A female security guard working at Pateluma Poultry Processors fell into an outdoor concrete tank containing waste from the plant. She managed to call 911 and hold onto the edge of the tank until firefighters were able to rescue her.

According to NBC News, the guard was attempting to adjust a metal grate that was improperly covering the tank when she fell in, earlier this morning. Without knowing how deep the waste was, she managed to call 911 on her cell phone after nobody responded to her initial cried for help.

"She was waist deep and sinking and didn't know how deep the tank was," said Ron Marsh, supervisor at the Sonoma County emergency communications and dispatch center, who told the woman to put her cellphone in her pocket and to hold onto the top of the tank with both arms. Firefighters were able to pull her out and take her to a nearby hospital as a precaution.

Petaluma Poultry Processors did not respond to the NBC story. The fire department has notified the state Division of Occupational Safety and Health about the incident.

Source: NBC News