Sue - can you look at the attached info and take a shot at completing this 
summary.  we ought to ahve this on file for both TW and NNG.  we need to 
attach the sampling data that i think i have a copy of somewhere...i'm 
attaching the tw info.  i'd like to discuss how we might characterize both 
systems.  (I get first shot guys then we can argue over it.)  thx