The following video was taken on 12-24-13 with an Inspector Plus geiger counter by 'Dave' giving readings on a Northern California beach due West of San Mateo. The beach is south of Princeton Harbor which in turn is just south of Pillar Point where 'Mavericks' big surf comes in. The best description is the San Mateo Coast. Just south again from Princeton Harbor begins the City of Half Moon Bay.

As you will see, the normal background radiation above the small bluff at this beach is about 30 CPM (Counts Per Minute).
The video is self-explanatory and we are greatly indebted to Dave for making it and sending it in. Today's readings on the beach were taken standing up...with the Inspector about 5 feet off the ground.

WATCH THE VIDEO OF THE BEACH RADIATION HERE!

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On Thursday, 12-19, four days earlier, Dave went to the same beach but with a plastic bag for his Inspector. He placed it down about 2 inches above the sand and got radioactive readings of 412 Counts Per Minute (CPM)..over 13 TIMES NORMAL BACKGROUND of 30 CPM. See the readout chart below...