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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 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 /> Blaine Tech Services Client Proj ID Shell Stockton 980129-S1 Sampled 01/29/98 <br /> 1680 Rogers Avenue Sample Descnpt Caltrans Received 01/30/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/05/98 <br /> Attention Fran Thie Lab Number 9801 H81-08 Reported 02J12198 <br /> QC Batch Number GCO20598STEX02A <br /> Instrument ID GCHP2 <br /> Analyte Detection Limit Sample Results <br /> ug/L 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 50 072 <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Tnfluorotoluene 70 130 114 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A AL - ELAP #1271 <br /> Allikk <br /> gy Penner <br /> Project Manager Page 24 <br />