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4/17/20 (P:\TER2001\BA\Special‐Status Species Biological Resources Habitat Assessment 4‐17‐20 .docx) 6 Species Status (Federal/State) Habitat Potential for Occurrencea San Francisco (saltmarsh) common yellowthroat Geothlypis trichas sinuosa –/SSC Resident of the San Francisco Bay region, in fresh and salt water marshes; requires thick, continuous cover down to water surface for foraging; tall grasses, tule patches, willows for nesting. No suitable habitat present. May forage at the project site, but not likely to nest due to lack of suitable nesting habitat. Only small patches of low quality habitat present. Closest CNDDB occurrence is a 1995 record at Arrowhead Marsh, approximately 1.9 miles from the project site. Species observed at the Metropolitan Golf Links and Oyster Bay Regional Shoreline (eBird 2020). Mammals Townsend’s western big‐ eared bat Corynorhinus townsendii townsendii –/SSC Found in wooded areas with caves or old buildings for roost sites. Suitable roosting or hibernating habitat may be present within structures on or adjacent to the site. No tree hollows or bat roosts observed in the trees during LSA’s reconnaissance‐level survey. No bats or bat sign observed in concrete outfall structure at the basin. Pallid bat Antrozous pallidus –/SSC Occupies a wide variety of habitats at low elevations. Most commonly found in open, dry habitats with rocky areas for roosting. Suitable roosting or hibernating habitat may be present within structures on or adjacent to the site. No tree hollows or bat roosts observed in the trees during LSA’s reconnaissance‐level survey. No bats or bat sign observed in concrete outfall structure at the basin. Big free‐tailed bat Nyctinomops macrotis –/SSC Roosts in buildings, caves, crevices in high cliffs or rock outcrops, and occasionally in holes in trees. Suitable roosting or hibernating habitat may be present within structures on or adjacent to the site. Western red bat Lasiurus blossevillii –/SSC Roosts primarily in trees, 2‐40 feet above ground, from sea level up through mixed conifer forests; prefers habitat edges and mosaics with trees that are protected from above and open below with open areas for foraging. No suitable habitat present. Alameda Island mole Scapanus latimanus partum –/SSC Only known from Alameda Island; found in a variety of habitats, especially annual and perennial grasslands; prefers moist, friable soils; avoids flooded soils. No suitable habitat present. Only known to occur on Alameda Island. Salt marsh harvest mouse Reithrodontomys raviventris FE/SE, SFP Tidal salt marshes of San Francisco Bay and its tributaries; requires tall, dense pickleweed for cover. Limited band of pickleweed along slough does not provide high quality habitat. No pickleweed present at location of existing outfall. Basin does not support suitable habitat. Closest CNDDB occurrence is a 1938 record at Arrowhead Marsh, approximately 1.9 miles from the project site. Salt marsh wandering shrew Sorex vagrans haliocoetes –/SSC Middle upper salt marsh with dense vegetation cover such as pickleweed; favors areas with abundant drift wood or other surface cover. Could occur along the tidal slough, although suitable habitat is limited. Closest CNDDB occurrence is a 1950 record from the Oakland Airport, approximately 0.1 mile from the project site and a 1938 record from Arrowhead Marsh, approximately 1.9 miles from the site.