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Mosquitoes Adult female mosquitoes can deposit eggs in a variety of aquatic habitats and other sources that contain water. The immature stages of each mosquito species develop in particular habitats. In general,there are four mosquito habitat groups: agricultural, industrial, domestic, and natural sources. Typical sites within these habitat groups include: ■ Agricultural Sources: irrigated pastures, dairies,and orchards. ■ Industry Sources: sewage treatment ponds,flood plains,drain ditches. ■ Domestic Sources: containers, debris in and around ponds, bird baths, pet watering dishes, animal troughs, septic tanks, catch basins, roadside ditches, leaky sprinkler systems, stagnant swimming pools. ■ Natural Sources: wetlands,rain pools. The Kern County Vector and Mosquito Abatement District notes that improperly designed or operated solids separation and liquids storage facilities may be potential sources of mosquito species that are public health pests or potential vectors of encephalitis virus. Vector-Related Project Design and Operations Project design and operations incorporate: ■ A truck and equipment rinsate system to clean biosolids transport and disposal vehicles prior to public road entry or to reuse (see Section 3.1 for system design characteristics, including system base, curbing and operation). ■ The potential for mosquito breeding and propagation is rendered less than significant by the cover requirements and by the absence of standing water inherent in the Project design. The leachate collection and recovery system design (see Figures 3-11 and 3-12) does not provide shallow or stagnant water mosquito breeding potential). Neither will the containment system for the rinsate water. ■ A piped and enclosed leachate recovery system serving the biosolids disposal area. ■ Cover and/or encapsulation of biosolids,with soil and fly ash,within 24 hours. ■ Although planned project operations do not encourage fly breeding, it is possible that biosolids disposal pit "edge" areas, truck spillage, or truck washdown detritus might provide fly breeding opportunities. Areas with water have been shown to provide an opportune habitat to harbor fly propagation. Such opportunities must be viewed as potentially significant despite the Project's four- mile isolation from residential receptors. ■ The potential for rodent impacts is rendered less than significant because of the required frequency of cover of the waste streams. There is no opportunity for incidental food sources or burrow areas to be available. 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 Findine Pursuant to Public Resources Code Section 21081(a)(1),the Board of Supervisors finds that the project's Findings of Fact—Section 15091 March 15,2016 H.M.Holloway Landfill Modification Project Final Board of Supervisors 36