Document wgxdRr41BXBOLJoRN4ZLvOaK3

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 01/20/2022 Water CWA Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: Village of Taos Ski Valley Taos Ski Valley WWTP 101 Ocean Boulevard Village of Taos Ski Valley, New Mexico 87525 Post Office Box 100 Taos Ski Valley, New Mexico 87525 Taos 575-776-8220 Anthony Martinez Public Works Director amartrinez@vtsv.org FRS Number: 110002047197 Identification/Permit Number: Media Identifier Number: NAICS: SIC: NM0022101 NA 221320 4952 Personnel participating in inspection: Anthony Martinez Village of Taos Ski Valley David Esparza EPA-R6/ECDWM Public Works Director Environmental Engineer EPA Lead Inspector Signature/Date DAVID David Esparza ESPARZA Digitally signed by DAVID ESPARZA DN: c=US, o=U.S. Government, ou=Environmental Protection Agency, cn=DAVID ESPARZA, 0.9.2342.19200300.100.1.1=68001003655879 Date: 2022.03.04 13:45:05 -07'00' Date Supervisor Signature/Date ROBERTO BERNIER Digitally signed by ROBERTO BERNIER DN: c=US, o=U.S. Government, ou=Environmental Protection Agency, cn=ROBERTO BERNIER, 0.9.2342.19200300.100.1.1=68001003655586 Date: 2022.03.07 07:21:11 -06'00' Roberto Bernier Date 6ENFORM-020-R8.2 (02/12/2020) 1 Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Section I - INTRODUCTION PURPOSE OF THE INSPECTION United States Environmental Protection Agency (EPA) Region 6 inspector David Esparza, PE, arrived at the Village of Taos Ski Valley (Taos Ski Valley) Wastewater Treatment Plant (WWTP) approximately 8:00 AM on January 20, 2022, for an unannounced inspection. I presented my credentials to Mr. Anthony Martinez, Public Works Director and informed him that this was an EPA inspection to determine the facility's compliance under the Clean Water Act (CWA) and the requirements of the National Pollutant Discharge Elimination System (NPDES) permit program, in accordance with the CWA. The generation of this report is based on information supplied by Taos Ski Valley representatives, observations made by the EPA inspector, NMED, and records and reports maintained by the permittee (Taos Ski Valley), and the EPA. Before leaving the facility on January 20, 2022, an exit briefing was held with Mr. Martinez, to explain areas of concern noted at the time of the inspection. It should be noted the WWTP also maintains a discharge permit (DP-1383) issued by the New Mexico Environment Department (NMED), Groundwater Quality Bureau (GWQB) in conjunction with the sludge disposal. FACILITY DESCRIPTION The Village of Taos Ski Valley (VTSV) WWTP facility is classified as a minor discharger with a design capacity of 0.9 MGD serving a year-round population of approximately 500 people and a peak tourist population of approximately 5,000. The facility is located at 38 Ocean Boulevard Taos Ski Valley, Taos County New Mexico or approximately 0.36-miles west of the Village Administration Office, between New Mexico State Road (SR) 150 and Ocean Boulevard in Taos Ski Valley, Taos County, New Mexico (denoted in Aerial Image #1 below). Approximate coordinates to the VTSV WWTP facility are Latitude 3635'48.66" North, Longitude 10527'40.67" West. Site hours will consist of Monday through Friday 7am to 5pm. The existing WWTP is located inside a building to protect it from inclement weather during the winter months. The WWTP treatment process is comprised of a gravity collection system, two (2) lift stations (identified in Table #1), headworks comprised of a grit removal system with a screw pump and bagging system. Flow from the headworks then traverses through a flow control box; thence to two (2) in-ground equalization (EQ) basins, i.e., an anoxic EQ basin with mixers and a steel EQ basin (Appendix 2 VTSV Site Map). The WWTP maintains four (4) 25K gallon aeration basins; thence the flow passes through a splitter box into secondary clarifiers, for settling of the activated sludge; thence the return activated sludge (RAS) is directed to the first aeration basin. A sweeping arm is used to push the floating materials/debris into a scum pit, thence to sludge storage tanks. Solids from the anoxic EQ basin and backwash from the filters and liquids from the sludge dewatering process are returned to the equalization basins where they are 2 Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 processed through the WWTP for rescreening. Wastewater from the clarifiers is pumped to two (2) polishing filters; thence traverse through two (2) ultraviolet ( U V ) disinfection units prior to discharge to the Rio Hondo a tributary to the Rio Grande. Final disposal of the sludge is at the Taos County Land fill. Part of the June 2019 improvement project included the placement of an Ovivo Membrane Bioreactor (MBR) system that provides primary treatment in the WWTP. This MBR system is comprised of multiple sub-systems (Appendix 3 Ovivo MBR Simplified Plant Layout and Flow Diagram), an upgraded UV disinfection system and a Supervisory Control and Data Acquisition (SCADA) instrumentation. Aerial Image #1: Overall view of the Village of Taos Ski Valley's Wastewater Treatment Plant. Aerial from Google Earth maps. Table 1: Village of Taos Ski Valley Lift Stations Lift Station Address 1 Force Main Kachina Lift Station to Kachina Road 2 Kachina approximately 2.5-miles to WWTP Taos Ski Valley does have written policies and procedures to address any potential sanitary sewer overflow events (SSOs), and standard operating procedures (SOPs) pertaining facility operations and 3 Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 maintenance (O&M) and a current Fats, Oils and Grease (FOG) program policy with respect to existing and/or new FOG contributors. Additionally, their Asset Management Plan pertaining to the Sanitary Sewer and Water GIS Database-Methodology & Description was updated in calendar year 2021. Currently, there is no Industrial User (IU) contributing to the WWTP. Section II - OBSERVATIONS I observed the following and/or the following information was provided or stated on January 20, 2022. The June 2019 improvements included upgrades to the WWTP UV disinfection system, a Supervisory Control and Data Acquisition (SCADA) instrumentation and placement of an Ovivo Membrane Bioreactor (MBR) system(Appendix 1 Photograph #3 and Photograph #4). The WWTP maintains an on-site generator for back up that is exercised every two (2) weeks. At the time of the inspection, I was informed that a Sanitary Sewer Overflow (SSO) had occurred in November 2021 and was duly reported. Overall maintenance and operation of the WWTP appeared to be satisfactory. All equipment looked to be running properly. Section III - AREAS OF CONCERN A review of the Integrated Compliance Information System (ICIS) database for the period from April 10, 2019, to January 20, 2022, indicates the following: 1. NPDES permit excursion - Nitrogen Total [as N] - November 2019, December 2019, January 2020, April 2020, January 2021, December 2021 2. NPDES permit excursion - Nitrogen Ammonia Total [as N] - November 2019, December 2019, January 2020, December 2021 3. NPDES permit excursion - Phosphorus Total [as P] - December 2019, January 2020, February 2020, April 2020, May 2020, October 2020, November 2020, March 2021, November 2021, December 2021 4. NPDES permit excursion - Biological Oxygen Demand-5 day (BOD5) - February 2020 EPA Region 6 inspector David Esparza conducted a closing conference at the Village of Taos Ski Valley's WWTP at approximately 10:00 AM on January 20, 2022, for the inspection. 4 Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Section IV - FOLLOW UP The following information was received by EPA on January 27, 2022, after exiting the Facility on January 20, 2022: A summary of the quantity and locations of the Village of Taos Ski Valley's lift station(s). A copy of the current protocols related to Fats, Oils and Grease (FOG) policy/ordinance - Grease Trap Cleaning Log and Policy Standard Operating Procedures (SOP) - Taos Ski Valley NM Control Strategy A summary of the quantity and locations of any lift station(s). Forced main from Kachina Lift Station to Kachina Road Kachina Lift Station to WWTP approximately 2.5 miles A summary of your sanitary sewer overflow (SSO) protocol or Best Management Practices (BMP), inclusive of a spreadsheet type document delineating any/all SSO events specifically with respect to the previous 2-year period (if available). VTSV Spill Reporting Policy Spill Spreadsheet A copy of the current/updated Site Map/Plan VTSV Site and Building plan layout Additional Information requested at the facility Average Flow data 2020-2021 The Village of Taos Ski Valley - Asset Management Plan Section V - LIST OF APPENDICES Appendix 1 - Photo Log - 5 photos taken 1/20/2022 Appendix 2 - Village of Taos Ski Valley WWTP Site Map Appendix 3 - Ovivo MBR Simplified Plant Layout and Flow Diagram Appendix 4 - A Review of the Integrated Compliance Information System (ICIS) Database for the period from April 10, 2019, to January 20, 2022 5 Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Appendix 1 Photograph Log UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Photo No. 1 Location: Taos Ski Valley Wastewater Treatment Plant City: Village of Taos Ski County/Parish: Taos State: New Mexico View of one (1) of the two (2) in-ground equalization (EQ) basins, i.e., an anoxic EQ basin with mixers and a steel EQ basin after receipt of flow from the headworks. (DSCN2108). Photographed by D. Esparza UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Photo No. 2 Location: Taos Ski Valley Wastewater Treatment Plant City: Village of Taos Ski County/Parish: Taos State: New Mexico Another view of the in-ground equalization (EQ) basins. (DSCN2109). Photographed by D. Esparza UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Photo No. 3 Location: Taos Ski Valley Wastewater Treatment Plant City: Village of Taos Ski County/Parish: Taos State: New Mexico View of the upgraded UV disinfection system in conjunction with the Ovivo Membrane Bioreactor (MBR) system. (DSCN2113). Photographed by D. Esparza UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Photo No. 4 Location: Taos Ski Valley Wastewater Treatment Plant City: Village of Taos Ski County/Parish: Taos State: New Mexico A view of a portion of the Ovivo Membrane Bioreactor (MBR) system. (DSCN2114). Photographed by D. Esparza UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Photo No. 5 Location: Taos Ski Valley Wastewater Treatment Plant City: Village of Taos Ski County/Parish: Taos State: New Mexico View of the WWTP's Outfall into the Rio Hondo a tributary to the Rio Grande. Note: no visible staining, aromatics or stressed vegetation was observed. (DSCN 2118). Photographed by D. Esparza Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Appendix 2 Village of Taos Ski Valley WWTP Site Map Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Appendix 3 Ovivo MBR Simplified Plant Layout and Flow Diagram Simplified Plant Layout and Flow Diagram Influent Headworks PA Basin 2 AXP 1 MBR Basin 1/2 PreAnoxic Basin Preaeration Basin 1 PA Basin 3 PA Blowers AXP 2 MBR Basin 3/4 RAS Rescreen UV Permeate Collection Effluent UV MBR Blowers WAS Village of Taos Ski Valley/Taos Ski Valley WWTP Permit No. NM0022101 Inspection Date 01/20/2022 Appendix 4 A Review of the Integrated Compliance Information System (ICIS) Database for the period from April 10, 2019, to January 20, 2022 2/16/22, 3:42 PM FE&C NPDES AIR ICIS: Search Violation Results Admin Reports Help DESPARZA Logout Search Permits Related NPDES Violations ADD SINGLE EVENT VIOLATION List of Violations Related to the Permit Violation Type Violation Information Violation Violation Code Date RNC Detection Code-Date Record Numbers 1 to 49 RNC Resolution Action Code-Date 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C2 11/30/2019 T-12/31/2019 2-07/31/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 11/30/2019 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 11/30/2019 T-12/31/2019 2-04/30/2020 Effluent Gross Season ID:0 C2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 11/30/2019 Effluent Gross Season ID:0 C3 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 Q1 12/31/2019 T-12/31/2019 2-07/31/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C2 12/31/2019 T-12/31/2019 2-07/31/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 12/31/2019 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2019 T-12/31/2019 2-04/30/2020 Effluent Gross Season ID:0 Q1 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2019 Effluent Gross Season ID:0 Q2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2019 T-12/31/2019 2-04/30/2020 Effluent Gross Season ID:0 C2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2019 Effluent Gross Season ID:0 C3 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 Q2 12/31/2019 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C2 12/31/2019 V-02/29/2020 2-07/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 12/31/2019 https://icis.epa.gov/icis/permit/SearchViolation.do?fromSearchCriteriaPage=true&compositeKey=3601214741@NPD&navActivityId=3601214741&nav... 1/4 2/16/22, 3:42 PM ICIS: Search Violation Results Violation Type Violation Information Violation Violation Code Date RNC Detection RNC Resolution Action Code-Date Code-Date 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C2 01/31/2020 T-01/31/2020 2-07/31/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 01/31/2020 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 01/31/2020 Effluent Gross Season ID:0 Q2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 01/31/2020 T-01/31/2020 2-04/30/2020 Effluent Gross Season ID:0 C2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 01/31/2020 Effluent Gross Season ID:0 C3 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 Q1 01/31/2020 T-02/29/2020 2-07/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 Q2 01/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C2 01/31/2020 T-02/29/2020 2-07/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 01/31/2020 001 A 00310 BOD, 5-day, 20 deg. C Effluent Effluent Violation E90 Gross Season ID:0 Q1 02/29/2020 001 A 00310 BOD, 5-day, 20 deg. C Effluent Effluent Violation E90 Gross Season ID:0 Q2 02/29/2020 001 A 00310 BOD, 5-day, 20 deg. C Effluent Effluent Violation E90 Gross Season ID:0 C2 02/29/2020 001 A 00310 BOD, 5-day, 20 deg. C Effluent Effluent Violation E90 Gross Season ID:0 C3 02/29/2020 DMR Non- 001 A 00665 Phosphorus, total [as P] Effluent D90 Receipt Violation Gross Season ID:0 Q1 02/29/2020 N-04/15/2020 2-10/15/2020 DMR Non- 001 A 00665 Phosphorus, total [as P] Effluent D90 Receipt Violation Gross Season ID:0 Q2 02/29/2020 K-04/15/2020 2-10/15/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C2 02/29/2020 V-02/29/2020 2-07/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 02/29/2020 001 A 81010 BOD, 5-day, percent removal Effluent Violation Effluent Gross Season ID:0 C1 E90 02/29/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C2 04/30/2020 T-04/30/2020 2-07/31/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 04/30/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 04/30/2020 https://icis.epa.gov/icis/permit/SearchViolation.do?fromSearchCriteriaPage=true&compositeKey=3601214741@NPD&navActivityId=3601214741&nav... 2/4 2/16/22, 3:42 PM ICIS: Search Violation Results Violation Type Violation Information Violation Violation Code Date RNC Detection RNC Resolution Action Code-Date Code-Date 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:1 C2 05/31/2020 V-05/31/2020 2-07/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:3 C2 10/31/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C2 11/30/2020 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 11/30/2020 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C2 01/31/2021 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 01/31/2021 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 03/31/2021 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C2 11/30/2021 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 11/30/2021 001 A 00600 Nitrogen, total [as N] Effluent Gross Effluent Violation E90 Season ID:0 C3 12/31/2021 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2021 Effluent Gross Season ID:0 Q2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2021 Effluent Gross Season ID:0 C2 001 A 00610 Nitrogen, ammonia total [as N] Effluent Violation E90 12/31/2021 Effluent Gross Season ID:0 C3 001 A 00665 Phosphorus, total [as P] Effluent Effluent Violation E90 Gross Season ID:0 C3 12/31/2021 Record Numbers 1 to 49 ICIS Home Reports Help Logout Technical issues? Contact user support Help Desk at (202) 564-7756 or via email at ICIS@epa.gov https://icis.epa.gov/icis/permit/SearchViolation.do?fromSearchCriteriaPage=true&compositeKey=3601214741@NPD&navActivityId=3601214741&nav... 3/4 2/16/22, 3:42 PM ICIS: Search Violation Results https://icis.epa.gov/icis/permit/SearchViolation.do?fromSearchCriteriaPage=true&compositeKey=3601214741@NPD&navActivityId=3601214741&nav... 4/4