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KLEINFELDER File No. 20-3978-O1.W10 July 26, 1997 Water level information was also obtained from the Schmidt groundwater reports. In November 1992, depth to groundwater in monitoring wells installed at the site ranged from 20 to 27 feet below grade. The direction of groundwater flow was to the west-northwest,with a gradient of 13 feet/mile. Historical groundwater information obtained by Mr. Schmidt indicates that in 1950 depth to groundwater beneath the factory was 10 feet with a direction of groundwater flow to the west. Depth to groundwater in the vicinity of the site has historically ranged from 10 to 26 feet below grade,with groundwater flow directions varying from due west to northwest. Mr. Donald Schuder of the California Department of Water Resources was contacted for information regarding on site wells. Available well logs were searched for records of wells at the Spreckels site. Copies of the geologic logs for the four monitoring wells installed on site by Ken Schmidt were located. Copies of these logs were not made because they are included in the copy of the monitoring well installation report provided by Spreckels Development. Mr. Schuder was unable to locate additional well logs for the site. Mr. Schuder indicated that this does not mean that no water wells are located on the property, only that he could not locate copies of well logs. Review of the 1985 and 1993 Ken Schmidt reports indicates that five water supply wells (designated 2A, 4, 5, 6A and 7), one livestock well and one domestic well are located on site. The 1985 Ken Schmidt report also describes the chemical composition of water from the water supply wells on site. The groundwater was classified as a calcium-magnesium-bicarbonate type water. Mr. Schmidt indicated that the water contained concentrations of iron above the California Maximum Contaminant Level (MCL). The water was characterized as having high hardness. Barium was detected in the wells at concentrations below the MCL. Nitrate concentrations in three of the wells sampled were above the MCL. Concentrations of arsenic above the MCL and elevated concentrations of manganese have been detected in the monitoring wells on site. The general direction of groundwater flow in the area of the site, based on a report issued by the San Joaquin County Flood Control and Water Conservation District, Spring 1995, is to the northwest. The elevation of first groundwater is approximately 20 feet above mean sea level. According to the same report, the depth to groundwater in the vicinity of the project site is approximately 20 feet below grade. 20-3978-01.W1012017L155 Page 5 of 50 Copyright 1997,Kleinfelder,Inc.