• https://www.hach.com/free-total-chlorine-test-strips-0-10-mg- l/product?id=7640211603&callback=pf
Note there are 50 tests per bottle.
• Work backwards to determine how long it will take to flush buildings and to staff properly
• All fixtures that may be used for consumption (drinking, eating, food prep) and bathing (showers, tubs, etc) need to be flushed until either • A free chlorine residual of 0.5 ppm has been achieved for potable cold water • OR • The water temperature at the location is consistent with delivery temperature of hot water (e.g. if hot water is made at 140 F and delivered at 120 F the water at the tap should be 120 F +/- 2 degrees F.
• The flushing process needs to be documented with: • Date/Time of flushing •
Final water quality (either free chlorine or temperature)
• It is unreasonable to flush a large building in a few hours. In order to have enough time it is a helpful exercise to do an estimate of time per floor/building.
Tasks - start faucets/fixtures, test, record Time (min per system
Total Estimated Time
Building A
Time (min per system
Number of floors
6
Number of bathrooms per floor Number of sinks per floor other than bathrooms Number of drinking water fountains per floor Number of drinking fountains with filters (30 minutes per filter change and flush) Number of kitchens (total) (2 filters)
3
10
30
4
5
20
4
4
30
120
1
30
30
Number of showers per floor
10
5
50
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