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*q q <br />• <br />Lancaster <br />Laboratories <br />Page 2 of 3 <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 839081 <br />Reported 01/31/03 at 03 56 PM <br />Sample Matrix Quality Control <br />Surrogate Quality Control <br />Analysis Name TPH-GRO - Waters <br />Batch number 03025A07C <br />Trifluorotoluene-F <br />3963543 <br />MS <br />MSD <br />MS/MSD <br />LCS <br />RPD BKO DUP DUP <br />Dup <br />109 <br />MS <br />116 <br />RPD <br />Analysis Name <br />'%REC <br />%REC <br />Limits <br />RPD <br />MAX Conc Conc RPD <br />Max <br />Toluene <br />113 <br />113 <br />83-127 <br />0 <br />30 <br />1,2-Dibromoethane <br />84 <br />84 <br />78-120 <br />1 <br />30 <br />Ethylbenzene <br />113 <br />112 <br />82-134 <br />0 <br />30 <br />Xylene (Total) <br />112 <br />111 <br />82-130 <br />1 <br />30 <br />Surrogate Quality Control <br />Analysis Name TPH-GRO - Waters <br />Batch number 03025A07C <br />Trifluorotoluene-F <br />3963543 <br />92 <br />Blank <br />95 <br />LCS <br />109 <br />LCSD <br />109 <br />MS <br />116 <br />Cs 7'/-19b <br />is Name Methanol and Ethanol <br />number 030280003A <br />Acetone <br />3983540 99 <br />3983541 100 <br />3983542 100 <br />Blank 99 <br />LCS 100 <br />MS 97 <br />MSD 98 <br />Limits 72-128 <br />Analysis Name TPH-GRO - Waters <br />Batch number 0302BA07A <br />Trifluorotoluene-F <br />3983539 93 <br />Blank 95 <br />LCS 111 <br />LCSD 113 <br />Ms 113 <br />a 5/ - <br />Analysis Name TPH-GRO - Waters <br />Batch number 03028AO78 <br />Trifluorotoluene-F <br />0 <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 />Lancaster laboratories, Inc <br />M E M B IS R 2425 New Holland Pike <br />PO Box 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax 717-656-2681 2216 Rey 10/2102 <br />