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HSS 5037 <br /> a— ) <br /> Dnve <br /> Sequoia Morgan Hilll CA CA 45037Analytical FAX(408)776 9600 <br /> (408)782 5308 <br /> WWW sequoialabs com <br /> Secor-Rancho Cordova(ARCO) Project ARCO##4932,Stockton,CA MN10277 <br /> 3017 Kilgore Rd Suite 100 Project Number NIP Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Ben osky 09/23/04 16 56 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result limit Units Dilution Bateh Prepared Analyzed Method Note <br /> INF(MN10277-01)Air Sampled 09/09/04 11 40 Received 09/10/04 10 00 HT-09 <br /> Gasoline Range Organics(C4-C12) 740 200 mg/m'Air 20 4113005 09/13/04 09/13/04 EPA 6015131 <br /> 9021B <br /> Benzene 4 6 2 0 " <br /> Toluene 16 2 0 <br /> Ethylbenzene 12 2 0 <br /> Xylenes(total) 91 4 0 " <br /> Methyl tert-butyl ether 120 10 " <br /> Surrogate a a a-Triuorotoluene 84% 56-134 <br /> Surrogate 4-Broinofluorobenzene 115% 70-130 " <br /> Gasoline Range Organies(C4-C12) 210 49 ppmv 20 " <br /> Benzene 14 063 <br /> Toluene 4 4 053 ^ <br /> Ethylbenzene 2 9 046 ^ " <br /> Xylenes(total) 21 095 <br /> Methyl tert-butyl ether 32 2 8 <br /> Surrogate a a a-Trifluorotoluene 84% 56-134 " ~ <br /> Surrogate 4-Bromofluorobenzene 115% 70-130 <br /> AS-EFF(MNI0277-02)Air Sampled 09/09/04 11 35 Received 09/10/04 10 00 HT-09 <br /> Gasoline Range Organics(C4-C12) ND 200 mg/ml Air 20 4113005 09/13/04 09/13/04 EPA 8015B/ <br /> 8021B <br /> Benzene ND 2 0 <br /> Toluene 3 2 2 0 <br /> Ethylbenzene ND 2 0 <br /> Xylenes(total) 6 0 4 0 ^ " <br /> Methyl tert-butyl ether 35 10 <br /> Surrogate a a a-Triuorotoluene 100% 56-134 <br /> Surrogate 4-Bromofluorobenzene 106% 70-130 <br /> Gasoline Range organics(C4-C12) ND 49 ppmv 20 " <br /> Benzene ND 063 ^ " <br /> Toluene 086 053 " ^ <br /> Ethylberizene ND 046 <br /> Xylenes(total) 14 095 ^ ^ <br /> Methyl tert-butyl ether 9 8 2 8 " <br /> Surrogate a a,a-Triuorotoluene 100% 56-134 ^ <br /> Surrogate 4-Bromofluorobenzene 105% 70-130 ^ <br /> Sequoia Analytical-Morgan Hill The results in this repori 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 /> This analytical report must be reproduced in its entirety <br /> Page 6 of 15 <br />