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KL /E NFELDER 9tlgM1(Propk.PtyM1tSoluForu. The majority of the native sediments near the site consist of Miocene to Holocene continental rocks and deposits of a heterogeneous mixture of generally poorly sorted clay, silt, sand and gravel. The general depth and direction of regional groundwater flow in the area of the site, based on reports issued by the San Joaquin County Public Works Department Resources are summarized in the following Text Table 1. TEXT TABLE 1 REGIONAL GROUNDWATER ELEVATION AND FLOW DATA CALIFORNIA NATURAL PRODUCTS FACILITY ' LATHROP, CALIFORNIA ' Approximate Depth to Flow Direction of =DateGround-Water Elevation of pElevation pro ert Groundwater Groundwater (from County p y (calculated from (based on Map) (from Nolte prior 2 columns) County Map) survey) Spring 1998 8 feet msl 20 feet msl 12 feet bgs Northwest ' Fall 1998 3 feet msl 20 feet msl 17 feet bgs West Spring 1999 8 feet msl 20 feet msl 12 feet bgs Northwest Spring 2003 _ 0 foot msl 20 feet msl _ 20 feet bgs West Fall 2006 0 to 10 feet msl 20 feet msl 10 to20 feet bgs Northwest Fall 2008 0 to 10 feet msl 20 feet msl 1010 20 feet bgs Northwest msl mean sea level bgs below ground surface Groundwater depth and flow direction may be influenced by local pumping, rainfall, and t irrigation patterns. With the nearby groundwater extraction at Sharpe Army Depot, local irrigation, well pumping and recharge at CNP and other nearby properties, groundwater ' flow beneath CNP has shown varying flow directions often differing from the 'regional' flow directions summarized in Table 1 above. According to a file review of Sharpe Army Depot records on file with the California State Department of Toxic Substances Control, Sharpe has eight extraction wells for ' withdrawal of the shallow (A-Zone) water within approximately 1200 feet of the northeast corner of the CNP plant. Those wells are EWA1, EWA3, EWA5, EWA6, 101486.41ST012R025 Page 6 of 20 February 1, 2012 ' Copyright 2012 Kleinfelder