Why would spilled milk need a hazardous materials team? [View All]

[Horse with no Name]

First of all, my condolences to the family of the driver killed in this horrific wreck, but growing up on a dairy I recall during the Reagan years milk trucks emptying their milk on the ground all over Texas when he regulated the price of milk but not the price of feed--dairy farmers dumped their milk instead of selling it.
However, this man was in a wreck that the milk truck overturned and caught on fire. Why would a milk spill need a hazardous materials team?
I wish I knew the answer. This one baffles me.
http://www.myssnews.com/news-telegram/news/1628-milk-truck-driver-dies-in-fiery-crash-monday.html
>>>snip
Pickton-Pine Forest, Hopkins County, Como and Winnsboro firefighters were dispatched to the location, along with Hopkins County Emergency Medical Services personnel, sheriff’s deputies, state troopers and hazardous materials teams.

Firefighters battled the blaze but were unable to immediately get to the trapped driver. The blaze was extinguished at 4:13 p.m.

After the fire was out, firefighters used a rescue tool to cut the top of the cab off in order to remove the driver’s body from the truck.

The truck driver was pronounced dead at the scene by Precinct 1 Justice of the Peace Yvonne King. Hopkins County Precinct 2 workers were requested to bring a back-hoe to the location due to the spilled milk and damages. Dispatchers were also asked to notify state environmental officials about the spill.