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PHASE II ENVIRONMENTAL SITE ASSESSMENT WORKPLAN 1025 E. MAIN STREET STOCKTON, SAN JOAQUIN COUNTY, CALIFORNIA November 26, 2007 1.0 INTRODUCTION This work plan was prepared by Condor Earth Technologies, Inc. (Condor) to describe the Phase II Environmental Site Assessment(ESA) sampling for the property located at 1025 E. Main Street(Site) in Stockton, California (Figures 1 and 2, Appendix A). The purpose of the work is to further investigate the Recognized Environmental Conditions (RECs) identified in the Phase I Environmental Site Assessment report, dated November 5, 2007, prepared by Condor. The work described herein is designed to determine: 1). If semi-volatile (SVOCs) and volatile organic constituents (VOCs) are present in groundwater beneath the Site from several off-site properties; 2) If organochlorine pesticides are present in soil around the depot building perimeter (from termite control); and if lead, arsenic, and/or petroleum hydrocarbons are present in soils from the former railroads and spur lines. The proposed work will consist of direct-push borings to collect groundwater samples, and soil sampling using hand sampling equipment from select locations at the Site. Condor prepared this work plan at the request of Mr. Thomas Reeves from the San Joaquin Regional Rail Commission(Client). All work conducted by Condor will be under the supervision of a Professional Geologist licensed by the State of California. This work plan includes project background information, a description of the field, laboratory, and reporting procedures proposed to conduct the work, and a project schedule. 2.0 PROJECT BACKGROUND Condor prepared a Phase I Environmental Site Assessment report dated November 5, 2007. The Site was historically used as a train depot from the early 1900s to the 1970s. Based on review of the Sanborn maps, prior to its development, the Site was mostly vacant land with one residence on the northern portion of the Site. Interviews with the Site owner revealed that the Western Pacific Railroad (WPRR) train depot was constructed in 1909. The current owner purchased the Site in 2003. Prior to that, the Site was used for recycled building materials storage from 2001-2003, and for a boxing club for approximately 20 years prior to that. Several rail lines and spur lines have been previously located on the Site. The western portion of the Site is currently used for vehicle and automotive parts storage. The remainder of the Site is used for an office(depot building)and storage of construction equipment. Several properties with fuel and/or oil underground storage tanks (USTs) were located within ''A mile of the Site. Some of these properties have had or may currently have identified groundwater contamination that may pose a risk to the Site. Based on the Phase I ESA, off-site properties posing the highest risk to the Site are: