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from the Vernalis plant (Hall and Faulkner), one onsite (South Tracy#1), and two downgradient <br /> (Brown's New and Brown's#1), with an additional water-quality well upgradient from the Vernalis <br /> plant (Koster) that is sampled periodically (depending on the availability of an engine for the pump) <br /> (Figure 1). <br /> In regard to the water-level monitoring, the twelve network wells encompass the seven parcels <br /> permitted for mining in an area approximately two miles west to east and three miles north to south <br /> in order to allow for the assessment of ground-water flow directions. <br /> The Hall and Faulkner wells are shallow domestic wells and are tested for general minerals, nitrate, <br /> and total coliform bacteria. The Koster well is an irrigation well and the South Tracy#1 and two <br /> n <br /> Brown's wells are deep production wells, all of which are tested for general minerals and nitrate. <br /> The remainder of the network wells are irrigation wells, excluding the Rustan domestic well, and are <br /> usually monitored for water levels only. <br /> At each well in the monitoring network, the elevations of the ground surface and well head were <br /> surveyed by LSCE in November and December, 1994. Ground surface and well head elevations <br /> were referenced to several local bench marks (DWR, USBR, and San Joaquin County) relative to the <br /> USGS datum. The survey was conducted so that measured ground-water depths could be equated to <br /> ground-water elevations that, in turn, could be used to define ground-water flow directions beneath <br /> the area. <br /> 4 <br /> QLUHOORFF & SCALMANINI <br /> /.. <br /> CONSULTING ENGINEERS <br /> d <br />