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I <br /> LancasterAnalysis Report <br /> . Laboratories Y p <br /> 2425 New Holland PikA,PO Box 12425,Lancaster,PA 17605.2425•717-656-2300 Fax;717-656-2681•www.lancasterlabsxom <br /> Page 2 of 6 <br /> Quality,rControl Summary <br /> Client Name: ChevronTexaco Group Number: 957863 <br /> Reported: 09/15/05 at 01:23 PM <br /> Laboratory Compliance Quality Control <br /> ,:Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unite %RUC %REC Limits RPD APA Max <br /> 1,2-Dichloroethane N.D. o.5 ug/l 105 77-132 <br /> luene N.D. 0.5 ug/l 99 85-115 <br /> 3.,2-Dibromoethane T.D. 0.5 u9/1 95 81-114 „ <br /> Ethylbenzene N.D. 0.5 ug/1 100 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 102 83-113 <br /> Batch number: Z052504AA Sample number(s) : 4596144 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/1 91 77-127 <br /> Benzene N.D. 0.5 ug/l 89 85-117 <br /> Toluene N.D. 0.5 ug/l 93 85-115' <br /> Ethylbenzene N.D. 0.5 ug/l 93 82-119 <br /> Xylene- (Total) N.D. 0.5 ug/l 95 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Pup RPD <br /> Analysis Name $REC %REC Limits RPD ISA Conc Conc RPD Ma_� <br /> Batch number: 0525OA07A Sample number(s) : 4596144-4596147,4596149-4596150 <br /> TPH-GRO - Waters 112 115 63-154 3 30 <br /> Batch number: 052510016A Sample number(s) : 4596145-4596155 , <br /> Methanol (by Direct Injection) 96 100 88-126 4 20 <br /> Batch number: 05252A08A Sample number{s) : 4596151 <br /> TPH-GRO - Waters 128 63-154 <br /> Batch number: 0S252A08B Sample-number(s) : 4596154=4596155 <br /> TPH-GRO - Waters 128 63-154 <br /> Batch,-number: 05252A08C Sample number(s) : 4596148,4596152-4596153 <br /> TPH-GRO - Waters 128 63-154 <br /> Batch number: Z052493AA Sample number(s) : 4596145-4596152 <br /> Ethanol 91 82 26-162 10 30 <br /> Methyl Tertiary Butyl Ether 100 100 69-134 0 30 <br /> di-Isopropyl ether 95 95 75-130 0 30 <br /> Ethyl t-butyl ether 100 99 78-119 1 30 <br /> t-Amyl methyl ether 105 102 72-125 3 30 <br /> t-Butyl alcohol 100 98 56-134 2 30 <br /> Benzene 104 104 83-128 0 30 <br /> 1,2-Dichloroethane 108 108 70-143 0 30 <br /> Toluene 106 108 83-127 2 30 <br /> 1,2-Dibromoethane 96 96 78-120 0 30 <br /> Ethylbenzene 106 107 82-129 1 30 <br /> Xylene (Total) 106 108 82-130 2 30 <br /> Batch number: Z052501AA Sample number(s) : 4596153-4596155 <br /> Ethanol 138 131 26-162 5 30 <br /> Methyl Tertiary Butyl Ether 99 89 69-134 2 30 <br /> di-Isopropyl ether 96 94 75-130 2 30 <br /> Ethyl t-butyl ether 100 98 78-119 2 30 <br /> t-Amyl methyl ether 104 103 72-125 1 30 <br /> *-Outside of specification <br /> (1) 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 />