Document Lg5QDZOEDqMnGZ0EDBvQrV907
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United States
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Region 6 Compliance Assurance and Enforcement Division
INSPECTION REPORT
Inspection Date(s): Media : Regulatory Program(s)
April 26, 2017 Water CWA 308[A][B]
Company Name: Facility Name: Facility Physical Location:
(city, state, zip code) Mailing address :
(city, state, zip code) County/Parish: Facility Contact:
Village of Chama
Chama Wastewater Treatment Plant
0.5 Miles West of US 84/64 and NM 17
Chama, New Mexico 87520
P.O. Box 794
Chama, New Mexico 87520
Rio Arriba Levi Sandoval
I Wastewater Plant Operator
505 .929.2939
FRS Number: Identification/Permit Number: Media Number: NAICS: SIC:
110009831174 NM0027731 NA 221320 4952
Personnel participating in inspection:
David Long
USEPA/6EN -W M
Amy Matthews
USEPA/6EN-WM
Ron Russom
RonR@Villageofchama .o rg
Environmental Scientist Environmental Engineer Mayor
214.665.7323 214.907.0638 575 .756 .2 184 ext. 221
EPA Lead Inspector Signature/Date
Supervisor Signature/Date
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{Supervisor name}
6ENFORM-019-R7 {2/15/2017)
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Date
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Date
Village of Chama Wastewater Treatment Facility 04/26/2017
Section I - INTRODUCTION
PURPOSE OF THE INSPECTION
A U.S. Environmental Protection Agency (USEPA) compliance evaluation inspection was performed at the Village of Chama Wastewater Treatment Plant located near the intersection US 84/64 and NM 17, Chama, New Mexico on April26, 2017. The inspection was conducted under the guidelines established by the USEPA under the National Pollutant Discharge Elimination System (NPDES) for wastewater treatment systems. This targeted site visit was performed as a part of the USEPA Region 6's annual ACS inspection commitment and its' purpose was to inspect and review current operations as compared to their NPDES permit requirements. An entry briefing was conducted by EPA-Region 6 inspectors David Long and Amy Andrews at 9:00a.m. and the inspector met with Levi Sandoval, Plant Operator who was present for the plant inspection. Following the plant inspection, the EPA inspectors were escorted to the Village of Chama City Hall where a review of the facility's laboratory and DMR data was reviewed. At the conclusion of the inspection, the EPA inspectors met with Mr. Ron Rossum, the Mayor of the Village of Chama for an exit interview. During the entry and exit briefings, the EPA inspectors provided credentials and explained the purpose ofthe inspection.
FACILITY DESCRIPTION
The facility is owned by the Village of Chama and operates under NPDES permit NM0027731 (effective November 1, 2011 to October 31, 2016 and has been administratively continued to date). The Village of Chama WWTP is a minor municipal discharger with a design flow of 0.3 million gallons a day (MGD) and average daily flow of 0.08 MGD. The discharge from the WWTP is to Rio Cham ita and eventually to the Rio Grande River Basin. The Village of Chama facility is in operation 24 hours each day and seven days per week with operators on site from 8:00a.m. to 5:00p.m. Monday through Friday. Operators are oncall for evenings and weekends, however the facility lacks a Supervisory Control and Data Acquisition (SCADA) system to provide 24/7 monitoring of plant operations.
Treatment units associated with this facility currently include four lift station (all have backup generators) which feeds the influent to a grinder pump which sends influent through a three-quarter inch bar screen. From the bar screen, flow is sent to two aerated concrete lined lagoons in series (originally designed to operate in parallel, but changed to series operation to increase retention time). Effluent from the lagoons is sent to a chorine contact chamber followed by de-chlorination with sulfur dioxide. Final discharge flow rate is monitored by a Greyline OCF 4.0 flow meter. The facility also maintains a 60 degree V-Notch weir as a primary flow measurement device. Review of past DMR data showed continuous violation of their permit limits for all parameters and raises questions regarding efficacy of their treatment system or its' maintenance.
During the entry briefing, the EPA inspectors were informed by Mr. Sandoval that the Village of Chama had received an $8.2 million dollar grant from the State of New Mexico to build a treatment plant that would be operational by November 2017. The new plant would include new headworks with grit removal and improved bar screens. From the headworks, influent would be directed to a racetrack
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