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ti„, <br /> 41 Lancaster , <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 176052425 717 656 2300 Fax 717 656 2661 WWW lancastarlabs com <br /> Page I of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 927693 <br /> Reported 01/20/05 at 05 15 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 Units %REC %REC Limits RFD RPD Max <br /> Batch number 05012A08A Sample number(s) 4443810 <br /> TPH-GRO - Waters N D 50 ug/l 105 106 70-130 1 30 <br /> Batch number 05012A08B Sample number(s) 4443806-4443809,4443811-4443816 <br /> TPH-GRO - Waters N D 50 ug/l 105 106 70-130 1 30 <br /> Batch number N050191AA Sample number(s) 4443807-4443810 4443612 <br /> Ethanol N D 500 ug/l 82 46-145 <br /> OK1 Tertiary Butyl Ether N D 2 ug/l 107 77-127 <br /> opropyl ether N D 2 ug/l 92 67-130 <br /> I t-butyl ether N D 2 ug/l 101 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 100 79-113 <br /> t-Butyl alcohol N D 100 1;9/1 129 57-141 <br /> Benzene N D 5 ug/l 95 85-117 <br /> Toluene N D 5 ug/l 91 85-115 <br /> Ethylbenzene N D 5 ug/1 94 82-119 <br /> Xylene (Total) N D 5 ug/3 95 83-113 <br /> Batch number N050191AD Sample number(s) 4443811,4443613-4443816 <br /> Ethanol N D 500 ug/l 82 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 107 77-127 <br /> d1-Isopropyl ether N D 2 ug/l 92 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 101 74-120 <br /> t-Amyl methyl ether N D 2 ug/1 100 79-113 <br /> t-Butyl alcohol N D 100 ug/l 129 57-141 <br /> Benzene N D 5 ug/l 95 85-117 <br /> Toluene N D 5 ug/l 91 85-115 <br /> Ethylbenzene N D 5 u9/1 94 82-119 <br /> Xylene (Total) N D 5 ug/l 95 83-113 <br /> Batch number Z050122AA Sample number(s) 4443606 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 94 77-127 <br /> Benzene N D 5 ug/l 102 85-117 <br /> Toluene N D 5 ug/1 103 85-115 <br /> Ethylbenzene N D 5 ug/l 102 62-119 <br /> Xylene (Total) N D 5 ug/l 102 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup RPA <br /> Analysis Name %REC %REC Limits RPD MAX Conc conc RPD Max_ <br /> *-Outside of specification <br /> he result for one or both determinations was less than five times the LOQ <br /> he background result was more than four times the spike added <br />