The welding shop call is given as 3563 Houston. When the medics arrive, the building number is 1900. While dispatch errors are a plot point, the fact is they went to a totally different address than the one they were given.
The dispatcher incorrectly calculates the time when Tyler is sitting in, stating 3 minutes on the call, then 5 minutes for the ambulance, 15 for the police, and 20 for animal control. First, if used end-to-end, this adds up to 43 minutes and she says 30 minutes. Second, since the arrival times begin at the time of notification (arrival times are not calculated end-to-end), the maximum time would be 23 minutes, not the 30 she stated.