Flashcards in NAVMED P-5010 CH 6 Deck (23):
Chief, BUMED is responsible for
establishing and promulgating health standards
for water quality afloat.
The Naval Facilities Engineering
Command (NAVFACENGCOM) is responsible
for promulgating instructions for ship-to-shore
potable water connections and for providing
potable water from an approved source when the
ship is berthed at a naval facilit
The Naval Sea Systems Command
(NAVSEASYSCOM) is responsible for the
design, construction, and maintenance of the
shipboard potable water systems, including
treatment facilities and processes to assure that
safe drinking water is available at all times.
The engineering officer is responsible for the
chloride and hydrogen ion (pH) testing of the
ship’s potable water.
The medical department representative
(MDR) is responsible for conducting a medical
surveillance program of the potable water
system including collection of samples for
coliform bacteria testing as prescribed and daily
halogen residuals from the distribution system.
Shipboard potable water primarily
comes from approved ashore sources and ships
water production plants which include distillation
plants or reverse osmosis (RO) plants.
Generally, ship water treatment plants
are capable of producing potable water from
bacteriologically contaminated seawater
Use of seawater in food services spaces
including sculleries is prohibited and seawater
outlets in these spaces must be removed.
Seawater is used aboard ships such as in
the fire mains, decontamination, and for marine
sanitation devices (MSDs) flushing
conditions require drastic restrictions in the use
of potable water, the allowances should not be
less than 2 gallons per man per day to be used
for drinking and cooking purposes
For new ship constructions, 50 gallons
per day per man is specified by NAVSEA for
Shipboard potable water risers shall be at
least 18 inches above the deck and turned down,
except when risers are located within the ship,
such as in submarines.
Distillation plants. Installed on
naval vessels are three general types, depending
on the source of heat used to evaporate
seawater: (a) Steam distilling plants are
operated by steam supplied directly or indirectly
from a power plant or auxiliary boiler. They are
subdivided into two groups, submerged type
and flash type. (b) Waste heat distilling plants are
submerged tube type and use heat derived from
diesel engine jacket water. (c) Vapor compression type distilling
plants require primarily only electrical
energy for operations
not exposed to the weather decks are fitted
with the flush-type manhole cover or the raised,
bolted-plate cover. The latter is preferable for
potable water tanks.
Filling connection hose valves must have
the potable water receiving connection at least 18
inches above the deck and turned down to protect
it from contamination
To avoid scald injuries, the temperature
setting for the hot water heaters serving habitability
space showers and lavatories must be set
not to exceed 120°F at the water tap.
The sounding tube cap will be color-coded dark blue.
On ships using steel tapes for sounding potable
water tanks, the tape handle must be color-coded
dark blue, labeled, or otherwise identified
“POTABLE WATER USE ONLY."
Valves for receiving or supplying potable
water must be conspicuously designated by a
warning plate bearing the inscription “POTABLE
WATER ONLY" in ¼ inch high letters
Potable water hoses must be labeled
“POTABLE WATER ONLY" with 1-inch high
letters approximately every 10 feet and the end
couplings painted dark blue
When not in use, potable water hoses
must be coupled or capped and stored in
designated lockers. The lockers must be vermin
proof, locked, and be elevated at least 18 inches
off the deck when located on weather decks and
National Primary Drinking Water Standards are
not applicable for shipboard potable water
systems, EPA has established a maximum
contaminant level (MCL) for all disinfectants at
Shipboard water is
disinfected by the addition of sufficient chlorine
or bromine to produce not less than 0.2 ppm FAC or TBR after 30 minutes contact time measured at
the potable water tank.
The individual bottles of HTH must be
sealed in plastic bags and stored only in a medical
instrument box, plastic rigid, size 9½ x 9 x 7
inches, The case must
be painted white and labeled: "HAZARDOUS
MATERIAL, CALCIUM HYPOCHLORITE" in
Each bottle of HTH shall be inspected
prior to deployment or at least every 3 months.
Bottles with deteriorated seals must be discarded
Any EPA approved method for bacteriological
testing may be used. Either Colilert® or
Colisure ® Tests are generally used for simplicity
considerations. The results of all testing will be
reported as "presence" or "absence."
Water transferred from the ship for
human consumption will contain 2.0 ppm FAC.
Water transferred from the ship for
human consumption will be absent of total and
fecal coliform bacteria.
analysis must be conducted no later than 1-week
prior to transfer.
Under no circumstances will 5-gallon
containers previously used for gasoline or other
petroleum products be used as emergency potable
water containers aboard ship.
Manual washing is accomplished with
warm water (110-125° F), the recommended
amount of approved food service dishwashing
detergent, and a suitable long-handled, slender
All interior surfaces shall be disinfected
by exposure to a chemical disinfectant solution
for at least 2 minutes.
ice cube trays for the manufacture of ice. Ice to
be used for food or drink and for chilling food
must be from a potable water source.
The ice scoop
shall be stored inside the machine on a bracket
above the maximum ice level or outside the ice
storage compartment with the handle up in a free
draining metal bracket.
The ice scoop is considered to be
food service equipment and, shall be washed,
rinsed, and sanitized at least daily
the permanent installation of ice scoops
with chains or other permanent attachments is not
Samples of ice shall be collected from
1/4 of the ice machines weekly for bacteriological
The engineering department is responsible
for testing chlorine or bromine residuals in the
potable water tanks after 30 minutes contact time.
DPD Test. This chlorine and bromine
comparator is read over two ranges, low range (0.1 - 1.0 ppm chlorine or 0.2 -
2.2 ppm bromine), and high range (2.0 - 10.0 ppm chlorine or
4.4 - 22.2 ppm bromine. The test sample tube
is moved from one position to another until a
color match is made.
Portable Spectrophotometer: battery operated, has the advantage for eliminating human visual subjectivity which occurs with traditional used color comparators kits.
approved method may be used. Generally Coliert
® or Colisure ® is used by the fleet.
Weekly ice samples must be collected
from one-fourth of the ice machines on a rotating
basis for bacteriological examination.
The bacteria that make up the biofilms
are collectively referred to as heterotrophic plate
count (HPC) organisms
method is designed to determine the density of
aerobic and facultatively anaerobic heterotrophic
bacteria in water.