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n� Y <br /> Sequoia680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct 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 /> Enviros Client Prol ID Shell 620 W Charter Way Sampled 04/18/96 <br /> 270 Perkins Ave Sample Descrlpt Effluent 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 9604D34-01 Reported 04j23196 <br /> CC Batch Number GC041996BTEX17A - <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ppmv ppm <br /> TPPH as Gas .. 28 34 <br /> Benzene 0 031 ND <br /> Toluene 0 027 N D <br /> Ethyl Benzene 0 023 N D <br /> Xylenes (Total) 0 023 N D <br /> Chromatogram Pattern .. C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 102 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> e Gregory <br /> elect Manager Page 1 <br />