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Potable Water Surveillance Flashcards

1
Q

What does FAC stand for?

A

Free Available Chlorine

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2
Q

What is the potable water surveillance afloat instruction?

A

NAVMED P-5010 Chapter 6

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3
Q

What is coaming?

A

Raised frame as around a hatchway in the deck of a ship

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4
Q

What is distillation?

A

Total process the distilling plant forms including evaporation and condensation

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5
Q

What is Free Available Chlorine

A

Chlorine available after demand is met

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6
Q

What is Point of Use

A

A treatment device applied to a single tap used for purpose of reducing contaminants in drinking water at that tap

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7
Q

What is reverse osmosis?

A

Reverse of natural osmosis achieved by external application of sufficient reverse pressure to cause the solvent to flow in an unnatural direction

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8
Q

what is colilert/colisure

A

used to detect total coliform and e-coli in potable water

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9
Q

what is total coliform

A

mostly harmless bacteria that live in soil and water as well as in guts of animals. the presence or absence of total coliform bacteria is the drinking water standard

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10
Q

what is e coli

A

a type of fecal coliform bacteria

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11
Q

who is responsible for shipboard potable water systems including treatment facilities

A

NAVSEASYSCOM

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12
Q

who is responsible for promulgating instructions for ship to shore potable water connections

A

NAVFACENGCOM

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13
Q

what is BUMED responsible for relating to potable water

A
  • establishing and promulgating health standards for water afloat
  • promulgate instructions, notices, or other publications to reflect afloat water quality recommendations
  • estbalish shipboard requirements for medical surveillance of potable water systems
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14
Q

who makes the water sanitation bill?

A

CO

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15
Q

what is engineering department responsible for relating to potable water

A
  • supply and treatment of potable water
  • ensuring all connections are made by authorized personnel
  • halogen and pH testing
  • ensuring minimum halogen residuals are maintained at a potable water tank before placing the tank online
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16
Q

medical responsibilities for potable water

A

BACTI testing
halogen testing
notify CO of discrepancies

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17
Q

how often is BACTI testing conducted

A

weekly

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18
Q

how often is halogen testing done by medical

A

daily

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19
Q

what is the minimum amount of water per person under normal conditions

A

50 gallons per day

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20
Q

what is the minimum amount of water per person while in water hours

A

2 gallons per day

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21
Q

what type of water is used for marine sanitation

A

sea water

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22
Q

what are the approved sources for potable water for naval ships

A
  • distillation, reverse osmosis, or other approved water production technology
  • shore to ship from an approved source
  • shore to ship from an unapproved source
  • ship to ship
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23
Q

when should you avoid making potable water

A
  • harbors or from polluted seawater
  • when ships are in close formation
  • when stripping or discharging waste or bilge water forward of saltwater intakes
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24
Q

who has to approve shore to ship public water supplies

A

EPA

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25
whose bases can we pull in to and accept their potable water
- british royal navy - canadian forces - royal australian navy
26
what is the minimum halogen residual for water from an unapproved source
2.0 ppm
27
what are the types of water distillation plants
steam distilling plants waste heat vapor compression type
28
what are the types of reverse osmosis plants
single pass | double pass
29
which requires further disinfection, single pass or triple pass reverse osmosis
single pass
30
who must approve potable water tank coatings
NSF/ANSI
31
what are the ways to measure water level in potable water tanks
automatic gauges petcocks sounding tubes
32
what must sounding tubes be labeled with
"POTABLE WATER USE ONLY"
33
what color symbolizes potable water
dark blue
34
how high must potable water lines be kept off of the deck
18 inches
35
what is the potable water temperature at the tap
120 degrees f
36
what is kept inside potable water lockers
instructions for disinfection of hoses and risers (water sanitation bill) -potable water hose
37
when should potable water hoses be removed from use
when cracks develop in the lining or leaks occur
38
describe labels on potable water hoses
1 inch high letters every 10 feet
39
what is the minimum halogen residual requirement for water with doubtful quality
2.0 ppm
40
what is the purpose of halogen residual testing
indicate potential contamination
41
what is the purpose of bacti testing
ensure fitness for human consumption | assess adequacy of disinfection process
42
halogenation is more effective at what temperature
higher temperature
43
what is the minimum halogen residual at distal ends of water distribution systems on larger ships
trace
44
how many bacti tests should be done with a crew of less than 400 people, 400-800 people, and 800 or more
<400: 4 400-800: 8 >800: 12
45
water samples will include how many of ship's ice machines and ship's potable water tanks
1/4
46
how often are emergency potable water tanks tested
monthly
47
what are the methods of bacti testing
colilert or colisure
48
what is the protocol if a bacti sample provides a negative test
3 repeat samples: one at the source, one up stream, one down stream
49
what are the two methods of halogen residual testing
DPD 1 and DPD 4
50
what is DPD 1 used to test for
FAC or TBR
51
what is DPD 4 used for
(chloramine) total chlorine residual
52
what is the accuracy of color comparator test
+/- 10 percent
53
what is the accuracy of portable spectrophotometer test
+/- 2 percent
54
continual absence of halogen residual in potable water system must be reported to who
CO with a copy to CHENG
55
what must bacti samples be labeled with
location, date and time of collection, and sampler's initials
56
what temperature are bacti samples incubated at
35 Celsius
57
list colilert abnormalities for positive samples
clear: negative yellow: positive for total coliform fluorescent yellow: positive for fecal coliform
58
list colisure abnormalities for positive samples
yellow: negative magenta: positive for total coliform fluorescent light blue: positive for e. coli
59
list sources of contamination of potable water
cross connection with non-potable systems leaks in common bulkheads or in non-potable piping through water tanks potable water hoses used for non-potable liquids excessive storage time of water in tanks deteriorate tank coatings potable water tanks used for non-potable water liquids
60
what are the approved methods for disinfecting shipboard potable water
chlorine and bromine
61
what are the different types of water disinfection methods
automatic chlorine disinfection, brominator, and manual chlorine disinfection
62
what is the least desirable method of water disinfection
manual chlorine disinfection
63
what is the disinfectant of choice in manual chlorine disinfection
calcium hypochlorite (HTH)
64
what is the chlorine dosage rule of thumb
one ounce of HTH per 5000 gallons of water equals 1.0 ppm FAC
65
what is the minimum FAC/TBR concentration for water from an approved water source
0.2 ppm after 30 minute contact time
66
what is the minimum FAC/TBR for water from an unapproved source
2.0 ppm after 30 minute contact time
67
how many methods are there to disinfect the potable water system
3
68
what is distinct about method 1 of potable water disinfection
10 ppm FAC throughout the tank for 24 hours
69
what is distinct about method 2 of potable water system disinfection
200 ppm FAC to all tank surfaces
70
what is distinct about method 3 of potable water system disinfection
5% of tank volume with 50 ppm FAC
71
what are the two methods of controlling taste and odor in potable water
steam method and chlorination method
72
what ppm of FAC for chlorination method
5.0 ppm at the tank, 2.0 ppm distributed
73
who must approve use of the steam method
NAVSEASYSCOM
74
what size bottle is HTH stored in
6 ounce bottles
75
how many day supply of HTH must be kept as ready use stock
7 days
76
how many bottles may be kept in store room stocks
48 bottles
77
how long must medical keep a log of water tests
2 years

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