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INFORMATION SHEET LIINNE ESTATES, LLC LINNE ESTATES WASTEWATER TREATMENT SYSTEM SAN JOAQUIN COUNTY Background Linne Estates is a proposed 78-acre residential subdivision that will contain 150 residential parcels. Linne Estates, LLC (hereafter Discharger) has proposed a new wastewater treatment system to treat and dispose of domestic wastewater generated by homes in the proposed residential development. Once constructed, the facility will be owned and operated by the San Joaquin County Department of Public Works. The facility will be at 7701 Nates Road, Tracy. Wastewater will be collected in a gravity collection system with two pumping stations. Piping will be gasketed to minimize leakage and infiltration. The wastewater treatment system is sized for a flow rate of 55,000 gpd. Wastewater treatment will be performed using activated sludge in a batch treatment process. Wastewater will be partially denitrified, disinfected, and discharged to shallow emitters in a 1.7 acre dispersal area subdivided into six irrigation zones. Discharge of wastewater will be controlled using moisture sensors in the dispersal area to prevent soil saturation and even distribution. Wasted sludge will be discharged to an aerobic digestion tank and pumped periodically for off-site disposal at the City of Tracy's wastewater treatment facility. This Order requires the Discharger to prepare an As-Built Report, an Operation and Maintenance Plan, a Collection System O&M/Spill Response Plan, a Groundwater Well Installation Workplan, a Groundwater Well Installation Report, and a Groundwater Quality Study Report. Basin Plan, Beneficial Uses, and Regulatory Considerations Surface water drainage from the site is to the San Joaquin Delta. The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, Fourth Edition (Basin Plan), designates beneficial uses, establishes water quality objectives, and contains implementation plans and policies to achieve the objectives for all waters of the Basin. Beneficial use designations determine the water quality objectives that apply to a water body. For example,pursuant to the Chemical Constituents objective, waters designated as municipal and domestic supply must meet the maximum contaminant levels (MCLs) for drinking water. The Basin Plan sets forth the applicable beneficial uses (industrial process, industrial service, agricultural, and municipal and domestic supply in this instance) of groundwater, procedure for application of water quality objectives, and the process for and factors to consider in allocating waste assimilation capacity. Antidegradation Policy (State Board Resolution No. 68-16) State Board Resolution No. 68-16 ("Statement of Policy with Respect to Maintaining High Quality of Waters of the State")requires the Regional Board in regulating the discharge of waste to maintain high quality waters of the state until it is demonstrated that any change in quality will be consistent with maximum benefit to the people of the State,will not unreasonably affect beneficial uses, and will not result in water quality less than that described in the Regional Board's policies (e.g., quality that does not conform to water quality objectives). In addition, Resolution No. 68-16 requires that discharges of waste to existing high quality waters "be required to meet waste discharge requirements which will result in the best practicable treatment or control of the discharge necessary to assure that(a) pollution