Laserfiche WebLink
I <br /> k%J KLEINFELDER i <br /> The depositional environments within the Great Central Valley are often <br /> either fluvial or deltaic. Permeable units of these unconsolidated <br /> sediment sequences yield variable quantities of ground water with variable <br /> quality. This investigation focuses on the near-surface unconsolidated <br /> sediments of the Great Central Valley. <br /> 2.1.3 Site Geology <br /> Review of boring logs from water wells in the Stockton area indicate <br /> on-site geological conditions for the upper 100 feet of strata should <br /> consist of stream deposited sands, silts and clays. Based on the <br /> lithology logs and using the location of present-day rivers and deltas, <br /> the former depositional environment was probably interdistributary bay or <br /> flood plain. <br /> Near-surface sediments (0 to 80-feet) below the project site should <br /> exhibit several of the following characteristics: <br /> o Unconsolidated sediments <br /> o Lack of bedding strictures <br /> o Grain size: generally fine grained clays, silts, and sand <br /> indicating law energy depositional process <br /> o Lack laterally extensive thick clay units <br /> o Lithologic unit transitions <br /> o Site topography flat, no relief <br /> o Hard pan or cemented sand 20 to 40-feet below ground surface <br /> 45-88-01 4 <br />