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INFORMATION SHEET SAN JOAQUIN COUNTY SERVICE AREA 31 AMADOR CORPORATION CALIFORNIA STOP WASTEWATER FACILITY SAN JOAQUIN COUNTY The San Joaquin County Service Area 31 has been formed to provide wastewater treatment and disposal services to the California STOP development, on the east side of the intersection of Interstate 5 and State Highway 12 in San Joaquin County. The property on which the treatment plant will be constructed is owned by Amador Corporation, the developer of the property. Although the location of the development is near the White Slough Water Pollution Control Facility, sewerage service could not be provided. Therefore, a package plant was proposed to treat the estimated 0.25 MGD flows, and to discharge effluent to Highline Canal, which is used directly to recharge wetlands and irrigate agricultural land. The City of Lodi's plant (recently expanded to treat up to 8.5 MGD) discharges at approximately the same location where Highline Canal enters Dredger Cut. Due to tidal action, Lodi effluent may make up a significant percentage of the water in Highline Canal. In order to minimize any water quality impacts from its wastewater discharge, the Discharger proposes to build treatment facilities to meet 10 mg/l each for BOD and suspended solids, and 3 mg/l for ammonia (as N). Due to its location at the upstream end of Highline Canal, there was no appropriate upstream receiving water sampling location. Therefore, sampling has been limited to effluent and a downstream sampling location. The City of Lodi currently samples water further downstream in Highline Canal, as well as locations in Dredger Cut, White Slough, and Bishop Cut. Water Quality Objectives, adopted pursuant to the Enclosed Bays and Estuaries Plan and the Inland Surface Waters Plan, are applicable to the discharge. Therefore, once the facility is constructed, effluent samples will be analyzed for compliance with appropriate objectives. If the effluent is not in compliance, the Board may reopen the permit to require additional actions. Sludge is proposed to be dried on sand beds and hauled to a landfill for disposal. The Discharger is required to submit a sludge disposal plan within 60 days of initiating the discharge. Finally, the Discharger is required to conduct an effluent toxicity monitoring program to estimate if the discharge produces instream chronic toxicity. The Discharger is required to investigate and correct any toxicity problems which occur. PHL:pl