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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 />' four monitor wells (MW-1, MW-2, MW-3, and MW-5) located at the former Union Ice facility at <br /> 425 North Union Street, Stockton, California (Figure 1) This report presents the results of the <br />' water level measurements and the chemical analyses A summary of the site background, <br /> previous soil and groundwater analytical results, and remedial efforts were presented in our <br />' "Soil and Groundwater Investigation Report' (ICF Kaiser, 1994) <br />' 2.0 WATER-LEVEL MEASUREMENTS <br />' Water-level measurements were recorded in Wells MW-1, MW-2, MW-3, and MW-5 on <br /> February 1, 1995 Measurements were recorded using an electric water-level probe <br /> graduated in 0 02-foot increments Water level elevations were calculated based on the <br />' results of a level survey performed on October 31, 1994 to determine reference elevations of <br /> each well The lowest point on the open well casing is marked and was surveyed as the <br /> reference point for the water level measurements Figure 2 presents the potentiometnc <br /> surface as measured on February 1, 1995 <br /> 1 <br /> The well elevation and depth to groundwater data are presented in Table 1 <br />' Groundwater elevations, measured on October 7, 1993 and October 18, 1994, are included in <br /> the table to illustrate the increase in the elevation of the potentiometric surface On average, <br />' the potentiometric surface elevation increased 5 6 feet from October 1993 through February <br /> 1995 The groundwater flow direction is to the northeast with an approximate gradient of <br />' 0 003 ft/ft (Figure 2) <br />' 3.0 GROUNDWATER MONITORING WELL SAMPLING <br /> On February 1, 1995, groundwater samples were collected from monitor wells MW-1, <br />' MW-2, MW-3, and MW-5 Each well was purged of approximately 3 well-casing volumes <br /> using a clean Teflon* bailer The purge water was collected and placed into a DOT approved <br /> 55-gallon storage drum The purge bailer was thoroughly cleaned with Alconox and triple <br /> rinsed with distilled water prior to its use in each well <br /> -kU--cC\Wqtr 95r <br /> 1 <br />