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23 Cards in this Set
- Front
- Back
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What information does Section I Chapter 9 of NAVMED P-5010 cover?
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Preventive Medicine for Ground Forces
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What information does Section II of Chapter 9 of NAVMED P-5010 cover?
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Water Supply Sanitation in the Field
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Who is ultimately responsible to ensure there are sufficient quantities of safe water for their personnel?
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Unit commanders
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What is responsible for providing sufficient potable water for he population to be served?
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Engineers
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Who is responsible to advise the commanding officer on water quality issues?
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The medical department
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Who must be familiar with, and follow, proper water discipline?
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All personnel
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True or False. All water sources in the field should be considered unsafe until they've been evaluated and approved by the medical department.
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True
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What three factors are considered when choosing a raw water source?
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Quantity, quality and accessibility.
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Ground water sources must be located at least how many feet from all existing sources of contamination?
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100 feet, and situated so that the drainage is away from the well or spring
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What processes can be used to treat and purify water?
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Aeration, coagulation, flocculation, filtration, reverse osmosis, and disinfection
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What is the preferred agent for disinfecting potable water?
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Calcium hypochlorite, 50-70% (HTH), because it comes in granular form, has a long shelf-life and is readily available from the Navy stock system.
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What are two other forms of chlorine that can be used to disinfect potable water?
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Sodium hypochlorite (5 or 10%) and chlorine gas.
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What is the required chlorine residual for public water systems of questionable quality?
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5 ppm FAC after a 30 minute contact time and maintain at a minimum 2 ppm FAC throughout the distribution system.
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What is the required chlorine residual for engineering water points?
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5 ppm at the standpipe or fill-hose.
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What is the required chlorine residual for water tankers, trailers, bladders, and cans?
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Between 5 and 2 ppm
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What is the required chlorine residual for a distribution (piping) system?
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5 ppm at the source and 2 ppm at the spigot.
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What is the required chlorine residual for lyster bags and canteens?
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2 ppm from aproved water sources.
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What process is used to disinfect water containers and distribution systems initially or when they have become contaminated?
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Superchlorination
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How is superchlorination accomplished?
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By chlorinating the water in a container or distribution system to at least 100 ppm and holding it in the container for 4 hours.
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What residual must superchlorinated water be after 4 hours of contact time?
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50 ppm
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What may be used in place of water purification tablets when purifying water in small containers such as canteens or water jugs?
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Tincture of iodine 2%; five drops per quart; ten drops if the water is cloudy.
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How many water purification tablets are used to purify a 5 gallon container?
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40 iodine tablets.
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How must all containers used for the treatment, storage or distribution of water be labeled?
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"Potable water"
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