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Sequoia 680 Chesamkc Drive Redwood City CA*.0163 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Waltwt Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Illip <br /> URS Greiner,Inc.-SF Project: Stockton-USPS Sampled: 7/7/98 to 7/8/98 <br /> 100 California Street,Ste.500 Project Number: 43-66600.32 Received: 7/10/98 <br /> San Francisco,CA 94111 Project Manager: Chris Nelson Reported: 7/28/98 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> IAnalyte Number Prepared Analyzed Limits Limit Result Units Notes' <br /> gl S807129-00 Sail <br /> Purgeable Hydrocarbons 8070260 7/20/98 7/20/98 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Surrogate: a,a,a-Tri,Jluorotoluene 60.0-140 105 % <br /> g2 S807129-01 Sail <br /> Purgeable Hydrocarbons 8070261 7/21/98 7/21/98 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND <br /> Xylenes(total) 0.00500 ND " <br /> Surrogate: a,a,a-Triiluororoluene 60.0-140 105 % <br /> B_j S807128-02 Sall <br /> Purgeable Hydrocarbons 8070261 7/21/98 7/21/98 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND <br /> Xylenes(total) 0.00500 ND " <br /> Surrogate. a,a,a-Triuorotoluene 60.0-140 108 % <br /> BA S807129-03 Sall <br /> Purgeable Hydrocarbons 8070261 7/21/98 7/21/98 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Surrogate.: a,a,a-Triiluorotoluene , 60.0-140 106 % <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> /Lifida C.Schneider,Laboratory Director Page 2 of 9 <br />