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Lancaster <br /> Laboratories Analysis Re port <br /> wwmmmwx� <br /> 2425 New Holland Pike,PO Brno 12425,Lancaster,PA 17605-2425 717-656-2300 Fax:717.656 2681•www.lancasterlabs.com r <br /> Page i of 3 <br /> r - . <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 935744 <br /> Reported: 03/23/05 at 08:09 PM , <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted. In these situations,to demonstrate precision and accuracy at r� <br /> a batch level,a LCSILCSD was performed,unless otherwise specified in the <br /> method. <br /> Laboratory Compliance Quality Control <br /> I <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units . %REC �. %REC Limits RPD: RPD Max . <br /> Batch number: 0508OA08B Sample number(s) : 4484299-4484302 1, <br /> TPH-GRO - Waters N.D. 50. ug/l 101 101 70-130 0 30 <br /> Batch number: Z050771AA Sample number(s) : 4464299-4484301 <br /> Ethanol N.D. 50. ug/l 109 30-155 '= <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 88 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/l 85 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 87 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 86 79-113 <br /> t-Butyl alcohol N.D. S. ug/l 90 57-141 <br /> Benzene N.D. 0.5 ug/l 90 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 ug/l 99 77-132 I <br /> Toluene N.D. 0.5 ug/l 93 R? 85-115 <br /> 1,2-Dibromoethane N.D. 0.5 ug/1 93 81-114 ` <br /> Ethylbenzene N.D. 0.5 ug/1 95 82-119 <br /> Xylene (Total) N.D. 0.5 u9/1 95 J 83-113 <br /> Batch number: Z050781AA Sample number(s) : 4484302 <br /> Ethanol N.D. 50. ug/l 129 131 30-155 1 30 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 87 87 77-127 0 30 <br /> di-Isopropyl ether N.D. 0.5 ug/l 88 87 67-130 1 30 . <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 87 87 74-120 1 30 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 85 85, 79-113 1 30 <br /> t-Butyl alcohol N.D. 5. ug/1 91 90 57-141 1 30 <br /> Benzene 'N.D. 0.5 ug/l 90 " 90 85-117 0 30 <br /> 1,2-Dichloroethane N-D. 0.5 ug/l 103 101 77-132 2 30 <br /> Toluene N.D. 0.5 ug/l 95 95 85-115 0 30 �1 <br /> 1,2-Dibromoethane N.D. 0.5 ug/1 92 93 81-114 2 30 1 <br /> Ethylbenzene N.D. 0.5 ug/l 96 96 82-119 0 30 <br /> Xylene (Total) N.D. 0.5 ug/l 96 96 83-113 0.' 30 <br /> Sample Matrix Quality Control <br /> I11 <br /> MS MSD MS/MSD RPD BKG PIP DVP Dup RPD <br /> Analysis Name %REC. $RSC Limits RPD MAX Conc Conc RPD Maxim <br /> Batch number: 0508OA08B Sample number(s) : 4484299-4484302 h <br /> TPH-GRO - Waters 110 63-154 <br /> Batch number: Z050771AA Sample number(s) : 4484299-4484301 ai <br /> Ethanol 119 131 26-153 9 30 <br /> Methyl Tertiary Butyl Ether 91 90 69-134 1 30 I a ' <br /> 4i <br /> *-Outside of specification 0 <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 />