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i <br /> , <br />�. Lancaster � ' <br /> _ Laboratories Anal is Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717.6562681•www.iarkcasteriabs.com t <br /> Page 1 of 2 <br /> .g Quality Control Summary E <br /> Client :Name: ChevronTexaco Group Number: 915295 <br /> Reported: 10/18/04 at 02:36 PM k <br /> ' I <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> i 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 /> ,k <br /> Laboratory Compliance Quality Control f� <br /> 6 �S Blank Blank Report LCs LCSD LCS/LCSD 'i <br /> Analysis'Name Result MDL Units %REC %REC Limits RPD RPA Max <br /> Batch number: 04284A16A Sample number(s) : 4371335-4371336 I <br /> TPH-GRO _ Waters N.D. 50. ug/l 100 90 70-130 10 30 k <br /> Batch nurtmber:'Z042891AA Sample number(s) : 4371335-4371336 <br /> Ethanol N.D. 50. ug/l 8o 46-145 <br /> Methyl:Tertiary Butyl Ether N.D. 0.5 ug/l 88 77-127 a <br /> di-Isopropyl ether N.D. 0.5 ug/l 88 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 87 74-120 <br /> t-Amyl`methyl ether N.D. 0.5 ug/1 67 79-113 <br /> j t-Butyl alcohol N.D. 5. ug/l 90 57-141 <br /> Benzene ,, N.D. 0.5 ug/l 90 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 u9/1 93 77-132 <br /> Toluene , N.D. 0.5 ug/l 90 85-115 <br /> 1,2-Dibromoethane. N.D: 0.5 ug/1 90 81-114 <br /> 1 Ethylbenzene N.D. 0.5 ug/l 91 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 93 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis- Name 96REC 199c Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 04284A16A Sample number(s) : 4371335-4371336 i <br /> 4 TPH-GRO "- Waters 108 63-154 <br /> I Batch !number: Z042891AA Sample number(s) : 4371335-4371336 <br /> Ethanal 75 79 33-153 5 30 <br /> ` <br /> Methyl- Tertiary Butyl Ether 89 90 69-134 1 30 <br /> di-Isopropyl ether 91 92 75-130 1 30 <br /> _ Ethyl t-butyl ether 89 90 78-119 1 30 <br /> t-Amyl methyl ether 88 88 77-117 1 30 <br /> t-Butyl 'alcohol 97 92 51-147 3 30 <br /> Benzene 94 95 83-128 1 30 <br /> 1,2-Dichloroethane 94 95 73-136 1 30 <br /> Toluene ', 94 94 83-127 0 30 <br /> 1,2-Dibrbmoethane` 91 90 78-120 1 30 <br /> ' Ethylbenzene 96 95 82-129 0 30 <br /> Xylene, (Total) 95 95 62-130 0 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 /> y <br /> i [I <br /> 'h V. <br />