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C7 <br />C7 <br />1.0 <br />OBJECTIVE.......................................................................................................................... <br />2 <br />2.0 <br />BACKGROUND................................................................................................................... <br />2 <br />3.0 <br />MONITORING PERIMETER NETWORK............................................................................ <br />2 <br />I. <br />SOIL GAS WELL...................................................................................................................... <br />2 <br />A. <br />Well Location.................................................................................................................... <br />2 <br />B. <br />Well Spacing..................................................................................................................... <br />2 <br />C. <br />Well Details....................................................................................................................... <br />3 <br />D. <br />Well Construction............................................................................................................. <br />3 <br />II. <br />DESIGN CONSIDERATIONS.............................................................................................. <br />3 <br />A. <br />General.............................................................................................................................3 <br />B. <br />Site Soil Conditions.......................................................................................................... <br />4 <br />C. <br />Hydrogeologic Conditions................................................................................................. <br />4 <br />D. <br />Locations of Buildings and Structures Relative to the Migration Monitoring Perimeter.... <br />4 <br />E. <br />Man -Made Pathways........................................................................................................ <br />4 <br />F. <br />Nature, Age of Waste and Potential to Generate Landfill Gas(LFG) ............................... <br />4 <br />III. <br />ON-SITE STRUCTURE MONITORING............................................................................... <br />5 <br />IV. <br />MONITORING PROCEDURES........................................................................................... <br />5 <br />A. <br />Monitoring Methods.......................................................................................................... <br />5 <br />B. <br />Frequency.........................................................................................................................5 <br />C. <br />Reporting.......................................................................................................................... <br />6 <br />i <br />Table 1 — Soil Gas Well Sampling Intervals <br />Table 2 — Soil Gas Wells - Depth <br />Figure 1 — Migration Monitoring Perimeter Boundary Site Map <br />Figure 2 — Triple Probe Soil Gas Monitoring Well <br />Figure 3 — Probe Detail -Triple Probe Soil Gas Monitoring Well <br />Figure 4 — Probe Installation Inside Well Enclosure <br />Appendix A — Gas Monitoring Data Sheets <br />Appendix B — Well Logs <br />Foothill Sanitary Landfill <br />Landfill Gas Monitoring Plan <br />June 25, 2010 <br />County of San Joaquin <br />Department of Public Works <br />Solid Waste Division <br />