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I <br /> I <br /> Lancaster <br /> Laboratories �t n a 1 ysis Report <br /> IM New Holland Pike PO Box 12425 Lancaster PA 176052425•717-656-2300 Fax 717-656-2681•www lancasterlabs com <br /> Page 3 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 874972 <br /> Reported 11/26/03 at 03 44 PM <br /> Sample Matrix Quality Control <br /> MS MSD M3/MSD RPD BXG DUP DUP Dup <br /> RPD <br /> Analysis Name %RPC REC Limits RPD MAX Conc Conc RPD Max <br /> Toluene 105 97 83-127 7 30 <br /> 1,2-Dibromoethane 99 90 78-120 10 30 <br /> Ethylbenxene 106 97 82-129 9 30 <br /> Xylene (Total) 107 98 82-130 9 30 <br /> Batch number P033222AB Sample number(s) 4165113 <br /> Methyl Tertiary Butyl Ether 89 90 69-134 1 30 <br /> Benzene 94 95 83-128 1 30 ) <br /> Toluene 96 94 83-127 2 30 <br /> Ethylbenzene 97 95 82-129 2 30 <br /> Xylene (Total) 97 96 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03321A08C <br /> Trifluorotoluene-F <br /> JWn5111 111 <br /> k 108 <br /> LCS 116 <br /> MS 145 <br /> MSD 142 <br /> Limits 57-146 <br /> Analysis Name TPS-GRO - Waters <br /> Batch number 03321ASlA <br /> Trifluorotoluene-F <br /> 4165112 121 <br /> 4165113 120 E <br /> 4165114 122 <br /> 4165115 120 <br /> 4165116 113 <br /> 4165117 120 <br /> 4165118 123 <br /> 4165119 118 <br /> 4165120 119 <br /> 4165121 120 <br /> Blank 122 <br /> LCS 124 <br /> LCSD 128 <br /> MS 121 <br /> Limits 57-146 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 033220007A <br /> Acetone <br /> 4165112 117 <br /> *-Outside of specification <br /> 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 />