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continue on a quarterly basis throughout the postclosure period. <br /> Monitoring frequency and parameters being tested may be increased <br /> as necessary or as directed by the Local Enforcement Agency or the <br /> CIWMB. The labor camp structures are monitored monthly from May - <br /> October and quarterly from November April. <br /> Monitoring results have been presented in the form of a report to <br /> the Local Enforcement Agency and the CIWMB within 90 days of the <br /> sampling event. Monitoring reports through March, 1994 are <br /> included as appendix B. Monitoring and Reporting will continue on <br /> a quarterly basis for gas wells. Labor camp structure monitoring <br /> results will be submitted to the LEA and CIWMB within 15 days of <br /> monitoring. <br /> Monitoring results at the perimeter monitoring wells indicate that <br /> methane levels exceed the regulatory limits. As a result, the <br /> County is in the process of designing a landfill gas control system <br /> to bring perimeter methane levels into compliance. <br /> VII EQUIPMENT - QA/QC <br /> Monitoring is accomplished using a Gas Tech Landfill Monitor which <br /> is capable of measuring methane concentrations in parts per million <br /> or percent. Wells will be monitored for methane only unless <br /> otherwise specified by the LEA, the RWQCB, and/or the CIWMB. The <br /> ppm scale is used for structure monitoring. The instrument is <br /> ' calibrated with a 2 .5% methane mixture for the ppm scale, 50% <br /> 11 <br />