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' Sequoia 680 Chesapeake Dnvc Redwood CIW CA 94063 (413) 304 9600 FAX (415) 364 9233 <br /> (900 Baccs Suite L Concord CA 94520 1310) 030 9600 FAX (510) 636 9689 <br /> Analytical 519 Sinker Avenue Since 5 SaCr3Mtni0 CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> EA Engineering Science &Tech- 'w—Client Prol ID 83739421307, Exxon 7-3942 - Sampled 02/17/95 <br />' 3468 Mt Diablo Blvd Ste B100 Sample Descript Trip Blank Received 02/21/95 Y <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/22/95 - <br /> Attention M Cravink __--.---.-Lab Number 9502C36-01- _ _ Reported 02f27/95_ <br /> QC Batch Number 6CO22295BTEX01A- - - ----- -- -- ---- -- �~ -~ _ --- ~ - - __ - <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br />' Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 97 <br /> 1 <br /> 1 <br />'Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA L ICAL - ELAP #1210 <br /> zanne Chin <br /> Project Manager Page 1 <br /> 1 <br />