Generally a NOI and or POO is for using mechanized equipment and creating more than minimal ground disturbance, ie. backhoe, dozer, etc..
If you wind up having to file a NOI, be prepared to wait a long time for it to be approved or denied.
If you are using a recirculating mini banker in a tub, shouldn't have any problems, but like Bill said, names and times.
If you don't get anywhere with the USFS on the district or forest level, go to the regional office. I'd also research what the main USFS (inDC) requirements are, sometimes regional and National Forests put their own spin on interpretaion of rules.
If not using a tub then you might have to go to settling pond type setup so any sediment doesn't get back to the waterway.