http://www.phmsa.dot.gov/hazmat/library/erg

This is the book you want to understand haz mat placards and response requirements. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Loren Busch
Sent: Thursday, April 12, 2012 10:02 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Friday Flamers US DOT HazMat Placards (EnvironmentalChemistry.com)

 RE: Haz Mat signs on trucks
Thanks for all the responses pointing to info.  I'd found the long detailed lists and general references before.  And from what I'd found plus what has been pointed out to me it's not a simple answer.  I was hoping, naively, that being able to read and understand the haz mat sigens would be a simple thing.  But in fact, and logically, the list of things and combination of things is long and no simple reference/lookup sheet is possible.  Maybe if I look a little closer I'll find some groupings identifiable from colors or color combinations?  Maybe I'll spend a little more time at this subject.