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Lancaster <br /> Analysis Report <br /> Laboratories Y <br /> .2425 New Holland Pike,PQ Box 12425,Lancaster,PA 17605-2425•717.656.2300 Fax:717-656-2681•www.lancasterlabs.com <br /> } <br /> Page 1 of 2 r <br /> Quality Control Summary. i <br /> Client Name: ChevronTexaco Group Number: 928957 <br /> Reported: 01/30/05 at 11:30 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 <br /> a batch level,a LCS/LCSD was performed, unless otherwise specified in the <br /> method. <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unite 90,R6C %REC Limits RPD RPD Max <br /> Batch number: 05020A53C Sample number(s) : 4450486-4450489 <br /> TPH-GRO - Waters N.D. 50. ug/l 98 99 70-130 0 30 <br /> Batch number: N0502CIA13 Sample number(s) : 4450486-4450489 <br /> Ethanol N.D. 50. ug/l 99 46-145 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/1 114 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/1 68 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 102 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 104 79-113 <br /> t-Butyl alcohol N.D. 5. ug/l 98 57-141 <br /> Benzene N.D. 0.5 ug/l 95 85-117 E <br /> 1,2-Dichloroethane N.D. 0.5 Ug/l 129 77-132 <br /> Toluene N.D. 0.5 ug/1 90 85-115 } <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 92 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 95 82-119 <br /> Xylene (Total) N.D. 0.5 ug/1 95 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD ERG DUP DUP Dup RPD <br /> Analysis Name %REC 9oREC Limits RPD MAX Conn Conc RPD Max <br /> Batch number: 05020A53C Sample number(s) : 4450486-4450489 <br /> TPA-GRD - Waters 110 63-154 <br /> L� <br /> Hatch number: N050261AB Sample number(s) : 4450486-4450489 <br /> Ethanol 98 96 33-153 2 30 <br /> Methyl Tertiary Butyl Ether 121 123 69-134 1 30 <br /> di-Isopropyl ether 94 96 75-130 1 30 <br /> Ethyl t-butyl ether 109 109 78-119 0 30 <br /> t-Amyl methyl ether 108 110 77-117 2 30 <br /> t-Butyl alcohol 104 101 51-147 3 30 <br /> Benzene 103 103 83-128 0 30 <br /> 1,2-Dichloroethane 133 133 73-136 0 30 <br /> Toluene 97 97 83-127 0 30 <br /> 1,2-Dibromoethane 95 93 78-120 2 30 <br /> Ethylbenzene 102 102 82-129 0 30 <br /> Xylene (Total} 102 103 82-130 0 30 <br /> J <br /> �-Outside of specification i <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 />