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i A. — <br /> r <br /> hesapeake Drive y y �a FAX(650)364-9233 <br /> C <br /> 1 equ Redwood City,CA 94063 (G5o}364-9600 <br /> Sequoia <br /> ® 404 N.tget Lane Walnut Creek,CA 9459$ (925)988-9600 FAX(925)988- <br /> Sacramento,CA 9 <br /> 819 Striker Avenue,Suite 8 1()o <br /> 5834 (916)921-9600 FAX(9 16)921-0000 <br /> Anal.yukai 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707) 792-1865 <br /> FAX(707)"192-0342 <br /> f 55 t Industrial Read <br /> San Carlos:CA.94070-41 1 1 (650)232-9600 FAX(6 501 232-9612 <br /> Pinnacle-C.P. Project: ARCO,5469, Stockton CA <br /> 3939 Cambridge e Road,Ste.220 Sampled: 211 1/99 <br /> g Project Number: N/A Received: 2/12/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps <br /> .Reported: 311/99 <br /> l <br /> Volatile Organic Campounds.by EPA Method 8260kQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. ID::�R-�=PDAnalyzed Level ResultResult tJriits Recov. Limits /a L0 <br /> B1anl. Date-Prepared:2117199 <br /> ' �020206�BI.Kt Qm, <br /> Ethanol 2/17199 <br /> .,Tert-butyl alcohol ND mgl g I50 <br /> r <br /> ND 100 <br /> ,:Methyl tert-butyl ether ND O.I ,0 <br /> r . <br /> Di-isopropyl ether ND 0-100 <br /> Ethyl tent-butyl ether ND 0.100 <br /> Tert-amyl methyl ether ND 0.100 <br /> 'Surrogate: 1,2-DCA-d4 2.50 1.5660.0-140 /02 <br /> 'FSS 4 20206-$�1 ; <br /> Methyl tert-butyl ether 2117/99 2.50 2.48 mg/kg 70-0-130 99.2 <br /> .Surrogate.- 1,2-DCA-d4 2.50 2.60 60.0-140 104 <br /> Matrix SpiEce 4t1Z0206 MSl S902174-01 <br /> Methyl tert-butyl ether 2/17/99 2.50 0.731 2.86 mg/kg 60.0-140 85.2 <br /> 'Surrogate: 1,2-DCA-d4 1.50 2.•33 60.0-140 93.2 <br /> Matrix Spfke Duo 9020206-MSDI S902174-01 ' <br /> Methyl tert-butyl ether . 2/17/99 2.50 0.731 .3.07 mg/kg 60.0-140 93.6 25.0 9.40 <br /> Surrogate: 1,2-DCA-d4 2.50 2.-35 .60.0-140 94.0 <br /> i <br /> Sequoia Analytical-Sacramento "Refer to end of report for text of notes and definitions. <br /> Ronald W. Bobel,Client Services Representative Page 14.of 15 E <br /> 1 <br />