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March 9, 1988 <br /> Fire Engine Company No. 2, Stockton, California AGS 038009-1 <br /> GRADIENT CALCULATIONS <br /> The ground-water gradient will be calculated in order to provide <br /> an indication of the direction of ground--water flow at the site. <br /> Measurements of elevation differences between tops cf the casings <br /> Of the wells will be made by use of an automatic level. Water <br /> depth measurements will be made with an electronic water-level <br /> indicator. These data will be combined to calculate the relative <br /> elevation of the ground-water surface in each well and the slope <br /> of the potentiometric surface across the site. <br /> FURTHER DELINEATION DRILLING <br /> If sample analyses show that contamination has extended off site, <br /> or beyond the limits defined by the monitoring wells, additional <br /> wells will be proposed and installed with the authorization of <br /> the appropriate regulatory agencies and the Department of Public <br /> Works of the City of Stockton. These wells will be located so as <br /> to fully define the extent of contamination, and will be <br /> constructed in the- same manner as the wells described above. <br /> ' Similarly, additional drilling may be required if ..the ground- <br /> water: gradient data indicate that none of the first set of wells <br /> 15 <br /> Appl etf GeoSgstems <br />