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The area is free of underground construction besides the landfill <br /> itself; therefore, this was not a major consideration for <br /> determining well location. <br /> Data regarding the age and moisture of waste was not available, so <br /> age and moisture of waste were not used as major design criteria. <br /> Each Monitoring well is 611 in diameter and contains three <br /> monitoring probes (figure 3) . One monitoring probe was placed at <br /> the maximum depth of the well bore, one at approximately one half <br /> the depth of the well bore, and one at approximately 5 feet below <br /> the ground surface. <br /> V. LABOR CAMP STRUCTURE MONITORING <br /> Labor camp structures closest to the landfill perimeter are <br /> monitored for methane. Each building contains two apartments. <br /> Monitoring consists of a complete walk-through of each apartment <br /> with an emphasis on incoming plumbing, electrical outlets, <br /> baseboards, behind stoves, and cracks (if encountered) . In <br /> addition, vents on the roofs of two buildings are monitored. <br /> VI. MONITORING AND REPORTING <br /> Monitoring is performed in accordance with the CIWMB f s regulations <br /> for closure and postclosure. Gas wells were monitored monthly for <br /> the first six months according to the recommendation of the LEA. <br /> The frequency was reduced to quarterly after six months and will <br /> 10 <br />