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1 Draft Supplemental Environmental Impact Report Page IV.A-22 Forward Inc.Landfill 2018 Expansion Project Stockton Airport, and no mitigation is required. Impact A.2 (Revises 2013 EIR Impact A.2): The proposed project could convert agricultural land to industrial use. The 8.6-acre expansion area in the southeast consists of the existing channel of the South Fork of South Littlejohns Creek and existing permitted landfill operations (including the composting facility);therefore, it is not considered agricultural land. The 8.7-acre expansion area in the northeast of the site is small in terms of agricultural land,isolated from other agricultural land, and, as discussed in Setting,Agricultural Land, above,is classified as Urban on the Prime Agricultural Land and Important Farmland Map. For these reasons, 8.7- acre expansion area in the northeast is not considered to be viable agricultural land. Because both expansion areas would be within the currently permitted Forward Landfill,the proposed project would not constitute "leap-frog" expansion of isolated, non-contiguous industrial uses into an area of agricultural preserve. Therefore, the 2018 Expansion Project would not conflict with the County's goals of preserving agricultural land, or contribute to the cumulative loss of agricultural land in San Joaquin County and the Central Valley. The project would have no impact to agricultural lands and no mitigation is required. Impact A.3: The proposed project could exceed FAA height limits for structures near airports. (Revises 2013 EIR Impact A.3) As discussed above,the nearest runway of the Stockton Metropolitan Airport is approximately one mile west of the existing Forward Landfill boundary, and nearly two miles from the proposed infill areas. For purposes of aircraft safety, Federal Aviation Administration(FAA)regulations(Federal Aviation Regulation (FAR) Part 77) establish height limits for structures near airports. The regulations include airport imaginary ' surfaces,which are three-dimensional boundaries that extend outward and upward from airport runways. An analysis of the proposed expansion's conformity with FAR height limitations was conducted by an independent consultant retained by the applicant, and ' summarized below. (Williams Aviation Consultants,2018). FAR Part 77 Obstruction Criteria identify Mean Sea Level(AMSC)heights for Stockton Metropolitan Airport(SCK), consisting of a horizontal imaginary surface that 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. Beyond the horizontal imaginary surface,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 within the horizontal area for the Stockton Metropolitan Airport. Outside the 10,000-foot limit of the horizontal surface, obstructions into the conical imaginary surface would exceed the conical imaginary surface limits. Both portions of the 2018 Expansion Project would not penetrate into either the horizontal or the conical imaginary surfaces. An analysis of the Terminal Instrument Procedures (TERPS) criteria was completed to determine the maximum elevation to which a structure could be erected without impacting SCK instrument approach and departure procedures. Penetration of the Obstacle Clearance Surfaces(OCS)by a proposed structure would result in the need to increase the procedure's Minimum Descent Altitude(MDA) (the lowest altitude that a pilot can descend on an approach) and would likely receive a Hazard Determination from the FAA.The elevation of the