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be conducted to identify existing features that would need to be preserved during construction, such as electrical utility poles, and to identify the initial limits of the excavation areas. Existing features requiring demolition prior to cover construction (e.g., structures associated with former model airplane landing strip and skeet/trap shooting range)would be removed using standard earthmoving equipment(e.g., excavators, front end loaders, and dump trucks). Trees and surface vegetation would be removed, as needed,prior to mass grading. 5.4 Excavation and Consolidation Methods Mass grading will be conducted to accommodate the Project Sierra development area, including creation of new drainage channels and stormwater detention ponds). Soil from the mass grading will be consolidated within the new Warehouse and Outdoor Storage Area(Figure 15). Limited grading will be conducted outside of the Project Sierra development area, so that the new covers in these areas will tie into the existing pavement and structures. Soil from the limited grading will be consolidated within the same general vicinity. Soil will be excavated, transported, and consolidated on site using standard earthmoving equipment (e.g., excavators,bulldozers, front end loaders, dump trucks, and compactors). Manual excavation methods will be used, where needed, to protect existing features (e.g., electrical utility poles). Consolidated soil will be compacted to provide a stable foundation for the overlying covers described in Section 4.5. 5.5 Cover Construction Methods Following consolidation of the excavated soil from grading, covers will be constructed as described in Section 4.5. Clean soil will be transported and placed using standard earthmoving equipment (e.g., excavators,bulldozers, front end loaders, dump trucks, and compactors). Finished surfaces (e.g., reinforced concrete and asphalt-concrete)will be manufactured and installed in accordance with industry standards (e.g., ASTM International). The cover designs will be detailed in an RDIPs. The RDIPs will provide specifications detailing technical requirements for the cover construction. The RDIPs will also identify the planned vegetation in limited landscape areas, and describe how the soil cover's integrity will be maintained in these areas. Additionally, the RDIPs will include a CQA Plan detailing the planned oversight to ensure that the cover is constructed in accordance with the drawings and specifications. 5.6 Dust Control Measures During earthmoving activities, depending on soil conditions, there is the potential to generate airborne dust. Dust control measures will comply with the SJVAPCD requirements to protect on- site and off-site receptors from fugitive dust. Dust suppression will be performed by lightly spraying or misting the work zones (such as the excavations, soil handling areas, and haul roads) with water. Dust suppression water may incorporate a surfactant(e.g., BioSolve®) if water is not sufficient to reduce fugitive dust emissions. Site 47 RAP for Soil 20 October 2023