Laserfiche WebLink
Additional Site Assessment Work Plan <br /> _. WEST CLAY PROPERTIES <br /> 639 West Clay Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of West Clay Properties-KRC, Advanced GeoEnvironmental, Inc. (AGE) <br /> has prepared this Additional Site Assessment Work Plan for the site located at 639 <br /> West Clay Street, Stockton, California (site). <br /> The scope of work includes advancement of three, and potentially four, soil probe <br /> borings for the collection of deep groundwater samples; and the installation of three <br /> deep-screened (40-60 feet below surface grade: bsg) groundwater monitoring wells to <br /> define the down-gradient extent of petroleum hydrocarbon-impacted groundwater in <br /> y Hydrogeologic Unit 2 (HU2). The work plan provides a description of the scope of work <br /> and procedures to be used for soil probe and pilot boring advancement, groundwater <br /> sample collection and analysis, monitoring well development and survey, and boring <br /> abandonment. <br /> A location map depicting the site and surrounding area is provided in Figure 1; a site <br /> map depicting site features and proposed soil boring and monitoring well locations is <br /> presented in Figure 2. <br /> The work plan was prepared as directed by San Joaquin County Environmental Health <br /> Department (SJCEHD) letter, dated 30 January 2015 (Appendix A). <br /> This work plan was prepared in accordance with guidelines issued by the California <br /> Regional Water Quality Control Board (CRWQCB) for investigation of underground <br /> storage tank (UST) sites. <br /> 2.0. BACKGROUND <br /> The site is located in the western-central portion of Stockton, CA, in an area of mixed <br /> residential and business. The site is located 130 feet west of the intersection of West <br /> Clay Street and Harrison Street and is one parcel out of the seven adjacent parcels that <br /> are owned by the Knife River Corporation (Figure 2). <br /> 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING <br /> The property is situated within the Great Valley Geomorphic Province of California; a <br /> large, elongate, northwest trending, asymmetric structural trough. The Great Valley <br /> Province has been filled with thick sequences of sediment ranging in age from Jurassic <br /> to Recent, creating a nearly flat- lying alluvial plain that extends from the Tehachapi <br /> Advanced GeoEnvironmental Inc. <br />