Access to Hall A is governed by the ``Jefferson Lab Beam Containment Policy and Implementation'' document. This document can be found in the Jefferson Lab ES&H Manual (Section 6310, Appendix T2). Work in designated radiation areas will be governed by the Jefferson Lab RadCon Manual. Access procedures during Research Operations depend on the number of individuals who will be entering the hall and the length of time they are expected to be there. A controlled access is used when a few individuals require entry for a short period of time. If the hall must be open for an extended period and many people will enter, then you should use the restricted access procedure instead of the controlled access procedure. Normally, when requesting a controlled access, the hall will be in either the Beam Permit or RF Permit State - for example, if the beam has been on or it could be shortly. If the hall is not already in the Controlled Access state when you wish to access it, you must request a change to that state from the Machine Control Center at extension 7050 and indicate that you intend to make a Controlled Access. The MCC will then send an Assigned Radiation Monitor to survey the hall. Before anyone enters the hall, the ARM will carry out a radiation survey and post radiation areas. Subsequent entry by individuals during the same Controlled Access period does not require an ARM survey.