the company I work for had enviromental health and the waterboard in awhile back and they asked how we wash the trucks as the drains go straight into the reservoir and they have had two cases of contamination in the past few months,
my boss tried to cover it up but they see the huge drums of TFR in the corner of the yard.

basicly gave him a few words of advice and told him if they can proof he is washing then trucks on site we will be fined big time