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HomeMy WebLinkAboutNC0026051_Application_20150910D Engineering and I� • Environmental Services Utility Division —Triangle WWTP September 1, 2015 NCDENR/DWQ Attn: NPDES Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Re: NPDES Permit Renewal Application NCO026051 Triangle Wastewater Treatment Plant Durham County Dear NPDES Unit Staff: RECEIVEDIDENRlDWR SF� , 0 015 Water Quality Permitting Section Durham County requests renewal of the NPDES permit for the Triangle Wastewater Treatment Plant, NC0026051. The current permit requires a renewal request 180 days prior to expiration. As the current permit expires on April 30, 2016, the renewal request is due by November 2, 2015. This submission meets that requirement. During the current permit period, Durham County has continued to produce an "Exceptional Quality" effluent and met our Jordan Lake nutrient load requirements. The effect of nutrient reduction at the Triangle Wastewater Treatment Plant has been documented by the US Geological Survey in their Scientific Investigations Report 2013-5007, "Relation of Watershed Setting and Stream Nutrient Yield at Selected Sites in Central and Eastern North Carolina, 1997-2008". We plan to continue producing "Exceptional Quality" nutrient reduced effluent during our next permit cycle. With respect to the future permit, we request the following modifications: 1. Deleting the instream monitoring requirement. We primarily wish to delete these monitoring locations for safety reasons. To obtain representative data, these streams must be sampled from bridges on Sedwick Road and Grandale Road. Both of these roads are heavily traveled and only two lanes wide. Additionally, the data is practically valueless. This facility discharges to a creek designated as a zero 7Q10 stream, and the instream data gathered for this permit is not used to determine wastewater treatment plant effluent limits. As the wastewater treatment plant discharge is the predominant discharge to the stream, the effluent quality of the Triangle Wastewater Treatment Plant is indicative of stream quality. 5926 NC Highway 55 East, Durham, North Carolina 27713 (919) 560-9033 1 Fax (919) 544-8590 i dconc.gov Equal Employment/Affirmative Action Employer Flowdata at the downstream monitoring point, Attachment 1, shows the impact of the diurnal variation in wastewater treatment flows to this creek and substantiates that this is an effluent dominated creek. As the instream data is of de minimus value and obtaining the data is exceptionally dangerous, we request that the Director waive the instream monitoring requirement in accordance with 15A NCAC 02B .0508 (b)(1) as the objectives of instream sampling can be achieved by other means. The means is to consider the wastewater treatment plant effluent to be indicative of stream quality at our discharge point. 2. Nutrient Load Limit Increase. Durham County has recently allowed the connection of a direct discharge sand filter system for a single family residence to our collection system with treatment at the Triangle Wastewater Treatment Plant. The site is: a. Nancy C. Mallett Trust, 4423 Hopson Road, Morrisville, NC 27560, with an existing 3 bedroom sandfilter system which discharged into a storm sewer at a neighboring apartment complex. i. There were numerous complaints about the discharge from this system and Mack Wiggins with the Raleigh Regional Office can provide details about the system problems. ii. This site is approximately 10,000 feet from the Triangle Wastewater Treatment Plant. iii. The stormwater pipe discharge is to a tributary upstream of the Triangle Wastewater Treatment Plant effluent discharge point. iv. Based on the April 2, 2015 "Remedy Discharging Sand Filters" guidance with a 2.2 person occupancy for a three bedroom house and a 7.4 #/cap/year TN and a 1.8 #/cap/year TP credit rate, we request a 16.28 pound per year total nitrogen and a 3.96 pound per year total phosphorus load limit increase. Additionally, Durham County has allowed the connection of two commercial septic systems to our collection system at the Triangle Wastewater Treatment Plant, the sites are: b. Durham Wildlife Club, 3616 Hopson Road, Morrisville, NC 27560 with an 1860 gallon per day existing septic system. i. The site is approximately 5,000 feet from the Triangle Wastewater Treatment Plant. ii. Runoff from this site is to a tributary of Northeast Creek downstream of the Triangle Wastewater Treatment Plant effluent discharge point. iii. Based on my best professional judgement on the failure rates of septic systems in Triassic Basin Soils, I would recommend a credit equal to at least 25 percent of the credit for a discharging sand filter. This discharge flowrate is equivalent to a 31 person capita rating. At 7.4 #/cap/year TN and 1.8 #/cap/year, we request a 57.35 pound per year total nitrogen and a 13.95 pound per year total phosphorus load limit increase. c. Stone Center of Carolina, 6515 NC Highway 55 East, Durham, NC 27713, with a 400 gallon per day existing septic system. i. The site is approximately 3,400 feet from the Triangle Wastewater Treatment Plant. ii. Runoff from this site is to a tributary of Northeast Creek downstream of the Triangle Wastewater Treatment Plant effluent discharge point. iii. Based on my best professional judgement on the failure rates of septic systems in Triassic Basin Soils, I would recommend a credit equal to at least 25 percent of the credit for a discharging sand filter. This discharge flowrate is equivalent to a 6 person capita rating. At 7.4 #/cap/year TN and 1.8 #/cap/year, we request an 11.1 pound per year total nitrogen and a 2.7 pound per year total phosphorus load limit increase. A table summarizing our load request is below: Current Mallett Durham Stone Total % Nutrient Limit Trust Wildlife Center Request (#/year) (#/year) (#/year) (#/year) (#/year) Increase Nitrogen 111,207 7.4 57.35 11.1 111,282 0.067% Phosphorus 8432 3.96 13.95 2.7 8453 0.24% Durham County recognizes these are relatively small increases in our allowable nutrient load; however, Durham County is interested in validating the nutrient credit program to justify larger future investment in the connection of discharging sand filters and septic systems to our collection system. Durham County staff, and especially Stephanie Brixey, have expended a significant amount of time and effort to provide a complete and accurate permit application. If additional information or clarification is needed, please feel free to contact me at (919) 560-9035. As our draft permit is prepared, we would like to meet with the permit writer prior to fact sheet preparation or draft permit issuance. Sincerely, hP Iltearce, PE Utility Division Manager/POTW Director Enclosures co: JRP/cs Jay Gibson, E&ES Director Stephanie Brixey, Utility Division Compliance Manager 5926 NC Highway 55 East, Durham, North Carolina 27713 (919) 560-9033 1 Fax (919) 544-8590 1 dconc.gov Equal Employment/Affirmative Action Employer FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 I Renewal Cape Fear FORM 2A NPDES FORM 2A APPLICATION OVERVIEW NPDES APPLICATION OVERVIEW Form 2A has been developed in a modular format and consists of a `Basic Application Information" packet and a "Supplemental Application Information" packet. The Basic Application Information packet is divided into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental Application Information packet. The following items explain which parts of Form 2A you must complete. BASIC APPLICATION INFORMATION: A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.6. A treatment works that discharges effluent to surface waters of the United States must also answer questions A.9 through A.12. B. Additional Application Information for Applicants with a Design Flow 2 0.1 mgd. All treatment works that have design flows greater than or equal to 0.1 million gallons per day must complete questions BA through B.6. C. Certification. All applicants must complete Part C (Certification). SUPPLEMENTAL APPLICATION INFORMATION: D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets one or more of the following criteria must complete Part D (Expanded Effluent Testing Data): 1. Has a design flow rate greater than or equal to 1 mgd, 2. Is required to have a pretreatment program (or has one in place), or 3. Is otherwise required by the permitting authority to provide the information. E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E (Toxicity Testing Data): 1. Has a design flow rate greater than or equal to 1 mgd, 2. Is required to have a pretreatment program (or has one in place), or 3. Is otherwise required by the permitting authority to submit results of toxicity testing. Industrial User Discharges and RCRAICERCLA Wastes. A treatment works that accepts process wastewater from any significant industrial users (SIUs) or receives RCRA or CERCLA wastes must complete Part F (Industrial User Discharges and RCRAICERCLA Wastes). SIUs are defined as: 1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations (CFR) 403.6 and 40 CFR Chapter I, Subchapter N (see instructions); and 2. Any other industrial user that: a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works (with certain exclusions); or b. Contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic capacity of the treatment plant; or C. Is designated as an SIU by the control authority. G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer Systems). ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION) EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 1 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear BASIC APPLICATION INFORMATION PART A. BASIC APPLICATION INFORMATION FOR ALL APPLICANTS: All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet A.I. Facility Information. Facility Name Triangle Wastewater Treatment Plant Mailing Address 5926 NC Hwy 55 East Durham, NC 27713 Contact Person Joe Pearce Title Utility Division Manager I POTW Director Telephone Number (919)560-9035 Facility Address 5926 NC Hwy 55 East (not P.O. Box) Durham, NC 27713 A.2. Applicant Information. If the applicant is different from the above, provide the following: Applicant Name Mailing Address Contact Person Title Telephone Number ( ) Is the applicant the owner or operator (or both) of the treatment works? ® owner ® operator Indicate whether correspondence regarding this permit should be directed to the facility or the applicant. ❑ facility ® applicant A.3. Existing Environmental Pemrits. Provide the permit number of any existing environmental permits that have been issued to the treatment works (include state -Issued permits). NPDES NCO026051 PSD UIC Other WQCS00038, W00032821, W00011396 RCRA Other NCG110054 A.4. Collection System Information. Provide information on municipalities and areas served by the facility. Provide the name and population of each entity and, 8 known, provide information on the type of collection system (combined vs. separate) and its ownership (municipal, private, etc.). Name Population Served Type of Collection System Ownership Durham County 3,722 Separate Durham County City of Durham 7,117 Separate City of Durham Total population served 10,839 EPA Form 3510-2A (Rev. 1-99). Replaces EPA fortes 7550-6 8 7550-22. Page 2 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 I Renewal Cape Fear A.S. Indian Country. a. Is the treatment works located in Indian Country? ❑ Yes ® No b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows through) Indian Country? ❑ Yes ® No A.S. Flow. Indicate the design flow rate of the treatment plant (i.e., the wastewater flow rate that the plant was built to handle). Also provide the average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period with the 12r` month of "this year" occurring no more than three months prior to this application submittal. a. Design flow rate 12 mgd Two Years Aoo Last Year This Year b. Annual average daily flow rate 6.27 6.83 5.81 C. Maximum daily flow rate 13.43 14.08 12.11 A.7. Collection System. Indicate the type(s) of collection system(s) used by the treatment plant. Check all that apply. Also estimate the percent contribution (by miles) of each. ® Separate sanitary sewer 100 % ❑ Combined stone and sanitary sewer % A.B. Discharges and Other Disposal Methods. a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes ❑ No If yes, list how many of each of the following types of discharge points the treatment works uses: I. Discharges of treated effluent 1 lonel IV Discharges of untreated or partially treated effluent iii. Combined sewer overflow points iv. Constructed emergency overflows (prior to the headworks) V. Other b. Does the treatment works discharge effluent to basins, ponds, or other surface impoundments that do not have outlets for discharge to waters of the U.S.? ❑ Yes If yes, provide the following for each surface impoundment: Location: Annual average daily volume discharge to surface impoundment(s) Is discharge ❑ continuous or ❑ intermittent? C. Does the treatment works land -apply treated wastewater? If yes, provide the following for each land application she: J Location: Number of acres: Annual average daily volume applied to she: Is land application ❑ continuous or ❑ intermittent? Does the treatment works discharge or transport treated or untreated wastewater to another treatment works? M ❑ Yes mgd mgd ® No ❑ Yes ® No EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 3 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear If yes, describe the mean(s) by which the wastewater from the treatment works is discharged or transported to the other treatment works (e.g., tank truck, pipe). If transport is by a party other than the applicant, provide: Transporter Name Mailing Address Contact Person Title Telephone Number ( ) For each treatment works that receives this discham provide the following. Name Mailing Address Contact Person Title Telephone Number ( 1 If known, provide the NPDES permit number of the treatment works that receives this discharge Provide the average daily Bow rate from the treatment works into the receiving facility. mgd e. Does the treatment works discharge or dispose of its wastewater in a manner not included in A.8. through A.8.d above (e.g., underground percolation, well injection): ❑ Yes ® No If yes, provide the following for each disposal method: Description of method (including location and size of site(s) if applicable): Annual daily volume disposed by this method: Is disposal through this method ❑ continuous or ❑ intermittent? EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 8 7550-22. Page 4 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear WASTEWATER DISCHARGES: If you answered "Yes" to question A.8.a, complete questions A.9 through A.12 once for each outfall (Including bypass points) through which effluent is discharged. Do not Include Information on combined sewer overflows in this section. If you answered "No" to question A.8.a, go to Part B, "Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd." A.S. Description of Outfall. a. Oudall number b. Location (Citya town, it applicable) (Zip Code) (County) (State) 35 52' 51" 78 53' 50" (Latitude) (Longitude) C. Distance from shore (if applicable) NA ft. d. Depth below surface (d applicable) NA ft. e. Average daily flow rate 5.1 mgd I. Does this outfall have either an intermittent or a periodic discharge? ❑ Yes ® No (go to AS.%) If yes, provide the following information: Number f times per year discharge occurs: Average duration of each discharge: Average flow per discharge: mgd Months in which discharge occurs: g. Is outfall equipped with a diffuser? ❑ Yes ® No A.10. Description of Receiving Waters. a. Name of receiving water Northeast Creek b. Name of watershed (if known) Cape Fear United States Soil Conservation Service 14-digit watershed code (if known): C. Name of State Management/River Basin (if known): Basin: 03-06-05 United States Geological Survey 8-digit hydrologic cataloging unit code ('d known): d. Critical low flow of receiving stream (if applicable) acute NA cis chronic 0 cis e. Total hardness of receiving stream at critical low flow (if applicable): mg/I of CaCO3 EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 5 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear A.11. Description of Treabnent a. What level of treatment are provided? Check all that apply. ❑ Primary ❑ Secondary E Advanced E Other. Describe: Tertiary. Enhanced bioloclical nutrient removal b. Indicate the following removal rates (as applicable): Design BOD5 removal or Design CBOD5 removal 97.5 % Design SS removal 97.2 % Design P removal 94.4 % Design N removal 93.1 % Other Design Ammonia 96 % C. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe: Ultraviolet Disinfection (UV) If disinfection is by chlorination is dechlonnation used for this outfall? ❑ Yes ❑ No Does the treatment plant have post aeration? E Yes ❑ No A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is discharged. Do not Include Information on combined sewer overflows in this section. All Information reported must be based on data collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QAIQC requirements of 40 CFR Part 136 and other appropriate QAIQC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a minimum, effluent testing data must be based on at least three samples and must be no more than four and one-half years apart. Outfall number: 001 MAXIMUM DAILY VALUE AVERAGE DAILY VALUE PARAMETER Value Units Value Units Number of Samples pH (Minimum) 6.7 S.U. pH (Maximum) 7.8 SM. Flow Rate 14.08 mgd 6.3 m d 1096 299 Temperature (Winter) 22.5 °C 16.3 °C Temperature (Summer) 28.7 °C 23.4 °C 450 ' For pH please report a minimum and a maximum daily value MAXIMUM DAILY AVERAGE DAILY DISCHARGE POLLUTANT DISCHARGE ANALYTICAL MLIMDL Conc. Units Conc. Units Number of METHODSamples CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS BIOCHEMICAL OXYGEN BOD5 7.8 mg/1 <2.0 m /I 408 SM 5210B 2.0 DEMAND (Report one) CBOD5 FECAL COLIFORM 95 #1100 ml 4 #/100 ml 409 SM 9222D 1 C01/100 ml TOTAL SUSPENDED SOLIDS (TSS) 4.7 m /I <2.5 m /l 408 SM 2540D 2.5 END OF PART A. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 6 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear BASIC APPLICATION INFORMATION PART B. ADDITIONAL APPLICATION INFORMATION FOR APPLICANTS WITH A DESIGN FLOW GREATER THAN OR EQUAL TO 0.1 MGD (100,000 gallons per day). All applicants with a design flow rate 2 0.1 mgd must answer questions B.1 through B.6. All others go to Part C (Certification). B.I. Inflow and Infiltration. Estimate the average number of gallons per day that flow into the treatment works from inflow and/or infiltration. 300,000 gpd Briefly explain any steps underway or planned to minimize inflow and infiltration. We complete auartedy oriorify line inspections to identify areas to repair. Manhole and collection system inspection program and coatina/replacement as necessary. B.T. Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries. This map must show the outline of the facility and the following information. (You may submit more than one map if one map does not show the entire area.) a. The area surrounding the treatment plant, including all unit processes. b. The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which treated wastewater is discharged from the treatment plant. Include outfalls from bypass piping, if applicable. c. Each well where wastewater from the treatment plant is injected underground. d. Wells, springs, other surface water bodies, and drinking water wells that are: 1) within % mile of the property boundaries of the treatment works, and 2) listed in public record or otherwise known to the applicant. e. Any areas where the sewage sludge produced by the treatment works is stored, treated, or disposed. f. If the treatment works receives waste that is classified as hazardous under the Resource Conservation and Recovery Act (RCRA) by truck. rail, or special pipe, show on the map where the hazardous waste enters the treatment works and where it is treated, stored, and/or disposed. B.3. Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant, including all bypass piping and all backup power sources or redunancy in the system. Also provide a water balance showing all treatment units, including disinfection (e.g., chlorination and dechlorination). The water balance must show daily average flow rates at influent and discharge points and approximate daily flow rates between treatment units. Include a brief narrative description of the diagram. BA. Operation/Maintenance Performed by Contractor(s). Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works the responsibility of a contractor? ❑ Yes ® No If yes, list the name, address, telephone number, and status of each contractor and describe the contractors responsibilities (attach additional pages 0 necessary). Name: Mailing Address: Telephone Number: f I Responsibilities of Contractor: B.S. Scheduled Improvements and Schedules of Implementation. Provide information on any uncompleted implementation schedule or uncompleted plans for improvements that will affect the wastewater treatment, effluent quality, or design capacity of the treatment works. If the treatment works has several different implementation schedules or is planning several improvements, submit separate responses to question B.5 for each. (If crone, go to question B.6.) a. List the outfall number (assigned in question A.9) for each ouffall that is covered by this implementation schedule. None b. Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies. ❑ Yes ❑ No EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 7 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear c. If the answer to B.5.b is "Yes; briefly describe, including new maximum daily inflow rate (if applicable). d. Provide dates imposed by any compliance schedule or any actual dates of completion for the implementation steps listed below, as applicable. For improvements planned independently of local, State, or Federal agencies, indicate planned or actual completion dates, as applicable. Indicate dales as accurately as possible. Schedule Actual Completion Implementation Stage MM1DD/YYYY MM/DD/YYYY - Begin Construction - End Construction / / - Begin Discharge / - Attain Operational Level e. Have appropriate pennits/cleamnces concerning other Federal/State requirements been obtained? ❑ Yes ❑ No Describe briefly, B.6. EFFLUENT TESTING DATA (GREATER THAN 0.1 MGD ONLY). Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is discharged. Do not Include information on combine sewer overflows in this section. All information reported must be based on data collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with CA/QC requirements of 40 CFR Part 136 and other appropriate QA1QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a minimum effluent testing data must be based on at least three pollutant scans and must be no more than four and on -half years old. Outfall Number: 00'. MAXIMUM DAILY AVERAGE DAILY DISCHARGE DISCHARGE ANALYTICAL POLLUTANT-- --- -- METHOD MLANDL Conc. Units Conc. Units Numberof Samples CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS AMMONIA (as N) 4.2 mgfl 0.1 mg/I 417 SM 4500NH3 D 0.10 CHLORINE (TOTAL 10 ugll 9 ug/I 3 SM 4500CI G 2.0 RESIDUAL, TRC) DISSOLVED OXYGEN 10.9 mgA 8.8 mgA 749 Hach 10360 0.05 TOTAL KJELDAHL 2.5 mgA 0.88 mall 158 EPA 351.1 0.20 NITROGEN (TKN) NITRATE PLUS NITRITE 8.74 mgll 2.86 mgll 158 EPA 353.2 0.10 NITROGEN OIL and GREASE <5 mgA <5 mgA 3 EPA 1664A 5.0 PHOSPHORUS (Total) 2.89 mgA 0.248 mgA 157 EPA 200.8 0.02 TOTAL DISSOLVED SOLIDS 428 mgA 378 mgA 3 SM 2540C 10.0 (TDS) OTHER Chloride 94.8 m9A 73.5 mgA 12 SM 4500CI C 0.10 Fluoride 1.2 mg/I 0.7 mg/I 157 SM 450OF q 0.10 END OF PART B. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE EPA Fogy 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 8 7550-22. F, i„ +, c1 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear BASIC APPLICATION INFORMATION PART C. CERTIFICATION All applicants must complete the Certification Section. Refer to Instructions to determine who is an officer for the purposes of this certification. All applicants must complete all applicable sections of Form 2A, as explained in the Application Overview. Indicate below which parts of Form 2A you have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed Form 2A and have completed all sections that apply to the facility for which this application is submitted. Indicate which parts of Form 2A you have completed and are submitting: ® Basic Application Information packet Supplemental Application Information packet: ® Part D (Expanded Effluent Testing Data) ® Part E (Toxicity Testing: Biomonkoring Data) ® Part F (Industrial User Discharges and RCRA/CERCLA Wastes) ❑ Part G (Combined Sewer Systems) ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION. 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 submit". Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the inforrhation is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name and official title WAke D is untv Manager Signature Telephone number (9191 0-0000 Date signed 3 (S J Upon request of the permitting authority, you must submit any other information necessary to assure wastewater treatment practices at the treatment works or identify appropriate permitting requirements. SEND COMPLETED FORMS TO: NCDENR/ DWO Attn: NPDES Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 EPA Form 3510-2A (Rev. 1-99). Replaces EPA fortes 7550-6 8 7550-22. Page 9 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear SUPPLEMENTAL APPLICATION INFORMATION PART D. EXPANDED EFFLUENT TESTING DATA Refer to the directions on the cover page to determine whether this section applies to the treatment works. Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design Flow greater than or equal to 1.0 mgd or it has (or is required to have) a pretreatment program, or is otherwise required by the permitting authority to provide the data, then provide effluent testing data for the following pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each outfall through which effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data collected through analyses conducted using 40 CFR Part 136 methods. In addition, these data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the blank rows provided below any data you may have on pollutants not specifically listed in this form. Al a minimum, effluent testing data must be based on at least three pollutant scans and must be no more than four and one -haft years old. Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.) MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE POLLUTANT ANALYTICAL MUMDL Un Number Conc. Units Mass Units Conc. Units Mass of METHOD Its Samples METALS (TOTAL RECOVERABLE), CYANIDE, PHENOLS, AND HARDNESS. ANTIMONY <0.025 mg/I <1.36 lbs. <0.025 mgll <1.15 lbs 3 EPA 200.7 0.025 ARSENIC <0.010 mg/I <1.17 lbs. <0.010 mg/I <0.53 lbs 7 EPA 200.7 0.010 BERYLLIUM <0.005 mg/I <0.27 lbs. <0.005 mgA <0.23 Ibs 3 EPA 200.7 0.005 CADMIUM <0.002 mg/l <0.23 lbs. <0.002 mgA <0,11 Ibs 7 EPA 200.7 0.002 CHROMIUM <0.005 mgA <0.59 lbs. <0.005 mgA <0.26 Ibs 7 EPA 200.7 0.005 COPPER 0.005 mgA 0.59 tbs. <0.002 mgA 0.26 Ibs 13 EPA 200.7 0.002 LEAD <0.010 mg/I <1.17 lbs. <0.010 mgA <0.53 Ibs 7 EPA 200.7 0.010 MERCURY 4.8 ngA 0.0006 lbs. <t ngA <0.00005 lbs 12 EPA 200.8 1.0 NICKEL <0.010 mgA <1.17 lbs. <0.010 mg/I <0.53 Ibs 7 EPA 2D0.7 0.010 SELENIUM <0.010 mgA <1.17 tbs. <0.010 mg/I <0.53 Ibs 7 EPA 200.7 0.010 SILVER <0.005 mgn <0.59 lbs. <0.005 mg/l <026 Ibs 7 EPA 200.7 0.005 THALLIUM <0.020 mg/1 0.09 tbs. <0.020 mg/I <0,92 Ibs 3 EPA 200.7 0.020 ZINC 0.127 Mgt) 14.9 lbs. 0.093 m9/1 4.89 lbs 12 EPA 200.7 0,010 CYANIDE <0.005 Mgt) <0.59 lbs. <0.005 mgA <0.26 Ibs 7 EPA 335.4 0.005 TOTAL PHENOLIC 0.036 mgA 1.96 lbs. 0.015 mgA 0.69 Ibs 3 EPA 420.1 0.010 COMPOUNDS HARDNESS (as CaCO3) 98 mgA 11508 Ibs- 77 mg/l 4046 Its 152 SM 2340C 1.0 Use this space (or a separate sheet) to provide information on other metals requested by the permit writer Molybdenum 0.098 milli 11.5 lbs. 0.032 mg/I 1.68 lbs 6 EPA 200.7 0.006 EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 8 7550-22. Page 10 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO02605 Renewal Cape Fear Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.) MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE POLLUTANT ANALYTICAL MLIMDL Number Cone. Units Mass Units Con;.FUnits7Mass Units of METHOD Samples VOLATILE ORGANIC COMPOUNDS ACROLEIN <50 ugA <2.72 lbs. <50 ug/I <2.30 lbs. 3 EPA624 50.0 ACRYLONRRILE <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA624 10.0 BENZENE <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA 624 1.0 BROMOFORM <t ugA <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA624 1.0 CARBON <1 ugA <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA 624 1.0 TETRACHLORIDE CHLOROBENZENE <1 ugA <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA 624 1.0 CHLORODIBROMO- <i ugA <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA 624 1.0 METHANE CHLOROETHANE <5 ugA <0.27 lbs. <5 ugA <0.23 lbs. 3 EPA624 5.0 2CHLOROETHYLVINYL <5 ugA <0.27 lbs. <5 ugA <0.23 lbs. 3 EPA624 5.0 ETHER CHLOROFORM <1 ug/I <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA 624 1.0 DICHLOROBROMO- <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA 624 1.0 METHANE 1,1-DICHLOROETHANE <1 ugA <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 1,2-DICHLOROETHANE <1 ugA <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 TRANS-I,2-DICHLORO- <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 ETHYLENE 1,1-DICHLORO- <1 ug/I <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA 624 1.0 ETHYLENE 1,2-DICHLOROPROPANE <1 ug/I <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA624 1.0 1,3-DICHLORO- <1 ugA <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA 624 1.0 PROPYLENE ETHYLBENZENE <1 ugA <0.05 lbs. <1 <0.05 lbs. 3 EPA624 1.0 METHYL BROMIDE <5 ugA <0.27 lbs. <5 FugA <0.23 lbs. 3 EPA 624 5.0 METHYL CHLORIDE <5 ug/I <0.27 lbs. <5<0.23 lbs. 3 EPA 624 5.0 METHYLENE CHLORIDE <1 ug/I <0.05 lbs. <t <0.05 lbs. 3 EPA624 1.0 1,1,2,2-TETRA- <1 ugA <0.05 lbs. <1 u9/1 <0.05 lbs. 3 EPA624 1.0 CHLOROETHANE TETRACHLORO- <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 ETHYLENE TOLUENE <I ug/I <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA 624 1.0 EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22, Page 11 of 22 FACILITY NAME AND PERMIT NUMBER: I Triangle Wastewater Treatment Plant, NCO026051 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Cape Fear Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.) POLLUTANT MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE ANALYTICAL METHOD MLAMDL Conc. Units Mass Units Conc. Units Mass Units Number of Samples 1,1.1 TRICHLOROETHANE <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 1.1.2 TRICHLOROETHANE <1 ug/I <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 TRICHLOROETHYLENE <1 ug/I <0.05 lbs. <1 ugA <0.05 lbs. 3 EPA624 1.0 VINYL CHLORIDE <5 ug/I <0.27 lbs. <5 u9/1 <0.23 lbs. 3 EPA624 5.0 Use this space (or a separate sheet) to provide Information on other volatile organic compounds requested by the permit writer 1,4-Dichlorobemene <t ug/I <0.05 lbs. <1 ug/1 <0.05 lbs. 3 EPA624 1.0 1, 2- Dichlorobenzene <t ug/I <0.05 lbs. <1 ug/1 <0.05 lbs. 3 EPA 624 1.0 1, 3-Dichlorobenwne <I ug/I <0.05 lbs. <1 ug/1 <0.05 lbs. 3 EPA624 1.0 1, 2-Dibromoethane <1 ugA <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA 624 1.0 Trichloro0uoromethane <5 ugn <0.27 lbs. <5 ug/I <0.23 lbs. 3 EPA624 5.0 0s-1,3- dichloropropylerle <1 ug/1 <0.05 lbs. <1 ug/I <0.05 lbs. 3 EPA624 1.0 ACID -EXTRACTABLE COMPOUNDS P-CHLORO-M-CRESOL <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 2-CHLOROPHENOL <10 ug/1 <0.54 lbs. <10 ug/I <0A6 lbs. 3 EPA 625 10 2,4-DICHLOROPHENOL <10 ug/1 <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 2,4-DIMETHYLPHENOL <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA625 10 4,6-DINITRO-O-CRESOL <50 ugA <2.72 lbs. 150 u9/1 <2.30 lbs. 3 EPA 625 50 2,4-DINITROPHENOL <50 u9/1 <2.72 lbs. <50 ug/1 <2.30 lbs. 3 EPA625 50 2-NITROPHENOL <10 ug/I <0.54 lbs. <10 ugh <0.46 lbs. 3 EPA 625 10 4-NrTROPHENOL <50 ug/I <2.72 lbs. <50 ug/1 <2.30 lbs. 3 EPA625 50 PENTACHLOROPHENOL <50 ug/I <2.72 lbs. <50 ug/1 <2.30 lbs. 3 EPA625 50 PHENOL <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 2,4,6 TRICHLOROPHENOL <10 ug/1 <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 Use this space (or a separate sheet) to provide information on other acid -extractable compounds requested by the permit writer BASE -NEUTRAL COMPOUNDS ACENAPHTHENE <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 ACENAPHTHYLENE <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 12 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear Outfall number. 001 (Complete once for each outfall discharging effluent to waters of the United States.) MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE POLLUTANT ANALYTICAL ML/MDL Number Cone. Units Mass Units Conc. Units Mass Units of METHOD Samples ANTHRACENE <10 ug/I <0.54 lbs. 00 ugh <0.46 lbs. 3 EPA 625 10 BENZIDINE <50 ugA <2.72 lbs. <50 ug/I <2.30 lbs. 3 EPA 625 50 SENZO(A)ANTHRACENE <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 BENZO(A)PYRENE <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 3,4 BENZO- <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 FLUORANTHENE BENZO(GHI)PERYLENE <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 BENZO(K) <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 FLUORANTHENE BIS (2-CHLOROETHOXY) <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 METHANE BIS (2CHLORGETHYL} <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 ETHER BIS (2-CHLOROISO- <10 ugA <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 PROPYL)ETHER BIS (2- THYLHEXYL) 289 ugA 15.7 lbs. 99.7 ug/I 4.58 lbs. 3 EPA 625 10 PHTHALATE 443ROMOPHENYL <10 ug/I <0.54 tbs. <10 ugA <0.46 lbs. 3 EPA 625 10 PHENYL ETHER BUTYL BENZYL <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 PHTHALATE 2CHLORO- <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 NAPHTHALENE 4CHLORPHENYL <10 ug/I <0.54 lbs. <10 ugA <0.46 tbs. 3 EPA 625 10 PHENYLETHER CHRYSENE <10 ug/I <0.54 lbs. <10 ugll <0.46 lbs. 3 EPA 625 10 DI44-BUTYL PHTHALATE <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 DI-N-OCTYL PHTHALATE <10 ugA <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 DIBENZO(A,H) <10 UgA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 ANTHRACENE 1,2-DICHLOR013EN7ENE <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 1,3-DICHLOROBENZENE 00 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 1,4-DICHLOROBENZENE <1D ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 3,3-DICHLORO- <50 ug/l <2.72 lbs. <50 ugA <2.30 lbs. 3 EPA 625 50 BENZIDINE DIETHYL PHTHALATE <10 ug/I <0.54 lbs. <10 ug/1 <0.46 lbs. 3 EPA 625 10 DIMETHYL PHTHALATE <10 ugA <0.54 lbs. <10 ugA <0.46 lbs. 3 EPA 625 10 EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Pape 13 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear Outfall number. 001 (Complete once for each outfall discharging effluent to waters of the United States.) MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE POLLUTANT ANALYTICAL- MLIMDL Number Conc. Units Mass Units Cone. Units Mass Units of METHOD Samples 2A-DINITROTOLUENE 00 ugh <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 2,6-DINITROTOLUENE 00 ugh <0.54 lbs. <10 ugh <0.46 lbs. 3 EPA625 10 1,2-DIPHENYL- HYDRAZINE <10 ug/I <0.54 lbs. <10 ug/I <0.46 Ibs. 3 EPA625 10 FLUORANTHENE 00 ugh <0.54 lbs. <10 ug/I <0.46 Ibs. 3 EPA625 10 FLUORENE <10 ugh <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 HEXACHLOROBENZENE <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 HEXA- <10 ugh <0.54 lbs. <10 ug/I <0.46 lbs, 3 EPA625 10 BUTADIENE DIENE HEXACHLOROCYCLO- <50 ug/I <2.72 lbs. <50 ugh <2.30 lbs. 3 EPA 625 50 PENTADIENE HEXACHLOROETHANE <10 ug/I <0.54 lbs. <10 ug/1 <0.46 lbs, 3 EPA 625 10 INDENO(1,2,3-CD) <10 ug/I <0.54 lips. <10 ugh <0.46 lbs. 3 EPA625 10 PYRENE ISOPHORONE <10 ugA <0.54 lbs' <10 ugA <0.46 lbs. 3 EPA625 10 NAPHTHALENE 00 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 NITROBENZENE <10 ug/I <0.54 lbs. <10 ugA <0.46 lbs, 3 EPA625 10 N-NITROSODI-N- PROPVLAMINE <10 ug/I <0.54 lbs. <10 ugn <0.46 lbs. 3 EPA 625 10 OSODI- <10 ug/I <0.54 Ibs. <70 ug/I <0.46 lbs. 3 EPA 625 10 METH METHYLAMINE N-NITROSODI- <10 ug/I <0-54 lbs - <10 ug/I <0.46 lbs. 3 EPA625 10 PHENYLAMINE PHENANTHRENE <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 PYRENE <10 ugA <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA 625 10 1,2,4- TRICHLOROBENZENE <10 ug/I <0.54 lbs. <10 ug/I <0.46 lbs. 3 EPA625 10 2.4-Dinitrophenol <50 ug/I <2.72 lbs. <50 ug/I <2.30 lbs. 3 EPA 625 50 2-Methylnaphthalene <10 ug/I <0.54 lbs. <10 ug/I <0.46 Ibs. 3 EPA625 10 Use this space (or a separate sheet) to Provide information on other base -neutral compounds requested by the permit writer Use this space (or a separate sheet) to provide information on other pollutants (e.g., pesticides) requested by the permit writer END OF PART D. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550.6 & 7550-22. FACILITY NAME AND PERMIT NUMBER: ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NC0026051 [PERMIT Renewal Cape Fear SUPPLEMENTAL APPLICATION INFORMATION PART E. TOXICITY TESTING DATA POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of the facility's discharge points: 1) POTWs with a design Flaw rate greater than or equal to 1.0 mgd; 2) POTWs with a pretreatment program (or those that are required to have one under 40 CFR Part 403); or 3) POTWs required by the permitting authority to submit data for these parameters. • At a minimum, these results must include quarterly testing for a 12-month period within the past 1 year using multiple species (minimum of two species), or the results from four tests performed at least annually in the four and one-half years prior to the application, provided the results show no appreciable toxicity, and testing for acute and/or chronic toxicity, depending on the range of receiving water dilution. Do not include information on combined sewer overflows in this section. All information reported must be based on data collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analyzes not addressed by 40 CFR Part 136. • In addition, submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity test conducted during the past four and one-half years revealed toxicity, provide any information on the cause of the toxicity or any results of a toxicity reduction evaluation, if one was conducted. • If you have already submitted any of the information requested in Part E, you need not submit it again. Rather, provide the information requested in question EA for previously submitted information. If EPA methods were not used, report the reasons for using alternate methods. If test summaries are available that contain all of the information requested below, they may be submitted in place of Part E. If no blomonitoring data is required, do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to complete. E.I. Required Tests. (Each toxicity test performed by Durham County has been submitted as required. A summary of the tests is attached. Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years. ® chronic ❑ acute E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one column per test (where each species constitutes a test). Copy this page it more than three tests are being reported. Test number. Test number: Test number: a. Test information. Test Species & test method number Age at initiation of test Outfall number Dates sample collected Date test started Duration b. Give toxicity test methods followed. Manual title Edition number and year of publication Page number(s) c. Give the sample collection method(s) used. For multiple grab samples, indicate the number of grab samples used. 24-Hour composite Grab d. Indicate where the sample was taken in relation to disinfection. (Check all that apply for each. Before disinfection After disinfection After dechlorinalion EPA Form 3510-2A (Rev. 1-99). Replaces EPA fortes 7550-6 & 7550-22. Page 15 of 22 FACILITY NAME AND PERMIT NUMBER: Triangle Wastewater Treatment Plant, NCO026051 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Cape Fear Test number: Test number. Test number: e. Describe the point in the treatment process at which the sample was collected. Sample was collected: I. For each test, include whether the test was intended to assess chronic toxicity, acute toxicity, or both Chronic toxicity Acute toxicity g. Provide the type of test performed. Static Static -renewal Flow -through h. Source of dilution water. If laboratory water, specify type; 9 receiving water, specify source. Laboratory water Receiving water I. Type of dilution water. If salt water, specify "natural" or type of artificial sea salts or brine used. Fresh water Salt water j. Give the percentage effluent used for all concentrations in the test series. k. Parameters measured during the test. (State whether parameter meets test method specifications) pH Salinity Temperature Ammonia Dissolved oxygen I. Test Results. Acute: Percent survival in 100% effluent % % % LCm 95% C.I. % % % Control percent survival % % % Other (describe) EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 16 of 22 FACILITY NAME AND PERMIT NUMBER: Triangle Wastewater Treatment Plant, NCO026051 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Cape Fear Chronic: NOEC % % % ICzs % % % Control percent survival % % % Other (describe) m. Quality Control/Qual ty Assurance. Is reference toxicant data available? Was reference toxicant test within acceptable bounds? What date was reference toxicant test run (MM/DD/YYYY)? Other (describe) E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation? ❑ Yes ❑ No If yes, describe: EA. Summary of Submitted Biommitoring Test Information. If you have submitted biomonitoring test information, or information regarding the cause of toxicity, within the past four and one-half years, provide the dates the information was submitted to the permitting authority and a summary of the results. Dale submitted: / / (MM/DD/YYYY) Summary of results: (see instructions) END OF PART E. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE. EPA Form 3510-2A (Rev. 1.99). Replaces EPA forms 7550-6 & 7550-22. FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear SUPPLEMENTAL APPLICATION INFORMATION PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES All treatment works receiving discharges from significant Industrial users or which receive RCRA,CERCLA, or other remedial wastes must complete part F. GENERAL INFORMATION: F.I. Pretreatment program. Does the treatment works have, or is subject to, an approved pretreatment program? ® Yes ❑ No F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of industrial users that discharge to the treatment works. a. Number of non -categorical SIUs. 1 b. Number of CIUs. 10 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. N more than one SIU discharges to the treatment works, copy questions F.3 through F.S and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. (All of the Significant Industrial User Information is attached. Total of 11 pages.) Name: Mailing Address: FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. F.5. Principal Product(s) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal pmduct(s). Raw material(s): F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd ( continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. - gpd ( continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ❑ Yes ❑ No b. Categorical pretreatment standards ❑ Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 t1 7550-22, Page 18 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear F.S. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ❑ No If yes, describe each episode. RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE: F.9. RCRA Waste. Does the treatment works receive or has It in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe? ❑ Yes ® No (go to F.12) F.10. Waste transport. Method by which I waste is received (check all that apply): ❑ Truck ❑ Rail ❑ Dedicated Pipe F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units). EPA Hazardous Waste Number Amount Units CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER: F.12. Remedlation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities? ❑ Yes (complete F.13 through F.15.) ® No F.13. Waste Origin. Describe the sde and type of facility at which the CERCLAIRCRA/or other remedial waste originates (or is excepted to origniate in the next five years). F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if known. (Attach additional sheets if necessary.) F.15. Waste Treatment a. Is this waste treated (or will be treated) poor to entering the treatment works? ❑ Yes ❑ No If yes, describe the treatment (provide information about the removal efficiency). I Is the discharge (or will the discharge be) continuous or intermittent? ❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule. END OF PART F. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. P"- 1" " . , FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear SUPPLEMENTAL APPLICATION INFORMATION PART G. COMBINED SEWER SYSTEMS If the treatment works has a combined sewer system, complete Part G. G.I. System Map. Provide a map indicating the following: (may be included with Basic Application Information) a. All CSO discharge points. b. Sensitive use areas potentially affected by CSOs (e.g., beaches, drinking water supplies, shellfish beds, sensitive aquatic ecosystems, and outstanding natural resource waters). C. Waters that support threatened and endangered species potentially affected by CSOs. G.2. System Diagram. Provide a diagram, either in the map provided in G.1 or on a separate drawing, of the combined sewer collection system that includes the following information. a. Location of major sewer trunk lines, both combined and separate sanitary. b. Locations of points where separate sanitary sewers feed into the combined sewer system. C. Locations of in -line and off-line storage structures. d. Locations of flow -regulating devices. e. Locations of pump stations. CSO OUTFALLS: Complete questions G.3 through G.6 once for each CSO discharge point. G.3. Description of Outall. a. Ouffall number b. Location (City or town, if applicable) (Zip Code) (County) (State) (Latitude) (Longitude) C. Distance from shore (it applicable) R d. Depth below surface (it applicable) R. e. Which of the following were monitored during the last year for this CSO? ❑ Rainfall ❑ CSO pollutant concentrations ❑ CSO frequency ❑ CSO Row volume ❑ Receiving water quality I. How many storm events were monitored during the last year? GA. CSO Events. a. Give the number of CSO events in the last year. events (❑ actual or ❑ approx.) b. Give the average duration per CSO event. hours (❑ actual or ❑ approx.) EPA Form 3510-2A (Rev. 1-99). Replaces EPA fortes 7550-6 & 7550-22. Page 20 of 22 FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN: Triangle Wastewater Treatment Plant, NCO026051 Renewal Cape Fear C. Give the average volume per CSO event. million gallons (❑ actual or ❑ approx.) d. Give the minimum rainfall that caused a CSO event in the last year Inches of rainfall G.S. Description of Receiving Waters. a. Name of receiving water: b. Name of watershed/river/stream system: United State Soil Conservation Service 14digit watershed code (d known): C. Name of State Management/River Basin: United States Geological Survey 8-digit hydrologic cataloging unit code (if known): G.6. CSO Operations. Describe any known water quality impacts on the receiving water caused by this CSO (e.g., permanent or intermittent beach closings, permanent or intermittent shell fish bed closings, fish kills, fish advisories, other recreational loss, or violation of any applicable Slate water quality standard). END OF PART G. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE. EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 21 of 22 low 17 •' I ==ITT- i ;� lop •' �F 1522 WELLS: • MW - MONITORING ' ' - . + _,. fi: .. w +- - 'i� i�t' -•+ 't*iit<.. -„ • 5926 - POTABLE -- i " ``" _ _ EFFLUENT LINE ..y * - �•: r,'� - SOURCE UNUSED POTABLE SOURCE • 1522 SEDWICK +• • 1526 SEDWICK.t * %^�• ti ' HO ` i t11� -. _ t�- 1• p. ..� -r1 .r t DURHAM COUNTY PO /�G CHATHAM COUNTY LINE DURHAM COUNTY JQ-f. .I� WAKE COUNTY LINE E SCALE: 1"=1000' ARP TRIANGLE WASTEWATER TREATMENT SCALE APPROVED BY: 1=1000 :� ...2= PLANT - AREA MAP �N CA WEC 0 500 1000 2000 4000 DRAWN BY: DURHAM COUNTY, NORTH CAROLINA 2015 TWWTP $ ENGINEERING DEPARTMENT AREA MAP DATE: 8/31/2015 Backwash water from the sandfilters is directed to a flow equalization tank. During periods of high flow or upset, the equalization tank can discharge water to the treatment plant lagoon. The lagoon could also be used for emergency storage of industrial slug loads. Biosolids Handling Facility The Biosolids Handling Facility consists of sludge holding tanks, a dewatering building, a truck loading station which are located mainly within the footprint of the former southern aeration basin. The structures are arranged to facilitate the future addition of equipment and additional liquid waste activated sludge (WAS) storage. The sludge holding tanks are located adjacent to the dewatering building which is a one story structure with a basement. The basement houses sludge grinders, and sludge feed pumps. The main process level houses a control room, test/sample preparation room, electrical room, centrifuge area, polymer feed and storage area, and the pipe gallery containing the cakes pump and piping area. Decant and centrate are directed to the same equalization tank that receives sand filter backwash. If the biosolid dewatering system is offline, sludge may be wasted to the sludge lagoon. The lagoon provides more than thirty days of storage for waste activated sludge. Use of the lagoon can result in nutrient release, and therefore, its use is limited. Reuse Water System The Durham Triangle WWTP operates and maintains a 5.2 MGD reuse water system (Permit # WQ0032821). Within the Triangle W WTP reuse water is used for a variety of purposes including toilet flushing, the HVAC system in the administration building, power washing and yard hydrants. The reuse water system consists of the following components: four turbine pumps, a hydro - pneumatic tank, a 500,000 gallon storage tank, instrumentation and metering, a dual disinfection system and a distribution system. The distribution system includes continuous monitoring of chlorine, pressure and flow. Backup Power Sources The Durham Triangle WWTP operates and maintains 4 generators as a back-up power source for use when utility power is not available. There is an 800kW generator and automatic switch gear at the plant headworks, two 1000kW generators and automatic switch gear at the Effluent MCC Building, and a 1000kW generator and automatic switch gear at the Biosolids MCC Building. Process Flow Narrative Description Wastewater Treatment The Durham County Triangle WWTP (NPDES Permit # NC0026051) is a 12 MGD Advanced Tertiary Treatment plant with enhanced Biological Nutrient Removal that discharges to Northeast Creek. In order to produce the high -quality final product, the raw influent is subjected to a sequence of individual unit processes ranging from fine screening to disinfection. Each unit process has its own side streams and discharge by-products that must be processed or disposed of. The treatment scheme applied at the Triangle W WTP includes continuous fine screens discharging to the influent pump station, which is equipped with six submersible pumps. The pumps lift the screened influent to the upper treatment level where the grit removal system and flow measurement/sampling units are located. After the two physical processes of screening and grit removal, the influent is directed to the biological treatment process. Each Modified A210 treatment train includes a three (3) cell anaerobic selector for phosphorous release, a two (2) cell primary anoxic zone for nitrogen removal, an oxidation ditch for aerobic BOD removal and nitrification of ammonia, a two (2) cell secondary anoxic zone for additional denitrification, and a reaeration zone prior to the four (4) 110-ft diameter secondary clarifiers. The Return Activated Sludge (RAS) is directed to the first cell of the anaerobic selector to provide the RAS with additional denitrification time in an effort to create suboxic conditions prior to the introduction of the raw influent containing readily degradable soluble BOD. The screened and de - gritted influent is directed to the second cell of the anaerobic selector, where it is commingled with Return Activated Sludge (RAS). The forward flow continues on through the third cell of the anaerobic selector and proceeds to the first cell of the primary anoxic zone. Nitrified mixed liquor recycled from the oxidation ditch is discharged to the first cell of the primary anoxic zone, as well. The primary anoxic zone provides the anoxic ambient conditions and carbon source required to denitrify the nitrates recycled from the oxidation ditch. The discharge from the oxidation ditches is directed to the secondary anoxic zone for further denitrification. Methanol can be added to this unit to provide the carbon food source for denitrifying bacteria. The denitrified wastewater is re -aerated prior to discharging to the clarifiers and sodium aluminate is added at the clarifier splitter box to provide additional phosphorus removal. In the clarifier the biomass is separated from the clarified effluent and is returned to the head of the process, as described above. The clarified effluent that discharges over the weirs is directed to the tertiary filters. The travelling bridge sand filters physically remove the fines from the treated water. The filtered effluent is then disinfected through the ultraviolent disinfection unit and directed to the post aeration basin prior to stream discharge or reuse. 310 300 290 280 -- 270 260 250 240 230 220 INFW ENTAND EFFI WFlLEMIN➢YG6 WITA ROW. ALQG(S OULY 1.5 MGO 12A YW ROW. RFAIf DALr 00 A. SAO NO ROW. FEN{ XM)Lr p0 .0 $. MOO SODS. MASS x)NAMNI SS 155. CwCFHMATON M, MASS 9.]LS IN II IGO mp ]5, IM� IRO mp IIM. CONOENTRAPw 4.7551N� Ia030 R•� 40 MN. YAn 1.500 a/! AO,O a/0 OONSM,7RAnw 25 1.% xx.Yx. 3% 2325 b/I m. CwCENRAnw maq//A; 5 /I 7. MASS 150 a/G 5004IG7JC MFOEH O6 WRAIMK FFPAAAm RUEMi ]AR.W N agow ROx. AL4AAG! DNLY 120 MOO .5. Cd TRAnp[ BOOS. MASS 5 me 5 mgA1 M. 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Eo y ROW YEIER EpW ICoo FW .�� F W R 6 GL,w.far (bcM`JI"x EOMFum STS'TION PLANT SCHEMATIC N07 i0 KC I [.] AIM RODY puv WM PHASE III LIQUID PROCESS FACILITIES HYDRAULIC PROFILE NCRTICAL $CM.E; N NOR120NTAL $CALL: NONE ®0—ASyUV .".AITIE f.. 0 IVM ALVMI.A ®O SCOIIIM ALUMINAM FEED eD 7•L' � eOLMIER TEED ®O RAS METER sARMARY 11 1 M,A I.W.S I I I I ®OSODUY xHOG1LORR FEm CW gAy w ITS EM$)YG 5 I I I I I I • 1 Iv mMFA dB�NFE nw 55)Eu AxAL I I I I fsfWFxl / CDL RAS AiC E! IAi •_4 dSCXAROf (��'j I 1 '.11 fFPOST I II CLNAYn b.YEFIER RIi /2 ROWM'E RR AERAnw $I x 3 2 A Afdf1 CLn I I I I I 11111 `` SCU JJ I I I I OFDLVMp 7EID 1 1 1 1 5� uaWlw r III 1I SLUDc X0.bNG 2 L �� 90DOE T LGWIO l£GExO FALaRT OW NCOxI M ONW. SWYERCED AERATOR Ip� WS NOT "ORIN FOR 0. V ( VM`Isn ® BLOWER 2, f AT S SYOM IN NAY M (�11GW A b.RJ') EIRSTINIC IIliN ® ROAPNO CECAxIER Sly !;IVIVL 1`iA © WADER 1 ILK J T..K Aw'sSc 11 �Iw ORµ Y ® E R p p"p E( SMBMEROSO Mace W 300 270 n N7 u I _ 250 J240 II I I om WeMnMa AT D{L m L�gelp NaYI W M�ps aaL 220 u R. NC00ea%051 TRIANGLE WASTEWATER TREATMENT PLANT PHASE III PLANT SCHEMATIC AND ;:. R9YN® «L6DO R D MOR M•W ARMDmw w RYI w YONAIM +m c�o1 C-1 HYDRAULIC PROFILE 54Np Q Me 310 300 290 270 26D 0.� 250 I Evslwo I I I t� OIP I I E 242 I I 240 I 1 1 IxM_ FL I 1 I 230 C p.Op OQ R t20.5 �v0 I I I I I I 210.5 orar � LssOiR 1'i^ r___ �- �OOFi rr Eq. L.J 11 1 1 I I T t( LE: 300 280 260 240 HYDRAULIC PROFILE 220 �fA1111CK A'.IE t' � tY IYJFTlOIfK SGIL HLt< VGpi rt 1 4: VFMC I '%C ' "D �OO+,s TRANCE WASIEWATM TfEATMNT PLANE am ON" %A rr IM7 DUR'IAM COMITY PHASE 1 II H CAFiOLNA PLANT SCFBI"MC MD "" mo HYDRAULIC PROFi P M2 usm m SLNE r CIRp � rw.. A.A WM K 11ppp11IL � M 4W6 p na R A a Mir!UK 1IMI11141IIIAWAIIIII.M.LINIIIII/.RR so G WOROvxEUWTIC Twx UP a.�..0 g... II If— T W iAC11111 05,R�9NICN UR M uETEPoRc � L IXISTNG 36' O, M 401 JB' Oi y.11.n Rrro to RCCV PUNv A M' BiV STATOR umo REc b 2 cLURwEu PLAN +fug o00 �dll.n 2W — 2SX WL m — 25 RNL 2W 2M NWL m 20 CIF/A1YN1 m-2w W T%CA.IIY E%RTWG REC1/JNED WFLL vuw STeTIOR PROFILE vJ & C 0;'Z92_ ome%m n R. 1lVM Alr� {/M�� * " m� atie MeM m.um. �+ TRIANGLE WASTEWATER TREATMENT PLANT DURHAM COUNTY, NORTH CAROLINA RECLAIMED WATER PROJECT PROCESS SCHEMATIC & HYDRAULIC PROFILE raw¢T w. eyes-sw%o nc urF: C-iep ouax e. yoappEy]e saT a«ro .* SMfl M (,_2 °bS ° D" h MR: JIME N09 RV. i RD. W.T: dIMN pR(DNOT REWMS FOR C STRUCTION jo s, Summary of Submitted Biomonitoring Test Toxicity Testing Collection Method Used Date Report Outfall Dates of Dates of (*See Submitted to DWQ Number Toxicity Test Type Samples Testing Footnote) Summary of Results 2/8/2011, 2/9/2011- 2/24/2011 001 Chronic Ceriodaphnia dubia (Pass/Fail) 2/10/2011 2/16/2011 *1 Pass (12.87% Reduction) 5/10/2011, 5/11/2011- 5/27/2011 001 IChronic Ceriodaphnia dubia (Pass/Fail) 5/12/2011 5/18/2011 *1 Pass (-12.27% Reduction) 8/9/2011, 8/10/2011- 8/25/2011 001 Chronic Ceriodaphnia dubia (Pass/Fail) 8/11/2011 8/17/2011 *1 Pass (7.27% Reduction) 11/8/2011, 11/9/2011- 11/30/2011 001 Chronic Ceriodaphnia dubia (Pass/Fail) 11/10/2011 11/16/2011 *1 Fail 12/132011, 12/14/2011 - Dilutions Of 22.5%, 45%, 90%, 95%, 1/25/2012 001 Chronic Ceriodaphnia dubia (Dilutions) 12/15/2011 12/21/2011 *1 100%- Pass (ChV > 100%) 1/10/2012, 1/11/2012 - Dilutions Of 22.5%, 45%, 90%, 95%, 1/27/2012 001 Chronic Ceriodaphnia dubia (Dilutions) 1/12/2012 1/18/2012 *1 100%- Pass (ChV > 100%) (Split between Labs) 2/21/2012, 2/22/2012- Pass(10.08% Reduction) 3/13/2012 001 Chronic Ceriodaphnia dubia (Pass/Fail) 2/23/2012 2/29/2012 *1 Pass (-25.90% Reduction) (Split between Labs) 5/15/2012, 5/16/2012- Pass(-2.46% Reduction) 6/8/2012 001 Chronic Ceriodaphnia dubia (Pass/Fail) 5/17/2012 5/23/2012 *1 Pass (6.62% Reduction) 5/15/2012, Chronic Fathead Minnow 5/17/2012, 5/15/2012- Dilutions Of 22.5%, 45%, 75%, 90%, 6/8/2012 001 (Multi -Concentration Test) 5/18/2012 5/22/2012 *2 100% - Pass (ChV > 100%) (Split between Labs) 8/7/2012, 8/8/2012- Pass(4.62% Reduction) 8/28/2012 001 Chronic Ceriodaphnia dubia(Pass/Fail) 1 8/9/2012 1 8/15/2012 1 *11 Pass(8.97% Reduction) (Split between Labs) 11/6/2012, 11/7/2012- Pass(16.88% Reduction) 11/29/2012 001 Chronic Ceriodaphnia dubia (Pass/Fail) 11/8/2012 11/14/2012 *1 Pass (0% Reduction) (Split between Labs) 2/5/2013, 2/6/2013 - Pass (15.27% Reduction) 2/25/2013 001 Chronic Ceriodaphnia dubia (Pass/Fail) 2/7/2013 2/13/2013 *1 Pass (8.51% Reduction) 2/5/2013, Chronic Fathead Minnow 2/7/2013, 2/5/2013- Dilutions Of 22.5%, 45%, 75%, 90%, 2/25/2013 001 (Multi -Concentration Test) 2/8/2013 2/12/2013 *2 100%- Pass (ChV > 100%) (Split between Labs) 5/7/2013, 5/8/2013- Pass(16.10% Reduction) 5/29/2013 001 Chronic Ceriodaphnia dubia (Pass/Fail) 5/9/2013 5/15/2013 *1 Pass (13.80% Reduction) (Split between Labs) 8/6/2013, 8/7/2013- Pass(-17.35% Reduction) 8/23/2013 001 Chronic Ceriodaphnia dubia (Pass/Fail) 8/8/2013 8/14/2013 *1 Pass (5.44% Reduction) (Split between Labs) 11/5/2013, 11/6/2013- Pass(3.41% Reduction) 11/21/2013 001 Chronic Ceriodaphnia dubia (Pass/Fail) 11/7/2013 11/13/2013 *1 Pass (2.01% Reduction) (Split between Labs) 2/4/2014, 2/5/2014- Pass(16.95% Reduction) 2/25/2014 001 Chronic Ceriodaphnia dubia (Pass/Fail) 2/6/2014 2/12/2014 *1 Pass (-5.44% Reduction) (Split between Labs) 5/6/2014, 5/7/2014 - Pass (11.22% Reduction) 6/5/2014 001 Chronic Ceriodaphnia dubia (Pass/Fail) 5/8/2014 5/14/2014 *1 Pass (19.80% Reduction) (Analyzed along side of sample 5/14/2014, 5/14/2014- collected by DWR-RRO) 6/5/2014 001 IChronic Ceriodaphnia dubia (Pass/Fail) 5/15/2014 5/21/2014 *1 Pass (-17.71% Reduction) (Split between Labs) 8/5/2014, 8/6/2014- Pass(-3.89% Reduction) 9/8/2014 001 Chronic Ceriodaphnia dubia (Pass/Fail) 8/7/2014 8/13/2014 *1 I Fail (92% Reduction) (Split between Labs) 11/4/2014, 11/5/2014 - Pass (-14.35% Reduction) 11/20/2014 001 Chronic Ceriodaphnia dubia (Pass/Fail) 1 11/6/2014 1 11/12/2014 *1 Pass (0% Reduction) V 1 4 11/4/2014, Chronic Fathead Minnow 11/6/2014, 11/4/2014 - Dilutions Of 22.5%, 45%, 75%, 90%, 11/20/2014 001 (Multi -Concentration Test) 11/7/2014 11/11/2014 *2 100%- Pass (ChV > 100%) (Split between Labs) 2/3/2015, 2/4/2015- Pass(-7.37% Reduction) 3/2/2015 001 Chronic Ceriodaphnia dubia (Pass/Fail) 2/5/2015 2/11/2015 *1 Pass (10.31% Reduction) (Split between Labs) 5/5/2015, 5/6/2015- Pass(-17.19% Reduction) 6/25/2015 001 lChronic Ceriodaphnia dubia (Pass/Fail) 5/7/2015 5/13/2015 *1 Fail (23.27% Reduction) (Split between Labs) 8/4/2015, 8/5/2015- Pass(5.43% Reduction) 8/25/2015 001 Chronic Ceriodaphnia dubia (Pass/Fail) 8/6/2015 8/12/2015 *1 Pass (-7.8% Reduction) 8/4/2015, Chronic Fathead Minnow 8/6/2015, 8/4/2015- Dilutions Of 22.5%, 45%, 75%, 90%, 8/25/2015 001 (Multi -Concentration Test) 8/7/2015 8/11/2015 *2 100%- Pass (ChV > 100%) *1 = "Short -Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms" 4th Edition, EPA-821-R-02-013, October 2002. Method #1002.0 *2 = "Short -Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms" 4th Edition, EPA-821-R-02-013, October 2002. Method #1000.0 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Cintas Corporation Mailing Address: 1003 Twin Creek Court Durham NC 27703 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Operate industrial laundry F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal producl(s): commercial laundry Raw material(s): detergents builders bleach and sour F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 54,500 GPD ( X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 1,700 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ❑ Yes ® No If subject to categorical pretreatment standards, which category and subcategory? F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 1 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.S and provide the information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Cree Research Inc. Mailing Address: 4600 Silicon Drive Durham NC 27703 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Develop and manufacture silicon carbide crystals F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): LED chips and lighting devices Raw material(s): solvents abrasives adhesives surfactants gases F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intennittent. 170,000 GPD ( X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 266,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 469 Subpart A & B F.S. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 2 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: DuPont Mailing Address: PO Box 13999 Research Triangle Park NC 27709 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Metal finishing processes F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): developmental products (film conductors resistors, di -electric paste) Raw material(s): metal powders. ceramic S olass polymersacids thinners monomers carbon nanotubes F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 1,000 GPD ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 21,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 433.17 F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 3 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.S and provide the information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Biogen (previously Eisai) Mailing Address: 900 Davis Drive Suite B Durham NC 27713 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Pharmaceutical research and manufacturing F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Ariceot Aciphex Tecfdera Raw material(s): acids butanol starches ethanol glycerol nitrogen sucrose F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 54,000 GPD ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 11,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 439 Subparts D & E F.S. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 4 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Irdormatlon for each SIU. If more then one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment rocks. Submit additional pages as necessary Name: GlaxoSmithKline Mailing Address: PO Box 13398 Research Triangle Park NC 27709 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Pharmaceutical research and development F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): R&D laboratories Raw malerial(s): organic and inorganic chemicals F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 6,000 GPD ( X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 181,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 439 Subpart E F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 5 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Mailing Address: Research Triangle Park NC 27709 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Electrochemical production process F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): high Purity chromium metal Raw material(s): F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. GPD ( X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 433 F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes 0 No If yes, describe each episode. Page 6 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.S and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Pearl Therapeutics Inc. Mailing Address: 4222 Emperor Blvd Suite 250 Durham NC 27703 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Pharnaceutcal manufacturing F.S. Principal Product(s) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): meter dose inhalers Raw material(s): clvcopvrrolale propionate fumarale MABA F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 100 GPD ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 600 GPD (X continuous or intermittent) F.T. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 439 Subpart D d E F.S. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode Page 7 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the information requested for each SIU. F.3. Significant Industrial User IMormadon. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Phononic Mailing Address: 800 Capitols Drive, Suite 7 Durham NC 27713 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Manufacture thermo electric devices F.S. Principal Products) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): thermoelectric cooling devices Raw matenal(s): nickel gold F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 3,000 GPD (X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater Flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 2,400 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 469 Subpart A F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets. interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 8 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following information for each SIU. N more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: RTI (formerly NCIDEA) Mailing Address. PO Box 12194 Research Triangle Park NC 27709 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Semiconductor research and development and low scale manufacturing F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): silicon wafer devices Raw material(s): acids bases salts metals wafers solvents plating solutions gases F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 12,000 GPD ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 14,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 469 Subpart A F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 9 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following information for each SIU. H more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant Industrial User Info rrnatlon. Provide the name and address of each SIU discharging to the Vestment works. Submit additional pages as necessary. Name: SCM Metal Mailing Address: PO Box 12166 Research Triangle Park NC 27709 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Manufacture and process metal Powders and brazing Paste F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): cooper, bronze tin wooer oxide metal Powders brazing Paste Raw material(s): metals acids solvents salts F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 8,000 GPD ( X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 13,000 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 471 Subpart J F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Page 10 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the Information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: United Therapeutics Mailing Address: PO Box 14186 Research Triangle Park NC 27709 FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Pharmaceutical manufacturing F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Pdncipal product(s): hypertension drugs Raw materal(s): suffates stearates acetates acetone F.6. Flow Rate. (NO DISCHARGE IN THE LAST YEAR.) a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 4100 GPD ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (GPD) and whether the discharge is continuous or intermittent. 18,500 GPD ( X continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes ❑ No b. Categorical pretreatment standards ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? 40 CFR 439 Subpart D 8 E F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. Pam 11 USGS Current Conditi ATTACHMENT AT SR1100 N... Page 1 of 4 National Water Information System: Web Interface USGS Water Resources Click to hideNews Bulletins USGS Home Contact USGS Search USGS Data Category: Geographic Area: Current Conditions0 United States F-1 j GO 1 • July 9, 2015 - The NWIS Mapper is back online • Try our new Mobile -friendly water data site from your mobile device! • Full News USGS 0209741955 NORTHEAST CREEK AT SR1100 NR GENLEE, NC PROVISIONAL DATA SUBJECT TO REVISION Available data for this site Time -series: Current/Historical ObservationsEf GO j Click to hidestation-specific text This station is operated in cooperation with the Triangle Area Water Supply Monitoring Steering Committee. This station managed by the Raleigh Field Office. Available Parameters All 2 Available Parameters for this site Available Period 00060 Discharge 2007-10-01 2015-08-26 J 00065 Gage height 2007-10-01 2015-08-26 Output format • Graph Graph w/ stats Graph w/o stats Graph w/ (up to 3) parms Table Tab -separated Days (7) Summary of all available data for this site Instantaneous -data availability statement -- or -- j GO I http://waterdata.usgs.gov/nwis/uv?cb_00060=on&cb_00065=on&format=gif default&site... 8/26/2015 ATTACHMENT USGS Current Conditions 1 SR1100 N... Page 2 of 4 Begin date 2015-08-15 Discharge, cubic feet per second End date Most recent instantaneous value: 5.6 08-26-2015 14:45 EDT 2015-08-22 10.0 s 9.8 8.8 N 7.0 L a 6.6 2.0 USGS 0209741955 MBRTHERST CREEK RT SR1100 NR GENLEE, NC Rug Rug Rug Rug Rug Rug Rug Rug 15 16 17 18 19 28 21 22 2815 2815 2815 2815 M5 2015 2015 2815 ---- Provisional Data Subject to Revision ---- Median daily statistic (31 years) — Discharge Add up to 2 more sites and replot for "Discharge, cubic feet per second" Add site numbers Note Enter up to 2 site numbers separated by a comma. A site number consists of 8 to 15 digits I GcF11 Create presentation -quality / stand-alone graph. Subscribe to WaterAlert Share this grag_h T# http://waterdata.usgs.gov/nwis/uv?cb_00060=on&cb_00065=on&format=gif default&site... 8/26/2015 ATTACHMENT 1 USGS Current Conditio 4T SR1100 N... Page 3 of 4 J Gage height, feet Most recent instantaneous value: 3.66 08-26-2015 14:45 EDT 4.08 .� 3.80 w 3.20 USGS 0209741955 NORTHEAST CREEK AT SR1188 NR GENLEE, NC Aug Rug Aug Aug Rug Aug Aug Rug 15 16 17 18 19 28 21 22 2015 2015 2015 2015 2815 2015 2015 2815 ---- Provisional Data Subject to Revision ---- Add up to 2 more sites and replot for "Gage height, feet" Add site numbers Note Enter up to 2 site numbers separated by a comma. A site number consists of 8 to 15 digits I GO_ I Create presentation-ouality / stand-alone graph. Subscribe to WaterAlert Share this graph Questions about sites/data? Feedback on this web site http://waterdata.usgs.gov/nwis/uv?cb_00060=on&cb_00065=on&format=gif default&site... 8/26/2015 USGS Current Conditic ATTACHMENT 1 AT SR1100 N... Page 4 af4 Automated retrievals Help Data Tips Explanation of terms Subscribe for system changes News Accessibility Plug -Ins FOIA Privacy Policies and Notices U.S._Department of the Interior I U.S. Geological Survey Title: USGS Current Conditions for the Nation URL: http://waterdata.usgs.gov/nwis/uv? Page Contact Information: North Carolina Water Data Support Team Page Last Modified: 2015-08-26 15:20:39 EDT 1.1 0.95 sdw 01 http://waterdata.usgs.gov/nwis/uv?cb_00060=.on&cb_00065=on&format=gif default&site... 8/26/2015 Draft 4-2-15 Remedying Discharging Sand Filters I. Practice Summary Description Remedying Discharging Sand Filters is the practice of replacing discharging sand filter onsite wastewater systems serving single family residences, permitted under the general NPDES permit (NCG550000 or NCG570000), with alternatives that reduce nutrient loading to surface waters. Discharging sand filters (DSF's) are residential wastewater treatment systems that use some form of pretreatment beyond the primary treatment a septic tank provides and are permitted to discharge to surface waters, ditches or the ground surface. There are four major types of DSFs and three possible remedies to replace/ repair or eliminate any of these types. Four Major Types of Discharging Sand Filters: 1. Gravity -dosed, single -pass sand filters with regular discharges; 2. Gravity -dosed, single -pass sand filters with no or infrequent discharges (unlined or bottomless systems); 3. Recirculating filters and other advanced discharging systems; 4. Malfunctioning discharging systems (with surfacing effluent that can run offsite) Remedies: 1. Discharging TS-II Equivalent (nitrogen reducing) System 2. TS-II w/Subsurface Soil Dispersal System 3. Connection to Permitted Major NPDES System When implemented these remedies would result in nutrient load reduction credit that can be counted towards load reduction requirements under applicable Division nutrient rules. As discharging systems, DSF's are treated on an individual basis, unlike malfunctioning septic systems, which are addressed on a programmatic improvement basis. Discharging sand filter systems are typically found in areas where drainage issues make soils unsuitable for conventional onsite septic systems. Replacing discharging sand filters with other systems or connecting them to municipal wastewater treatment plants may be a cost effective means to earn nutrient reduction credit for counties and municipalities that have a significant number of these types of systems. In some cases the proximity of existing sewer lines will make connection to permitted NPDES wastewater treatment plant the most viable option. In cases where sewer is either unavailable or cost prohibitive, replacement of the DSF system with a TS-II or equivalent system may still be a cost effective approach to achieve nutrient reductions. Remedy Discharging Sand Filters 1 April 2015 Draft 4-2-15 1j Nutrient Crediting Overview Replacement • Varies depending on type of system being replaced, type of On -Site system it is replaced with, and number of bedrooms each system serves. • Nitrogen: 4.3 lbs/yr (2 BR home) - 10.9 lbs/yr (5 BR home). • Phosphorus:-2.81bs/yr (discharging) - 6.6 lbs/yr (subsurface). Connect to W WTP . 100% reduction credit for the DSF load connected to the W WTP for treatment. Tier Assignment: Tier II The Division utilizes a tiered measures approval system reflecting the level of confidence associated with estimated load reductions and their sustained performance based on review of the information evaluated. The tiers are described in detail in DWR Approval Framework For Alternative Nutrient Load -Reducing Measures. Measures that remedy discharging sandfilters have been assigned a Tier II designation, which reflects the existence of applicable research data. Tier II measures receive the currently established credit at the time of installation for its functioning lifetime along with the potential for increased credit under Existing Development accounting as a result of refinements to the established credit values based on additional research findings. II. Design and Implementation Guidance A. Detailed Practice Descriptions There are three types of creditable measures available for remedying discharging sand filters and malfunctioning discharging systems. 1. Discharging TS-Il Equivalent (nitrogen reducing) System 2. TS-II w/Subsurface Soil Dispersal System 3. Connection to Permitted Major NPDES System 1. Upgrade to Discharging TS-II Equivalent (nitrogen reducing) System This practice involves the installation of a DWR-approved advanced treatment system, which currently includes recirculating sand filters and EZ Treat and Orenco AdvanTex proprietary recirculating media filter systems. 2. Replacement with TS-II System w/Subsurface Soil Dispersal This practice involves the installation of a OWPB-approved advanced treatment system The main difference between this remedy and remedy Remedy Discharging Sand Filters 2 April 2015 t Draft 4-2-15 1 is the dispersal method used for the effluent. This remedy uses an advanced treatment system that disperses effluent to a properly functioning subsurface (onsite) drain -field. For both of these remedies, the exsitu treatment system is the same, but effluent management is different. 3. Connection to Permitted NPDES System This practice involves decommissioning (ending use) of the discharging sand filter or malfunctioning system and connecting the residence to a sewer system and permitted NPDES wastewater treatment system such as a municipal WWTP. B. Design Standards 1. Design Standards for Discharging TS-II Equivalent Advanced Treatment Systems Discharging TS-II equivalent systems permitted by DWR must adhere to the standards, limits, management practices, and reporting requirements provided in the general NPDES permit (NCG550000 or NCG570000) to which they are subject. Electronic versions of each permit can be found on the DWR website here: hU://portal.ncdenr.org/web/­wq/swl2/j2s/­nRdes/g.eneralpgm-dts 2. Design Standards for TS-II Advanced Treatment Systems Major installation requirements for all OWPB approved onsite systems, including requirements such as setbacks from wells, design flows, and minimum vertical separation are established in 15A NCAC 18A .1900 et seq. Specific design elements for all TS-II Advanced treatment systems are addressed through existing regulations provided in 15A NCAC 18A .1969 and 1970. 15A NCAC 18A .1969 "Approval and Permitting of On -Site Subsurface Wastewater Systems, Technologies, Components, or Devices" provides the process through which a product or system not specifically listed in the 15A NCAC 18A .1900 Sewage Treatment and Disposal System rules, can be approved for use in subsurface wastewater systems in North Carolina. 15A NCAC 18A .1970 "Advanced Wastewater Pretreatment Systems" establishes advanced pre-treatment performance standards. It addresses TS-II system effluent quality standards, siting and sizing requirements, vertical separation requirements, horizontal setbacks, and design, installation requirements, inspections, and permitting. Rules 15A NCAC 18A .1900 can be found at: h!W://ehs.pcRublichealth.com/oswR/docs/rules/Aug98amerLpdf Remedy Discharging Sand Filters April 2015 Draft 4-2-15 3. Approval of Experimental and Innovative Systems Onsite wastewater design professionals may propose experimental or innovative systems that remove nutrients better than the system being replaced. Such departure from requirements set forth in 15A NCAC 18A .1900 et seq. requires that an applicant provide technical justification to OWPB of DENR per guidance dated October 2013. This guidance requires information demonstrating that the proposed system design is equally or more protective of water quality than the system being replaced. Vague, anecdotal or isolated evidence is not acceptable. If approved, alternative designs may receive lower regulatory credits, based on case -specific review. Guidance on Experimental & Innovative Laws, Rules & Approval Process - OWPB October 30, 2013 hU:/ /ehs.ncl2ublicheal&com/oswp/docs/ products/IE-Procedures- 10302013.vdf C. Installation / Operation & Maintenance General Installation requirements, maintenance procedures and inspection frequency for OWPB approved TS-11 systems are provided in 15A NCAC 18A .1900 et seq.15A NCAC 18A .1970 Item (1) provides specific installation and construction instructions for approved TS-11 systems. Innovative and experimental systems are required to be installed by a manufacturer -authorized installer according to the manufacturer's installation specifications and system - specific installation conditions prescribed in the products Accepted System approval document on the OWPB website. DWR permitted TS-II equivalent systems must adhere to the standards, limits, management practices, and reporting requirements provided in the general NPDES permit (NCG550000 or NCG570000) to which they are subject. It is recommended that local governments planning to achieve nutrient reduction credit using these measures adopt USEPA 's Decentralized Management Model H to improve the overall management of these discharging systems. The key provisions of this model program include a requirement that service contracts be maintained, inventories of systems, and tracking of service contracts. A link to the USEPA guidance document is provided below. Voluntary National Guidelines for Management of Onsite Wastewater Systems — USEPA March 2003: bt!R://water.ppa.gov/scitech/wastet2Lh/uRload/sgptic t uidelines.odf D. Reporting Performance Verification System performance and reporting for OWPB approved TS-11 systems is described in Item (n) of 15A NCAC 18A .1970. This item requires each installed Remedy Discharging Sand Filters 4 April 2015 Draft 4-2-15 system to be monitored by a certified wastewater treatment facility operator (ORC). Annual performance reports are required and submitted to the local health department by the ORC. The type of monitoring and frequency varies by system type, the designated performance standard, system flow, and history performance. These parameters are described in the systems approval document on the OWPB website and in sub -items (n)(1) through (n)(5) of rule .1970. Site and system compliance with the performance standards is determined by the requirements described in sub -item (o) of the same rule. In order to track credit and ensure continued credit, copies of the system performance reports will be required by DWR. DWR permitted TS-H equivalent systems must adhere to the reporting requirements provided in the general NPDES permit (NCG550000 or NCG570000) to which they are subject to. The performance verification for reductions achieved through connection to a permitted NPDES permitted facility will be handled through the W WTP's annual discharge reports provided to DWR. E. Planning Level Cost Information The cost of implementing the various remedies described in this chapter is highly variable and site specific. For instance, connection to an existing NPDES permitted discharge (WTTP) varies by municipality and can cost as little as $2,500. However, this low end estimate assumes a sewer line is accessible in a location close the home desiring to connect. If existing sewer lines are not nearby, connecting to the city's sewer system can be considerably more expensive and would likely not be a cost-effective option. Advanced TS-II and equivalent systems can range in costs anywhere from $15K to $25K to install depending on soils, topography, and other site specific conditions. Ultimately the cost effectiveness of each remedy must be assessed on a site by site basis by the jurisdiction and homeowner to identify the most cost- effective approach. Remedy Discharging Sand Filters April 2015 Draft 4-2-15 III. Nutrient Credit Estimation and Tier Assignment A. Nutrient Credit Summary This section summarizes the nutrient credit awarded for each of the three remedial alternatives addressing discharging and malfunctioning sand filters. The baseline loading rates and reduction credits included in Table I & II come from Tetra Tech, 2013. For context, the baseline nutrient loading rates for DSF systems are considered to be less than direct septic tank effluent discharge, which is estimated to have per capita nutrient loading rates of 11.0 lbs/cap/yr TN and 1.8 Ibs/cap/yr TP. Replacement systems shall receive the following credits if designed, constructed and maintained in accordance with OWPB Rules. Please note that maintenance of credit is contingent upon compliance with proper maintenance and inspection schedules. Table I. TN Load Reduction Credit Matrix DSF Loading Upgrade to TS-II w/ Connection System Rate Discharging Subsurface to major TS-II Soil NPDES Equivalent Dispersal System* (lb/cap/year) (lb/cap/year) (lb/cap/year) (lb/cap/year) Remedy Loading Rate 4.4 .13 Types of DSFs Remedy Load Reduction Credit Single -pass w/ regular 7 q 3.0 7.3 7.4 discharges Single -pass w/ no or i.4 3.0 7.3 7.4 infrequent discharges Recirculating filters and other advanced discharging 1.4 4.3 14 systems Malfunctioning discharging 7.4 3.0 7.3 7.1 systems * Assumes all load transferred to nnajor NPDES odor Remedy Discharging Sand Filters 6 April 2015 Draft 4-2-15 Table II. TP Load Reduction Credit Matrix DSF Loading Upgrade to TS-II w/ Connection Rate Discharging Subsurface to major System y TS-II Soil NPDES Equivalent Dispersal System" (lb/cap/year) (lb/cap/year) (lb/cap/year) (lb/cap/year) Remedy Loading Rate 1.8 0 — Types of DSFs Remedy Load Reduction Credit Single -pass w/ regular 18 1.8 1.8 discharges Single -pass w/ no or 0.9 (-0.9) 0.9 0.9 infrequent discharges Recirculating filters and other advanced discharging 1.8 1.8 1.8 systems Malfunctioning discharging 18 1.8 1.8 Systems " Assanes all load transferred to major NPDES sector B. Nutrient Load Reduction Credit Method The load estimation method is a straight forward calculation that compares the remedy measure's load to the original estimated load of the DSF. To determine the reduction credit, the load for the remedy is subtracted from the baseline load of the system it is replacing. The loading values in Table I & II above represent the resulting TN & TP load reduction credit values in lbs/cap/year from implementing the listed remedy. To calculate the per unit TN & TP load reduction credit the per capita credits are then multiplied by the number of people in the household where the repair takes place (Table P. Table III. Assumed Number People Per Household of Various Sizes Number of Bedrooms Number of Persons 5 2 1.5 3 2.2 4 2.9 5 3.7 Each Additional 0.7 Remedy Discharging Sand Filters April 2015 i Draft 4-2-15 With discharging systems, it is assumed that the nutrient load delivery is equal to the effluent concentration (i.e., no attenuation of nutrients between the discharge point and surface water) multiplied by an average annual flow estimate. One significant element of load estimation remains unaddressed, that being the extent of landscape attenuation before the practice discharges to flowing waters. Given that the remedies vary from discharging to ground absorption to sewer connections, the effect of landscape attenuation relative to a DSF varies from no difference to significant. In addition, landscape attenuation bears on the absolute estimate of the "before' DSF case. For both reasons, landscape attenuation is particularly relevant to this practice and should be addressed. The Division will seek to do so through a separate process with broader applicability. C. Tier Assignment and Basis Based on the fact that remedy systems have been studied and results were used to develop credits, each of the three remedies for discharging sand filters has been designated as receiving Tier II approval. Tier II measures receive the currently established credit at the time of installation for its functioning lifetime along with the potential for increased credit under Existing Development accounting as a result of refinements to the established credit values based on additional research findings. To evaluate the relative confidence in the measures estimated reduction, Division staff considered a range of factors regarding the technical information supporting the measure. These evaluation factors provided in the document "DWR Approval Process for Alternative Nutrient Load -Reducing Measures" are discussed in sub -items 1-3 below. 1. Supporting Research Summary Supporting research is evaluated using a matrix of factors including the number and diversity of studies, study setting, range of conditions captured, how well a study exemplifies the expected design of a measure, and whether the nutrient measurements of the study represent delivered load or uses delivery assumptions. Each study is further assessed based on study time period, sampling scheme, field methods, and whether or not it is peer reviewed. In some cases not all of these factors may be applicable. With regard to establishing baseline loading estimates for discharging sand filters there is not a significant amount of peer reviewed published data for the exact types of systems used in North Carolina. There is however supporting data specific to the Falls Lake watershed for DSF systems with regular discharges. Baseline loading for these types of systems was estimated using monitoring the data from the DWR-RRO and studies conducted in Durham between 1999-2000 and 2005. The Remedy Discharging Sand Filters 8 April 2015 Draft 4-2-15 dataset includes results from 30 samples from 16 systems collected between 1999-2000 sampling period and 9 samples from 9 systems analyzed in 2008. This data is documented in City of Durham Stormwater Services, 2008. There are no specific studies available addressing malfunctioning DSFs and DSFs with no or infrequent discharge. Baseline loading for these systems is derived from the same supporting research used for DSFs with regular discharges and applying loading assumptions supported by the findings of the Chesapeake Bay On -site Wastewater Expert Panel. The panel's findings are documented in Recommendations of the On -Site Wastewater Treatment Systems Nitrogen Reduction Technology Expert Review Panel, 2014. The loading estimates for the proposed onsite DSF remedies, TS-II and equivalent systems, is based on the OWPB TS-II performance standards which require a 60% reduction in TN. OWPB requires substantiating data to be submitted in conjunction with determination of whether an alternative product qualifies for TS-II approval. The original basis for the assumption nutrient reduction for TS-II systems was made based on multiple studies, some from NC but included data from other states as well. In both cases some of the data was published and peer reviewed while some was not. This data used in conjunction with other published data from the Chesapeake Bay Expert Panel Report is used to estimate potential % reductions in TN and TP for the proposed DSF remedies. The limited amount of North Carolina and watershed specific data available for estimating effluent loads from DSFs systems and their remedies limits the overall diversity of conditions and design types considered. Furthermore, the nutrient measurements provided in the majority of the studies evaluated are end of system effluent loads and do not represent delivered load to surface water. Nutrient loads from DSF systems is highly dependent on site specific characteristics and discharge location relative to surface water, further adding to the uncertainty of the estimated baseline and remedy nutrient loads. 2. Measure Design & Operation Specification Design rules were subjected to a rigorous public process and scrutiny by technical experts, as such these design and operation requirements are considered reliable and sufficient for the purposes of sustained nutrient removal function It is essential to sustained nutrient removal that single- family discharging systems receive ongoing operation and maintenance by a professional management entity or certified contract operator. Overall, while some amount of performance variability must be assumed associated with variation in actual levels of operation, practice O&M specifications are fairly well developed, helping to minimize additional uncertainty regarding operational based loads. Remedy Discharging Sand Filters April 2015 Draft 4-2-15 �. 3. Load Estimation Methods Evaluation of confidence in the load estimation method involves a review of the scope and complexity of the input and operational variables. It also includes determining whether there is supporting research data, user guidance, consideration for physiographic / climatic settings, and the ability for the tool to be updated with future improvements when new research becomes available. In this case, the load estimation method is a straight forward calculation that compares the remedy measure's load from Table II to the original estimated load of the DSF from Table I, which adds no uncertainty to the assessment. IV. Co -Benefits The focus of this guidance is nutrient load reductions through remedying discharging sand filters. However, it is important to recognize that nutrient reducing measures such as those described in this chapter may result in other benefits to the environment and quantifiable ecosystem services that further add to their overall value and desirability. In the case of remedying DSF's, additional benefits may be limited to additional reduction of fecal coliform levels through the elimination of surface discharges or through additional treatment prior to discharge. Remedy Discharging Sand Filters 10 April 2015 Draft 4-2-15 V. References & Resources 15A NCAC 18A .1900 "Laws & Rules for Sewage Treatment & Disposal Systems 15 NCAC 18A .1969 "Approval and Permitting of On -Site Subsurface Waster Water Systems, Technologies, Components, or Devices" 15 NCAC 18A .1970 "Advanced Wastewater Pretreatment Systems" htW:/ /ehs.ncpubfichealth.com/ oswl2/ docs/ rules/ Aug28amen.12 CBPO.2013 Recommendations of the Onsite Wastewater Treatment Systems Nitrogen Reduction Technology Expert Review Panel, Draft Final Report. Onsite Sector Best Management Practices Panel, Chesapeake Bay Program Office, U.S. Environmental Protection Agency. DWR - NPDES General Permits NCG550000 & NCG570000 hit ://vortal.ncdenr.or¢/web/wq/swy/ps/nndes/generaluermits City of Durham Stormwater Services. 2008. Nutrient and Bacteria Characterization of Surface Discharging Sand Filter Systems. DHHS. 2013. Experimental and Innovative Laws, Rules and Approval Process. Prepared by the DHHS DEH Onsite Wastewater Protection Branch (OWPB), October 2013. http:/ /ehs.ncpubhchealth.com/oswp/does/products/IE-Procedures-10302013.1? Hazen and Sawyer. 2013. A Review of Onsite Wastewater System Performance and Nutrient Trading Policy to Support Falls Lake Nutrient Strategy Derielopment. Report Submitted to City of Raleigh Public Utilities Department, January 2013. Metcalf and Eddy. 2003. Wastewater Engineering, Treatment and Reuse. 4th ed. McGraw Hill Higher Education, New York, NY. Tetra Tech. 2013 North Carolina Piedmont Nutrient Load Reducing Measures Technical Report. Report Submitted to Division of Water Resources, September 2013. USEPA. 2003. Voluntary National Guidelines for Management of Onsite Wastewater Systems ham://water.eva.gov/scitech/wastetech/upload/seotic guidelines.pdf Remedy Discharging Sand Filters I I April 2015