A Sodium hypochlorite tank is full at 23,000 gallons. If the current level is at 1,200 gallons, how many gallons need to be added to reach 70% capacity?

To determine how many gallons need to be added to reach 70% capacity in the Sodium hypochlorite tank, first calculate what 70% of the total capacity is. The total capacity of the tank is 23,000 gallons.

70% of 23,000 gallons can be calculated as follows:

[ 0.70 \times 23,000 = 16,100 \text{ gallons} ]

Next, we need to find out how many additional gallons are required to go from the current level of 1,200 gallons to the target level of 16,100 gallons. This is done by subtracting the current volume from the target volume:

[ 16,100 - 1,200 = 14,900 \text{ gallons} ]

Thus, the correct amount that needs to be added to the sodium hypochlorite tank in order to reach 70% capacity is indeed 14,900 gallons.