Commercial Aviation Air Taxi.

DOE-STD-3014-96

2. Commercial Aviation Air Taxi.

Step 11. Refer to Appendix B, Table B-15, and obtain the appropriate site-specific or

generic value for NPf(x,y).

Step 12. Multiply the value NPf(x,y) by the A value determined for air taxis in Step 5.

3. Large Military Aviation.

Step 13. Refer to Appendix B, Table B-15, and obtain the appropriate site-specific or

generic value for NPf(x,y).

Step 14. Multiply the value NPf(x,y) by the takeoff effective area value, A, determined for

large military takeoff in Step 5. The takeoff effective area, A, is used because it more

closely represents in-flight crashes.

4. Small Military Aviation.

Step 15. Refer to Appendix B, Table B-15, and obtain the appropriate site-specific or

generic value for NPf(x,y).

Step 16. Multiply the value NPf(x,y) by the takeoff effective area value, A, determined for

small military takeoff in Step 5. The takeoff effective area, A, is used because it more

closely represents in-flight crashes.

Helicopter Aviation. Based on an analysis of historical helicopter crash

data, the contribution to impact frequencies associated with nonlocal

helicopter overflights is insignificant and need not be considered in the

impact frequency calculations. However, it is necessary to consider

local overflights, either planned overflights associated with the facility

operations, e.g., security flights, or flights associated with area

operations, e.g., spraying flights. Thus, the calculation of in-flight

helicopter impact frequencies is a site-specific calculation. For