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GROUNDWATER FLOW DIRECTION <br /> Groundwater levels were measured in monitoring wells MW-1,MW-2,and MW-3,on July 7, 1999. <br /> Groundwater flow, as shown in figure 3, is inferred to be toward the southwest. The groundwater <br /> gradient is 0.0018 foot per foot,and it was calculated by dividing the difference in elevation between <br /> the 49 and 51.5 foot contours (2.5 feet), and dividing by the measured distance between them <br /> (1396.2 feet). <br /> STANDARD OBSERVATIONS <br /> Weekly site inspections have been performed during the third quarter of 1999 and in prior quarters. <br /> 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 /> RUN-OFF/RUN-ON FACILITIES <br /> The Foothill Sanitary Landfill utilizes several methods to control run-on and.run-off. The natural <br /> 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 /> 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 /> third quarter of 1999 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 /> sAwes\fh\gwmon\_3-99rep.wpd <br /> 1 <br /> ' 7 <br />