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COLUMBIA ANALYTICAL SERVICES. INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 04/07/93 <br /> Project- EMCON Project No OG71-029 01 Service Request No SJ93-0472 <br /> ARCO Facility No 2130 Sample Matnx Water <br /> STEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LOFT Method <br /> pg/L (ppb! <br /> Sample Name MW-4 (74) MW-5 176) MW-61731 <br /> Date Analyzed 04/14/93 04115/93 04115193 <br /> Analy,te MAL <br /> Benzene 0 5 250 260 0 6 <br /> Toluene 0 5 26 150 ND <br /> Ethylbenzene 0 5 <2 5 12 ND <br /> Total Xylenes 0 5 120 230 ND <br /> TPH as Gasoline 50 1,000 1,600 160 <br /> TPH Total Petroleum Hydrocaroons <br /> MRL Method Reporting Limit <br /> NO None Detected at or above the method reporting limit <br /> ' Raised MRL due to high analyte concentration requiring sample dilution <br /> Approved by- Date 4-,�1 -q3 <br /> 3 <br />