Section 120.815 - Facility Design(A) Any disposal method utilized at a facility shall permit retrieval and monitoring of the waste.(B) Retrieval of waste from disposal units must be feasible through the institutional control period without adversely affecting the ability of the facility to meet the performance objectives set forth in 105 CMR 120.811 through 120.814.(C) The Operator shall provide extensive security for the facility during the development, operation, closure, post-closure observation and maintenance, and institutional control of the facility for a period of time that ensures the health and safety of the general public and the environment. The Operator shall allow site community participation in this security planning process.(D) Any facility accepting waste for disposal shall, to the extent practicable, be designed, operated, closed and controlled after closure so as to maintain the gross physical properties and identity of such waste and containers for a minimum of 100 years for Class A waste, 300 years for Class B waste, and 500 years for Class C waste.(E) Any disposal facility shall have its engineered structures designed with the goal to totally hold their waste content for the period of the hazardous life of the radioactive waste (zero release design objective).