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KLEIN FELDER <br />Water level information was also obtained from the Schmidt groundwater reports in addition to <br />numerous Kleinfelder documents. Generally, during the period of the monitoring (1992 to date) <br />the groundwater elevation beneath the project site ranged from 17 to 28 feet above mean sea <br />level. The direction of groundwater flow was predominantly to the west-northwest. Historical <br />groundwater information obtained by Mr. Schmidt indicates that in 1950 depth to groundwater <br />beneath the factory was 10 feet with a direction of groundwater flow to the west. Depth to <br />groundwater in the vicinity of the site has historically ranged from 10 to 26 feet below grade, <br />with groundwater flow directions varying from due west to northwest. <br />Review of the 1985 and 1993 Ken Schmidt reports indicates that five water supply wells <br />(designated 2A, 4, 5, 6A and 7), one livestock well and one domestic well are located on site. <br />The 1985 Ken Schmidt report also describes the chemical composition of water from the water <br />supply wells on site. The groundwater was classified as a calcium -magnesium -bicarbonate type <br />water. Mr. Schmidt indicated that the water contained concentrations of iron above the <br />California Maximum Contaminant Level (MCL). The water was characterized as having high <br />hardness. Barium was detected in the wells at concentrations below the MCL. Nitrate <br />concentrations in three of the wells sampled were above the MCL. Concentrations of arsenic <br />above the MCL and elevated concentrations of manganese have been detected in the monitoring <br />wells on site. <br />The majority of the native sediments near the site consist of Miocene to Holocene continental <br />rocks and deposits of a heterogeneous mixture of generally poorly sorted clay, silt, sand and <br />gravel. Some beds of elaystone. siltstone, sandstone, and conglomerate are also present. <br />The general direction of ground eater Ilow in the area of the site, based on a report issued by the <br />San Joaquin County Flood Control and Water Conservation District, Spring 1995, is to the <br />northwest. The elevation of first groundwater is approximately 20 feet below mean sea level. <br />According to the same report, the depth to groundwater in the vicinity of the project site is <br />approximately 20 feet below grade. <br />20-3978-03.W36/2019766 Page 5 of 20 <br />© 1999. Kleinfclder, Inc. September 9, 1999 <br />