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D. Cumulative Environmental Effects Of The Proposed Project That Will Have A Less Than Significant Impact On The Environment. Cumulative impacts on hazards and hazardous materials will be reduced to a less than significant level with the incorporation of the proposed mitigation measures. E. Cumulative Environmental Effects Of The Proposed Project That Will Have A Significant Impact On The Environment. Potential Significant Effect The project could contribute to cumulative vector impacts. Description of Specific Impact A biosolids composting operation (San Joaquin Composting) is located approximately 4.5 miles north of the Project site. This operation is, as any operation involving the processing of large quantities of organic material,potentially,although not necessarily, a source of fly breeding. South of the Project site is the currently inactive Kem County solid waste disposal site. If activated, the disposal site could be a potential source of fly breeding. However, Kern County Waste Management is not planning to activate this landfill until 2027. Life expectancy of this Project is shorter than 2027 so no cumulative impact with the reactivated landfill is expected. Grazing activities are also known to occur in the Project vicinity which provide opportunities for fly breeding seasonally from animal feces. As noted in evaluating Project-level vector impacts, the nearest residential development is approximately 4 miles distant from the Project, 8.5 miles distant from the composting operation and 4 miles distant from the inactive landfill. The nearest schools; Lost Hills Elementary, Lost Hills Middle, and Thomas Middle, are located approximately 4 miles distant from the proposed Project. There is no model or scientifically predictable method for determination of fly dispersal or fly population at specified distances from a breeding source. Therefore, only a qualitative cumulative analysis can be conducted. Based on studies, some flies have been shown to travel farther than one to two miles from their release point but, in general, fly control efforts for a community problem are focused within one mile of the source, and assume random dispersal. Based on this lack of modeling and predictability and the lack of quantitative impact assessment guidance for vectors, this cumulative impact assessment is conservatively made. Unlike noise or other impacts there is no scientifically supported established threshold for the number of flies that represent an impact on a sensitive receptor, such as a residential backyard. While projects subject to the conditional use permit process may have IPM Plans to ensure that generation of flies is not excessive, existing sources in an area are not subject to the same requirements. While the Project will mitigate the generation of flies to a level of less than significant, the cumulative impacts from flies on nearby sensitive receptors can not be determined to be less than significant, despite the lack of complaint records regarding existing fly impact. Findine The cumulative vector impact is considered significant and unavoidable. All feasible and reasonable 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. Findings of Fact—Section 15091 March 15,2016 H.M.Holloway Landfill Modification Project Final Board of Supervisors 39