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MM 4.5-6. a) To prevent and avoid any future impacts to the integrity of the well casing and soil column,the established 50-foot diameter existing soil column buffer around the plugged and abandoned oil well will be marked and maintained for future operations. Wastes will be disposed of up against this soil buffer, such that no voids would occur. The buffer will be periodically inspected to confirm that its integrity has not been compromised during operations. An initial inspection will be scheduled with DOGGR staff prior to April 15,2008. b) In the event that any structures will be built by the Project within the buffer zone with the potential to impact the two plugged and abandoned oil wells (API # 09261186 and API # 02935128)the Bakersfield Office of the Department of Conservation, Division of Oil, Gas, and Geothermal Resources(DOGGR) shall be contacted to inspect the wells and to recommend and approve any remediation required. Potential Significant Effect Without appropriate mitigation, the project may encounter presently unknown oil and gas or injection wells. Description of Specific Impact While the existing pits on the Project site have been already excavated, and the possibility is low of encountering such unknown wells during future operations, a portion of the Project site is within a designated oil field. Given this setting, during construction and continued operations there is a possibility that site development activities may encounter previously unknown oil and gas or injection well casings. Should site preparation activities uncover a previously unknown oil and gas or injection well casing, the proper abandonment of such feature in accord with Department of Oil, Gas and Geothermal Resources regulations and standards would reduce any impacts to less than significant. 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 4,5-7. If during grading, excavation or any other activity, any plugged and abandoned or unrecorded wells are uncovered or damaged, the Bakersfield Office of the Department of Conservation/Division of Oil, Gas, and Geothermal Resources shall be contacted to inspect the well and to approve any remediation required. Should remedial actions be required, the applicant will be responsible for implementing the Department- required corrective action. Findings of Fact—Section 15091 March 15,2016 H.M. Holloway Landfill Modification Project Final Board of Supervisors 32