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PREVMED#2 > Manage Portable Water Surveillance > Flashcards

Manage Portable Water Surveillance Flashcards

1
Q

definition of coaming

A

a raised from (as around a hatchway in the deck of a ship) to keep out water.

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2
Q

definition of distillation

A

the total process the distilling plant forms, including evaporation and condensation

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3
Q

definition of Free Available Chlorine

A

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

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4
Q

definition of micron

A

a unit of length. one millionth of a meter

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5
Q

definition of Point of Use (POU)

A

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

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6
Q

definition of potable water

A

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

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7
Q

definition of reverse osmosis

A

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

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8
Q

definition of Colilert/ Colisure

A

test used to detect total coliform and E coli in the portable water

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9
Q

total coliform

A

are a group of closely related, mostly harmless bacteria that live in soil and water as well as the guts of animals. The extent to which total coliforms are present in the water source can indicate the general quality of the water and the likelihood that the water is contaminated with fecal matter. The presence of absence of total coliform bacteria is the drinking water standard.

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10
Q

definition of E Coli

A

a type of fecal coliform bacteria commonly found in the intestines of animals and humans. E coli is short for Escherichia coli. The presence of E. coli in water is a strong indication of recent sewage or animal waste contamination. Sewage may contain many types of disease causing organisms.

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11
Q

command responsibilities for potable water afloat: Naval Sea Systems Command (NAVSEASYSCOM)

A

responsible for the shipboard potable water systems, including treatment facilities and processes to assure that safe drinking water is available at all times.

Design
Construction
Maintenance

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12
Q

command responsibilities for potable water afloat: Naval Facilities Engineering Command (NAVFACENGCOM)

A

responsible for promulgating instructions for ship to shore potable water connections and for providing potable water from an approves source when the ship is berthed at a naval facility.

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13
Q

command responsibilities for potable water afloat: Chief, BUMED

A

a) responsible for establishing and promulgating health standards for water quality afloat
b) promulgate appropriate instructions, notices, or other publications to reflect afloat water quality requirements
c) establish the shipboard requirements for medical surveillance of potable water systems

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14
Q

command elements responsible for portable water afloat: Area, Fleet and subordinate commanders

A

responsible for issuing the necessary implementing directives to ensure that adequate water sanitation standards are provided and enforced in each ship within the command

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15
Q

command elements responsible for portable water afloat: commanding officers

A

responsible for promulgating a water sanitation bill to ensure that procedures for receipt, transfer, treatment, storage, distribution, and surveillance are provided and followed.

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16
Q

command elements responsible for portable water afloat: engineering department

A

responsible for the commanding officer for implementing the requirements of the NAVSEASYSCOM.

1) supply and treatment of potable water
2) potable water system components
3) f ensure that all connections are made only by authorized personnel
4) halogen and pH testing
5) ensure minimum halogen residuals

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17
Q

engineering department are responsible for potable water systems that:

A 
receive 
store
distribute 
produce 
treat
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18
Q

command elements responsible for portable water afloat: MDR

A

medical surveillance
1) bacteriological testing (BACTI)
2) Daily Halogen Testing
MDR shall notify the commanding officer of any discrepancies observed in the potable water distribution system.

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19
Q

for new ship construction, how many gallons per man day is specified by NAVSEASYSCOM for design considerations

A

50

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20
Q

minimum usage requirements of potable water to not apply to what:

A

“Water Hours”

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21
Q

what are “water hours” criteria

A

not less than 2 gallons per man per day

particularly applicable to troop carrying ships loaded beyond capacity

sea water is used for marine sanitation device systems

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22
Q

approved sources of potable water for naval ships

A

1) distillation, reverse osmosis, or other NAVSEA producing tech
2) shore to ship delivery form approved source
3) shore to ship delivery from unapproved source
4) ship to ship
5) seawater is used aboard ships such as in the fire mains, decontamination, and for marine sanitation devices (MSDs) flushing.

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23
Q

Shore to Ship delivery from an unapproved source parameters

A

treated to 2.0 ppm prior to receipt

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24
Q

types of water production plants found aboard navy vessels

A

distillation plants

reverse osmosis

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25
Q

types of distillation plants

A

steam distilling plants
waste heat distilling plant
vapor compression type

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26
Q

steam distilling plants use steam supplied by what

A

power plant or auxiliary boiler

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27
Q

waste heat distilling plant uses heat derived from what

A

diesel engine jacket water

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28
Q

vapor compression type uses what kind of energy

A

electrical energy

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29
Q

Reverse osmosis can be be either single pass or:

A

triple pass

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30
Q

Reverse osmosis removes suspended particles as small as how many microns?

A

1 micron

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31
Q

for single pass RO plants, what kind of additional disinfection is needed

A

chlorination or bromination

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32
Q

triple pass RO plants required additional disinfection:

A

none is required.

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33
Q

what is the PSI of the water where it is introduced to the RO membranes

A

1000 psi

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34
Q

describe a potable water tank

A

coating is NSF/ANSI standard
carefully monitoring
should never be filled with ballast water (except emergency)

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35
Q

characteristics of vents and overflow lines

A

located to reduce accidental contamination

screened with 18 g or finer non corrosive mesh

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36
Q

what are the unauthorized termination points for vents and overflow lines

A 
food service spaces 
medical spaces 
toilets 
electrical or electronic rooms 
exterior of the ship
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37
Q

characteristics of manholes

A

construction and location should minimize contamination

if top of tank is also deck, 1/2” curb above deck.

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38
Q

characteristics of manholes

A

construction and location should minimize contamination

if top of tank is also deck, 1/2” curb above deck.

if on side of tank, flush mount okay

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39
Q

types of water level measurement

A

automatic level gauges
petcock
sounding tubes

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40
Q

two ways of measuring with a sounding tube

A

sounding rod, that remains in the tube

steel tape that needs disinfection

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41
Q

how much ppm FAC and for how long do you disinfect steel tape for sounding tube measurements

A

100 ppm FAC for 2 minutes.

42
Q

how must sounding tubes be labeled

A

“POTABLE WATER USE ONLY”

43
Q

Filling connections (hose valve, Riser) characteristics.

A

clearly labeled

dark blue

18in from deck

turned facing downward

screw caps with keeper chains

44
Q

potable water filling lines which distribute potable water to non potable water tanks must have what

A

an air gap or backflow prevention device.

45
Q

potable water piping passing through non potable water tanks must have what

A

the pipe be surrounded by a sloped self draining pipe tunnel

46
Q

what temperature is the potable water hot water set to at the fixture

A

120 degrees F

47
Q

requirements for potable water hose lockers

A

vermin proof
locked
18 inches off the deck
printed disinfection instructions.

48
Q

requirements of the potable water hose sanitation.

A

examined routinely
removed when cracks form
capped or coupled when not in use

49
Q

labeling requirements for hoses

A

“POTABLE WATER ONLY”

1 inch high letters, every 10 ft

50
Q

valves for risers

A

“POTABLE WATER ONLY”

in 1/4 in letters. must be colored blue.

51
Q

labeling requirements for sounding tubes

A

ID plate

cap will be dark blue

52
Q

labeling requirements for potable water hose lockers

A

“POTABLE WATER HOSE”

53
Q

how long should you flush pier side potable water

A

15-30 seconds

54
Q

cleaning procedures for outlet and rinse fitting for ship to shore procedures

A

solution containing 100 ppm FAC, 2 min

55
Q

purpose of halogen residual (chlorine/bromine) potable water testing

A

quick indication of water that may have been improperly treated or handled

56
Q

wat does absence of halogen in the ships potable water indicate

A

contamination

57
Q

two purposes of bacteriological testing

A

ensure fitness for human consumption and to assess adequacy of disinfection process.

58
Q

why are Naval vessels exempt from chemical analysis

A

chemical analysis is complex. if assistance is required notify nearest NEPMU

59
Q

who checks the temperature and pH of the potable water

A

engineering dept. halogenation is more effective at warm temperatures

60
Q

why is salinity not tested on halogenated water

A

false results

61
Q

how much halogen residual of FAC and TABR must surface ships maintain in the potable water system after initial treatment

A

.2 ppm FAC or TABR

62
Q

if water is received from a doubtful quality, halogen residual at point of consumption must be a minimum of what ppm FAC?

A

2 ppm FAC

63
Q

how often is halogen residual checked by MDR?

A

daily
in conjunction with bacterial analysis
prior to receipt of potable water

64
Q

who is responsible for checking the halogen level of the potable water tanks after a 30 min contact time

A

engineering dept

65
Q

who do we follow for established Maximum Container Level (/MCL) for coliform bacteria?

A

EPA established MCL

66
Q

what is the frequency of Micro monitoring

A

weekly according to a written plan

67
Q

what is the number of weekly site samples for micro?

A

population dependent.

<400 personnel, 4
400-800 personnel, 8
>800 personnel, 12

68
Q

what is included in the bacterial monitoring that is done weekly

A

1/4 of ice machines, 1/4 of the water tanks

69
Q

two approved methods of bacteria testing

A

colilert and Colisure

70
Q

if a positive bacterial monitoring result, how many samples must be repeated?

A

3.

one at original connection, upstream, and downstream, no more than 5 connections either way

71
Q

within how many hours will you collect repeats after a positive sample

A

24 hrs

72
Q

what does DPD#1 test for

A

FAC or TBR

73
Q

what does DPD #4 test for

A

total chlorine residual

74
Q

accuracy of the Color comparator

A

(+) or (-) 10 percent

75
Q

accuracy of the Portable Spectronphotometer

A

(+) or (-) 2 percent

76
Q

what goes on the sample bottle or bag for bacteriological testing

A

location

date and time

samplers initials

77
Q

how long does the bacteria samples incubate?

A

24 hrs at 35 C

78
Q

reading results for colilert test

A

clear is negative
yellow is + for coliform
fluorescent (under UV) is + for fecal coliform

79
Q

reading results f or colisure

A

yellow is negative
magenta is positive for total coliforms
fluorescent light blue is positive for E coli

80
Q

where should you record results of the bacteriological testing

A

record result in the potable water log and/or TMIP including the positive and negative controls

81
Q

what are the methods of disinfecting water

A

in-line chlorinators
brominator
recirculation brominator
batch method

82
Q

in line (proportioning) brominator ppm delivery

A

.7 ppm bromine during nomal ops

can deliver 2.0 ppm when needed

83
Q

what is the chlorine dosage rule of thumb for batch method

A

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

84
Q

halogen residuals from approve source

A

.2 ppm FAC/BTR after 30 min

85
Q

halogen residual from unapproved source

A

2.0 ppm FAC/TBR after 30 min contact time

86
Q

if the ships brominator cannot achieve a TBR of 2.0 ppm the water must be chlorinated by what method

A

“Batch Method”

87
Q

two methods to try to identify source and odor problem of water

A

chlorination method

steam method

88
Q

what is the chlorination method of water for fixing taste and odor problems

A

1) chlorinate to 5.0 FAC

2) distribute at 2.0 PPM FAC

89
Q

what is the steam method of fixing odor and taste problems

A

need NAVSEASYSCOM approval

boil the water for one minute to see if it works.

90
Q

sequence of events when requesting outside help

A

contact NEPMU via TYCOM Medical Officer

if problem involves tank coatings, or cant be resolved notify NAVSEASYCOM via chain.
a) includes Naval Sea Support Center (NAVSEACEN) or In Service Engineering Agent (ISEA)

91
Q

how many holes are in the metal box that holds Calcium Hypochlorite (HTH) 65%-70% for ready use stock

A

three 1/4 inch holes drilled in the bottom to allow release of chlorine gas

92
Q

how much HTH supply shall be maintained in ready use stock

A

no more than 7 day supply

93
Q

ideal storage space for HTH ready use stock

A

engineering office space

94
Q

areas where ready use stock HTH box must NOT be installed

A 
machinery space 
flammable liquid storeroom 
berthing 
paint storeroom 
oil and water test labs
95
Q

some rules for storeroom stocks of HTH

A

located where temp will not exceed 100.

not adjacent to a magazine

5 feet away from any heat source or surface that exceeds 140 degrees F

96
Q

no more than how many 6 ounce bottles in storeroom stocks

A

48

97
Q

chapter of the NSTM that deals with bromine storage lockers

A

Chapter 533

98
Q

shelf life of bromine cartridges

A

2 years from the date of manufacturer

99
Q

how long does MDR maintain chronological record of potable water surveillance

A

2 years

100
Q

disinfection methods 1 for potable water system afloat

A

fill tank

add chlorine to achieve 10ppm FAC, hold for 24 hrs.

refill

perform bacti

101
Q

disinfection method two for potable water systems afloat

A

apply 200 ppm FAC to all surfaces

flush pipes with 10 ppm FAC

refill

perform bacti

102
Q

method 3 of disinfecting potable watery systems afloat

A 
fill 5% of tank with 50ppm FAC 
hold 6 hours. 
add potable water till full and hold 24 hrs. 
drain, refill 
perform bacti

PREVMED#2 (7 decks)

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