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401Lancaster i Report <br /> . Laboratories A n a l ys s p <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 176052425•717 656-230o Fax 717-656-2681 www Ia11C8ste►labs Com <br /> Page 2 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 931884 <br /> Reported 02/25/05 at 10 34 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Recruit MDL Unita %REC %RSC Limits RPD RPD Max <br /> Ethyl t-butyl ether N D 0 5 ug/1 96 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 96 79-113 <br /> t-Butyl alcohol N D 5 ug/l 70 57-141 <br /> Benzene N D 0 5 ug/1 95 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug/l 100 77-132 <br /> Toluene N D 0 5 ug/l 97 85-115 <br /> 1,2-Dibromoethane N D 0 5 ug/1 100 81-114 <br /> Ethylbenzene N D 0 5 ug/1 98 82-119 <br /> Xylene (Total) N D 0 5 ug/l 97 83-113 <br /> Batch number Z050533AA Sample number(s) 4465288 <br /> Ethanol N D 50 ug/1 95 46-145 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 84 77-127 <br /> di-Isopropyl ether N D 0 5 ug/1 B4 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/1 84 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 86 79-113 <br /> t-Butyl alcohol N D 5 ug/1 86 57-141 <br /> Benzene N D 0 5 ug/1 85 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug/1 85 77-132 <br /> Toluene N D 0 5 ug/l 85 85-115 <br /> 2-Dibromoethane N D 0 5 ug/l 85 81-114 <br /> hylbenzene N D 0 5 ug/1 87 82-119 <br /> ylene (Total) N D 0 5 ug/1 87 83-313 <br /> Batch number Z050541AA Sample number(s) 4465287 <br /> Ethanol N D 50 ug/1 117 46-145 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 89 77-127 <br /> di-Isopropyl ether N D 0 5 ug/l 90 67-130 <br /> Ethyl t-butyl ether N D O 5 ug/1 90 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 91 79-113 <br /> t-Butyl alcohol N D 5 ug/l 90 57-141 <br /> Benzene N D 0 5 ug/1 91 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug/1 92 77-132 <br /> Toluene N D 0 5 ug/l 91 85-115 <br /> 1,2-Dibromoethane N D O 5 ug/l 89 81-114 <br /> Ethylbenzene N D 0 5 ug/1 93 82-119 <br /> Xylene (Total) N D 0 5 ug/1 93 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 05047AIGA Sample number(s) 4465277-4465284,4465287-4465268 <br /> TPH-GRO - Waters 110 63-154 <br /> Batch number D504SA16A Sample number(s) 446528S-4465266 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number 050490012A Sample number(s) 4465278-4465283 <br /> Methanol (by Direct In]ectlon) 104 104 68-130 0 20 <br /> Batch number 050540021A Sample number(s) 4465284-4465288 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> �) The background result was more than four times the spike added <br />