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more consecutive days of plugging and monitoring, the den shall be excavated when, in the judgment of the biologist, it is temporarily vacant. b. Destruction of the den shall be accomplished by careful excavation with hand tools until it is certain that no kit foxes are inside. The den shall be fully excavated and then filled with dirt and compacted to ensure that kit foxes cannot re-enter or use the den during the construction period. If at any point during excavation a kit fox is discovered inside the den, the excavation activity should cease immediately and monitoring of the den as described in (1) above shall resume. Destruction of the den may be completed when, in the judgment of the biologist, the animal has escaped from the partially destroyed den. C. Kit fox den excavations and pre-excavation monitoring shall be conducted by a qualified biologist, as defined above, or under the direct supervision of a qualified biologist. Staff biologists of the project proponent may conduct den excavations only if they are previously trained in the procedure by a qualified biologist. d. Consultation with the FWS and/or DFG, as appropriate, in compliance with the federal and/or state Endangered Species Acts, shall be required prior to destruction of a known kit fox den in which kit fox activity is observed during the three (3) day monitoring period specified in measure 2.a. above. e. If a known kit fox den is found, but will not be destroyed by grading or other development activities, a protective exclusion zone shall be established around the den. If construction activities take place between July and December, the exclusion zone shall be 300 feet; the exclusion zone around a pupping den shall be 500 feet. If construction activities take place between January and June, a 1,000-foot buffer around the den shall be provided. Human activities should be restricted within the exclusion zone; vehicle operation, construction, Page 2