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Sequoia 819 Striker Avenue, Suite 8 <br /> D <br /> Sacramento,CA 95834 <br /> („- FAX Analytical (916)921-9600 <br /> (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 /> 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 /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit 'Votes* <br /> I CS(continued) 9060406-BSI <br /> Ethylbenzene 6/25/99 0.200 0.194 mg/kg 70.0-130 97.0 <br /> Xylenes(total) 0.600 0.582 70.0-130 97.0 <br /> Surrogate: a,a,a-Tris ltiorotoluene 0.200 0.157 60.0-140 78.5 <br /> Matrix Spike 9060406-MS1 5906291-01 <br /> Benzene 6/25/99 0.200 ND 0.168 mg/kg 60.0-140 84.0 <br /> Toluene 0.200 ND 0.171 60.0-140 85.5 <br /> Ethylbenzene 0.200 ND 0.171 60.0-140 85.5 <br /> Xylenes(total) 0.600 ND 0.515 60.0-140 85.8 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.151 60.0-140 75.5 <br /> Matrix SpikeDuo 9060406-MSD1 5906291-01 <br /> Benzene 6/25/99 0.200 ND 0.174 mg/kg 60.0-140 87.0 25.0 3.51 <br /> Toluene 0.200 ND 0.176 60.0-140 88.0 25.0 2.88 <br /> Ethylbenzene 0.200 ND 0.178 60.0-140 89.0 25.0 4.01 <br /> Xylenes(total) 0.600 ND 0.533 60.0-140 88.8 25.0 3.44 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.153 60.0-140 76.5 <br /> Batch: 9060408 Date Prepared: 6/28/99 Extraction Method: EPA 5030B(MeOH) <br /> Blah 9060408-BLKI <br /> Purgeable Hydrocarbons 6/28/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.165 60.0-140 81.5 <br /> LCS 9060408-BSI <br /> Benzene 6/28/99 0.200 0.211 mg/kg 70.0-130 105 <br /> Toluene 0.200 0.219 70.0-130 109 <br /> Ethylbenzene 0.200 0.215 70.0-130 108 <br /> Xylenes(total) 0.600 0.649 70.0-130 108 <br /> Surrogate: a,a,a-TriJluoroto1uene 0.100 0.166 60.0-140 83.0 <br /> Matrix Spike 9060408-MS1 5906335-04 <br /> Benzene 6/28/99 0.200 ND 0.172 mg/kg 60.0-140 86.0 <br /> Toluene 0.200 ND 0.176 60.0-140 88.0 <br /> Ethylbenzene 0.200 ND 0.176 60.0-140 88.0 <br /> Xylenes(total) 0.600 ND 0.532 60.0-140 88.7 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.146 60.0-140 73.0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 12 of 18 <br />