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I <br /> 819 Striker Avenue,Suite 8 <br /> S e qu O l a Sacramento,CA 95834 <br /> /� (916)921-9600 <br /> TO <br /> Analytical <br /> `ical FAX(916)921-0100 <br /> Espana Geotechnical Consulting Project: Hammer Lane Sampled: 10/14/99 <br /> 502 Guiseppe Court,Ste. 11 Project Number' N/A Received: 10/15/99 <br /> Roseville,CA 95678 Project Manager: Mike Wilson Reported: 10/29/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD_ RPD <br /> IAnalyte Analvzed Level Result Result Units Recov.Limits % Limit % Notes' <br /> Batch: 9100256 Date Prenared: 10/20/99 Extraction Method: EPA 5030B(NIeOH) <br /> Blank 9100256-BLK1 <br /> Purgeable Hydrocarbons 10/20/99 ND mg/kg 1.00 <br /> Benzene 10/21/99 ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a.a.o-Tris luorotoluene 0.200 0.170 60.0-140 85.0 <br /> LCS 9100256-BSI <br /> Benzene 10/21/99 0.200 0.201 mg/kg 70.0-130 101 <br /> Toluene 0.200 0.206 70.0-130 103 <br /> Ethylbenzene 0.200 0.200 70.0-130 100 <br /> Xylenes(total) 0.600 0.600 70.0-130 100 _ <br /> Surrogate: a,a,a-Tris luoroto/uene 0.200 0.173 " 60.0-140 86.5 <br /> Matrix Spike 9100256-NISI S910196-01 <br /> Benzene 10/21/99 0.200 ND 0.163 - mg/kg 60.0-140 81.5 <br /> Tolucnc 0.200 ND 0.167 60.0-140 83.5 <br /> Ethylbenzene 0.200 ND 0.163 60.0-140 81.5 <br /> Xylenes(total) " 0.600 ND _ 0.492 _60.0-140 82.0 <br /> Surrogate: a,a,o-Tris luorotoluene 0.200 0.160 60.0-140 80.0 <br /> Matrix Spike Dur) 9100256-NISDI S910196-01 <br /> Benzene 10/21/99 0.200 ND 0.166 mg/kg 60.0-140 83.0 25.0 1.82 <br /> Toluene 0.200 ND 0.I70 60.0-140 85.0 25.0 1.78 <br /> Ethylbenzene 0.200 ND 0.166 60.0-140 83.0 25.0 1.82 <br /> Xylenes(total) 0.600 ND 0.501 60.0-140 83.5 25.0 1.81 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.167 60.0-140 83.5 <br /> v <br /> Sequoia Analytical-Sacramento •Refer to end of report for text of notes and definitions. <br /> r <br /> Page 5 of 7 <br /> ` I <br /> ' k <br />