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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ."� 1 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916 )921 -0100 <br /> ' 1455 McDowell Blvd North Ste D Petaluma,CA 94954 707 792-1865 FAX 707 792-0342 <br /> 1p - --- -- -- - - - - <br /> Ground Zero Analysts, Inc Client Prol ID 96-163 Knowles Rock-- <br /> _ µ Sampled 01/18/99 <br /> 1714 Main St Sample Descript KR Efflu Received 01/19/99 <br /> ' Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 01/21/99 <br /> „ Attention Greg Stahl Lab Number 9901867-02 Reported 02101199 ; <br /> C Batch Number GCO12199BTEX30A <br /> nstrument ID GCHP30 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10 N D <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 N D <br /> Xylenes (Total) 0 10 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> 'Trifluorotoluene 70 130 87 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> z <br /> 19ct Maager page 2 <br />