This container is in Charlestown Park which is open only dawn to dusk. Alcoholic beverages are not allowed in the park. So no beer. But maybe you will see some fish. Probably not live swimming ones, but maybe.
Posted coordinates are for an information sign about the Little Conestoga Creek Watershed Alliance. There are definitely fish pictures on the sign. Look at the sign to collect the information to find the small container hidden in a log beside the creek. Be sure to close the container completely after signing the log.
N 40 1.AAB W 76 21.XYZ
A is the number of ABUNDANT FISH pictured minus the number of STOCKED GAMEFISH pictured (upper right of sign). Use A for both the first and second digit. Yes, use it twice.
B is the number of RARE FISH pictured divided by 3. (lower left of sign)
X is the number of letters in the common name of the COMMON FISH pictured furthest to the right (left side of sign but somewhat middle). Its scientific name is Lepomis macrochirus.
Y is the number of COMMON FISH pictured that have "dace" as part of their common name.
Z is the number COMMON FISH pictured that are facing/heading left. Hint: it's not half.
Checksum of A + B + X + Y + Z is 22. Use A only once in the checksum.
In your log, you might mention one of the fish especailly if you see any in the creek.