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1.0 INTRODUCTION <br /> On behalf of the Union Ice Limited Partnership, ICF Kaiser Engineers, Inc (ICF KE) <br />' measured groundwater levels and collected groundwater samples for chemical analysis from <br /> five monitor wells (MW-1,-2,-3,-4 and -5) at the former Union Ice facility at 425 North Union <br />' Street, Stockton, California (Figure 1), as part of a required quarterly monitoring program <br /> This report presents the results of the water level measurements and the chemical analyses <br /> A summary of the site background, previous soil and groundwater analytical results, and <br />' remedial efforts is presented in ICF KE's "Soil and Groundwater Investigation Report" (ICF <br /> Kaiser, 1994) <br /> 2.0 WATER-LEVEL MEASUREMENTS <br /> Water-level measurements were recorded for Wells MW-1, MW-2, MW-3, MW-4, and <br /> MW-5 on April 25, 1995 Measurements were made using an electric water-level probe <br /> graduated in 0 02-foot increments The lowest point on the open well casing is marked and <br /> was surveyed as the reference point for the water level measurements Water level elevations <br /> were calculated based on the results of a level survey performed on October 31, 1994 to <br />' determine reference elevations of Wells MW-1, -2, -3, and -5 Figure 2 presents the <br /> potentiometric surface as measured on April 25, 1995 Well MW-4 was not surveyed in <br />' October 1994, and the water level elevation measured in this well was not used to prepare <br /> the map of the potentiometric surface (Figure 2) <br />' The most recent and selected historical groundwater measurements are presented in <br /> Table 1 The elevation of the potentiometric surface increased an average of 8 49 feet from <br />' October 1993 through April 1995 The direction of groundwater flow is to the northeast with a <br /> horizontal hydraulic gradient of approximately 0 003 foot/foot (Figure 2) <br /> 1 <br /> w.wv ss I <br />