9 CFR §72.24

The litter and manure removed from cars, boats, or other vehicles and from pens, chutes, alleys, or other premises or inclosures which have contained interstate shipments of tick-infested animals, shall be destroyed or treated by the transportation or yard company, or other owner thereof, under APHIS supervision, by saturating it in the required concentration with a permitted dip listed in § 72.13, or shall be otherwise disposed of under prior permission received from the Administrator, APHIS.