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+tel {7 in �h <br /> Lancaster. ort <br /> Laboratories Analysis Re p <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-242 5•717-656-2300 Fax 717 656-2681 www lancasterlabs com <br /> Page 1 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 938400 <br /> Reported 04/14/05 at 12 42 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 MDL Units %RHC PRBC Limits RPD RPD Max <br /> Batch number 0509BACBE Sample number s) 4497524-4497529 <br /> TPH-GRO - Waters N D 50 ug/1 110 108 70-130 3 30 <br /> Batch number 05098AO8C Sample number(s) 4497530-4497531 <br /> TPH-GRO - Waters N D 50 ug/l 110 108 70-130 3 30 <br /> Batch number OS09BA08D Sample number(s) 4497522-4497523 <br /> TPH-GRO - Waters N D 50 ug/1 110 108 70-130 3 30 <br /> 18tch number 05099A51A Sample number(s) 4497532 <br /> H-GR0 - Waters N D 50 ug/1 98 103 70-130 5 30 <br /> Batch number Z051002AA Sample number(s) 4497522 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 100 77-127 <br /> Benzene N D 5 ug/l 91 85-117 <br /> Toluene N D 5 ug/l 92 85-115 <br /> Ethylbenzene N D 5 ug/l 94 82-119 <br /> Xylene (Total) N D 5 ug/1 94 83-113 <br /> Batch number Z051012AA Sample number(s) 4497523-4497532 <br /> Ethanol N D 500 ug/l 68 30-155 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 100 77-127 <br /> dl-Isopropyl ether N D 2 ug/l 93 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 96 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 99 79-113 <br /> t-Butyl alcohol N D 100 ug/1 91 57-141 <br /> Benzene N D 5 ug/l 89 85-117 <br /> Toluene N D 5 ug/l 91 85-115 <br /> Ethylbenzene N D 5 ug/l 92 82-119 <br /> Xylene (Total) N D 5 ug/l 93 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BAG DUP DUP Dup RPD <br /> Anal sis Name $RRC %REC Lxmi RPD MAX Conc Conc RPD Maxim <br /> Batch number 0509BA08B Sample number(s) 4497524-4497529 <br /> TPH-GRO - Waters 144 63-154 <br /> Batch number 0509BA08C Sample number(s) 4497530-4497531 <br /> TPH-GRO - Waters 144 63-154 <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 />