2007-11-20_REVISION - M1982015 (12)

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0 u l Table IV B1 _ Hiahest "Slurrv" Cnntaminant I oval a-,of 1/gn/n7 Sample ID Benzene Toluene Ethyl Benzene Total Xylenes mg/Kg mg/Kg mg/Kg mg/Kg Slurry Holding Trench 400 620 290 1,100 These results are from the composite sample collected from the SHT on December 19, 2006. This materials was contained in a holding trench that was approximately 4 feet wide x 400 feet long x -5 feet deep. Table IV 132 Hiahest "In-Situ" Snil Cnntaminant I oval ac of 1/gn/07 Sample ID Benzene Toluene Ethyl Benzene Total Xylenes mg/Kg mg/Kg mg/Kg mg/Kg Various soil borings <0.0021 <0.0029 <0.0028 <0.50 These results are from numerous soil borings collected from the immediate vicinity of the SHT since January 3, 2006. Table IV B3. Hiahest Groundwater Contaminant Level Sample ID Benzene Toluene Ethyl Benzene Total Xylenes ug/Kg ug/Kg ug/Kg ug/Kg MW-1 2,700 3,000 250 1,500 These results are from the groundwater monitoring well located approximately 50 feet east of the pipeline release area. - A table or list of site contaminants, indicating the maximum concentrations of each contaminant detected onsite where the contaminant was discharged to the environment and/or where the worst effects of the discharge are believed to exist. This information is required so that an understanding of the source and nature of the contaminants can be made as it relates to risk. See the previous section. - A table or list of site contaminants indicating whether the contaminant has a published State standard or remediation objective, the published standard or objective, and the medium the standard or objective applies to. This is important in evaluating whether the proposed corrective actions will meet established standards or if the proposed risk-based cleanup objectives are appropriate for the site. See the previous sections IV. A. and IV. B. 14