At least two people should be available. Enter with a rope and safety harness so they can lift you out in case of an accident. Do not attempt a rescue in an oxygen-deficient atmosphere. Call your local emergency rescue team. They have the training and equipment to do the job safely.
Spoiled grain can release dust and mold spores into the air during handling.
If you are not careful, this can result in serious respiratory problems. Nuisance dust is light enough to be carried by air currents and small enough to be inhaled and deposited in your lungs. A common danger in the air, this dust can accumulate and turn parts of the lung into non-functioning, hardened tissue. Inhaled dust also encourages the growth of tuberculosis and bronchitis. To protect your lungs, wear an approved dust mask and ventilate the work area, while you clean out a grain bin or work with dusty grain.