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INFORMATION SHEET ORDER NO. 5-01-251 CITY OF LATHROP AND CROSSROADS CREA LLC WASTEWATER TREATMENT FACILITY NO. 1 (CROSSROADS) LATHROP, SAN JOAQUIN COUNTY Background The City of Lathrop operates a wastewater treatment facility at 19094 Howland Avenue, Lathrop, San Joaquin County. The Discharger owns the treatment plant site and storage ponds (12.2 acres). Crossroads CREA LLC owns the proposed land application areas (43.8 acres). The treatment facility currently receives industrial and domestic wastewater generated in the Crossroad Commerce Center. Wastewater treatment processes include influent pumping,mechanical screening, grit and grease removal, extended aeration, and clarification. Effluent is currently discharged to three 2.4 acre evaporation/percolation ponds for disposal. The Discharger is proposing to increase the storage capacity of the existing storage ponds, line the storage ponds and develop 43.8 acres as land application areas. Previous waste discharge requirements for the Discharger's treatment and disposal facility were contained in Order No. 94-198 issued to City of Lathrop and Crossroads Sanitary Corporation. Prior to that, Order No. 92-232 regulated the Discharger. Order No. 92-232 has been rescinded; Order No. 94- 198 will be rescinded upon adoption of this Order. This Order combines requirements for wastewater treatment and agronomic application of treated wastewater to cropped land application areas. The average dry weather flow to the wastewater treatment plant is currently 70,000 gallons per day (gpd). The treatment system improvements, including the addition of the land application areas, allows a flow limit of 250,000 gpd. Biosolids Disposal Solids collected from the mechanical screens, grit, and grease removal processes are hauled to a local landfill for disposal. Waste activated sludge is dewatered by a polymer bag process or dried on concrete lined sludge drying beds, and disposed at a permitted landfill. Effluent Disposal The Discharger will land apply treated wastewater to the newly developed land application areas at agronomic rates. Wastewater will not be applied during rain events or when the soil is saturated. The storage ponds have been sized to store wastewater during the winter months. Water will be applied by flood or sprinkler irrigation to irrigate crops at agronomic rates consistent with both the nutrient content of the effluent and the water needs of the crops. Livestock will not be placed on the land application areas nor will crops grown on the application areas be used to feed milking animals for human consumption.