There is a phone number on the drinking water sample stand. That number (ten digit version) contains several distinct digits.
A=the lowest non-zero digit that DOES NOT occur in the phone number.
B=the higher one that occurs only twice.
C=the lower one that occurs twice.
D=the one that occurs three times.
E=the higher one that only occurs once.
The coordinates for the cache are:
N47 41.(A+D+C)(D-C)(D+A)
W122 07.(D+A)(E-A)(E-C)