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R-1 KLEI NFELDER <br /> Water level infornhation 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 tine 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 donhestic 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. -file -roundwater was classified as a calcium-magnesiuwhn-bicarbonate type <br /> water. Mr. Schmidt indicated that the water contained concentrations of iron above the <br /> California Maxinnim Contaminant Level (MCL). The vvater was characterized as having high <br /> hardness. 13ariunn 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. Sonne beds ofelaystone. siltstone. sandstone, and conglonherate are also present, <br /> The general direction 0I'llroundwater�low in the area of tine site. based on a report issued by the <br /> San Joaquin County Flood Omtrol 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.W361201 9766 lInge 5 of 20 <br /> D 1999. Kleinfelder. Inc. September 9. 1999 <br />