Section 21.65 - Spill Prevention and Control(1) Immediate action must be taken by the person responsible for any fuel spillage to prevent said fuel spillage from entering into drainage ditches, gutters, bodies of water, or into sewer systems or storm drains of the Airport.(2) Any person or agency causing any fuel spillage during fuel transfer operations or otherwise, shall be responsible for all consequences arising therefrom.(3) Persons responsible for large fuel spillage (six feet or more in diameter) shall immediately notify or cause to be notified with the least delay, the Emergency Crew Headquarters. Upon notification, corrective action will be immediately initiated at the discretion of the Fire Controlman and at the expense of the responsible person or agency.(4) Conditions within large fuel spill areas shall be left undisturbed (except as required above by 740 CMR 21.65(1)) pending the arrival of the Airport Emergency Crew.(5) Persons responsible for small fuel spillage (less than six feet in diameter) shall cause a fire guard to be posted and the spill to be promptly cleaned up using techniques recommended by the National Fire Protective Association.(6) No person shall proceed with any operation which is likely to result in fuel spillage without prior approval of the Fire Controlman.