These should be stored in a safe and organised way which allows them to be retrieved again safely. The way materials and equipment are stored should also be in line with Material Safety Data Sheets (MSDSs) and legislation where this applies. For example, legislation states that your workplace should only store the lowest practicable amounts of flammable and combustible materials (such as gas). In other words, no more than is necessary.
Ensure that you always report faulty equipment and hazards. Also keep your work area tidy and free from hazards such as loose electrical cords, buckets, rakes, etc.