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GROUNDWATER DIRECTION AND FLOW RATE <br /> Groundwater elevations were measured in monitoring wells during the third and fourth quarters. <br /> Groundwater was determined to flow towards the east-southeast(Figures 3 and 4). The calculated <br /> average linear groundwater flow velocity in the third quarter was 112.2 feet per year based on a <br /> hydraulic gradient of 0.0033 foot per foot. The calculated average linear groundwater flow <br /> velocity in the fourth quarter was 117.1 feet per year based on a hydraulic gradient of 0.0034 foot <br /> per foot(Appendix G). <br /> STANDARD OBSERVATIONS <br /> Regular site inspections were performed during the second semester of 2010. Monthly standard <br /> observations have been summarized(Appendix H). The electronic signatures on the forms certify <br /> that all observations were performed and are accurate. <br /> RUN-OFF/RUN-ON FACILITIES <br /> FSL utilizes several methods to control run-on and run-off. The natural topography of the site <br /> controls any run-on into the site. Also,the working area is a significant distance from the property <br /> boundary, so run-on from surrounding properties is minimal. <br /> To control run-off, a perimeter ditch along the north,west and east ends of the unit directs all <br /> storm water run-off into a sedimentation basin on the east side of the site. The rest of the run-off <br /> from the unit gathers into a sedimentation basin at the southeast corner of Module 1. There were <br /> no breeches to any of the run-on/run-off facilities during this monitoring period. <br /> OTHER ANALYSIS <br /> Groundwater samples were collected from landfill supply well LW-1 and analyzed for all <br /> monitoring and field parameters. The well is not a point of compliance, as stated in the WDRs. <br /> Foothill Sanitary Landfill 10 Department of Public Works/Solid Waste <br /> 2"d Semester and Annual 2010 Groundwater Monitoring County of San Joaquin—January 31,2011 <br />