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Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration vii refuge it will be avoided and a buffer will be established by a qualified biologist and flagged. f. If any special-status reptiles or amphibians are observed within the Impact Area, the on-site biologist will determine if the work can continue without harm to the individual(s). If the biologist determines that it is not safe to continue work, all work will cease until the animal has left the Impact Area. Once the individual(s) is determined by the on-site biologist to have left the Impact Area and is out of harm’s way, work may resume. g. Piles of rock, rip-rap, or other materials that could provide refuge to reptiles or amphibians will be avoided. If movement of such materials cannot be avoided, a qualified biologist will survey the area prior to disturbance and monitor the material movement and restoration of the area following completion of Proposed Project activities. MM BIO-3: Western pond turtle a. In areas with the potential for western pond turtle to occur, pre-activity presence/absence surveys for western pond turtle shall occur within 48 hours prior to the onset of project activities at any Impact Area. b. If Western pond turtles are observed on land during the pre-activity surveys, the area within 100 meters of the boundary of the aquatic habitat will be flagged and avoided if feasible. c. If western pond turtles are observed within the Impact Area during a pre-activity survey or during project activities, they will be relocated outside of the Impact Area to appropriate aquatic habitat by a qualified biologist. MM BIO-4: Giant garter snake a. Upland habitat within 200 feet of suitable aquatic habitat, that is suitable for giant garter snake (containing cracks or rodent burrows) will be flagged and avoided. b. On-land soil investigations within suitable upland habitat for giant garter snake will be conducted during the snakes active season of May 1 through October 1. MM BIO-5: Rookery Birds To minimize and avoid the potential impacts to special-status rookery birds that may occur within the Study Area the following general measures will be implemented: a. A pre-activity survey for active rookeries will be conducted (during nesting season between February 1 – August 31) a maximum of 72 hours prior to the onset of soil investigation field activities. The qualified biologist(s) must, at a minimum, have