The dump truck will almost surely be a 3500HD with the 10 lug by 7.25" bolt circle pattern, no, those will not fit a regular 3500, not without some custom one-off adapters, anyway.
There are 19.5's that are direct bolt to a regular 3500 truck, 8 lug by 6.5" bolt circle, most commonly found on the Frito delivery step vans, due to that most people call 'em Frito 19.5's. You can find them if you dig around enough boneyards or even look on eBay.
3500HD 19.5 10 lug -
Frito 19.5's 8 lug -
Note the other most obvious difference besides the bolt pattern, the 10 lug wheels have 5 hand holes, the 8 lug have 4.
Richard