PS1851 Public Building Commission of Chgo Video Surveillance Program-Physical Security and Risk Assessment Consulting-Consultant, Elert & Associates Networking Division, Inc. Contract PDF: PS1851 – Physical Security and Risk Assessment Consulting Services Other Documents: Amendment 1 – Physical Security and Risk Assessment Consulting Services Amendment 2 – Physical Security and Risk Assessment Consulting Services Amendment 3 – Physical Security and Risk Assessment Consulting Services Awarded to: Elert & Associates, Inc. Board Approval Date: 01/12/2011