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COMMERCIAL COMPOSTING WATER QUALITY PERMIT DEVELOPMENT <br /> two periods are the greater level of precipitation in Period 1 and the differences in compost <br /> feedstock used for both periods. <br /> No pathogen discharge standards exist for compost leachate.Based on a comparison with <br /> the Willamette River Basin Water Quality Standards (OAR 340-041-0445)for bacteria in <br /> freshwaters and estuarine waters,one Fecal coliform sample from Period 1 and three Fecal <br /> coliform samples from Period 2 exceeded the 406 MPN/100mL value for E. Coli organisms. <br /> Although these standards are not directly applicable to Fecal coliform(E. Coli is a subset of <br /> Fecal coliform),it is clear that this compost leachate would require some treatment for <br /> pathogens. <br /> TABLE 2-4 <br /> Reported Concentrations of Pathogens in Food Waste Compost Leachate <br /> Turned Windrow Passively Aerated Windrow <br /> Salmonella Fecal coliform Salmonella Fecal coliform <br /> Date (MPN/100ml) (MPN/100ml) (MPN/100ml) (MPN/100mi) <br /> Period 1 (November to March Scenario) <br /> December 13,2001 <0.3 <0.3 <0.3 <0.3 <br /> (process week 2) <br /> December 27,2001 <0.3 4.3 <0.3 110 <br /> (process week 4) <br /> January 03,2002 <0.3 4.3 <0.3 46 <br /> (process week 5) <br /> January 10,2002 <0.3 2.3 <0.3 0.36 <br /> (process week 6) <br /> January 17,2002 <0.3 0.91 <0.3 290 <br /> (process week 7) <br /> January 24,2002 <0.3 24 <0.3 1,100 <br /> (process week 8) <br /> Period 2(March to June Scenario) <br /> March 28,2002 0.23 50,000 0.14 <0.02 <br /> (process week 2) <br /> April 11,2002 0.02 900 0.60 3 <br /> (process week 4) <br /> April 18,2002 <0.20 300 0.08 90 <br /> (process week 5) <br /> PDX/041320015.DOC g <br />