Laserfiche WebLink
MONITORING AND REPORTING REQUIREMENTS WQ 2014-0153-DWQ-R5356 - 2 - <br /> STOCKTON VERDE MHP, LLC <br /> STOCKTON VERDE MHP WWTF <br /> SAN JOAQUIN COUNTY <br /> while providing the anoxic bioreactors with highly concentrated nitrified mixed liquor <br /> (ML). A portion of this ML is waste activated sludge (WAS) and a portion will be <br /> recycled back to the anoxic basin. The wastewater will be disinfected with a UV system <br /> and then pumped directly to the discharge point for subsurface disposal. <br /> Effluent concentrations of treated wastewater are 2 mg/L of BOD; 1 mg/L of TSS; non- <br /> detect for nitrate; and 2.1 mg/I for total nitrogen. <br /> GROUNDWATER CONCERNS <br /> Treated wastewater is discharged to 40 dry wells, constructed to 18 feet deep and filled <br /> with gravel. Groundwater is the area is approximately 72 to 74 feet below ground <br /> surface. Based on shallow groundwater data collected from the adjacent MHP , <br /> groundwater is considered poor quality with respect to nitrate (concentrations are <br /> greater than 10 mg/L). <br /> MONITORING REQUIREMENTS <br /> Monitoring requirements included in the following sections from Attachment C of the <br /> General Order are appropriate for this discharge and include Aerobic Treatment Unit <br /> Monitoring; Activated Sludge Monitoring, Influent and Effluent Monitoring, Disinfection <br /> System Monitoring, and Solids Disposal Monitoring. <br /> SALT AND NITRATE CONTROL PROGRAMS <br /> The Central Valley Water Board adopted Basin Plan amendments incorporating new <br /> programs for addressing ongoing salt and nitrate accumulation in the Central Valley at <br /> its 31 May 2018 Board Meeting. The Basin Plan amendments were conditionally <br /> approved by the State Water Board on 16 October 2019 (Resolution 2019-0057) and by <br /> the Office of Administrative Law on 15 January 2020 (OAL Matter No. 2019-1203-03). <br /> For nitrate, dischargers that are unable to comply with stringent nitrate requirements will <br /> be required to take on alternate compliance approaches that involve providing <br /> replacement drinking water to persons whose drinking water is affected by nitrates. <br /> Dischargers may comply with the new nitrate program either individually or collectively <br /> with other dischargers. For the Nitrate Control Program, the facility falls within Non- <br /> Prioritized Groundwater Basins. Notices to Comply for Non-Prioritized Basins will be <br /> issued within two to four years after the effective date of the Nitrate Control Program. <br /> For salinity, dischargers that are unable to comply with stringent salinity requirements <br /> will instead need to meet performance-based requirements and participate in a basin- <br /> wide effort to develop a long-term salinity strategy for the Central Valley. Dischargers <br /> received a Notice to Comply with instructions and obligations for the Salt Control <br /> Program within one year of 17 January 2020, the effective date of the amendments. <br /> Upon receipt of the Notice to Comply, the discharger had no more than six months to <br />