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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Swte 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> fa <br /> Enviros Client Prol ID Shell 620 W Charter Way Sampled 04/18/96 <br /> 270 Perkins Ave Sample Descript Influent Air Received 04/19/96 <br /> Sonoma, CA 95476 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 04/19/96 <br /> Attention M Donohue Lab Number 9604D34-02 Reported 04123196 <br /> QC Batch Number GC041996BTEX17A <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 _ 200 <br /> Benzene 0 31 N D <br /> Toluene 027 N D <br /> Ethyl Benzene 023 N D <br /> Xylenes (Total) 023 N D <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 1320 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41214 <br /> A01k 1'100�4111�' <br /> RIM Gregory <br /> _ iject Manager Page 2 <br />