I am thinking of taking up Carbon printing. This is something I have been thinking about for quite a while, but haven't made the push to start primarily because of concerns about the chemicals (Potassium Dichromate). I am on a septic system and worried about poisoning myself or the ground water. Can this be done in a safe and environmentally sound manner? What steps and precautions would need to be taken. I do have a local hazardous waste collection every couple of months during the warm weather. I don't think it would be feasible to haul all my wash water there however. But I could certainly collect small amounts for processing. I also do not have a fume or dust hood, so I am worried about mixing the chemicals because of the dust. Are my concerns justified? Any tips on how to do it right?