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Sequoia 680 Chesapeake Drive 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%73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prol ID - Shell Stockton/971202-1-1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descript RW-1A Received 12/03/97 , <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method =8015Mod/8020 Analyzed -12/.16/­97— <br /> Attention <br /> 12/_16/97Attention Fran Thie Lab Number 9712358-03 _ _ _ Reported 12J19197 - <br /> QC 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/L ug/L <br /> TPPH as Gas .. 25000 43000 <br /> Methyl t-Butyl Ether 1250 160000 <br /> Benzene .. 254 5100 <br /> Toluene 250 4000 <br /> Ethyl Benzene .. 250 850 <br /> Xylenes (Total) 250 4700 <br /> Chromatogram Pattern .. C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 104 <br /> Analytes reported as were not present above the stated limit of detection <br /> SEQUO A YT'CAL - ELAP #1210 <br /> Peggy ner <br /> Project Manager page 9 <br />