Grease and oil removal

I have to date, Pressure washed the engine after purple power solvent application, used two cans of foaming engine cleaner and rinsed with " Hudson" sprayers to remove the dissolved grime, and a second coat of foaming cleaning degreaser with another rinse down of water. The final result being more cleaning required, this engine is a grease pig. I am worried about the amounts of debris an oil slick that it has produced in my driveway and in the storage lot it is in. The old owners ran this bus until the leaks coated everything with oil and debris until the clean up is monumental.