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City of Pleasanton—Hidden Canyon Residences and Preserve Biological Resources Draft EIR 3.3-28 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 have been observed on the site and the species is presumed absent due to the failure to detect them during numerous surveys from 2014 to 2023. Nonetheless, as burrowing owls are volant species, while unlikely, there is the possibility that burrowing owl may colonize the site prior to construction activity initialization on-site. Construction activities that adversely affect the nesting success or result in mortality of individual owls would constitute a violation of State and federal law and would be a potentially significant impact. Additionally, should burrowing owls occur on the site, the proposed project could result in the loss of breeding habitat for this species, and this would also be a potentially significant impact. Therefore, prior to mitigation, impacts to burrowing owl could be potentially significant. If present, the applicant would likely be required to obtain an Incidental Take Permit from CDFW. However, with implementation of MM BIO-1i, impacts to this species will be reduced to a less than significant level under CEQA. Level of Significance Before Mitigation Potentially significant impact. Mitigation Measures MM BIO-1a Compensation Measures for Congdon’s Tarplant The project shall compensate for the loss of tarplant on the project development area via the preservation of estimated individuals at a mean ratio of 8:1. However, per the East Alameda County Conservation Strategy (EACCS), mitigation for Congdon’s tarplant must also demonstrate habitat enhancement, not just preservation; therefore, a Resource Management Plan (RMP) shall be prepared and implemented, as described below by a qualified Biologist. At a minimum, the RMP shall include the following: • Party or parties responsible for implementation of the RMP. • Allowed and prohibited activities on preserved lands. • The locations and types of any fencing, signs and/or displays to be constructed on preserved lands. • A monitoring and management plan for non-native and/or invasive species considered detrimental to protected resources (i.e., weed abatement and invasive species removal). • The types, frequency, and timing of any maintenance activities to be conducted on preserved lands (i.e., litter removal, fence or sign repairs, fire prevention activities such as mowing, etc.). • A grazing and/or mowing component, and requirements of any grazing/mowing plan shall also be included. For grazing, this plan shall include applicable stocking rates (based on the best current information), how other sensitive resources occurring on-site such as riparian habitats will be protected (if necessary) and any monitoring requirements, such as the monitoring of Residual Dry Matter (RDM). A mowing plan shall include timing of mowing activities to best enhance habitat for this species.