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Lancaster <br /> Laboratories Analysis Report <br /> 5 New Holland Pike Pp Box 12425 Lancaster,PA 17605.2425+717-656 2300 fax 717-6565-2681•www lancasteriabs corn <br /> Page 1 of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 873549 <br /> Reported 11/10/03 at 09 18 PN[ <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result NDL unite REC %REC Limits RPD RPD Max <br /> Batch number 0331OA08B Sample number(s) 4157282-4157286 <br /> TPH-GRO - Waters N D 50 ug/1 98 70-130 <br /> Batch number P033112AA Sample number(s) 4157282-4157286 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 94 77-127 <br /> Benzene N D 5 ug/l 99 85-117 <br /> Toluene N D 5 ug/1 100 85-115 <br /> Ethylbenzene N D 5 ug/1 99 82-119 <br /> Xylene (Total) N D 5 ug/1 101 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DLTP Dup <br /> RPD <br /> Analysis Name REC &REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 0331OA08B Sample number(s) 4157282-4157286 <br /> TPH-GRO - Waters 117 121 63-154 3 30 <br /> & <br /> ch number P033112AA Sample number(s) 4157282-4157286 <br /> thyl Tertiary Butyl Ether 100 99 69-134 1 30 <br /> Benzene 112 109 83-128 2 30 <br /> Toluene 110 110 83-127 0 30 <br /> Ethylbenzene 109 110 82-129 2 30 <br /> Xylene (Total) 111 112 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Wagers <br /> Batch number 03310A06B <br /> Trifluorotoluene-F <br /> 4157282 110 <br /> 4157283 110 <br /> 4157284 109 <br /> 4157285 110 <br /> 4157286 111 <br /> Blank 110 <br /> LCS 117 <br /> MS 113 <br /> MSD 115 <br /> Limits 57-146 <br /> Analysis Name BTEX+MTBE by 8260B <br /> Batch number P033112AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4157282 97 93 95 90 <br /> 4157283 97 93 94 90 <br /> *-Outside of specification <br /> 40The 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 />