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•� M <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wigec Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> 4D— 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92 1 9600 FAX(916)92 t 0100 <br /> Analytical i455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> 1551 Industnaf Road San Carlos CA 94070 41 1 1 (650) 232 9600 FAX(650) 232 961 Z <br /> 1� <br /> Enicon-Pinnacle Project Arco 2168,Stockton, CA Sampled 2/17/99 to 2/18/99 <br /> 3939 Cambridge Road, Ste 202 Project Number 21775-234 004 Received 2/18/99 <br /> Cameron Park,CA 95652 Project Manager Dave Foley Reported 3/4/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units <br /> Notes* <br /> MW-L« X274-01 ater <br /> Tert-butyl alcohol 9020259 2123/99 2123199 200 ND ug/1 <br /> Methyl tett-butyl ether 200 23 8 " <br /> Dr-isopropyl ether 200 686 " <br /> Ethyl tert-butyl ether 2 00 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1,2-DCA-d4 600-140 996 % <br /> MW-21521 S90227g-U <br /> Tetalcohol 9020259 2/23/99 2/23/99 200 ND ug/1 <br /> Wate <br /> Methylthyltee tt-butyl ether 200 ND " <br /> DI-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 2 00 ND " <br /> gate 12-DCA-d4 600-140 114 % <br /> M)Y-3 (53) 5902274-03 <br /> Tert-butyl alcoholAate <br /> 9020259 2/23/99 2123/99 200 ND ug/I <br /> Viethyl tert-butyl ether 200 8 46 " <br />:)i-isopropyl ether 200 ND " <br /> ethyl tert-butyl ether 200 ND <br /> Cert-amyl methyl ether 200 ND " <br /> surrogate 1,2-DCA-d4 600-140 102 % <br /> 4W-4 <br /> (58 <br /> ertutyl alcohol SIOZZ 4=04 Wate <br />+]ethyl r <br />' 2/23/99 2/23/99 200 ND ug/1 <br /> yl to art-butyl ether 9020259 " <br />)i-Isopropyl ether 200 666 <br /> 00 ND " <br /> thy/tert-butyl ether 2 00 ND " <br /> ert-amyl methyl ether 2 00 ND " <br /> urrogate 1 2-DCA-d4 0, 600-140 106 % <br /> 1w=3(5Q S902-,)74-05 Nater <br /> ert-butyl alcohol 9020259 2/23/99 2/23/99 200 ND ug/l <br />[ethyl tert-butyl ether 2 00 ND " <br /> i-isopropyl ether 2 00 ND <br /> thyl tert-butyl ether 2 00 ND <br />:rt-amyl methyl ether <br /> 200 ND " <br /> q Analytical-Sacramento *Refer to end of report for text of notes and definitions <br />>'nald W Bobel,Client Services Representative Page 4 of 10 <br />