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MAILancaster <br /> Laboratories Analysis Report <br /> 5 New Holland Pike,PO Box 12425 Lancaster,PA 17605-2425•717-656 2300 Fax 717-656-2681•www lancasterlabs corn <br /> Page 3 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 882407 <br /> Reported 01/30/04 at 12 08 PNi <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DQP Dup <br /> RPD <br /> Analysis Name 5REC %REC Limits RPD MAX Conc Conc RPD Max_ <br /> Methyl Tertiary Butyl Ether 92 91 69-134 1 30 <br /> di-Isopropyl ether 101 100 75-130 1 30 <br /> Ethyl t-butyl ether 97 95 78-119 2 30 <br /> t-Amyl methyl ether 92 90 77-117 2 30 <br /> t-Butyl alcohol 97 91 51-147 6 30 <br /> Benzene 97 94 83-128 3 30 <br /> Toluene 97 94 83-127 3 30 <br /> Ethylbenzene 98 95 82-129 3 30 <br /> Xylene (Total) 97 95 82-130 3 30 <br /> Surrogate Quality Control <br /> i <br /> Analysis Name Methanol and Ethanol <br /> Batch number 040260007A <br /> Acetone <br /> 04149 108 <br /> 4150 110 <br /> 4151 110 <br /> lank 104 <br /> LCS 108 <br /> MS 108 <br /> MSD 104 <br /> Limits 72-128 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04027A56A <br /> Trifluorotoluene-F <br /> 4204150 95 <br /> Blank 91 <br /> LCS 98 <br /> LCSD 103 <br /> MS 108 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04028A07B <br /> Trifluorotoluene-F <br /> 4204151 81 <br /> 4204152 82 <br /> Blank 80 <br /> LCS 100 <br /> MS 106 <br /> MSD 107 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> *-Outside of specification <br /> +IRThe 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 />