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T p <br /> Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PC Box 12425 Lanoaster PA 17605-2425•717-656 2300 Fax 717 656 2681 www lancasterlabs com • <br /> Page I of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco c/o SECOR Group Number 904094 <br /> Reported 07/27/04 at 12 57 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 96REC Llmita RPD RPD Max <br /> Batch number 0420GA08B Sample number(s) 4312580-4312584 <br /> TPH-GRO - Waters N D 50 ug/l 93 103 70-130 10 30 <br /> Batch number 042010001A Sample number(s) 4312581-4312584 <br /> Methanol (by Direct Infection) N D 200 ug/l 112 76-119 <br /> Batch number P042012AA Sample number(s) 4312580 <br /> Methyl Tertiary Butyl Ether N D 0 5 u9/1 108 77-127 <br /> Benzene N D 0 5 ug/l 108 85-117 <br /> Toluene N D 0 5 ug/l 109 85-115 <br /> Ethylbenzene N D 0 5 ug/l 110 62-119 . <br /> Xylene (Total) N D 0 5 ug/l 108 84-120 <br /> Batch number Z042041AA Sample number(s) 4312581-4312584 <br /> Ethanol N D 50 ug/l 82 46-145 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 105 77-127 <br /> di-Isopropyl ether N D 0 5 ug/l 113 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/l 100 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/l 92 79-113 <br /> t-Butyl alcohol N D 5 ug/l 92 57-141 <br /> Benzene N D 0 5 u9/1 98 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug/l 106 77-132 <br /> Toluene N D 0 5 ug/l 97 85-115 <br /> 1,2-Dibrornoethane N D 0 5 ug/l 103 81-114 <br /> Ethylbenzene N D 0 5 ug/l 96 82-119 <br /> Xylene iTotal) N D 0 5 ug/l 92 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BXG DUP DUP Dup RPD <br /> Analysis Name %RBC %REC Limits RPD MAX Cone Conc RPD Max <br /> Batch number 0420OA08B Sample number(s) 4312580-4312584 <br /> TPH-GRO - Waters 104 63-154 <br /> Batch number 042010001A Sample number(s) 4312581-4312584 <br /> Methanol (by Direct In3ection) 104 108 72-122 4 20 <br /> Batch number P042012AA Sample number(s) 4312580 <br /> Methyl Tertiary Butyl Ether 110 109 69-134 1 30 <br /> Benzene 113 113 83-128 0 30 <br /> Toluene 107 106 83-127 1 30 <br /> *-Outside of specification <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 />