Pmed2 CHT Of Wastewater

Question 1

What is the Navmed p-5010-7

Answer 1

Wastewater treatment and disposal

Question 2

Who’s responsibility is it to conduct visual inspection of marine sanitation devices (MSD) components as part of the routine habitability and sanitation inspections

Answer 2

MDR

Question 3

How often does medical perform training on wastewater hazards? What’s covered?

Answer 3

Periodically and during indoctrination.

Health hazards with human waste, proper hygiene necessary and correct cleaning procedures for disinfection of contaminated spaces

Question 4

Who must be present during cleanups and disinfection operations and provides on site advice when requested in the event of major sewage leaks or spills

Answer 4

MDR

Question 5

What has been installed on the majority of naval ships to help manage waste waters

Answer 5

Collection hold and transfer system (CHT)

Question 6

How many modes do CHT (collection hold and transfer) systems operate in

Answer 6

Three modes

Restricted waters
At sea
In port

Question 7

Who is required to be present during during clean-ups and disinfection operations involving food service spaces, living spaces and medical spaces?

Answer 7

MDR

Question 8

What type of CHT system do we use?

Answer 8

Type II-B Marine sanitation device

Question 9

What are elements of the Collection part of CHT

Answer 9

Soil drains or sewage (toilets or urinals)

Grey water drains (showers, laundries and galleys)

Diverted valves which direct the waste water over the side or to the holding tanks

Question 10

Hold elements of CHT

Answer 10

Tanks that retain sewage during transit of restricted water for eventual disposal.

NORMALLY SIZED 12 HOUR holding period depending on individual ship constraints

Question 11

Transfer elements of CHT

Answer 11

• Sewage pumps
• Overboard and deck connection discharge piping
• Associated diverter valves and deck valves
• Each tank has two sewage pumps which are conencted in parallel to discharge sewage and gray water to a recieving facility, ship waste off-loading barge (SWOB) or directly overboard.Split into two modes.

Question 12

What are the Two modes that sewage transfer pumps are equipped with?

Answer 12

Manual mode
- pumps are actuated independant of the level of wastewater in the tanks.
- Deactivates the pumps automatically when the low liquid level reaches 10% of tank volume to maintain PUMP SUCTION

Automatic Mode
-Low level stops pumps at 10% capacty to keep pumps PRIMED
- 80% capacity a visual and audible high level alarm is activated

Question 13

What safety hazard with sewage poses the greatest threat to ship and personnel?

Answer 13

Hydrogen Sulfide (H2S)

Question 14

When sewage is held in takes larger than 2000 gallons what must be done and why?

Answer 14

Aerated to prevent sewage becoming explosive

Question 15

What should all pump rooms be equipped with in case of improper ventilation emergencies?

Answer 15

two Emergency escape breathing devices EEBD (Good for 10 minutes)

Question 16

Who regularly inspects MSD components for LEAKS

Answer 16

Engineering personnel

Question 17

What test can you do to pinpoint small leaks from pumps or pipes systems for CHT standards?

Answer 17

Paper towel test

Question 18

Who must all leaks, spills, or other sources of contamination observed during engineering inspections be reported to?

Answer 18

Engineering officer

Executive Officer

SMDR

Question 19

What are some toxic or explosive gasses associated with CHT?

Answer 19

Hydrogen Sulfate (MOST DANGEROUS)

Methane

Ammonia

Carbon Dioxide

Question 20

What does Hydrogen Sulfate smell like?

Answer 20

Rotten eggs

Question 21

What immunizations do workers frequently exposed to wastewater need to have up to date?

Answer 21

Polio (IPV)

Tetanus Diptheria (Td)

Question 22

What are some PPE requirements for CHT workers?

Answer 22

Coveralls
Rubber boots
Rubber gloves
Face Shield
SCBA

Question 23

Where do you need to place all contaminated clothing after a cleanup operation? CHT

Answer 23

Placed in a plastic bag and laundered with hot soapy watery titties

Question 24

What safety procedures do you follow during a sewage spill?

Answer 24

NAVSHIPS TECHNICAL MANUAL chapter 593,

“POLLUTION CONTROL”

Question 25

Medical, food service and berthing spaces must be disinfected with what disinfectants and who approves them? How do you clean other spaces.

Answer 25

APPROVED EPA

Germacides two types
Phenolic type
Iodine Type

Other spaces are thoroughly washed down with water and detergent

Question 26

What do you do with bilges contaminated with sewage?

Answer 26

pumped out, washed with fire hose, pumped out again.

Question 27

Potable water supply suspected of sewage contamination, must be what?

Answer 27

Secured, disinfected and re-checked until water is determined to be safe.

Question 28

What are the color coding requirements for CHT within the ship?

Answer 28

Ships interior color is GOLD
-Valve handles
- Operating levers

Question 29

What color must the exterior deck discharge be for CHT?

Answer 29

Same color as surrounding structure

Question 30

Deck discharge stations must be clearly labelled with what?

Answer 30

Hose handling procedures

Sanitary health precautions

Question 31

How far from the US and territorial seas must you be to dump sewage?

Answer 31

3 Miles

Question 32

What are the three modes CHT is designed to operate in?

Answer 32

• At sea
  
  • Sewage and grey water including those in the hodling tanks are diverted/disharged overboard.
• In port
  
  • Sewage and grey water is collected in holding tanks and discharged into a sanitary sewer throu SEWER RISERS or ship off load barges (SWOB)
• In restricted waters
  
  • Sewage is collected and held in holding tanks
  • Grey water is discharged overboard via diverter valves

Question 33

What gas are we most concered with with CHT?

Answer 33

Hydrogen Sulfate