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• Second-, the City of Escalon Waste Water Treatment Facility. This facility is located approximately 1.5 miles southwest of the City of Escalon, on the north side of the Stanislaus River. The facility receives domestic effluent from the City of Escalon and industrial effluent from two food processors. Storm runoff is conveyed to the facility through the industrial pipeline. The domestic and industrial effluent are treated and disposed of in separate ponds. The City was required by the Regional Water Quality Control Board to submit a report that documented whether discharges to the ponds have caused, or are likely to cause, groundwater constituents to rise above background levels. Due to the highly heterorganic soil characteristic at the site, it was not determined if the location of the wells at the site are impacted by the force of the Stanislaus River-, thereby, influencing any downgradient wells. • Finally, Avena Drain, Lone Tree Creek and Johnny Creek. The Avena Drain runs on the south boundary of the property-, Lone Tree Creek runs approximately 1 mile south west of property; Little John Creek runs approximately 1 mile north of property. These resources of water travel from east to west and drain into the San Joaquin River. Impact to Underlying Groundwater and Downgradient Wells In all considerations to the groundwater, the conclusion from the soil samples demonstrate that the soil profile has layers of clay that have varying percentages of clay content, all being high, which will slow the penetration from surface water percolation down to the water table. This slowing of the percolation allows for a greater impact of drying periods. This dairy system will have a water storage volume that has a capacity greater than the requirements from both the county and state. These capacities will allow for containment of a full winter's manure volume, an above average winter rainfall plus a 25 year, 24 hour storm water volume. Considering these storage volumes, the manure effluent management system can be managed by plan, not managed by rainfall events. Well managed irrigation and return water flows, along with wet-dry cycles, will cause surface water not to penetrate the approximate 75 feet of the depth to static water table.' Although the presence of nitrate in the ground water indicate that there may be some agricultural contribution intrusion, _a",ut one of these values are well below the maximum contaminant level for drinking water established for nitrate of 45 mg/Liter (ppm). Furthermore, the consistent level of nitrate in the ground water indicates that the nitrate in these waters is more a result of a regional infiltration into the water table, rather than contribution from the any localized source. It is con tided that the proposed dairy expansion will not impact the downgradient ground water if proper manure effluent management is followed. Refer to page 30 for Endnotes and Reference Sources Soil Suitability Study Property Name and Address: Frank Faha Dairy, Inc., 12182 S. Robinson Road, Escalon,CA 95320 Page 27 Western Design/David Avila 2001