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' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> Sequoia <br /> 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 (9t6)921-9600 FAX(916)921-0100 <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 Roek Sampled 10/26/98 <br /> 1714 Main St Sample Descript KR Efflu Received 10/27/98 <br /> Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 10/28/98 <br /> Attention Greg Stahl Lab Number 9810110-02 Reported 10f30f98 <br /> C Batch Number GC10289BBTEX30A <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 Oil <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 /> ' Trifluorotoluene 70 130 109 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> Oict Manager Page 2 <br /> I <br />