Please note that you will need to bring with you a specific TOTT, namely a charged 9V Battery.
You will find at Ground Zero a few of these containers in the general area, but you need to concentrate on only one at GZ.
When you get there I hope that you will be able to figure out what to do with the battery, once you do that you will be able to see some shapes.
In order to open the combination to the lock that holds the small Cache container that holds all of the goodies you need to answer the following questions. ( You do not have to use it but to double check your work you can input your answers into the Certitude Geocheckers below.
Do not force the lock, when you have the correct combo it will open easily.
Question #1 - "A" How many of this shape do you see? (This is the first number for the combo lock)
You can enter your answer here in Checker number 1 to verify if it is indeed correct... Note: you need to input the number and the type of shape, for example if you see 2 Octagon shapes you input "2octagons"

You can validate your puzzle solution with certitude.
Question #2 - "B" How many of this shape do you see? (This is the second number for the combo)
You can enter your answer here to verify the second number of the combo in Checker number 2...
Note: you need to input the number and the type of shape, for example if you see 2 Octagon shapes you input "2octagons"

You can validate your puzzle solution with certitude.
Question #3 - "C" How many of this shape do you see? (This one may be tricky) (This is the 3rd number that will unlock the lock)
Note: you need to input the number and the type of shape, for example if you see 2 Octagon shapes you input "2octagons"
You can verify this number in Checker number 3

You can validate your puzzle solution with certitude.
If you got 3 green lights then you are ready to open the Lock, and retrieve the Cache