Over the last two years, more than 200 samples have been taken at the site.
Three samples were taken between May 15 and 21, at different times of day.
The samples were taken at different times of the year.
When I did, another one just reached around and took a sample.
"All I need to do is take a small sample of your blood."
He took a sample of her blood, then left, saying that he'd have results for them in two hours.
They will be taking samples of rock at around 3,000 feet.
There's no way we can take samples now, and that was the main reason for coming out here.
As part of the investigation, health workers have been taking samples.
No wonder they didn't want me taking samples out there.