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Non-Water Release Corrective Action Plan <br /> North County Recycling Center and Sanitary Landfill <br /> present. Generally a subsurface fire can be confirmed by: <br /> • The presence of carbon monoxide (CO) in the gas collected by the landfill gas collection <br /> system; <br /> • Substantial settlement over a short period of time; <br /> • Smoke or smoldering odor emanating from the gas extraction system or landfill; <br /> Levels of carbon monoxide (CO)that exceed 1,000 parts per million (ppm); <br /> • Combustion residue in landfill gas extraction wells and/or headers; <br /> Increase in gas temperature in the extraction system (above 140' Fahrenheit); or <br /> • Temperatures in excess of 170' Fahrenheit. <br /> Note that the County measures the concentration of CO at each well using portable detection <br /> equipment on a monthly basis. <br /> CalRecycle consider levels of CO in excess of 1,000 ppm to be a positive indication of an active <br /> underground landfill fire. Levels of CO between 100 and 1,000 ppm are viewed as suspicious <br /> and require further air and temperature monitoring. Levels between 10 and 100 ppm may be <br /> an indication of a fire but active combustion is not present. To date, CO has not been detected <br /> at the NCRCSL over 100 ppm at any well. <br /> Due to the landfill gas extraction systems at the NCRCSL, subsurface fires are considered a <br /> reasonably foreseeable casual event and therefore mitigation measures were evaluated as part <br /> of this NWRCAP. <br /> 4.3.2 Wildfires <br /> Wildfires have been documented to destroy or damage landfill monitoring systems, vegetation, <br /> and irrigation systems. The potential damage to a landfill caused by wildfires can vary <br /> significantly depending on the facility location, surrounding terrain, local weather conditions, <br /> and protective measures (such as fire breaks). <br /> CalRecycle's BMP guidelines recognize the Department of Forestry and Fire Protection (Cal Fire) <br /> and local fire agencies for potential fire hazards. Landfills located within or adjacent to <br /> moderate/medium or high/very high fire hazard zones, should be evaluated for potential <br /> damage due to wildfire. Review of Cal Fire's Fire Hazard Severity Zone map for San Joaquin <br /> County shows that the NCRCSL falls under the responsibility of the local fire jurisdiction (see <br /> ® Figure 5) and is within an un-zoned area of fire hazard severity. <br /> 2013.A135 I N:\San Joaquin\North County\Non-Water Release CAP\Final Report\North County_NWCAP_Report_Final.docx <br /> July 2014,Rev.0 12 <br />