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Exhibit A - Biosolids Quality Standards <br />MAXIMUM CONCENTRATION OF CONTAMINANTS FOR TOXICITY CHARACTERISTIC <br />RegulatoryLevel <br />Contaminant <br />(mom) <br />Arsenic <br />5.0 <br />Barium <br />100.0 <br />Benzene <br />0.5 <br />Cadmium <br />1.0 <br />Carbon tetrachloride <br />0.5 <br />Chlordene <br />0.03 <br />CNorobenzene <br />100.0 <br />Chloroform <br />6.0 <br />Chromium <br />5.0 <br />o -Cresol <br />200.0' <br />m -Cresol <br />200,0' <br />cesol 1 <br />200.' <br />200.00 <br />2,4-0 <br />10.0 <br />1,4-Dic hlorobenzens <br />7.5 <br />1,24)ic hloroethene <br />0.5 <br />1,1-Qichioroethylene <br />0.7 <br />2,4-Dinitrotoluene <br />0.132 <br />Endrin <br />0.02 <br />Heptachlor (and its hydroxide) <br />0.008 <br />Hexachtorobenzene <br />0.132 <br />Hexachforo-1,3-butadiene <br />0.5 <br />Hexachloroethane <br />3.0 <br />Lead <br />5.0 <br />Lindane <br />0.4 <br />Mercury <br />0.2 <br />Methoxychlor <br />10.0 <br />Methyl ethyl ketone <br />200.0 <br />Nitrobenzene <br />2.0 <br />Pantachlorophenol <br />100.0 <br />Pyridine <br />W <br />Selenium <br />1.0 <br />Silver <br />5.0 <br />Tetrad toroethylene <br />0.7 <br />Toxaphene <br />0.5 <br />TrlcMoroethylene <br />0.5 <br />2.4,5-Tachicrophenol <br />400.0 <br />2.4,13 -Trichlorophenol <br />2.g <br />2,4,5 -TP (SlIvex) <br />.t 0 <br />Vinyl chloride <br />0.2 <br />tt o-, m-, and P -crew concentrations cannot be <br />erentlated, the total cresol (17026) concentration Is used. The <br />regulatory level of total cresol Is 200 mg/L. <br />20uantitation limit Is greater than the calculated regulatory level. The quantitation limit therefore becomes the <br />regulatory level. <br />Page 8 of 8 <br />C \Users\SPenmsc4lppDataUZWMictusoR\Windows\Temporary Intena Fars\Contac.0utlook\FKDOSD7G\BiosoGds Disposal Ageameac <br />tRC July 20I9.doca <br />219 <br />