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IDC Unit 6 > 6.13 Manage Potable Water Surveillance > Flashcards

6.13 Manage Potable Water Surveillance Flashcards

1
Q

Coaming?

A

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

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2
Q

Distillation?

A

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

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3
Q

Free Available Chlorine (FAC)?

A

Chlorine available (after demand is met) in the forms of Hypochlorous acid and Hypochlorite ions.

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4
Q

Micron?

A

A unit of length. One millionth of a meter.

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5
Q

Point of Use (POU)?

A

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

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6
Q

Potable Water?

A

Water that is suitable for human consumption, bathing, laundry, personal hygiene.

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7
Q

Reverse Osmosis (RO)?

A

The reverse 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

Colilert / Colisure?

A

Test used to detect total coliform and E-coli in the potable 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.

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10
Q

The extent to which total coliforms are present in the source water can indicate the general quality of what?

A

That water and the likelihood that the water is contaminated with fecal matter.

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11
Q

The presence or absence of total coliform bacteria is what?

A

The drinking water standard.

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12
Q

E. Coli?

A

A type of fecal coliform bacteria commonly found in the intestines of animals and humans.

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13
Q

What is E. coli short for?

A

Escherichia coli.

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14
Q

The presence of E. coli in water is a strong indication of what?

A

Recent sewage or animal waste contamination.

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15
Q

Sewage may contain many types of what?

A

Disease-causing organisms.

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16
Q

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

A

Naval Sea Systems Command (NAVSEASYSCOM)

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17
Q

NAVSEASYSCOM is responsible for what aspects of the potable water system?

A

Design,

Construction,

Maintenance.

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18
Q

Who is responsible for promulgating instructions for ship-to-shore potable water connections and for providing potable water from an approved source when the ship is berthed at a naval facility?

A

Naval Facilities Engineering Command (NAVFACENGCOM).

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19
Q

Who is responsible for establishing and promulgating health standards for water quality afloat to include:

Instructions, notices, or other publications, and a shipboard potable water medical surveillance?

A

Chief, BUMED.

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20
Q

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

A

Area, Fleet and subordinate commanders.

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21
Q

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

A

Commanding Officers.

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22
Q

Who is responsible to the commanding officer for implementing the requirements of the NAVSEASYSCOM?

A

Engineering Department.

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23
Q

What is the engineering department responsible for?

A

Supply and treatment of Potable water,

Potable water system components,

Ensure that all ship-to-shore and ship-to-ship connections are made only by authorized personnel.

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24
Q

Who is responsible for halogen and PH testing?

A

The engineering department.

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25
Q

Ensure minimum halogen residuals are maintained at a potable water tank before placing the tank on-line to what?

A

The potable water distribution system.

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26
Q

What are the components of the potable water system?

A

Receive,

Store,

Distribute,

Produce,

Treat.

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27
Q

Who is responsible for conducting the medical surveillance program of the potable water system?

A

Medical Department Representative (MDR) .

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28
Q

What does BACTI stand for?

A

Bacteriological Testing.

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29
Q

Who monitors the halogen levels?

A

MDR.

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30
Q

How often are halogen levels checked?

A

Daily.

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31
Q

Who will the MDR notify if there’s any discrepancies observed in the potable water distribution system?

A

Commanding Officer.

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32
Q

How many gallons of water does a person get during non water hours?

A

50 gallons.

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33
Q

For new ship construction, 50 gallons per man per day is specified by who?

A

NAVSEASYSCOM,

For design considerations.

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34
Q

How many gallons of water does a person get during “water hours?”

A

Not less than 2 gallons per man per day.

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35
Q

Seawater is used for what?

A

Marine sanitation device systems.

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36
Q

What are the approved water sources?

A

Distillation, Reverse Osmosis (RO),

Shore-to Ship delivery from an approved source,

Shore-to-Ship delivery from an unapproved source,

Ship-to-Ship,

Seawater.

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37
Q

What is Distillation, Reverse Osmosis (RO)?

A

Ship water treatment plants are capable of producing potable water from bacteriologically contaminated seawater.

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38
Q

Potable water must be adequately disinfected to maintain what?

A

The required halogen residual level in the potable water tanks and distribution system.

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39
Q

Avoid making water while operating where?

A

Harbors or from polluted seawater,

When ships are operated in close formation,

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

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40
Q

What agency approves Shore-to Ship delivery from an approved source?

A

Environmental Protection Agency (EPA) (state and territory) approved public water system.

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41
Q

Shore-to Ship Delivery Approved Source:

U.S Military sources including establishments under the cognizance of who?

A

British Royal Navy,

Canadian Forces,

Royal Australian Navy.

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42
Q

Shore-to Ship Delivery Approved Source:

Other OCONUS locations may be obtained from who?

A

U.S. Military representatives ashore or Navy Environmental Preventive Medicine Units (NEPMU) having area responsibility.

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43
Q

Shore-to-Ship delivery from an unapproved source is allowed to be received onboard if the water has been treated at a minimum of what?

A

2.0 ppm prior to receipt.

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44
Q

What is seawater on board a ship used for?

A

Fire mains,

Decontamination,

Marine sanitation devices (MSDs) flushing.

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45
Q

What are the two types of water production plants aboard a ship?

A

Distillation plants,

Reverse Osmosis (RO).

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46
Q

How many distillation plants are there?

A

Three general types,

Depending on the source of heat used to evaporate seawater.

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47
Q

What are the three distillation plants?

A

Steam Distilling Plants,

Waste Heat Distilling Plant,

Vapor Compression Type.

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48
Q

What is a steam distillation plant?

A

Uses steam supplied by power plant or auxiliary boiler.

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49
Q

What is a waste heat distilling plant?

A

Uses heat derived from diesel engine jacket water.

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50
Q

What is a vapor compression type plant?

A

Uses Electrical Energy.

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51
Q

Reverse Osmosis (RO) has how many passes?

A

Single or triple pass,

Removes suspended particles as small as 1 micron in some cases.

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52
Q

What percentage of water is made with reverse osmosis?

A

Typically 20-25 percent.

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53
Q

For single pass RO plants, what else is required for the water?

A

Additional disinfection such as chlorination or bromination is required.

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54
Q

For triple pass RO plants, what is not required for the water?

A

Disinfection,

The water quality is often better than distilled water.

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55
Q

Where are triple pass RO’s primarily located?

A

Submarines.

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56
Q

What are the shipboard water system components?

A

Potable Water Tank,

Vents and Overflows lines,

Manholes,

Water Level Measurement,

Filling Lines,

Piping.

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57
Q

What are the components of potable water tanks?

A

Necessary for maximizing space utilization,

Requires careful monitoring to prevent contamination,

Potable water tanks should never be filled with ballast water, unless for survival,

Potable Water tank coating.

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58
Q

What are the components of potable water tanks?

A

Necessary for maximizing space utilization,

Requires careful monitoring to prevent contamination,

Potable water tanks should never be filled with ballast water, unless for survival,

Potable Water tank coating.

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59
Q

Potable water tank coating is to what organization’s standard?

A

NSF/ANSI.

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60
Q

What are the components of the vents and overflows lines?

A

Located to reduce accidental contamination,

Openings screened with 18 gauge or finer, non-corrosive mesh,

Unauthorized termination points.

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61
Q

What are the unauthorized termination points?

A

Food Service Spaces,

Medical Spaces,

Toilets,

Electrical or electronic rooms,

Exterior of the ship.

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62
Q

What are the manholes?

A

Construction and location should minimize the possibility of contamination.

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63
Q

If the manhole is on top of the tank, it needs what?

A

1/2”curb or coaming above deck.

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64
Q

If the manhole is on the side of the tank, it needs what?

A

Flush mount.

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65
Q

What are the components of the water level measurement?

A

Automatic level gauges,

Direct read gauge,

Petcocks,

Valves at various intervals,

Sounding tubes,

Some carry a measuring rod,

Sounding rods will remain in the sounding tubes,

Others require a steel tape that requires disinfection prior to use,

100 ppm FAC for 2 minutes,

Must be labeled “POTABLE WATER USE ONLY”

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66
Q

What are the components of the filling connections (hose valve, risers)?

A

Clearly labeled,

Color coded dark blue, 🚩

18 inches from the deck, 🚩

Turned facing downward,

Screw caps with keeper chains.

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67
Q

Potable water lines/piping must never be cross connected to what?

A

Any non-potable piping or system.

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68
Q

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

A

An air gap or approved and appropriate backflow prevention device.

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69
Q

Potable water piping passing through non-potable water tanks must have the pipe surrounded by what?

A

A sloped self-draining pipe tunnel.

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70
Q

Potable hot water settings should be set so the temperature at the fixture is what?

A

120 degrees F at the water tap.

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71
Q

What are the components of a potable water hose lockers?

A

Vermin proof,

Locked,

18 inches off the deck (When located on weather decks and sponsons),

Printed, step by step instructions for disinfection of hoses and risers posted conspicuously inside the locker.

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72
Q

What are the components of a potable water hose?

A

Approved for potable water use,

Examined routinely,

Removed from use when cracks develop in the lining or leaks occur,

Capped or coupled and stored in hose locker when not in use,

Shall not be used for any other purpose.

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73
Q

How must hoses be labeled?

A

“POTABLE WATER ONLY,”

With 1 inch high letters every 10 feet.

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74
Q

What color must hoses be?

A

Couplings color-coded dark blue.

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75
Q

Valves for receiving or supplying potable water (risers) must be labeled with what?

A

Clearly labeled with warning plate,

“POTABLE WATER ONLY,”

In 1/4 inch high letters.

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76
Q

What color are the valves and valve handles?

A

Must be color-coded dark blue.

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77
Q

The sounding tubes must be labeled how?

A

Clearly labeled with ID plate.

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78
Q

Sounding tube cap will be color-coded what?

A

Dark blue.

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79
Q

How must potable water hose lockers be labeled?

A

“POTABLE WATER HOSE.”

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80
Q

When receiving or transferring water via approved source, proper procedures must be followed to prevent what?

A

Contamination.

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81
Q

What shall be tested prior to the initial transfer of water?

A

Halogen

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82
Q

If halogen residual is not within minimum standard of 0.2ppm, what has to be done?

A

The ship must boost halogen residual to the appropriate level.

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83
Q

Potable water connections between shore and ship must be made or supervised by who?

A

Authorized shore station personnel or properly trained ship personnel.

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84
Q

Engineering will notify who, prior to making the potable water hose connection?

A

MDR.

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85
Q

The MDR will test the Halogen residual and make recommendation to who?

A

The engineering department representative.

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86
Q

The potable water hose shall not be submerged in what?

A

Harbor water.

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87
Q

Potable water from sources of doubtful quality shall be what?

A

Investigated and examined thoroughly as possible,

Commanding Officer must be advised relative to the necessary procedures, safeguards, and disinfection.

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88
Q

The minimum halogen residual requirements for water with doubtful quality is what?

A

2.0 PPM.

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89
Q

Ship-to-Shore Procedures Water:

Remove shore cap and flush pier side potable water outlet for how long?

A

15-30 seconds.

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90
Q

Ship-to-Shore Procedures Water:

Immerse outlet and rinse fitting in solution containing 100-ppm FAC (free available chlorine) for how long?

A

At least 2 minutes.

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91
Q

Ship-to-Shore Procedures Water:

Flush water to waste for how long?

A

15-30 seconds.

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92
Q

Ship-to-Shore Procedures Water:

Deliver a clean disinfected potable water hose to the outlet just before what?

A

The connection is made (potable water hoses should be provided by the shore facility).

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93
Q

Ship-to-Shore Procedures Water:

Remove hose caps or uncouple hose ends and do what?

A

Disinfect if not previously disinfected.

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94
Q

Ship-to-Shore Procedures Water:

Connect hose to pier side outlet and do what?

A

Flush.

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95
Q

Ship-to-Shore Procedures Water:

Disinfect shipboard riser connections with what?

A

100-ppm FAC solution.

96
Q

Ship-to-Shore Procedures Water:

Connect hose to the potable water shipboard riser and deliver what?

A

Potable water.

97
Q

Ship-to-Shore Procedures Water:

Other FDA listed food contact surface disinfectants such as iodine may be used if approved by who?

A

The MDR.

98
Q

Ship-to-Shore Procedures Water:

When the transfer is completed, what needs to happen?

A

Secure the shore water source,

Remove the ship connection,

Then the shore connection.

99
Q

Ship-to-Shore Procedures Water:

Thoroughly flush what?

A

The potable water outlet and recap.

100
Q

Ship-to-Shore Procedures Water:

Drain the potable water hose thoroughly and properly store where?

A

In the potable water hose storage locker.

101
Q

Ship-to-Ship Procedures Water:

Both ships disinfect their what?

A

Respective potable water riser connections.

102
Q

Ship-to-Ship Procedures Water:

The leading potable water hose shall have the hose cap in place during what?

A

The high-line procedure.

103
Q

Ship-to-Ship Procedures Water:

When the receiving ship secures the potable water hose, the cap is removed and the hose coupling is what?

A

Disinfected.

104
Q

Ship-to-Ship Procedures Water:

The supplying ship connects its end and flushes the what?

A

Hose.

105
Q

Ship-to-Ship Procedures Water:

When the transfer is completed, the receiving ship removes the potable water hose and replaces the caps on the what?

A

Receiving connection and the potable water hose.

106
Q

Ship-to-Ship Procedures Water:

The supplying ship then does what?

A

Retrieves, couples or caps, and properly stores the potable water hose.

107
Q

What is the purpose of halogen residual (Chlorine/Bromine)?

A

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

108
Q

Absence of Halogen in the ship’s potable water may indicate what?

A

Contamination.

109
Q

What is the purpose of bacteriological testing?

A

Ensure fitness for human consumption,

To assess adequacy of disinfection process.

110
Q

Conform to the latest edition of “Standard Methods for the Examination of Water and Wastewater” published by who?

A

American Public Health Association (APHA),

American Water Works Association (AWWA),

Water Pollution Control Federation (WPCF).

111
Q

Chemical quality testing requirements?

A

Naval vessels are exempt,

Chemical analysis is complex,

If assistance is required, notify the nearest NEPMU.

112
Q

Temperature/pH of water is routinely performed by who?

A

Engineering Department.

113
Q

Halogenation is more effective when?

A

At warmer water temperatures.

114
Q

Chloride shall not exceed what?

A

0.065 Equivalent per Million (epm) or 2.3 ppm.

115
Q

Salinity testing must not be conducted on what?

A

Halogenated water,

Halogenated water will provide false results.

116
Q

Halogen Residual:

Surface ship must maintain a 0.2 ppm FAC or TABR in the potable water system after what?

A

Initial treatment.

117
Q

Halogen Residual:

Ships with large potable water distribution systems such as aircraft carriers shall maintain at least a trace level of chlorine where?

A

In the distal ends of the distribution systems.

118
Q

Halogen Residual:

If water is received from an unapproved source, a source of doubtful quality, the halogen residual at point of consumption shall be a minimum of what?

A

2.0 ppm FAC.

119
Q

Halogen Residual:

Routinely performed by who?

A

The MDR on a daily basis in conjunction with bacterial testing, prior to the receipt of potable water.

120
Q

Halogen Residual:

The Engineering Department is responsible for checking the Halogen level of the potable water tanks after how long?

A

30 minute contact time.

121
Q

Microbiological Quality:

What is the MCL (maximum contaminant level) for coliform bacteria?

A

Follow the EPA established Maximum Contaminant Level (MCL).

122
Q

Microbiological Quality:

What is the frequency of monitoring?

A

Performed weekly according to a written plan.

Shall represent sites through-out the distribution system,

Number of weekly samples is population dependent.

123
Q

Microbiological Quality:

400 personnel or less?

A

No less than 4 samples.

124
Q

Microbiological Quality:

Over 400 - 800 personnel?

A

Require 8 samples.

125
Q

Microbiological Quality:

More than 800?

A

Require 12 samples.

126
Q

Microbiological Quality:

What other samples are to be included?

A

1⁄4 of ship’s ice machines,

1⁄4 of the ship’s potable water tanks.

127
Q

Microbiological Quality:

Emergency Potable Water Tank will be tested how often?

A

Monthly.

128
Q

Microbiological Quality:

What are the approved methods for testing?

A

Any EPA approved method may be used,

Generally Colilert or Colisure is used by the fleet.

129
Q

Microbiological Quality:

Each positive sample will require what?

A

Three repeat samples.

130
Q

Microbiological Quality:

Where are the three repeat samples taken from?

A

Original service connection source,

One upstream (no more than 5 service connections),

One down stream (no more than 5 service connections).

131
Q

Microbiological Quality:

Collect repeat samples within how many hours?

A

24 hours of positive sample.

132
Q

Chlorine or bromine residuals are determined by using what test?

A

The DPD (diethyl-p- phenylene diamine) test.

133
Q

DPD#1 tests for what?

A

FAC or TBR.

134
Q

DPD#4 tests for what?

A

Test for chloramines (total chlorine) residual.

135
Q

Halogen testing can be accomplished using what?

A

The Color comparator test kit or using the Portable Spectrophotometer.

136
Q

Color comparator accuracy is what percentage?

A

(+) or (-) 10 percent.

137
Q

Portable Spectrophotometer accuracy is what percentage?

A

(+) or (-) 2 percent.

138
Q

Color Comparator Test Kit Procedure:

Open potable water tap and allow water to flow for how long?

A

2-3 minutes.

139
Q

Color Comparator Test Kit Procedure:

Rinse test tube with what?

A

Tap water.

140
Q

Color Comparator Test Kit Procedure:

Fill the test tube with how many ml’s of water?

A

10-ml tap water.

141
Q

Color Comparator Test Kit Procedure:

What needs to be added?

A

Add appropriate test tablet, cap tube, shake to dissolve.

142
Q

Color Comparator Test Kit Procedure:

Remove cap, compare sample with what?

A

Comparator,

Within sixty seconds after addition of test tablet.

143
Q

Color Comparator Test Kit Procedure:

Rinse tube of any what?

A

Residual.

144
Q

Color Comparator Test Kit Procedure:

Record the value of the matching color standard,

If the color falls between consecutive color standards, record what?

A

The lowest value.

145
Q

Color Comparator Test Kit Procedure:

If the color is deeper than 5.0 ppm chlorine or 11.0 ppm bromine color standards, add an additional what?

A

DPD#1 tablet,

Read and record.

146
Q

Color Comparator Test Kit Procedure:

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

A

Commanding Officer with a copy to Chief Engineer.

147
Q

Portable Spectrophotometer Procedure:

Open potable water tap and allow water to flow for how long?

A

2-3 minutes.

148
Q

Portable Spectrophotometer Procedure:

Fill two clean sample cells with 10 ml tap water, what are these two called?

A

Blank solution,

Sample solution.

149
Q

Portable Spectrophotometer Procedure:

Add appropriate tablet or reagent to which solution?

A

The sample solution.

150
Q

Portable Spectrophotometer Procedure:

Where do you place the blank solution?

A

Place blank solution in the cell compartment and close the cover.

151
Q

Portable Spectrophotometer Procedure:

Press ZERO key, After 2 seconds the display will read what?

A

0.00.

152
Q

Portable Spectrophotometer Procedure:

Remove blank solution and place sample solution where?

A

Into the cell compartment,

Close the cover.

153
Q

Portable Spectrophotometer Procedure:

Remove blank solution and place sample solution where?

A

Into the cell compartment,

Close the cover.

154
Q

Portable Spectrophotometer Procedure:

Press READ key. After 2 seconds the instrument will display what?

A

The result.

155
Q

Portable Spectrophotometer Procedure:

Rinse all sample cells and record what?

A

The result.

156
Q

Portable Spectrophotometer Procedure:

What is the advantage over Color comparator?

A

Eliminates human visual subjectivity.

157
Q

Portable Spectrophotometer Procedure:

Specific sample volumes, reagents, sample cells, and timing intervals depend on what?

A

The make and model of the instrument.

158
Q

Portable Spectrophotometer Procedure:

They’re also called what?

A

Portable Colorimeters.

159
Q

Bacteriological Testing Procedures:

How often is BACTI testing done?

A

Weekly,

On samples collected at representative points throughout the distribution system,

Same location and number of samples as Halogen testing.

160
Q

Bacteriological Testing Procedures:

How often is BACTI testing done?

A

Weekly,

on samples collected at representative points throughout the distribution system,

Same location and number of samples as Halogen testing.

161
Q

Bacteriological Testing Procedures:

BACTI testing includes 1/4th of what?

A

Includes 1/4th of the ice machines and 1/4th of the potable water tanks.

162
Q

Bacteriological Testing Procedures:

BACTI testing is also conducted when abnormal levels of what are present?

A

Halogen demand.

163
Q

Bacteriological Testing Procedures:

BACTI testing is done after suspicion of what?

A

Contamination.

164
Q

Bacteriological Testing Procedures:

BACTI testing is done after repairs to what?

A

Potable water system.

165
Q

Bacteriological Testing Procedures:

What are the shipboard EPA approved methods for bacteriological testing?

A

Colilert,

Colisure.

166
Q

Bacteriological Testing Procedures:

Collection and preparation of sample should be conducted in a manner that will not do what?

A

Contaminate the test samples.

167
Q

Bacteriological Testing Procedures:

Collect bacteriological test sample after doing what?

A

Halogen testing.

168
Q

Bacteriological Testing Procedures:

Label the sample bottle or bag with the following what?

A

Location,

Date and time,

Sampler’s initial.

169
Q

Bacteriological Testing Procedures:

Collect 100ml tap water in sample bottle or bag containing what?

A

Sodium thiosulfate.

170
Q

Bacteriological Testing Procedures:

Add the Colilert or Colisure reagent into what?

A

The sample bottle or bag.

171
Q

Bacteriological Testing Procedures:

Incubate samples for how long and at what temp?

A

24 hours at 35 degree C.

172
Q

Bacteriological Testing Procedures:

After 24 hours:

Examine samples and place under what?

A

365 nm UV lamp.

173
Q

Bacteriological Testing Procedures:

Colilert test results?

A

Clear is negative,

Yellow is positive for total coliform,

Fluorescent yellow (under UV light) is positive for fecal coliform.

174
Q

Bacteriological Testing Procedures:

Colisure test results?

A

Yellow is negative,

Magenta is positive for total coliforms,

Fluorescent light blue is positive for E.Coli.

175
Q

Bacteriological Testing Procedures:

Positive and negative control should be conducted when?

A

On the day of bacteriological testing.

176
Q

Bacteriological Testing Procedures:

Record the results where?

A

In the potable water log and/or TMIP including the positive and negative controls.

177
Q

Sources of Contamination:

Cross connections with what?

A

Non-potable systems.

178
Q

Sources of Contamination:

Leaks in common bulkheads between what?

A

Potable water tanks and fuel tanks, ballast tanks, bilges, and wastewater tanks.

179
Q

Sources of Contamination:

Leaks in non-potable piping through what?

A

Water tanks.

180
Q

Sources of Contamination:

Improper disposal of chemicals or liquids through what?

A

Potable water-sounding tubes.

181
Q

Sources of Contamination:

Potable water hoses used for what?

A

Non-potable liquids.

182
Q

Sources of Contamination:

Excessive storage time of water where?

A

In tanks.

183
Q

Sources of Contamination:

Shipboard water production from where?

A

Contaminated raw water source.

184
Q

Sources of Contamination:

Inadequate disinfection procedures resulting in what?

A

Development of chlorine by products.

185
Q

Sources of Contamination:

Transfer of water from shore facilities or barges, which have what?

A

Taste and odor problems.

186
Q

Sources of Contamination:

Potable water tanks used for what?

A

Non-potable water liquids.

187
Q

Sources of Contamination:

Deteriorated, improperly applied (cured/vented) what?

A

Tank coatings.

188
Q

Sources of Contamination:

Shipboard water treatment plants producing potable water while stripping fuel tanks, pumping oily bilges overboard forward of the distilling plant feed pumps suction or when in close proximity to what?

A

Other ships.

189
Q

Water Disinfection Procedures:

What are the approved methods for disinfecting shipboard potable water?

A

Chlorine and Bromine.

190
Q

Water Disinfection Procedures:

What is the automatic chlorine disinfection?

A

In-line Chlorinators,

Injects hypochlorite into system in proportion to the flow of water.

191
Q

Water Disinfection Procedures:

What is the Brominator?

A

Bromine is dispensed via resin impregnated cartridge.

192
Q

Water Disinfection Procedures:

What are the two types of brominators?

A

In Line Brominator,

Recirculation Brominator.

193
Q

Water Disinfection Procedures:

What is the In-Line Brominator?

A

Preset to deliver 0.7 ppm bromine to water during normal operating procedures,

Can deliver 2.0 ppm bromine to water when necessary,

Required for each water plant.

194
Q

Water Disinfection Procedures:

What is the Recirculation Brominator

A

Designed to boost bromine residual in potable water tank.

Draws water from the tank, injects bromine, and returns water to the same tank (recirculating).

Delivers 0.7 ppm bromine to water being recirculated.

195
Q

Water Disinfection Procedures:

What is the least desirable method of water disinfection.

A

Manual chlorine disinfection (Batch Method),

May result in over-chlorination.

196
Q

Water Disinfection Procedures:

What is the disinfection of choice?

A

Is usually Calcium Hypochlorite (HTH).

197
Q

Water Disinfection Procedures:

With Calcium Hypochlorite (HTH), The clear, slightly yellow liquid is now referred to as what?

A

“Supernatant.”

198
Q

Water Disinfection Procedures:

Excess calcium in the water will do what two things?

A

Always demand more chlorine or bromine than water without calcium,

Clog valves and screens in the distribution system.

199
Q

What are the percentages with the chlorine dosage calculator?

A

5% Sodium Hypochlorite (liquid measurement)

10% Sodium Hypochlorite (liquid measurement),

65-70% Calcium Hypochlorite (dry measurement)

200
Q

What is the chlorine dosage rule of thumb?

A

One ounce HTH Per 5,000 gallons of water equals 1.0 ppm FAC.

201
Q

Halogen Residuals:

Water from approved source?

A

0.2 ppm FAC/TBR after 30 minute contact time.

202
Q

Halogen Residuals:

Water from Unapproved source?

A

2.0 ppm FAC/TBR after 30 minute contact time.

203
Q

Halogen Residuals:

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

A

Batch Method.

204
Q

How many methods are there to disinfecting the ship’s potable water system?

A

3 methods.

205
Q

What is method 1 of disinfecting the ship’s potable water system?

A

Fill tank to over flow level,

Add chlorine to achieve 10ppm FAC through the tank,

Hold solution for 24 hours,

Drain tank,

Refill tank with potable water with required halogen residual level,

Perform bacteriological testing,

If test comes back negative use water.

206
Q

What is method 2 of disinfecting the ship’s potable water system?

A

Spray/apply directly 200ppm FAC to all tank surfaces,

Flush inlet/outlet pipes with 10ppm FAC,

Disinfected surfaces shall remain in contact with chlorine solution for a minimum of 30 minutes,

Refill tank with potable water with required halogen residual level,

Perform bacteriological testing,

If test comes back negative use water.

207
Q

What is method 3 of disinfecting the ship’s potable water system?

A

Fill 5% of tank volume with 50ppm FAC Solution,

Hold solution for 6 hours,

Add potable water to chlorine solution to fill tank; hold this water for 24 hours,

Drain tank,

Refill tank with potable water with required halogen residual level,

Perform bacteriological testing,

If test comes back negative use water.

208
Q

Controlling Taste and Odor:

Try to identify the source of the what?

A

Taste and odor problem.

209
Q

Controlling Taste and Odor:

If the source of taste and odor problem cannot be identified use what following methods?

A

Chlorination Method,

Steam Method,

Requesting outside assistance.

210
Q

Controlling Taste and Odor:

What is the chlorine method?

A

Chlorinate to 5.0 ppm FAC,

Distribute at 2.0 ppm FAC.

211
Q

Controlling Taste and Odor:

What is the steam method?

A

Use of steam requires NAVSEASYSCOM approval,

Boil sample water for one minute to ensure proper effect,

If the taste and odor have been resolve then the use of steam might be feasible,

If the taste and odor have not been resolve then steam treatment will most likely not work.

212
Q

Controlling Taste and Odor:

What is requesting outside assistance?

A

Contact NEPMU via TYCOM Medical Officer,

If problem cannot be resolved, or is suspected to involve tank coatings, the recommendation will be to notify NAVSEASYSCOM via chain of command,

Includes Naval Sea Support Center (NAVSEACEN) or In-Service Engineering Agent (ISEA).

213
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

What is the percentage?

A

65%-70% available chlorine,

(Ready-use stock)

214
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

How many ounce bottles?

A

6 ounce bottles.

215
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Has a want type of active nature?

A

Corrosive and chemically active nature.

216
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Contact with another oxidizable material may result in what?

A

Spontaneous combustion.

217
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Where do you store it?

A

In cool, dry, well - ventilated place,

Stow in a locked box mounted on a bulkhead.

218
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Should preferably be stored where?

A

The engineering office space.

219
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

The metal box storage locker such as a first aid locker should have what drilled in the bottom?

A

Three 1⁄4” holes drilled in the bottom of the box to allow release of chlorine gas.

220
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

The storage box must not be located where?

A

Machinery space,

Flammable liquids store room,

Berthing space,

Paint store room,

Oil and water test lab areas.

221
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

No more than a ____ supply shall be maintained in ready use stock at any time?

A

Seven day.

222
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Storeroom (Bulk) stocks of calcium hypochlorite must be stowed where?

A

In labeled, ventilated lockers or bins.

223
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Located where the maximum temperature will not exceed how many degrees?

A

100 degrees F and not subject to condensations or water accumulation.

224
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

The locker or bin must not be adjacent to a magazine and located at least five feet away from any heat source or surface which may exceed what temp?

A

140 degrees Fahrenheit.

225
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Must not be stored in an area where what is?

A

Paints, oils, grease, or other combustible organic materials are stored.

226
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

No more than how many six ounce bottles shall be stored in any individual locker or bin?

A

48.

227
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

Who is allowed to issue the Calcium Hypochlorite?

A

Will only be made to personnel designated by Medical or Engineering Officer.

228
Q

Storage Requirements:

Calcium Hypochlorite (HTH):

All lockers, bins and enclosures containing HTH shall be labeled with what?

A

“Hazardous material, calcium hypochlorite”

On red letters with a white background.

229
Q

Storing Bromine Cartridges:

Bromine is slightly what?

A

Corrosive and requires proper handling and storage procedures.

230
Q

Storing Bromine Cartridges:

Must be stored where?

A

In a clean, dry, well ventilated storeroom.

231
Q

Storing Bromine Cartridges:

Bromine storage lockers must have a hazardous warning plate reading what?

A

IAW NSTM Chapter 533.

232
Q

Storing Bromine Cartridges:

Bromine has a shelf life of how long?

A

Has a normal shelf life of two years from the date of manufacture.

233
Q

Water Sanitation Bill:

The water sanitation bill shall be posted conspicuously in what areas?

A

Where potable water and associated materials are processed, treated, or stored.

234
Q

Water Sanitation Bill:

Who promulgates the water sanitation bill?

A

CO promulgates the Water Sanitation Bill and is ultimately responsible.

235
Q

Water Sanitation Bill:

The bill shall consist of what parts?

A

Responsibility,

Sources,

Connection procedures for:
1) Shiptoshore
2) Shiptoship

Potable Water Hoses,

Storage Tanks,

Disinfection Procedures,

Halogen Residual Testing,

Bacteriological Testing,

Temperature, pH and Salinity Testing,

Disinfection of Tanks and Distribution System,

Distribution System,

Records.

236
Q

Potable Water Log:

A

IDC Unit 6 (13 decks)

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