ARCHIVED REPORTS_XR0010542 - Laserfiche WebLink

Home Browse Search

iAdditional Site Assessment Work Plan SUTTER OFFICE CENTER 242 North Sutter Street, Stockton, California 1.0. INTRODUCTION AND SCOPE OF WORK At the request of Ms Juli Lozano of the SUTTER OFFICE CENTER,Advanced GeoEnvironmental, Inc has prepared this work plan for additional soil and gi ound water Investigation at 242 North Sutter Street in Stockton, California The scope of work Includes Installation of up to six soil borings using CPT technology to characterize lithology, assess the vertical and lateral extent of impacted soil and gi ound watel, and model potential contaminant migration pathways at the site The site location is illustrated in Figure 1, a site plan is depicted in Figure 2 This Work Plan has been prepared as iequired by the San Joaquin County Environmental Health Department (EHD) by letter dated 03 September 2002, the plan was prepared in accordance with Centi al Valley Regional Water Quality Conti of Board (CVRWQCB) guidelines fol the subsurface Investigation of underground stoi age tank (UST) sites 2.0. BACKGROUND AND SITE LOCATION • The site is located in a commercial area of low topographic relief in central Stockton, California. There is one multistory building (242 North Suttei Street) occupied by multiple businesses on the western portion of the site, the i emaining portion consists of paved parking 2 1 REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Gi eat Valley Geomorphic PI ovince of California, a laige, elongate, northwest tiending, asymmetric structural tiough, the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys, respectively The Province is bordered by the Coast Ranges to the west, the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east The Gleat Valley has been filled with sediments derived fiom both marine and continental sources Thickness of the sedimentary fill i anges from thin veneei s along the valley edges to more than 20,000 feet in the south centi aI portion of the valley The sedimentary formations range in age from Jurassic to Recent, with the older deposits being primarily marine in origin and the younger deposits being primai ily continental Continental-derived sediments were primarily deposited in lacusti me, fluvial, and alluvial envii onments with sediment sources being the mountain ranges surrounding the valley (Olmsted and Davis, 1961), the site itself is located on unconsolidated and semi-consolidated alluvium, Iake, playa and terrace deposits of Quaternary age (California Division of Mines and • Geology, 1977) Rocks composing the basement complex of the Province have not been completely defined but are believed to be metamorphic and igneous in origin Advanced GeoEnvironmental,Inc