This is no longer a puzzle cache. It is at the listed coordinates, just remember to use maximum stealth.
No need to do the following right now unless you want to learn about La Mesa.
Here's what you need to find out:
What is the official address of MacArthur Park? _ _ _ _ Memorial Dr, La Mesa 91942
How many acres is MacArthur Park? Round to nearest whole number. __
Mayor Ben Polak presided over La Mesa for MacArthur Park's creation. How many years did he serve as mayor? __
How many acres did the old golf course occupy? __
Add all the numbers together and subtract 3,110 to solve for the combination.