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Lancasterr <br /> Laboratories Analysis Report <br /> 5 New Holland Pike PO Box 12425 Lancaster,PA 17605-2425•717 656 2300 Fax 717-656-2681•www lancasterlabs com <br /> Page 1 of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 893334 <br /> Reported 04/30/04 at 10 26 AM <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 bIDL units $REC $RSC Limits RPD RPD Max <br /> Batch number 0411SA16A Sample number(s) 4260011-4260014 <br /> TPH-GRO - Waters N D 50 ug/1 102 105 70-130 3 30 <br /> Batch number P041192AA Sample number(s) 4260011-4260012 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 101 77-127 <br /> Benzene N D 5 ug/1 102 85-117 <br /> Toluene N D 5 ug/l 101 85-115 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> lene (Total) N D 5 ug/1 102 84-120 <br /> tch number P041194AA Sample number(a) 4260013-4260014 <br /> ethyl Tertiary Butyl Ether N D 2 ug/l 102 77-127 <br /> Benzene N D 5 ug/1 103 85-117 <br /> Toluene N D 5 ug/1 104 85-115 <br /> Ethylbenzene N D 5 ug/l 105 82-119 <br /> Xylene (Total) N D 5 ug/l 105 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DVP D17P Delp RFD <br /> Analysis Name %REC %REC Limits RPD MAX Conn Conc RPD Max <br /> Batch number 0411BA16A Sample number(s) 4260011-4260014 <br /> TPH-GRO - Waters 89 63-154 <br /> Batch number P041192AA Sample number(s) 4260011-4260012 <br /> Methyl Tertiary Butyl Ether 97 102 69-134 6 30 <br /> Benzene 91 106 83-128 15 30 <br /> Toluene 92 106 83-127 14 30 <br /> Ethylbenzene 92 105 82-129 13 30 <br /> Xylene (Total) 94 107 82-130 13 30 <br /> Batch number P041194AA Sample number(s) 4260013-4260014 <br /> Methyl Tertiary Butyl Ether 103 103 69.134 0 30 <br /> Benzene 109 109 83-128 0 30 <br /> Toluene 109 109 83-127 0 30 <br /> Ethylbenzene 109 109 82-129 0 30 <br /> Xylene (Total) 110 109 82-130 1 30 <br /> *-Outside of specification <br /> 0The 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 />