[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Ringelmann Charts



Alex: I haven't used one for years, so I don't know if they are still in 
use. However, you might try the California Air Resources Board at

http://www.arb.ca.gov/homepage.htm. I notice that Ringelmann is still shown
in their glossary. At this site they have a (contact us).

Hope this helps.

Bob Lanphear
Western Regional Pollution Prevention
Information Clearinghouse
%DTSC/OPPTD
P.O. Box 806
Sacramento, CA 95812-0806
800-700-5854
(fx) 916-327-4494
rlanphear@dtsc.ca.gov