How exactly does preparing food in the truck lead to food poisoning? Why doesn't your backyard grill need a fire suppression system?
2) Most cities fire code say that your backyard grill is required to be a certain distance from the building structure (my local ordinance says 15ft), it just so happens that most people ignore the local ordinances. Those codes are b/c of grill fires.
[1]: http://eresources.nlb.gov.sg/infopedia/articles/SIP_1637_201...