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k <br /> E' <br /> 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 /> _AQV Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> =ATCAssociates,Inc. Project: SUSD/Corporation Yard Sampled: 2/23/99 to 2/24/99 <br /> lm Ave.,Suite B Project Number: na Received: 3/1/99 <br /> 95351 Project Manager: Tom Lutterman Reported: 3/15199 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control I <br /> i <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample P p QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Linut % Notes* <br /> Batch: 9030158 Date Prepared: 3/5/99 Extraction Method: EPA 5030 soils <br /> Blank9030158 BLKI- 1 <br /> , <br /> Gasoline 3/5199 ND ug/kg 400 <br /> Benzene ND 2.00 <br /> i Toluene ND 2.00 <br /> Ethylbenzene " ND " 2.00 <br /> Xylenes(total) _ _ _ _ " ND 4.00 _ <br /> Surrogate.' a,a,a-Truorotoluene 300 182 94.0 i <br /> Surrogate.- 4-Bromofluorobenzene 300 267 <br /> 89.0 <br /> LCS 9030158-BSI <br /> Benzene 3/5199 174 ug/kg <br /> Toluene 171 " <br /> .Ethylbenzene " 171 " <br /> enes(total) _ 514 " <br /> arrogate: a,a,a-Trifluorotoluen_e300 305 102 <br /> i <br /> Matrix Spike 9030158-MS1 P903097-03 <br /> Benzene 3/5/99 200 ND 192 ug/kg 96.0 <br /> Toluene 200 ND 189 94.5 <br /> Ethylbenzene 200 ND 187 93.5 <br /> _Xylenes(total) 600 ND 568 _ 94.7 <br /> Surrogate: a,a,a-Trifluorotoluene 300 329 110 <br /> Matrix Spike Dup 9030158-MSD1 P903097-03 <br /> J Benzene 3/5/99 200 ND 189 ug/kg 94.5 1.57 <br /> r Toluene 200 ND 187 93.5 1.06 <br /> Ethylbenzene 200 ND 186 93.0 0.536 <br /> x <br /> Xylenes(total) 600 ND 564 94.0 0.742 <br /> Surrogate: a,a,a-Trifluorotoluene 300 323 108 <br /> i <br /> Batch: 9030195 Date Prepared: 3/9/99 Extraction Method: EPA 5030 soils ; <br /> Blank 9030195-BLKI <br /> Gasoline 3/9/99 ND ug/kg 400 G <br /> Benzene ND 2.00 F <br /> Toluene ND 2.00 j <br /> Ethylbenzene ND 2.00 <br /> Xylenes(total) ND 4.00 _ <br /> Surrogate: a,a,a-Trifluorotoluene 300 594 198 <br /> Surrogate: 4-Bromofluorobenzene 300 272 90.7 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 17 of 28 <br />