The cache is at the listed coordinates. To log it as found, please sign the log and meet the challenge requirements.
To claim this challenge as a find, you must find 8 of the 10 oldest caches in Alameda County. Those 10 caches will be different for everybody, because archived caches you have found count! In other words, your 8 oldest finds in Alameda County have to be older than the current 10th-oldest cache in the county. This way, if you are working on the challenge and a cache gets archived, you don't have moving goalposts!
Here's a checker to do the hard part for you: