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cbCurtis &Tompkins Ltd <br /> LABORATORY NUMBER: 112451 DATE SAMPLED: 09/23/93 <br /> CLIENT: ENVIRONMENTAL SCIENCE & ENGINEERING DATE RECEIVED: 09/24/93 <br /> PROJECT ID: 6-92-5009 DATE ANALYZED: 09/27/93 <br />' LOCATION: AT&T - LODI DATE REPORTED: 10/02/93 <br /> Benzene, Toluene, Ethyl Benzene, Xylenes by EPA 8020 <br /> Extraction by EPA 5030 Purge and Trap <br /> LAB ID CLIENT ID BENZENE TOLUENE ETHYL TOTAL REPORTING SURROGATE <br /> BENZENE XYLENES LIMIT RECOVERIES <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) TFT BFB <br />' 112451-001 MW-1 ND ND ND NO 0.5 98 X 80 X <br /> 112451-002 MW-2 ND ND ND ND 0.5 97 X 80 % <br /> 112451-003 Mw-3 ND ND NO ND 0.5 96 % 79 % <br />' 112451-004 M11-4 ND ND ND ND 0.5 97 % 78 % <br /> 112451-005 DUP ND ND ND ND 0.5 97 X 80 % <br /> METHOD BLANK N/A ND ND ND ND 0.5 100 X 83 % <br /> 1 <br /> 1 <br /> TFT = Trifluorotoluene (Limits: 58-130) <br />' BFB = Bromof luorobenzene (Limits: 62-131) <br /> ND = Not detected at or above reporting limit. <br />' Reporting Limit applies to all analytes. <br /> QA/QC-SUMMARY: <br /> --BS/BSD <br /> --===-- _____-____-_-_- _------------------__- <br /> RPD, <1 <br />' RECOVERY,%-.__________________________ 101--==---__--- <br /> I ' <br />