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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Cllcnt - ERCO Products Compatn SetI ice Request L9604797 <br /> Project IM STOCKTON/920805-1 I4 006/TO#18957 00 Date. Collected NA <br /> LCS Mati n -qtr Date Received NA <br /> Date. Extracted NA <br /> Date Analyzed 12/6196 <br /> Ltbor.iton,Control Sample Sununary <br /> BTE\ Ind Total Volatile Hvdrocarbons <br /> EPA Methods 8020/Modified 8015 <br /> [hits uLIL (ppmv) <br /> CAS <br /> Percent <br /> Recovcry <br /> fI uc Percent ACLeptancc <br /> -kn.i1Ntc Valise Re%ult RuoNcry Limits <br /> Bln/Cnt, l u u 7 7.1 77 60-140 <br /> Toll[L]IC 10 u 5 58 S6 60-140 <br /> E1h%1bcn/enc 10 n S 96 90 60-140 <br /> TPH,ia G.1501111L 710 649 91 60-1.10 <br /> * rPH IN Isolinc, a defined,is CSF (Benzene) through C12 (Dodecane) and tiscs .i molecular uetght <br /> of 100 to Ld1LLI1 [tc tlic I}pn[t <br /> w <br /> Page 7 <br />