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L5-- Sequoia <br />`11� Analytical <br />1455 McDowell Blvd. North. Ste. D <br />J Petaluma. CA P4914 <br />(707)792-1865 <br />FAX (707) 792-0342 <br />�ambria Environmental <br />Project: <br />TFD 4B-28 <br />Sampled: <br />11/2/99 <br />?70 Perkins St. <br />Project Number: <br />3011 West Benjamin Holt Dr. <br />Received: <br />11/3/99 <br />Sonoma, CA 95476 <br />Project Manager: <br />Bob Perlowski <br />Reported: <br />11/9/99 <br />Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br />Sequoia Analytical - Petaluma <br />Date Spike Sample QC Reporting Limit Recov. RPD RPD <br />Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes' <br />Batch: 9110086 <br />Blank <br />Gasoline <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Methyl cert -butyl ether <br />Surrogate: a,a,a-Triiluorotoluene <br />Surrogate: 4-Bromofluorobenzene <br />Date Prepared: 11/3/99 <br />9110086-BLK1 <br />11/3/99 ND mg/kg <br />ND " <br />ND " <br />ND " <br />ND " <br />ND " <br />0.661 <br />0.553 <br />Extraction Method: EPA 5030 soils <br />0.600 <br />0.600 <br />1.00 <br />0.00500 <br />0.00500 <br />0.00500 <br />0.00500 <br />0.0500 <br />65.0-135 /10 <br />65.0-135 91.2 <br />LCS <br />9110086 -BSI <br />0.240 <br />0.223 <br />0.207 <br />0.674 <br />119 <br />0.225 <br />Benzene <br />11/3/99 0.200 <br />0.216 mg/kg <br />65.0-135 <br />108 <br />Toluene <br />0.200 <br />0.211 <br />65.0-135 <br />105 <br />Ethylbenzene <br />0.200 <br />0.203 <br />65.0-135 <br />101 <br />Xylenes (total) <br />0.600 <br />0.659 <br />65.0-135 <br />110 <br />Surrogate: a,a,a-Trifluorotohtene <br />0.600 <br />0.637 <br />65.0-135 <br />106 <br />Matrix Spike <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Surrogate. a,a,a-Trinuorotoluene <br />9110086 -MSI P910618-02 <br />II/3/99 0.200 ND <br />0.200 ND <br />" 0.200 ND <br />" 0.600 ND <br />0.600 <br />0.238 mg/kg <br />65.0-135 <br />0.240 <br />0.223 <br />0.207 <br />0.674 <br />119 <br />0.225 <br />65.0-135 <br />Surrogate: a,a,a-Triiluorotoluene <br />112 <br />0.207 <br />65.0-135 <br />65.0-135 <br />103 <br />0.673 <br />65.0-135 <br />Date Prepared: 11/4/99 <br />112 <br />0.676 <br />65.0-135 <br />5030 soils <br />113 <br />Matrix Spike Duo <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total)___ <br />9110086-MSDI P910618-02 <br />11/3/99 0.200 ND <br />0.200 ND <br />0.200 ND <br />0.600 ND <br />0.240 <br />0.223 <br />0.207 <br />0.674 <br />mg/kg 65.0-135 <br />65.0-135 <br />65.0-135 <br />65.0-135__ <br />120 20.0 <br />112 20.0 <br />103 20.0 <br />112 <br />0.837 <br />0 <br />0 <br />0 <br />Surrogate: a,a,a-Triiluorotoluene <br />_ <br />" 0.600 <br />0.676 <br />65.0-135 <br />_2_0_.0_ <br />113 <br />_ <br />Batch: 9110120 <br />Date Prepared: 11/4/99 <br />Extraction Method: EPA <br />5030 soils <br />Blank <br />9110120-BLKI <br />Gasoline <br />II/4/99 <br />ND <br />mg/kg 1.00 <br />Benzene <br />ND <br />0.00500 <br />Toluene <br />ND <br />0.00500 <br />Ethylbenzene <br />ND <br />0.00500 <br />Xylenes (total) <br />ND <br />0.00500 <br />Methyl cert -butyl ether <br />ND <br />0.0500 <br />Surrogate: a,a,a-Triiluorotoluene <br />0.600 <br />0.653 <br />65.0-135 <br />109 <br />Surrogate: 4-Bronmfluorobenzene <br />0.600 <br />0.581 <br />" 65.0-135 <br />96.8 <br />Sequoia Analytical - Petaluma *Refer to end of report for text of notes and definitions. <br />Page 12 of 20 <br />