Caves and their features form when rainwater follows the cracks or joints in the rock material, usually limestone or dolomite. The rainwater combined with carbon dioxide forms a weak acid called carbonic acid. This weak acid once in contact with the limestone begins to dissolve the limestone. This process slowly creates larger and larger crack and joints.
A service contract inventory assists an agency in better understanding how contracted services support the mission and operations and whether the contractorsâ skills are utilized in an appropriate manner.
(c) Indefinite-delivery contracts may provide for any appropriate cost or pricing arrangement under Part 16. Cost or pricing arrangements that provide for an estimated quantity of supplies or services (e.g., estimated number of labor hours) must comply with the appropriate procedures of this subpart. 16.502 -- Definite-Quantity Contracts.