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Site Assessment Work Plan - August 2018 STOCKTON REDEVELOPMENT AGENCY PROPERTY 1501 South Airport Way & 1670 South Union Street, Stockton, California 1.0. INTRODUCTION Advanced GeoEnvironmental, Inc. (AGE) has prepared this Work Plan for the site located at 1501 South Airport Way & 1670 South Union Street, Stockton, California (site). The scope of work includes the advancement of five (5)-paired soil borings for the collection of soil-vapor samples, collection of grab groundwater samples and preparation of this report. This work plan was prepared in accordance with Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of petroleum related sites. This work plan has been prepared as required by the San Joaquin County Environmental Health Department (EHD) application for drilling permit. This investigation is being conducted as part of a potential property transfer. The location of the site is presented on Figure 1 and a plan of the site with proposed soil boring locations is presented on Figure 2. 2.0. SCOPE OF WORK AGE completed a Phase I Environmental Site Assessment for the subject property in January 2017. Based on findings, the Phase I identified the possible presence of groundwater contamination from off-site sources. As a result, a soil-vapor and groundwater investigation is being conducted at the site as part of a property transfer. The following basic tasks include: • Permitting and pre-field work activities. • Advancement of five (5) paired soil probe borings to maximum depths of 50 feet below surface grade (bsg) for collection of soil-vapor and grab groundwater samples. • Report preparation. Each of these tasks is described in greater detail below. 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be obtained, including boring/drilling permits from the EHD. Also, a site-specific Health and Safety Plan will be prepared. Prior to mobilization, each soil probe boring location will be clearly marked and a utility clearance Advanced GeoEnvironmental,Inc.