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i Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (9Z5)988 9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1 9600 FAX(916)911 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792 0342 <br /> Ground Zero Analysis, Inc Client Prod ID 96-163, Knowles Rock Sampled 08/19/98 <br /> 1714 Main St Sample Descrlpt KR Effluent Received 08/20/98 <br /> Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 08/22/98 <br /> Attention Justin Powers Lab Number 9808C27-02 Reported 08127198 <br /> ' QC Batch Number GC082298BTEX17A <br /> Instrument ID GCHP17 <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) 010 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> ' Tnfluorotoluene 70 130 95 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ISEQUOIAANALIMCAL - ELAP #1210 <br /> r <br /> 1 f &� <br /> sect Manager Page 2 <br />