At the Jobsite, similar instruction was given to office employees with the purpose of familiarizing them with the handling of clasgified documents, In addition, the Jobsite Security Officer gave instructions to supervisory employees at staff conferences. When an employee terminated from the Jobsite or the Home Office, a thorough termination security interview was held, stressing control of whatever classified AEC information to which he may have had access. A security termination statement was then signed by him, and he was required to turn in his identification card and anything else of an official nature which he may have had, Finally, if the terminating employee was not to be rehired, the security termination statement was forwarded to the AEC and the person's clearance was terminated. (An outline of this interview is presented as an exhibit at the end of this section.) At a very early stage of the operation of the Contract, a Security and Correspondence Manual was prepared and issued by the Security Division, It proved to be extremely useful in the indoctrination of employees, particularly those in key positions and those engaged in secretarial work, This manual contained the more important of the AEC General Manager's Instructions, such as GM-37, "Procedures for Handling Classified Matter"; GM-153, "Physical Security Standards for AEC Facili- ties"; GM-2, "Transmittal - Documents and Materials"; Gi-59, "Responsi- bility for Security"; and GM-19, "Top Secret Control." Also included were applicable directives issued by the Santa Fe Operations Office, such as SF-122, "Administration of Contract No, AT-(29-1)-507"; SF-3, "Personnel Security Clearance Policy and Procedure"; SF-181, "Down- grading of Classified Documents"; and bulletins and notices issued by the Holmes & Narver Security Division covering a variety of subjects and intended in general to clarify current directives and to disseminate new security requirements and information. Among the subjects covered in Holmes & Narver Security Bulletins were classification, guard orders, special instructions on handling of classified documents, special instructions on handling of classified teletypes, visits to AEC and other classified installations, news releases, Jobsite nomenclature, reprints of AEC Security Newsletters, visitor control, etc. Inaddition to the above, the manual contained complete instruc- tions on the marking, preparation, transmission, and handling of classified and other correspondence, These instructions contained samples of all types of correspondence, with the markings required for the various security classifications. Included were letters, interoffice correspondence, cover sheets, routing slips, receipt forms, inner envelopes, and outer envelopes. These instructions were used extensively by secretarial personnel and found to be very helpful both at the Jobsite and in the Home Office, Visual media were found to be of considerable value in constantly reminding all employees of the ever present need for vigilance in the preservation of security, Security reminders were made by means of 7-19