ARCHIVED REPORTS XR0006610 - Laserfiche WebLink

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1 Corrective Action Plan—Tosco(76)Service Station No 11192, Stockton, California March 13,2002 4) GR tests at other sites indicates the ability of an ozone air mixture to degrade MtBE, which is the main constituent of concern DISADVANTAGES 1) Areas outside of the injection point radius of influence may take longer to treat 2) Might be difficult to treat large areas CONCLUSION Initial results of GR field tests at other sites indicate that this is a feasible remedial technique for treating MtBE and other petroleum compounds at this site FEASIBILITY STUDY Continued 1 For all sites, each recommended alternative shall be designed to mitigate nuisance conditions and risk of fire or explosion: A site Health and Safety Plan (HSP) will be prepared for the recommended scope of work The HSP will be strictly followed in order to ensure site and community safety 2 For sites where unauthorized release affects or threatens water with current or potential beneficial uses designated in water quality control plans, the feasibility study shall also identify and evaluate at least two alternatives for restoring or protecting these beneficial uses: As previously stated in this CAP, it does not appear that the hydrocarbons that are present at the subject site threaten any surface water or wetlands in the vicinity of the site that have a current or potential beneficial use However, the groundwater in the vicinity of the site has been classified by the RWQCB as an area of current and/or potential beneficial use Therefore, GR recommends installation of an ozone microsparge system to remediate the impacted groundwater beneath the site The existing groundwater monitoring wells are currently monitored and sampled quarterly This program will be continued and modified, as appropriate, to provide verification monitoring of corrective action effectiveness and progress towards cleanup levels 140245 08 11