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SF IDC > UNIT 6-13 POTABLE WATER SURVEILLANCE > Flashcards

UNIT 6-13 POTABLE WATER SURVEILLANCE Flashcards

1
Q

NAVMED P 5010- 6

A

WATER SUPPLY AFLOAT

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2
Q

RAISED FRAME TO KEEP WATER OUT

around a hatchway in the deck of a ship

A

coaming

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3
Q

process of distilling plant forms, including evaporation and condensation

A

distillation

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4
Q

chlorine available in the forms of hypochlorous acid and hypochlorite ions
(after demand is met)

A

Free Available Chlorine

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5
Q

one millionth of a meter

A

micron

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6
Q

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

A

Point of Use (POU)

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7
Q

water suitable for human consumption, bathing, laundry, personal hygiene

A

potable water

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8
Q

achieved by external application of sufficient reverse pressure to cause the solvent to flow in its unnatural direction

A

Reverse Osmisis

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9
Q

test used to detect total coliform and E-coli in potable water

A

colilert. Colisure

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10
Q

group of closely related, mostly harmless bacteria that live in soil and water as well as animal guts.

indicate general quality of water and likelihood that water is contaminated with fecal matter

presence or absence of bacteria is the drinking water standard

A

Total Coliform

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11
Q

fecal coliform bacteria commonly found in intestines’

strong indication of recent sewage or waste contamination

A

Escherichia Coli (E. Coli)

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12
Q

responsibilities of Naval Sea Systems command

A

design
construction
maintenance

related to shipboard potable water systems, including treatment facilities and processes to assure safe drinking water

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13
Q

responsibilities of Naval Facilities Command (NAVFACENGCOM)

A

promulgating instructions for SHIP TO SHORE potable water connections

providing potable water from approved source when BERTHED AT A NAVAL FACILITY

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14
Q

**presence or absence of total coliform bacteria is ____

A

**drinking water standard **

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15
Q

responsibilities of BUMED

A
  • establishing health standards
  • instructions, notices, and publications for afloat water quality requirements
  • shipboard requirements for medical surveillance of potable water systems
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16
Q

responsibilities of area, fleet, and subordinate commanders

A

water sanitation standards are provided and enforced in each ship w/in command

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17
Q

responsibilities of Engineering Dept.

A

responsible to CO for implementing requirements of NAVSEASYSCOM

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18
Q

responsibilities of MDR

A

conducting a medical surveillance program of the potable water system

Bacteriological Testing

Daily halogen testing

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19
Q

how many gallons per day is authorized by NAVSEASYSCOM for design considerations

A

50 gal/day per person

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20
Q

what does water hours mean

A

not less than 2 gallons per man a day

particularly when troop-carrying shjps loaded beyond capacity

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21
Q

what type of water is used for marine sanitation device system

A

sea water

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22
Q

three conditions to avoid making water while operating in

A

harbors or polluted seawater

ships in close formation

stripping or discharging waste or bilge water forward of the saltwater intakes

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23
Q

shore to ship delivery from unapproved source if treated at what minimum PPM prior to receipt

A

2.0 PPM

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24
Q

what is sea water used aboard ships for

A

fire mains
decontamination
marine sanitation devices

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25
Q

2 types of potable water plants

A

distilled and reverse osmosis

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26
Q

3 types of distillation plants

A

steam
waste heat
vapor compression

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27
Q

distillation plant that uses diesel engine jacket water

A

waste heat distilling plant

28
Q

distillation plant that uses electrical energy

A

vapor compression

29
Q

2 types of reverse osmosis

A

single and triple pass

30
Q

reverse osmosis plant that requires additional disinfection such as bromine and chlorine

A

single pass

31
Q

reverse osmosis plant that is often better than distilled water and does NOT REQUIRE additional disinfection

A

triple pass

32
Q

potable water tanks should never be filled with

A

ballast water

33
Q

PW hoses are labeled with

A

“POTABLE WATER ONLY” with 1 inch high letters every 10 feet

34
Q

how are PW valves receiving or supplying potable water (risers) labeled

A

“POTABLE WATER ONLY” 1/4 inch high letters

35
Q

how are sounding tubes labeled

A

clearly with ID plate

cap will be dark blue

36
Q

what is the standards for halogen residuals

A

0.2 -2.0 ppm

37
Q

who must supervise the connection between shore and ship

A

authorized shore station personnel or properly trained ship personnel

38
Q

what is the minimum required ppm for water with doubtful quality

A

2.0 ppm

39
Q

** state the purpose of bacteriological testing*

TG pg 636

A

ensure fitness for human consumption

assess adequacy of disinfection process

40
Q

halogenation is more effective at what water temperatures

A

warmer

41
Q

air craft carriers are allowed to maintain at least what level of chlorine in distal ends of distribution system

A

trace levels

42
Q

how often is hallogen residual testing conducted and by who

A

daily

MDR

43
Q

who is resposible for testing the halogen level of the potable water tanks after 3o minute contact time

A

engineering dept

44
Q

what does MCL stand for

A

Maximum containment level

45
Q

weekly bacteriological samples per personnel
400 and less
400-800
800 or more

A

4
8
12

46
Q

samples of microbiological quality will include what portion of ice machines and potable water tanks

A

1/4

47
Q

hw often are ships emergency potable water tanks tested bacteriologically

A

monthly

48
Q

when a positive bacteriological test is received, what is the process

A

require 3 repeat samples
original service connection source
one upstream (no more than 5 service connections)
one downstream (no more than 5 service connections)
collect withing 24 hours

49
Q

halogen that tests for FAC or Total Bromine Residual (TBR)

A

DPD #1

50
Q

halogen that tests for chloramines (total chlorine) residual

A

DPD#4

51
Q

what is the accuracy of the color comparator

A

+ or - 10%

52
Q

what is the accuracy of portable spectrophotometer

A

+ or - 2%

53
Q

continual absence of halogen residuals in potable water systems must be reported to who

A

CO

Copy to Chief engineer

54
Q

how often is bacteriological testing conducted

A

weekly

55
Q

how are bacteriological samples labeled

how much per bottle/bag sample?

incubate for how long? temp?

A

location
date and time
samplers initials

100ML

24 hours at 35*C

56
Q

what does HTH stand for

A

calcium hypochlorite

57
Q

for manual chlorination (batch method), what is the mixing strength of HTH

A

1 ounce of HTH per 5,000 gallons of water =1.0 ppm FAC

58
Q

how many methods to disinfect the potable water system

A

3

59
Q

describe “method 1” of disinfecting potable water tanks

A 
fill tank t over flow level
ADD CHLORINE TO 10PPM FAC THROUGH TANK
hold for 24 hours
drain tank
refill with potable water w/ required halogen residual level
bacteriological test
negative then use
60
Q

describe “method 2” of disinfecting potable water tanks

A
  • SPRAT/APPLY DIRECTLY 200PPM FAC TO ALL TANK SURFACES
  • flush inlet/outlet pipes w/ 10ppm FAC
  • disinfected surfaces shall remain in contact w/ chlorine solution for a minimum of 30 minutes
  • refill w/ potable water w/ required halogen residual level
  • negative test use water
61
Q

describe “method 3” of disinfecting potable water tanks

A

FILL 5% TANK VOLUME W/ 50PPM FAC SOLUTION
hold solution for 6 hours
add potable water to chlorine solution to fill tank; hold for 24 hours
drain tank
refill tank w/ potable water w/ required halogen residual level
bacteriological test
negative use water

62
Q

what are the 2 methods for controlling and identifying the source of taste and odor issues

A

chlorination and steam methods

63
Q

describe chlorination method for taste/odor issues

A

chlorinate to 5ppm FAC

distribute @ 2 ppm FAC

64
Q

describe the steam method for taste/odor issues

A

requires NAVDEASYSCOM approval
boil sample water for 1 minute to ensure proper effect
if resolved then steam may be feasible
not resolved then steam wont work

65
Q

Calcium Hypochlorite should not be stored in more than how many of what ounce bottles in any individual locker or bin?

A

48 six ounce bottles

SF IDC (39 decks)

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