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COLUMBIA ANALYTICAL SERVICES. INC <br /> QA/QC Report <br /> Client- EMCON Associates Date Received 09/02/93 <br /> Project: EMCON Project No OG71-038 01 Service Request No SJ93-1101 <br /> ARCO Facility No 2168 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> u9/L (ppb) <br /> Date Analyzed 09/14/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Ana! Valise Result Recovery Criteria <br /> Benzene 25 27 2 109 85-115 <br /> • Toluene 25 270 108 85-115 <br /> Ethylbenzene 25 27 1 108 85-115 <br /> Total Xylenes 75 81 8 109 85-115 <br /> TPH as Gasoline 250 248 99 90-110 <br /> Approved by l l Date f'jl '7o <br /> X014 O.n�...n...a A ..... C - 1 �_ �� - "Q 12 <br />