Document mq4XY1RLQBVeJnm8m6J38xmzb

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 09/17/2025 Water NPDES Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: Laguna Development Corporation Casa Blanca Wastewater Treatment Plant (WWTP) Southeast of the intersection of Interstate 40 (I-40) and Casa Blanca Road (aka Indian Service Route #23) Pueblo of Laguna, Cibola County, New Mexico 14500 Central Avenue SW Albuquerque, New Mexico 87121 Bernalillo 505-463-0873 Glenn Trotter Level 2 Operator gtrotter@POLDC.com FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: 110020039340 NM0030678 N/A 221320 4952 Personnel participating in inspection: Glen Trotter Casa Blanca/Rio Puerco WWTP David A. Esparza USEPA/6ECDWM Operator Environmental Engineer EPA Lead Inspector Signature/Date DAVID ESPARZA Date: 2025.10.02 11:58:40 -06'00' Digitally signed by DAVID ESPARZA David Esparza Date Supervisor Signature/Date ROBERTO BERNIER Date: 2025.10.02 14:15:28 -05'00' Digitally signed by ROBERTO BERNIER Roberto Bernier Date 6ENFORM-019-R9 (02/27/2025) 1 Section I - INTRODUCTION Laguna Development Corporation / Casa Blanca WWTP Permit No. NM0030678 Inspection Date 09/17/2025 PURPOSE OF THE INSPECTION EPA Region 6 inspector David Esparza, PE, arrived at the Casa Blanca Wastewater Treatment Plant (WWTP) operated via contract by the Laguna Development Corporation (LDC) at approximately 8:30 AM on September 17, 2025, for an announced inspection. I met with Mr. Trotter and presented my credentials and informed him that this was an EPA inspection to determine Casa Blanca's WWTP compliance under the Clean Water Act (CWA). This compliance evaluation inspection (CEI) was conducted under the authority 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 Laguna Development representatives, observations made by the United States Environmental Protection Agency (US EPA) inspector, and records and reports maintained by the permittee, and the US EPA. FACILITY DESCRIPTION The WWTP is a minor discharger with a design flow capacity of 0.19 MGD (million gallons per day). PrePandemic, the average daily discharge flow was 55k-gallons per day (gpd). It is currently averaging between 35k to 45k gpd. The facility is located approximately 0.30-miles southeast of the intersection of U.S. Interstate 40 (I-40) and Indian Service Route #23, Cibola County, New Mexico (depicted in Aerial Image #1 below). The WWTP facility serves the Dancing Eagle Casino/administrative buildings, restaurant, high school, senior center, residential area, fire station and travel center. The WWTP is overseen by Level 2 Operator Mr. Glenn Trotter on a 24-hour and 365-day schedule. Aerial Image #1: Overall view of the Laguna Development Corporation- Casa Blanca Wastewater Treatment Plant location. Note: the evaporative lagoon cells. Aerial from Google Earth Maps. 2 Laguna Development Corporation / Casa Blanca WWTP Permit No. NM0030678 Inspection Date 09/17/2025 The treatment works are a Kubota TM Membrane Bioreactor (MBR) employing two (2) basins with 4 plate cartridges in each basin. The 2 basins operate simultaneously except during brief times when maintenance is being performed on one (1) unit. The combined twin MBR design flow is 0.19 MGD with peak flow capability of 0.38 MGD. A Supervisory Control and Data Acquisition (SCADA) system provides around the clock monitoring of WWTP operations. The influent is piped using three (3) lift stations (LS) (Table 1 below) through an automated fine screen, thence into a single anoxic tank under constant mixing. Wastewater then enters an aerated tank via gravity flow, thence continues to the MBR basins. The mixed liquor suspended solids from the MBR basins is returned to the anoxic tank, thence the treated permeate is gravity flowed through the storage tank to the outfall structure, with chlorine injection on the outlet side. Se Table 1 Casa Blanca Lift Stations Name WWTP #1 WWTP #2 Burger King Location Northwest corner inside WWTP fenced perimeter North outside of WWTP fenced perimeter West side of drive-thru next to building Comment Vault (concrete) was replaced, and LS was serviced circa early 2020. Locked hatchway w/ safety gate. Vault (concrete) was replaced, and LS was serviced circa early 2020. Locked hatchway w/ safety gate. Lacks secure perimeter fencing, alarms (either audible or flashing light) or signage. Vaults were cleaned, serviced and new pumps were installed circa early 2020. New electrical upgrades are planned. Waste sludge is drawn from the recycle line and placed into a series of five (5) lined aerated lagoons for extended treatment. All pumps, blowers and the entire facility have a backup generator arranged to automatically run as required. The disinfected effluent is discharged through Outfall 001 to Acoma Creek (Latitude 35 01' 37" North and Longitude 107 28' 11" West), thence to the Rio San Jose. The Rio San Jose is a perennial stream. It becomes intermittent when flow is diverted during the growing season for irrigation water within the village jurisdictions. The flow in the lower reaches of the Rio San Jose below the Highland Meadows area flows year-round to its convergence with the Rio Puerco between the Pueblos of Laguna and Isleta. Section II - OBSERVATIONS I observed the following and/or the following information was provided and/or stated: The operator (Mr. Trotter) oversees this facility Casa Blanca WWTP (NM0030678) and Rio Puerco WWTP (NM0030686) on an individual employee basis full-time. These two (2) facilities are located approximately 30-miles apart. Additionally, he is responsible for sample collection and operation and maintenance (O&M) associated with both facilities. 3 Laguna Development Corporation / Casa Blanca WWTP Permit No. NM0030678 Inspection Date 09/17/2025 A Supervisory Control and Data Acquisition (SCADA) system provides around the clock monitoring of WWTP operations. Effluent totalizing flow meter readings are recorded daily. The WWTP maintains three (3) lift station (LS) (Table 1 above). The WWTP currently utilizes sodium bisulfite for de-chlorination of the effluent prior to discharge at Outfall 001. Section III - AREAS OF CONCERN A review of the Integrated Compliance Information System (ICIS) database for the period from January 1, 2022, to September 25, 2025 (Appendix 1) indicates NPDES permit excursions with respect to Escherichia coli (E coli) (February 29, 2024, March 31, 2024 and May 31, 2024), Enterococci (December 31, 2022, February 29, 2024, March 31, 2024 and May 31, 2024), and Total Dissolved Solids (TSS) (December 31, 2024, March 31, 2025, and June 30, 2025). Additional Areas of Concern The operator (Mr. Trotter) oversees this facility Casa Blanca WWTP (NM0030678) and Rio Puerco (NM0030686) on an individual employee basis full-time 24-hour per day 365 days per year. Additionally, he is responsible for sample collection and operation and maintenance (O&M) associated with both facilities. Lift Station WWTP#2 located approximately North and outside the fenced perimeter lacks secure perimeter fencing, alarms (either audible or flashing light) or signage. Lift Station-Burger King located within the restaurant drive-thru lacks ready access for servicing and/or routine maintenance. Section IV- RECOMMENDATIONS 1. Additional certified facility staff to assist in the day-to-day operations of both facilities and to address potential absence due to illness or personal time off (PTO) issues. EPA Region 6 inspector David Esparza conducted a closing conference at the Casa Blanca WWTP on September 17, 2025, for the inspection. Section IV - FOLLOW UP No additional information was received by EPA after exiting the Facility on September 17, 2025. 4 Laguna Development Corporation / Casa Blanca WWTP Permit No. NM0030678 Inspection Date 09/17/2025 Section V - LIST OF APPENDICES Appendix 1 - Review of the Integrated Compliance Information System (ICIS) Database for the period from January 1, 2022, to September 25, 2025 5 Laguna Development Corporation / Casa Blanca WWTP Permit No. NM0030678 Inspection Date 09/17/2025 Appendix 1 A Review of the Integrated Compliance Information System (ICIS) Database for the period from January 1, 2022, to September 25, 2025 NM0030678 CASA BLANCA WWTP Monitoring Period End Date 12/31/2022 02/29/2024 02/29/2024 02/29/2024 03/31/2024 03/31/2024 03/31/2024 05/31/2024 05/31/2024 12/31/2024 12/31/2024 03/31/2025 06/30/2025 Parameter Desc Enterococci E. coli E. coli Enterococci E. coli E. coli Enterococci E. coli Enterococci Solids, total dissolved Solids, total dissolved Solids, total dissolved Solids, total dissolved Statistical Base Short Desc 30DAVGEO 30DAVGEO DAILY MX 30DAVGEO 30DAVGEO DAILY MX 30DAVGEO DAILY MX 30DAVGEO DAILY MX DAILY MX DAILY MX DAILY MX Limit Unit Short Desc Limit Value CFU/10030. CFU/10047. CFU/10088. CFU/10030. CFU/10047. CFU/10088. CFU/10030. CFU/10088. CFU/10030. lb/d 792.3 mg/L 250. mg/L 250. mg/L 250. DMR Value 1210.3 114.4 185. 620.5 112.2 816.4 243. 199.3 49.1 806. 2300. 2100. 2300.