P-5010 CH-6, WATER AFLOAT Flashcards
Standards for water afloat?
CHBUMED
NSTMs
531
533
Drinking water NSF/ANSI standard?
60
Potable water risers how far off deck?
18”
Steps for ship to shore connection
5
3 Types of distillation plants?
Steam
Waste heat
Vapor compression
Max shower water temp
120 F
“potable water only” ever ten feet of hose, how high are the letters?
1/4”
** Not less than ____ FAC after 30 minute contact time? **
** 0.2 ppm **
Mechanical treatment is preferred to
Batch treatment
HTH has what percent available chlorine?
65-70% (6oz bottle)
only 5.25 in Sodium Hypochlorite i.e. household bleach
HTH storage?
7 day ready use supply
No more than 48 6oz bottles stowed at any locker/bin
Color for label “Hazardous material, calcium hypochlorite”
Red letters
White background
Bromine shelf life?
2 yrs
Two types of brominators?
In Line
Recirc
Batch treatment?
1oz HTH added to 5,000 gallons = 1ppm inital chlorine concentration
Tanks should achieve 0.2ppm FAC for what contact time?
30min
Inspect HTH bottles how often?
Q 3 months and prior to deployment
Shore supply is tested for _____ daily
Halogen
Bacteriological testing 1/4 of ice machines how often?
Weekly
DPD - Diethyl-p-phenylene tests what?
Chlorine/bromine residuals
DPD accuracy
Within 10%
Spectophotphotometric accuracy?
+2 %
Calcium hypochlorite introduces clear fluid when tank is how full
1/4
Sodium hypochlorite does not require what?
mixing, dilution required
Procedures for positive coliform sample?
Repeat sample from same tap
2 other samples from w/in 5 service connections (one up/one down stream)
Gallons of water per person per day?
12 – 35 gallons
three ¼ inch vented holes at bottom of box when storing?
Calcium Hypochlorite
“Butterworthing” is a term used for?
Mechanical cleaning
Superchlorination
- Chlorinate tank water level to 100 ppm FAC
- Water must be tested hourly for a total of four hours
- If ppm drops below 50 ppm FAC, restart entire process
Emergency Potable Water Tanks
- Must be drained & refilled quarterly (every 3 months)
- Must be open & inspected for sludge / foreign matter every three years
- Bacteriological analysis from tanks performed monthly
Water Log = Maintained by medical for how long?
two years
