AgdaPkt 2016-02-22 Closed and Interview and Joint SA PFA

Browse Search

APPENDICES City of Redwood City, Public Works Division Initial Study & Mitigated Negative Declaration 6 Blankinship & Associates, Inc. Plants Bolander’s water-hemlock (Cicuta maculata var. bolanderi) Bolander’s water-hemlock is a perennial herb in the Apiaceae family (CalFlora 2014). The species is found at various places within the United States including California, Arizona, New Mexico and Washington (CNPS 2014). Its habitat includes coastal salt marshes and swamps. It is included in the California Rare Plant Rank 2B.1 (rare, threatened, or endangered in California; common elsewhere) (CNPS 2014). According to the CalFlora Database there are no reported occurrences of this species within the project area (CalFlora 2014). Furthermore, the species is not an emergent plant and is not expected to grow in standing water, but may grow on moist banks of the Lagoon. Exposure of Bolander’s water-hemlock to water in the portion of the Lagoon containing aquatic herbicides is indirect, if any. Exposure will only occur through root uptake of soil water. The chemical properties of copper-containing algaecides and /or aquatic herbicides make it unlikely that copper will be able to move through soil pore water to the roots of the plant. As such, exposure to copper-containing algaecides and /or aquatic herbicides applied to the Lagoon is insignificant. Delta Tule Pea (Lathyrus jepsonii var. jepsonii) The delta tule pea is a rhizomatous perennial dicot in the Fabaceae family. The species is native and endemic to California. Its habitat includes both freshwater and brackish marshes and swamps (CNPES 2014). It is included in the California Rare Plant Rank 1B.2 (rare, threatened, or endangered in California and elsewhere). According to the CalFlora Database, there are no reported occurrences of this species within the project area (CalFlora 2014). Furthermore, the species is not an emergent plant and is not expected to grow in standing water, but may grow on moist banks of the Lagoon. Exposure of delta tule pea to water in the Lagoon containing aquatic herbicide is indirect, if any. Exposure will only occur through root uptake of soil water. The chemical properties of copper containing algaecides and/or aquatic herbicides make it unlikely that copper will be able to move through soil pore water to the roots of the plants. As such, exposure to copper-containing algaecides and/or aquatic herbicides applied to the Lagoon is insignificant. Mason’s Lilaeopsis (Lilaeopsis masonii) Mason’s lilaeopsis is rhizomatous perennial herb that can be found in freshwater or brackish-water marsh. This species is native to California and endemic to this state only. Its blooming period lasts from April through October. Mason’s lilaeopsis is often observed in tidal zones and on silty soil formed through river deposition or river bank erosion (CNDDB 2004). According to the CalFlora Database, there are no reported occurrences of this species within the Project area (CalFlora 2014). Therefore, the likelihood of exposure to copper-containing algaecides and/or herbicides is insignificant. Hairless popcornflower (Plagiobothrys glaber) Hairless popcornflower is an annual, dicot herb that is native to California (CalFlora 2014). It is included in the California Rare Plant Rank 1A (presumed extinct) (CNPS, 2014). According to the CalFlora Database, there are no reported occurrences of this species within the county of the Project area (CalFlora 2014). Furthermore, the species is not an emergent plant and is not expected to grow in standing water, but may grow on moist banks of the Lagoon. Exposure of hairless popcornflower in the Lagoon containing aquatic herbicides is indirect, if any. Exposure will only occur through root uptake of soil water. The chemical properties of copper-containing algaecides and/or aquatic herbicides make it unlikely that copper will be able to move through soil pore water to the roots of the plant. As such, exposure to copper-containing algaecides and/or aquatic herbicides applied to the Lagoon is insignificant. California seablite (Suaeda californica) California seablite is a dicot shrub that is native to California. It is included in the California Rare Plant Rank 1B.1 (rare, threatened, or endangered in CA and elsewhere). According to the CalFlora Database, there are no reported occurrences of this species within the county of the Project area (CalFlora 2014). Furthermore, the species is not an emergent plant and is not expected to grow in standing water, but may grow on moist banks of the Lagoon. Exposure of California seablite in the Lagoon containing aquatic herbicides is indirect, if any. Exposure will only occur through root uptake of soil water. The chemical properties of copper-containing algaecides and/or aquatic herbicides make it unlikely that copper will be able to move through soil pore water to 6.3.A. - Page 75