George,
when I spoke to the enviromental health chap oil and grease were not mentioned as I won't do engine cleans due to the hike in insurance premiums.
The TFR and the likes were the main talking point in my case, just as a matter of interest The wheelie bin council approved van
was in my street today in his van was a 5hp honda pressure washer and a 600lt water container,nothing else, I watched them pressure wash the bin swill it around then dump all the contents onto the middle of the road and drive off, it makes my blood boil when I see such practices as he has been going for over a year now makes loads of money (fact) but gives everyone ellse a bad name, local authorities must know he does this as he is council approved or is he I ask myself,anyway nothing to do with me just having a moan had a bad day, pleased there was no mention of my waste water going through a separator prior to ditching down the sewer drain though, have a busy profitable day.
Malky