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10 June 2014 AGE Project No. 14-3035 Page 5 of 16 average and reasonable usage of three to five gallons per day per person typical for a visitor to a restaurant. Staff for the proposed winery will consist of two people working a 25 hour work week (three days a week). The average and reasonable usage of 15 gallons per day per person typical for a worker at a restaurant. 4.0. GROUND WATER INFORMATION - REGIONAL HYDROGEOLOGY The Geologic Map of California, published in 1966 by the California Department of Conservation Division of Mines and Geology, shows the site area within the Great Valley Syncline (GVS), a large, elongate, northwest trending structural trough. The GVS is subdivided into two major divisions designated the Sacramento and San Joaquin Valleys, which have been filled to the present elevation with thick sequences of sediment ranging in age from Jurassic to present day, creating a nearly flat-lying alluvial plain extending from the Tehachapi Mountains in the south to the Klamath Mountains in the north. The western and eastern boundaries of this province are comprised of the California Coast Range and the Sierra Nevada, respectively. Geologically, the area around the subject property generally consists of Holocene-aged flood-basin deposits of clay, silt, and sand. Miocene to Holocene age-units are located in the surrounding area. These deposits are heterogeneous mix of generally poorly sorted clay, silt, sand, and gravel with some beds of claystone, siltstone, sandstone, and conglomerate (Page, 1986). Most of the fresh ground water in the Central Valley is contained in the post- Eocene-aged continental rocks and deposits and in the Holocene-aged river deposits consisting of gravel, sand, silt, and minor amounts of clay. In general, these geologic materials comprise a major widespread aquifer extending hundreds of feet deep and occasionally containing individual confining layers. The Modesto, Riverbank, Turlock Lake Formations and overlying recent alluvium are the principal source of domestic ground water in the 13,500-square mile San Joaquin Valley Ground Water Basin (Basin 5-22). This basin is drained primarily by the San Joaquin River, which is approximately 15 miles west of the subject property. The nearest surface water feature in the vicinity of the property is the Mokleumne River, located approximately 2750 feet southeast of the property. 4.1. GROUNDWATER DESCRIPTION FOR THE GENERAL AREA The San Joaquin County Flood Control and Water Conservation District's Lines of Equal Depth to Ground Water Spring 1999 indicates the depth to ground water is 90 feet or less. Ground water flow direction locally appears to be southeast, in the direction of the Mokleumne River. Ground water was not encountered in the 42-inch percolation test hole on 18 March 2014. Based upon a review of well permit records at EHD by an AGE representative, the total depth of domestic water wells for the surrounding area was reported to be between 95-feet and 100-feet bsg. Advanced GeoEnvironmental,Inc.