Unusual number of test requests from Google on Nearby Notification URL

[avi885]

I was trying to analyse the type of traffic on my Nearby Notification URL and found a lot of requests coming from Google's IP. I am receiving an unusual number of almost 10 requests daily from Google. The number has gone up to even 28 requests in a day.

Does Google itself send so many requests each day to test the URL or is there a possibility that I may be getting Google's IP addresses for requests from other users also?