My neighbor uphill from my pond has just blacktopped their driveway. Previously it was rock and dirt. New blacktop is about 6000 sq ft and all runoff will go into my pond. I know that fresh blacktop will leach oil for a while. In Northern Central California, our daytime temps are regularly well above 100 degrees and it can really cook the pavement. Fortunately, we do not get rain here for another month or so and I have some time to prepare a defense against this runoff. While I have told them in the strongest terms that I will hold them responsible for any damages I may suffer, I must do something to prevent any oil infiltration into the pond. Any suggestions would be greatly appreciated.
Jim