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Lancasterorf <br /> Laboratories Analysis Rep <br /> 25 New Holland Prke PO Box 12425 Lancaster PA 17605.2425•717 656-2300 Fax 717-656.2681•www laneasterlabs com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 882114 <br /> Reported 01/29/04 at 05 19 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP DUP <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Ma w <br /> Ethanol 46 53 41-155 16 30 <br /> Methyl Tertiary Butyl Ether 83 86 69-134 3 30 <br /> di-Isopropyl ether 86 90 75-130 4 30 <br /> Ethyl t-butyl ether 86 91 78-119 6 30 <br /> t-Amyl methyl ether 85 89 77-117 4 30 <br /> t-Butyl alcohol 55 58 51.-147 6 30 <br /> Benzene 86 93 83-128 5 30 <br /> Toluene 86 B8 83-127 2 30 <br /> Ethylbenzene 85 88 82-129 4 30 <br /> Xylene (Total) 83 86 82-130 3 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04021AOBE <br /> Trifluorotoluene-F <br /> IV2390 110 <br /> 2391 117 <br /> ank 114 <br /> LCS 115 <br /> MS 117 <br /> MSD 118 <br /> Limits 57-146 <br /> Analysis Name TPH - DRO CA LUFT (Waters) <br /> Batch number 040220009A <br /> orthoterphenyl <br /> 4202391 88 <br /> Blank 81 <br /> LCS 91 <br /> LCSD 97 <br /> Limits 59-139 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 040260006A <br /> Acetone <br /> 4202391 106 <br /> Blank 113 <br /> LCS 108 <br /> MS 110 <br /> MSD 110 <br /> Limits 72-128 <br /> Analysis Name BTEX+MTBE by 8260E <br /> Batch number N040261AA <br /> mbromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <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 />