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NAVMED P-5010 Ch09

Manual of Naval Preventive Medicine Ch 9: Ground Forces

QuestionAnswer
What information does Chapter 9 of NAVMED P-5010 cover? Preventive Medicine for Ground Forces
What information does Section II of Chapter 9 of NAVMED P-5010 cover? Water Supply Sanitation in the Field
Who is ultimately responsible to ensure there are sufficient quantities of safe water for their personnel? Unit commanders
Who is responsible for providing sufficient potable water for he population to be served? Engineers
Who is responsible to advise the commanding officer on water quality issues? The medical department
Who must be familiar with, and follow, proper water discipline? All personnel
True or False. All water sources in the field should be considered unsafe until they've been evaluated and approved by the medical department. True
Where may water be obtained from in the field? Rivers, streams, ponds, lakes, wells, ice, snow, and oceans.
What three factors are considered when choosing a raw water source? Quantity, quality and accessibility.
What are potential sources for water? Existing public water systems, surface water, ground water, salt water, and other sources.
Ground water sources must be located at least how many feet from all existing sources of contamination? 100 feet, and situated so that the drainage is away from the well or spring
What must be done with salt water before it is consumed? It must be desalinated and disinfected
What processes can be used to treat and purify water? Aeration, coagulation, flocculation, filtration, reverse osmosis, and disinfection
What are two examples of equipment currently used to purify water? ROWPU and ERDLATOR
What is the preferred agent for disinfecting potable water? 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.
What are two other forms of chlorine that can be used to disinfect potable water? Sodium hypochlorite (5 or 10%) and chlorine gas.
What is the first step to chlorinating with HTH? Make a small amount of HTH contained by dissolving a measured amount of calcium hypochlorite granules in a clean container of water. Stir thoroughly.
What is the second step to chlorinating with HTH? Pour the supertanant into the water to be disinfected. Provide sufficient agitation to promote thorough mixing.
What is the final step in chlorinating with HTH? Take a measurement of the resulting FAC 30 minutes after adding the chlorine.
What is the required chlorine residual for public water systems of questionable quality? 5 ppm FAC after a 30 minute contact time and maintain at a minimum 2 ppm FAC throughout the distribution system.
What is the required chlorine residual for engineering water points? 5 ppm at the standpipe or fill-hose.
What is the required chlorine residual for water tankers, trailers, bladders, and cans? Between 5 and 2 ppm
What is the required chlorine residual for a distribution (piping) system? 5 ppm at the source and 2 ppm at the spigot.
What is the required chlorine residual for lyster bags and canteens? 2 ppm from aproved water sources.
What process is used to disinfect water containers and distribution systems initially or when they have become contaminated? Superchlorination
How is superchlorination accomplished? By chlorinating the water in a container or distribution system to at least 100 ppm and holding it in the container for 4 hours.
What residual must superchlorinated water be after 4 hours of contact time? 50 ppm
What may be used in place of water purification tablets when purifying water in small containers such as canteens or water jugs? Tincture of iodine 2%; five drops per quart; ten drops if the water is cloudy.
How many water purification tablets are used to purify a 5 gallon container? 40 iodine tablets.
What are the disadvantages of boiling water to purify it? Fuel is required, it's time consuming, and there's no residual substance in the water to guard it against contamination.
How must all containers used for the treatment, storage or distribution of water be labeled? "Potable water"
As a rule of thumb, what is the minimum amount of water required for an advanced base medical facility per medical treatment bed per day? 65 gallons
Where must FAC testing be recorded? In the Medical Department Water Log.
Created by: RabbittDK10