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I Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wsget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue Suite a Sacramento CA 95834 (916) 921 9600 FAX (9t6) 921 4[00 <br /> i <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-3942 / 8373942 1307 Sampled 02/13/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript RW2 Received 02/14/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/16/96 <br /> Attention Tracy Faulkner Lab Number 9602A05-17 Reported 02J23J96 <br />,QC Batch Number GCO21696BTEX21A <br /> Instrument lD GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 2000 11000 <br /> Benzene 20 170 <br /> Toluene 20 370 <br /> Ethyl Benzene 20 400 <br /> Xylenes (Total) 20 1100 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br />' Trifluorotoluene 70 130 68 <br /> Analytes reported as N D were not present above the stated fim1t of detection <br />' SEQUOIA ANALYTICAL - ELAP 01210 <br /> in Follett <br /> Ject Manager Page 17 <br />