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0 1.0 OBJECTIVE <br />The objective of this Gas monitoring and Control Program Plan is to verify compliance with <br />California Code of Regulations Title 27, §20919 for Gas control at the Foothill Sanitary <br />Landfill (FSL). <br />FSL is a single Class III Waste Management Unit located in eastern San Joaquin County at 6484 <br />N. Waverly Road, four miles east of Linden, CA. The property size of FSL is approximately 800 <br />acres. The permitted refu'se fill area of FSL is approximately 674 acres with a 200 ft offset from <br />the property boundary. Land uses within 1,000 feet of the facility are agricultural. <br />Waste discharged to the landfill includes commercial and household waste, construction/ <br />demolition waste and agricultural waste. Future modules will be constructed when needed. <br />Currently there is one filled unlined module (Module "I") and one lined Module (Module 1) <br />currently being filled (Figure 1). <br />The designed refuse elevation of FSL is 180 feet above mean sea level (MSL). Site terrain <br />elevation varies at FSL. The northern side of the site is hilly and higher in elevation while the <br />eastern and southern side of the site is lower in elevation. <br />3.0 MONITORING PERIMETER NETWORK <br />The proposed monitoring perimeter well network within the property boundary of FSL is <br />established in accordance with Title 27 Section 20925. <br />SOIL GAS WELL <br />The monitoring well perimeter network of FSL consists of 25 soil gas wells. Well SG -12 <br />installed in 2004 and 24 other wells installed in 2009 (Figure 1). These wells are FSL's point <br />of compliance for off-site migration of methane. All perimeter soil gas monitoring wells are <br />triple nested probes (Figures 2, 3 and Appendix B). <br />A. Well Location <br />All soil gas wells are located outside the limit of refuse (Figure 1). <br />B. Well Spacing <br />The lateral spacing of monitoring perimeter soil gas wells is less than 1000 feet <br />(Figure 1). Location of soil gas wells were staked by a licensed. <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 />