Paperwork Reduction Act Statement: A federal
agency may not conduct or sponsor, and a person is not required to respond
to a collection of information unless it displays a currently valid OMB
control number. Public burden for the collection of this information is
estimated to average 3 hours per response. Comments regarding this collection
of information should be directed to the Bureau of Clearance Officer, U.S.
Geological Survey, 807 National Center, Reston, Virginia 20192. OMB Control No.
1028-0078. Expiration Date: 01-31-2018