22-8 Traffic

Water Supply Plan - Johnston

22-8 Under the water plan, is it correct that the worst case scenario you present is that oil tank depletion (2 MG) will equal 19 trucks per day to replenish, or 38 trips to and from the site? Is this a guarantee? Please explain.


RESPONSE 22-8

The worst-case-scenario presented is a total of 22 trucks per day following an oil fired event as indicated in the traffic analysis, Appendix E to the Water Supply Plan. The analysis assumes approximately 13 water trucks (2 for normal operation and 11 for water replenishment), 7 oil trucks, and 2 additional trucks consisting of either 1 aqueous ammonia truck, 1 wastewater truck or 1 mobile demineralizer trailer.

No, this is not a guarantee but represents a reasonably conservative estimate of the number of trucks per day that are expected.  It is difficult to guarantee because there could be weather events or unexpected disruptions that could cause the number of trucks during one day to be less and correspondingly the number could be more on the following day.