The cache is NOT at the above coordinates.
You can find the cache at: N33° 47.ABC W117 48.DEF
Welcome to the Cities of North Orange County mini trail. There are 7 caches in this series (including this bonus) located along a section of the Santiago Creek Bike Trail adjacent to the Santiago Creek Recharge Basins between Villa Park and El Modena. Save the codes A-F from each of the city caches to determine the final coordinates of the bonus cache. Bring a TOTT to help retrieve the cache.