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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO box 12425 Lancaster PA 17605-2425•717-656 2300 Fax 717 656-2681•www lancasterlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 882764 <br /> Reported 02/09/04 at 02 32 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP DUP <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number P040292AA Sample number(s) 4205520-4205524,4205529 <br /> Methyl Tertiary Butyl Ether 92 91 69-134 1 30 <br /> Benzene 97 94 83-128 3 30 <br /> Toluene 97 94 83-127 3 30 <br /> Ethylbenzene 98 99 82-129 3 30 <br /> Xylene (Total) 97 95 82-130 3 30 <br /> Batch number P040302AA Sample number(s) 4205525-4205526 <br /> Ethanol 69 59 41-155 16 30 <br /> Methyl Tertiary Butyl Ether 96 95 69-134 1 30 <br /> di-Isopropyl ether 108 106 75-130 2 30 <br /> Ethyl t-butyl ether 102 101 78-119 0 30 <br /> t-Amyl methyl ether 98 96 77-137 2 30 <br /> t-Butyl alcohol 94 85 51-147 9 30 <br /> Benzene 104 102 83-128 1 30 <br /> 1,2-Dichloroethane 106 103 73-136 3 30 <br /> Toluene 103 96 83-127 6 30 <br /> 1,2-Dibromoethane 95 93 78-120 3 30 <br /> Ethylbenzene 105 102 82-129 3 30 <br /> Xylene (Total) 103 100 82-130 3 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (waters) <br /> Batch number 040290023A <br /> Orthoterphenyl <br /> 4205521 100 <br /> 4205522 103 <br /> 4205523 93 <br /> 4205524 96 <br /> 4205525 96 <br /> 4205526 95 <br /> 4205527 97 <br /> 4205528 97 <br /> Blank 88 <br /> LCS 106 <br /> LCSD 96 <br /> Limits 59-139 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 040290028A <br /> Acetone <br /> 4205525 108 <br /> 4205526 108 <br /> 4205927 109 <br /> 4205526 102 <br /> Blank 104 <br /> LCS 104 <br /> MS 104 <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 />