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i <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/OC Report <br /> i <br /> Client- EMCON Associates Date Received 01/22/93 <br /> Project EMCON Project No OG71-029 01 Service Request No SJ93-0096 <br /> ARCO Facility No 2130 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Nanograms <br /> Date Analyzed 02/01/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Anal Value Result Recovery Criteria <br /> Benzene 250 238 95 85-115 <br /> Toluene 250 247 99 85-115 <br /> Ethylbenzene 250 238 95 85-115 <br /> Total Xylenes 750 719 96 85-115 <br /> TPH as Gasoline 2,500 2,279 91 90-110 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by ` tr Date f <br />