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Ae Lancaster <br />Laboratories <br />Quality Control Surmnary <br />' Client Name ChevronTexaco Group Number 839081 <br />Reported 01/31/03 at 03 56 PM <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BKG DUP <br />Malvsis Name '%REC %REC Limits RPD MU Conc Conc <br />Toluene 113 113 83-127 0 30 <br />' 1,2-Dibromoethane 84 84 7B-120 1 30 <br />Ethylbenzene 113 112 82-134 0 30 <br />Xylene (Total) 112 111 82-130 1 30 <br />1 Surrogate Quality Control <br />' Analysis Name TPH-GRO - Waters <br />Batch number 03025A07C <br />Trifluorotoluene-F <br />Blank 95 <br />' LCS 109 <br />LCSD 109 <br />MS 116 <br />�mxts 57-146 <br />' alysis Name Methanol and Ethanal <br />Batch number 030280003A <br />Acetone <br />3983539 97 <br />3983590 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 03028A07A <br />Trifluorotoluene-F <br />Page 2 of 3 <br />DUP Dup <br />RPD <br />RPD Max <br />' *- Outside of specification <br />1) The result for one or both determinations was less than five times the LOQ <br />1 ) The background result was more than four times the spike added <br />3983539 <br />93 <br />2425 New Holland Pike PO Box 12425 <br />PA 1760-4-2425 <br />Blank <br />95 <br />LCS <br />111 <br />LCSD <br />113 <br />MS <br />113 <br />' <br />Limits <br />57-146 <br />Analysis <br />Name TPH-GRO - Waters <br />Batch number 0302BA07B <br />Trlfluorotoluene-F <br />3983540 <br />90 <br />' *- Outside of specification <br />1) The result for one or both determinations was less than five times the LOQ <br />1 ) The background result was more than four times the spike added <br />2216 Rev 1012/02 <br />Lancaster Laboratories, Inc <br />M ' F- iM B B R <br />®Lancaster <br />2425 New Holland Pike PO Box 12425 <br />PA 1760-4-2425 <br />717-656-2300 Fax 7177-656-2581 <br />2216 Rev 1012/02 <br />