This power station cooling water chlorine dosing system is a serious, and potentially fatal accident waiting to happen. The chlorine in these one-ton cylinders is under pressure. A leak from a one-ton cylinder of chlorine can produce a lethal gas cloud for 5 miles down wind (15 mph breeze). The connection to a garden hose was attached with a coat hanger wire. This is inappropriate attachment to a pressurized gas cylinder, and inappropriate hose material for chlorine. There is no gas pressure regulator on the system, only a valve, inappropriate for regulation of (lethal) gas under pressure. The arrangement replaced a proper chlorine dosing system originally installed in the power station, that was allowed to fall into ruin. This inappropriate chlorine handling system is quite common in the developing world. In addition, loss control and health and safety provisions should include: personnel protective equipment, so that a leak can be handled safely, leak stemming gear, so that an ongoing leak can be repaired or stopped. The facility should have a disaster contingency plan, so that site personnel and the surrounding community will know what to do to save themselves in case of a chlorine spill. In projects we've been involved with, the above loss control and safety precautions have been instituted, health and safety organizations have been formed within the companies, and personnel training in hazardous materials management has been instituted. Note: technically chlorine is classified as an irritant; but we think this covers up the lethal nature of the hazard