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Advanced <br /> An Employee-Owned Company <br /> 11 January 2021 <br /> Project No. 20-6274 <br /> Mr. Michael Kith <br /> San Joaquin County Environmental Health Department <br /> 1868 E. Hazelton Avenue <br /> Stockton, CA 95205 <br /> Via Email: mkith sjgov.org <br /> Subject: Limited Phase II Site Assessment Work Plan <br /> PARDEE INDUSTRIAL DRIVE LLC <br /> 1010 Industrial Drive, Stockton, California <br /> Dear Mr. Kith: <br /> AdvancedGeo, Inc. (AGI) has prepared this Limited Phase 11 Site Assessment Work Plan <br /> for the property located at 1010 Industrial Drive, Stockton, California (site or subject <br /> property). The scope of work includes advancement of eight (8) soil borings for the <br /> collection of soil and groundwater samples. <br /> This work plan has been prepared as required by the San Joaquin County Environmental <br /> Health Department (EHD) application for a boring/well permit. The site and surrounding <br /> area are illustrated in Figure 1. On-site structures, the former aboveground storage tank <br /> (AST) areas, and the proposed soil boring locations are illustrated in Figure 2. <br /> 1.0. INTRODUCTION AND BACKGROUND <br /> During performance of a Phase I Environmental Site Assessment prepared for the <br /> property, AGI identified the property as a former chemical packaging and distribution <br /> facility. Chlorine and corrosive chemicals were previously loaded from railcars to ASTs at <br /> three locations on the east side of the warehouse building. The loading areas were not <br /> within secondary containment structures. Staining was observed on the soils and railroad <br /> ties at the loading areas. The staining appeared to be evidence of incidental spills that <br /> have occurred during transloading activities. Spills of acid can result in elevated <br /> concentrations of chloride, nitrate, phosphate, and sulfate in the groundwater, however, <br /> only nitrate is regulated as a primary drinking water standard. Additionally, spills of <br /> corrosive chemicals may cause naturally occurring metals in the soil to mobilize and <br /> impact groundwater quality. One AST area and three sumps were also identified inside <br /> the warehouse building. <br /> 837 Shaw Road • Stockton, CA 95215 <br /> Telephone (800) 51 1-9300 • Fax (888) 445-8786 <br />