
This publication describes the methods for retaining oil residues on board, to help ship staff comply with the oil discharge limits in MARPOL Annex 1. This book assists owners and operators of oil tankers, oil tanker crew, governments, port authorities, terminal operators, cargo shippers and cargo receivers.
The
clean
seas
programme
was
introduced
by
the
shipping
industry
to
restrict
the
oiperational
discharge
of
oil
in
to
the
sea
by
the
retention
of
oil
residues
onboard.
The
Guide,
which
describes
the
procedures
used
to
retain
oil
residues
onboard,
is
intended
to
help
shipboard
personnel
comply
with
the
oil
discharge
limitations
that
are
contained
in
Annex
1
of
MARPOL.
The
1973
MARPOL
convention,
as
amended
by
its
1978
Protocol,
is
the
international
instrument
controlling
pollution
from
ships.
Annex
1
of
the
convention,
which
contains
regulations
for
the
prevention
of
pollution
by
oil,
came
into
effect
in
October
1983.
Effective
retention
of
oil
onboard
(R.O.B.)
requires
a
thorough
understanding
of
the
procedure
and
the
techniques
required.
OCIMF/ICS
strongly
recommend
this
guide.
Under Annex I of MARPOL 73/78 what is in effect a total prohibition on the discharge of any oil (which means petroleum in any form) or oily mixture from an oil tanker, including its cargo pumproom bilges, is imposed within 50 miles of the nearest land and within certain special areas, and the flow, concentration and quantity discharged elsewhere at sea are strictly limited.
Compliance with those oil discharge limitations is achieved by adhering to procedures for the retention of oil onboard. Essentially these procedures involve the on-board collection and separation of any water and oil mixtures resulting from ballasting and tank cleaning operations. Such mixtures are accumulated in either a special slop tank, or tanks, or in a cargo tank designated as a slop tank, and are subsequently disposed of ashore at the loading or discharging port, or at a repair port. Where reception facilities are not available, the recovered oil and slops must be retained onboard, and either segregated or combined with new cargo loaded on top. In no circumstances may these residues be discharged into the sea unless the safety of the ship or its personnel is in jeopardy.
1
Procedures
-
The
Basic
Method
1.1
Basic
method
assumptions
1.2
Sequence
of
procedures
1.3
Line
draining
and
taking
on
dirty
ballast
1.4
tank
washing
1.5
Loading
clean
ballast
1.6
Settling
of
dirty
ballast
1.7
Disposal
of
dirty
ballast
1.8
Slop
tank
discharge
1.9
Final
line
and
pump
flush
1.10
Discharging
clean
ballast
1.11
Disposal
of
slop
residues
1.12
handling
sludge
1.13
Segregated
ballast
tankers
1.14
Dedicated
clean
ballast
tankers
1.15
New
Marpol
Annex
I
regulations
13f
and
13g
-
Prevention
of
pollution
in
event
of
collision
or
stranding
1.16
Crude
Oil
Washing
2
Operational
Factors
influencing
basic
method
2.1
Short
haul
voyages
2.2
Coastal
voyages
2.3
Special
areas
2.4
OBO
and/or
Ore/oil
carriers
2.5
Preparations
for
repair
ports
2.6
Reception
facilities
3
Other
factors
influencing
basic
method
3.1
General
3.2
Insufficient
slop
tank
capacity
3.3
Interconnected
slop
tanks
3.4
Eductors
3.5
Slop
tank
heating
coils
3.6
Oil/water
separators
and
filters
3.7
Oil
discharge
monitor
and
control
system
3.8
Oil/water
interface
detectors
3.9
Crude
Oil
washing
3.10
Tank
cleaning
chemicals
3.11
Demulsifiers
4
Responsibilities
Annex
I
-
Water
effluent
cleanliness
requirements,
the
30
litres
per
mile
criterion,
the
1/15,000
and
1/30,000
criteria,
characteristics
of
effluents
from
oil
retention
operations
Annex
II
-
Special
Areas
The Oil Companies International Marine Forum (OCIMF) is a voluntary association of oil companies (the ‘members’) who have an interest in the shipment and terminalling of crude oil, oil products, petrochemicals and gas. OCIMF’s mission is to be the foremost authority on the safe and environmentally responsible operation of oil tankers, terminals and offshore support vessels, promoting continuous improvement in standards of design and operation. Learn more at www.ocimf.org
- Number of Pages:
- 28
- Published Date:
- August 1994
- Book Height:
- 210 mm
- Book Width:
- 150 mm
- Author:
Oil Companies International Marine Forum
- Preview:
- Yes
- ISBN:
- 9781856090582
- Binding Format:
- Paperback