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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.lancasteriabs.com <br /> Page I of 2 <br /> REVISED <br /> i <br /> Quality Control Summary <br /> r <br /> Client Name: ChevronTexaco Group Number: 947624 <br /> Reported: 08/01/05 at 02:41 PM <br /> i <br /> i <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 jotherwise specified in the ' # <br /> method. <br /> I I <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unite 94REC %REC Limits RPD RPA Max' <br /> Batch number: 05169A08B Sample number(s) : 4544476-4544479 { <br /> TPH-GRO - Waters N.D. 50. ug/1 96 102 76-130 6 30 <br /> ! <br /> Batch number: W051681AA Sample number(s) ; 4544476-4544480 I I <br /> Ethanol N.D. 50. ug/l 123 30-155 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 u9/1 91 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/1 94 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/1 93 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 94 79-113 j <br /> t-Butyl alcohol N.D. 5. ug/l 99 57-141 <br /> 1 Benzene N.D. 0.5 ug/1 98 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 ug/1 98 77-132 <br /> Toluene N.D. 0.5 ug/1 101 85-115 j <br /> 1,2-Dibromoethane N.D. 0.5 u9/1 100 91-114 <br /> Ethylbenzene N.D. 0.5 ug/1 102 82-119 ! <br /> Xylene (Total) N.D. 0.5 ug/l 103 83-113 <br /> Batch number: W051681AB Sample nurpber(s) : 4544478-4544479 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/1 91 77-127 <br /> Sample Matrix Quality Control ' <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup ,RPD <br /> Analysis Name %RSC %RiiC Limits RPD MAX Conc Conc RPD Max } <br /> 3 <br /> Batch number: 05169A08B Sample number(s) : 4544476-4544479 <br /> TPH-GRO - Waters 114 63-154 <br /> , F <br /> Batch number: W051681AA Sample number(s) : 4544476-4544480 <br /> Ethanol 101 973 26-153 4 30 <br /> Methyl Tertiary Butyl Ether 96 89' 69-134 8 30 <br /> di-Isopropyl ether 98 92'° 75-130 7 30 <br /> Ethyl t-butyl ether 96 90, 78-119 7 30 i <br /> t-Amyl methyl ether 97 91; 77-117 7 30 } <br /> t-Butyl alcohol 96 89' 51-147 7 30 <br /> Benzene (2) (2) 83-128 19 30 i <br /> 1,2-Dichloroethane 117 108 73-136 7 30 <br /> Toluene 106 96' 83-127 9 30 <br /> 1,2-Dibromoethane 103 96-� 78-120 7 30 <br /> Ethylbenzene 108 99: 82-129 8 30 <br /> Xylene tTctal) 94 73* 82-130 12 30 <br /> i <br /> *-Outside of specification <br /> (I) 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 /> I <br /> i <br />