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PANGEA June 20,2013 Tom Black JTB Development jtbdeve lopmentgyahoo.com Re: Phase II Environmental Site Assessment Workplan Tracy Office Plaza 324 East 11th Street,Tracy,California,95376 Dear Mr. Black, Pangea Environmental Services, Inc., (Pangea) has prepared this Phase H ESA Workplan for the subject site. This workplan was prepared to address recognized environmental conditions (RECs) identified in the April 2, 2013 Phase I ESA prepared by AEI Consultants. Pangea understands that a Phase II will also help satisfy concerns of your prospective lender for your loan refinancing effort. Described below are the project background and the proposed work scope. Additionally, this workplan was required to obtain a drilling permit from the San Joaquin County Department of Environmental Health. BACKGROUND Based on reviewed information, the subject property was the location of a truck/auto (Chevron) station from the 1950s until 1973. Records indicate a permit was obtained in 1973 to demolish the station and remove six USTs. However, no documents confirming the removal of the USTs have been found at the San Joaquin County Department of Environmental Health (SJEH) or the Central Valley Water Quality Control Board. During groundwater monitoring associated with the adjacent downgradient site (Tracy High School), gasoline and diesel range organics were detected in monitoring wells closest to the subject property. These monitoring well locations are topographically upgradient from the leaking underground storage tank that was removed from the Tracy High School property. According to the Phase I ESA, the presence of the gasoline and diesel range organics in the upgradient Tracy High School monitoring wells suggest the plume of contamination may be originating from an upgradient property, such as the former Chevron station at 324 East 11th Street. PANGEA Environmental Services, Inc. 1710 Franklin Street#200, Oakland, CA 94612 Phone 510.836.3700 Fax 510.836.3709