The "March Chemical Company" gate was the same set as the lumberyard in The Judge (1958), which aired two weeks earlier.
While they don't give the city, the address given for the suspect is the actual address of the house used as the suspect's house.
The suspect steals a truck with 55 gallon drums of potassium in the back of the truck. Potassium metal can react violently with water producing potassium hydroxide and hydrogen gas. This reaction is exothermic and releases sufficient heat to ignite the resulting hydrogen in the presence of oxygen.
Suspect Larry Bolton's personal car is a black 1958 Plymouth Plaza 4 door Sedan. The "March Chemical Company" vehicle is a 1952 Dodge B3B Panel Truck. Policewoman Eleanor Scott's vehicle is a 1958 Buick, either a Roadmaster Riviera 4 door Sedan or a Super Riviera 4 door Sedan. Dan Mathews' patrol car is a 1958 Dodge Coronet.