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4.0 REMOVAL ACTION IMPLEMENTATION ' The goal of the response actions presented in this SREW is, when fully implemented, to place the Site in a condition that allows it to be permanently used for its planned use without any significant risk to human health or any significant potential for future environmental damage. The response actions proposed for the Site which meet this requirement include excavation and offsite disposal of soil with COPC concentrations exceeding proposed cleanup goals. Cleanup ' goals are based on residential standards which are more conservative than the planned recreational uses and allows for unrestricted site use without further regulatory involvement. ' The following sections describe relevant aspects of the tasks required to complete the proposed removal action. ' -4.1 SITE PREPARATION,SAFETY AND SECURITY Prior to equipment mobilization, site preparation activities will be completed including the following: ' ➢ Contact Underground Service Alert(USA) at least 48 hours prior to excavation activities to identify known utilities, as required by State law ' ➢ Installation of trench plates on the access road for utility crossing protection ➢ Destruction of the existing well ➢ Removal of identified trees ➢ Field staking by Geocon of the limits of the area where soil is proposed for excavation All work is being performed by ICS. ICS is a General Engineering Contractor with hazardous ' waste and demolition endorsements, licensed in the State of California(license no. 764815 A- HAZ-C21). Access to the Site is controlled by existing fencing and a locked gate. Pacific Edge, under subcontract to ICS, will be responsible for collection of confirmation samples and ' preparation of the Completion Report. 4.2 REMEDIATION SAMPLING ' 4.2.1 Stockpile Profile Sampling Excavated soil will be profiled for disposal prior to mobilization for excavation in accordance ' with the selected disposal facility requirements. Clean Harbors, located in Buttonwillow, California, is the proposed disposal facility for both the RCRA and California hazardous waste ' streams. Existing data will be utilized to profile the excavated soil for disposal. In addition, the disposal facility has indicated that additional samples at a rate of one sample for every 250 tons should be ' collected and analyzed for the following ➢ Total lead by EPA 6010B ➢ WET soluble lead by EPA 7420 ➢ TCLP soluble lead by EPA 1311 ' +M PACIFIC EDGE ENGINEERING 7 SREW_Manteca_draft.docx (949)470-1937;(949)470-0943(FAX)