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Lancaster <br /> Laboratories_ _u - �4nalysis-Report r; <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656 2300 fax 717-656-2681 www lancasterlabs 00171 <br /> Page 2 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 903796 <br /> Reported 07/23/04 at 03 52 PM <br /> Laboratory Compliance Quality Control <br /> r Blank Blank Report LCS - LCSD "LCS/LCSD - <br /> Analysis Name Result MDL Unita %RBC %REC Limits RPA RPD Max <br /> 1,2-Dichloroethane N D 2 ug/1 107 77-132 <br /> Toluene N D 5 ug/l 102 85-115 <br /> 1,2-D>_bromoethane N D 2 ug/1 106 81-114 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> Xylene (Total) N D 5 ug/l 98 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name $REC $REC Limits RPD MAX Conn Conc RPP Max <br /> Batch number 041970024A Sample number(s) 4311250-4311251 <br /> Methanol (by Direct Injection), -4* -7* 72-122 25* 20 <br /> Batch number 0419BA07A Sample number(s) 4311251 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number 0419BA07B Sample number(s) 4311242 <br /> TPH-GRO - Waters 115 63-154 <br /> t <br /> ip, <br /> Batch number 04198A07C Sample numbers) 4311243 4311245-4311247,4311249-4311250 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number 0419BA07D Sample number(s) 4311244,4311248 <br /> TPH-GRO - Waters 115 63-154 <br /> - Batch number P042012AA�— - —==Sample-number s) =4311242-4311249=--- <br /> Methyl Tertiary Butyl Ether 110 109 69-134 1 30 <br /> Benzene 113 113 83-128 0 30 <br /> - Toluene-- µ —� "107" —106 83-127 —I---30— <br /> Ethylbenzene 111 110 82-129 0 30 T T <br /> Xylene (Total) 109 209 82-130 0 30 <br /> Batch number Z042011AA Sample number(s) 4311251 <br /> Ethanol 95 94 41-155 1 30 <br /> Methyl Tertiary Butyl Ether 86 88 69-134 2 30 <br /> di-Isopropyl ether 93 94 75-130 1 30 <br /> Ethyl t-butyl ether 82 84 78-119 2 30 " <br /> t-Amyl methyl ether 76* 78 77-117 3 30 <br /> t-Butyl alcohol 73 76 51-147 3 30 <br /> Benzene 85 86 83-128 1 30 <br /> 1,2-Dlchloroethane 81 B2 73-136 1 30 <br /> - Toluene 81* 81* 83-127 1 30 <br /> 1 2-Dibromoethane 80 81 78-120 1 30 <br /> Ethylbenzene 81* 81* 82-129 1 30 <br /> Xylene (Total) 77* 78* 82-130 1 30 <br /> Batch number Z042031AA Sample number(s) 4311250 <br /> Ethanol 83 Be 41-155 5 30 <br /> Methyl Tertiary Butyl Ether 106 110 69-134 4 30 <br /> di-Isopropyl ether 116 122 75-130 5 30 <br /> Ethyl t-butyl ether 102 108 78-119 5 30 <br /> t-Amyl methyl ether 94 98 77-117 4 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 />