(a) If the investigation by the OSC shows that a discharge is a worst case discharge as defined in the ACP, or there is a substantial threat of such a discharge, the OSC shall:

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(1) Notify the NSFCC;

(2) Require, where applicable, implementation of the worst case portion of an approved tank vessel or facility response plan required by section 311(j)(5) of the CWA;

(3) Implement the worst case portion of the ACP required by section 311(j)(4) of the CWA; and

(4) Take whatever additional response actions are deemed appropriate.

(b) Under the direction of the OSC, the NSFCC shall coordinate use of private and public personnel and equipment, including strike teams, to remove a worst case discharge and mitigate or prevent a substantial threat of such a discharge.