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COLUMBIA ANALYTICAL SERVICES INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 08/06/93 <br /> Project EMCON Project No OG71-019 01 Service Request No SJ93-0977 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DNS LUFT Method <br /> N9/L (ppb) <br /> Sample Name E-10 1221 E-11 (22) K11112 <br /> Date Analyzed 08/16/93 08/16/93 08/16/93 <br /> Analyte MRL <br /> Benzene 0 5 3,300 540 0 6 <br /> Toluene 0 5 630 < 130 ND <br /> Ethylbenzene 0 5 1,700 200 1 6 <br /> Total Xylenes 0 5 5,700 550 2 2 <br /> TPH as Gasoline 50 32,000 54,000 830 <br /> Sample Name Method Blank Method Blank <br /> Date Analyzed 08/16/93 08/17/93 <br /> Analyte MRL <br /> Benzene 0 5 ND ND <br /> Toluene 0 5 ND ND <br /> Ethylbenzene 0 5 ND ND <br /> Total Xylenes 0 5 ND ND <br /> TPH as Gasoline 50 ND ND <br /> Rased MRL due to matrix interference <br /> Approved by i4- Hll I 1� <br /> Date <br /> ., 5 <br />