ARCHIVED REPORTS PHASE II ENVIRONMENTAL SITE ASSESSMENT REPORT

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i L tl PHASE H ENVIRONMENTAL SITE ASSESSMENT REPORT 1025 EAST MAIN STREET STOCKTON, SAN JOAQUIN COUNTY, CALIFORNIA January 31,2008 L 1.0 INTRODUCTION L Condor Earth Technologies, Inc. (Condor) conducted a Phase II Environmental Site Assessment (ESA) for property located at 1025 East Main Street, located in downtown Stockton, San Joaquin County, California (Figures 1 and 2, Appendix A). The purpose of the work was to further investigate the L Recognized Environmental Conditions (RECs) identified in the Phase I ESA report, dated November 5, 2007, prepared by Condor. The evaluated properties include three parcels designated as Assessor Parcel Numbers (APNs) 151-201-02, 151-201-03, and 151-201-06 (Site), totaling 1.9 acres. The Phase II ESA L comprises a screening of site soils for the presence of petroleum hydrocarbons, arsenic, and lead from the former railroads and spur lines; a screening of site soils around the perimeter of the depot for organochlorine pesticides and lead; and a screening of groundwater for petroleum hydrocarbons, semi- volatile organic compounds (SVOCs) and volatile organic compounds (VOCs) beneath the Site. Condor conducted this work under contract with the San Joaquin Regional Rail Commission(Client). 1. 2.0 SITE BACKGROUND The following information is based on the Phase I ESA conducted by Condor. The Site was historically used as a train depot from the early 1900s to the 1970s. Based on our review of the Sanbom 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 L 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 j- used for an office(depot building)and storage of construction equipment. L Several properties with underground storage tanks (USTs) were located within ''/, mile of the Site. Some L of these properties have had or may currently have identified groundwater contamination that may pose as a risk to the Site.Based on the Phase I ESA,off-site properties posing the highest risk to the Site are: • 1102 East Weber Avenue (90 feet east of the Site) is the former location of a bulk fuel storage ` facility that operated for several decades around the 1950s. According to our file review at the San Joaquin County Environmental Health Department (SJCEHD), 15 USTs were recently removed from this property. Groundwater at this location may be impacted by petroleum hydrocarbons. • 936 East Weber Avenue (200 feet west of the Site) is the location of a former leaking gasoline UST. According to SJCEHD files, petroleum hydrocarbon-impacted soil and groundwater remains at this location. • 931 East Weber Avenue (350 feet west of the Site) is the location of the nearest groundwater boring conducted during a Phase II ESA in 2003. Groundwater contained tetrachloroethylene (PCE), a chlorinated solvent and several SVOCs. • 800 East Main Street (700 feet west of the Site) is the location of a former service station. Groundwater is impacted by petroleum hydrocarbons at this location. 1. w +i/) CONDOR L