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Potential Significant Effect Without appropriate mitigation, disposal of the waste streams could create conditions favorable for landfill wildfires. Description of Specific Impact No burning of waste will be allowed at the disposal site. Organic wastes such as biosolids, unless properly managed, might allow for an increased landfill fire hazard. Finding Changes or alterations have been required in, or incorporated into the project that substantially lessen the potentially significant effect as identified in the Final EIR, so that environmental effects after such mitigation are reduced to a less than significant level. Brief Explanation of the Rationale for the Finding Pursuant to Public Resources Code Section 21081(a)(1), the Board of Supervisors finds that the project's adherence to the following mitigation measure will reduce the potential impact of this significant effect to a less than significant level: MM 4.5-8. Dewatered Class A and B biosolids shall be disposed in the Pit"G"and Pit"F/G Connection Area"only. Potential Significant Effect Without appropriate mitigation, the project can result in adverse impacts to the public health and safety and the environment related to the generation of gas from decomposition of wastes. Description of Specific Impact The potential for methane gas generation during site operations is low due to the plan of operations which will provide for the segregation of wastes, (biosolids), into separate disposal areas with incorporation of equal volumes of onsite native clay-rich soils, and co-disposal of fly ash with the biosolids. As a Class III Industrial Waste facility, the LEA may grant the disposal site an exemption to all or any portion of the requirements of Article 6, Subchapter 4, Chapter 3, Title 27 CCR. The exemption would be based on the ability of the operator to demonstrate to the satisfaction of the LEA that there is no potential for adverse impacts on public health and safety and the environment. The LEA finding takes into consideration factors including but not limited to: the amount, nature and age of refuse; projected gas generation; and remoteness of the facility. If the LEA has cause to believe that a hazard or nuisance may be created by landfill decomposition gases, the applicant shall monitor the Project site for the presence and movement of gases, and take the necessary action to control such gases. If monitoring indicates methane gas movement away from the site, the owner shall, within a period of time specified by the LEA, construct a gas control system approved by that agency. The agency may waive this requirement if satisfactory evidence is presented indicating that adjacent properties are safe from hazard or nuisance caused by methane gas movement. Findings of Fact—Section 15091 Match 15,2016 H.M. Holloway Landfill Modification Project Final Board of Supervisors 33