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Lancasterort <br /> Laboratories Analysis Re 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 8 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 882770 <br /> Reported 02/12%04 at 06-16—PM <br /> Sample Matrix Quality Control <br /> NISMSD MS/MSD RPD- - BKG DUP DUP-- DUP <br /> RPD <br /> Analysis Name %REC —%REC -Limits -- RPD - MAX - Conc Conc RPD Ma; <br /> Batch number P040301AA Sample number(.) 4205540,4205543-4205545 <br /> Methyl Tertiary Butyl Ether 99 99 69-134 0 30 <br /> Benzene 102 102 83-128 0 30 <br /> Toluene 98 100 83-127 2 30 <br /> - - Ethylbenzene- - 100 101 - 82-129 _ 1 _ __30 <br /> Xylene (Total) 98 99 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (Waters) <br /> Batch number 040290023A <br /> Orthoterphenyl <br /> 4205541 100 <br /> 4205543 97 <br /> 4205544 92 <br /> 4205545 84 <br /> Blank 88 . <br /> LC$ 106 <br /> LCSD 96 <br /> Limits 59-139 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0403OA07A <br /> -=Trifluorotoluene-F===- <br /> 4205541 78 <br /> ---Blank_`--80— ' - - -- -— - - _ - - — ---- - -- ----- - -- — <br /> LCS 100 <br /> NIS _ 102 <br /> MSD 104 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO waters <br /> Batch number 0403OA07C <br /> Trifluorotoluene-F <br /> 4205540 77 <br /> Blank 76 <br /> LCS 100 <br /> MS 102 <br /> MSD 104 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0403DA08A <br /> Trifluorotoluene-F <br /> 4205545 127 <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 />