In addition to the requirements of Subparts A and B of this part, a claimant must establish -
(a) That the actions taken were necessary to prevent, minimize, or mitigate the effects of the incident;
(b) That the removal costs were incurred as a result of these actions;
(c) That the actions taken were determined by the FOSC to be consistent with the National Contingency Plan or were directed by the FOSC.