SOUTH SIOUX CITY, Neb. (AP) — South Sioux City residents forced to leave their homes by a horrible odor say they’re concerned a resident was recently sent back to his home before hydrogen sulfide gas levels were deemed safe by Nebraska standards.

Chris Cornell was displaced from his home Oct. 28 due to the odor from the nearby Big Ox Energy plant. City administrator Lance Hedquist told Cornell he could return to his home last week. Cornell says he was shocked.

Gas levels should be lower than 7.17 parts per billion before residents can safely return to their homes. The first batch of test results hadn’t been processed at the time of Hedquist’s call. Hedquist says he thought the home was safe based on discussion with other people working on the home.

The city has resumed paying for Cornell’s hotel accommodations.