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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 rAX(925)988 9673 <br /> 819 Striker Avenue Suite B Sacramento CA 95834 916)921-9600 FAX(916)921-0100 <br /> ' Analytical 1455 McDowell Blvd North Ste D Petaluma.CA t-CS`%J 707)792 1865 FAX(707)79Z-0342 <br /> EL-�11iM�N�twR-r <br /> Ground Zero Analysis, Inc Client Prod ID 96-163/Knowles Roek Sampled 10/26/98 <br /> 1714 Main St Sample Descript KR Influ Received 10/27/98 <br /> ' Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 10/27/98 <br /> Attention Greg Stahl Lab Number 9810110-01 Reported 10J30J98 <br /> �QC Batch Number GC102798BTEX02A <br /> Instrument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> ' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> ' TPPH as Gas 100 1400 <br /> Benzene 1 0 N D <br /> Toluene 1 0 5 4 <br /> Ethyl Benzene 1 0 11 <br /> Xylenes (Total) 1 0 100 <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> ' Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 224 Q <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 'SEQUOIA ANALYTICAL - ELAP #1210 <br /> Oct Manager Page 1 <br /> 1 <br />