PD Background Report COH-Parks & Rec (PL-SMA-2023-031 & PL-SSV-2023-003)

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SUMMARY OF MITIGATION MEASURES AND PROJECT COMMITMENTS TO MINIMIZE POTENTIAL IMPACTS OF THE PROJECT The following measures have been incorporated into the project description: Site -Specific Best Management Practices Due to the proximity of nearshore ocean waters, the project could present increased potential for water quality impacts during construction. The proposed project would include site -specific Best Management Practices (BMP) to be implemented during project construction to minimize erosion and potential impacts to water quality. The BMPs would include but would not be limited to the USFWS recommended standard BMPs regarding sedimentation and erosion in aquatic environments: I. Turbidity and siltation from project -related work should be minimized and contained within the project area by silt containment devices and curtailing work during flooding or adverse tidal and weather conditions. BMPs should be maintained for the life of the construction period until turbidity and siltation within the project area is stabilized. All project construction -related debris and sediment containment devices should be removed and disposed of at an approved site. 2. All project construction -related materials and equipment (dredges, vessels, backhoes, silt curtains, etc.) to be placed in an aquatic environment should be inspected for pollutants including, but not limited to; marine fouling organisms, grease, oil, etc., and cleaned to remove pollutants prior to use. Project related activities should not result in any debris disposal, non-native species introductions, or attraction of non- native pests to the affected or adjacent aquatic or terrestrial habitats. Implementing both a litter -control plan and a Hazard Analysis and Critical Control Point plan (HACCP - see http://www.haccp- nnn.org/Wizard/default.asp) can help to prevent attraction and introduction of non-native species. 3. Project construction -related materials (fill, revetment rock, pipe, etc.) should not be stockpiled in, or in close proximity to aquatic habitats and should be protected from erosion (e.g., with filter fabric, etc.), to prevent materials from being carried into waters by wind, rain, or high surf. 4. Fueling of project -related vehicles and equipment should take place away from the aquatic environment and a contingency plan to control petroleum products accidentally spilled during the project should be developed. The plan should be retained on site with the person responsible for compliance with the plan. Absorbent pads and containment booms should be stored on -site to facilitate the clean-up of accidental petroleum releases. 5. All deliberately exposed soil or under -layer materials used in the project near water should be protected from erosion and stabilized as soon as possible with geotextile, filter fabric or native or non-invasive vegetation matting, hydro -seeding, etc. These BMPs will be refined in accordance with County of Hawaii regulatory requirements as part of the permitting process.