LYNCHBURG, Va. -

One of three wrecked cars has been pulled from the James River after the Lynchburg train derailment.

Crews are carefully working to remove the remaining two.

The National Transportation Safety Board held another press conference Friday.

Their team has documented the crash scene and the train itself.

They haven't found anything in the way the crew operated the train that would have caused the derailment.

The train cars had also been inspected before the accident and there were no noticeable defects.

The "fact finding" will go on for another five or six days, before the NTSB heads back to Washington.

While the investigation continues, the derailment is attracting attention from environmentalists about the country, who want to learn more about the effect this incident is having on our water supply.

From the banks of the James River, there doesn't appear to be anything wrong with the water.

Scientist Scott Smith went out on a boat to get a closer look.

"Everyone is connected by water. We are here to help diagnose the problem, so we can work with people in a collaborative way to help solve the problem,” Smith said.

Smith is a scientist with "Water Defense," a non-profit that tests the effects of fossil fuels on local water supplies.

After hearing about Lynchburg's train derailment, Smith traveled from New York to get a sample.

He's trying to look beyond the surface of the water, to see the full extent of what's in the river.

"Taking samples just from the surface doesn't make a lot of sense, especially in today's society where we have all this great technology,” Smith said.

Smith's organization has a motive.

The group actively fights against the mining and drilling of fossil fuels, like crude oil, and sampling our water is a way to advance their cause.

They're also trying to call attention to what they call the dangers of oil transportation.

The type of cars involved in Wednesday's wreck have been involved in serious accidents across the country.

"Our greatest concern is to learn from this, so that we can work together with the entire country to prevent any future loss of life or any future explosions,” Smith said.

The department of environmental quality is doing its own testing of the water.

So far the water has tested normally and it's considered safe to drink.

Additional protective beams were put in the water today around the wrecked cars, to prevent any additional oil from getting in the river during the clean-up process.