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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 102 <br />through October (CNPS 2019). It is endemic to California, and its current range <br />includes the San Joaquin Valley and San Francisco Bay Area (CNPS 2019; <br />Jepson Flora Project 2019). It is presumed extirpated from Solano County. It <br />typically grows in valley and foothill grasslands (CNPS 2019). The microhabitat <br />for big tarplant includes dry hills and plains in annual grassland with clay to clay- <br />loam soils, often in burned areas (CDFW 2019). Historical occurrences of this <br />species were likely extirpated by agriculture and non-native plants. Current <br />threats to this species include urbanization, disking, residential development, and <br />non-native plants (CNPS 2019). This species has moderate potential to occur <br />within the Study Area based on the presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to big tarplant to: Less than Significant with Mitigation <br />Incorporated. <br />Watershield (Brasenia schreberi) <br />Watershield has a CRPR of 2B.3, but it is not listed under FESA or CESA. This <br />species is a perennial rhizomatous herb in the fanwort family, and it blooms from <br />June through September (CNPS 2019). The current range of this species in <br />California includes the Klamath Ranges, North Coast Ranges, High Cascades <br />Range, High Sierra Nevada, Modoc Plateau (except the Warner Mountains), and <br />Sacramento Valley (CNPS 2019; Jepson Flora Project 2019). It typically grows in <br />freshwater marshes and swamps, including both natural and artificial water <br />bodies (CNPS 2019, 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. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-18, and MM BIO-19 <br />would reduce potential impacts to watershield to: Less than Significant with <br />Mitigation Incorporated. <br />Valley Brodiaea (Brodiaea rosea ssp. vallicola) <br />Valley brodiaea has a CRPR of 4.2, but it is not listed under FESA or CESA. This <br />species is a perennial bulbiferous herb in the brodiaea family, and it blooms from <br />April through May, and sometimes in June. This species is endemic to California, <br />and its current known range includes the eastern Sacramento Valley. It typically <br />grows in vernal pools and swales within valley and foothill grasslands. The <br />microhabitat for valley brodiaea includes old alluvial terraces, and silty, sandy, or <br />gravelly loam. Threats to valley brodiaea include urbanization (CNPS 2019). This <br />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 valley brodiaea to: Less than <br />Significant with Mitigation Incorporated.