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Sequoia Ecological Consulting,Inc. Page Final Scope of Work for Environmental Regulatory Compliance& 8 of 14 Habitat Mitigation Services for Stream Maintenance Project October 2022 TASK 4. HABITAT MITIGATION: INVASIVE SPECIES MANAGEMENT, PLANTING AND MAINTENANCE Hanford, in partnership with Sequoia,will perform implementation of the HMMP within 6.81 acres of designated Mitigation Area along the Arroyo de la Laguna as described in the subtasks below. 4.1 Invasive Species Management Area In spring 2023, Hanford will mobilize crews to perform weed management within the Invasive Species Management Area (1.68) and also across the entirety of the site.The objective is to reduce non-native plant populations ahead of restoration planting efforts in fall 2023. Prior to starting activities on-site, Hanford will hold a pre-work meeting in the field with both Sequoia and the City to review project limits, resource avoidance measures, and approach. Access to the site will be from Laguna Creek Lane gate (via two-track road/trail). Hanford will establish a small staging area for materials and vehicle parking adjacent to the site. Crews will use Marilyn Murphy Kane Trail to access some of the work area—appropriate pedestrian flagging/signage will be used to alert trail-users to vehicle traffic and construction activities. Clearing vegetation for off-trail access paths may be necessary. A combination of hand tools, mechanical control (mowing) and herbicide application will be used to target invasive species listed in the HMMP. All reproductive plant material (e.g., flowers, buds, seed pods) will be bagged and removed from the site or loaded into a debris box in the staging area.All clearing and weed management efforts will occur prior to seed set, in spring 2023, in the beginning of the growing season. Weed management will consist of 2-3 initial visits, and several re-treatment events to control re- growth. Herbicide application will be conducted with approval from the City after review of approach, safety considerations and herbicide materials. Broad-spectrum post-emergent herbicide with minimal soil persistence will be used. Early germinating non-native thistles, Harding grass and poison hemlock will be controlled with herbicide, especially in early spring during active growth, prior to flowering. The purpose of including the remaining 5.13 acres in weed management efforts in spring 2023 is to adequately clear/control invasive plants in areas that are to be later planted with natives (Subtask 4.2).This will bolster native plant success in the riparian enhancement area by reducing perennial weeds and reducing re-growth via their dropped seeds. 4.2 Riparian Enhancement Planting Area Hanford will work with Sequoia to finalize a planting palette, plan, and approach to layout, using the HMMP as a guide. Once final quantities and species are determined, Hanford will initiate a grow contract with a local native plant specialist nursery. Contract-grows for riparian plants of the type and size proposed in the HMMP typically take at least one year to complete-a contract grow will be setup as soon as possible after contract award, for planting in winter 2023-2024.