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Determination of the Direction of Groundwater Flow <br /> and <br /> Flow Rate <br /> at the <br /> Pestana Trust Property <br /> 2360 East Street , Tracy, CA <br /> Relative wellhead elevations for the three on-site <br /> groundwater monitoring wells (MW-1 , MW-2 , and MW-3 ) were <br /> previously determined and reported by WaterWorks , Inc of <br /> Escalon These elevations and depths to groundwater <br /> measured by EPM on Decembere 2 , 1993 were used to determine <br /> groundwater elevations for the fourth quarter of 1993 <br /> The flow of water in a saturated porous medium such as soil <br /> is defined by Darcy ' s Law This law states that under <br /> saturated conditions , the volume of water flowing per unit <br /> area , per unit time (Q/At=v) is directly proportional to <br /> the product of hydraulic conductivity (K) of that soil and <br /> the hydraulic gradient ( h/L ) , <br /> v=K h/L <br /> Measurements acquired at the site appear in Table 1 <br /> Table 1 <br /> Well Head Elevations , Depths to Groundwater , and <br /> Groundwater Elevations at 2360 East Street , Tracy <br /> on December 2 , 1993 <br /> Well Head Depth to Relative Groundwater <br /> Well Elevation Groundwater Elevations <br /> Number ( ft ) ( ft ) ( ft ) <br /> ------ ----------------------------------------------------- <br /> MW-1 69 73 7 20 62 53 <br /> MW-2 69 65 6 85 62 . 80 <br /> MW-3 69 61 6 40 63 21 <br /> By employing the well head elevations and depths to water <br /> in monitoring wells MW-1 , MW-2 , and MW-3 , groundwater <br /> elevations were calculated Groundwater contours were <br /> drawn by interpolation of the groundwater elevations As <br /> shown on Figure 3 of this report , groundwater flow is <br />