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i <br /> Lancastera ort <br /> Laboratories Analysis R p <br /> 425 New Holland Pike PO Box 12425 Lancaster PA 17605.2425•717 656 2300 Fax 717-656-2681•www lancasterlabs com <br /> Pagel of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 892231 <br /> Reported 04/28/04 at 01 50 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 LCSILCSD 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 %RBC Limits RPD RPD Max <br /> Batch number 04107A08A Sample number(s) 4254842,4254845 <br /> TPH-GRO - Waters N D 50 ug/l 113 111 70-130 2 30 <br /> Batch number 04107A0SB Sample number(s) 4254640-4254841,4254843-4254844 4254846-4254850 <br /> TPH-GRO - Waters N D 50 ug/1 113 111 70-130 2 30 <br /> Batch number P042111AA Sample number(s) 4254841-4254849 <br /> Ethanol N D 500 ug/1 95 46-145 <br /> thyl Tertiary Butyl Ether N D 2 ug/1 101 77-127 <br /> I <br /> shyl <br /> Isopropyl ether N D 2 ug/1 95 67-130 <br /> t-butyl ether N D 2 ug/1 96 74-120 <br /> t-Amyl methyl ether N D 2 u9/1 101 79-113 <br /> t-Butyl alcohol N D 100 ug/1 112 57-141 <br /> Benzene N D 5 ug/1 101 85-117 <br /> Toluene N D 5 ug/1 95 65-115 <br /> Ethylbenzene N D 5 ug/l 96 82-119 <br /> Xylene (Total) N D 5 ug/1 97 64-120 <br /> Batch number P041112AA Sample number($) 4254840 <br /> Methyl Tertiary Butyl Ether N D 2 u9/1 103 77-127 <br /> Benzene N D 5 ug/1 105 85-117 <br /> Toluene N D 5 ug/1 105 85-115 <br /> Ethylbenzene N D 5 ug/1 105 82-119 <br /> Xylene (Total) N D 5 ug/l 307 64-120 <br /> Batch number P041121AA Sample number(s) 4254842,4254850 <br /> Ethanol N ❑ Soo ug/1 92 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 97 77-127 <br /> di-Isopropyl ether N D 2 ug/1 94 67-130 <br /> Ethyl t-butyl ether N D 2 ug/1 97 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 100 79-113 <br /> t-Butyl alcohol N D 100 ug/1 128 57-141 <br /> Benzene N D 5 ug/l 100 85-117 <br /> Toluene N D 5 ug/1 95 85 115 <br /> Ethylbenzene N D 5 ug/l 95 82-119 <br /> Xylene (Total) N D 5 u9/1 96 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP PUP Pup RPD <br /> Analysis Name SkREC %REC Limits RPD MAX Conc Con c RPD Max <br /> I <br /> Outside of specification <br /> io) The result for one or both determinations was less than five Mmes the LOQ <br /> (2) The background result vias more than four times the spike added <br />