Here's my archive of Monthly Newsletters (they were bi-monthly for a while there!) going back to May of 2011.  They're filled with informative articles that interpret and explain the following:

- Hazardous material transportation regulations of the PHMSA/USDOT.

- Waste management (hazardous, non-hazardous, used oil, & universal waste) regulations of the USEPA and states with authorized hazardous waste programs.

- Dangerous goods transportation regulations of IATA, ICAO, & the IMO.

- And more!