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14 T) Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 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 Prol ID Shell Stockton/970709-Fl Sampled 07/09/97 <br /> 1580 Rogers Avenue Sample Descript VEW-4 Received 07/10/97 <br /> San Jose, CA 95112 Matrix LIQUID _ <br /> Analysis Method 8015Mod/8020 Analyzed 07/16/97 _ <br /> Attention Fran Thie Lab Number 9707592-11 Reported 07123J97 <br /> OC Batch Numbe-r"GC071697BTEX21A <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 .. 26 .. 10 <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 99 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANAL CAL - ELAP #1210 <br /> mk <br /> P y Penn <br /> Project Manager Page 12 <br />