Heartsaver First Aid Part I Progress Indicator: Question 3 of 22 3.  How much water should fire fighters be required to consume in rehabilitation for every SCBA tank used or consumed? p. 952 Choices: 16 ounces (473 milliliters) 8 ounces (237 milliliters) 24 ounces (710 milliliters) 12 ounces (355 milliliters)