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IDC SCHOOL FLASHCARS > 6-13-2 Manage Potable Water Surveillance > Flashcards

6-13-2 Manage Potable Water Surveillance Flashcards

1
Q

Define Coaming

A

A raised frame to keep out watch

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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

FAC

A

Free Available Chlorine
- Chlorine available in the forms of Hydrochlorous Acid and Hypochlorite Ions

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4
Q

Micron

A

One millionth of a meter

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5
Q

Reverse Osmosis

A

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

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6
Q

Colilert/Colisure

A

Test to detect E-Coli and coliform in potable water

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7
Q

NAVSEASYSCOM

A

Responsible for shipboard potable water systems.
- Design
- Construction
- Maintenance

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8
Q

NAVFACENGCOM

A

Naval Facilities Engineering Command
- Responsible for promulgating instructions for ship-to-shore potable water connections and providing potable water form an approved source.

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9
Q

Commanding Officers Responsibilities

A

Responsible for promulgating water sanitation bnill

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10
Q

Supply and Treatment of Potable Water

A
  • Receive
  • Store
  • Distribute
  • Produce
  • Treat
    Also conduct Halogen and pH testing
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11
Q

How many gallons per man per day, specified by whom?

A

NAVSEASYSCOM
- 50 gallons
- Does not apply to “Water Hours”
- Not less than 2 gallons per man per day
- Applicable to troop-carrying ships loading beyond their water producing capacity

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12
Q

Where do you avoid making water?

A
  • Harbors or from polluted sea water
  • Ships are in close formation
  • Stripping or discharging waste or bilge water forward from the saltwater tanks
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13
Q

3 Types of Distilling Plants

A
  • Steam
    Steam by power plants or boiler
  • Waste Heat
    Heat from Diesel engine
  • Vapor Compression
    Electrical Energy
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14
Q

Reverse Osmosis water production systems?

A

Single
- Additional disinfection with Chlorination or Bromination is required
Triple
- Usually in Subs, additional disinfection not required

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15
Q

Unauthorized Termination Points for vents and overflows lines

A
  • Food Service Spaces
  • Medical Spaces
  • Toilets
  • Electrical or electronic rooms
  • Exterior of the ship
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16
Q

Water Level Measurement, Sounding Tubes

A

Has steel tape that requires disinfection
- 100 ppm FAC for 2 mins
Labeled “Potable Water Use Only”

17
Q

Filling Lines

A
  • Color Coded Dark Blue, 18” from the deck
  • Must be an air gap and appropriate back flow prevention device
18
Q

Sanitary Requirements Potable Water Hose Lockers

A

Vermin proof, locked, 18 inches off of the deck

19
Q

Labeling Requirements

A

Hoses
- Labeled POTABLE WATER ONLY with 1 inch letters every 10 feet
Potable water Valves
- Labeled PWO 1/4’’ letters
- Handles dark blue

20
Q

Potable Water Transfer

A

When receiving to transferred via an approved source
- Halogen tesed prior to initial transfer
- If within standards (0.2 ppm), no further testing required

21
Q

Ship-to Shore Procedures

A
  • Remove shore cap and flush potable water outlet for 15-30 seconds
  • Immerse outlet, rinse fitting in 100 ppm FAC for 2 mins
  • Flush water to waste for 15-30 seconds
  • Disinfect shipboard riser connections with 100 ppc FAC
22
Q

Ship-to-ship

A
  • Both ships disinfect potable water connections
  • Leading water hose has hose cap during high-line procedure
23
Q

Purpose of Potable Water Testing Types

A

Halogen Residual
- Chlorine/Bromine
- Quick indication of water that may be improperly treated to handled
- Absence of halogen may indicate contamination
Bacertiological Testing
- Ensure good for human consumption
- Assess adequacy of disinfection process

24
Q

Water Testing Requirements

A

Published by:
- American Public Health Association (APHS)
- American Water Works Association (AWWA)
- Water Pollution Control Federation (WPCF)

25
Q

Microbiological Quality

A

MCL: Maximum Contaminant Level for COLIFORM bacteria
- Follow EPA MCL

26
Q

Frequency of Microbiological Quality

A
  • Performed weekly
  • Represent sites through-out distribution system
27
Q

Number of weekly activity samples is population dependent

A
  • 400 or less, no less than 4 samples
  • Over 400-800, require 8 samples
  • More than 800 require 12 samples
  • Includes 1/4 of ship’s ice machines and potable water tanks
  • Emergency potable water tested monthly
28
Q

Halogen types

A

Chlorine or Bromine residuals
- DPD #1, test for FAN or TBR
- DPD #4. test for chloramines (total chlorines)

Halogen testing using the Color Compatator or Portable Spectrophotometer
- Color accuracy +/- 10%
- Portable Spectrophotometer +/- 2%

29
Q

Shipboard EPA approved methods for Bac T

A

Colilert
Colisure

30
Q

Bac T sample bottle or bag label

A

Location
Date and time
Sampler’s initial

31
Q

Colilert Sample results

A

Examine under 365 nm UV Lamp
- Clear is negative
- Yellow is positive for total coliform
- Fluorescent Yellow (Under UV light) is positive for fecal Coliform

32
Q

Colilsure Sample results

A

Examine under 365 nm UV Lamp
- Yellow is negative
- Magenta + for total coliform
- Fluorescent light blue is + for E. Coli

33
Q

2 Types of Brominators

A

In-Line (Proportioning)
- .7 ppm bromine to water during normal operations
- Can deliver 2.0 ppm when necessary
Recirculation
- Delivers .7 ppm bromine to water recirculated

34
Q

Manual Chlorine Disinfection Method

A

Batch Method
- Least desirable, can result in OVER chlorination

35
Q

Halogen Residuals

A

Approved Source
- 0.2 ppm FAC/TBR after 30 min contact time
Unapproved Source
- 2.0 ppm FAC/TBR after 30 min contact time
If not able to reach 2.0, use Batch Method

36
Q

Disinfection Method 1

A
  • Fill to overflow level
  • Add chlorine to achieve 10 ppm
  • Hold for 24 hrs
  • Drain tank, refill with potable water at required halogen level
  • Perform BacT, use water if negative
37
Q

Method 2

A
  • Apply directly to tank surfaces at 200 ppm
  • Flush at 10 ppm FAC
  • Remain in contact with surface for min. 30 minutes
38
Q

Method 3

A
  • Fill 5% of tank with 50ppm FAC
  • Hold for 6 hours
  • Add potable water to chlorine solution, hold for 24 hours

IDC SCHOOL FLASHCARS (21 decks)

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