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GROUNDWATER FLOW DIRECTION <br /> Groundwater elevations were measured in monitoring wells MW-1, MW-2R, and MW-3 during <br /> the first and second quarters. Groundwater was determined to flow towards the southwest <br /> (Figures 3 and 4). The groundwater gradient is 0.00195 foot per foot, calculated from the drop in <br /> water elevation from 48.0 feet to 43.0 feet MSL over a distance of 2,560 feet. <br /> STANDARD OBSERVATIONS <br /> Regular site inspections were performed during the first semester of 2004. Monthly standard <br /> observations have been compiled(Appendix G). Signatures on the forms certify that all <br /> observations were performed and are accurate. <br /> RUN-OFF/RUN-ON FACILITIES <br /> h to control run-on and run-off. The natural <br /> The Foothill Sanitary Landfill utilizes several methods <br /> topography of the area controls any run-on into the site. Also, the working area is a significant <br /> distance from the property boundary, so run-on from surrounding properties is minimal. To <br /> control run-off, a perimeter ditch along the north,west and east ends of the unit directs all storm <br /> water run-off into a sedimentation basin on the east side of the site. The rest of the run-off from <br /> the unit gathers into a temporary sedimentation basin that is the excavation of a future module. <br /> There were no breeches to any of the run-on/run-off facilities during this monitoring period..They <br /> will continue to be monitored in the future. <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 considered a point of compliance, as stated in the <br /> WDRs. Results are included. <br /> LEACHATE COLLECTION AND RECOVERY SYSTEM - PROCEDURES & <br /> MAINTENANCE <br /> Facilities <br /> The leachate collection and recovery system(LCRS) for Module 1 was designed in accordance <br /> with Title 27, Section 20340(g). This system consists of: <br /> ■ East/west oriented collection troughs running the entire length of Module 1 <br /> ■ A 4-foot deep sump at the southeast comer of the Module <br /> Foothill Sanitary Landfill 8 Department of Public Works/Solid Waste <br /> 1ST Semester 2004 Groundwater Monitoring County of San Joaquin-July 27,2004 <br />