ARCHIVED REPORTS_XR0004995 - Laserfiche WebLink

Home Browse Search

• Site Background Information LOCAL FOOD STORE 2650 Monte Diable Avenue, Stockton, California The site is located in a commercial/residential area of very low topographic relief, sloping gently toward the west(Figure 1)at or near sea level The majority of the site consists of a paved area One building, containing an office and a mini mart are located on the property(Figure 2) The surrounding sites are used for residential use and right-of-way road ways are located north and west of the site No public supply wells are located on the property REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is located within the northern San Joaquin Valleywhich comprises part of the Great Valley geomorphic province of California The San Joaquin Valley is formed by the Great Valley geosyncline, which is a large, elongate,northwest-trending asymmetrical structural trough(basin) It 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 This trough has been filled with sediments derived from both marine and continental sources Thickness of the sedimentary fill ranges from thin veneers along the valley edges to greater than 20,000 feet in the south central portion of the valley The sedimentary formations range in age with the older deposits being primarily marine in origin and the younger deposits being primarily continental Continental-derived sediments were primarily deposited in lacustrine, fluvial, and alluvial environments with sources being the mountain ranges surrounding the valley(Olmsted and Davis, 196 1) The site is located on unconsolidated and semi- consolidated alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and Geology, 1977) The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground Water Basin (Basin 5-22) Based on the San Joaquin County Flood Control District and Water Conservation District Lines of Equal Depth to Ground Water Fall 1998 map, the estimated depth to ground water in the vicinity of the site is between 10 and 20 feet below surface grade (bsg) During the UST removal, ground water was encountered at a depth of approximately 10 feet bsg Based upon data obtained from nearby sites, the prevailing ground water flow direction in the vicinity of the site is estimated to be north However, flow direction may be both locally and seasonably variable The Stockton Deep Water Channel is the nearest surface water feature to the property,located approximately 750 feet west of the site Water from the channel drains into the San Joaquin River and is pnmanly used for commercial and recreational boating,with agricultural usage as a secondary use The channel contains water continually and has a potential tidal effect upon ground water depth or flow direction in the area