPA Form 3510-2F (1 92) Page 1 of 3 Continue on Page 2 Continued from the Front IV. Narrative Description of Pollutant Sources A For each outfall provide an estimate of the area (include units) of imperious surfaces (including paved areas and building roofs) drained to the outfall, and an estimate of the total surface area drained by the outfall Outfall Area of Impervious Surface Total Area Drained Outfall Area of Impervious Surface Total Area Drained Number (provide units) (provide units) Numb r (provide units) (provide units) See attached supplemental information B. Provide a narrative description of significant materials that are currently or in the past three years have been treated, stored or disposed in a manner to allow exposure to storm water; method of treatment, storage, or disposal past and present materials management practices employed to minimize contact by these materials with storm water runoff; materials loading and access areas, and the location, manner, and frequency in which pesticides, herbicides, soil conditioners, and fertilizers are applied. See attached supplemental information C. For each outfall, provide the location and a description of existing structural and nonstructural control measures to reduce pollutants in storm water runoff; and a description of the treatment the storm water receives, including the schedule and type of maintenance for control and treatment measures and the ultimate disposal of any solid or fluid wastes other than by discharge. Outfall List Codes from Number Treatment Table 2F-1 See attached supplemental information V. Nonstormwater Discharges A. I certify under penalty of law hat the outfall(s) covered by this application have been tested or evaluated for the presence of nonstonnwater discharges, and that all nonstormwater discharged from these outfall(s) are identified in either an accompanying Form 2C or From 2E application for the outfall. Name and Official Title (type orprint) Signa/���_� Date Signed Brian R. Weisker - Gen. Manager III 006� B. Provide a description of the method used, the date of any testing, and the onsite drainage points that were directly observed during a test. visual inspection was performed on August 28, 2014. Each outfall was observed for outflow after a period of at least 72 hours of dry weather. NPDES discharges of process water were excluded. There were no non-stormwater discharge flows observed. Outfall SWO07 was submerged and could not be assessed. I. Significant Leaks or Spills Provide existing information regarding the history of significant leaks or spills of toxic or haz rdous pollutants at the faclity n the last three years, including the approximate date and location of the spill or leak, and the type and amount of material released Within the past three years there have been no significant spills or leaks of hazardous substances in excess of reportable quantities set forth by Section 311 of the Clean Water Act or Section 102 of CERCLA. EPA Form 3510-2F (1-92) Page 2 of 3 Continue on Page 3 EPA ID Number (copy from Item 1 of Form 1) Continued from Page 2 NC0004987 II. Discharge Information A. B, C. & D: See instructions before proceeding Complete one set of tables for each outfall Annotate the outfall number in the space provided. Table VII -A, VII -B, VII -C are included on separate sheets numbers VII -1 and VII -2. E. Potential discharges not covered by analysis - is any toxic pollutant listed in table 2F 2 2F-3, or 2F-4, a substance or a component of a substance which you currently use or manufacture as an intermediate or final product or byproduct? ❑ Yes (list all such pollutants below) No (go to Section 1?f) III. Biological Toxicity Testing Data Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a receiving water in relation to your discharge within the last 3 years? ❑ Yes (list all such pollutants below)✓❑ No (go to Section 1X) IX. Contract Analysis Information Were any of the analyses reported in Item VII performed by a contract laboratory or consulting firm? © Yes (list the name, address, and telephone number of and pollutant ❑ No (go to Section X) analyzed by, each such laboratory or firm below) A. Name B Address C. Area Code & Phone No. 0 Pollutants Analyzed Pace Analytical Services, Inc. 9800 Kincey Ave, Suite 100 704-875-9092 Oil and Grease Huntersville, NC 28078 X. Certification 1 cpr* under penalty of law that thi= 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 fine and imprisonment for knowing violations A. Name & Official Title (Type Or Print) B. Area Code and Phone No. Brian R. Weisker - General Manager III (828) 478-7600 C. Signa re .-. D. Date Signed Ij-e��" 01 2 0/ y EPA Form 3510-2F (1-92) Page 3 of 3 EPA ID Number (copy from Item 1 of Form 1) Form Approved OMB No. 2040-0086 NC000U& 7 I Approval expires 5-31-92 VII. Discharge information (Continued from page 3 of Form 2F) Part A — You must provide the results of at least one analysis for every pollutant in this table Complete one table for each outfall. See instructions for additional details Pollutant and CAS Number (if available) Max mum Values (include units) Average Values (include units) Number of Storm Events Sampled Sources of Pollutants Grab Sample Taken During First 20 Minutes Flow -Weighted Composite Grab Sample Taken During First 20 Minutes Flow -Weighted Composle Oil and Grease N/A See attached supplemental Biological Oxygen Demand (BODS) information Chemical Oxygen Demand (COD) Total Suspended Solids (TSS) Total Nitrogen Total Phosphorus pH Minimum Maximum Minimum Maximum Part B — List each pollutant that is limited in an effluent guideline which the facility is subject to or any pollutant listed in the facility s NPDES permit for its process wastewater (if the facility is operating under an existing NPDES permit). Complete one table for each outfall. See the instructions for additional details and requirements. Maximum Values Average Values (include units) (include units) Pollutant Grab Sample Grab Sample and Taken During Taken During CAS Number First 20 Flow -Weighted First 20 Flow -Weighted (if available) Minutes Composite Minutes Composite Number of Storm Events Sampled Sources of Pollutants See attached supplemental information EPA Form 3510-2F (1-92) Page VII -1 Continue on Reverse Continued from the Front Part C - List each pollutant shown in Table 2F-2, 2F-3, and 2F-4 that you know or have reason to believe is present See the instructions for additional details and requirements. Complete one table for each outfall. Maximum Values Average Values (include units) (include units) Number Pollutant Grab Sample Grab Sample of and Taken During Taken During Storm CAS Number First 20 Flow -Weighted First 20 Flow -Weighted Events (if available) Minutes Composite Minutes Composite Sampled Sources of Pollutants See attached supplemental information Part D — Provide data for the storm event(s) which resulted in the maximum values for the flow weighted composite sample. 1. Date of Storm Event 2. Duration of Storm Event (in minutes) 3. Total rainfall during storm event (in inches) 4 Number of hours between beginning of storm measured and end of previous measurable rain event 5. Maximum flow rate during rain event (gallonslminute or specify units) 6 Total flow from rain event (gallons or specify units) 7. Provide a description of the method of flow measurement or estimate. EPA Form 3510-2F (1-92) Page VII -2 MARSHALL STEAM STATION Stormwater Discharge Permit Application Form 2F Supplemental Information NPDES Permit #NC0004987 GENERAL SITE INFORMATION Marshall Steam Station is a fossil -fueled, electric generating plant located approximately one mile east of the community of Terrell in Catawba County, North Carolina. The facility has four production units with a generating capacity of 2,090 megawatts, a Flue Gas Desulfurization (FGD) system, a Selective Catalytic Reduction (SCR) system, a wetlands wastewater treatment plant, a limestone unloading and stacker system, a gypsum stacker, an FGD landfill, and various storage and maintenance buildings. The Marshall Steam Station property is comprised of 2,043 contiguous acres. The property includes a 28 -acre plant yard, a 6 -acre electrical switchyard, a 36 -acre coal storage yard, and a 450 -acre ash settling basin. The ash settling basin is located in the headwaters of Holdsclaw Creek and has a regulated outflow to Lake Norman. The Marshall Steam Station property also includes approximately 80 acres occupied by an ash structural fill, an approximately 58 -acre closed ash landfill, an ash handling silo operation, a bottom ash operation, an FGD residue landfill, an FGD gypsum stacker operation, an FGD limestone stacker operation, an FGD constructed wastewater treatment wetlands, a sanitary wastewater treatment lagoon, several construction spoil areas, approximately 6 miles of rail access, and approximately 3 miles of paved roadways. In developed areas of the property, runoff is collected by catch basins and conveyed through a buried network of corrugated metal pipes (CMP). Concrete, cast iron, and high-density polyethylene (HDPE) pipes also serve as discharge structures. The network was originally designed to route flow to several primary trunk lines, which discharged directly to Lake Norman. In 1976, runoff from most areas with significant materials and activities was re-routed into a yard sump system. Stormwater entering the yard sump system is pumped to the ash settling basin. Stormwater runoff from the FGD facility area enters yard drains and is then routed via gravity flow through subsurface piping to a detention pond. This pond discharges to a transfer sump that pumps to the yard sump system/ash settling basin system. Stormwater runoff from the FGD limestone stacker operation is routed into a separate detention pond that discharges into the yard sump system/ash settling basin system. Stormwater runoff from the ash handling silo operation is also routed to the ash settling basin via the sump system. All stormwater runoff from the coal storage yard, the FGD residue landfill, the ash structural fill, the closed ash landfill, the FGD gypsum stacker operation, the FGD constructed wastewater treatment wetlands, and the bottom ash operation drains via gravity flow into the ash settling basin. Marshall Steam Station maintains an up-to-date Spill Prevention Control and Countermeasure (SPCC) Plan in accordance with the U.S. Environmental Protection Agency (USEPA) Oil Pollution Prevention Regulation 40 CFR Part 112. NPDES PERMITTED DISCHARGES SUMMARY Marshall Steam Station has six NPDES process water outfalls. The NPDES discharges are summarized as follows. Refer to Appendix A for representative photographs of these discharges. NPDES Outfall 001 — Once -Through Cooling Water This discharge is a once -through non -contact cooling water system that condenses steam from the condensers and other selected heat exchangers. This discharge occurs at the station discharge canal. NPDES Outfall 002 — Ash Settling Basin Discharge This is the outflow from the ash settling basin. Plant wastewater including ash sluicing, treated sewage, equipment discharge, and chemical waste is routed to the ash settling basin. All stormwater runoff from the coal storage yard, the FGD residue landfill, the ash structural fill, the closed ash landfill, the FGD gypsum stacker operation, the FGD constructed wastewater treatment wetlands, and the bottom ash operation drains via gravity flow into the ash settling basin. All stormwater runoff from the FGD facility area is routed through the yard sump system to the ash settling basin. Stormwater runoff from the FGD limestone stacker operation is routed through the yard sump system to the ash settling basin. Stormwater runoff from the ash handling silo operation is also routed to the ash settling basin via the sump system. NPDES Outfall 002A — Yard Sump #1 Overflow Should the pumps in Yard Sump #1 lose power, experience a mechanical failure, or become inundated during a large storm event, the sump would overflow to Lake Norman through stormwater outfall SW007. Overflow from the yard sump is not a normal occurrence. NPDES Outfall 002B — Yard Sump #2 Overflow Should the pumps in Yard Sump #2 lose power, experience a mechanical failure, or become inundated during a large storm event, the sump would overflow directly to Lake Norman. Overflow from the yard sump is not a normal occurrence. NPDES Outfall 003 — Non -Contact Cooling Water from the Induced Draft Fan Control House This is air conditioning condensate from the heat exchanger for the Unit 4 induced draft (ID) fans' electronics. This discharge co -mingles with stormwater outfall SW009. The condensate discharge essentially occurs continuously through SW009. NPDES Internal Outfall 004 — Treated FGD Wet Scrubber Wastewater to the Ash Settling Basin 2 STORMWATER OUTFALLS AND DRAINAGE AREA DESCRIPTIONS Marshall Steam Station has 14 identified active stormwater outfalls that discharge to surface waters. The outfall locations and contributing drainage area delineations are shown on the accompanying site plan. All identified stormwater outfalls discharge into Lake Norman. A description of the contributing drainage area for each outfall is provided below. Included with the description is the amount of impervious surface area within the drainage area, any significant materials activities within the drainage area, and the type of conveyance including any discharge control measures. In addition to any significant materials particular to each drainage basin, herbicides are applied to selected areas at Marshall Steam Station to eliminate undesirable vegetation. Herbicides are generally used along railways, ash pipelines, and the perimeter fence. Herbicides are also applied, as needed, in the gravel parking lots, switchyard, and laydown areas. Herbicides are sprayed around the fuel oil bulk storage tanks, yard sumps, transformers, trailers, and the intake structure. All herbicides used at Marshall Steam Station are approved by the company and considered safe to the environment when used according to directions. Records are retained at the facility documenting the areas treated, and the type and amount of herbicides used. Certain stormwater outfall drainage areas share similarities regarding significant materials and/or activities. Based on these similarities, stormwater discharges from certain groups of outfalls can be represented by the discharge of a designated representative outfall within the group. Outfalls SW001 through SW004 (Drainage Areas 1 through 4) Discharge Structure Outfall SW001: 24 inch diameter CMP Location: Intake Cove Coordinates: 350 36' 23" N 800 57'33" W Discharge Structure Outfall SW001A: 18 inch diameter concrete pipe Location: Intake Cove Coordinates: 35° 36'24" N 80° 57'33" W Discharge Structure Outfall SW002: 24 inch diameter CMP Location: Intake Cove Coordinates: 35° 36' 17" N 80° 57'36" W Discharge Structure Outfall SW003: Ditch Location: Intake Cove Coordinates: 350 36' 11" N 800 57'40" W Discharge Structure Outfall SW004: 36 inch diameter HDPE pipe Location: Intake Cove Coordinates: 350 36' 02" N 800 57'46" W Total Drainage Area: 8.9 acres Total Impervious Area: 1 % Area Description These outfalls (with the exception of SW003) are essentially culverts beneath a gravel road, a gravel storage yard area, and a paved area surrounding the ash silo. The combined drainage 3 area for these outfalls also includes the vegetated slopes of the ash settling basin dike. The embankment of the ash basin dike is sloped at a ratio of two horizontal to one vertical (2H:1 V) and covers approximately 30 percent of the drainage area. The outfalls (with the exception of SW003) do not discharge directly into surface waters, but discharge into a vegetated strip adjacent to the intake canal. Stormwater is then conveyed to the lake via overland flow or ditch. The distance the discharge travels to reach the intake canal varies for each outfall. The discharge from Outfalls SW001 and SW001A flows overland through a forested area approximately 100 yards before reaching the intake canal. The discharge from Outfalls SW002 and SW004 flows down a riprapped embankment approximately 10 yards before reaching the intake canal. SW003 is a riprap-lined ditch that extends from the eastern edge of the gravel road to the intake canal. The gravel laydown area contains various quantities of structural steel, cable, truck trailers, and other inert materials at various times. Stormwater runoff from most of this area discharges through SW002 and SW003. Ash haul trucks use the paved road portions of this drainage area to access the ash silo. The ash haul trucks are washed down in the ash silo area to remove excess ash and prevent the scattering of ash on site roads. Stormwater runoff from the ash handling silo, the ash truck washing pad, and the paved haul road between the silo and the Powerhouse is collected in a sump, which is subsequently pumped to Sump #2 and then conveyed to the ash settling basin. Two small pad -mounted service transformers containing mineral oil are located near the ash silo. The larger capacity transformer is located on a curbed concrete containment pad. There is no containment for the smaller transformer. These small service transformers represent an insignificant risk of a mineral oil release reaching surface waters. Outfalls SW001, SW001A and SW002 are currently planned for abandonment as part of upcoming erosion repair work to the nearby active ash basin dam embankment. Three new HDPE discharge pipes are planned for installation in the same general area as part of this project. Consequently, the existing SW001, SW001A and SW002 outfalls should be removed from any permitting considerations and replaced with the planned new HDPE outfalls using the same number designations. Significant Materials Inert Materials: Various quantities of structural steel, cable, truck trailers, and other inert materials are stored on the gravel storage area at various times. Oil: Two pad -mounted service transformers are located near the ash handling silo. The larger transformer contains 320 gallons of mineral oil and is located within a concrete containment pad. The smaller transformer contains 250 gallons of mineral oil and has no containment. Discharge Controls None. 4 Outfall SW005 (Abandoned) This outfall is an 18 inch diameter concrete pipe no longer in use. Outfall SW006 (Drainage Area 6) Discharge Structure: 18 inch diameter CMP Location: Intake Canal Coordinates: 350 35'57" N 800 57' 51" W Drainage Area: 2.6 acres Impervious Area: 40% Area Description The drainage area for SW006 includes a portion of the Powerhouse yard, approximately 9,000 square feet of the roof of the warehouse, 3,300 square feet of storage shed roof, and 12,500 square feet of an open concrete storage pad. This drainage area also includes approximately 0.5 acre of vegetated embankment slopes. Ash piping and fuel oil piping are located within the drainage area for SW006. Significant Materials Oil: One 2 -inch -diameter above -grade oil pipeline passes through this drainage area and carries fuel oil from the 500,000 gallon bulk storage tank to the tractor shed located adjacent to the coal pile. Ash: Ash sluice piping passes through the SW006 drainage area and carries ash from the Powerhouse to the ash silos. Stormwater and ash truck wash water from the ash silo operation flows through the SW006 drainage area to Sump #2. Discharge Controls None. Outfall SW007 (Drainage Area 7) Discharge Structure: 60 inch diameter CMP Location: Intake Canal Coordinates: 350 35'56" N 800 57' 51" W Drainage Area: 39.2 acres Impervious Area: 5% Area Description The drainage area for SW007 comprises areas immediately north and extending west of the Powerhouse. The drainage area includes the roofs of the office annex, service building, covered coal conveyors, and the remaining portion of the warehouse. The drainage area also includes paved Powerhouse yard areas, a 2 -acre paved parking lot, 4 miles of rail line, and a 3 - acre graveled switchyard. Roofed areas comprise approximately 35,000 square feet. Vegetated embankments and outlying vegetated areas west of the Powerhouse comprise most of the SW007 drainage area. Located within Drainage Area SW007 is approximately 50 drums of lube oil and small containers of hydrazine, glycerin, and 2 -propanol stored inside the warehouse. Approximately 1,400 feet of the covered FGD limestone and gypsum conveyors crosses through the SW007 drainage area. 5 Drainage Area SW007 includes small transformers containing mineral oil located in the 3 -acre graveled switchyard. The limestone radial stacker operation is also located within the drainage basin of SW007, however, stormwater runoff from this internal area is collected within a detention pond that discharges into Sump #1 and is subsequently pumped to the ash basin. On rare occasions, the stormwater discharge from SW007 is comingled with the NPDES- permitted overflow from Sump #1 (NPDES Outfall 002A). Outfall SW007 is submerged and only accessible by boat. No sampling at the outfall is feasible. Significant Materials Oil: Transformers containing a total of 340 gallons of mineral oil are located in the switchyard. Approximately 50 drums of lube oil are stored inside the Warehouse. Oil drum deliveries are made at the Warehouse. These drums are not routinely exposed to stormwater. Gypsum and Limestone: Approximately 1,400 feet of the covered FGD limestone and gypsum conveyors cross through the SW007 drainage area. Coal: The covered coal conveyors cross through the SW007 drainage area. Chemicals: Small containers of hydrazine, glycerin and 2 -propanol are stored inside the Warehouse. These containers are not routinely exposed to stormwater. Discharge Controls None. Outfall SW008 (Drainage Area 8) Discharge Structure: 8 inch diameter CMP Location: Intake Canal SW008 Coordinates: 35° 35'53" N 800 57'50" W SW008A Coordinates: 35° 35'55" N 800 57' 51" W Drainage Area: 0.1 acre Impervious Area: 70% Area Description The drainage area for SW008 is comprised primarily of paved roadway on the east side of the Powerhouse. Approximately 70 percent of this area is paved with a small vegetated area located immediately adjacent to the intake canal. Significant Materials None. Discharge Controls None. M Outfall SW008A (Abandoned) This outfall is a 12 inch diameter cast iron pipe identified during site reconnaissance. After an exhaustive search no contributing drainage area could be identified. Outfall SW009 (Drainage Area 9) Discharge Structure: 36 inch diameter CMP Location: Intake Canal Coordinates: 350 35'51" N 800 57'48" W Drainage Area: 3.7 acres Impervious Area: 50% Area Description The drainage area is comprised of portions of the Powerhouse roof, Units 3 and 4 precipitators, FGD system duct work, ID Fan Control House, paved yard areas, and vegetated embankment slopes located on the south and east side of the Powerhouse. The total roofed area is approximately 68,000 square feet. Paved plant yard areas cover approximately 2.2 acres and contain 600 feet of paved roadway. Vegetated embankments slope down to the plant yard in the south and east region of the drainage area. Office trailers, equipment, and materials are stored temporarily within the SW009 drainage area during plant outages. Four transformers associated with operation of the ID fan are located in this drainage area. These transformers are situated within secondary containment pits with open drains that discharge into Sump #2. A total of 128 small transformers containing mineral oil are located on the Units 3 and 4 precipitator roof. The largest of these transformers contains 105 gallons of mineral oil, with the total quantity being 13,152 gallons. The SW009 drainage area also contains the transfer sump that receives stormwater runoff from the FGD facility and subsequently discharges into Sump #2. The transfer sump has engineered controls in place to minimize the likelihood of an overflow event. An overflow would result in the sump contents being discharged through SW009, however, no overflows have occurred from the transfer sump since its installation. SW009 is also the discharge for NPDES Outfall 003 (ID fan non -contact cooling water). SW009 and NPDES Outfall 003 share the same inlet. The ID Fan Control House houses electronic equipment that controls the Unit 4 variable speed ID fans. The electronics must be air conditioned, and the non -contact condensate water from the air conditioner's heat exchanger is discharged through SW009. This discharge essentially runs continuously. Sampling collection from the outfall during high lake levels may not be feasible. Significant Materials / Controls Oil: The Units 3 and 4 precipitators have 128 small transformers on the roof containing mineral oil. The largest transformer contains 105 gallons of mineral oil, with the total quantity being 13,152 gallons. Inert Materials: Office trailers, equipment, and materials are stored temporarily within the SW009 drainage area during plant outages. Discharge Controls None. 7 Outfall SW010 (Possibly Abandoned)) Discharge Structure: 36 inch diameter CMP Location: Discharge Canal Coordinates: 350 35'43" N 800 57'53" W Area Description This outfall was/is the discharge pipe from an oil trap tank located south of the Powerhouse. This outfall is believed to be abandoned and all stormwater runoff from this contributing drainage area (Drainage Area 10) is believed to be part of Drainage Area 1A and directed to the Sump #1 and subsequently pumped to the ash basin system (reference Remaining Drainage Area Descriptions on page 11). The facility is currently investigating to confirm the status of this outfall. Outfall SW011 (Drainage Area 11) Discharge Structure: 24 inch diameter CMP Location: Discharge Canal Coordinates(manhole): 350 35'42" N 800 57'53" W Drainage Area: 0.8 acre Impervious Area: 1% Area Description The SW011 drainage area is comprised of a vegetated plant yard area on the west side of the plant entrance road. The drainage area contains the plant raw water storage tank and a small propane -fired generator. Approximately 160 feet of the covered FGD limestone and gypsum conveyors crosses through the drainage area. SW011 is currently inaccessible due to the steep bank covered in heavy vegetation. Significant Materials Gypsum and Limestone: Approximately 160 linear feet of the covered FGD limestone and gypsum conveyors cross through the SW011 drainage area. Sandblasting and Painting: Maintenance activities such as painting may be performed on the tank. During these very rare occurrences, the stormwater inlet would be temporarily blocked and the area surrounding the tank would be covered. Discharge Controls None. Outfall SW012 (Drainage Area 12) Discharge Structure: 18 inch diameter HDPE pipe Location: Intake Canal Coordinates(inlet): 350 35'51" N 800 57'46" W Drainage Area: 2.0 acres Impervious Area: 10% Area Description The SW012 drainage area is comprised of graveled yard areas and vegetated slopes located north and west of the FGD facility (east of the Powerhouse). The FGD facility ductwork crosses 0 over the southern end of the drainage area. SW012 discharges from an elevated outfall structure directly into the intake canal. During high lake water levels, access to this outfall is possible only by boat. Significant Materials Inert Materials: Inert equipment and materials may occasionally be stored on the gravel yard within the SW012 drainage area during FGD facility outages. Discharge Controls None. Outfall SW012A (Drainage Area 23) Discharge Structure: 18 inch diameter HDPE pipe Location: FGD embankment slope Coordinates: 350 35'55" N 800 57'46" W Drainage Area: 1 acre Impervious Area: 0% Area Description The SW023 drainage area is comprised entirely of a graveled yard located north of the FGD facility. During construction of the FGD facility, Outfall SW012A was installed as a slope drain that discharged into a sediment basin at the base of the FGD embankment slope. SW012A now discharges into a riprap-lined basin that subsequently discharges into a shallow swale that flows northeasterly and eventually into the station intake canal. SW012A does not discharge directly to surface waters. Significant Materials Inert Materials: Inert equipment and materials may occasionally be stored on the gravel yard during FGD facility outages. Discharge Controls Riprap-lined basin. Outfall SW022 (Drainage Area 22) Discharge Structure: 18 inch diameter CMP Location: Discharge Canal Coordinates: 350 35'44" N 800 57'52" W Drainage Area: 1.3 acres Impervious Area: 40% Area Description The SW022 drainage area is comprised of a portion of the paved FGD facility access road, paved road ditch, and vegetated embankment slopes. Significant Materials None. Discharge Controls None. 9 Outfall SW023 (Drainage Area 23) Discharge Structure: 18 inch diameter HDPE pipe Location: FGD embankment slope Coordinates: 350 35'59" N 800 57'40" W Drainage Area: 1.7 acre Impervious Area: 0% Area Description The SW023 drainage area is comprised entirely of a graveled yard located north of the FGD facility. During construction of the FGD facility. Outfall SW023 was installed as a slope drain that discharged into a sediment basin at the base of the FGD embankment slope. SW023 now discharges into a riprap-lined basin that subsequently discharges into a shallow swale that flows northeasterly and eventually into the station intake canal. SW023 does not discharge directly to surface waters. Significant Materials Inert Materials: Inert equipment and materials may occasionally be stored on the gravel yard during FGD facility outages. Discharge Controls Riprap-lined basin. 10 REMAINING DRAINAGE AREA DESCRIPTIONS Marshall Steam Station has several non-stormwater discharge drainage areas that drain via gravity flow into the ash settling basin, or discharge into station sumps that subsequently pump to the ash settling basin. All of the areas north of the primary coal delivery rail lines gravity drain to the ash settling basin. All drainage areas that discharge into station sumps are located south of these rail lines. Yard Sumps There are three station yard sumps located on the property: Yard Sump #1 Yard Sump #1 is located north of the Powerhouse and immediately west of the coal transfer house. Sump #1 collects runoff from approximately 36 acres comprised of three separate drainage areas (designated 1A, 1 B and 1 C, as described below). Sump #1 also collects effluents from the turbine room sumps located inside the Powerhouse. These turbine room sumps essentially collect effluents from various areas and equipment located in the western half of the Powerhouse. Sump #1 pumps directly to the ash settling basin. Rarely occurring emergency overflows for Sump #1 are discharged through stormwater outfall SW007 as NPDES Outfall 002A. Yard Sump #2 Yard Sump #2 is located immediately east of the service building. Sump #2 collects runoff from 39.2 acres comprised of two separate drainage areas (designated 2A and 2B, as described below). Sump #2 also collects effluents from the boiler room sumps located inside the Powerhouse. These boiler room sumps essentially collect effluents from various areas and equipment located in the eastern half of the Powerhouse. Cooling water for all ID fan bearings is processed through Sump #2. Sump #2 pumps directly to the ash settling basin. Rarely occurring emergency overflows for Sump #2 are discharged as NPDES Outfall 0028. Transfer Sump The Transfer Sump is located southeast of the Powerhouse. Stormwater from Drainage Area 2B is collected in a detention pond that discharges into the Transfer Sump. The Transfer Sump pumps to Sump #2. Yard Sump Drainage Area Descriptions The following drainage areas discharge into the station sumps: Drainage Area 1A (discharges to Sump #1) Drainage Area 1A encompasses 15.0 acres comprised of Powerhouse yard areas immediately west and southwest of the Powerhouse. Located within this drainage area are the Units 1 through 4 main step-up transformers, the FGD T1 and T2 transformers, and five other large transformers. All these large transformers contain mineral oil and are located within curbed containments with open drains to Sump #1. Also located with this drainage area are two 500,000 -gallon fuel oil storage tanks (only one of which is in service), three 46,000 -gallon urea storage tanks, and the tanker fuel oil unloading area for filling of the 500,000 -fuel oil tank in operation. The five tanks are located within an earthen containment dike that is drained via a siphon system that discharges into Sump #1. The tanker unloading area is paved and curbed to contain any fuel oil release, and has open drains that discharge into Sump #1. Drainage Area 1A also includes a diesel fuel -powered air compressor within a closed concrete containment 11 basin, an emergency diesel generator with integral containment, approximately 560 linear feet of the covered FGD limestone and gypsum conveyors, vegetated areas, vegetated slopes, approximately 0.5 mile of the paved plant entrance road, and approximately 0.5 mile of rail lines. Approximately 12 percent of Drainage Area 1A is impervious. Drainage Area 1B (discharges to Sump #1) Drainage Area 1 B encompasses 4.7 acres comprised of yard areas north of the Powerhouse. This drainage area includes the coal handling facilities, chemical storage, compressible gas storage, and the roofs of the coal handling facilities, storage sheds, and the coal -handling tractor shed. The 1 B drainage area also includes a 1,000 -gallon gasoline tank with integral containment and associated tanker unloading activities, four small transformers containing mineral oil, a tractor and bulldozer refueling station beside the tractor shed, various petroleum tanks within containments inside the tractor shed, and various small petroleum containers in the coal handling area. Approximately 35 percent of the drainage area is impervious. The drainage area also includes vegetated embankment slopes, approximately 0.5 mile of railways, and approximately 0.25 mile of paved roadways. Drainage Area 1C (discharges to Sump #1) Drainage Area 1 C is located west of the Powerhouse and encompasses 15.5 acres that includes the FGD limestone stacker operation. All stormwater runoff is collected within a stormwater detention basin located at the east end of the drainage area. The basin discharges into Sump #1. Drainage Area 2A (discharges to Sump #2) Drainage Area 2A encompasses 7.7 acres and includes most of the Powerhouse roof and yard areas between the Powerhouse and the intake canal. Approximately 90% of the drainage area is impervious. The drainage area includes the Units 1 and 2 precipitators, Unit 3 SCR, and the ID fans. The drainage area also includes numerous small transformers containing mineral oil located on top of the precipitators, four ID fan transformers within containments with open drains to Sump #2, the Sump #2 control transformer, a 900 -gallon used oil tank and associated tanker unloading, and a 5,000 -gallon sulfuric acid tank within valved containment. The 2A drainage area also includes ash sluice piping located within concrete trenches fitted with open drains to Sump #2. Drainage Area 2B (discharges to Sump #2) Drainage Area 213 encompasses approximately 21.7 acres of the FGD facility located east of the Powerhouse and east of the intake canal. The drainage area includes the FGD facility, the FGD Wastewater Treatment Plant, and all surrounding paved access areas. The drainage area includes several transformers containing mineral oil located within valved containment basins, a small diesel -powered quench pump within containment, and overhead limestone and gypsum conveyors. All stormwater runoff from Drainage Area 213 is routed into a detention pond located at the southwestern corner of the drainage area. This collected stormwater discharges into the Transfer Sump that subsequently pumps to Sump #2. Ash Settling Basin Drainage Areas The following drainage areas are located within the ash settling basin watershed and discharge via gravity flow to the ash settling basin: Drainage Area 13 — FGD Gypsum Radial Stacker Drainage Area 13 encompasses approximately 11.6 acres and is located in the southern area of the ash settling basin watershed. This drainage area includes the FGD gypsum radial stacker 12 operation and portions of an adjacent soil borrow area. Stormwater runoff from this area enters a detention basin before discharging into a tributary of the ash settling basin to the north. Drainage Area 14 — Soil Borrow Area Drainage Area 14 encompasses approximately 9.4 acres and is located west of Drainage Area 13. This drainage area includes the remaining portions of the soil borrow area. Stormwater runoff from this area enters a detention basin on the west side of the drainage area before discharging into a small creek that flows to the ash settling basin. Drainage Area 15 — FGD Landfill Drainage Area 15 encompasses approximately 21 acres and is located in the western area of the ash settling basin watershed. This drainage area includes the FGD residue landfill. Stormwater runoff from this area enters a detention basin at the southeastern edge of the landfill and is subsequently piped via gravity flow to the ash settling basin. This landfill also includes FGD wastewater treatment sludge, asbestos, flyash, bottom ash, mill rejects, and construction and demolition debris. Drainage Area 16 — Coal Pile Drainage Area 16 encompasses approximately 37.6 acres and is located in the southern area of the ash settling basin watershed. This drainage area is comprised entirely of the station coal storage pile. Stormwater runoff from this area enters perimeter ditches that discharge into the ash basin. Drainage Area 17 — Sanitary Wastewater Lagoon Drainage Area 17 encompasses approximately 4.6 acres and is located east of the coal pile in the southern area of the ash settling basin watershed. This drainage area is comprised of the sanitary wastewater treatment lagoon and surrounding area. Stormwater runoff discharges into the ash basin to the north. Drainage Area 18 — FGD Constructed Wetland Treatment System Drainage Area 18 encompasses approximately 33.2 acres and is located west of the ash settling basin. This drainage area is comprised of the constructed wetland treatment system (CWTS) designed to treat wastewater from the FGD solid removal wastewater treatment system. Stormwater runoff from the CWTS area flows into the adjacent ash settling basin. Drainage Area 19 — Bottom Ash Operation and Pyrite Operation Drainage Area 19 encompasses approximately 53.8 acres and is located north of the coal pile. This drainage area includes the bottom ash operation and recovery of coal from pyrites. All stormwater runoff from this area is routed via ditches into the ash settling basin. Drainage Area 20 — Closed Ash Landfill Drainage Area 20 encompasses approximately 58 acres and is located in the northern area of the ash settling basin watershed. This drainage area includes the closed and capped ash landfill. All stormwater runoff from this area is routed via ditches into the ash settling basin. Drainage Area 21 — Beneficial Structural Fill Drainage Area 21 encompasses approximately 84 acres and is located in the northern area of the ash settling basin watershed. This drainage area includes the active beneficial ash structural fill. All stormwater runoff from this area is routed via ditches into the ash settling basin. 13 IDENTIFICATION OF NON-STORMWATER DISCHARGES A visual assessment for non-stormwater discharges was conducted on August 28, 2014. Each outfall was observed for outflow after a period of at least 72 hours of dry weather. NPDES discharges of process water were excluded. There were no non-stormwater discharge flows observed. Outfall SW007 was submerged and could not be assessed. MONITORING AND SAMPLING There are 14 identified active stormwater outfalls proposed for stormwater permitting at the Marshall Steam Station. Outfall SW007 is submerged and not able to be sampled at the discharge. Sampling of Outfalls SW009 and SW012 may not be feasible at the discharge during periods of high lake levels. Outfall SW011 is located on the steep discharge canal embankment and not currently accessible. Outfall SW010 is believed to be abandoned. 14 O Lw= - ' kwooi y • • ' 3 •. r �¢c°`�� .. mac. � r7ow-W44-011, ���D ••eio•.� asa , y► . Sher600rne - SherriVVsFord Rd � `c Catawba County, North Carolina a o . t m ar'`� o • 11 _ e c � e� fa f �' f1 \ a_ j\ 1 prd El, n�POIn1'Rd r 8a0-fLn or. Viaw or C o k Dr 1 r. I i !O J yI• r f ' 7v!4F-Ar --- - ----- - f :. '_• x. • �a,•,i ��amPlant r _. �' `�s(T�j,{! 1 l ti a� y •0. �t I l a�a 1 a r S� 1�9 � PIiM • �' . - HoldsrlawCreek ea++ Pn •� •�` t (. • r 00 MARSHALL _ ,.. STEAM STATION ice 110 b „ �+Rd ��'ARIMeaF1�Nyrc,, _ RivP�� Fa - fid, a - d g u 'Donald PA .,., ~'� f.' �� _SA1Findtlf0 ` ` LAS, _�^ • ya `°bay Rd Tara Rd o� q %rel Ln' --.mo- Reid Crrde i, HoYdscvd• _ Goy �'t - l f' �. 1 : L a k' e woo • � a I ¢c - aM,1 inch `I fid. .. !_ I � -•� 2,000 oa, qa ry o m ,�15 - 0 1 1 1 1 4,000 tiJ F z F E IC N 0 1 2 3 4 5 6 7 8 DRAWING N0. REV. p> <♦ �\ I / l /// \_/ //// ' _- _ ♦' i �1 1111 / / /// 'I, 1 ,' r \\ / / r /// ,"/ ! , ♦- ♦' ` \ �►♦ III, / DRAINAGE AREA OUTFALL DESCRIPTION RECEIVING WATER BODY \ ,/ , \\ 11 / // \; \ \ ♦'► - - - / ) )♦ I ; _ t . \ l _ \ _\\ \ \ . , / / 1* 18"0 CMP LAKE NORMAN 1A 18"0CONCRETE LAKE NORMAN _ \ \ r ♦'♦ I 1 �I \ \ \1 \ \ �/ 2* 24"0 CMP LAKE NORMAN 1��1�/ \`\\ \ //„ Ilr I/, _l \1\\ \\ \, \/ I , c 1 tr - l r J - 1\ I I I I I __ ` f X11 ASH LANDFILL ` a \ / 3 DITCH WITH RIP RAP LAKE NORMAN \ ` .! _ -'\ 1 \ 1 1 1 11, !/ ' ,r\ \\\\ " ! ■ / / 1 0 r 4 36110 HDPE INTAKE CANAL \ \ 18 ■\-\ \ /� 1 / /I I ', _ I III / ,_ ` 11 \(°' \ 1\I/J/l /'i �\1\\\\ �� \�\ (,'♦/ 1 /JJ) \\\\` I ` / ■ ``� IIII / /1 I \O - „ \ \ • I ASH BASIN , 1 j 1 1 ' S 18"0 CONCRETE INTAKE CANAL II II // / ,\\ 11,////, /, -_ / I _-\\\\\ , r/ / 1 r, 11 \`_ !\ �, , __ _ ♦ , ♦ \ I\\1 \\ FGD CONSTRUCTED \ rr ri^ / I I \ 6 18"0CMPINTAKE CANAL 8� WETLAND TREATM T r / / \ 7AND YARD SUMP #150 60" CMP INTAKE CANALSYSTE\ _ OVERFLOW ph %� t \ ,__ ! \ \ / // \__ l/ % // - \ �\ ♦ / / I 1 �/ / ' /// - \ OUT LL �.V \ � -� , / _ r !/ - � � \ / / � \ I / , ; \\ ♦ ) / // // \ r , 8 8"0 CMP INTAKE CANAL rir \ \ ^\ - I\\1 \ `_ \- / l r J 1 \ 111 l 1�� o- \` _ \� \\ ♦ , r / DISCHARGE TOWER // r // TF L SSV 8A** 12"0 CAST IRON PIPE INTAKE CANAL I \� a-- \1 \ •� \ \\\ /r /ri I I ! - \ , `� /r �l 11/r I 9 36"0 CMP INTAKE CANAL ♦♦� ♦♦ l.\ \``. : -%�' _ I ` _',! 11 / \`. I \ \ `.' / 1 lit / ♦ `\\\`'� \\/l i /il 10*** 30"0 CMP DISCHARGE CANAL ♦ \� \� __ /// I l / \ g25 ,, /_ \ \ _ ! ///r \ . ♦ o Jill\ , ♦ - / l / 1 \ 11 24"0 CMP DISCHARGE CANAL ♦ \� ����`�_� , �'I�`�_,_'�'/� \ \\`\ ``'� ` /rr rii/7 12 18"0 HDPE INTAKE CANAL -�`�\- `� \ _ ` i\ \ - t i w \\\ / rel /ii 1 I / / ! / 12A 18"0 HDPE INTAKE CANAL ♦�I���'%=�� �,`'1\� \\'/;' ! \'\\ \\\ ,rr rr �i .."�'/'/''/ IV 22 18110 CMP INTAKE CANAL ■ ♦♦ ,_ \1,� `1 `i/:� ,`//' __t�\ ��\\\` ASH LINES 'r' \ ir/ � \ , ,! , ,// 23 18"0 HDPE INTAKE CANAL ♦ \ ♦ ��/ _ „ / \- \- \ \�� ♦♦ \ I ,! - \ \`\ OTHR06GH 4 J /� p� , II /I// / ,- EXISTING OUTFALLSTO BEABANDONEDAND REPLACED WITH NEW HDPEOUTFALLS. ♦ ♦ -�\`` / \ \1 \ CA ♦ FGD LANDFILL ♦_ / /,',' / ! / ' ® I \ �' `> 1_ _' 1 \ \\ \ \// ' /i' ', /,/� / 1',r,l I ***POSSIBLY ABANDONED ♦ / �O // / / \ r - / / ` \ / ' I- \ / r\ \ I 1 1 /SANITARY ♦ / , / \ r , it`WASTEWATER I , / I`-/- /� / j ' ) \- ' A M N ♦ ♦♦a ,-,///// /� ,/ //// I _ \ \ �,/ ///\\ \�` __\ f KEY NOTE: ♦♦♦ _- �/,r,\,..',' ,//, :' /i/ \���%i /�"• \\ / - y r \ LAGOON ♦ ♦ \\ '' /1 / ,�/ / 's! ,i// ` `__ / fy \ ``\ / � l / rl/// , � \ �\\ \ �I lI IIII Ir I I I ♦ ♦♦ '' �_''^//�__-/84 DRAINAGE AREA SEDIMENT BASIN`,-- - `" y \ ♦ ♦ � \ _ �, '/ �,\1 \ \\ \, �iii yy � ♦ \\ / Q Q- / Gi/ \ ` \ I - �1 \ 1 I I II ` t PIPING INLET SEDIMENT BASIN ♦ ,y i �rj l i . \\ r / _ - - - - \I`!,/ J J I I ,, \ \ fit[ ♦ i 1 7 0 �c/ I ,'irr . i%ice it I lit /: I\ I c r / r -' _ \1 \.�\��; \ I 1 I \ I I / r /' 11 I l// /II 1 I I I ♦ � i = Q 11 IIII1II1I`\I1I 1 1 \\\\�1 _ `J �♦ ♦ ''/ ' O16 I-\ 1\\♦\ ♦\ ♦ ,' / / VLC�/Q/,/� -/ ��// - / r7�! / ♦ //�/,,,�i, ""'' ,i/// //ir/r,/1/ ' `\ 1\Iu 1111I 1l1 1111 II lI j / f\ R 1 \1/ / \11 /II I / lI1rI IIn1/l / I1 11111 ll//11 / ///)\\11111 !I/ YEDI ! BIt II I 1 1 II Il I 1111 COAL PILE i Iill i11jIII 582 4F / - a ■� I _ / \ \�. )\\� \� ♦ ♦ // / '/i //% _, ■ I, ♦ ♦ / � / \ ■' GYPSUM ADA • / ♦♦♦ ♦��f _/ f}TLO/V4 , I11 IIII 1\\\\11\ l� \ • OUTFALL SW007 r ♦ \ �///�/ r/� /.�, 85 I III I'll \111111 ST KER ,�R\ \ • NPDES OUTFALL 002A ♦ ♦ l ' ' I \— \ \ � / ♦ // / �� ��'v! ��AL,�, � 1 / / / / / / / III I 41# `�\\ 1� \\\\� \ ♦1 1\/ ♦♦ ♦ i �J �����iiiii 1 1111\ I �-011 \\v�♦\ \ YARD SUMP #1 ♦ ♦ //�//r/ /!///1Ii ♦ /////!/d/// /l ! / !/ I) // / ♦ J 1111 II'I, \ OI I 1 • r \ DRAINAGE AREA 1B ♦ /.. / IIII l I l 1 / �/ // b/, i I I (1 III / !/ / / ♦ �„ ./.. , 1, I , I 1 / l - ■/, � '�" / / I / / 1 ♦ I \ IIIc J r 111 ) \\ ♦♦ ��.;% ' I Up �1 - .1111 III ,� ' ,-����7�(� T� �\ \ �^ 111 f'll // //// ■ \\ mid♦ � 6 �j �V(V008A�,/ =` _ _\___- ♦ �__`� � /NEU,7�% r/lr //v 23 O, r�-���i������•==-=_'.,' I■♦♦� j IV 16 ♦ I%i/iZJTf�AEt♦SW�1 # : 8!���,'!, ,,-♦®�� III\'�♦• 15 --_==___-��-_==_=_==__ = '- ♦• � • i i ,YARD SUMP #2♦♦ ♦♦ 00 OUTFALL \ OUTFALL SWO08 DRAINAGE - 1 ' / I ii I\ ' \� ♦♦♦♦ YARD SUMP #Z • 18 AREA 2B ' I\ YARD SUMP #1 �1;I \\ , ,' i DRAINAGE �O ■ —OUTFALL SWO12 ■ DRAINAGE AREA 1 C \`\ ` '' i YARDDRAINAGE #1 AREA 2A O I ' �' 13 U _ � LIMESTONE STACKER ` � - ♦ 0 � 12 ♦_ f _\ A � ♦ , �`s AREA 1A a \ DRAINAGE AREA_,, ♦ ■ �� 00 ♦♦♦ 0 \ M 10 OUTFALL SWO09/SWITCHYARD \\ 11 NPES OUTFALL 0g® �, `*u V/_ \ \ 4 �0 ■1 ! ♦ _ \4 Ci ��, \ \ •� _ � �► I I I Ill \ -_- \ \`\ 1 "' � -� - ♦ III 11\ _ 3 /, " (� - - 22 - \ ♦♦' --- _\\ '�. � I 1 11111If \\\\\\ '�' / _%�� ��/ _ AV AAA t `-- ♦♦ .�. /�\M - iJ� 11/v A\ \ \_ �v\ /1 11 IIII X1111 /, ! / / \� / . _�_ ♦ 0 M _/ , \ / / IIII I { �\-- � 1 ! - / I ,III 111 Il 1 \ \ \ r\ /-UIF,AL SW022; = -' // \ �' ' III IIIr11 j �_ <__ ♦ ' \\ -\ \ / / I \ \ S I II _, 1/ l - / / Ill IIII \�\\ - -\\it : lQ `\ \1\�` %%�- \\ r� - \ _��\ Ll\ A I�1LD)t rl// �I� --'/ //��l /�l IIIII /\ _ \� \\ \ -'i 25 '' V `\ \ -7� �c-\ _ '///h/j \ \800 ' III 1,l III PLAN SCALE: 1 "= 400' � �� NOTE: DRAINAGE AREA 1Q POSSIBLY PART OF YARD'�` SUMP #1 DRAINAGE ARE k, NN 400 �. \ \ \ I 1 J LEGEND: PUMP TO ASH BASIN DRAINAGE AREA BOUNDARY H G F STRUCTURE LEGEND: E O ELEVATED WATER TANK 2O FUEL OIL UNLOADING AREA O FUEL OIL TANKS 4O UREA TANKS 5O COMMUNITY BUILDING © PRECIPITATOR UNITS 3 & 4 7O POWERHOUSE UNITS 1-4 ® GYPSUM & LIMESTONE CONVEYOR BELTS D 90 SCR AREA 10 STORMWATER TRANSFER PUMP 11 ELECTRICAL BUILDING 12 BALL MILL 13 REAGENT FEED TANKS 14 SCRUBBER SITE 15 SERVICE BUILDING AND WAREHOUSE 16 SUMP #1 17 SUMP #2 C 18 INTAKE 19 AMMONIA TANK FARM 20 CONSTRUCTED WETLAND TREATMENT SYSTEM 21 LIMESTONE AREA STORMWATER BASIN 400 0 400 800 SCALE IN FEET DRAWN BY: CIVIL DUKE ENERGY CAROLINAS, LLC MARSHALL STEAM STATION DESIGNED BY: MECHANICAL A SITE PLAN CHECKED BY: ELECTRICAL STORMWATER OUTFALLS APPROVED BY: DATE: HDR Engineering, Inc. of the Carolinas License Number: F-0116 SCALE: DRAWING/SHEET N0. REV. 440 S Church Street, Suite 1000 Charlotte, NC 28202-2075 PE SEAL NO. DATE REVISION I DRN IDSGN CHKIDJAPPRI CIVIL I ELEC IMECHI PROJECT NUMBER: 000000000234104 1 "=400' SHEET 1 - 1 1 2 3 4 1 5 6 1 7 1 8 A