We have an application before us to construct a biodiesel processing plant in town. There is quite a bit of opposition to this and they're all pointing to "chemical manufacturing" which is listed in our regulations as prohibited in all zones. However, our regulations don't define "chemical manufacturing". Does anyone have a suggestion as to where they would go to find an accepted definition of chemical manufacturing so that the zoning and planning commission can have something to look at. I've checked with the DEP, EPA, and OSHA which all point to NAICS or SIC codes. I'd be particularly interested to see what people in towns/cities that have a biodiesel facility have to say.