explain the procedures and safety requirements of sewage system maintenance explain the...
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•Explain the Procedures and Safety Requirements of Sewage System Maintenance
•Explain the Requirements, Regulations and Procedures for MSD/CHT Tank Entry
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NSTM 593NSTM 593: Pollution Control: Pollution Control
NAVMED P-5010-7NAVMED P-5010-7: Wastewater Treatment : Wastewater Treatment & Disposal, Chapter 7& Disposal, Chapter 7
OPNAV 5100.19DOPNAV 5100.19D: NAVOSH Program : NAVOSH Program Manual Section C-15Manual Section C-15
Engineering Operating Sequencing System Engineering Operating Sequencing System (EOSS)(EOSS)
NSTM 074 VOL3 REV4
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USN POLLUTION DISCHARGE RESTRICTIONS DEVICE
• CHECK WITH OOD BEFORE DISCHARGING SEWAGE
• SHOWS RESTRICTIONS FOR SEWAGE, GREYWATER, HAZMAT, OILY WASTE
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•Equipment Designed to Prevent the Discharge of Untreated or Inadequately Treated Sewage
•A Fancy Way to Say “CHT System”
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•Collection, Holding and Transfer System
« Piping, Tanks, Pumps, Aeration Components
•Often Erroneously Used in Reference to Sewage, itself.
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EffluentEffluentFancy Name for “Sewage”
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•Serve “Gray Water”“Gray Water”
-Uncontaminated by Human Excrement (???)
•Sinks, Sculleries, Scuttlebutts, Showers
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Soil DrainsSoil Drains
•Serves “Serves “Black Water”
- Contaminated by Contaminated by Human ExcrementHuman Excrement
•Includes Commodes Includes Commodes and Urinals and Urinals
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ComminutorsComminutors
Macerator, Grinder Macerator, Grinder PumpPump
Motor Driven Grinder Used to Pulp or Liquify Solids Before they Enter CHT Tank
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Effluent Pump (Eddy Pump)
Pump for Pump for Discharging Discharging Sewage from the Sewage from the TankTank
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PREVENTION OF CLOGGED LINESPREVENTION OF CLOGGED LINES
• CLOG TRAPS
• INDOC. TRAINING
• POD NOTES
• WORKING PARTIES
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So Why Do We Have So Why Do We Have These Systems These Systems
Anyway???Anyway???
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HISTORYHISTORY
• Shipboard Sewage has Been Shipboard Sewage has Been Discharged Overboard for Discharged Overboard for CenturiesCenturies
• 19721972: CNO Policy Adopted : CNO Policy Adopted Requiring Installation of CHT Requiring Installation of CHT Systems Aboard Naval ShipsSystems Aboard Naval Ships
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HISTORYHISTORY•Design Goal: Provide Capacity to Hold Design Goal: Provide Capacity to Hold Sewage Generated over 12 Hours for large Sewage Generated over 12 Hours for large ships, 3 hours for small ships. ships, 3 hours for small ships.
• LPD-17 is looking at holding Gray Water LPD-17 is looking at holding Gray Water up to 36 hours.up to 36 hours.
•Sufficient Time to Transit 3 NM Sufficient Time to Transit 3 NM Restricted Zone…???Restricted Zone…???
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MODES OF MODES OF OPERATIONSOPERATIONS
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MODES OF OPERATIONINPORTINPORT
• Pier side, all waste and soil drains to tank, then to pier riser
WASTEWATER TREATMENT FACILITY ALAMEDA, CALIFORNIA
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MODES OF OPERATIONTRANSITTRANSIT
• Within 3 nm of coast:
• All Black Water diverted to tank
• Grey Water below W/L - to tank
• Grey Water above W/L - overboard
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MODES OF OPERATIONAT SEAAT SEA
• Beyond 3 nm:
- all Grey Water and Black Water overboard
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OVERSEAS DISPOSALOVERSEAS DISPOSALCHECK LOCAL PORT
REGULATIONS
• PIER
• BARGE
• TRUCK
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OVERSEAS DISPOSALOVERSEAS DISPOSALCHECK LOCAL PORT REGULATIONS
OVER THE SIDE
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Discharge Restriction Exemption
““Sewage Discharge Regulations Shall Sewage Discharge Regulations Shall Not Preclude Overboard Discharge Not Preclude Overboard Discharge When An Emergency Situation Exists When An Emergency Situation Exists and Failure To Discharge Would and Failure To Discharge Would Endanger The Health And Safety Of Endanger The Health And Safety Of Personnel.”Personnel.”
NSTM 593-4.1.3NSTM 593-4.1.3
DUMP OR DIE CLAUSE
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HYGIENE, SAFETY, HYGIENE, SAFETY, AND SANITATIONAND SANITATION
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PURPOSEPURPOSE• Prevent exposure of
personnel to raw sewage during high risk operations
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HIGH RISK OPERATIONSHIGH RISK OPERATIONS
• Hose Handling
• Pump Maintenance
• Valve Maintenance
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SYSTEM HEALTH HAZARDSSYSTEM HEALTH HAZARDS
• Hydrogen Sulfide
• Methane
• Ammonia
• Hepatitis
• Typhoid Fever
• Dysentery
• Cholera
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HYGIENEHYGIENE• PPE - Coveralls, Rubber Boots, Rubber
Gloves, Face Shield
HANDLE POTABLE WATER HOSES FIRST
NO EATING, DRINKING OR SMOKING
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• Flush system for 10 minutes with salt water prior to disconnect
• Keep immunizations current
• Wash hands, arms, and face (with soap)
HYGIENEHYGIENE
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• Wash contaminated spaces with detergent and water (betadyne)
• Never walk through manned spaces with contaminated clothing
• Bag contaminated clothing• Wash clothes separately• Clean rubber boots, gloves, and
faceshield with disinfectant
HYGIENEHYGIENE
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DRIP PANSDRIP PANSFood StoreroomsFood Preparation or Messing AreasUtensil Storage AreasMedical and Dental SpacesBerthing Spaces with valves
located above bunks
HYGIENEHYGIENE
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CHT PUMP ROOM SAFETYCHT PUMP ROOM SAFETY
• Transfer Pumps and Comminutors -
0 leakage• Drip Pans beneath pumps
• 2 EEBDs in Pump Room
• No eating or drinking
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• Exhaust ventilation ducting must be within 9” of deck
• Airflow indicators installed
• Warning Placards
• Wash-up facilities
• Fire Hose connection
CHT PUMP ROOM SAFETYCHT PUMP ROOM SAFETY
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TANK ENTRY TANK ENTRY PROCEDURESPROCEDURES
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TANK ENTRYTANK ENTRYEMERGENCYEMERGENCY
• CO’s permission required (IDLH)
• Follow requirements as per NSTM 593 (page 4-20, steps 1-10)
• Recertify every 4 hours until sludge removed (then 8 hrs)
• Ventilation
• Respiratory protection
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TANK ENTRY STEPS 1-10TANK ENTRY STEPS 1-10• Divert all drains
overboard, tag out• Isolate all heads, drains
below the level of the overflow discharge
• Ensure valve in overflow discharge line is open
• Operate aeration system if available
• Pump out tank completely
• Open tank wash down valve & fill tank until water is observed coming out from overflow overboard discharge. Secure wash down
• Repeat Steps 5 & 6• Repeat Step 5• Secure air supply• Secure pump isolation
valve
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SPILL SPILL PROCEDURESPROCEDURES
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• Procedures should be outlined in your
TOXIC GAS BILL• Follow the Nine PhasesNine Phases of a
Hazardous Material Spill– NAVOSH Program Manual
SEWAGE SPILL CLEAN-UP SEWAGE SPILL CLEAN-UP PROCEDURESPROCEDURES
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SEWAGE SPILL CLEAN-UP SEWAGE SPILL CLEAN-UP PROCEDURESPROCEDURES
• EVACUATE SPACE IMMEDIATELY
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SEWAGE SPILL PROCEDURESSEWAGE SPILL PROCEDURES
• Pass the Word
• Notify what type of spill, amount, compartment #
• Isolate the compartment– Secure ventilation
– Close all doors
– Secure all WT fittings
• Remove casualties
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• Notify ship’s Gas Free Engineer
• Test area
• Safety watch with respiratory protection
• Wash down
• Respiratory protection on hand for cleaners
SEWAGE SPILL CLEAN-UP SEWAGE SPILL CLEAN-UP PROCEDURESPROCEDURES
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• Gas Free every 2 hours; every 1 hr. if temps above 90 deg F.
• Possible portable ventilation
• Final wash down with stock detergent and water
• Disinfectant
• MDR must certify space as clean
SEWAGE SPILL CLEAN-UP SEWAGE SPILL CLEAN-UP PROCEDURESPROCEDURES
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• Contaminated Bilges:– pumped out
– washed w/ fire hose
– pumped out again
• Potable Water Tanks– Monitor daily
SEWAGE SPILL CLEAN-UP SEWAGE SPILL CLEAN-UP PROCEDURESPROCEDURES
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SEWAGE DISPOSAL OPERATIONSSEWAGE DISPOSAL OPERATIONS
• ALL OperatorsALL Operators
Sewage Sewage Collection, Collection, Holding, and Holding, and Transfer (CHT) Transfer (CHT) CourseCourse• A-652-2141A-652-2141• STEP CD-ROMSTEP CD-ROM
Operator / SupervisorsOperator / Supervisors
Shipboard Sewage Shipboard Sewage Collection, Holding, Collection, Holding, & Treatment PQS & Treatment PQS NAVEDTRA 43199-C NAVEDTRA 43199-C WATCHSTATIONS WATCHSTATIONS
301 - 304301 - 304
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SUMMARY•We discussed the Procedures and Safety Requirements of Sewage System Maintenance
•We explained the Requirements, Regulations and Procedures for MSD/CHT Tank Entry
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REVIEW QUESTION #1REVIEW QUESTION #1
• What is the publication in which CHT Tank Entry Procedures are prescribed?
NSTM 593 NSTM 593 POLLUTION CONTROLPOLLUTION CONTROL
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REVIEW QUESTION #2REVIEW QUESTION #2
• When are you allowed to perform CHT Tank Entry Procedures?
EMERGENCYEMERGENCY
CO’S PERMISSIONCO’S PERMISSION