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COMMERCIAL COMPOSTING WATER QUALITY PERMIT DEVELOPMENT <br /> benchmarks. Based on these data, the 1200-Z benchmarks are frequently exceeded for TSS <br /> and E. Coli.The 1200-COLS benchmarks are frequently exceeded for TSS,copper, lead,zinc, <br /> E. Coli, total phosphorus, and BOD. <br /> TABLE 2-7 <br /> Stormwater Data from an Oregon Green Compost Feedstock Facility <br /> Date pH TSS O&G Copper Lead Zinc E.Coli Total P BODS <br /> Sampled (S.U) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (counts/100mL) (mg/L) (mg/L) <br /> December 13,2000 8.2 34 3.6 0.023 0.022 0.050 NT NT 39 <br /> November 28,2001 6.5 650 ND 0.056 0.14 0.39 400,000 4.6 120 <br /> December 13,2001 8 240 5.9 0.065 0.21 0.39 960 0.76 5.0 <br /> December 13,2001 6.5 260 4.9 0.072 0.40 0.38 960 1.0 940 <br /> March 19,2002 8.0 18 ND ND 0.030 ND 12 0.99 4.0 <br /> March 19,2002 6.6 530 4.9 0.097 0.31 0.42 >2,400 1.3 18 <br /> December 11,2002 6.7 500 ND 0.058 0.02 0.47 >16,000 0.57 67 <br /> March 6,2003 7.2 520 ND 0.062 0.15 0.34 >16,000 2.1 32 <br /> April 23,2003 5.3 5,000 23 0.450 0.53 2.4 >240,000 250.00 250 <br /> 1200-COLS 6.5-8.5 50 10 0.036 0.006 0.24 406 0.16 33 <br /> Benchmarks <br /> 1200-Z 5.9-9.0 130 10 0.1 0.4 0.6 406 N/A N/A <br /> Benchmarks <br /> Notes:This green compost feedstock facility takes in the following compost feedstocks:uncompacted and compacted yard <br /> debris and wood waste(no manure).They employ catch basin filters and frequent machine sweeping of impervious surfaces <br /> to reduce sediment runoff. <br /> Source of data: (Oregon DEQ, 2004) <br /> TSS=Total Suspended Solids <br /> O&G=Oil and Grease <br /> P=Phosphorus <br /> BOD5=Biochemical Oxygen Demand <br /> ND=Not Detected <br /> NT=Not Tested <br /> NIA=Not Applicable <br /> 2.4 Summary <br /> Compost potentially contains a variety of pollutants,from organic material/debris and <br /> nutrients to metals and pathogens (depending on the type of compost feedstocks and the <br /> compost method used). Compost leachate,runoff, and stormwater potentially have high <br /> concentrations of nutrients,metals,salts,organic constituents, and pathogens.Without <br /> proper controls,these constituents can migrate into the environment and potentially affect <br /> human health and the environment.New design criteria,definitions of compost feedstock <br /> types,BMPs, and benchmarks are needed to address this potential issue. <br /> PDX/041320015.000 13 <br />