WORK PLANS - Laserfiche WebLink

Home Browse Search

Additional Site Assessment Work Plan ENTERPRISE INVESTMENTS (Former J.B. Murphy Trucking) 355 Enterprise Place, Tracy, California 1.0. INTRODUCTION At the request of Mr. Monty Warren of Enterprise Investments,Advanced Geo Env iron menta 1, Inc. (AGE)has prepared the enclosed Additional Site Assessment Work Plan for the property located at 355 Enterprise Place,Tracy,California.The scope of work includes soil probe boring advancement, soil and ground water sample collection and analysis, and boring abandonment. The location of the site is illustrated on Figure 1. Plans of the site, the surrounding area, including proposed boring locations, are illustrated on Figure 2. This work plan is prepared in accordance with Central Valley Regional Water Quality Control Board (CV RWQCB) guidelines for the subsurface investigation of underground storage tank (UST) sites. 2.0. BACKGROUND The site is located in a commercial/industrial area of north Tracy, California, at an estimated elevation of 5 feet above mean sea level (MSL). The site is presently occupied by Jimeo Construction and Rerailing. The site is located on the north side of Enterprise Place. The major portion of the site consists of an unpaved dirt area used as a parking lot for trucks.A two-story office facility and truck garage are presently located on the site. 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is located within the northern San Joaquin Valley,which comprises part of the Great Valley geomorphic province of California. The San Joaquin Valley is formed by the Great Valley geosyneline, 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 more than 20,000 feet in the south central portion of the valley. The sedimentary formations vary in age, with the older deposits being primarily marine in origin and the younger deposits continental. Continental-derived sediments were typically deposited in lacustrine, fluvial, and alluvial environments with sediment sources being the mountain ranges surrounding the valley (Olmsted and Davis, 1961). 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 groundwater in the 13.500-square mile San Joaquin Valley Ground Water Basin (Basin 5-22). Advanced GeoEnvironmental,Inc.