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Lancaster <br /> Laboratories Analysis Rep ort <br /> 2425 New Holland Peke PO Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656 2681 www IancaStedabs corn <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco C/o SECOR Group dumber 904094 <br /> Reported 07/27/04 at 12 57 PM <br /> Sample Matrix Quality Control <br /> Anal sis Name ME MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> --�—ne $Rr3C $RSCLimits RPD MAX Conc Conc RPD Max <br /> Ethylbenzene 111 110 82-129 0 30 <br /> Xylene (Total) 109 109 82-130 0 30 <br /> Batch number Z042041AA Sample number(s) 4312581-4312584 <br /> Ethanol 88 86 41-155 3 30 <br /> Methyl Tertiary Butyl Ether 101 98 69-134 2 30 <br /> di-Isopropyl ether 311 114 75-130 3 30 <br /> Ethyl t-butyl ether 98 101 76-119 3 30 <br /> t-Amyl methyl ether 89 91 77-117 2 30 <br /> t-Butyl alcohol 91 94 51-147 4 30 <br /> Benzene 98 102 83-128 4 30 <br /> 1,2-Dxchloroethane 100 104 73-136 4 30 <br /> Toluene 97 99 83-127 2 30 <br /> 1,2-Dibromoethane 97 100 78-120 3 30 <br /> Ethylbenzene 95 98 82-129 3 30 <br /> Xylene (Total) 90 94 82-130 4 30 <br /> Surrogate Quality Control <br /> Oalysis Name TPH-GRO - Waters <br /> Batch number 0420OA08B <br /> Trifluorotoluene-F <br /> 4312580 106 <br /> 4312581 105 <br /> 4312562 105 <br /> 4312583 105 <br /> 4312584 104 <br /> Blank 105 <br /> LCS 115 <br /> LCSD 116 <br /> MS 107 <br /> LIMIts 57-146 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 042010001A <br /> Acetone <br /> 4312561 101 <br /> 4312582 104 <br /> 4312583 100 <br /> 4312584 99 <br /> Blank 100 <br /> LCS 100 <br /> MS 98 <br /> MSD 97 <br /> Limits 80-132 <br /> Analysis Name BTEX+MTBE by 6260B <br /> Batch number P042012AA <br /> *-Outside of specification <br /> (1) The 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 />