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COMMERCIAL COMPOSTING WATER QUALITY PERMIT DEVELOPMENT <br /> TABLE 2-5 <br /> Reported Concentrations of Nutrients in Runoff <br /> Total Ammonia- Nitrate-Nitrogen Total Ortho-Phosphorus <br /> Compost Nitrogen (N) Nitrogen(NH4-N) (NO3-N) Phosphorus (P) (Ortho-P) <br /> Feedstock (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) <br /> Type <br /> Yard Debrisa NA 9.6 6.6 NA NA <br /> Food waste NA 0.43-9.4 0-0.28 NA 0.05-0.33 <br /> Manure` NA 2.1-37 0.11-6.7 NA 7.37-27.8 <br /> Manure 100 NA NA 50 NA <br /> Notes: <br /> a.The site was on a sloped clay pad. No specific mention of additional BMPs.(Governo et.al,October 2003) <br /> b.The site was on a sloped soil pad. No specific mention of additional BMPs.(Governo et.al,October 2003) <br /> c.The site was on a geomembrane. No specific mention of additional BMPs. (Governo et.al,October 2003) <br /> d.The site was located over gravel and plastic. No specific mention of additional BMPs. (Governo et.al,October <br /> 2003) <br /> NA=not available <br /> In addition to nutrients,runoff can also contain a variety of other constituents.Table 2-6 <br /> shows the range of concentrations that were detected from the runoff of four different types <br /> of facilities(a large yard debris and food waste composter,a medium yard debris facility,a <br /> manure and brush facility,and a manure facility).These concentrations are compared to <br /> benchmarks for the 1200-Z and 1200-COLS permits.For many of the constituents,no <br /> benchmark exists. All constituents that have benchmark values, exceeded at least one of the <br /> standards.Most of these constituents are present in the runoff at concentrations that could <br /> potentially degrade water quality if they were allowed to migrate offsite. <br /> PDX/041320015.DOC <br /> 11 <br />