The container is a large peanut butter jar, but not quite bigly enough to be a "large" geo container.
At GZ you will find a plaque titled Hercules Path to Transit. You need the dedication date.
Convert the month to its numerical equivalent. Add the 6 digits together to get X.
X²+537=N and X²+265=W (38 00.N and 122 17.W)
Check sum all digits=61
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