This Document Gives Pertinent Information Concerning the Reissuance of the VPDES Permit Listed Below
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This document gives 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 0.005 MGD wastewater treatment plant. This permit action consists of updating the proposed effluent limits to reflect the current Virginia WQS (effective June 5, 2017) and updating permit language as appropriate. The effluent limitations and special conditions contained in this permit will maintain the Water Quality Standards of 9VAC25-260 et seq. 1. Facility Name and Mailing Rappahannock County High School SIC Code : 4952 WWTP Address: 6 Schoolhouse Road NAICS Code: 221320 Sewage Treatment Washington, VA 22747 Facility Facility Location: 12576 Lee Highway County: Rappahannock Washington, VA 22747 Facility Contact Name: Robin Bolt, Facilities Director Telephone Number: 540-227-0023 Facility E-mail Address: [email protected] Expiration Date of 2. Permit No.: VA0064181 September 16, 2019 previous permit: Other VPDES Permits associated with this facility: NA Other Permits associated with this facility: Air Registration No. 40327; Petroleum ID 3041833 E2/E3/E4 Status: NA 3. Owner Name: Rappahannock County School Board Owner Contact/Title: Shannon Grimsley, Superintendent Telephone Number: 540-227-0023 Owner E-mail Address: [email protected] 4. Application Complete Date: March 20, 2019 Permit Drafted By: Ann Zimmerman Date Drafted: August 27, 2019 Draft Permit Reviewed By: Douglas Frasier Date Reviewed: September 23, 2019 Draft Permit Reviewed By: Alison Thompson Date Reviewed: October 15, 2019 Public Comment Period : Start Date: October 31, 2019 End Date: December 2, 2019 5. Receiving Waters Information: See Attachment 1 for the Flow Frequency Determination Receiving Stream Name : Covington River, UT Stream Code: 3-XDG Drainage Area at Outfall: 168 acres, 0.26 sq. mi.1 River Mile: 0.05 Stream Basin: Rappahannock River Subbasin: None Section: 4 Stream Class: III Waterbody ID: VAN-E05R Special Standards: None 6th Order HUC: RA12 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 1 The drainage area at Outfall 001 has been updated, therefore the drainage area provided in the Flow Frequency Determination (Attachment 1), no longer is consistent with the new information provided in the Planning Statement (Attachment 5). It is staff’s professional opinion, based upon the minimal drainage area at the point of discharge that the stream provides little to no mixing during critical conditions, therefore, limitations have been established based upon critical 7Q10, 1Q10 and 30Q10 flows of 0.0 MGD to ensure protection of existing uses as all times. 6. Statutory or Regulatory Basis for Special Conditions and Effluent Limitations: X State Water Control Law X 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: IV 8. Reliability Class: Class II 9. Permit Characterization: Private Effluent Limited Possible Interstate Effect Federal X Water Quality Limited Compliance Schedule Required State Whole Effluent Toxicity Program Required Interim Limits in Permit X POTW Pretreatment Program Required Interim Limits in Other Document X TMDL X e-DMR Participant VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 2 of 10 10. Wastewater Sources and Treatment Description: Treatment at this facility consists of a grease trap, septic tank, a dosing chamber, a distribution box, three 3-foot deep sand filter beds approximately 20 feet by 20 feet square, chlorination, dechlorination, and post-aeration. The wastewater flows into the grease trap, the septic tank, and then the dosing chamber. Light soda ash is added manually to the dosing chamber for pH control. Dosing bells automatically send flow from the dosing chamber to the distribution box and then to the sand filter beds. After the sand filters, the sewage effluent travels through a re-circulation tank, it is then chlorinated and dechlorinated using tablets, and post-aerated before discharge. Compliance sampling is conducted at the v-notch weir after post aeration. Approximately 300 students in grade 8 through grade 12 attend the high school and 80 staff work at the high school. The typical school year is mid-August through mid-May with breaks in the winter and spring. See Attachment 2 for a facility schematic/diagram. TABLE 1 – Outfall Description Outfall Outfall Discharge Sources Treatment Design Flow Latitude and Number Longitude Domestic Wastewater 38° 41’ 05” N 001 See Item 10 above. 0.005 MGD from a Public School. 78° 11’ 25” W See Attachment 3 for topographic map. 11. Sludge Treatment and Disposal Methods: Solids from this facility are collected in a septic tank. The septage is removed one to two times per year and is shipped to the Remington WWTP (VA0076805) for further treatment and disposal. 12. Discharges and Monitoring Stations in Vicinity of Discharge: TABLE 2 – Discharges within 6th Order HUC RA12 Permit Number Facility Permit Type Receiving Stream VA0091651 Rush River Wastewater Treatment Plant VPDES IP Rush River VA0022471 Rappahannock County Elementary School VPDES IP Rush River, UT VA0064181 Rappahannock County High School VPDES IP Covington River, UT Potable Water VAG640039 Washington Town Water Treatment Plant Rush River Treatment Plant GP Ambient and biological monitoring station located at Route 621 approximately 2.9 miles downstream 3-COV001.95 from the Outfall. 13. Material Storage: TABLE 3 - Material Storage Materials Description Volume Stored Spill/Stormwater Prevention Measures Sanuril 1-2 buckets Dechlor 1-2 buckets Stored in storage shed. Soda Ash 1-2 50-pound bags VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 3 of 10 14. Site Inspection: A facility recon inspection was performed by DEQ-NRO Water Compliance Staff on April 8, 2019 and April 12, 2018. A Technical and Laboratory Inspection was performed by DEQ-NRO Water Compliance Staff on October 22, 2015 (See Attachment 4). A site visit was conducted by DEQ-NRO Water Permit Writer on August 29, 2019 to confirm site conditions and information submitted in the application. 15. Receiving Stream Water Quality and Water Quality Standards: a. Ambient Water Quality Data This facility discharges to an unnamed tributary to Covington River that has been neither monitored nor assessed. DEQ ambient and biological monitoring station 3-COV001.95 is located on Covington River at Route 621, approximately 2.9 miles downstream from Outfall 001. The following is the water quality summary for this segment of Covington River, as taken from the 2018 Integrated Report: Class III, Section 4. DEQ monitoring stations located in this segment of Covington River: ambient and biological monitoring station 3-COV001.95 at Route 621 The aquatic life use is considered fully supporting based on biological monitoring and conventional parameter data. The recreation use is considered fully supporting. The fish consumption and wildlife uses were not assessed. b. 303(d) Listed Stream Segments and Total Maximum Daily Loads (TMDLs) TABLE 4 - Information on Downstream 303(d) Impairments and TMDLs Year Distance Waterbody First TMDL Basis for Impaired Use Cause From WLA Name Listed as completed WLA Outfall Impaired Impairment Information in the 2018 Integrated Report 126 Rappahannock 8.66E+09 cfu/100ml River Basin Thornton River Recreation E. coli 2006 14 miles cfu/year E. coli Bacteria E. coli --- 01/23/2008 0.005 MGD Fish PCBs in Fish 2004 88 miles No --- --- Consumption Tissue This facility is accounted for in the Chesapeake Bay Rappahannock TMDL NPDES Permit Aquatic Life / River Dissolved Chesapeake Bay Inventory and is part of an Open Water 2008 90 miles Oxygen 12/29/2010 aggregated WLA for total Aquatic Life nitrogen, total phosphorus, and total suspended solids (Appendix Q). The Rappahannock River, which is located approximately 88 miles downstream of this facility, is listed with a PCB impairment. In support of PCB TMDL development, this facility is a candidate for low-level PCB monitoring, based on its designation as a minor municipal discharger. Low-level PCB analysis uses EPA Method 1668, which is capable of detecting low-level concentrations for all 209 PCB congeners. DEQ staff has concluded that low-level PCB monitoring is not warranted for this facility as it is not expected to discharge or be a source of PCBs; therefore, low-level PCBs monitoring will not be requested for this facility. Significant portions of the Chesapeake Bay and its tributaries are listed as impaired on Virginia’s 303(d) list of impaired waters for not meeting the aquatic life use support goal, and the 2018 Virginia Water Quality Assessment 305(b)/303(d) Integrated Report indicates that much of the mainstem Bay does not fully support this use support goal under Virginia’s Water Quality Assessment guidelines. Nutrient enrichment is cited as one of the primary causes of impairment. EPA issued the Bay TMDL on December 29, 2010. It was based, in part, on the Watershed Implementation Plans developed by the Bay watershed states and the District of Columbia. VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 4 of 10 The Chesapeake Bay TMDL addresses all segments of the Bay and its tidal tributaries that are on the impaired waters list. As with all TMDLs, a maximum aggregate watershed pollutant loading necessary to achieve the Chesapeake Bay’s water quality standards has been identified. This aggregate watershed loading is divided among the Bay states and their major tributary basins, as well as by major source categories [wastewater, urban storm water, onsite/septic systems, agriculture, air deposition]. Fact Sheet Section 17.e provides additional information on specific nutrient monitoring for this facility to implement the provisions of the Chesapeake Bay TMDL.