Norfolk Southern says it has officially completed soil excavation at the derailment site in East Palestine over the weekend.
But is the work still far from over?
21 News spoke with an environmental expert, who questions the company's clean up efforts in that area since nearby creeks still show a rainbow sheen, nearly nine months later.

"If it's there because of us we are going to clean it up!" 
That's what a spokesperson from Norfolk Southern had to say Monday as the company announced an important milestone in the nine-month long effort to remove contaminated soil from the February 3rd derailment in East Palestine.

The last truckload of soil drove off site Monday marking what the EPA estimates has been a total of more than 171 thousand tons of solid waste shipped away.

Air monitoring will continue as well as water sampling from monitoring wells.

But it's the groundwater and creeks that's concerning a water expert from Kent State University.He says there just hasn't been enough data released yet to determine that.

"Unless we are seeing there is no groundwater contaminating plume developing that we won't be able to say for sure that this is going to be a clean site if there was a groundwater contaminate plume develop then it's going to be numerous years to be able to contain it, clean it up," said Dr. Kulpdeep Singh, of Kent State.

According to Norfolk Southern, their plan to clean the creeks are in front of the EPA for approval right now.

"We are going back to the creek we have sheen analysis, sediment analysis of that creek from negley all the way to sulfer run. We've already cleaned them once we're going to do another cleaning operation to remove any sediments from our last cleaning operation," said Bob Scoele of Northfolk Southern.

Trucks will begin to bring in clean soil to back fill the site soon.