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Sequoia 1455 McDowell Blvd North SicD <br /> I'esaluma CA 94949 54 <br /> (1) (707)792 1865 <br /> Analytical FAX(707)7920342 <br /> www sequotalabs cam <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P31058E54 3017 Kilgare Road Suite 100 Project Number 38984 Reporte <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 l <br /> Purgeable Hydrocarbons and BTEX by EPA 801513/802113 - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3100757-EPA 5030 waters <br /> Blank(3100757-BLKI) Prepared&Analyzed 10/30/03 <br /> Gasoline Range Organics ND 14 ppmv <br /> Gasoline Range organics ND 50 mg/ml Air <br /> Benzene ND 016 ppmv <br /> Benzene ND 0 50 mg/ml Air <br /> Toluene ND 013 ppmv <br /> Toluene ND 0 50 mg/ml Air <br /> Ethylbemcric ND 050 <br /> Ethylbenzene ND 012 ppmv <br /> Xylenes(total) ND 050 mg/m'Air <br /> Xylenes(total) ND 0 12 ppmv <br /> Methyl tert-butyl ether ND 0 56 .1Methyl tert-butyl ether ND 2 0 mg/ml Air <br /> Surrogate a a a-Trifluorotoluene 495 ppmv 503 98 65-135 <br /> Surrogate aaa-Trifluorotoluene 295 mglm'Atr 300 98 65-135 <br /> Surrogate 4-Bromofluorobenzene 280 300 93 65-135 <br /> Surrogate 4-Bromofluorobenzene 391 ppmv 419 93 65-135 <br /> Laboratory Control Sample(3100757-BS1) Prepared&Analyzed 10/30/03 <br /> Gasoline Range Organics 692 14 ppmv 780 89 65-135 <br /> Gasoline Range Organics 2440 50 mg/ml Air 2750 89 65-135 <br /> Benzene 13 3 016 ppmv 12 7 105 65-135 <br /> Benzene 42 5 050 mg/ml Air 405 105 65-135 <br /> Toluene 229 050 208 110 65-135 <br /> Toluene 608 0 13 ppmv 554 110 65-135 <br /> Ethylbenzene 110 012 104 106 65-135 <br /> Ethylbenzene 476 050 mg/ml Air 450 106 65-135 <br /> Xylenes(total) 245 050 218 112 65-135 <br /> Xylenes(total) 565 0 12 ppmv 502 113 65-135 <br /> Methyl tert-butyl ether 224 056 175 128 65-135 <br /> Methyl cert-butyl ether 804 2 0 mg/m'Air 63 0 128 65-135 <br /> Surrogate a a a-Trifluorotoluene 334 11300 111 65-135 <br /> Surrogate a a a-Trifluorotoluene 560 ppmv 503 111 65-135 <br /> Surrogate 4-Bromofluorobenzene 419 11419 100 65-135 <br /> Surrogate 4-Bromofluorobenzene 300 mg/m'Air 300 100 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 weighs basis <br /> This analytical report must be reproduced in its entirety <br /> Page 1 1 of 19 <br />