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Lancaster <br /> **Laboratories <br /> Analysis Report <br /> 2425 New Holland pike PO Box 12425 Lancaster PA 117605-2425•717 656-2300 Fax 717-658-2681•www Ianca5terlabs com <br /> Page 1 of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 905930 <br /> Reported 08/08/04 at 10 54 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 NDL Units %RBC %REC Limits RPD RPD Max <br /> Batch number 04215A16A Sample number(B) 4321326-4321329 <br /> TPH-GRO - Waters N D 50 ug/l 96 98 70-130 2 30 <br /> Batch number Z04217lAA Sample number(s) 4321326-4321327 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 110 77-127 <br /> Benzene N D 5 ug/l 97 85-117 <br /> Toluene N D 5 ug/l 93 85-115 <br /> Ethylbenzene N D 5 ug/1 93 82-119 <br /> Xylene (Total) N D 5 ug/l 92 83-113 <br /> Batch number Z042181AA Sample number(s) 4321328-4321329 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 111 77-127 <br /> Benzene N D 5 ug/l 99 85-117 <br /> Toluene N D 5 ug/l 98 85-115 <br /> Ethylbenzene N D 5 ug/1 97 82-119 <br /> Xylene (Total) N D 5 ug/1 95 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 Cone RPD Max <br /> Batch number 04215A16A Sample number(s) 4321326-4321329 <br /> TPH-GRO - Waters 63 63-154 <br /> Batch number Z042171AA Sample number(s) 4321326-4321327 <br /> Methyl Tertiary Butyl Ether 111 117 69-134 2 30 <br /> Benzene 104 110 83-128 2 30 <br /> Toluene 99 100 83-127 1 30 <br /> Ethylbenzene 105 107 82-129 1 30 <br /> Xylene (Total) 97 98 82-130 1 30 <br /> Batch number Z042181AA Sample number(s) 4321328-4321329 <br /> Methyl Tertiary Butyl Ether 108 108 69-134 0 30 <br /> Benzene 102 103 83-128 1 30 <br /> Toluene 97 99 83-127 2 30 <br /> Ethylbenzene 97 98 82-129 1 30 <br /> Xylene (Total) 93 94 82-130 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 />