You can validate your puzzle solution with certitude.
Thank you to teamajk for playtesting this puzzle!
Note (not part of the puzzle): The cache is not in a particularly dangerous area, but Oakland is a city with some rough edges. Please use caution and stealth when retrieving the cache. It may be safer during daylight hours.
Congrats to thanman2 (and Fizzymagic) for FTS and jeremiahsjohnson for FTF.
9/24/17 - The original cache location has been compromised. I have hidden a replacement about 150 feet away. The puzzle has not changed. Enter the puzzle solution into Certitude for revised coordinates and a new hide hint. 01/04/21 - The replacement location was also compromised! I've hidden a replacement about 20 feet away. The puzzle has not changed. Enter the puzzle solution into Certitude for revised coordinates and a new hide hint.