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Table 2.3 <br /> Maximum Acceptable Metal Concentrations <br /> Constituent Concentration (mg/kg) <br /> on Dry-Weight Basis <br /> Arsenic (As) 41 <br /> Cadmium (Cd) 39 <br /> Chromium (Cr) 1,200 <br /> Copper(Cu) 1,500 <br /> Lead (Pb) 300 <br /> Mercury (Hg) 17 <br /> Nickel (Ni) 420 <br /> Selenium (Se) 36 <br /> Zinc (Zn) 2,800 <br /> Pathogen Reduction. In accordance with 14 CCR, Section 17868.3 (Pathogen Reduction), <br /> the density of fecal coliform in the stabilized compost, that is or has at one time been <br /> active compost, will be less than 1,000 most probable number (MPN) per gram of total <br /> solids on a dry weight basis, or the density of salmonella bacteria in the stabilized compost <br /> will be less than 3 MPN per 4 grams of total solids on a dry weight basis. <br /> To ensure pathogen reduction for the windrow composting process, the active compost <br /> will be maintained under aerobic conditions at a temperature of 131'F or higher for a <br /> period of 15 days or longer. During the period when the compost is maintained at 131°F or <br /> higher, there will be a minimum of five turnings of the windrow. <br /> Compost facilities shall be operated at the minimum temperature and process time <br /> requirements for pathogen reduction as presented in Table 2.4 and as specified in 14 <br /> CCR, Section 17868.3. <br /> Table 2.4 <br /> Minimum Temperature and Process Time <br /> Requirements for Pathogen Reduction <br /> Facility Minimum Minimum <br /> Temperature (°F) Duration (Days) <br /> Enclosed or within-vessel 131° 3 <br /> Windrow' 1310 15 <br /> Aerated Static Pile 1310 3 <br /> 1Must maintain aerobic conditions and be turned at least five times. <br /> 2A 6-to 12-inch cover(insulated material) is required. This method is not <br /> proposed at this time. <br /> Forward Composting Facility RCSI <br /> 7/20/09;Page 24 SWT Engineering <br />