An investigation into a mysterious odor that sent 23 students and staff to the hospital and caused Graham Mesa Elementary School in Rifle to be evacuated Thursday has been inconclusive.
On Friday, Walsh Environmental began an analysis of the building, evaluating mechanical systems and testing the air quality.
“Their final report is expected at the end of this week,” said Garfield Re-2 School District spokesperson Theresa Hamilton. The school will remain closed until more is known, she said.
Starting Wednesday, students will attend other elementary schools in the Rifle area.
After an unknown odor sickened students and teachers in a fourth-grade classroom Sept. 1, the Rifle Fire Department evacuated the building.
One teacher and 22 students were taken to area hospitals where they were treated for dizziness and difficulty breathing.
