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Draft Supplemental Environmental Impact Report Page IV.A-22 Forward Inc.Landfill 2014 Expansion Project expansion would comply with the ROC also applies to the south portion of the 2014 Expansion Project. The northeast portion of the 2014 Expansion Project site is located outside of the localizer taw approach area,but is within the conical imaginary surface defined in FAR 77.19. Under FAR 77.19, the horizontal imaginary surface extends 10,000 feet from a point 200 feet beyond the end of the nearest runway, and is 150 feet above the published airport elevation (33 feet at Stockton), or 183 feet msl. The conical imaginary surface extends upward from the horizontal surface at 20:1 for an additional 4,000 feet. Thus,obstructions greater than a height of 183 feet msl would exceed the horizontal imaginary surface limits for the Stockton Metropolitan Airport. Outside the 10,000-foot limit of the horizontal surface, obstructions into the conical imaginary surface that slopes upward from an elevation of 183 feet msl would exceed the conical imaginary surface limits. This portion of the 2014 Expansion Project has a maximum height of 200 feet,but has a slope that does not penetrate into the conical imaginary surface. In summary, the proposed final grades of the 2014 Expansion Project would not exceed the obstacle clearance height of the localizer runway 29R instrument approach, and would not encroach into the Stockton Municipal Airport imaginary surfaces. (Dershowitz,2011). Therefore, the final grades of the proposed expansion project would have a less-than- significant impact on safety due to conflict with FAR height limits or the airport imaginary space. However,when the two expansion areas have been filled to an elevation near their permitted heights, equipment operating on top of the landfill could temporarily intrude into the conical �., space. Forward would continue its procedure of submitting a Notice of Proposed Construction or Alteration(FAA Form 7460-1) at least 45 days prior to operation of any equipment that could temporarily intrude into the imaginary surface, as required by the Federal Aviation L. Administration (FAA)for all proposed construction or alterations that could intrude into the airport imaginary surface. This would reduce the impact of operating equipment on the conical space to a less-than-significant level. �- The impact of the 2014 Expansion Project on FAA height limits would be less than significant and no mitigation is required. Impact AA: The proposed project could increase bird hazards at the Stockton Metropolitan Airport(Revises 2013 EIR Impact A.Q. As discussed in Bird Strikes,in the Setting section above, the existing landfill has not generated significant bird strike hazards for the Stockton ` Metropolitan Airport in the past from gulls or other bird species, and a bird control program has been successful in controlling birds at the landfill. The currently proposed Project would continue to employ current bird control measures including properly compacting and covering wastes at the end of each day, and use of falcons,bird flares, whistles, and bombs. The +� maximum elevation of the expansion area would be approximately 200 feet above mean sea level(MSL), lower than the permitted maximum height of 210 feet MSL for the existing Forward Landfill. As discussed above, the proposed expansion would not conflict with FAR height limits. However,both portions of the 2014 Expansion Project would have higher surfaces that could increase the hovering altitude of any birds attracted to the landfill, and thus could create a hazard to aircraft. The following procedures are proposed as part of the project: • Existing measures to discourage birds from the landfill will be continued. Surface area i of ponds will be limited to the extent feasible.