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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> I„F Analytical FAX(916)921-0100 <br /> Cambria Environmental Project: Equilon 440 W Charter Way,Stockton Sampled: 6/25/99 <br /> 270 Perkins Street Project Number: 88870583 Received: 6/25/99 <br /> Sonoma,CA 95476 Project Manager: Wayne Chiu Reported: 6/29,7/8-9/99 <br /> BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 9060383 Date Prepared: 6/'--5/99 Extraction Method: EPA 5030B(MeOH) <br /> Blank 9060383-BLK1 <br /> Benzene 6/25/99 ND mg/kg 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.200 60.0-140 100 <br /> LIU 9060383-BSl <br /> Benzene 6/25/99 0.200 0.207 mg/kg 70.0-130 103 <br /> Toluene 0.200 0.224 70.0-130 112 <br /> Ethylbenzene 0.200 0.224 70.0-130 112 <br /> Xylenes(total) 0.600 0.599 70.0-130 99.8 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.201 60.0-140 101 <br /> Matrix Spike 9060383-MSI S906238-04 <br /> Benzene 6/25/99 0.200 ND 0.195 mg/kg 60.0-140 97.5 <br /> Toluene 0.200 ND 0.208 60.0-140 104 <br /> Ethylbenzene 0.200 ND 0.209 60.0-140 105 <br /> Xylenes(total) 0.600 ND 0.563 60.0-140 93.8 <br /> Surrogate: a,a,a-Tri luorotoluene 0.200 0.192 60.0-140 96.0 <br /> Matrix Spike Dun 9060383-n1SDl S906238-04 <br /> Benzene 6/25/99 0.200 ND 0.192 mg/kg 60.0-140 96.0 25.0 1.55 <br /> Toluene 0.200 ND 0.195 60.0-140 97.5 25.0 6.45 <br /> Ethylbenzene 0.200 ND 0.206 60.0-140 103 25.0 1.92 <br /> Xylenes(total) 0.600 ND 0.555 60.0-140 92.5 25.0 1.40 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.193 60.0-140 96.5 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 15 of 18 <br /> m <br />