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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792 1865 <br /> a— ) <br /> W Analytical FAX(707)792 0342 <br /> www sequoialabs con <br /> Secor-Rancho Cordova Pr4lect Arco Site 4932,Stockton,CA P407278 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/11/04 09 51 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %IAC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4070288-EPA 5030B,waters <br /> Blank(4070288-BLK1) Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 mg/ml Air <br /> Gasoline Range Organics(C4-C12) ND 14 ppmv <br /> Surrogate 4-Bromofluorobenzene 157 mg/m'Rir 300 86 65-135 <br /> Surrogate 4-Bromofluorobenzene 359 ppmv 419 86 65-135 <br /> Laboratory Control Sample(4070288-BSI) _ Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C 12) 2130 50 mglm'Air 2750 77 65 135 <br /> Gasoline Range Organics(C4-C 12) 605 14 ppmv 780 78 65 135 <br /> Surrogate 4-Bromofluorobenzene 171 mg/m'Rir 300 91 65-135 <br /> Surrogate 4-8romofluorobenzene 380 ppmv 419 91 65-135 <br /> Matrix Spike(4070288-MS1) Source P407195-01 Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C12) 2160 50 mg/ml Air 2750 ND 79 65 135 <br /> Gasoline Range Organics(C4 CI 2) 613 14 ppmv 780 ND 79 65 135 <br /> Surrogate 4-Bromofluorobenzene 395 419 94 65135 <br /> Surrogate 4-Bromofluorobenzene 181 mg/m'Air 300 94 65135 <br /> Matrix Spike Du (4070288-MSD1) Source P407195-01 Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4 CI 2) 601 14 ppmv 780 ND 77 65 135 2 20 <br /> Gasoline Range Organics(C4-C12) 2120 50 mg/ml Air 2750 ND 77 65 135 2 20 <br /> Surrogate 4-Bromofluorobenzene 271 300 90 65135 <br /> Surrogate 4-Bromofluorobenzene 379 ppmv 419 90 65 135 <br /> Batch 4070524-EPA 5030B waters <br /> Blank(4070524-BLK1) _ Prepared&Analyzed 07/27/04 <br /> Gasoline Range Organics(C4-CI2) ND 50 ugA <br /> Surrogate 4-Bromofluorobenzene 263 11300 88 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> Thu analytical report must be reproduced in its entirety <br /> Page 10 of 17 <br />