Thank you for your diligence in tracking these down Ghera.
As an "East Coast Man" as Nelson Brenner would say, I had never heard of Westlake until it was mentioned in "Dawn's Early Light" ("the explosion was heard all the way to Westlake"). I looked it up and it's such a tiny community for the LA area (~8000 people).
And yet, it had at least two mentions in Columbo. :+1: