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1 <br />F! Lancaster, <br />Laboratories <br />r, Page I of I <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 856729 <br />Reported: 06/25/03 at 01:46 PM <br />Laboratory Compliance Quality Control <br />Blank Blank Report LCS LCSD LCS/LCSD <br />Analx'sis Name Result MDL Units $REC $REC Limits RPD RPD Max <br />Batch number: M031751AA Sample number(s): 4069289-4069290 <br />MTBE N.D. 0.4 ppm(v) <br />C2 -C10 Hydrocarbons N.D. 1.0 ppm(v) <br />Benzene N.D. 0.5 ppm(-) 88 48-169 <br />Toluene N.D. 0.8 ppm(v) 91 48-175 <br />Ethylbenzene N.D. 0.4 ppm(v) 84 59-152 <br />Xylene (total) N.D. 0.7 ppm(v) 77 63-163 <br />F <br />r <br />*- Outside of specification <br />The result for one or both determinations was less than five times the LOQ. <br />`,, ,. The background result was more than four times the spike added. <br />F <br />Lancaster Laboratories, Inc. <br />M E M B E R 2425 New Holland Pike <br />* ®PO Boz 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax: 717-656-2681 <br />2216 Rev. 3110103 <br />