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Lancaster <br /> Laboratories �4 n a I ys�. <br /> s Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 176052425+717 656 2300 Fax 717 656-2681•www Iancasterlabs com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 882499 <br /> Reported 02/02/04 at 05 50 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup <br /> RPD <br /> Analysis Name REC %REC L'ImIts RPD MAX Conc Conc RPD Max <br /> Batch number P040301AA Sample number(s) 4204640 <br /> Methyl Tertiary Butyl Ether 99 99 69-134 0 30 <br /> Benzene 102 102 83-328 0 30 <br /> Toluene 98 100 83-127 2 30 <br /> Ethylbenzene 100 101 82-129 1 30 <br /> Xylene (Total) 98 99 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0402BA07A <br /> Trxfluorotoluene-F <br /> 4204642 87 <br /> 4204645 94 <br /> Blank 77 <br /> LCS 10 <br /> MS 1066 <br /> MSD 107 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0402BA07B <br /> Trifluorotoluene-F <br /> 4204641 91 <br /> 4204643 96 <br /> 4204644 80 <br /> Blank 80 <br /> LCS 100 <br /> MS 106 <br /> MSD 107 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0402BA07C <br /> Trifluorotoluene-F <br /> 4204640 78 <br /> 4204646 79 <br /> 4204647 83 <br /> 4204648 79 <br /> 4204649 81 <br /> 4204650 88 <br /> Blank 79 <br /> LCS 100 <br /> MS 106 <br /> MSD 107 <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 /> i <br /> I <br /> I <br /> I <br />