6.14 Manage CHT and Wastewater Surveillance Program

Question 1

What chapter of the P5010 is waste water?

Answer 1

Chapter 7

Question 2

Medical Department Responsibilities

Answer 2

visual inspection of Marine Sanitation Devices
Indoc of personnel (training periodic)
Provide on site advice
must be present during cleanups

Question 3

Three modes of CHT

Answer 3

Restricted waters
at sea
in port

Question 4

CHT system on most ships?

Answer 4

Type II-B MSD

Question 5

Collection element

Answer 5

soil drains or sewage from toilets
gray water drains
diverter valves

Question 6

Hold element

Answer 6

retain sewage during transit

- 12 hour holding period

Question 7

Transfer element

Answer 7

Sewage pumps

overboard and deck

Question 8

SWOB

Answer 8

Ship Waste Off Loading Barge (SWOB)

Question 9

Two types of transfer modes

Answer 9

Manual

automatic

Question 10

Manual transfer mode

Answer 10

activated independently

Question 11

Automatic transfer mode

Answer 11

low level stop pump at 10% (keeps primed)
30% signals duty pump
60% signals standby pump
80% visual and audible alarm activated

Question 12

Hydrogen Sulfide

Answer 12

poses the greatest danger to ships and personnel

Question 13

Gas can become what?

Answer 13

explosive

Question 14

H2S is heavier than

Answer 14

air

Question 15

pump rooms should have

Answer 15

slight negative pressure
ventilation indicator
two Emergency Escape Breathing Devices

Question 16

Who do all leaks, spills or other sources of contamination get reported to?

Answer 16

Engineering officer, Exectutive Officer, SMDR

Question 17

Toxic gases

Answer 17

Hydrogen sulfide
methane
ammonia
carbon dioxide

Question 18

What does hydrogen sulfide smell like?

Answer 18

rotten eggs

Question 19

Personnel who are in contact with wastewater must be current on which imms?

Answer 19

Polio

Tetanus Diptheria

Question 20

Required PPE

Answer 20

coveralls 
rubber boots
rubber gloves 
face shields 
SCBA

Question 21

How do you clean contaminated clothing?

Answer 21

hot water and soap for laundering

Question 22

Where are the safety procedures listed?

Answer 22

NAVSHIPS TECHNICAL MANUAL
CH 593
“POLLUTION CONTROL”

Question 23

Approved EPA disinfectants

Answer 23

germicides

• phenolic type
• iodine type

Question 24

What do you do if a bilges is contaminated?

Answer 24

sewage pumped out, washed down with a fire hose and pumped out again

Question 25

What do you do if potable water supply is contaminated?

Answer 25

must be secured
disinfected
rechecked until the water is determined safe

Question 26

Ships interior color for CHT systems

Answer 26

Gold

• valve handles
• operating levers

Question 27

Wastewater disposal procedures

Answer 27

overboard discharge of untreated sewage within US waters and territorial seas is PROHIBITED

Question 28

At sea

Answer 28

diverted or discharged overboard

Question 29

in port

Answer 29

discharged into a sanitary sewer through sewer risers or Ship Waste Off Load Barges (SWOB)

Question 30

In restricted waters

Answer 30

collected and stored in holding tanks

gray water is discharged overboard