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Surface &Subsurface Contamination Report Page 10 Sandhu Project Project No. 597.1 February 12, 2009 Vernalis Quadrangle and the map Lines of Equal Depth in Water Wells, which is attached to Geology of Fresh Groundwater Basin, Central Valley, California USGS Professional Paper 1401-C 1986. Based on this map the surface of groundwater is estimated to lie less than 10 feet below grade and flows in a northeasterly direction. Groundwater monitoring data from two remedial investigations in, or near, New Jerusalem, about 2 miles south of the Property suggest that locally, groundwater lies at about 13 feet below grade and flows in a northerly direction. The nearest open body of water is the San Joaquin River, adjacent to the east. The Banta Carbona Lift Canal forms the northwest boundary of the Property. According to maps in the EDR report, much of the Property lies within the 100- year flood zone, but the area does not include the existing building complex. In much of the Central Valley, the shallow groundwater contains marginally potable water, and generally the only water production wells completed opposite this zone are domestic wells. The shallow aquifer is composed of shallow sand, and silt alluvium deposited on the valley floor. Hotchkiss & Balding, in their 1971 US Geological Survey report, Geology, Hydrology. and Water Quality of the Tracy-Dos Palos Area San Joaquin Vallgy, Cali ornia, (Open File Report 72- 169) described the aquifers and their characteristics for the Tracy-Dos Palos area. In the Vernalis-New Jerusalem area, the recent alluvium is generally less than 100 feet thick and directly overlies the Tulare Formation, a Plio-Pleistocene age, mixed clastic sequence of clay, silt, sand and gravel. There is little to distinguish the contact between the base of the alluvium from the top of the Tulare Formation Petroleum Production Based on oil and gas production maps produced by the California Division of Oil, Gas and Geothermal Resources, the McMullen Ranch Gas Field lies about 1 mile east of the Property. Several exploratory gas wells were drilled near the Property, but were abandoned as dry holes. It does not appear that any petroleum production wells have ever been drilled on the Property. Federal Wetlands Based on information on the map in the EDR report (Appendix D) the Property does not include lands recognized in the federal wetlands inventory, although lands immediately adjacent along the river do include federal wetlands. i 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone: (209) 569-0293 Modesto, CA 95356 Fax: (209)569-0295