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TABLE 1 <br /> SUMMARY OF HISTORICAL SLUDGE PRODUCTION DATA <br /> City of Manteca <br /> Year Avg. Sludge Production$ Land Unit <br /> Flow Dry Weight Used Load <br /> (mgd) (lbs) (tons) (acres) (lbs/ac) <br /> 1984 2.81 1,710,784 855 210 8,147 <br /> 1985 3.13 1,905,607 953 210 9,074 <br /> 1986 3.45 2,100,429 1,050 210 10,002 <br /> 1987 3.59 2,185,664 1,093 210 10,408 <br /> 1988 3.55 2,161,311 1,080 210 10,292 <br /> 1989 4.18 1,272,434 630 210 6,059c <br /> 1990 4.46 1,357,669 679 210 6,465 <br /> (a) Sludge production for 1984 through 1988 was calculated using influent flows and total <br /> suspended solids (TSS) concentration of 200 mg/L. <br /> (b) 1989 and 1990 sludge production was refined assuming a combined 50 percent volatile <br /> solids reduction in the digester and the sludge drying bed. <br /> (c) Equivalent load applied over 210 acres. Actual land use in 1989 and 1990 was 98 acres <br /> and 68 acres, respectively. This corresponds to 1989 and 1990 actual loading rates of <br /> 12,9841bs/acre and 19,966 lbs/acre, respectively. <br />