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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 ISI Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 %00 FAX (916) 921 0100 <br /> Blaine Tech Services Client Prol ID Shell Stockton/971202-L1 Sampled 12/02/97 <br />- 1680 Rogers Avenue Sample Descript Caltrans Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/16/97 <br /> Attention I=ran Thie_ Lab Number 9712358-02 Reported 12J19197 <br /> 6C Batch Number GC121697BTEX02A _ <br /> Instrument ID GCHP2 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/I_ ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene _ -- - 0 50 1 0 <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 101 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN ICAL - ELAP #1210 <br /> Peggy n <br /> Project Manager Page 6 <br />