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Lancaster <br /> • Laboratories Analysis Report <br /> 2425 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 903796 <br /> Reported 07/23/04 at 03 52 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DUP Dup RPD <br /> Analysis Name %REC 96REC Limits RPD MAX Conc Conc RPD Max <br /> t-Butyl alcohol 92 94 51-147 2 30 <br /> Benzene 103 108 83-128 5 30 <br /> 1,2-Dichlorcethane 102 107 73-136 6 30 <br /> Toluene 100 104 63-127 4 30 <br /> 1,2-D3,bromoethane 101 104 78-120 3 30 <br /> Ethylbenzene 98 104 82-129 6 30 <br /> Xylene (Total) 94 98 82-130 5 30 <br /> Surrogate Quality Control <br /> Analysis Mame Methanol and Ethanol <br /> Batch number 041970024A <br /> Acetone <br /> 4311250 109 <br /> 4311251 110 <br /> Blank 97 <br /> LCS 97 <br /> MS 97 <br /> MSD 96 <br /> Limits 80-132 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0419SA07A <br /> Trifluorotoluene-F <br /> 4311251 103 <br /> Blank 103 <br /> LCS 119 <br /> LCSD 119 <br /> MS 129 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0419OA07B <br /> Trifluorotoluene-F <br /> 4311242 100 <br /> Blank 101 <br /> LCS 119 <br /> LCSD 119 <br /> MS 129 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04198A07C <br /> Trifluorotoluene-F <br /> I <br /> 4311243 101 <br /> *-Outside of specification <br /> (1) The result for one or both deterrnlnatlons was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br />