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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> �� ry' •, 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> low <br /> Enviros Client Prol ID Shell 620 W Charter,Stockton Sampled 11/07/96 <br /> 270 Perkins Ave Sample Descript Influent Air Received 11/08/96 <br /> Sonoma, CA 95476 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 11/10/96 <br /> Attention Matt Donohue Lab Number 9611429-02 Reported 11J12J96 <br /> QC Batch Number GC1 11 096BTEX1 7A <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ppmv ppmv <br /> TPPH as Gas 28 40 <br /> Benzene 0 031 0 038 <br /> Toluene 0 027 N D <br /> Ethyl Benzene .. 0 023 Oil <br /> Xylenes (Total) 0 023 037 <br /> Chromatogram Pattern _ C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 183 Q <br /> 0 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> Aory Page 2 <br />