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4D Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> q1W Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Technical Services Client Prol ID 940816-Z1,Chevron, S221-5 Sampled 08/16/94 <br /> 985 Timothy Drive Sample Descript MW-2 Received 08/18/94 <br /> San Jose, CA 95133 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/22/94 <br /> Attention Jim Keller Lab Number 94081391-02 Reported 08J24194 <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 0 50 N D <br /> Toluene 050 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 78 <br /> i <br /> Analytes reported as IN D were not present above the stated limct of detection <br /> SEOUOIA ANA YTICAL - ELAP #1210 <br /> rine Chin <br /> Project Manager Page 2 <br />