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3 MONITORING AND LANDFILL GAS CONTROL <br />Groundwater and Surface Water Monitoring <br />Components: Quarterly Groundwater Monitoring at 8 wells plus two stormwater outlet locations. <br />Annual Sampling, Testing, and Reporting sample 6,590$ 24 158,160$ <br />Subtotal, Annual Monitoring Cost 158,160$ <br />Five-Year Monitoring and Report of Constituents of Concern Analysis <br />Components: This is a five year requirement that is included above. LS -$ 1 -$ <br />Subtotal, Five-Year Monitoring -$ <br />Annual Cost, 1/5 -$ <br />Groundwater Monitoring Well Repairs <br />Components: Well Repairs, including replacement of the protective steel covers twice over 30 yrs. on all groundwater monitoring <br />wells. <br />Steel Covers ea.100$ 24 2,400$ <br />Keyed-alike Locks ea.25$ 24 600$ <br />Misc. Supplies (i.e. cement, paint, etc.)ea.250$ 24 6,000$ <br />Field Technician(Environmental Specialist)hr.153.00$ 72 11,016$ <br />Project Manager/Engineer/Geologist hr.224.00$ 16 3,584$ <br />Subtotal Groundwater Well Maintenance and Repairs 23,600$ <br />Landfill Gas Monitoring <br />Components: Quarterly Landfill Gas Monitoring and Reporting <br />Surface Emission Monitoring ls 69,831$ 1 69,831$ <br />Sampling and Reporting ls 7,201$ 1 7,201$ <br />Testing ls 9,053$ 1 9,053$ <br />Subtotal, LFG Monitoring Event 86,085$ <br />Landfill Gas System Operation and Maintenance <br />Components: Annual system and monitoring probe maintenance and repairs. <br />Landfill Gas System Maintenance and Operation ls 1,812,995$ 1 1,812,995$ <br />Subtotal Landfill Gas System Maintenance and Operation 1,812,995$ <br />Vadose Zone Monitoring <br />Components: Annual Vadose Zone Monitoring and Reporting <br />Sampling and Reporting ea.163$ 20 3,260$ <br />Testing ea.259$ 20 5,180$ <br />Subtotal, Vadose Zone Monitoring Event 8,440$ <br />Total Cost for Monitoring and Landfill Gas Control 2,112,880$ <br />Foothill Sanitary Landfill Prelim Closure-Postclosure Cost Estimate August_2025_Final.xlsx Page 11 of 15