Phred's birthday is the 30th of July! He is now THIRTEEN (68 in Human years)! On his FIFTH birthday, he hid a very devious geocache. This one won't be nearly as hard; he promises!

What was the most special about that one, was the GC CODE. It is GC30XXX! His birthday is on the 30th, the GC had the number 30, and XXX is Thirty in Roman Numerals. This birthday is no different, as he has another very special GC code. The only problem is that they spelled his name wrong!!! Really, this GC should be GC7Phred. Did you know that se7en is a neutral Ph level?
There is nothing here for you either
This geocache is NOT at the posted coordinates, Phred isn't a big fan of swimming. Know what he is a big fan of? Eating! The final is located at N39 3x.xxx W104 4x.xxx. Good luck!
For Phred, there are only TWO food groups: food he likes, and food he dislikes. He likes limes. He dislikes graham crackers. Another food that he likes is string beans. He also dislikes pure water. He also likes tomato juice AND ketchup. He dislikes acid rain AND 7UP. Somehow he even likes sea water as well. The last thing he dislikes is hand soap (single digit).