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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(65 0)364 9233 <br /> 404 N Wigct Lane Walnut Creck CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �Ill� Analytical 819 Striker Avenuc Suite 8 Sacramento CA 95834 {916) 92I 4600 FAX (916}921 0100 <br /> EA Engineering Science &Tech Client Prol ID - Ewan 7-3942, 5153942 1300 Sampled 03/03/98 <br /> Mt Diablo Blvd Ste B100 Sample Descript MW10 Received 03/04/98 <br /> 13468 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/16/98 <br /> Attention Christa Marting Lab Number 9803305-09 _ Reported 03/31/98 <br />�C Batch Number GC031698BTEX21A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />'Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 2000 23000 <br /> Methyl t-Butyl Ether 100 940 <br /> Benzene 20 360 <br /> Toluene 20 7800 <br /> thyl Benzene 20 1300 <br /> lChromatogram <br /> ylenes (Total) 20 5000 <br /> Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Surrogates <br /> 70 130 106 <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> c 7,�� <br /> j*rd Heeling <br /> t Manager Page 18 <br /> 1 <br />