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Lancaster <br /> Laboratories Analysis Report <br /> wr,New Holland Pike PO Box 12425 Lencaslar PA 17605-2425-717-6562300 Fax 717-656-2681•www lancasterlabs corn <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 849857 <br /> Reported 05/09/03 at 03 00 PM <br /> Sample Matrix Quality Control <br /> Me MSD MS/MSD RPD EKG DUP DUP DUP <br /> RPD <br /> Analysis Name %REC %REC Limiter RPD MAX Conc Conc RPD Max <br /> Methyl Tertiary Butyl Ether 95 94 69-134 1 30 <br /> Benzene 105 102 83-128 3 30 <br /> Toluene 108 106 83-127 1 30 <br /> Ethylbenzene 111 108 82-134 3 30 <br /> Xylene (Total) 111 109 82-130 2 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0311BB53A <br /> Trifluorotoluene-F <br /> 4034561 93 <br /> 4034562 92 <br /> 4034563 91 <br /> Blank 87 <br /> LCS 95 <br /> &D 97 <br /> 96 <br /> Lamps 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03118BS313 <br /> Trifluorotoluene-F <br /> 4034564 91 <br /> Blank Be <br /> LCS 95 <br /> LCSD 97 <br /> MS 96 <br /> Lamats 57-146 <br /> Analysis Name BTEX + Oxygenates by 8260B <br /> Batch number P031202AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4034562 90 89 100 100 <br /> Blank 100 98 103 101 <br /> LCS 99 100 101 103 <br /> MS 98 96 101 104 <br /> MSD 98 100 101 104 <br /> Limits 81-120 82-112 85-112 83-113 <br /> Analysis Name BTEX + Oxygenates by 8260B <br /> Batch number P031222AA <br /> bibromofluoromethane 1,2-Dichloroethane-d4 Toluene-do 4-Bromofluorobenzene <br /> 4034563 96 95 102 98 <br /> 4034564 96 96 191 98 <br /> *-Outside of specification <br /> 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 />