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Advanced <br /> GeoEnvironmental <br /> Inc . <br /> 26 September 2014 <br /> AGE Project No. 13-2675 <br /> Mr. Johnny Yokum <br /> San Joaquin County Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Subject: Phase II Site Assessment Work Plan Addendum <br /> PIMENTEL PROPERTY <br /> 1650 South EI Dorado Street, Stockton, California <br /> Dear Mr. Yokum: <br /> At the request of Mr. Ernesto Renteria, Advanced GeoEnvironmental, Inc. (AGE) has <br /> prepared this Phase 11 Site Assessment Work Plan Addendum for the site located at <br /> 1650 South EI Dorado Street, Stockton, California (site). The work plan provides <br /> procedures for the collection of soil, groundwater, and soil-vapor samples at the subject <br /> site. A site plan depicting the proposed boring locations is illustrated in Figure 1. <br /> INTRODUCTION AND BACKGROUND <br /> Historical information available for the site address indicates that a dry cleaning facility <br /> was formerly located in the eastern portions of the site from approximately 1911 until <br /> approximately 1960. Furthermore, historical Sanborn Fire Insurance maps for the site <br /> indicate the presence of potential in-ground fuel tanks located in the east-central portion <br /> of the site; as well as a steaming room or steam generator in the central portion of the <br /> site. <br /> Based on the historical information reviewed, AGE performed a limited subsurface <br /> investigation at the site. On 30 October 2013, AGE advanced three soil borings (131 <br /> through 133) at the subject property. Soil borings B1 and B2 were advanced in the <br /> location of the former dry cleaning facility and B3 was advanced in the location of the <br /> former potential in-ground petroleum tanks; B1 through B3 were advanced to depths of <br /> approximately 30 feet below surface grade (bsg) for soil sample collection and depths of <br /> 38 feet bsg for groundwater sample collection. Soil boring locations are illustrated in <br /> Figure 1. The following is a summary of the findings from the October 2013 <br /> investigation. <br /> 837 Shaw Road• Stockton,CA 95215 <br /> Telephone(209)467-1006• Fax(209)467-1118 <br />