75 ft x 20 ft x 10 ft = 15,000 cu ft
15,000 cu ft x 7.48 gal/cu ft = 112,200 gal
8 feet x 8 feet x 32 feet x .785 = 1,607.68 cu ft
1607.68 cu ft x 7.48 gallons per cu ft = 12,025 gallons
12,025 gallons x 0.90 = 10,823 gallons
10,823 gallons / 24 gpm = 451 minutes
451 minutes = 7 hours 31 minutes
After installation and pressure testing, new water mains must be disinfected to eliminate any harmful microorganisms. Filling the main with a chlorine solution at a concentration of 25 to 50 parts per million (ppm) allows for effective disinfection. The recommended duration of at least 24 hours ensures that the chlorine has sufficient time to contact and kill bacteria before the system is flushed and returned to service.
The Safe Drinking Water Act mandates that water purveyors are responsible for providing safe drinking water up to the point of delivery, which is the consumer's tap. This means that once the water reaches the consumer's premises, the responsibility for maintaining water quality and safety within the plumbing system falls to the homeowner. It emphasizes the importance of ensuring that the water supply is safe and meets regulatory standards at the point of delivery.
When entering confined spaces, the most critical safety concerns are the levels of oxygen and the presence of hazardous gases. Oxygen deficiency can lead to asphyxiation, while hazardous gases (such as carbon monoxide, hydrogen sulfide, or methane) can be toxic or explosive. Proper safety protocols, including air monitoring and ventilation, are essential to protect workers in these environments.
