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885 Jarvis Dr Sequoia Morgan Hit,CA95037 (408)776.9600 a— ) Analytical FAX(408)782-6308 www mquoialabs ccm Stratus Environmental Inc Project ARCO#2130 Ml-L0779 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 I6 20 Gasoline (2-Methylpentane to 1,2,4-Trlmethylbenzene) and BTEX by EPA 8015M and 8021B Sequoia Analytical -Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes VW-1 (MLL0779-01)Water Sampled 12/19/02 1106 Received 12/19/02 15 55 _ Purgeable Hydrocarbons 810 500 ugA 10 3010016 01/02/03 41/02/03 EPA 8015/8021 Benzene ND 50 " Toluene ND 50 " Ethylbenzene 59 50 " Xylenes(total) 130 50 Surrogate a a a-Trrfluorotoluene 91 % 60-140 " VW-2(MLL0779_-02)Water Sampled 12/19/02 07 12 Received 12/19/02 15 55 Purgeable Hydrocarbons I20 50 ug/l 1 3010016 01/02/03 01/02/03 EPA 8015/8021 Benzene 12 050 " Toluene ND 050 Ethylbenzene ND 050 Xylenes(total) ND 050 " Surrogate a aa-Trtfluorotoluene 97% 60-140 " VW-3(IYILL0779-03)Water Sampled 12/19/02 11 45 Received 12/19/02 15 55 geable Hydrocarbons ND 50 ug/1 "1- - 3010016 01/02/03 01/02/03 EPA 8015/8021 Benzene 0 99 050 " Toluene ND 0 50 " Ethylbenzene 3 8 050 " Xylenes(total) 10 050 " Surrogate a a,a-Trifluorotoluene 89% 60-140 ~ VW4(MLL0779-04)Water Sampled 12/19/02 10 04 Received 12/19/02 15 55 _ Purgeable Hydrocarbons 110 50 ug/l 1 3010016 01/01/03 01/01/03 EPA 8015/8021 Benzene 0 93 0 50 " 11 Toluene ND 050 " Ethylbenzene ND 050 Xylenes(total) ND 050 " Surrogate a,a,a-Trifluorotoluene 95% 60-140 " Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to accordance with the chain of custody document Unless otherwise stated results are reported on a wet weight basis Thos analytical report must be reproduced in its entirety 3of17