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II. Project Description <br /> would be used for sampling the leak detection standpipe. Sampling stations would be monitored <br /> monthly. The inspector would measure the quantity of any liquid present. The rate of leakage,if <br /> any,would be calculated in gallons per acre per day(gpad)by calculating the changes in liquid <br /> volume between monitoring events. The purpose of this leak detection monitoring also serves <br /> the purpose of monitoring the vadose zone to the degree that it can monitor for leakage through <br /> the liner. <br /> Landfill Gas Monitoring. Discussions withersonnel from the California Integrated Waste <br /> P g <br /> Management Board,the Local Enforcement Agency, and the City of Stockton have indicated that <br /> there have not been gas migration problems associated with the landfill. Combustible Gas <br /> Indicator readings taken by personnel from the California Integrated Waste Management Board <br /> have shown that there have been no compliance problems at the property boundaries for at least <br /> two years. Thus,there has been no action taken by regulatory agencies to require monitoring of <br /> landfill gas. <br /> As the proposed landfill expansion would include an impermeable liner,which would act as a <br /> containment structure,gas control would be necessary. Additionally,increased regulatory <br /> requirements are anticipated within the next few years. Therefore, nine new gas monitoring <br /> probes are proposed for installation around the expanded landfill. The exact location of these <br /> wells would be done under the guidance of a hydrogeologist. The actual monitoring procedures, <br /> which would address the frequency and the constituents that need to be monitored,would be best <br /> defined when the proposed regulations are confirmed and adopted. <br /> Hazardous Waste Monitoring. The Austin Road Landfill would continue to control the illegal <br /> disposal of hazardous wastes through signage and loadchecking. In addition,the operator would <br /> monitor quantity(cubic yards),type, and source of all wastes discharged to the landfill and <br /> record results on a monthly basis. <br /> Aerations Monitoring Program. The following items would be monitored by the operator of <br /> this facility. Records including,but not limited to these items would be kept and made available <br /> to the enforcement agency upon request: <br /> • quantity and types of wastes received at the site per da and per week; <br /> YP P Y <br /> • quantity and types of wastes salvaged per month,if any; <br /> • area of site utilized; <br /> II.33 <br />