Dave,
Exposure limits are the same,but of course when dealing with plutonium,the controls to minimize the exposures are much different than they are when dealing with less risky nuclide's.
It also depends of what form of contamination your dealing with.When I was at the 903 pad at RF,we we re mediating soil down to 60 pCi/gr.
The material we were dealing with had very high enrichment characteristics up to 8.5 to 1,but since we were dealing with contaminated soil, a large movable containment over the excavation controlled our area very well.(Along with misting techniques)
Bldg 559 was a different matter.We were disassembling glove boxes that were contaminated with large amounts of oxide.You cant use misting techniques because CSOL's usually will not let you introduce a moderator to the material(depending on gram estimates and geometry of your area),you will usually rely on bag outs,very careful RCT's, and a good Rad engineer to design ventilation for your work containments,to minimize workers exposure's but it can be very difficult.
I swear,the s#$% has legs and regardless of your controls,seems to get away from you.
Give me a call and let me know more specifically your situation , and ,I can probably give you some good ideas.
Edited for language