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ARCADIS Mr. Steven W. Meeks <br /> October 6, 2011 <br /> Objective <br /> The objective for destroying the selected wells is to eliminate the risk of potential <br /> contamination to reach groundwater through the wells. This objective will be met by <br /> conducting the proposed scope of work described within this work plan. <br /> The rationale behind selecting the proposed remediation wells (air sparge wells, soil <br /> vapor extraction wells, dual phase extraction wells, infiltration gallery wells, soil gas <br /> sampling points, etc.)for destruction is that these wells are no longer used for <br /> remediation and likely will not be used in the future for remediation. Similarly, the <br /> monitoring wells selected for destruction have either not been sampled in a long time <br /> and/or collection of additional data from these wells does not provide useful <br /> information. <br /> Scope of Work <br /> The scope of work includes conducting pre-field activities, field activities, and <br /> reporting. A summary of each activity is described in the following text. <br /> Pre-Field Activities <br /> Several activities will be conducted prior to well destruction, including permitting, <br /> subsurface utility clearance, and revising the site-specific health and safety plan <br /> (HASP). Additionally, access to off-site properties will be communicated prior to field <br /> work at those locations, as appropriate. <br /> Permitting <br /> ARCADIS will obtain well destruction permits from the San Joaquin County <br /> Environmental Health Department(SJCEHD). ARCADIS will notify the SJCEHD a <br /> minimum five days prior to completing well destructions to coordinate anticipated <br /> SJCEHD inspector oversight. <br /> Utility Clearance <br /> Prior to conducting subsurface work at the site, the well locations will be cleared for <br /> underground utilities by a private utility locator and Underground Services Alert(USA) <br /> will be notified at least 72 hours before field activities are initiated. In addition, a UPRR <br /> flagman will be scheduled to provide track protection during destruction of wells <br /> located in close proximity to active track. <br /> Page: <br /> tracy ca_maint facil_well dest wp(10-06-11).doc 2/55 <br />