Waltham Fire Incedent Codes
I happened to have a few Firefighters come to where I work one day for an inspection, and I casually asked the lead Firefighter about the codes.
He told me at that time, all communities are using their own customized versions but that would be standardizing in the future.
He gave me a laminated card with Walthams codes on both sides. I copied it, took it home, and put it all into an Excel spreadsheet.
Here is an attached copy for anyone who would like Waltham Fire's codes.
(until they change)