California has mobilized hundreds of thousands of citizens to clean up debris along the beaches, including debris from the 2011 Japanese Tsunami. This catastrophic event resulted in radioactive debris being sent into the Pacific ocean from the severely damaged Fukushima Diiachi Nuclear Power Plant.  Volunteer debris collectors clean up any debris they find and gather critical information about the Japanese tsunami debris using a comprehensive data card. It is as if each volunteer is a guinea-pig in a massive experiment.
Tsunami debris began hitting the West Coast back in 2011 but according to the California Commission, “researchers believe that the first large waves of tsunami debris began hitting the California shores in Winter and Spring of 2013,” with subsequent waves expected to continue to hit the shores. 
Generous grants from National Oceanic and Atmospheric Administration(NOAA) and the California Emergency Management Agency (CalEMA) have spawned numerous volunteer debris programs including:
These volunteers have cleaned up millions of pounds of debris from California’s coastline in the last three years since the Japanese Tsunami.  This work was accomplished in everyday clothing with bucket in hand.  None of the citizens were provided protective gear just in case debris turned out to be radioactive. 
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A waiver?
"Each beach debris collector must sign a SECURED Waiver of Liability and Assumption of Risk which informs the debris collectors that:Cleaning up beaches involves “certain inherent risks” including environmental conditions.  ”This instrument exempts and releases “all parties” defined from all liability or responsibility whatsoever for personal injury, property damage, or wrongful death, however caused, including negligence of the released parties, whether passive or active”.  The release includes any lawsuit or claim for themselves, their family, estate, heirs, or assigns.” Should they become injured while participating in the Event they “authorize any physician or surgeon in the State of California to perform emergency or surgical treatment”."
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