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Fr.!•� Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> Analytical (707)792 1865 <br /> FAX(707)792 0342 <br /> iswww sequotalabs com <br /> Secor-Rancho Cordova Protect Arco Site 4932,Stockton,CA P403223 <br /> 3017 Mgare Road Suite 100 Project Number [none] Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03125104 16 45 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Result %REC Limits APD Limit Notes <br /> Batch 4030287-EPA 50308,waters <br /> Matrix Spike(4030287-MSI) Source P403171-01 Pre ared&Anal zed 03/11/04 <br /> Gasoline Range Organics(C&CIO) 2660 50 mg/ml Air 2750 12 96 65 135 <br /> Gasoline Range Organics(C6-C10) 755 14 ppmv 780 3 3 96 65 135 <br /> Benzene 44 5 050 mg/ml Air 33 5 ND 133 65-135 <br /> Benzene 14 0 0 16 ppmv 105 ND 133 65-135 <br /> Toluene 61 8 0 13 11504 0 073 122 65-135 <br /> Toluene 232 0 50 mg/ml Air 190 0 27 122 65-135 <br /> Ethylbenzene 52 3 050 45 5 ND 115 65-135 <br /> Ethylbenzene 12 1 0 12 ppmv 105 ND 115 65-135 <br /> Xylenes(total) 56 9 0 12 " 51 2 ND 111 65-135 <br /> Xylenes(total) 247 050 mg/m'Air 222 ND 111 65-135 <br /> Methyl Cert-butyl ether 10 3 056 ppmv 15 0 0 20 67 65-135 <br /> •Methyl tert-butyl ether 36 9 20 mg/ml Air 540 0 73 67 65-135 - <br /> Surrogate a a a-Trtfluorotoluene 579 ppmv 503 115 65-135 <br /> Surrogate a a a-Trtfluorotoluene 346 mg/m'Air 300 115 65-135 <br /> Surrogate 4-Bromofluorobenzene 42 5 ppmv 419 101 65-135 <br /> Surrogate 4-Bromofluorobenzene 304 mg/m'Air 300 101 65-135 <br /> Matrix Spike Dup(4030287-MSD1) Source P403171-01 Prepared&Analyzed 03/11/0.4 <br /> Gasoline Range Organics(C6-C10) 718 14 ppmv 780 3 3 92 65-135 5 20 <br /> Gasoline Range Organics(C6-C10) 2530 50 mg/ml Air 2750 12 92 65-135 5 20 <br /> Benzene 440 0 50 " 33 5 ND 131 65-135 1 20 <br /> Benzene 13 8 0 16 ppmv 105 ND 131 65-135 1 20 <br /> Toluene 230 0 50 mg/ml Air 190 0 27 121 65-135 09 20 <br /> Toluene 61 3 0 13 ppmv 504 0 073 121 65-135 0 8 20 <br /> Ethylbenzene 115 0 12 " 10 5 ND 110 65-135 5 20 <br /> Ethylbenzene 500 050 mg/ml Air 45 5 ND 110 65-135 4 20 <br /> Xylenes(total) 241 050 222 ND 109 65-135 2 20 <br /> Xylenes(total) 55 6 0 12 ppmv 512 ND 109 65-135 2 20 <br /> Methyl tert-butyl ether 376 2 0 mg/ml Air 540 0 73 68 65-135 2 20 <br /> Methyl tert-butyl ether 105 056 ppmv 15 0 0 20 69 65 135 2 20 <br /> Surrogate a a a-Trtfluorotoluene 57 7 " 503 115 65-135 <br /> Surrogate a a a-Trtfluorotoluene 344 mg/m'Air 300 115 65-135 <br /> Surrogate 4-Bromofluorobenzene 41 1 ppmv 419 98 65-135 <br /> Surrogate 4-Bromofluorobenzene 294 mg/m'Air 300 98 65-135 <br /> I <br /> I <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 7 <br />