NAVMED P-5010, Manual of the Naval Preventive Medicine, Chapter 6

This Power Point is part of an Enlisted Advancement Program training series for US Navy Corpsman rating provided by Naval Medical Center Portsmouth Virginia

Naval Medical Center Portsmouth is a military treatment facility serving active duty service members, their dependents and retirees in the Hampton Roads community of southeastern Virginia and northeastern North Carolina.

1. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
NAVMED P-5010 Chapter 6 NAVMED P-5010 Chapter 6
Water Supply AfloatWater Supply Afloat
A presentation by:A presentation by:

2. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ScopeScope
Provides information for safe and proper potable Provides information for safe and proper potable
water handling procedures aboard vessels.water handling procedures aboard vessels.
All personnel concerned with loading, treatment, All personnel concerned with loading, treatment,
storage, distribution, and medical surveillance of storage, distribution, and medical surveillance of
potable water should be familiar with current potable water should be familiar with current
OPNAV, Fleet, Type, Area, Force, and OPNAV, Fleet, Type, Area, Force, and
Command Instructions and Notices. Command Instructions and Notices.

3. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ResponsibilitiesResponsibilities
Naval Sea Systems Command (NAVSEASYSCOM)-Naval Sea Systems Command (NAVSEASYSCOM)- responsible responsible
for the design, construction, and maintenance of the shipboard for the design, construction, and maintenance of the shipboard
potable water supply, distribution systems, treatment facilities and potable water supply, distribution systems, treatment facilities and
processes to assure that safe drinking water is available at all times.processes to assure that safe drinking water is available at all times.
Naval Facilities Engineering Command (NAVFACENGCOM)-Naval Facilities Engineering Command (NAVFACENGCOM)-
responsible for promulgating instructions for ship-to-shore potable responsible for promulgating instructions for ship-to-shore potable
water connections and for providing potable water from an approved water connections and for providing potable water from an approved
source when the ship is berthed at a naval facility.source when the ship is berthed at a naval facility.
Chief, Bureau of Medicine and Surgery (BUMED)-Chief, Bureau of Medicine and Surgery (BUMED)-establish and establish and
promulgate standards for water quality ashore and afloat, promulgate standards for water quality ashore and afloat,
appropriate instructions, notices, or other publications to reflect appropriate instructions, notices, or other publications to reflect
water quality requirements and will insure medical surveillance of water quality requirements and will insure medical surveillance of
potable water distribution systems aboard ship and overseas potable water distribution systems aboard ship and overseas
activities. activities.

4. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ResponsibilitiesResponsibilities
Area, fleet, and subordinate commanders-Area, fleet, and subordinate commanders- issue the necessary issue the necessary
implementing directives to insure that adequate water sanitation implementing directives to insure that adequate water sanitation
standards are provided and enforced in each ship within the standards are provided and enforced in each ship within the
command.command.
Commanding Officer-Commanding Officer-promulgate a water sanitation bill to insure promulgate a water sanitation bill to insure
that procedures for receipt, transfer, treatment, storage, distribution, that procedures for receipt, transfer, treatment, storage, distribution,
and surveillance are provided and followed.and surveillance are provided and followed.
Engineering Department-Engineering Department-responsible to the Commanding Officer responsible to the Commanding Officer
for implementing the requirements of the Naval Sea Systems for implementing the requirements of the Naval Sea Systems
Command, including the operation and maintenance of the Command, including the operation and maintenance of the
shipboard water supply system, production of an adequate amount shipboard water supply system, production of an adequate amount
of water, and insuring bacteriological purity through disinfection.of water, and insuring bacteriological purity through disinfection.

5. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ResponsibilitiesResponsibilities
Medical Department-Medical Department-conducts a comprehensive conducts a comprehensive
medical surveillance program of the potable water medical surveillance program of the potable water
system including adequacy of disinfecting procedures, system including adequacy of disinfecting procedures,
collection of samples for bacteriological analysis, and collection of samples for bacteriological analysis, and
daily halogen residuals from the distribution system. daily halogen residuals from the distribution system.
The Medical Department shall notify the Commanding The Medical Department shall notify the Commanding
Officer of any discrepancies observed in the water Officer of any discrepancies observed in the water
distribution system. distribution system.

6. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Shipboard Potable WaterShipboard Potable Water
Obtained by the following means: Obtained by the following means:
Distillation or other approved methodDistillation or other approved method
Shore-to-ship delivery from an approved Shore-to-ship delivery from an approved
source source
Shore-to-ship delivery from an unapproved Shore-to-ship delivery from an unapproved
source source
Ship-to-shipShip-to-ship

7. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Sea WaterSea Water
Prohibited in all food services spaces unless approved by BUMED. Prohibited in all food services spaces unless approved by BUMED.
Cross connections between potable and sea water of other systems Cross connections between potable and sea water of other systems
are not permitted. are not permitted.
Specific garbage grinders have been approved by BUMED for use Specific garbage grinders have been approved by BUMED for use
in designated sculleries. in designated sculleries.
Permitted on ice cream machines and ice machines for cooling Permitted on ice cream machines and ice machines for cooling
purposes.purposes.
Used in the fire mains and under certain controlled circumstances, Used in the fire mains and under certain controlled circumstances,
such as: flushing weather decks, water closets, urinals, garbage such as: flushing weather decks, water closets, urinals, garbage
chutes, decontamination showers and laundering. chutes, decontamination showers and laundering.
If it is necessary in an emergency situation to produce water from If it is necessary in an emergency situation to produce water from
contaminated sources, the Medical Department must insure that contaminated sources, the Medical Department must insure that
increased surveillance of the system is instituted.increased surveillance of the system is instituted.

8. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water UsagePotable Water Usage
Type of useType of use Gallon per person per Gallon per person per
dayday
Drinking waterDrinking water 0.5-1.00.5-1.0
Galley and SculleryGalley and Scullery 1.5-4.01.5-4.0
Personal and HygienePersonal and Hygiene5.0-20.05.0-20.0
LaundryLaundry 5.0-20.05.0-20.0
TotalTotal 12.0-35.012.0-35.0

9. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Approved SourcesApproved Sources
Facilities owned and/or operated by the U.S. military. Facilities owned and/or operated by the U.S. military.
Water points listed in U.S. Public Health Service, Food and Drug Water points listed in U.S. Public Health Service, Food and Drug
Administration, publication, "Acceptable Vessel Watering Points Administration, publication, "Acceptable Vessel Watering Points
Interstate Conveyance Official Classification List." Contact the area Interstate Conveyance Official Classification List." Contact the area
Navy Environmental and Preventive Medicine Unit Navy Environmental and Preventive Medicine Unit
(NAVENPVNTMEDU).(NAVENPVNTMEDU).
Establishments under the cognizance of the British Royal Navy, Establishments under the cognizance of the British Royal Navy,
Canadian Forces, and the Royal Australian Navy. These sources Canadian Forces, and the Royal Australian Navy. These sources
are subject to termination or modification.are subject to termination or modification.
See the current American-British-Canadian-Australian Naval See the current American-British-Canadian-Australian Naval
Quadripartite Standardization Agreement Program, ABCA Quadripartite Standardization Agreement Program, ABCA
NAVSTAG 23, Quality Standards for Potable Water.NAVSTAG 23, Quality Standards for Potable Water.

10. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Sources Doubtful QualitySources Doubtful Quality
The Medical Officer, Medical Department The Medical Officer, Medical Department
Representative (MDR), or a responsible Representative (MDR), or a responsible
officer must investigate the source and officer must investigate the source and
examine the water as thoroughly as examine the water as thoroughly as
possible with the means available; he possible with the means available; he
must then advise the Commanding must then advise the Commanding
Officer. Officer.

11. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Care Of Potable Care Of Potable
Water HosesWater Hoses
Must not be used for any other purpose.Must not be used for any other purpose.
They must be properly labeled, stored, and protected from sources They must be properly labeled, stored, and protected from sources
of contamination at all times, must be examined routinely and of contamination at all times, must be examined routinely and
removed from use when cracks develop in the lining or leaks occur. removed from use when cracks develop in the lining or leaks occur.
The receiving connection of ship potable water risers shall be at The receiving connection of ship potable water risers shall be at
least 18 inches above the deck and turned down, except when the least 18 inches above the deck and turned down, except when the
risers are located within the ship, such as in submarines. Each hose risers are located within the ship, such as in submarines. Each hose
connection must be fitted with a cap and keeper chain. Ship risers connection must be fitted with a cap and keeper chain. Ship risers
must be properly labeled, color coded, and disinfected prior to each must be properly labeled, color coded, and disinfected prior to each
use.use.
Sounding tubes for potable water tanks will be equipped with screw Sounding tubes for potable water tanks will be equipped with screw
caps attached to keeper chains and must be secured with a lock. caps attached to keeper chains and must be secured with a lock.
On those ships with sounding rods, when not in actual use, the rod On those ships with sounding rods, when not in actual use, the rod
should remain in the tube at all times. On those ships utilizing steel should remain in the tube at all times. On those ships utilizing steel
tapes, the tape must be sanitized prior to each use and must be tapes, the tape must be sanitized prior to each use and must be
used for potable water measurements only.used for potable water measurements only.

12. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Shore-Ship ProceduresShore-Ship Procedures
Remove cap and flush pier side potable water outlet for 15 to 30 Remove cap and flush pier side potable water outlet for 15 to 30
seconds. Immerse outlet and rinse fitting in a solution containing seconds. Immerse outlet and rinse fitting in a solution containing
100 ppm chlorine for at least 2 minutes. Flush to waste for 15 to 30 100 ppm chlorine for at least 2 minutes. Flush to waste for 15 to 30
seconds. seconds.
Deliver a clean disinfected potable water hose to the outlet just Deliver a clean disinfected potable water hose to the outlet just
before the connection is made (potable water hoses should be before the connection is made (potable water hoses should be
provided by the shore facility). Remove hose caps or uncouple hose provided by the shore facility). Remove hose caps or uncouple hose
ends and disinfect if necessary. Connect to pierside outlet and flush. ends and disinfect if necessary. Connect to pierside outlet and flush.
Disinfect shipboard riser connections. Connect hose to the potable Disinfect shipboard riser connections. Connect hose to the potable
water shipboard riser and deliver potable water. water shipboard riser and deliver potable water.
When the transfer is completed, secure the shore water source, When the transfer is completed, secure the shore water source,
remove the ship connection, then the shore connection. Thoroughly remove the ship connection, then the shore connection. Thoroughly
flush the potable water outlet and recap. Drain the potable water flush the potable water outlet and recap. Drain the potable water
hose thoroughly and store in the potable water hose storage locker. hose thoroughly and store in the potable water hose storage locker.

13. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Ship to shipShip to ship
Supplying ship will provide hoses.Supplying ship will provide hoses.
The leading potable water hose should have the cap in place during The leading potable water hose should have the cap in place during
the high-line procedure. the high-line procedure.
When the potable water hose is secured by the receiving ship, the When the potable water hose is secured by the receiving ship, the
cap is removed and the hose coupling is disinfected. cap is removed and the hose coupling is disinfected.
Both ships disinfect their respective potable water riser connections. Both ships disinfect their respective potable water riser connections.
The supplying ship connects its end and flushes the hose.The supplying ship connects its end and flushes the hose.
When the transfer is completed, the receiving ship removes the When the transfer is completed, the receiving ship removes the
potable water hose and replaces the caps on the receiving potable water hose and replaces the caps on the receiving
connection and the potable water hose.connection and the potable water hose.
The supplying ship then retrieves, couples or caps, and properly The supplying ship then retrieves, couples or caps, and properly
stores the potable water hose.stores the potable water hose.

14. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water ProductionPotable Water Production
Distilling plants installed on naval vessels are of three general Distilling plants installed on naval vessels are of three general
types:types:
1.1.Steam distilling plants are operated by steam supplied directly or Steam distilling plants are operated by steam supplied directly or
indirectly from a power plant or auxiliary boiler.indirectly from a power plant or auxiliary boiler.
2.2.Waste heat distilling plants are submerged tube type and use heat Waste heat distilling plants are submerged tube type and use heat
derived from diesel engine jacket water. derived from diesel engine jacket water.
3.3.Vapor compression type require primarily only electrical energy for Vapor compression type require primarily only electrical energy for
operations; however, additional heat exchangers that use waste operations; however, additional heat exchangers that use waste
heat (exhaust gas or cooling water) may be installed.heat (exhaust gas or cooling water) may be installed.
Reverse OsmosisReverse Osmosis
Potable water production is an engineering responsibility, the Potable water production is an engineering responsibility, the
Medical Department must be cognizant of the process in order to Medical Department must be cognizant of the process in order to
adequately provide surveillance and recommendations associated adequately provide surveillance and recommendations associated
with potable water. with potable water.

15. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water TanksPotable Water Tanks
The construction and location of potable water The construction and location of potable water
tanks should prevent contamination of the tanks should prevent contamination of the
contents. For full utilization of space, potable contents. For full utilization of space, potable
water is stored on most ships in inner bottom water is stored on most ships in inner bottom
tanks, other skin tanks, and peak tanks. tanks, other skin tanks, and peak tanks.
Potable water tanks should not be filled with Potable water tanks should not be filled with
ballast water unless absolutely necessary for the ballast water unless absolutely necessary for the
survival of the ship.survival of the ship.

16. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Vents and/or Overflow LinesVents and/or Overflow Lines
The openings must be screened with 18-mesh The openings must be screened with 18-mesh
or finer non-corrosive metal wire.or finer non-corrosive metal wire.
They must not terminate in food service, They must not terminate in food service,
medical, toilet or other spaces where medical, toilet or other spaces where
contamination or odors may be transmitted to contamination or odors may be transmitted to
the water, nor in any space where electrical or the water, nor in any space where electrical or
electronic equipment is located. electronic equipment is located.
In no instance will potable water tanks vent In no instance will potable water tanks vent
outside the ship.outside the ship.

17. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ManholesManholes
If a manhole is located on the side of the tank, flush-type If a manhole is located on the side of the tank, flush-type
construction is acceptable.construction is acceptable.
If located on the top (including the deck, if the deck If located on the top (including the deck, if the deck
forms the top of the tank), a coaming or curb rising at forms the top of the tank), a coaming or curb rising at
least one-half inch above the top of the tank must be least one-half inch above the top of the tank must be
provided and the manhole cover must extend to the provided and the manhole cover must extend to the
outer edge of the curb or flange. The cover must have an outer edge of the curb or flange. The cover must have an
intact gasket and a device for securing it in place. intact gasket and a device for securing it in place.
Normally, manholes not exposed to the weather decks Normally, manholes not exposed to the weather decks
are fitted with the flush-type manhole cover or the raised, are fitted with the flush-type manhole cover or the raised,
bolted-plate cover. The latter is preferable for potable bolted-plate cover. The latter is preferable for potable
water tanks.water tanks.

18. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Measurement of Water LevelMeasurement of Water Level
There are several methods for measurement of water in tanks There are several methods for measurement of water in tanks
including automatic level gauges, petcocks, and sounding tubes. including automatic level gauges, petcocks, and sounding tubes.
Sounding rods, when not in use, the rod should remain in the tube at Sounding rods, when not in use, the rod should remain in the tube at
all times. On those ships using steel tapes, the tapes must be all times. On those ships using steel tapes, the tapes must be
sanitized prior to each use, stored in a sanitary manner, and used sanitized prior to each use, stored in a sanitary manner, and used
only for potable water measurements.only for potable water measurements.
Sounding tapes may be sanitized by soaking the entire tape Sounding tapes may be sanitized by soaking the entire tape
apparatus in a solution of 100 ppm chlorine for two minutes. apparatus in a solution of 100 ppm chlorine for two minutes.
Another method which can be used involves wiping the tape with a Another method which can be used involves wiping the tape with a
clean rag soaked in a disinfectant solution such as food service clean rag soaked in a disinfectant solution such as food service
disinfectant, iodine disinfectant or alcohol sponges. disinfectant, iodine disinfectant or alcohol sponges.

19. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water PipingPotable Water Piping
Insure than an adequate air gap is provided Insure than an adequate air gap is provided
between the potable water outlet and a non-between the potable water outlet and a non-
potable water system, should be airtight and free potable water system, should be airtight and free
from cross-connectionsfrom cross-connections
The hot water heaters serving habitability The hot water heaters serving habitability
spaces must limit the minimum and maximum spaces must limit the minimum and maximum
temperature of the water at the plumbing fixture temperature of the water at the plumbing fixture
to 130°F and 140°F respectfully to 130°F and 140°F respectfully
Charcoal impregnated or other filter equipment Charcoal impregnated or other filter equipment
shall not be connected to potable water piping shall not be connected to potable water piping
outletsoutlets

20. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
RepairsRepairs
If any break, accidental or intentional, occurs in If any break, accidental or intentional, occurs in
the potable water system, or a potable water the potable water system, or a potable water
tank is entered for any reason, all involved tank is entered for any reason, all involved
tanks, parts and lines must be disinfected prior tanks, parts and lines must be disinfected prior
to returning the system to use.to returning the system to use.
The Medical Department must be notified of the The Medical Department must be notified of the
break or entry and the disinfection procedure break or entry and the disinfection procedure
accomplished by the engineering department. accomplished by the engineering department.

21. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Labeling and Color CodingLabeling and Color Coding
Potable water sounding tubes will be clearly labeled with Potable water sounding tubes will be clearly labeled with
an identification plate. The sounding tube cover will be an identification plate. The sounding tube cover will be
color coded dark blue. On ships using steel tapes to color coded dark blue. On ships using steel tapes to
sound potable water tanks, the tape handle must be sound potable water tanks, the tape handle must be
color coded dark blue, labeled, or otherwise identified color coded dark blue, labeled, or otherwise identified
"POTABLE WATER USE ONLY". "POTABLE WATER USE ONLY".
Valves for receiving or supplying potable water must be Valves for receiving or supplying potable water must be
conspicuously designated by a warning plate bearing the conspicuously designated by a warning plate bearing the
inscription "POTABLE WATER ONLY" in 1 inch high inscription "POTABLE WATER ONLY" in 1 inch high
lettersletters..

22. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Labeling and Color CodingLabeling and Color Coding
Hoses for receiving and discharging potable Hoses for receiving and discharging potable
water must be approved for that purpose by water must be approved for that purpose by
NAVSEASYSCOM or BUMED. Potable water NAVSEASYSCOM or BUMED. Potable water
hoses must be labeled "POTABLE WATER hoses must be labeled "POTABLE WATER
ONLY" approximately every 10 feet with the end ONLY" approximately every 10 feet with the end
couplings painted dark blue.couplings painted dark blue.
Potable water lines passing through any given Potable water lines passing through any given
space must be appropriately labeled to indicate space must be appropriately labeled to indicate
the type of service and with an arrow indicating the type of service and with an arrow indicating
the direction of the flow. the direction of the flow.

23. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water Hose LockersPotable Water Hose Lockers
Potable water hose storage lockers must be Potable water hose storage lockers must be
identified and labeled "POTABLE WATER identified and labeled "POTABLE WATER
ONLY." ONLY."
The lockers must be vermin proof, locked, and The lockers must be vermin proof, locked, and
be elevated at least 18 inches off the deck when be elevated at least 18 inches off the deck when
located on weather decks.located on weather decks.
Printed instructions outlining step-by-step Printed instructions outlining step-by-step
methods for disinfection of potable water hoses methods for disinfection of potable water hoses
and risers must be posted in a conspicuous and risers must be posted in a conspicuous
location inside the hose storage locker.location inside the hose storage locker.

24. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Disinfection of Potable Disinfection of Potable
Water SuppliesWater Supplies
Shipboard water is disinfected by the addition of Shipboard water is disinfected by the addition of
sufficient chlorine or bromine compound to produce not sufficient chlorine or bromine compound to produce not
less than 0.2 ppm Free Available Chlorine (FAC) or Total less than 0.2 ppm Free Available Chlorine (FAC) or Total
Bromine Residual (TBR) after thirty minutes contact Bromine Residual (TBR) after thirty minutes contact
time. time.
The amount of chlorine or bromine required to produce a The amount of chlorine or bromine required to produce a
FAC or TBR of not less than 0.2 ppm after thirty minutes FAC or TBR of not less than 0.2 ppm after thirty minutes
can vary widely because of halogen demand (the can vary widely because of halogen demand (the
amount of chlorine or bromine used through reaction amount of chlorine or bromine used through reaction
with substances present in the water). All water has with substances present in the water). All water has
some halogen demand, even distilled water produced by some halogen demand, even distilled water produced by
the evaporators. the evaporators.

25. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Disinfectants(halogens)Disinfectants(halogens)
At present, two halogen compounds, chlorine and At present, two halogen compounds, chlorine and
bromine, are the only approved methods for disinfecting bromine, are the only approved methods for disinfecting
shipboard potable water shipboard potable water
Calcium hypochlorite (HTH) is most frequently used Calcium hypochlorite (HTH) is most frequently used
because of its relatively long shelf life and lesser space because of its relatively long shelf life and lesser space
requirements, must be stowed in a locked box requirements, must be stowed in a locked box
Should be obtained in six-ounce containers and stored in Should be obtained in six-ounce containers and stored in
a cool, dry, well-ventilated place where there is no a cool, dry, well-ventilated place where there is no
danger of contact with oxidizable materials.danger of contact with oxidizable materials.
Vent holes (such as three 1/4 inch holes) shall be drilled Vent holes (such as three 1/4 inch holes) shall be drilled
in the bottom of the box to allow release of any chlorine in the bottom of the box to allow release of any chlorine
products products

26. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Disinfectants(halogens)Disinfectants(halogens)
Must be located in an area where the maximum Must be located in an area where the maximum
temperature will not exceed 100°Ftemperature will not exceed 100°F
Must be labeled with red letters on a white background, Must be labeled with red letters on a white background,
(HAZARDOUS MATERIAL, CALCIUM (HAZARDOUS MATERIAL, CALCIUM
HYPOCHLORITE). HYPOCHLORITE).
Bromine is provided by a bromine impregnated resin Bromine is provided by a bromine impregnated resin
cartridgecartridge must be stored in clean, dry, ventilated must be stored in clean, dry, ventilated
storeroomstoreroom
Shelf life of two years from the date of manufactureShelf life of two years from the date of manufacture

27. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Mechanical Methods Mechanical Methods
of Disinfectionof Disinfection
Naval vessels use several types of chlorinator installations. Naval vessels use several types of chlorinator installations.
Chlorinators may be installed in the distilling plant, distillate line, and Chlorinators may be installed in the distilling plant, distillate line, and
the shore fill line. The chlorinator may also serve both the distillate the shore fill line. The chlorinator may also serve both the distillate
line and the shore fill line. line and the shore fill line.
Brominator treatment installations use two types of brominators. Brominator treatment installations use two types of brominators.
One type is used on the distillate discharge line and the other is One type is used on the distillate discharge line and the other is
used to recirculate water in the potable water tanks during used to recirculate water in the potable water tanks during
treatment. treatment.
The distilling plant is equipped with an office that gauges a The distilling plant is equipped with an office that gauges a
predetermined proportion of the flow through a bromine cartridge. predetermined proportion of the flow through a bromine cartridge.
This device is preset to deliver 0.7 ppm bromine to the water. This device is preset to deliver 0.7 ppm bromine to the water.
The recirculation brominator system is designed to treat water in The recirculation brominator system is designed to treat water in
potable water tanks. Treatment is accomplished by the recirculation potable water tanks. Treatment is accomplished by the recirculation
of potable water from a potable water tank through the brominator of potable water from a potable water tank through the brominator
and back to the same tank.and back to the same tank.

28. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Batch ChlorinationBatch Chlorination
Used if mechanical methods for treatment are not available.Used if mechanical methods for treatment are not available.
However, this is considered the least desirable method of However, this is considered the least desirable method of
disinfecting potable water because it may result in over-chlorination disinfecting potable water because it may result in over-chlorination
due to the inability to properly mix the water and hypochlorite due to the inability to properly mix the water and hypochlorite
solution. solution.
The proper dosage of chemical must be determined for the volume The proper dosage of chemical must be determined for the volume
of water to be disinfected.of water to be disinfected.
When 65 to 70% calcium hypochlorite is used, the calculated When 65 to 70% calcium hypochlorite is used, the calculated
amount is dissolved in a non-glass container of warm water and the amount is dissolved in a non-glass container of warm water and the
suspended matter is allowed to settle out. suspended matter is allowed to settle out.
The clear fluid (supernatant) is introduced into the sounding tube The clear fluid (supernatant) is introduced into the sounding tube
when the tank is about one-quarter full, add one gallon of potable when the tank is about one-quarter full, add one gallon of potable
water to flush the sounding tube.water to flush the sounding tube.
The remaining sediment is discarded. The remaining sediment is discarded.

29. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Batch ChlorinationBatch Chlorination
Sufficient mixing usually will be obtained by stirring action of the Sufficient mixing usually will be obtained by stirring action of the
incoming water as the tank is being filled.incoming water as the tank is being filled.
The motion of the ship will make a small contribution to mixing, and The motion of the ship will make a small contribution to mixing, and
additional mixing may be obtained by recirculation.additional mixing may be obtained by recirculation.
If the chlorine solution must be introduced into a full tank, If the chlorine solution must be introduced into a full tank,
recirculation through a pump is the only way to achieve adequate recirculation through a pump is the only way to achieve adequate
mixing. If pumps are used which are not an integral part of the mixing. If pumps are used which are not an integral part of the
potable water system, they must be disinfected.potable water system, they must be disinfected.
Thirty minutes or more after the tank is filled or mixing is completed, Thirty minutes or more after the tank is filled or mixing is completed,
the water should be sampled and tested for a FAC residual. the water should be sampled and tested for a FAC residual.
If the FAC residual is less than required, additional chlorine must be If the FAC residual is less than required, additional chlorine must be
added and mixed into the water, after the required contact time, the added and mixed into the water, after the required contact time, the
FAC residual must be determined again. FAC residual must be determined again.

30. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Batch ChlorinationBatch Chlorination
A convenient figure to remember is that one ounce of full strength A convenient figure to remember is that one ounce of full strength
calcium hypochlorite added to five-thousand gallons of water is the calcium hypochlorite added to five-thousand gallons of water is the
approximate dose for 1.0 ppm initial chlorine concentration. (NOTE: approximate dose for 1.0 ppm initial chlorine concentration. (NOTE:
The amount of active chlorine in 65 to 70% calcium hypochlorite is The amount of active chlorine in 65 to 70% calcium hypochlorite is
reduced rapidly by exposure to air, therefore, all the contents should reduced rapidly by exposure to air, therefore, all the contents should
be used as soon as possible after opening the container.) be used as soon as possible after opening the container.)
This rule of "thumb" (one ounce per five thousand gallons) becomes This rule of "thumb" (one ounce per five thousand gallons) becomes
a tool in calculating dosages for "batch chlorination" and is a tool in calculating dosages for "batch chlorination" and is
suggested as a starling point only; the required amount will depend suggested as a starling point only; the required amount will depend
on temperature, pH, and the chlorine demand of the water. on temperature, pH, and the chlorine demand of the water.

31. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Disinfection of Potable Water Disinfection of Potable Water
Tanks and SystemsTanks and Systems
a. Mechanical cleaning and chemical disinfection. a. Mechanical cleaning and chemical disinfection.
b. Chemical disinfection only.b. Chemical disinfection only.
Mechanical cleaning of tanks includes all measures Mechanical cleaning of tanks includes all measures
necessary to clean tanks of foreign materials, rust, and necessary to clean tanks of foreign materials, rust, and
other substances that are present within the tanks. other substances that are present within the tanks.
Mechanical cleaning and chemical disinfection will be Mechanical cleaning and chemical disinfection will be
accomplished when the condition of the tanks has accomplished when the condition of the tanks has
deteriorated to the point where the chlorine demand has deteriorated to the point where the chlorine demand has
increased significantly and bacteriological evidence increased significantly and bacteriological evidence
indicates that the tank has become grossly polluted. indicates that the tank has become grossly polluted.

32. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
When to DisinfectWhen to Disinfect
Tanks of new ships or tanks which have been Tanks of new ships or tanks which have been
rehabilitated or repaired. rehabilitated or repaired.
Where sludge or rust accumulation seriously Where sludge or rust accumulation seriously
impairs the quality of water delivered. impairs the quality of water delivered.
Tanks which have been loaded with non-potable Tanks which have been loaded with non-potable
ballast water. ballast water.
Voids or tanks converted from nonpotable water Voids or tanks converted from nonpotable water
to potable water tanks. to potable water tanks.

33. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
When to DisinfectWhen to Disinfect
Butterworthing or mechanical cleaning at sea with sea Butterworthing or mechanical cleaning at sea with sea
water is permissible, but must always be followed by water is permissible, but must always be followed by
chemical disinfectionchemical disinfection
Chemical disinfection is required when the following Chemical disinfection is required when the following
conditions exist: conditions exist:
a. Tanks in which there is continued bacteriological a. Tanks in which there is continued bacteriological
evidence of contamination after normal disinfecting evidence of contamination after normal disinfecting
procedures. procedures.
b. Pipelines, valves, pumps, etc., that have been b. Pipelines, valves, pumps, etc., that have been
dismantled, repaired or replaced. dismantled, repaired or replaced.
c. Tanks which have been entered. c. Tanks which have been entered.
d. New or contaminated hoses.d. New or contaminated hoses.

34. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
To chemically disinfect a system, the following steps are required: To chemically disinfect a system, the following steps are required:
a. Introduce sufficient chemical into the tanks to provide at least 100 a. Introduce sufficient chemical into the tanks to provide at least 100
ppm FAC (Use Chlorine Dosage Calculator). ppm FAC (Use Chlorine Dosage Calculator).
b. Fill tanks with water. b. Fill tanks with water.
c. All equipment including pumps, valves, lines, and hoses that have c. All equipment including pumps, valves, lines, and hoses that have
been used to carry polluted water must be included in this process been used to carry polluted water must be included in this process
in order to disinfect the entire system. Using the ship's pumps, in order to disinfect the entire system. Using the ship's pumps,
chlorinated water must be drained from each outlet to ensure that all chlorinated water must be drained from each outlet to ensure that all
the contaminated parts of the system are subjected to this the contaminated parts of the system are subjected to this
treatment. treatment.
d. The FAC residual after four hours contact time within the tanks d. The FAC residual after four hours contact time within the tanks
and system must be not less than 50 ppm and must be tested at and system must be not less than 50 ppm and must be tested at
hourly intervals to ensure maintenance of the proper FAC. If at any hourly intervals to ensure maintenance of the proper FAC. If at any
time during this period the FAC residual falls below 50 ppm, chlorine time during this period the FAC residual falls below 50 ppm, chlorine
must be added to bring the residual to 100 ppm and the four-hour must be added to bring the residual to 100 ppm and the four-hour
period started again. period started again.

35. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
e. Water should be pumped out of the lowest e. Water should be pumped out of the lowest
opening in the tanks, through the contaminated opening in the tanks, through the contaminated
lines, pumps, and valves and returned to the lines, pumps, and valves and returned to the
tank.tank.
When more than one tank is to be chemically When more than one tank is to be chemically
disinfected, the highly chlorinated water from the disinfected, the highly chlorinated water from the
first tank should be reused in disinfecting other first tank should be reused in disinfecting other
polluted tanks (additional chlorine must be polluted tanks (additional chlorine must be
added to maintain desired residual until all have added to maintain desired residual until all have
been treated). been treated).

36. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Alternate ProcedureAlternate Procedure
a. Thoroughly clean and rinse the tank. a. Thoroughly clean and rinse the tank.
b. Swab all surfaces of the tank with a solution of 100 ppm chlorine, b. Swab all surfaces of the tank with a solution of 100 ppm chlorine,
or pump the solution through hoses, and apply to all surfaces of the or pump the solution through hoses, and apply to all surfaces of the
tank. Adequate personal protective measures and respirators must tank. Adequate personal protective measures and respirators must
be used. be used.
Chlorine at 100 ppm may generate vapors that are dangerous to Chlorine at 100 ppm may generate vapors that are dangerous to
personnel working in these tanks. Entry into these tanks must be personnel working in these tanks. Entry into these tanks must be
authorized by the gas free engineer. authorized by the gas free engineer.
c. Strip all water used for super chlorination from the tank. c. Strip all water used for super chlorination from the tank.
d. Allow eight hours to dry; forced ventilation may be necessary. d. Allow eight hours to dry; forced ventilation may be necessary.
e. Rinse with potable water, and the tank is ready for use. FAC e. Rinse with potable water, and the tank is ready for use. FAC
residual of at least 2.0 ppm must be maintained in water transported residual of at least 2.0 ppm must be maintained in water transported
and stored in these tanks.and stored in these tanks.

37. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Disinfection of Potable Disinfection of Potable
Water HosesWater Hoses
Potable water hoses are disinfected by filling with a solution Potable water hoses are disinfected by filling with a solution
containing not less than 100 ppm FAC. containing not less than 100 ppm FAC.
The solution must be in con-tact with the entire internal The solution must be in con-tact with the entire internal
surface of the hose for not less than two minutes. surface of the hose for not less than two minutes.
Flush 30-60 seconds with potable water prior to use.Flush 30-60 seconds with potable water prior to use.
Prior to connecting the potable water to either the ship riser or Prior to connecting the potable water to either the ship riser or
the shore source the interior of the fittings must be disinfected the shore source the interior of the fittings must be disinfected
by not less than 2 minutes contact with a solution of 100 ppm by not less than 2 minutes contact with a solution of 100 ppm
FAC.FAC.
The shore water source should be flushed to waste 15-30 The shore water source should be flushed to waste 15-30
seconds prior to hookup of the water hose.seconds prior to hookup of the water hose.

38. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Emergency Drinking WaterEmergency Drinking Water
If potable water is not available during an emergency, it may If potable water is not available during an emergency, it may
be necessary to treat poor quality water for drinking and be necessary to treat poor quality water for drinking and
cooking purposes. cooking purposes.
Before this water can be used, it must be chlorinated Before this water can be used, it must be chlorinated
initially to at least 5.0 ppm FAC with a final residual of at initially to at least 5.0 ppm FAC with a final residual of at
least 2.0 ppm FAC after a 30 minute contact time.least 2.0 ppm FAC after a 30 minute contact time.
Water can also be made safe by holding at a rolling boil Water can also be made safe by holding at a rolling boil
for two minutes; however, it would be inconvenient to for two minutes; however, it would be inconvenient to
boil adequate quantities of water. If the water is boil adequate quantities of water. If the water is
excessively contaminated or turbid (muddy), excessively contaminated or turbid (muddy),
consideration should be given to the use of canned or consideration should be given to the use of canned or
other emergency drinking water sources.other emergency drinking water sources.

39. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Chlorine Dosage CalculatorChlorine Dosage Calculator
The figures on the following chart give the "dosage rate" for The figures on the following chart give the "dosage rate" for
chlorination. The quality of water, e.g., the organic and chlorination. The quality of water, e.g., the organic and
inorganic materials present, will affect the final chlorine inorganic materials present, will affect the final chlorine
residual. residual.
The amount of chlorine required to react with and be The amount of chlorine required to react with and be
absorbed by these materials is called the "chlorine demand." absorbed by these materials is called the "chlorine demand."
The chlorine absorbed or neutralized has no disinfectant The chlorine absorbed or neutralized has no disinfectant
value, so it is necessary to add enough chlorine (adequate value, so it is necessary to add enough chlorine (adequate
dosage rate) to satisfy the "chlorine demand" and still provide dosage rate) to satisfy the "chlorine demand" and still provide
FAC. FAC.
The FAC is the active disinfecting agent and is the chlorine The FAC is the active disinfecting agent and is the chlorine
reading determined with the colorimetric test kit. reading determined with the colorimetric test kit.

40. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
Select desired parts per million. Determine strength of Select desired parts per million. Determine strength of
material to be used. Compute number of gallons to be material to be used. Compute number of gallons to be
chlorinated. Read across to obtain quantity of material to be chlorinated. Read across to obtain quantity of material to be
used. used.
The 5% and 10% listings are liquid sodium hypochlorite; thus, The 5% and 10% listings are liquid sodium hypochlorite; thus,
the measurements are expressed as volume. the measurements are expressed as volume.
The 65 to 70% listings are granular calcium hypochlorite; The 65 to 70% listings are granular calcium hypochlorite;
thus, the measurements are expressed as weight.thus, the measurements are expressed as weight.
The standard 2 1/2" water hose has a volume of 0.25 gallons The standard 2 1/2" water hose has a volume of 0.25 gallons
per foot of hose. This figure may be used in determining the per foot of hose. This figure may be used in determining the
volume of a hose for disinfecting purposes. volume of a hose for disinfecting purposes.

41. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
As a rough calculation, a dosage rate of 1 As a rough calculation, a dosage rate of 1
ounce of calcium hypochlorite (65 to 70%) per ounce of calcium hypochlorite (65 to 70%) per
5,000 gallons yields 1.0 ppm. 5,000 gallons yields 1.0 ppm.
Because of chlorine demand, this dosage rate Because of chlorine demand, this dosage rate
will probably produce a FAC residual of about will probably produce a FAC residual of about
0.2 ppm after a 30-minute contact period.0.2 ppm after a 30-minute contact period.

42. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
5% Liquid Sodium Hypochlorite5% Liquid Sodium Hypochlorite
PPMPPM 11 55 2525 5050 100100 200200
Quantity Quantity
Gal Gal
. .
50,00050,000 1 Gal. 1 Gal. 5 Gal. 5 Gal. 25 Gal.25 Gal. 50 Gal50 Gal 100 Gal.100 Gal. 200 Gal.200 Gal.
25,00025,000 2 Qt2 Qt 10 Qt10 Qt 50 Qt50 Qt 25 Gal25 Gal 50 Gal50 Gal 100 Gal100 Gal
10,00010,000 26 Oz.26 Oz. 1 Gal. 1 Gal. 5 Gal. 5 Gal. 10 Gal. 10 Gal. 10 Gal. 10 Gal. 10 Gal. 10 Gal.
5,0005,000 13 Oz. 13 Oz. 2 Qt 2 Qt 10 Qt 10 Qt 20 Gal. 20 Gal. 20 Gal. 20 Gal. 20 Gal. 20 Gal.
2,0002,000 6 Oz6 Oz 26 Oz. 26 Oz. 1 Gal. 1 Gal. 40 Gal. 40 Gal. 40 Gal. 40 Gal. 40 Gal. 40 Gal.
1,0001,000 3 Oz. 3 Oz. 13 Oz. 13 Oz. 2 Qt 2 Qt 5 Gal. 5 Gal. 5 Gal. 5 Gal. 5 Gal. 5 Gal.
500500 2 Oz. 2 Oz. 7 Oz. 7 Oz. 1 Qt 1 Qt 10 Gal. 10 Gal. 10 Gal. 10 Gal. 10 Gal. 10 Gal.
200200 1 Tbsp 1 Tbsp 3 Oz. 3 Oz. 13 Oz. 13 Oz. 20 Gal. 20 Gal. 20 Gal. 20 Gal. 20 Gal. 20 Gal.
100100 2 Tsp2 Tsp 2 Oz.2 Oz. 7 Oz. 7 Oz. 2 Gal. 2 Gal. 2 Gal. 2 Gal. 2 Gal. 2 Gal.
5050 1 Tsp1 Tsp 1 Oz. 1 Oz. 4 Oz. 4 Oz. 4 Gal. 4 Gal. 4 Gal. 4 Gal. 4 Gal. 4 Gal.
2525 1 Tbsp 1 Tbsp 2 Oz. 2 Oz. 8 Gal. 8 Gal. 8 Gal. 8 Gal. 8 Gal. 8 Gal.
1010 1 Oz. 1 Oz. 1 Gal. 1 Gal. 1 Gal. 1 Gal. 1 Gal. 1 Gal.
55 1 Tsp 1 Tsp 2 Gal. 2 Gal. 2 Gal. 2 Gal. 2 Gal. 2 Gal.

43. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
10% Liquid Sodium Hypochlorite10% Liquid Sodium Hypochlorite
PPMPPM 11 55 2525 5050 100100 200200
Quantity Quantity
(Gal)(Gal)
50,00050,000 2 Qt. 2 Qt. 10 Qt. 10 Qt. 50 Qt. 50 Qt. 25 Gal. 25 Gal. 50 Gal. 50 Gal. 100 Gal. 100 Gal.
25,00025,000 1 Qt. 1 Qt. 5 Qt. 5 Qt. 25 Qt. 25 Qt. 50 Qt. 50 Qt. 25 Gal. 25 Gal. 50 Gal. 50 Gal.
10,00010,000 13 Oz. 13 Oz. 2 Qt. 2 Qt. 10 Qt. 10 Qt. 5 Gal. 5 Gal. 10 Gal. 10 Gal. 20 Gal. 20 Gal.
5,0005,000 7 Oz. 7 Oz. 1 Qt. 1 Qt. 5 Qt. 5 Qt. 10 Qt. 10 Qt. 5 Gal. 5 Gal. 10 Gal. 10 Gal.
2,0002,000 3 Oz. 3 Oz. 13 13 2 Qt. 2 Qt. 1 Gal. 1 Gal. 2 Gal. 2 Gal. 4 Gal. 4 Gal.
1,0001,000 1.5 Oz. 1.5 Oz. 7 Oz. 7 Oz. 1 Qt. 1 Qt. 2 Qt. 2 Qt. 1 Gal. 1 Gal. 2 Gal. 2 Gal.
500500 1 Oz. 1 Oz. 4 Oz. 4 Oz. 1 pt. 1 pt. 1 Qt. 1 Qt. 2 Qt. 2 Qt. 1 Gal. 1 Gal.
200200 2 tsp. 2 tsp. 2 Oz. 2 Oz. 7 Oz. 7 Oz. 13 Oz. 13 Oz. 26 Oz. 26 Oz. 55 Oz. 55 Oz.
100100 1 tsp. 1 tsp. 1 Oz. 1 Oz. 4 Oz. 4 Oz. 7 Oz. 7 Oz. 13 Oz. 13 Oz. 26 Oz. 26 Oz.
5050 .5 Oz. .5 Oz. 2 Oz. 2 Oz. 4 Oz. 4 Oz. 7 Oz. 7 Oz. 13 Oz. 13 Oz.
2525 2 tsp. 2 tsp. 1 Oz. 1 Oz. 2 Oz. 2 Oz. 4 Oz. 4 Oz. 7 Oz. 7 Oz.
1010 1 tsp. 1 tsp. 2 Oz. 2 Oz. 3 Oz. 3 Oz.
55 1 Oz. 1 Oz. 2 Oz. 2 Oz.

44. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
65 to 70% Granular Calcium Hypochlorite65 to 70% Granular Calcium Hypochlorite
PPMPPM 11 55 2525 5050 100100 200200
Quantity Quantity
(Gal) (Gal)
50,000 50,000 10 Oz. 10 Oz. 3 lb. 3 lb. 15 lb. 15 lb. 30 lb. 30 lb. 59 lb. 9 Oz. 59 lb. 9 Oz. 119 lb.119 lb. 4 4
Oz. Oz.
25,000 25,000 5 Oz. 5 Oz. 24 Oz. 24 Oz. 7.5 lb. 7.5 lb. 15 lb. 15 lb. 29 lb.12 29 lb.12
Oz. Oz.
59.5 lb. 59.5 lb.
10,000 10,000 2 Oz. 2 Oz. 10 Oz. 10 Oz. 3 lb. 3 lb. 6 lb. 6 lb. 12 lb. 12 lb. 23 lb. 13 23 lb. 13
Oz. Oz.
5,000 5,000 1 Oz. 1 Oz. 5 Oz. 5 Oz. 1.5 lb. 1.5 lb. 3 lb. 3 lb. 6 lb. 6 lb. 11 lb. 15 11 lb. 15
Oz. Oz.
2,000 2,000 2 Oz. 2 Oz. 10 Oz. 10 Oz. 19 Oz. 19 Oz. 3 lb. 3 lb. 4 lb.13 Oz. 4 lb.13 Oz.
1,000 1,000 1 Oz. 1 Oz. 5 Oz. 5 Oz. 10 Oz. 10 Oz. 20 Oz. 20 Oz. 2 lb. 7 Oz. 2 lb. 7 Oz.
500 500 3 Oz. 3 Oz. 5 Oz. 5 Oz. 10 Oz. 10 Oz. 19 Oz. 19 Oz.
200 200 1 Oz. 1 Oz. 2 Oz. 2 Oz. 4 Oz. 4 Oz. 8 Oz. 8 Oz.
100 100 1 Oz. 1 Oz. 2 Oz. 2 Oz. 4 Oz. 4 Oz.
50 50 1 Oz. 1 Oz. 2 Oz. 2 Oz.
25 25 1 Oz. 1 Oz.

45. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Required Halogen ResidualsRequired Halogen Residuals
TX RequiredTX Required Chlorination Dosage and Time Chlorination Dosage and Time
Requirements (FAC) Requirements (FAC)
Bromination Dosage and Time Bromination Dosage and Time
Requirements (TBR) Requirements (TBR)
1. Minimum residual required for 1. Minimum residual required for
potable water produced onboard or potable water produced onboard or
obtained from an approved sourceobtained from an approved source
0.2 ppm after 30 minutes in tanks 0.2 ppm after 30 minutes in tanks 0.2 ppm after 30 minutes in tanks 0.2 ppm after 30 minutes in tanks
2. Water from area where amebiasis 2. Water from area where amebiasis
or hepatitis is endemic or unapproved or hepatitis is endemic or unapproved
source is usedsource is used
2.0 ppm after 30 minutes in tanks 2.0 ppm after 30 minutes in tanks 2.0 ppm after 30 minutes in tanks 2.0 ppm after 30 minutes in tanks
3. Water in potable water distribution 3. Water in potable water distribution
system system
*Trace readings throughout *Trace readings throughout * Trace readings throughout * Trace readings throughout
4. Disinfecting tanks and system 4. Disinfecting tanks and system 100 ppm initially; 50 ppm after 4 hr 100 ppm initially; 50 ppm after 4 hr Not applicable Not applicable
5. Disinfecting hoses, couplings, and 5. Disinfecting hoses, couplings, and
water connections prior to connection water connections prior to connection
to potable water system. to potable water system.
100 ppm for 2 min. 100 ppm for 2 min. Not applicable Not applicable
6. Scrubbing interior of contaminated 6. Scrubbing interior of contaminated
tanks when potable water is scarce tanks when potable water is scarce
100 ppm 100 ppm Not applicable Not applicable
7. Emergency water supply for 7. Emergency water supply for
drinking and cooking. drinking and cooking.
5.0 ppm after 30 minutes 5.0 ppm after 30 minutes Not applicable Not applicable
8. Fuel cargo tanks converted to carry 8. Fuel cargo tanks converted to carry
cargo water. cargo water.
2.0 ppm at destination 2.0 ppm at destination Not applicable Not applicable

46. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
SubmarinesSubmarines
Are exempted from routinely halogenating potable water supplies Are exempted from routinely halogenating potable water supplies
while at sea. while at sea.
If there is evidence of contamination of the potable water supply, it If there is evidence of contamination of the potable water supply, it
must be chlorinated using calcium hypochlorite (HTH) 65 to 70% must be chlorinated using calcium hypochlorite (HTH) 65 to 70%
until a residual of 0.2 ppm FAC is obtained after a 30-minute contact until a residual of 0.2 ppm FAC is obtained after a 30-minute contact
time. time.
The calcium hypochlorite must be sealed in plastic bags and stored The calcium hypochlorite must be sealed in plastic bags and stored
only in a medical instrument box, plastic rigid, size 9 1/2x 9 x 7 only in a medical instrument box, plastic rigid, size 9 1/2x 9 x 7
inches, NSN 6545-00131-6992. The case must be painted white inches, NSN 6545-00131-6992. The case must be painted white
and labeled "HAZARDOUS MATERIAL, CALCIUM and labeled "HAZARDOUS MATERIAL, CALCIUM
HYPOCHLORITE"HYPOCHLORITE" in red letters. The case must be vented at the in red letters. The case must be vented at the
bottom and be stored in any area away from engineering spaces. bottom and be stored in any area away from engineering spaces.
Each bottle of calcium hypochlorite must be inspected prior to Each bottle of calcium hypochlorite must be inspected prior to
deployment or at least every three months. Bottles with deteriorated deployment or at least every three months. Bottles with deteriorated
seals must be discarded and replaced. seals must be discarded and replaced.

47. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
SubmarinesSubmarines
Bacteriological examination must be performed weekly Bacteriological examination must be performed weekly on a mini-on a mini-
mum of four samples representative of the distribution system. mum of four samples representative of the distribution system.
The current method of analysis is theThe current method of analysis is the test for total coliform, using the test for total coliform, using the
membrane filter technique (MF); however, the multiple tube membrane filter technique (MF); however, the multiple tube
fermentation technique (MTF), the Presence-Absence Coliform Test fermentation technique (MTF), the Presence-Absence Coliform Test
(PA) and the Minimal Media ONPG-MUG Test may be used if (PA) and the Minimal Media ONPG-MUG Test may be used if
desired. desired.
The results of all testing will be reported as "presence" or "absence." The results of all testing will be reported as "presence" or "absence."
Daily halogen residuals will be performed and recorded while in port using Daily halogen residuals will be performed and recorded while in port using
a shore water supply.a shore water supply.
The Medical Department Representative will maintain a water log The Medical Department Representative will maintain a water log
and enter water source, date, bacteriological testing and any and enter water source, date, bacteriological testing and any
disinfection procedure used, and halogen readings if accomplished. disinfection procedure used, and halogen readings if accomplished.

48. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Temporary Water ShipsTemporary Water Ships
To convert tanks commonly used for other liquids for To convert tanks commonly used for other liquids for
transporting potable water in emergency situations.transporting potable water in emergency situations.
Select and disinfect tanks.Select and disinfect tanks.
Must be inspected by engineering personnel Must be inspected by engineering personnel
After inspection of all tanks, the appropriate Type After inspection of all tanks, the appropriate Type
Commander should decide on the approval or Commander should decide on the approval or
disapproval of these tanks for transporting and disapproval of these tanks for transporting and
storage of potable water.storage of potable water.

49. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Emergency Water SuppliesEmergency Water Supplies
Battle Dressing StationsBattle Dressing Stations..
Built-in potable water storage tanks of sufficient size in battle Built-in potable water storage tanks of sufficient size in battle
dressing stations to provide an alternate source of water in dressing stations to provide an alternate source of water in
emergency situations.emergency situations.
The tanks are designed are isolated from the main potable The tanks are designed are isolated from the main potable
water system. water system.
Once each quarter must be drained and refilled with potable Once each quarter must be drained and refilled with potable
water containing a trace halogen residual.water containing a trace halogen residual.
At least every three years, must be opened and inspected for At least every three years, must be opened and inspected for
evidence of sludge or foreign material. evidence of sludge or foreign material.

50. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Emergency Water SuppliesEmergency Water Supplies
Based on the results of this visual inspection, it maybe Based on the results of this visual inspection, it maybe
necessary to thoroughly clean the interior of the tank. necessary to thoroughly clean the interior of the tank.
A new gasket may be required each time the tank is opened for A new gasket may be required each time the tank is opened for
inspection. inspection.
These tanks must be disinfected each time they are opened.These tanks must be disinfected each time they are opened.
Bacteriological analysis must be performed after filling and Bacteriological analysis must be performed after filling and
monthly thereafter.monthly thereafter.
If this analysis indicates a tank is contaminated, the tank must If this analysis indicates a tank is contaminated, the tank must
be opened, inspected, cleaned, if necessary, and disinfected.be opened, inspected, cleaned, if necessary, and disinfected.

51. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
5 Gallon Containers5 Gallon Containers
Used in small ships.Used in small ships.
There are two types 5-gallon containers; one is of a heavy There are two types 5-gallon containers; one is of a heavy
gauge plastic type material and the other is metal.gauge plastic type material and the other is metal.
Under no circumstances will 5-gallon containers previously Under no circumstances will 5-gallon containers previously
used for gasoline or other petroleum products be used.used for gasoline or other petroleum products be used.
Carefully examine the containers to insure the containers have Carefully examine the containers to insure the containers have
not been used for any purpose other than the storage of potable not been used for any purpose other than the storage of potable
water.water.
Each container shall have the word “WATER” either Each container shall have the word “WATER” either
embossed or painted on the exterior surfaceembossed or painted on the exterior surface in letters at least in letters at least
0.25 inches high.0.25 inches high.

52. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
5 Gallon Containers5 Gallon Containers
Manual washing is accomplished with warm water Manual washing is accomplished with warm water
(110-125°F) F), the recommended amount of (110-125°F) F), the recommended amount of
approved hand dishwashing detergent, and a suitable approved hand dishwashing detergent, and a suitable
long-handled, slender brush. long-handled, slender brush.
Disinfect by exposure to a chemical disinfectant Disinfect by exposure to a chemical disinfectant
solution for at least two minutes. solution for at least two minutes.
Approved chemical disinfectants for these containers Approved chemical disinfectants for these containers
include: calcium/sodium hypochlorite, chlorine-include: calcium/sodium hypochlorite, chlorine-
iodine type disinfectant (food service), or liquid iodine type disinfectant (food service), or liquid
iodine (25 ppm).iodine (25 ppm).

53. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
5 Gallon Containers5 Gallon Containers
Must contain a trace FAC or TBR.Must contain a trace FAC or TBR.
Each can must be labeled with date of filling and Each can must be labeled with date of filling and
source of the potable water.source of the potable water.
Store in a clean dry place in the immediate vicinity of Store in a clean dry place in the immediate vicinity of
anticipated use (battle dressing station without anticipated use (battle dressing station without
emergency potable water tanks).emergency potable water tanks).
Must be emptied, flushed and refilled with potable Must be emptied, flushed and refilled with potable
water containing a trace FAC or TBR every 3 water containing a trace FAC or TBR every 3
months.months.

54. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Canned WaterCanned Water
The exterior inspection of canned drinking water is conducted The exterior inspection of canned drinking water is conducted
by Medical Department at least quarterly.by Medical Department at least quarterly.
Examine general appearance, dents and rust.Examine general appearance, dents and rust.
Cans having dents which cross the ends or side seams, or Cans having dents which cross the ends or side seams, or
which crinkle the metal to a point should not be used. which crinkle the metal to a point should not be used.
Rusted cans may be used provided the rust does not penetrate Rusted cans may be used provided the rust does not penetrate
the can; rust that can be wiped off is not penetrating.the can; rust that can be wiped off is not penetrating.
Any containers that exhibit evidence of leakage or are severely Any containers that exhibit evidence of leakage or are severely
distorted must be re-placed.distorted must be re-placed.
The interior inspection is a Supply Department responsibility The interior inspection is a Supply Department responsibility
which should be performedwhich should be performed approximately every two years.approximately every two years.

55. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Evaluation Of Taste Evaluation Of Taste
or Odor Problemsor Odor Problems
Caused by:Caused by:
Cross-connections with non-potable systems.Cross-connections with non-potable systems.
Leaks in common bulkheads between potable water tanks and Leaks in common bulkheads between potable water tanks and
fuel tanks, ballast tanks, bilges, and wastewater tanks.fuel tanks, ballast tanks, bilges, and wastewater tanks.
Leaks in non-potable piping through water tanks.Leaks in non-potable piping through water tanks.
Improper disposal of chemicals or liquids through potable Improper disposal of chemicals or liquids through potable
water-sounding tubes.water-sounding tubes.
Utilization of potable water hoses for non-potable liquids.Utilization of potable water hoses for non-potable liquids.
Excessive storage time of water in tanks.Excessive storage time of water in tanks.

56. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Evaluation Of Taste Evaluation Of Taste
or Odor Problemsor Odor Problems
Improper distillation processes in harbors which are Improper distillation processes in harbors which are
contaminated with industrial or biological wastes.contaminated with industrial or biological wastes.
Inadequate disinfection procedures Inadequate disinfection procedures
Transfer of water from shore facilities or barges which have Transfer of water from shore facilities or barges which have
taste and odor problems.taste and odor problems.
Potable water tanks used for ballast or other liquids, and not Potable water tanks used for ballast or other liquids, and not
cleaned or disinfected properly.cleaned or disinfected properly.
Deteriorated or improperly applied tank coatings.Deteriorated or improperly applied tank coatings.
Distilling plants producing potable water while stripping JP-5 Distilling plants producing potable water while stripping JP-5
tanks, pumping oily bilges overboard forward of the distilling tanks, pumping oily bilges overboard forward of the distilling
plant feed pumps suction or when in close proximity to other plant feed pumps suction or when in close proximity to other
ships.ships.

57. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
InvestigationInvestigation
Date and timeDate and time
Water sourceWater source
Characteristic Characteristic
Taste/odorTaste/odor
LocationLocation
Continuous or Continuous or
particular tank on-lineparticular tank on-line
Halogen ResidualsHalogen Residuals
HistoryHistory
Water LogWater Log
Tanks and pipingTanks and piping
Disinfection Disinfection
Repairs/MaintenanceRepairs/Maintenance
In PortIn Port
Testing before filling Testing before filling

58. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ResultsResults
If not able to identify a source of the taste and odor If not able to identify a source of the taste and odor
should add sufficient chlorine to provide a dosage of should add sufficient chlorine to provide a dosage of
5 ppm in the potable water tanks, with the intent of 5 ppm in the potable water tanks, with the intent of
providing 2.0 ppm free residual chlorine in the water providing 2.0 ppm free residual chlorine in the water
distribution system. (temporary)distribution system. (temporary)
Contact the NAVENPVNTMEDU via the command Contact the NAVENPVNTMEDU via the command
medical officer for technical assistance. medical officer for technical assistance.

59. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Cross-connectionCross-connection
Any connection between two separate piping Any connection between two separate piping
systems, one of which contains potable water, and the systems, one of which contains potable water, and the
other water of unknown or questionable quality or other water of unknown or questionable quality or
some other substance.some other substance.
This condition may result in the flow of liquid from This condition may result in the flow of liquid from
one system to the other, resulting in contamination.one system to the other, resulting in contamination.
Medical Department Representatives should routinely Medical Department Representatives should routinely
observe for cross-connectionsobserve for cross-connections

60. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Cross-connectionCross-connection
Contact the Engineering Department, review the Contact the Engineering Department, review the
suspected site and ship diagrams.suspected site and ship diagrams.
The primary responsibility of the Medical The primary responsibility of the Medical
Department is to prevent a disease outbreak from Department is to prevent a disease outbreak from
occurring.occurring.
Therefore, recommendations to secure the affected Therefore, recommendations to secure the affected
part of the potable water system would be appropriate part of the potable water system would be appropriate
until such time the cross-connection is eliminated and until such time the cross-connection is eliminated and
the potable water system disinfected, if necessary.the potable water system disinfected, if necessary.

61. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
IceIce
ManufactureManufacture
Accomplished with ice cube Accomplished with ice cube
machines or ice makers in machines or ice makers in
most instances. most instances.
Must be prepared from Must be prepared from
potable water in order to potable water in order to
reduce bacterial growth.reduce bacterial growth.
Use the scoop, wash, rinse, Use the scoop, wash, rinse,
and sanitize at least daily.and sanitize at least daily.
TestingTesting
Samples of ice must be Samples of ice must be
collected from ¼ of the ice collected from ¼ of the ice
machines weekly for machines weekly for
bacteriological examination.bacteriological examination.
If samples are positive for If samples are positive for
coliform organisms, the coliform organisms, the
storage bin should be storage bin should be
emptied, cleaned and emptied, cleaned and
disinfected.disinfected.
Enter results on the potable Enter results on the potable
water log.water log.

62. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Water TestingWater Testing
Engineer Department Engineer Department
PH- PH- High pH levels (8.5 or above) will adversely affect High pH levels (8.5 or above) will adversely affect
the disinfectant properties of chlorine or bromine.the disinfectant properties of chlorine or bromine.
Temperature- affects the amount of bromine that is Temperature- affects the amount of bromine that is
released from the cartridge and high temperatures may released from the cartridge and high temperatures may
rapidly affect with cartridge use.rapidly affect with cartridge use.
Salinity- When operating in sea water, the chloride Salinity- When operating in sea water, the chloride
content of water from a distilling plant shall be at or content of water from a distilling plant shall be at or
below 0.065 equivalent per million(epm), 0.25 grains of below 0.065 equivalent per million(epm), 0.25 grains of
sea-salt per gallon or less than 2.3 ppm.sea-salt per gallon or less than 2.3 ppm.

63. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Halogen ResidualsHalogen Residuals
Medical DepartmentMedical Department
Prior to receiving potable water onboard.Prior to receiving potable water onboard.
In conjunction with each potable water sample collected for In conjunction with each potable water sample collected for
bacteriological analysis.bacteriological analysis.
Daily, from sampling points that are varied and are Daily, from sampling points that are varied and are
representative of the ship’s distribution system (i.e., forward, representative of the ship’s distribution system (i.e., forward,
midships, aft, below deck, and in the superstructure).midships, aft, below deck, and in the superstructure).
The number of samples required will be determined by the The number of samples required will be determined by the
size of the ship; no less than four samples will be collected.size of the ship; no less than four samples will be collected.

64. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Halogen ResidualsHalogen Residuals
On DD, DDG, FFG, LST, MSO, and other ships with On DD, DDG, FFG, LST, MSO, and other ships with
complements below 500-complements below 500-
4 samples are required4 samples are required
On LPH, LHA, LSD, and other ships with On LPH, LHA, LSD, and other ships with
complements over 500 and below 4,000-complements over 500 and below 4,000-
8 samples are required 8 samples are required
On CV, CVN, and other ships with complements On CV, CVN, and other ships with complements
above 4,000-above 4,000-
12 samples are required12 samples are required

65. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
DPD TestDPD Test
(diethyl-p-phenylene diamine)(diethyl-p-phenylene diamine)
Open tap and let flow not less than 2 or 3 minutes.Open tap and let flow not less than 2 or 3 minutes.
Rinse the test tube with the water to be tested.Rinse the test tube with the water to be tested.
Fill test tube with sample water to the marked line (10 ml).Fill test tube with sample water to the marked line (10 ml).
Add one DPD No. 1 tablet, cap the test tube, and shake to Add one DPD No. 1 tablet, cap the test tube, and shake to
dissolve.dissolve.
REMOVE THE CAP FROM THE TEST TUBE and REMOVE THE CAP FROM THE TEST TUBE and
immediately compare the test sample color with the color immediately compare the test sample color with the color
standards in the comparator. Color matching should be standards in the comparator. Color matching should be
completed within sixty seconds after addition of the DPD No. completed within sixty seconds after addition of the DPD No.
1 tablet. 1 tablet.

66. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
DPD TestDPD Test
(diethyl-p-phenylene diamine)(diethyl-p-phenylene diamine)
Record the value of the matching color standard. If Record the value of the matching color standard. If
the color falls between consecutive color standards, the color falls between consecutive color standards,
take an intermediate value.take an intermediate value.
If the color is deeper than 5.0 ppm chlorine or 11.0 If the color is deeper than 5.0 ppm chlorine or 11.0
ppm bromine color standard, add an additional DPD ppm bromine color standard, add an additional DPD
No. 1 tablet to obtain a full color response. No No. 1 tablet to obtain a full color response. No
formulation is required with the extra tablet; take a formulation is required with the extra tablet; take a
direct reading and record.direct reading and record.

67. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Coliform TestColiform Test
Microorganisms of the coliform group are Microorganisms of the coliform group are
indicators of fecal contamination.indicators of fecal contamination.
Membrane Filter TestMembrane Filter Test
Most ships will be equipped with a membrane Most ships will be equipped with a membrane
filter bacteriological testing kit.filter bacteriological testing kit.

68. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
Place about 2 ml M-Endo broth absorbent pad placed on Place about 2 ml M-Endo broth absorbent pad placed on
bottom half of petri dish.bottom half of petri dish.
Place sterile membrane filter on top of filter support.Place sterile membrane filter on top of filter support.
Clamp the funnel on top of filter support.Clamp the funnel on top of filter support.
Pour 100 ml of water sample into funnel. Apply suction to unit Pour 100 ml of water sample into funnel. Apply suction to unit
until water filters through.until water filters through.
Pour about 50 ml buffered water to rinse inside walls of Pour about 50 ml buffered water to rinse inside walls of
funnel. Apply suction to flush buffered water through funnel. Apply suction to flush buffered water through
membrane filter.membrane filter.
Dismantle funnel from filter support by removing clamp. Dismantle funnel from filter support by removing clamp.
Remove membrane filter.Remove membrane filter.

69. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
ProcedureProcedure
Place membrane filter on top of broth saturated Place membrane filter on top of broth saturated
absorbent pad. Avoid trapping air bubbles absorbent pad. Avoid trapping air bubbles
between filter and pan. Close the petri dish with between filter and pan. Close the petri dish with
its top.its top.
Invert the petri dish and place in incubator at 35° Invert the petri dish and place in incubator at 35°
C for 22 to 24 hours.C for 22 to 24 hours.
Observe for presence or absence of colonies with Observe for presence or absence of colonies with
greenish gold metallic sheen may be present only on greenish gold metallic sheen may be present only on
the center of the colony, only on the edge, or over the the center of the colony, only on the edge, or over the
entire colony.entire colony.

70. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water LogPotable Water Log
The Medical Department will maintain a two year The Medical Department will maintain a two year
chronological record of potable water surveillance. chronological record of potable water surveillance.
On larger ships, the preventive medicine technician On larger ships, the preventive medicine technician
should be responsible for entries.should be responsible for entries.
Use chronological order and must include:Use chronological order and must include:
Time and date each water sample was taken.Time and date each water sample was taken.

71. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water LogPotable Water Log
Location of the ship: at sea, in harbor, at Location of the ship: at sea, in harbor, at
anchorage, or in port; include the name of the anchorage, or in port; include the name of the
port.port.
Sampling site; include location of outlet, ice Sampling site; include location of outlet, ice
machine, emergency potable water tank or machine, emergency potable water tank or
supply, and identification number of potable supply, and identification number of potable
water tank, etc.water tank, etc.
Source of waterSource of water

72. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Potable Water LogPotable Water Log
Halogen and bacteriological testsHalogen and bacteriological tests
Any problems concerning taste and odor and Any problems concerning taste and odor and
their resolution.their resolution.
Inspection and surveys, include results, Inspection and surveys, include results,
discrepancies and action taken.discrepancies and action taken.

73. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Water Sanitation BillWater Sanitation Bill
Each ship should have a Water Sanitation Bill Each ship should have a Water Sanitation Bill
developed to meet the individual and unique aspects developed to meet the individual and unique aspects
of the individual ship’s conditions.of the individual ship’s conditions.
It is recommended that the Commanding Officer It is recommended that the Commanding Officer
promulgate the Water Sanitation Bill and that the bill promulgate the Water Sanitation Bill and that the bill
be posted conspicuously in areas where potable water be posted conspicuously in areas where potable water
and associated materials are processed, treated or and associated materials are processed, treated or
stored.stored.

74. NAVMED P-5010 Manual of Preventive MedicineNAVMED P-5010 Manual of Preventive Medicine
Any questions?Any questions?