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MANTECA SEWAGE -2- 28 February 1985 TREATMENT PLANT, SAN JOAQUIN COUNTY Deputy Public Works Director for the City. At that time I requested him to submit a report describing how the additional land would be used, what additional capacity it afforded, and how -the City proposed to handle sewage from on-going and proposed residential building. I stated that we are concerned about further building in Manteca and expect the City to utilize new disposal land to alleviate the existing problem rather than as additional capacity for new connections. Samples were collected from field #2 , the drainage ditch adjacent to field #2 , the pond, the drainage ditch upstream and downstream of the outlet culvert from the pond , the furthest downstream point of the drainage ditch just before it exits the plant property , and the drainage ditch upstream of the plant at its intersection with Airport Road (background) . These samples are presently being analyzed by Anlab. During the inspection , effluent was observed being applied to field #9A. The effluent looked and smelled like raw sewage . After taking Mr . Negley back to his office , Ken Landau and I visited the sewage treatment plant itself for a brief inspection. The plant is designed for secondary treatment utilizing screen- ing, grit removal , contact stabilization , and clarification. Since the plant is at or above capacity at present, it affords little treatment as evidenced by the clarifier influent and effluent appearing indistinguishable from one another. All sludge removed from the wastewater is mixed back with the effluent prior to spreading on the fields. CONCLUSIONS: Manteca is in violation of Provision 5 of its Waste Discharge Requirements, Resolution No. 70-134 , which states: "There shall be no direct discharge to any surface water course that discharges to waters of the State or land owned by others than the City of Manteca. " Manteca is in threatened violation of the portion of the require- ments which states: " . . . the discharger shall report promptly to the California Regional water Quality Control Board, Central valley Region, any material change in the waste discharge or change in the conditions associated with its disposal . "