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Sequoia 404 N WDLane <br />Walnut Creek GAA 94598 <br />r (925) 988-9600 <br />Analytical <br />FAX (925) 988-9673 <br />Riettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 4 9-5775 Reported <br />Dublin CA, 94568 Project Manager Barbara Sieminski 05 -Jan -00 10 22 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />MW546 (W912522-13) Sail Sampled 20 -Dec -99 13 05 <br />Received 23 -Dec -99 13 05 <br />Purgeable Hydrowrbons <br />ND <br />10 <br />mg/kg 20 9131002 31 -Dec -99 <br />31 -Dec -99 EPA <br />Benzene <br />0 019 <br />00050 <br />" " " " <br />80198020 <br />Toluene <br />0 017 <br />00050 <br />" <br />Ethylbenzene <br />ND <br />00050 <br />Xylenes (total) <br />ND <br />00050 <br />" <br />Methyl tert-butyl ether <br />033 <br />0 050 <br />" <br />Surrogate a a a-Tnfluorotoluene <br />114 % <br />40-140 <br />" <br />MW5-56 (W912522-14) Soil Sampled 20 <br />-Dec -99 13 15 <br />Received <br />23 -Dec -99 13 05 <br />Purgeable Hydrocarbons <br />ND <br />10 <br />mg/kg 20 9L31002 31 -Dec 99 <br />31 -Dec -99 EPA <br />Benzene <br />ND <br />00050 <br />" 8015M020 <br />Toluene <br />00052 <br />00050 <br />" <br />Ethylbenzene <br />ND <br />00050 <br />" <br />Xylenes (total) <br />00052 <br />00050 <br />" <br />Methyl tert-butyl ether <br />0 12 <br />0 050 <br />" <br />rrogate a,a,a-Tnfluorotoluene <br />107% <br />40-140 <br />" <br />5-75 5 (W912522-15) Soil Sampled <br />20 -Dec -99 13 45 Received 23 -Dec -99 13 05 <br />Purgeable Hydrocarbons <br />ND <br />10 <br />mg/kg 20 9L31002 31 -Dec -99 <br />31 -Deo -99 EPA <br />Benzene <br />0 013 <br />00050 <br />" " <br />8015/6020 <br />Toluene <br />0 011 <br />00050 <br />" <br />Ethylbenzene <br />ND <br />00050 <br />" <br />Xylenes (total) <br />00075 <br />00050 <br />" <br />Methyl tert-butyl ether <br />0 16 <br />0 050 <br />" <br />Surrogate a,a,a-Tnfluorotoluene <br />103 % <br />40-140 <br />" <br />Sequoia Analytical - Walnut Creek The nesvlts to this report apply to the swnples analyzed in accor&mce with the churn of <br />iscustody document Tits aralyncal report must be reproduced in i is entirety <br />A dii emp, a ratory irector Page 6 of 15 <br />