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0 • <br /> Present effluent quality: Secondary effluent <br /> Present disposal method: A land disposal system consisting of <br /> several effluent diversion structures, three low-lift pumps , one <br /> surge tank, a storage reservoir, irrigation piping and 344 acres <br /> of disposal fields. Flood irrigation is used. <br /> Present receiving water quality: Most of the effluent is disposed <br /> of to land; the only time the effluent is discharged to the San <br /> Joaquin River is in the winter when the river is carrying rain <br /> and snow runoff and the quality of the water is good. <br /> PROPOSED PROJECT <br /> PROJECT DESCRIPTION: Phase II will modify the existing plant as <br /> follows: <br /> 1. Add one primary sedimentation tank; <br /> 2. Add one aeration basin and blower; <br /> 3. Add one- secondary clarifier; <br /> 4. Add one return sludge pump; and <br /> 5 . Add four sludge drying beds. <br /> These improvements will allow the Manteca plant to accept the <br /> increased flows of wastewater from the existing service area and <br /> allow an expansion of the service area. The improvements will be <br /> constructed by an amendment to an existing Clean Water Grant , <br /> C-06-2017. <br /> Disposal Methods: <br /> Wastewater: Land disposal and, on an as-needed basis , <br /> discharge to the San Joaquin River <br /> Sludge: Land disposal <br /> Population basis for capacity determinations: <br /> Manteca Lathrop <br /> Phase I: 46 ,268 Year: 1994 7 ,070 Year: 2004 <br /> Phase II: 63 ,700 Year: 2007 12 ,300 Year: 2007 <br /> Design Capacity: Total plant design capacity including Phase II: <br /> Manteca Lathrop <br /> Residential and Commercial: 5 . 13 mgd ADWF 1.02 mgd ADWF <br /> Industrial: 0. 80 mgd ADWF -0- <br /> Total for Lathrop and Manteca: 6. 95 mgd ADWF <br /> (Per Capita flow used in calculations: 83 gpd) <br /> 7 <br />