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05 October 1998 <br /> AGE-NC Project No. 98-0433 <br /> ' Page 3 of 4 <br /> • On 15 September 1998, six laboratory-composited soil samples were collected from the <br /> ' "clean" soil in stockpile SP4 that was still remaining on the site. Low concentrations of <br /> diesel were detected in two of the six samples, other petroleum hydrocarbon analytes were <br /> ' not present in the samples at concentrations exceeding the method detection limits. <br /> • Based on the impact of the soils in SP4, from the new UST installation, the PHS-EHD <br /> directed that this soil to be disposed of at a licenced disposal facility and not be transported <br /> off-site to a second location for an auxiliary purpose, like backfill of another UST <br /> excavation. <br /> ' On 03 November, 326.4 tons of lightly diesel-impacted soil was transported and disposed <br /> at Forward Landfill. The soil had been generated by the removal and excavation of the new <br /> UST location. <br /> Table 1 provides a summary of excavated soil volumes/weights and final soil dispositions. <br /> Olympian Oil has proposed to dispose of the remaining impacted soil at Forward Landfill. However, <br /> prior to approving of any further soil disposal, the PHS-EHD has requested consideration and <br /> analysis of the feasibility of alternative methods for treatment or dispose of hydrocarbon-impacted <br /> soil from the site. Therefore, AGE examined several remedial alternatives for the excavated soil. <br /> Based upon feasibility, cost and impact on the business use of the property, AGE recommends <br /> ' disposal of the remaining impacted soil at Forward, Inc. <br /> If you have any questions or comments, please contact our office at(209) 467-1006. <br /> Advanced GeoEnvironmental,Inc. <br />