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Sequoia 680 Chesapeake Dnve Redwood Cty,CA 94 (650) 364-9600 FAX(650)3640233 <br /> 0 404 N Wiget lane Walnut Creek,CA 94 (510) 988 9600 FAX(510)9813 9673 <br /> �I Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prod ID Shell Stockton/971121-G1 Sampled 11/21/97 <br /> 1680 Rogers Avenue Sample Descript Dup Received 11/24/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> = Analysis Method 8415Mod/8020 Analyzed 12/05/97 <br /> Attention Fran Thle Lab Number 9711 E95-05 _ Reported 01 J14198 <br /> QC Batch Number GC120597BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether - - - 25 - 99 <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 1 6 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN l - ELAP -1 <br /> Peggy Penner <br /> Project Manager Page 15 <br />