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E, Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petatuma.CA 94954 (707)79Z-186S FAX(707)792-0342 <br /> I ATC Associates,Inc. Project: SUSD/Corporation Yard Sampled: 2/23/99 to 2/24/99 <br /> 1117 Lone Palm Ave.,Suite B Project Number: na Received: 3/1/99 <br /> Modesto,CA 95351 Project Manager: Tom Lutterman Reported: 3/15199 <br /> 1 <br /> BTEX by 8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes' <br /> Matrix Spike Dup(continued) 9020581-MSDI P902494-01 <br /> I <br /> Surrogate: a,a,a-Trifluorotoluene 2/26/99 30000 33300 ug/kg /11 <br /> J{' Batch: 9030158 Date Prepared: 315/99 Extraction Method: EPA 5030 soils <br /> 1 ILw Blank 9030158-BLKI <br /> 1 <br /> Benzene 3/5/99 ND ug/kg 2.00 <br /> Toluene ND 2.00 ! <br /> Ethylbenzene " ND 2.00 <br /> Xylenes(total) ND 4.00 <br /> Surrogate: a,a,a-Trifluootorluene_ 300 282 94.0 <br /> Surrogate: 4-Bromofluorobenzene 300 267 89.0 a <br /> I <br /> Blank 9030158-BLK2 <br /> $enzene 3/9/99 ND ug/kg 1.00 <br /> 'uene ND 1.00 <br /> " Isyibenzene " ND " 1.00 ' <br /> Xylenes(total) __ _ ND 2.00 <br /> Surrogate: a,a,a-Trifluorotoluene � 300 � 297 99.0 <br /> LCS <br /> _ 9030158-BS1 <br /> i Benzene 315199 174 ug/kg <br /> Toluene 171 " <br /> Ethylbenzene 171 1 <br /> Xylenes(total) 514 <br /> Surrogate: a,a,a-Tris luorotoluene 300 305 102 <br /> LCS 9030158-BS2 <br /> Benzene 319/99 192 ug/kg <br /> Toluene 190 <br /> Ethylbenzene 189 " <br /> Xylenes(total) 570 " <br /> Surrogate: a,a,a-Trifluorotaluene 300 327 109 <br /> Matrix Spike 9030158-MSI P903097-03 <br /> Benzene 3/5/99 200 ND 192 ug/kg 96.0 <br /> Toluene 200 ND 189 94.5 I <br /> Ethylbenzene 200 ND 187 93.5 j <br /> Xylenes(total) 600 ND 568 94.7 _ <br /> Surrogate: a,a,a-Trifluorotoluene 300 329 110 <br /> i <br /> Matrix Suike Dun 9030158-MSDI P903097-03 I <br /> nzene 3/5/99 200 ND 189 ug/kg 94.5 1.57 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 21 of 28 r <br /> i <br />