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Work Plan Addendum - May 1997 <br /> Stephens Marine <br /> 345 North Yosemite Street <br /> Stockton, California <br /> 1..0. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with a request from Mr. Kent Gikas of the Union Safe Deposit Bank, Advanced . <br /> GeoEnvironmental, Inc. (AGE) has prepared the enclosed Work Plan Addendum for 345 North <br /> Yosemite Street in Stockton, California (the site). The scope of work is install five ground water <br /> monitoring wells on the site to assess the lateral and vertical•extent of hydrocarbon-impacted soil <br /> and ground water near the former underground storage tank(UST) area; to determine if migrating <br /> contaminants from the former Texaco Bulk Facility are on the site; and to determine the lateral and <br /> vertical extent of the metals impacted soil and/or ground water in the vicinity of the metals plating <br /> shop. The location of the site is illustrated in Figure 1 Location Map. A•plan.of the site is depicted <br /> in Figure 2 -Site Plan. <br /> This work plan is prepared in accordance with San Joaquin County Public Health Services - <br /> Environmental Health Division(PHS-EHD)and the Central Valley Regional Water Quality Control <br /> Board guidelines for the investigation of UST sites <br /> 2.0. BACKGROUND <br /> 2.1. SITE LOCATION <br /> The site is located in an industrial area of low topographic relief, Located '/4-mile east of the <br /> intersection of Fremont Street and Pershing Avenue at approximately 10 feet above sea level. The <br /> site is currently operated by Stephens Five Star Marine and other light industrial businesses. The <br /> surface of the site is covered with mostly asphalt or concrete. <br /> 2.2. UNDERGROUND STORAGE TANK REMOVAL <br /> It is our understanding that one underground storage tank(UST)was removed from the site in May <br /> 1986. The UST was located near the southern end of San Jose Street, south of the Fremont Street. <br /> Analytical results of soil samples collected from UST excavation indicated that an unauthorized <br /> release of hydrocarbons had occurred. A letter dated 07 March 1996 from the San Joaquin County <br /> Public Health Services - Environmental Health Division (PHS-EHD) requested further site <br /> assessment of soil and ground water in the vicinity of the former UST prior to granting certified site <br /> closure. <br />