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L Chesapeake Drive <br /> 1 <br /> Sequoia ' <br /> Redwood C City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ® 404 N.eget Lane Walnut Creek,CA 94598 (925)988-c9600 <br /> _ )- 1 $19 Striker Avenue,Suite 8 FAX(9251 988-9673 <br /> Iwo <br /> Sacramento,CA 95$34 (91 G)921-9600 FAX(g!G)92]-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste. D l'etaluma,'CA 94954 (707) 792-1865 <br /> 1551 Industrial RoadFAX(707) 792-0342 <br /> San Carlos,CA 940 70-4 1 11 (650)23Z-9600 `FAX(650)232-9612 <br /> Pinnacle C.P. Project: ARCO, 5469,Stockton CA' <br /> 3939 Cambridge Road,Ste. 220 Sampled: 2/l[199 <br /> g Project Number: NIA Received: 2/12/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps <br /> Reported: 3/1/99 <br /> Total: Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LU)FT/Quality Control: <br /> Sequoia Analytical-Sacramento. <br /> Date Spike Sample QC. Reporting Limit Recov. RPD <br /> Analyte Analyzed Leve[ Result Result Units Recov. Limits % Limit �% Notes* <br /> Ethyl benzene <br /> 2/16/99 <br /> 0.200 <br /> Xylenes(total) „ 0:183 mg/kg 70.0-130 91.5 <br /> 0.600 0.:559 70.0-130 93.2 <br /> ;Surrogate: a,a,a-Trifluorotoluene 0.200 0.183 <br /> 60.0-140 91.5 <br /> Spikc 29�Q1$7s1S1 S902I Z4 <br /> Benzene 2/16/99 0.200 ND <br /> :Toluene 0.160 mg/kg 60.0-140 80.0 <br /> 0.200 ND ' 0.'166 <br /> ' 60.0 140 83.0 <br /> �Ethylbenzene 0.200 ND 0.170 " <br /> Xylenes(total) 60.0-140 85.0 <br /> 0.600 ND 0.511 60.0-140 85.2 <br /> Surrogate.: a,a,a-Trifluorotoluene 0100 0180 <br /> 60.0-140 90<0 ' <br /> MSM 5902]71_0i <br /> Matrix Spjk�-DUD <br /> Benzene 2/16/99 . 0.200 ND 0.158 m /k <br /> Toluene g a° 60.0-140 79.0 25.0 1.26' <br /> 0.200 ND 0.164 60.0-140 8.2.0 25.0 1.21 <br /> Ethylbenzene 0.200. ND 0.167 " <br /> Xylenes(total) 60.0-140 83.5 25.0 1.78 <br /> 0 00 ND 0.5 <br /> Surrogate: a,a,d-Tr�uororoluene 0.12 00 0.1822 60.0-140 83.5 25.0 2.02 <br /> 60.0-140 .91.0 <br /> iequoia Analytics[-Sacramento <br /> *Refer to end of report for text of notes and definitions. <br />:onald W. Bob 1,Client ServicesRepresents ive <br /> czy Page 12 of 15 <br />