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Lancaster, <br /> Laboratories Analysis Rep ort <br /> 2425 New Holland Pike,PO Box 12425 Lancaster,PA 17605-2425•717-656-2300 Fax 717 656-2681•www lancasterlabs Com <br /> Pagel of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 873562 <br /> Reported 11/12/03 at 04 37 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result rDL Unite %REC %REC Limits RPD RPD Max <br /> Batch number 0331OA07B Sample number(S) 4157341-4157343,4157345-4157348 <br /> TPH-GRO - Waters N D 50 ug/l 89 112 70-130 23 30 <br /> Batch number 0331OA07C Sample number(s) 4157344,4157349-4157350 <br /> TPH-GRO - Waters N D 50 ug/l 89 112 70-130 23 30 <br /> Batch number P033112AA Sample number(S) 4157341 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 94 77-127 <br /> Benzene N D 5 ug/l 99 85-117 <br /> Toluene N D 5 ug/l 100 85-115 <br /> Ethylbenzene N D 5 ug/l 99 82-119 <br /> Xylene (Total) N D 5 ug/l 101 84-120 <br /> Batch number P033153AA Sample number(s) 4157342-4157350 <br /> Ethanol N D 500 ug/l 89 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 95 77-127 <br /> di-Isopropyl ether N D 2 ug/l 86 74-125 <br /> Ethyl t-butyl ether N D 2 ug/l 88 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 94 79-113 <br /> t-Butyl. alcohol N D 100 ug/l 90 53-147 <br /> Benzene N D 5 ug/l 95 85-117 <br /> Toluene N D 5 ug/l 97 85-115 <br /> Ethylbenzene N D 5 ug/l 96 82-119 <br /> Xylene (Total) N D 5 ug/l 98 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %RBC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 0331GA07B Sample number(s) 4157341-4157343,4157345-4157348 <br /> TPH-GRO - Waters 134 63-154 <br /> Batch number 0331OA07C Sample number(s) 4157344,4157349-4157350 <br /> TPH-GRO - Waters 134 63-154 <br /> Batch number P033112AA Sample number(s) 4157341 <br /> Methyl 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 /> Batch number P033153AA Sample number(a) 4157342-4157350 <br /> Ethanol. 94 93 38-149 0 30 <br /> Methyl Tertiary Butyl Ether 97 98 69-134 1 30 <br /> dx-Isopropyl ether 89 90 75-130 1 30 <br /> Ethyl t-butyl ether 89 91 78-119 2 30 <br /> t-Amyl methyl ether 96 97 77-117 0 30 <br /> t-Butyl alcohol 93 96 44-150 3 30 <br /> Benzene 102 103 83-128 1 30 <br /> Toluene 102 105 83-127 3 30 <br /> Ethylbenzene 101 104 82-129 3 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five tunes the LOQ . <br /> (2) The background result was more than four times the spike added <br />