ARCHIVED REPORTS_LIMITED PHASE 2 SOIL REPORT

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Q anteagroup Limited Phase 11 Subsurface Investigation Report Union Pacific Railroad Property Lease Port of Stockton 1080 Wildlife Avenue, Stockton, California 1.0 INTRODUCTION Antea°Group has completed this Limited Phase 11 Soil Investigation Report for the subject property located at 1080 Wildlife Avenue at Rough and Ready Island of the Port of Stockton in the City of Stockton, County of San Joaquin, California (Figure 1). Antea Group completed the scope for this limited subsurface sampling event in general accordance with the March 6, 2014 Limited Soil Sampling Work Plan prepared for San Joaquin County Environmental Health Department(SJCEHD). Antea Group completed this limited soil sampling investigation to establish subsurface contaminant concentrations in areas of planned construction/excavation areas where there are shallow soil analytical data gaps, as well as to evaluate potential environmental concerns (PECs) identified in Antea Group's January 22, 2014 Limited Phase I Environmental Site Assessment (ESA). This investigation focused on soil sampling in areas where soil will be displaced for site improvements, including rail line installation and subsurface utility installation, associated with construction of the rail welding facility. Activities at the site included a site walk, utility clearance, shallow soil boring advancement,and soil sampling/analyses. 2.0 SITE BACKGROUND 2.1 Site Description The subject site is located at 1080 Wildlife Avenue property on Rough and Ready Island of the Port of Stockton located in the City of Stockton, County of San Joaquin, California (subject site). The subject property (assessor's parcel number 162-030-01) encompasses approximately 40 acres in the western portion of Rough and Ready Island, Port of Stockton. The subject property is located approximately 800 feet northwest of Fyffe Street and Humphreys Drive, and extends approximately one mile north of the intersection. 2.2 Previous Environmental Activities In January 2014,Antea Group completed a Limited Phase I ESA for the subject site.The report concluded that the site was undeveloped/vacant since at least 1913 (with historical evidence dating as early as 1906). The property use has primarily been undeveloped/vacant, but does include limited industrial operations from the 1950s as follows) all dates are approximate: • From at least 1952 to present— railroad operations (as suggested by the railroad tracks present prior to 1952). • 1950s to present—piping storage yard in the northern part of the subject site and extending off-site. 1 www.anteagroup.com