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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)98$-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 455 McDowell Blvd North Ste D Petaluma CA 9494 (707)792 1865 FAX(707) 2-0342 <br /> Analytical ',551 <br /> 1SS1 Industrial Mal Road San Carlos CA 94070-4111 (650)232-960D FAX(650)23232-9612 <br /> Pinnacle-C P Project ARCO 6020,Manteca,CA Sampled 517199 to SI l 1199 <br /> 3939 Cambridge Road,Ste 220 Project Number NIA Received 5112/99 <br /> Cameron Park,CA 95682 Pro ect Manager Joel Coffman Reported 5127/99 <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 Notes* <br /> T-3-S(IT)(continued) 5905178-05 5931 <br /> Surrogate I2-DCA-d4 600-140 868 <br /> D-3 (T S905178-06 5911 <br /> Tert-butyl alcohol 9050173 5/14/99 5/18199 100 ND mg/kg <br /> Methyl tert-butyl ether 0 100 ND <br /> Di-isopropyl ether 0 100 ND <br /> Ethyl tent-butyl ether 0 100 ND <br /> Tert-amyl methyl ether 0 100 ND <br /> Surrogate 12-DCA-d4 _ 600-140 908 % _ <br /> PL-114.5') 5908178-07 5911 - <br /> Tert-butyl alcohol 9050173 5114/99 5118/99 100 ND mg/kg <br /> Methyl tert-butyl ether- - - - 0 100 ND <br /> DI-isopropyl ether 0 100 ND <br /> Ethyl tert-butyl ether 0 100 ND <br /> Tert-amyl methyl ether 0 100 ND <br /> Surrogate 1 2-DCA-d4 �-- -- - --' - — - - 60 0-140 ----_-- - 912 % <br />.� <br /> D-6(6.5.)- ______ - - - -- ---- - — — - --5905178-08 <br /> Tert-butyl alcohol - - - 9050173 __5/14/99 __ 5118/99 _ 100 ND mg/kg <br /> Methyi tort-butyl ether 0 100 0204 <br /> DI-isopropyl ether 0 100 ND <br /> Ethyl tert-butyl ether 0 100 ND <br /> Tert-amyl methyl ether 0 100 ND <br /> Surrogate 1 2-DCA-d4 600-140 876 <br /> D-2(6.5') 5905178-09 5911 <br /> Tert-butyl alcohol 9050173 5/14199 5/18199 100 ND mg/kg <br /> Methyl tert-butyl ether 0 100 ND <br /> Di-isopropyl ether 0 100 ND <br /> Ethyl tert-butyl ether 0 100 ND <br /> Tert-amyl methyl ether 0 100 ND <br /> Surrogate 1 2-DCA-d4 600-140 86 4 % <br /> Sequoia Analytical-Sacramento "Refer to end of report for test of notes and definittons <br /> Ronald W Bobel,Client Services Representative Page 6 of 10 e <br />