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.'V' 885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037037 <br /> D7 <br /> �►. Analytical (408)FAX equoi lab 6308 <br /> corn www sequoialabe corn <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MND0090 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Pro)ect Manager Rusty Benkosky 04/19/04 17 58 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result "Mit Units Dilution Balch Prepared Analyzed Method Note <br /> INF(MND009041)Air Sampled 04/05/04 11 10 Received 04/06/04 09 30 <br /> Gasoline Range Organics(C4-C12) 1700 200 mg/ml Air 20 4DO7003 04/07/04 04/07/04 EPA 8015B1 <br /> 8021 B <br /> Benzene 78 2 0 <br /> Toluene 27 2 0 <br /> Ethylbenzene 48 2 0 <br /> Xylenes(total) 330 4 0 <br /> Methyl tent-butyl ether ND 10 " ^ <br /> Surrogate a,a,a-Triuorotoluene 992% 56-134 " ^ <br /> Surrogate 4-Bromofluorobenzene 126% 70-130 <br /> Gasoline Range Organics(C4-C12) 490 49 ppmv 20 " ~ <br /> Benzene 24 063 <br /> Toluene 7 0 053 <br /> Ethylbenzene 11 046la <br /> Xylenes(total) 76 0 95 <br /> Methyl tert-butyl ether ND 28 " " ^ <br /> Surrogate a a a-Triuorotoluene 993% 56-134 ^ <br /> Surrogate 4-Bromofluorobenzene 126% 70-130 <br /> EFF(MND0090-02)Air Sampled 04/05/04 11 00 Received 04/06/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 10 mg/ml Air 1 4DO7003 04/07/04 04/07/04 EPA 801581 <br /> 8021B <br /> Benzene ND 010 ^ <br /> Toluene 3 6 0 10 <br /> Ethylbenzene ND 0 1Q <br /> Xylenes(total) 043 020 " <br /> Methyl tert-butyl ether ND 050 ^ <br /> Surrogate a,a,a-Trtfluorotoluene 102% 56.134 <br /> Surrogate 4-Bromofluorobenzene 84 601a 70-130 ^ <br /> Gasoline Range Organics(C4-C12) ND 2 4 ppmv <br /> Benzene ND 0 031 <br /> Toluene 094 0 027 ^ <br /> Ethylbenzene ND 0 023 " ^ <br /> Xylenes(total) 0 099 0 047 <br /> Methyl tert-butyl ether ND 0 14 <br /> Surrogate a,a,a-Trifluorotoluene 101% 56-134 " <br /> Surrogate 4-Bromofluorobenzene 845% 70-130 " ^ <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 15 <br />