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� Lancaster <br /> Analysis nalys►s Repor# <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425 Tri 656-2300 Fax 717 656-2681 www lancasterlabs com <br /> Page 6 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 918531 <br /> Reported 11/11/04 at 06 35 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC $AEC Limits RPD MAX coria Coric RPD Max <br /> Freon 113 129 128 73-166 1 30 <br /> Batch number Z043131AA Sample number(s) 4391328,4391331-4391333 <br /> Methyl Tertiary Butyl Ether 97 98 69-134 1 30 <br /> Benzene 99 99 83-128 1 30 <br /> Toluene 102 101 83-127 1 30 <br /> Ethylbenzene 103 103 82-129 0 30 <br /> Xylene (Total) 100 100 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TCL SW846 Semivolatiles/Waters <br /> Batch number 04304NAH026 <br /> 2-Fluorophenol Phenol-d6 2 4,6-Tribromophenol Nitrobenzene-d5 <br /> 4391329 57 36 91 89 <br /> Blank 55 35 a6 84 <br /> LCS 64 42 99 94 <br /> LCSD 60 39 99 98 <br /> Limits 22-91 10-80 43-145 54-124 <br /> 2-Fluorobiphenyl Terphenyl-d14 <br /> 4391329 90 89 <br /> Blank 79 97 <br /> LCS 89 113 <br /> LCSD 91 103 <br /> Limits 64-112 48-125 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04307AS3A <br /> Trifluorotoluene-F <br /> 4391328 94 <br /> 4391329 98 <br /> 4391331 99 <br /> 4391332 103 <br /> Blank 96 <br /> LCS 102 <br /> LCSD 99 <br /> MS 89 <br /> Limits 57-146 <br /> Analysis Name TPH-GRQ - Waters <br /> Batch number 04307A53B <br /> Trifluorotoluene-F <br /> 4391333 96 <br /> Blank 94 <br /> *-Outside of specification <br /> (1) 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 />