I'm going to have to go back and check my books of standards (I used to be able to remember these things). I have run across this map in the body of an ASTM Standard, which used it as a reference for determining whether you are in a severe, moderate or mild weather area. Seems to me it was a map of the US with zones numbered from 1 to 3 filled in. San Francisco was a 3 - mild. Salt Lake City was a 1. Lots of freeze thaw.  

Mike E.  
  
----- Original Message -----
From: Leland Torrence
Sent: Tuesday, March 26, 2002 5:12 PM
To: [log in to unmask]
Subject: Can't see the map for the fog
  
Mike,
    Where's the ASTM map?  And what do you think is the effect of the San
Francisco fog?  I read that Robyn Williams was impressed with our efforts to
improve security since 9/11.  In particular he noted the sneaky efforts of
the guard in their large Hummers and camouflage hidden against the bright
orange Golden Gate bridge.  He imitates in his Elmer Fudd voice,  "Be vewy,
vewy, quiet, cause we're wooking for tewowists."
    I read somewhere that the acid content in the rain in the Connecticut
area had been about the same for the last 100 years.
    The acid from ivy has been much more of an issue for masonry in the ivy
league and Elm City.
Best,
Leland

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