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Lancasteris Report <br /> • Laboratories Analys 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 6 of 7 <br /> Quality Control Summary <br /> Client Name Chevron'TTexaco Group Number 894184 <br /> Reported 05/13/04 at 09 38 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dug RPD <br /> Analysis Name %REC AsREC Limits RPD MAX Conc Conc RPD Max <br /> Methyl Tertiary Butyl Ether 94 87 69-134 7 30 <br /> Benzene 93 87 83-128 6 30 <br /> Toluene 89 84 83-127 6 30 <br /> Ethylbenzene 90 84 82-129 7 30 <br /> Xylene (Total) 91 85 82-230 7 30 <br /> Batch number P041282AA Sample number(s) 4264506 <br /> Methyl Tertiary Butyl Ether 101 93 69-134 9 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (Waters) <br /> Batch number 041210015A <br /> orthoterphenyl <br /> 4264503 84 <br /> •4264505 85 <br /> 4264506 62 <br /> 4264507 93 <br /> Blank 86 <br /> LCS 105 <br /> LCSD 107 <br /> Limits 57-128 <br /> Analysis Name TCL SW846 Semivolatiles/Waters <br /> Batch number 04122WACO26 <br /> 2-Fluorophenol Phenol-d6 2 4,6-Tribromophenol Nitrobenzene-d5 <br /> 4264503 54 39 82 80 <br /> Blank 58 41 87 80 <br /> LCS 64 43 94 83 <br /> LCSD 64 44 97 89 <br /> Limits 23-94 10-80 45-142 54-124 <br /> 2-Fluorobxphenyl Terphenyl-d14 <br /> 4264503 76 80 <br /> Blank 76 88 <br /> LCS 87 98 <br /> LCSD 91 98 <br /> Limits 64-112 53-124 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04124ASlA <br /> Trifluorotoluene-F <br /> 4264502 90 <br /> 4264503 88 <br /> 4264505 87 <br /> *-Outside of specification <br /> (l) 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 />