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0Lancaster <br /> Analysis nalysEs Repor# <br /> 2625 New Hol)and Pike,PO Box 12425.Lancaster,Pte,17605-2425•717-656-2300 Fex.717-656-2681-W WVW.lancasieriAbs_tom <br /> Page 3 of 5 <br /> Quality Control Summary <br />' Client Name: Chevron Group Number: 994013 <br /> Reported: 06/29/06 at 10:39 AM <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) - the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> WS MSD MS/HSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name $REQ L— Limit® RPD MA oaa Con RPD Max <br /> tXylene ITotal) 95 101 82-130 6 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report. <br /> Analysis Name: TPH - DRO CA LUFT (Waters) <br />' Batch number: 061700020A <br /> Orthoterphenyl <br /> 4796871 87 <br /> 4796872 88 <br /> 4796873 91 <br /> 10 4796874 104 <br /> 4796875 88 <br /> 4796876 77 <br /> 4796877 89 <br /> 4796878 88 <br /> 4796879 85 <br />' 4796880 63 <br /> 4796881 8o <br /> Blank 63 <br /> LCS 87 <br /> LCSD 87 <br /> Limits; 59-131 <br /> Analysis Name: Methanol and Ethanol <br /> Batch number: 061700021A <br /> Acetone <br /> 4796871 96 <br /> 4796872 97 <br /> 4796873 93 <br /> 4796874 99 <br /> 4796875 95 <br /> 4796876 9E <br /> 4796877 97 <br /> 4796876 99 <br /> 4796879 100 <br /> 4796880 98 <br /> 47968$1 98 <br /> Blank 95 <br /> LCS 95 <br /> MS 95 <br /> MSD 95 <br /> Limits: 67-131 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than rive times the LUQ. <br /> (2) The backeround result was more than four times the spike added. <br />