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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 7 404 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 707 791-1865 FAX 707 792-0342 <br /> Ground Zero Analysis, Inc Client Prol ID 96-163 Knowles Rock Sampled 01/18/99 <br /> 1714 Main St Sample Descrlpt KR Influ 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 9901867-01 Reported 02JO1199 <br /> tC Batch Number GCO121996TEX03A <br /> strument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> 1 Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> tTPPH as Gas 25 420 <br /> Benzene 025 N D <br /> Toluene 0 25 1 9 <br /> Ethyl Benzene 025 32 <br /> Xylenes (Total) 0 25 30 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> 'Trifluorotoluene 70 130 102 <br /> RECE}VEU <br /> �E6 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIAANAL"CAL - ELAP #1210 <br /> v' <br /> loct Manager Pae 1 <br /> s <br />