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her Nutrient = Content in sludge(mg/kg) x (100 -%sand) / 100 x 907(kg/ton) / 454000(mg/lb) <br />and Heavy x Sludge loading rate(tons/acre) x (% Solids) / 100 <br />Metals Loadings <br />(lbs/acre) <br />Cumulative Loading Limit / Current Loading Rate <br />Site Lifetime, <br />Based on Current <br />Application Rate <br />Constituent <br />Table 4, Preapplication Report (continued) <br />Loading Limit <br />Criteria <br />Annual Cumulative <br />Sludge Loading Calculations <br />(D) Sludge/Sand Mix <br />Loading Limits for an Example Field <br />Alfalfa N Demand <br />= 375 lbs/acre <br />Truck and Trailer <br />= 40000 lbs/toad = 20 tons/load (wet basis) <br />Potassium = <br />= 38 cubic yards/load <br />Field Size <br />= 80 acres <br />Per -acre Loading <br />0.10 <br />Rate for Sludge - <br />175 <br />Sand Mix <br />= N Demand of Crop / Available N Concentration in Sludge -Sand Mix <br />na 446 <br />= 13.9 moist tons/acre <br />... in truckloads <br />= Loading in (moist tons/acre) / (tons of sludge -sand mix/truckload) <br />na 714 <br />= 0.7 truckloads/acre <br />her Nutrient = Content in sludge(mg/kg) x (100 -%sand) / 100 x 907(kg/ton) / 454000(mg/lb) <br />and Heavy x Sludge loading rate(tons/acre) x (% Solids) / 100 <br />Metals Loadings <br />(lbs/acre) <br />Cumulative Loading Limit / Current Loading Rate <br />Site Lifetime, <br />Based on Current <br />Application Rate <br />Constituent <br />Current Annual <br />Loading Rate <br />Loading Limit <br />Criteria <br />Annual Cumulative <br />Approx. <br />Site Life <br />at Current <br />Rates <br />(lbs/acre) (lbs/acre) (lbs/acre) <br />(years) <br />Phosphorus = <br />443 <br />na na <br />na <br />Potassium = <br />85 <br />na na <br />na <br />Cadmium = <br />0.10 <br />0.45 17.8 <br />175 <br />Copper = <br />8 <br />na 446 <br />56 <br />Lead = <br />1.29 <br />na 714 <br />551 <br />Nickel = <br />1.30 <br />na 179 <br />137 <br />Zinc = <br />30 <br />na 893 <br />30 <br />= not <br />Telephone 209/836-1650 3900 Holly Drive Tracy, California 95376 <br />