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1 S. 2.5 Closure and Restoration ' 2.5. I Soils Based on the results of the soil sample analyses, the excavation will either be backfilled or further excavated. If chemicals are not present or ' are detected at levels below regulatory clean-up standards the excavation will be backfilled with clean soils removed above the level of the buried ' tank as well as with imported fill . Backfill material will be compacted to 90 percent relative compaction to within one foot of surrounding grade. ' The final surface will be compacted with the same material that was in place prior to excavation. In the event that chemicals are detected in the soil samples above regulatory clean-up levels, a second round of excavation and sampling will ' be performed. The need for further excavation or the implementation of alternative remedial actions for contaminated soils will be based on the results of the second round of analyses and on field observations regarding the extent of contamination and volume of soils impacted. In some cases, ' it may be more cost effective to implement actions other than excavation and off-site disposal . 2.5.2 Ground Water At this time, based on the site visit and review of local geology/hydrogeology, it is not expected that ground water will be ' encountered during excavation operations. If however, ground water is encountered, a water sample will be collected and analyzed for the appropriate tank content constituents as listed above. Samples will be collected using laboratory prepared glass sample bottles equipped with teflon lined lids. If chemicals are detected, a proposal for ground water remediation will be developed. A typical remediation might consist of initially installing three monitoring wells in an effort to assess the nature and extent of ground water contamination and to provide information 1 CanonleEnvironmental