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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 99 <br />includes the southern Sacramento Valley, northern San Joaquin Valley, eastern <br />San Francisco Bay Area, and Inner South Coast Ranges (CNPS 2019; Jepson <br />Flora Project 2019). It is presumed extirpated from Contra Costa, Monterey, San <br />Benito, Santa Clara, San Francisco, San Joaquin, Sonoma, and Stanislaus <br />counties. It typically grows in alkali playas, valley and foothill grasslands, and <br />vernal pools, often on adobe soils (CNPS 2019). The microhabitat for Ferris’s <br />milk-vetch includes low ground, alkali flats, and flooded lands (CDFW 2019). <br />Alkali milk-vetch is threatened by development, competition from non-native <br />plants, and habitat destruction, especially agricultural conversion (CNPS 2019). <br />This species has moderate potential to occur within the Study Area based on the <br />presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-12, MM BIO-18, <br />and MM BIO-19 would reduce potential impacts to Alkali milk-vetch to: Less than <br />Significant with Mitigation Incorporated. <br />Heartscale (Atriplex cordulata var. cordulata) <br />Heartscale has a CRPR of 1B.2, but it is not listed under FESA or CESA. This <br />species is an annual herb in the goosefoot family that blooms from April through <br />October (CNPS 2019). It is endemic to California, and its current range includes <br />the Central Valley (CNPS 2019; Jepson Flora Project 2019). It is presumed <br />extirpated from San Joaquin, Stanislaus, and Yolo counties. It typically grows on <br />saline or alkaline soils in chenopod scrub, meadows and seeps, and sandy valley <br />and foothill grassland habitats (CNPS 2019). The microhabitat for heartscale <br />includes sandy soils in alkaline flats and scalds in the Central Valley (CDFW <br />2019). Heartscale is threatened by competition from non-native plants (CNPS <br />2019). This species has moderate potential to occur within the Study Area based <br />on the presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-18, and MM BIO-19 <br />would reduce potential impacts to heartscale to: Less than Significant with <br />Mitigation Incorporated. <br />Crownscale (Atriplex coronata var. coronata) <br />Crownscale has a CRPR of 4.2, but it is not listed under FESA or CESA. This <br />species is an annual herb in the goosefoot family that blooms from March <br />through October (CNPS 2019). It is endemic to California, and its current range <br />includes the southern Sacramento Valley, the San Joaquin Valley, and the <br />eastern Inner South Coast Ranges (CNPS 2019; Jepson Flora Project 2019). It <br />typically grows in chenopod scrub, valley and foothill grassland, and vernal pool <br />habitats (CNPS 2019). The microhabitat for this species includes fine, alkaline <br />soils, and clay soils (CDFW 2019). Threats to this species have not been <br />identified (CNPS 2019, CDFW 2019). This species has moderate potential to <br />occur within the Study Area based on the presence of potentially suitable habitat.