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i <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 08/04/93 <br /> Project EMCON Project No OG71-029 01 Service Request No SJ93-0960 <br /> ARCO Facility No 2130 Sample Matrix Water <br /> I <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> uglL (ppb) <br /> Sample Name MW-1 (731 MW-2 (72) MW-3 (73) <br /> Date Analyzed 08/10/93 08/11/93 08/10/93 <br /> I Analyte MRL <br /> Benzene 0 5 390 35 1 5 <br /> Toluene 0 5 130 2 6 ND <br /> Ethylbenzene 0 5 38 30 ND <br /> Total Xylenes 0 5 79 15 ND <br /> 1• TPH as Gasoline 50 2,100 1 200 89 <br /> Sample Name MW-4 (74) MW-5 (76) MW-5 (76) <br /> Date Analyzed 08/10/93 ** 08/12/93 08/12/93 <br /> 1 <br /> Analyte MRL <br /> Benzene 0 5 220 160 80 <br /> Toluene 0 5 50 88 40 <br /> 1 Ethyibenzene 0 5 4 5 19 9 9 <br /> Total Xylenes 0 5 68 71 34 <br /> TPH as Gasoline 50 880 790 390 <br /> 1 <br /> " This sample had significant bottle to bottle variation The concentration values of both bottles are <br /> reported <br /> This sample was part of the analytical batch started on August 10, 1993 However, it was <br /> analyzed after midnight so the actual date analyzed is August 1 1 , 1993 <br /> 1 <br /> Approved by Date <br /> 3 <br />