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LancasterReport <br /> Laboratories Analysis p <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 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 892657 <br /> Reported 04/26/04 at 02 23 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Anal sis Name 96REC %REC Limits RPD MAX Conc co nc RPD Max <br /> Ethylbenzene 101 102 82-129 2 30 <br /> Xylene (Total) 103 104 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name Methanol and Ethanol <br /> Batch number 041110029A <br /> Acetone <br /> 4257072 105 <br /> 4257073 103 <br /> 4257074 103 <br /> Blank 107 <br /> LCS 109 <br /> MS 104 <br /> MSD 104 <br /> Limits 80-132 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04112A07C <br /> Trifluorotoluene-F <br /> 4257072 88 <br /> 4257073 87 <br /> 4257074 90 <br /> Blank 87 <br /> LCS 109 <br /> LCSD 110 <br /> MS 104 <br /> Limits 57-146 <br /> Analysis Name BTEX+5 Oxygenates+EDC+EDB+ETON <br /> Batch number PD41171AA <br /> Dibromofluoromethane 1 2-Dichloroethane-d4 Toluene-de 4-Bromoflucrobenzene <br /> 4257072 98 93 98 93 <br /> 4257073 100 94 98 92 <br /> 4257074 98 94 98 92 <br /> Blank 100 93 98 94 <br /> LCS 98 92 97 94 <br /> MS 100 94 97 93 <br /> MSD 99 94 97 92 <br /> Limits 81-12u 82-112 85-112 83-113 <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 />