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Lancaster <br /> Laboratories i4 n a I ys►s Report <br /> 2425 New Holland Pike,Po Brno 12425 Lancaster,PA 17605.2425•717 656 2300 Fax 717-656-2681•www lancasterlabs corn <br /> Page ] of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 883019 <br /> Reported 02/06/04 at 08 43 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units REC REC Limits RPD RPD M ac <br /> Batch number 04033A53A Sample number(s) 4207053-4207055 <br /> TPH-GRO - Waters N D 50 ug/l 107 118 70-130 11 30 <br /> Batch number 04033A53B Sample number(s) 4207056 <br /> si'PH-GRO - Wat6rs N D 50 ug/l 107 118 70-130 11 30 <br /> Batch number P040342AA Sample number(s) 4207053-4207054 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 93 77-127 <br /> Benzene N D 5 ug/l 93 85-117 <br /> Toluene N D 5 ug/l 91 85-115 <br /> Ethylbenzene N D 5 ug/l 92 82-119 <br /> Xylene (Total) N D 5 ug/l 93 84-120 <br /> Batch number P040352AA Sample number(s) 4207055-4207056 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 89 77-127 <br /> Benzene N D 5 ug/l 87 65-117 <br /> Toluene N D 5 ug/l 86 85-115 <br /> Ethylbenzene N D 5 ug/1 88 82-119 <br /> Xylene (Total) N D 5 ug/1 88 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 04033A53A Sample numbers) 4207053-4207055 <br /> TPH-GRO - Waters 107 63-154 <br /> Batch number 04033A53B Sample number(s) 4207056 <br /> TPH-GRO - Waters 107 63-154 <br /> Batch number P040342AA Sample number(s) 4207053-4207054 <br /> Methyl Tertiary Butyl Ether 93 93 69-134 0 30 <br /> Benzene 98 98 63-128 0 30 <br /> Toluene 96 97 83-127 1 30 <br /> Ethylbenzene 97 98 82-129 1 30 <br /> Xylene (Total) 96 97 82-130 0 30 <br /> Batch number P040352AA Sample number(s) 4207055-4207056 <br /> Methyl Tertiary Butyl Ether 92 94 69-134 2 30 <br /> Benzene 97 97 83-128 1 30 <br /> Toluene 97 98 83-127 1 30 <br /> Ethylbenzene 97 98 82-129 1 30 <br /> Xylene (Total) 97 98 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04033A53A <br /> Outside of specification <br /> The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br />