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1 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)986-9673 <br /> Analytical 14 Striker Avenue Suite 8 5etalum C 9 95834 (916)921 9600 FAX(916)923-0300 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 {707}792-1665 FAX(707)79z-0342 <br /> Gettier-Ryan-Sac Project Chevron 9-3232, Stockton,CA Sampled 10/29/98 to 10/30/98 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 346463 01 Received 10/30/98 <br /> Rancho Cordova,CA 95670 Project Manager Todd Del Fratc Reported 11/10/98, 11/13/98 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Datt, Surrogate Reporting <br /> Analyte Number Prepared Analysed Limits Lima Result Units Notes* <br /> MW-3-405(conbu� 5810352-29 SQ1 <br /> Surrogate a a a-Ti rfluorotoluene 3110061 11/5/98 11/5/93 600-140 990 % <br /> MW-3-49.5 5810352-31 Skd <br /> Purgeable hydrocarbons 8110084 11/6/98 11/9/98 Soo 52 6 mg/kg 1,D <br /> Benzene 00250 0 901 D <br /> Toluene 00250 00300 D <br /> Ethylbenzene 00250 0 580 D <br /> Xylenes(total) 00250 0 160 D <br /> Methyl tent-butyl ether 0 250 ND D <br /> Surrogate a a a-Trifluorotoluene 600-140 39 0 <br /> I <br /> Sequoia nalytical -Sacr imento *Refcr to end of r eport for text of notes and dcfrrertzons <br /> nda C Schneider,Laboratory Director Page 5 of 9 <br />