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emissions. When biogas production becomes significant,then a vapor collection and disposal system will be installed. Odor from landfill gas is eliminated with the use of the flare. Due to the remote location of the facility emissions of odorous substance are not expected to result in a public nuisance because the predicted odor concentration increase will be less than 5 D/T. The Project is not expected to result in significant odor impact (<5 D/T) at sensitive receptors or at existing or likely future receptors located within the 6-mile radius planning area. 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 measures will reduce the potential impact of this significant effect to a less than significant level: MM 4.1-3. Dewatered Class A and B biosolids shall be placed in disposal pits along with an existing waste stream,such as fly ash, for codisposal. The biosolids will be disposed of, covered and compacted with a minimum 6 inches of soil material at the end of each working day in accordance with SJVAPCD Rule 4565. In the event of inclement weather conditions, biosolids will also be covered by the end of the day with a thin soil cover in accordance with SJVAPCD Rule 4565 until the material can be discharged to the biosolids disposal area. MM 4.1-4. Monitoring of landfill gas emissions shall be in accordance with applicable regulatory requirements so as to determine when significant amounts of landfill gas are generated such that a landfill gas collection system is mandated. When biogas production becomes significant, as determined by the San Joaquin Valley Air Pollution Control District, (surface concentration greater than 500 ppmv) then a vapor collection and control system will be used to reduce biogas emissions. Biogas control systems typically consist of gas extraction wells and gas collection piping for transporting extracted gas to a facility for use as fuel or to a flare for incineration. The Project will design and install a landfill gas collection system approved by the appropriate regulatory agencies(Local Enforcement Agency, California Integrated Waste Management Board, San Joaquin Valley Air Pollution Control District). MM 4.1-5. (a) The Project will install an onsite flare in accordance with all applicable regulatory requirements to combust the 75%of landfill gas emissions captured by the landfill gas collection system. The onsite flare will have a destruction efficiency of 99%. (b)After project commencement,the project proponent shall become a"Forest Founder"of the Tree Foundation of Kern and/or the Kern River Parkway Foundation or use some other appropriate planting organization. Use of an appropriate planting organization will ensure the long term maintenance to maturity of the trees.The applicant shall purchase 671 trees at$ 50 per tree to be planted over the next three years at a minimum of 224 trees per year until completion. The applicant shall provide appropriate ---- ------- --- .-..._.__._....................... .............. -.-...._._.......--------- -...._..__... . . _.. — .. - - -.._ Findings of Fact—Section 15091 March 15,2016 H.M. Holloway Landfill Modification Project Final Board of Supervisors 6