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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 FAX(925)988 9673 <br /> ' frill' Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd forth Ste D Petaluma CA 94954 (707)79Z 1865 FAX(707)792 0342 <br /> Ground Zero Analysis, Inc Client Prol ID 96-163, Knowles Rock Sampled 08/19/98 <br /> ' 1714 Main St Sample Descrlpt KR Influent 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 9808C27-01 Reported 08127198 <br /> 'QC Batch Number GCO82298BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> ' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> ' TPPH as Gas 1000 2000 <br /> Benzene 10 82 <br /> Toluene 10 170 <br /> Ethyl Benzene 10 130 <br /> ' Xylenes (Total) 10 1100 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> ' Trifluorotoluene 70 130 107 <br /> RECEIVED <br /> ' SEP - 4 1998 <br /> ADs'd....-_------ <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 'SEQUOIA ANALYTICAL - -ELAP 01210 <br /> Ject Manager Page <br /> 1 <br />