Ok, I got a response today. From what I can tell, there were only three dates that made the cut. I would guess the 16th was chosen due to tides, but I am not sure. I am having problems downloading the file, but you can send me a message and I will forward it over to you. What is odd is how the numbers can change from week to week. . A couple of times one week was good with the next bad, and in one case only by a little on one test. But, from the looks of things it was all done correctly. If I am reading the data right, the following dates were the only ones that made the cut

4/9
4/16
4/22


Below is the letter I received.

Hi,
 
I’ve attached the razor clam biotoxin data for this last season.
 
We sample 4 sites along Long Beach during one sample run. All 4 sites need to test below 20ppm for domoic acid for the beach to open.
 
We coordinate our sampling with WDFW and when they want to open the beach for digging based on low tides.
 
If  levels are above 20ppm at any of the 4 sample sites the beach will remain closed. To open we require 2 sample sets (taken 7-10 days apart) to have all 4 sites test below 20ppm to reopen the beach.
 
If you have any questions about our sampling plan, please feel free to ask.
 
Thank you, Audrey
 
Audrey Coyne
Marine Biotoxin Coordinator
Office of Environmental Health and Safety
Division of Environmental Public Health
Washington State Department of Health
PO Box 47824
Olympia, WA 98504-7824
Phone: 360-236-3354
Email: Audrey.Coyne@doh.wa.gov
Shellfish Safety Web Page: www.doh.wa.gov/shellfishsafety.htm