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680 Chesapeake Drive Redwood Clty,.CA 94063 ) { ) <br /> Sequoia 404 N.Wiet Lane (650 364-9600 'FAX 650 364-9233 <br /> S Walnut Creek.CA 94598 {925)988-9600 FAX'(925)988-967,3 Analytical 819 Striker Avenue.Suite 8 Sacramento.CA 95634 (916)921-9600 1455 FAX(9161 921-0100 <br /> 111cDowelf.Blvd.North,Ste.D f etafuma,CA 94954 (707)792-1865 FAX(707)792-0342 i <br /> F <br /> nnacle-C.P. Project: ARCO,S4G9,Stockton CA39 Cambridge Road,Ste. 220 Sampled: 2/]7/99 <br /> Project Number: NIA 'Received: 2/17/99 <br /> meron Park,CA 95682 Project Manager: Mark Capps <br /> Reported: 2/25,3/3/99 <br /> Total Purgeable Hydrocarbons(C6-02) and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento I <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> 20202I <br /> :Ethylbenzene <br /> 2/19/99 0.200 0.196 mg/kg 70.0-130 98.0 <br /> Xylenes(total} 0.600 0.587 70.0-130 97.8 <br /> ,surrogate: a,a,a-Trifluorololuene _0.200 0.18! " <br /> 60.0-140 90.5. <br /> 24�Q2-96-M51 <br /> S202236-011 <br /> .Benzene 2/19/99 0.200 ND 0.160 mg/kg 60.0-140 80.0- <br /> Toluene 0.200 ND 0.163 " <br /> Ethylbenzene 60,0-140 81.5 <br /> 0.200 ND 0.166 60.0-140 83.0 <br /> Xylenes{Lata]) ' 0.600 ND 0.504 60.0-140 84.0• <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.187 <br /> 60.0-140 93.5 <br /> Matrix-Spike DLLp 2029246-MSDI 5902236-01 <br /> Benzene 2119/99 0.200 ND 0.161 m /k <br /> $ g G0.0-140 80.5 25.0 0.623 <br /> Toluene 0.200 `ND _ 0.158 60.0-140 79.0 25.0 3.12 <br /> Ethylbenzene 0.200 ND 0.166 60.0-140 83.0 25.0 0 <br /> Xylenes.{total) " 0.600 ND 0,501 600-140 835 25.0 0.597 <br /> Surrogate: a,a,a-Tri . . <br /> uorotoluene 0.100 0187 60, 140 93. <br /> a <br /> ietuoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br />,ortald W_ Bobel,Client Services Representative <br /> I Page 6 of 9 <br /> ;. <br />