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• Surveys shall be conducted by a qualified biologist prior to any tree removal <br /> or building demolition. Removal of trees and structures shall occur when <br /> bats are active, approximately between the periods of March 1 to April 15 <br /> and August 15 to October 15; outside of bat maternity roosting season <br /> (approximately April 15 —August 31) and outside of months of winter <br /> torpor(approximately October 15—February 28), to the extent feasible. <br /> • If removal of trees and structures during the periods when bats are active is <br /> not feasible and active bat roosts being used for maternity or hibernation <br /> purposes are found on or in the immediate vicinity of the site where tree and <br /> structure removal is planned, a no disturbance buffer of 100 feet shall be <br /> established around these roost sites until they are determined to be no longer <br /> active by the qualified biologist. A 100-foot no disturbance buffer is a <br /> typical protective buffer distance; however, buffer width may be modified <br /> by the qualified biologist depending on existing screening around the roost <br /> site(such as dense vegetation or a building) as well as the type of <br /> construction activity which would occur around the roost site. <br /> • The qualified biologist shall be present during tree and structure removal if <br /> potential bat roosting habitat or active bat roosts are present. Trees and <br /> structures with active roosts shall be removed only when no rain is <br /> occurring or is forecast to occur for 3 days and when daytime temperatures <br /> are at least 50°F. <br /> • Removal of trees with potential bat roosting habitat or active bat roost sites <br /> shall follow a two-step removal process: <br /> 1. On the first day of tree removal and under supervision of the <br /> qualified biologist, branches and limbs not containing cavities or <br /> fissures in which bats could roost,,shall be cut only using chainsaws. <br /> 2. On the following day and under the supervision of the qualified <br /> biologist, the remainder of the tree may be removed, either using <br /> chainsaws or other equipment(e.g. excavator or backhoe). <br /> Removal of structures containing or suspected to contain potential bat roosting <br /> habitat or active bat roosts shall be dismantled under the supervision of the <br /> qualified biologist in the evening and after bats have emerged from the roost to <br /> forage. Structures shall be partially dismantled to significantly change the roost <br /> conditions, causing bats to abandon and not return to the roost. <br /> Site(s) affected: All sites within the proposed Zone. <br /> (Draft SEIR, pp. 4.E-9 to 4.E-14.) <br /> Impact 4.E-lc <br /> Development facilitated by the proposed Zone could potentially have a substantial <br /> adverse effect on federally protected wetlands. <br /> 28 <br />