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0 Q Limited Soil Sampling Work Plan anteagroup 1080 Wildlife Avenue Stockton, California 1.0 INTRODUCTION Antea®Group has prepared this work plan to conduct a limited soil sampling investigation for the site located at 1080 Wildlife Avenue,Stockton,California(Figure 1). 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 1 mile north of the intersection. As a follow up to a recent Limited Phase I Environmental Site Assessment(ESA)conducted at the subject site,Antea Group plans to complete 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 the January 2014 Limited Phase I ESA. This planned investigation focuses 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. Planned activities at the site include a site walk, utility clearance, shallow soil boring advancement,and soil sampling/analyses. 2.0 SITE BACKGROUND In January 2014, Antea Group completed a Limited Phase I ESA for the subject site. The report concluded that based on the available historical information dating back to 1906,the subject site was undeveloped/vacant since at least 1913. The property use has primarily been undeveloped and vacant, but has included limited industrial operations since at least the early 1950s. Industrial operations at the site have included the following(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. The recent Limited Phase I ESA revealed the following recognized environmental conditions(RECs), as defined by the American Standard for Testing and Materials (ASTM) standard E1527-05, in connection with the subject property: • The subject site and adjacent properties include various historic operations dating back to the mid-1940s associated with the United States Navy. Historical documents report that former operations include landfill and disposal operations,aboveground storage tank yards, railroad storage yards,clothing disposal pits that may have contained radioactive materials,and hazardous materials storage yards,among others. 1 www.anteagroup.com