This Document Provides Pertinent Information Concerning the Reissuance of the VPDES Permit Listed Below
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This document provides pertinent information concerning the reissuance of the VPDES Permit listed below. This permit is being processed as a Minor, Municipal permit. The discharge results from the operation of a 0.667 MGD wastewater treatment plant, with an expansion flow tier of 0.94 MGD. This permit action consists of updating the proposed effluent limits to reflect the current Virginia Water Quality Standards (effective June 5, 2017) and updating permit language as appropriate. The effluent limitations and special conditions contained within this permit will maintain the Water Quality Standards of 9VAC25-260 et seq. 1. Facility Name and Mailing Gordonsville Sewage Treatment Plant SIC Code: 4952 WWTP Address: NAICS Code: 221320 Sewage P.O. Box 148 Treatment Facility Ruckersville, VA 22968 Facility Location: 735 Hill Road County: Orange Gordonsville, VA 22942 Facility Contact / Title: Edwin Jarrell / Plant Superintendent Telephone Number: (434) 985-7811 Facility Email Address: [email protected] 2. Permit No.: VA0021105 Expiration Date: March 19, 2018 Other VPDES Permits: VAN030046 Other Permits: None E2/E3/E4 Status: Not Applicable 3. Owner Name: Rapidan Service Authority Owner Contact / Title: Timothy L. Clemons / Telephone Number: (434) 985-7811 General Manager Owner Email Address: [email protected] 4. Application Complete Date: September 12, 2017 Permit Drafted By: Caitlin Shipman Date Drafted: May 23, 2018 Draft Permit Reviewed By: Ann Zimmerman Date Reviewed: May 30, 2018 Draft Permit Reviewed By: Alison Thompson Date Reviewed: June 26, 2018 Public Comment Period : Start Date: February 15, 2019 End Date: March 18, 2019 5. Receiving Waters Information: See Attachment 1 for the Flow Frequency Determination. Receiving Stream Name: UT to South Anna River Stream Code: 8-XAFO Drainage Area at Outfall: 0.9 mi2 River Mile: 0.23 Stream Basin: York River Subbasin: None Section: 3 Stream Class: III Special Standards: None Waterbody ID / 6th Order HUC: VAN-F01R / YO01 7Q10 Low Flow: 0.0 MGD* 7Q10 High Flow: 0.0 MGD 1Q10 Low Flow: 0.0 MGD* 1Q10 High Flow: 0.0 MGD 30Q10 Low Flow: 0.0 MGD* 30Q10 High Flow: 0.0 MGD Harmonic Mean Flow: 0.0 MGD* 30Q5 Flow: 0.0 MGD * It is staff’s professional judgment that when a drainage area is 5 mi2 or less, the critical flows are equal to 0.0 MGD. 6. Statutory or Regulatory Basis for Special Conditions and Effluent Limitations: X State Water Control Law EPA Guidelines X Clean Water Act X Water Quality Standards X VPDES Permit Regulation Other (PES, Occoquan Policy, Dulles) X EPA NPDES Regulation 7. Licensed Operator Requirements: Class II 8. Reliability Class: Class II 9. Facility / Permit Characterization: Private Effluent Limited Possible Interstate Effect Federal X Water Quality Limited Compliance Schedule State X Whole Effluent Toxicity Program Interim Limits in Permit X POTW X Pretreatment Program Interim Limits in Other Document X eDMR Participant X Total Maximum Daily Load (TMDL) VPDES PERMIT PROGRAM FACT SHEET VA0021105 PAGE 2 of 17 10. Wastewater Sources and Treatment Description: The Gordonsville Sewage Treatment Plant receives influent from the Town of Gordonsville and sanitary wastewater from Klöckner Pentaplast plant and Dominion Gordonsville Power Station. In 1987, the facility was expanded to include the overland flow system to polish the effluent from the existing aerated lagoon system. Influent flows through a bar screen and is monitored before entering into a transfer pump, known as the splitter box, which can send flows either to an unlined equalization basin or an unlined aerated lagoon. Debris from the bar screen are disposed of in a dumpster on site, which is then emptied and hauled off site approximately every other week. The equalization basin is mainly used for storage during rain events. During the site visit, DEQ staff was informed that all flows from the equalization basin are sent to the aerated lagoon. The aerated lagoon typically has two aerators in operation; however, during the site visit only one aerator was operational. Flow is sent from the aerated lagoon to a clarifier. The clarifier is divided into two sections; however, only one was operational during the site visit. Sludge from the clarifiers is returned to the splitter box, which is cleaned on an as needed basis. From the clarifiers, flow enters a baffled pump station and is disinfected by chlorine. After disinfection, flow is sent to the pond pump station. Chlorine contact time is accomplished through the baffled pump station and the pipeline leading to the pond pump station. In the event that additional chlorine contact time is necessary, flow can be pumped into the one day pond, which would be used as a chlorine contact basin and the residual will be monitored at the pump station wet well prior to being pumped onto the spray fields. However, additional chlorine contact time is typically not need. The pond pump station can send flows either to the one day pond, storage pond, or to the wet well for the overland flow system. Both ponds are unlined. The storage pond has a capacity of 25 million gallons; therefore, the facility has the ability of going for extended periods of times without discharging. The flow is then sprayed over 37 acres of fields. These fields are divided into 10 zones; operators can choose which zone to spray on and for how long. The fields are mowed to maintain the vegetation. Collection ditches surround the fields and funnel the discharge to one point, where the flow is measured and undergoes post aeration before being discharged into the receiving stream. See Attachment 2 for a facility schematic/diagram. TABLE 1 OUTFALL DESCRIPTION Number Discharge Sources Treatment Design Flow Latitude / Longitude 001 Domestic and Commercial Wastewater See Section 10 0.667 MGD, 0.94 MGD 38.125841 / -78.199725 See Attachment 3 for the topographic map of Boswells Tavern (172C). 11. Sludge Treatment and Disposal Methods: An anaerobic digester and drying beds are on site; however, they are no longer operational. During the site visit, DEQ staff was informed that wasting is not needed, as settling occurs in the lagoons and ponds and any remaining solids are taken up on the fields. The digester and drying beds have been out of use for approximately 18 years. VPDES PERMIT PROGRAM FACT SHEET VA0021105 PAGE 3 of 17 12. Other Discharges, Intakes, Monitoring Stations, Other Items (Located Within Waterbody YO01): TABLE 2 DISCHARGES, INTAKES & MONITORING STATIONS ID / Permit Facility Name Type Receiving Stream Number VAG406484 Haney Heather and Carol Residence Bowles Creek, UT VAG406049 Neighborhood Properties LLC Domestic Sewage GP VAG406455 Green Springs Estates LLC South Anna River, VAG406571 Gholson Adam Residence UT VAR050848 Stormwater Industrial GP Klockner Pentaplast of America VAG250135 Cooling Water Discharge GP Nonmetallic Mineral Mining VAG840026 Virginia Vermiculite Limited GP South Anna River VA0087033 Dominion - Gordonsville Power Station VA0076678 Shenandoah Crossing STP VPDES IP Lickinghole Creek VA0091332 Old Dominion Electric Cooperative - Louisa Happy Creek, UT 8-SAR101.03 Ambient DEQ Monitoring Station South Anna River 8-SAR097.82 Ambient and Biological 13. Material Storage: TABLE 3 MATERIAL STORAGE Materials Description Volume Stored Spill/Stormwater Prevention Measures Chlorine Gas 4 - 150 lb. cylinders Stored inside building. Sodium Hypochlorite 5 - 15 gallon barrels 14. Site Inspection: DEQ-NRO Water Permitting staff, Caitlin Shipman, and DEQ-NRO Water Compliance staff, Rebecca Johnson, conducted a recon inspection on September 26, 2017 (Attachment 4). 15. Receiving Stream Water Quality and Water Quality Standards: a. Ambient Water Quality Data This facility discharges to an unnamed tributary to South Anna River that has been neither monitored nor assessed. The nearest DEQ monitoring station is 8-SAR101.03, at Route 231, approximately 0.78 miles upstream of the confluence of unnamed tributary 8-XAF with South Anna River. The following is the water quality summary for this segment of South Anna River, as taken from the 2016 Integrated Report: Class III, Section 3. DEQ monitoring stations located in this segment of South Anna River: • Ambient monitoring station 8-SAR101.03, at Route 231. E. coli monitoring finds a bacterial impairment, resulting in an impaired classification for the recreation use. A bacteria TMDL for the South Anna River watershed has been completed and approved. The aquatic life and wildlife uses are considered fully supporting. An observed effect for the aquatic life use is noted for total phosphorus, based on the information from the 2006 Integrated Assessment and an observed effect was noted based on biological monitoring from the 2010 Integrated Assessment. The nearest downstream DEQ monitoring station is 8-SAR097.82, at Route 603, approximately 2.7 miles downstream from Outfall 001. The following is the water quality summary for this segment of South Anna River, as taken from the 2016 Integrated Report: VPDES PERMIT PROGRAM FACT SHEET VA0021105 PAGE 4 of 17 Class III, Section 3c. DEQ monitoring stations located in this segment of South Anna River: • Ambient and biological station 8-SAR097.82, at Route 603. E. coli monitoring finds a bacterial impairment, resulting in an impaired classification for the recreation use. A bacteria TMDL for the South Anna River watershed has been completed and approved. Biological monitoring finds benthic macroinvertebrate impairments, resulting in an impaired classification for the aquatic life use. An observed effect for the aquatic life use is noted for total phosphorus, based on the information from the 2006 Integrated Assessment. The fish consumption use is considered fully supporting with an observed effect based on PCBs in fish tissue. The wildlife use is considered fully supporting. b. 303(d) Listed Stream Segments and Total Maximum Daily Loads (TMDLs) TABLE 4 INFORMATION ON DOWNSTREAM 303(d) IMPAIRMENTS AND TMDLs Waterbody Impaired Year First Listed Distance TMDL Basis for Cause WLA Name Use as Impaired From Outfall Completed WLA Impairment Information in the 2016 Integrated Report: Pamunkey 126 cfu River Basin 1.64E+12 /100 mL Bacteria TMDL Recreation E.