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r Hemn rookery The presence great blue heron rookery within the project al would likely restrict construction and al activity during the nesting seasdfi. These minimization and avoidance measures are based upon other projects with mpacts to great blue heron rookeries. Based upon recent conversations with CDFG,there are no standard minimization and measures for potential impacts to great blue heron rookeries. The project proponent will consult with CDFG to determine the appropriate minimization and avoidance measures for this project. Raptor species. The potential presence of raptor nests within the project area may require the project proponent to conduct preconstmction raptor nest surveys prior to the start of active construction within the general nesting season (March through mid August). The presence of active raptor nests often prohibits construction activities near an active raptor nest until the young birds have fledged- Construction buffers for nesting raptors vary depending upon the location of the nest and the nature of the project. The project proponent will consult with the California Department of Fish and Game to determine the appropriate minimization and avoidance measures for this project. Valley Elderberry Longhorn Beette(VELE). Initial surveys detected several elderberry shrubs scattered within the upland habitats of the project. Due to the season of the survey(winter), elderberry shrubs were not readily identifiable. More elderberry shrubs may be present within the project area. Avoidance of impacts to elderberry shrubs often requires construction buffers around each shrub. Unavoidable impacts to elderberries may require shrub transplant and compensatory plantings of elderberries and associated plant species. These mitigation measures are based upon the VELB Conservation Guidelines(U.S. Fish and Wildlife Service 1999). Construction buffers for the protection of elderberry shrubs vary depending upon the nature and scope of the project. The project proponent will consult with the U.S. Fish and Wildlife Service(USFWS)to determine the appropriate minimization,avoidance and mpensatory mitigation measures for this project. Water will be hauled to the site for Phase I, if needed. A domestic well will be installed in Phase II or III. Sewage Disposal In Phase I, as well as in later phases,composting toilets will be used throughout the site.Waste from the toilets will be removed from the site and disposed of in a legal manner annually, or as needed. As a substitute, container pit toilets will be used with waste material containers removed and disposed of in a legal manner as needed.All waste from toilet facilities will be contained and will be disposed of off-site. A leech field will be constructed in Phase II to deal with the minimal gray-water to be produced on site. No black-water will be duced Storm Drainage Impervious surfaces will be kept to a minimum. Runoff from larger roofs(conference/interpretive center)may be collected for on site use or will be directed into bioswales in landscaped areas. All paving will drain onto adjacent landscaping in a way to minimize erosion, pollution, and possible health hazards. Construction Construction dates will be limited to minimize or avoid impact to rookeries or California black rail and raptor nests. Construction dates and construction requiring grading would be restricted to dates established by the CDFG. Because there are no standard minimization ■ and avoidance measures for potential impacts to rookeries or California black rail and raptor nests, the project proponent will consult with the CDFG to determine the appropriate minimization and avoidance measures for this project. Contract work will be done on weekdays- Volunteer work may be scheduled for weekends. There will be from 3-15 people working daily during Phase I and 3-25 people working daily during Phase II and III. Access to the Island is limited to boats. Phase I will require barge based construction and dredging for the drop-off dock.A small tractor will be used for clearing trails, barge based crane and a tractorlbackhoe will be used for installation of pre-fabricated toilets. Phase II and III will require barges, dredging for increased dock size,tractors/backhoes,and generators to power various power tools. Materials to be used will include wood, concrete, decomposed granite, recycled lumber, metal, and other standard structure materials. Additional materials used for construction tools include diesel, gasoline, paint and/or stain, and pavement stabilizer(i_e. polypavement). All will be stored and handled appropriately to prevent spills or contamination on site. Any waste or surplus will be taken off site when construction is completed and stored or disposed of in a legal manner. Phase I A new forty foot dock and gangway for drop-off will lead visitors to a cleared trail looping along the upland and riparian area and leading to the lower beach flats. Two 10 site tent platform camping areas will be developed for a total of 20 camp sites and a restroom at each group area. One special use camping area with 6 tent platform camp sites and a restroom will be developed on the lowland beach flats to be used by school groups and other public and private groups. Phase 11 A Main Dock will be built for day use and some overnight camping,which will give direct access to the island's upland area and conferencelvisitors center.A trait system will lead visitors along an interpretive nature walk,to various camping sites, day use areas, and interpretive displays. Adjacent to the main visitors/conference center is an open sided structure that can be used as a classroom, meeting hall, or space for F'.\DEVSVOPlanning Application Fonn5lUse Pev d (Revised 6-03-04) Page 4 of 9