Work up based on chemical culprit
POC glucose
BMP
Calcium
Magnesium
Phosphorus
LFTs
VBG - concern for metabolic acidosis, carboxyhemoglobinemias, methemoglobinemias
CXR - concern for pulmonary edema
Hazmat exposure
Caustic cocktail
Drugs of abuse
Electrical injuries
Dirty bomb
Trauma 
Gun shot wounds
Sexual assault