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2 1.3 Proposed Excavation <br /> Proposed excavation and remediation of the Acampo site will be in keeping with <br /> the methodology outlined in Section 3 of this plan Proposed methodology is as follows <br /> o Each contaminated zone will be excavated to a depth of 10FT Lateral excavation <br /> limits will be based on olfactory and visual field analysis(i a if it can be seen or <br /> 1 smelled, and can be safely excavated, it will be) <br /> o One sidewall sample will be collected from each of the following depths 2 FT , 5 <br /> FT , and 10 FT (or bottom of excavation) The 2FT and 5FT samples will be <br /> analyzed for TPH (hydrocarbon screen) using EPA Method 8015, BTEXITPH9 using <br /> EPA Method 8020/8015 The 10 FT sample will be analyzed for TPHd(hydrocarbon <br /> screen) and BTEX One bottom sample will be collected and analyzed for TPH <br /> (hydrocarbon screen) and BTEX <br /> ' o When the boundaries of the contaminated soil are identified, the excavation will be <br /> backfilled with remediated or imported non-contaminated soil and compacted to <br /> 90% Proctor ti <br /> ® If the target concentrations are not met, soil will be excavated until analysis indicates <br /> the target concentrations are met or a depth of abot 18�feet (maximum depth of <br /> excavation equipment) is reached The excavation will then be backfilled with <br /> remediated soil <br /> ® Hydrocarbon-containing soil will be stockpiled near the excavation area for profiling <br /> and consideration of bioremediation If soil is to be bio-remediated, remediation will <br /> be conducted as described in Section 3 of this plan Remediation will be considered <br /> ' complete when soil target concentrations are reached and visual/olfactory field <br /> analysis indicates hydrocarbons are non-detectable <br /> ' 2-4 <br /> 1 <br />