Wash it at the car wash in the town you bought it in.  This leaves the majority of OM off farm.  Then it will be cleaner when it comes for final cleaning and disinfecting at your farm.

You may want to fact check the info on no disinfectant for pedv.  I thought Tektrol, Synergize, and bleach all were effective.  www.pork.org has a ton of info on it and if you sign up you can get weekly emails.