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U <br /> Lancaster <br /> Laboratories AnaIYS ' Reporf <br /> 2425 New Holland Pike.PO Box 12425.Lancaster'PA 17605-2425•717.656-2300 Fax:717-656-2681-www.lancasterlahs.com <br /> Page 1 of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 925340 I <br /> Reported: 12/30/04 at 01:27 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 t <br /> I <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %REC Limits RPD APD Max <br /> Batch number: 04353AOSC Sample number(s) : 4431417 <br /> TPH-GRO - Waters N.D. 50. ug/1 110 112 70-130 2 30 <br /> Batch number: 04353A08D Sample number(s) : 4431418 <br /> TPH-GRO - Waters N.D. 50. ug/l 110 112 70-130 2 30 <br /> Batch number: Z043571AA Sample number(s) : 4431418 <br /> Ethanol N.D. 50. u9/1 95 46-145 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 94 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/l 104 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 96 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 92 79-113 <br /> t-Butyl alcohol N.D. S. ug/l 88 57-141 <br /> Benzene N.D. 0.5 ug/l 96 85-117 <br /> 1,2-DI chloroethane N.D. 0.5 ug/l 91 77-132 <br /> Toluene N.D. 0.5 ug/l 97 85-115 <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 95 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 97 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 96 83-113 <br /> Batch number: Z043631AA Sample number(s) : 4431417 <br /> Ethanol N.D. 50. ug/l 93 46-145 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 98 77-127 <br /> di-Isopropyl ether N-D_ 0.5 ug/l 100 67-130 <br /> Ethyl t»butyl ether N.D- 0.5 ug/l 99 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 100 79-113 <br /> t-Butyl alcohol N.D. 5. ug/l 98 57-141 <br /> Benzene N.D. 0.5 ug/l 103 85-117 <br /> 1,2-Dichloreethane N-D. 0.5 ug/l 100 77-132 <br /> Toluene N.D- 0.5 ug/l 103 85-115 <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 101 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 105 82-119 <br /> Xylene {Total) N.D. 0.5 ug/l 103 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG Dpp DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Cone RPD Max <br /> Batch number: 04353A08C Sample number(s) : 4431417 as <br /> TPH-GRO - Waters 126 63-154 - <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 />