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RAMAGE ENVIRONMENTAL,INC. Post Office Box 18353 Reno, NV 89511 Tel (775) 851-7239 Fax(775)851-7240 June 19, 2015 Mr. Gabriel Gonzalez, EHS San Joaquin County EHD 1868 Hazelton Avenue Stockton, CA 95205-6232 Re: Work Plan, Well Destructions and Site Restoration Stockton Metropolitan Airport, Former Fuel Farm, 5000 S. Airport Blvd., Stockton, CA 95206 Geotracker Global ID#T0607700159, EHD Site Code: 1845 Dear Mr. Gonzalez: On behalf of the Stockton Metropolitan Airport, Chevron Environmental Management Company, and A.G. Spanos Companies, Ramage Environmental, Inc. is pleased to submit to the San Joaquin County Environmental Health Department(EHD) this work plan to complete monitoring well destruction and site restoration tasks at the subject site. EHD requested this work plan in their letter dated April 16, 2015. Planning and Permittingy To complete the well destruction scope of work, Ramage Environmental will obtain a well destruction permit from the EHD, on behalf of the drilling contractor. Since all of the site wells are on property owned by the Stockton Metropolitan Airport, neither private property access agreements nor encroachment permits will be required. At least one week prior to beginning the well destruction field work, Ramage Environmental will contact EHD and Underground Service Alert (USA) so that regulatory and underground utility clearance inspections can be scheduled. Destruction of Groundwater Monitorinsz Wells A C-57 licensed drilling contractor (driller), under the supervision of Ramage Environmental and inspection of EHD, will properly destroy the eight groundwater table monitoring wells(MW-1 through MW-8). The locations of the monitoring wells are shown on the attached site location map (Figure 1) and site plan (Figure 2). The eight site monitoring wells were last sampled on April 16, 2014. The analytical results from the groundwater sampling indicated that only MW-7 and MW-8 did not contain any petroleum compounds at concentrations above laboratory reporting limits. The cumulative groundwater analytical results are summarized in the attached table.