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City of Pleasanton—Hidden Canyon Residences and Preserve Biological Resources Draft EIR 3.3-42 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480016/EIR/3 - Draft EIR/21480016 Sec03-03 Bio Resources.docx Level of Significance Before Mitigation Potentially significant impact. Mitigation Measures MM BIO-3 Mitigation Measures for Aquatic/Wetland Habitats: Minimization To minimize impacts, measures taken during construction activities shall include placing construction silt fencing around preserved aquatic features and riparian areas to ensure that construction activities do not inadvertently impact these areas. As part of project buildout, all proposed lighting shall be designed to avoid light and glare impacts to preserved riparian corridors. Light sources shall not be visible from riparian areas and will not illuminate riparian areas or cause glare on the opposite side of the channels (e.g., to neighboring properties). Additionally, proposed development activities shall be designed and situated to avoid loss of trees within any riparian areas to the maximum extent practicable. Project construction must setback from the Tree Protection Zone (TPZ) of trees within the riparian area. A TPZ is defined as a circle whose center is within the base of an oak tree, the radius of which is equal to an oak tree's height or 10 feet, whichever is greater. Compensation A wetland/riparian Mitigation and Monitoring Plan (MMP) shall be prepared to compensate for a loss of approximately 0.25 acre of seasonal wetlands, 0.06 acre of a Roadside Drainage Ditch, and up to 0.06 acre of the loss of riparian habitat (see Table 3 of Appendix C1). The plan shall identify on-site preservation areas having a sufficient water budget (as determined by a Hydrologist) for the creation of seasonal wetland habitat that is of equal or greater quality to the seasonal wetland habitats being impacted at a minimum 2:1 creation:loss. If sufficient areas for the creation of wetland habitat cannot be identified on the preserve area, then the MMP shall include off-site mitigation, preferably within the same watershed, as an alternative strategy. At a minimum, the MMP shall: • Define the location of all created wetlands. • Provide evidence of a suitable water budget to support any created wetland habitats, as determined by a qualified Hydrologist. • Identify species, size, number, and location of plants to be installed. • Identify time of year for planting and any methods for supplemental watering during the establishment period. • Identify the monitoring period for wetlands of no less than 5 years and no less than 10 years for riparian creation/enhancement. • Identify measures that will be monitored, and define incremental and final success criteria that will be required for the wetland mitigation to be deemed a success.