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5.0 Environmental Analysis 5.1 Land Use <br />Avion Project SEIR <br />Page 5.1-13 <br />Toxics <br />Land uses, such as recreation and agriculture, that use chemicals or generate by-products such as <br />manure, that are potentially toxic or impactive to wildlife, sensitive species, habitat, or water quality need <br />to incorporate measures to reduce impacts caused by the application and/or drainage of such materials <br />into the MHPA. Such measures should include drainage/detention basins, swales, or holding areas with <br />non-invasive grasses or wetland-type native vegetation to filter out the toxic materials. Regular <br />maintenance should be provided. Where applicable, this requirement should be incorporated into leases <br />on publicly owned property as leases come up for renewal (City of San Diego 2013). <br />• The project would incorporate measures to reduce impacts caused by the application and/or <br />drainage of chemicals or project generated by-products such as pesticides, herbicides, <br />animal waste, and other substances that are potentially toxic or impactive to native <br />habitats/flora/fauna (including water) into the MHPA. All construction-related activity that <br />may have potential for leakage or intrusion shall be monitored by the Qualified <br />Biologist/Owner’s Representative or Resident Engineer to ensure there is no impact to the <br />MHPA. The project has been designed to limit post-development storm water runoff <br />discharge rates and velocities to maintain or reduce pre-development erosion and to reduce <br />nutrients, organic compounds, oxygen demanding substances, oil and grease, bacteria and <br />viruses, and pesticides by applying best management practices (BMPs). <br />Construction BMPs, such as monitoring, flagging, staking or silt/bio fencing around sensitive <br />areas would be used to ensure toxins from construction and project implementation would <br />not impact the MHPA. <br />Lighting <br />Lighting of all developed areas adjacent to the MHPA should be directed away from the MHPA. Where <br />necessary, development should provide adequate shielding with non-invasive plant materials (preferably <br />native), berming, and/or other methods to protect the MHPA and sensitive species from night lighting (City <br />of San Diego 2013). <br />• Lighting for the project would be shielded and/or directed away from the MHPA. Lighting for <br />the project would be responsive to the species in the area as well as the overall rural <br />surroundings. Understanding that some species rely on darkness for shelter, feeding <br />patterns, migrating, etc., the areas adjacent to any MHPA would be especially sensitive to <br />light exposure in order to retain native characteristics. Placement and use of lighting <br />associated with the project would be designed to be shielded and directed downward to <br />minimize light pollution of adjacent MHPA lands and accommodate the habits of nocturnal <br />species that prefer to move and forage in darkness. <br />Additionally, the MHPA is located at the bottom of a manufactured slope and there would be <br />a 20- to 30-foot elevation difference from the project. Any lighting for the project at the top <br />of the slope would be shielded and directed away from the MHPA such that no direct <br />illumination would occur towards the MHPA.