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1 GROUNDWATER FLOW DIRECTION <br /> Groundwater levels were measured in monitoring wells MW-1, MW-2, and MW-3, on April 30, <br /> 1 2001. Groundwater flow, as shown in figure 2, is inferred to be toward the southwest. The <br /> groundwater gradient is 0.0017 foot per foot, and it was calculated by dividing the difference in <br /> 1 elevation between the 49.0 and 51.0 foot contours(2.0 feet),by the measured distance between them <br /> (1170 feet). <br /> STANDARD OBSERVATIONS <br /> 1 <br /> Weekly site inspections have been performed during the second quarter of 2001 and in prior quarters. <br /> 1 A summary of the weekly observations for the quarter can be found on the form in Appendix F. A <br /> signature on the form is the certification that all observations were performed and are accurate. <br /> 1 RUN-OFF/RUN-ON FACILITIES <br /> The Foothill Sanitary Landfill utilizes several methods to control run-on and run-off. The natural <br /> 1 topography of the area works to control any run-on into the site. Also, the working area is a <br /> significant distance from the property boundary,so run-on from surrounding properties is minimal. <br /> To control run-off,a perimeter ditch along the north and east ends of the unit direct all storm water <br /> 1 run-off into a sedimentation basin on the east side of the site. The rest of the run-off from the unit <br /> gathers into a temporary sedimentation basin that is the excavation of a future module. During the <br /> second quarter of 2001 there were no breeches to any of the run-on/run-off facilities, and they will <br /> continue to be monitored in the future. <br /> N:\A4ichael\FH\GWmon\2ndOlrep.wpd <br /> ! <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 7 <br /> 1 <br />