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11 <br />Table 4, continued <br />Sludge Loading Calculations <br />(E) Other Nutrient and Metals Loading Rates, Loading Limits, and Site Lifetime, <br />for an Example Field <br />Other Nutrient <br />= Content in sludge(mg/kg) x (100 -%sand) / 100 x 907(kg/ton) / 454000(mg/lb) <br />and Heavy <br />x Sludge loading rate(tons/acre) x (% Solids) / 100 <br />Metals Loadings <br />(lbs/acre) <br />Approximate <br />= Cumulative Loading Limit / Current Loading Rate <br />Site Lifetime, <br />Based on Current <br />Application Rate <br />Loading Limit Approx. <br />Criteria Site Life <br />Current Annual at Current <br />Loading Rate Annual Cumulative Rates <br />Constituent <br />bs/acre bs/acre bs/acre ears <br />Phosphorus <br />— 1,201 na na na <br />Potassium <br />— 64 na na na <br />Cadmium <br />— 0.07 0.45 17.8 265 <br />Copper <br />= 9 na 446 49 <br />Lead <br />— 1.46 1 na 714 490 <br />Nicket <br />= 0.85 na 179 211 <br />Zinc <br />= 28 na 893 32 <br />na = not applicable <br />