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                              Environmental Statement
                     BP OPERATED
What is a Straddle Plant?
A “Straddle” plant has its name because it sits along side of natural gas transmission
pipelines. Natural Gas is extracted from the pipeline, stripped of its Natural Gas Liquids
(NGL) to produce Ethane (C2), Propane (C3), Iso Butane (IC4), Normal Butane (NC4)
and Natural Gas Condensate (C5). Once the process has been completed, the gas is
then recompressed and reinjected back into the transmission lines.
                                    Summer of 2004

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                                                                                   Plant 5

                                                                                              Plant 3

                                                                                                        Plant 2

                                                                                             Plant 1

                        BRITISH COLUMBIA



                                                                     NOVA       TCPL

                                                           Empress SS          Foothills P/L
                                                               NGL PLANTS
                                                   PGT                                       Border

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Foreword: Our HSE Policy
Natural Gas Liquids Business Unit
Health Safety and Environmental Policy

The North American Natural Gas Liquids Business Unit (NGL BU) is committed
to Health, Safety and the Environment (HSE). Effective HSE performance and
the security of each person are crucial to the success of our business.

Our goals are simply stated - no accidents, no harm to people and no damage
to the environment. Prevention of pollution, management of natural resources for
sustainability, and continual improvement are vital components and key to our
We will set and review objectives and measurable targets for our operational
units as a part of continual improvement. Driving down the HSE impacts of our
operations by reducing waste, air emissions and discharges, using energy
efficiently, and assuring a safe work environment for our employees is a priority.

We are committed to:
• comply with relevant legislation and other requirements to which the Natural
  Gas Liquids Business Units subscribes;
• consult, listen and respond openly to customers, employees, neighbors,
  public interest groups and those who work with us;
• work with others - partners, suppliers, competitors and regulators - to raise
  the HSE standards of our industry;
• openly report our HSE performance, good and bad; and
• recognize those who contribute to improved HSE performance.
  Management and employees are committed to this HSE policy.

Issue Date: April 09, 2001

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BP Empress Management Statement
This report is our second environmental statement. The report describes BP’s Empress
operations, environmental performance and the actions we are taking to deliver on our
non-financial business policies.

Introduction to the Natural Gas Liquids Business Unit’s
Environmental Management Systems (EMS)
Our environmental objectives aim to meet or exceed environmental laws/regulations
and minimize our impacts through structured internal targets and environmental
management programs.
We integrate Environmental Management Systems (EMS) that assist in defining
compliance and operating requirements. EMS furthers our conformance assurance with
our environmental policies, demonstrates effective environmental management to
others and promotes continual improvement.
The foundation for these management systems stems from three sets of guidelines:
BP’s Getting HSE Right (GHSER), Getting Health Right (GHR) and the International
Organization for Standardization (ISO) 14001. GHSER and GHR are frameworks
designed to reinforce BP’s corporate policy and expectations regarding HSE

Thirteen elements of BP HSE
Management Systems Framework

1. Leadership and accountability
2. Risk assessment and management
3. People training and behaviors
4. Working with contractors and others
5. Facilities design and construction
6. Operations and maintenance
7. Management of change
8. Information and documentation
9. Customers and products
10. Community and stakeholder awareness
11. Crisis and emergency management
12. Incidents analysis and prevention
13. Assessment, assurance and improvement

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ISO 14000
The ISO 14000 series is a family of environmental management standards developed
by the International Organization for Standardization (ISO), one of the world’s principal
voluntary standards development bodies. ISO 14001-2004 aims to support
environmental protection and prevention of pollution in balance with socioeconomic
needs. It effectively encourages environmental management at all operational levels,
and broadens the scope of awareness.
The ISO 14000 series of standards are designed to provide an internationally
recognized system for environmental management, measurement, evaluation and
auditing. ISO should be used as a tool to enhance a company’s control and assessment
surrounding the environmental impact of their activities, products or services.
The BP Empress Facility became ISO 14001 certified in Dec of 2001.
In 2004, ISO revaluated their standards and issued an updated version. Empress has
currently modified their policies and procedures to comply with the new requirements. In
Dec of 2006, QMI conducted a surveillance audit against the 2004 standards. In Nov. of
2007, QMI will conduct the third recertification audit for Empress’s ISO management

ENVIRONMENTAL POLICY                                                         FUNDAMENTAL ISO
Ensures that top management defines the organization’s                        14001 CONCEPT
intention and commitment to environmental performance

Analyses the environmental impacts and aspects of the
activities and operations.
Considers the governing legal and external requirements.
Establishes and identifies the site’s objectives and
Illustrates the scope of relevant Environmental
Management Programs.

Defines roles and responsibilities
Ensures training, awareness and competence.
Communicates internally and externally.
Environmental Management System documentation.
Establishes operational controls.
Emergency preparedness & response

Monitors and measure performance.
Handle and investigate nonconformance, including
corrective or preventative action.
Maintain procedures for handling environmental records
and continual improvement efforts.
Carry out periodic audits

Conduct periodic management review of EMS
Identify progress achieved towards objectives, targets
and continual improvement efforts

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Description of our operations
Facility Description

The BP Canada Energy Resources Facility Statistics
Company (“BP”) operated Empress
NGL complex is located at the           Capacity              5.6 bcfd    140 E6m3/d
eastern terminus of the NOVA Gas        Ethane            75,000 b/d      12,000 m3/d
Transmission Limited (NGTL) and         NGL               55,000 b/d       8700 m3/d
Foothills Pipe Lines (Alta.) Ltd.       Employees                 77
(Foothills Alta) pipeline systems       Power Usage                           230 MW
about 1 mile west of the Alberta        Equipment                             330 MW
Saskatchewan border. The complex        Storage              15,000 b        2400 m3
exists for the purpose of removing      Largest Driver    40 MW synchronous motor
ethane, propane, butanes and            Process Trains               5
condensate (Natural Gas Liquids or
NGL's) from natural gas produced
in Alberta before the gas is delivered to TransCanada Pipelines Limited (TCPL) and
Foothills Pipe Lines Saskatchewan Ltd (Foothills Sask).

The facilities obtain gas at approximately 4250 kpa (615 psi) and 10 C from the NGTL
and Foothills Alberta pipelines. After processing, the gas is returned to either the TCPL
or Foothills Sask pipelines at the same pressure and temperature as it was obtained.
The complex serves an important role in the management of gas flows in Canada by
                                                           splitting the flow of gas
                                                           between TCPL (delivering to
                                                           Central and Eastern North
                                                           America) and Foothills Sask.
                                                           (delivering   to    the    U.S.
                                                           Midwest through Northern
                                                           Border pipeline system).

                                                         The facility process utilizes
                                                         very       low      cryogenic
                                                         temperatures of up to -95 C to
                                                         liquify and then separate the
                                                         natural gas components.
                                                         Most of the recovered ethane
       View looking north phase 5 in foreground          is used as feedstock for the
                                                         Nova Chemicals ethylene
plant near Red Deer. Some ethane is exported to Eastern Canada and the United
States and some is sold to Dow for use at its Joffre and Ft Saskatchewan plants. The
propane, butanes, and condensates are shipped by pipeline to Kerrobert Saskatchewan
where they are stored in underground caverns formed in salt formations. From
Kerrobert the production is shipped to fractionation facilities in Superior Wisconsin,
Rapid River Michigan, and Sarnia Ontario operated by BP and its affiliates.

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                                                     The complex consists of four
                                                     interconnected facilities. The original
                                                     facility (Empress 1 or Phase 1) was
                                                     constructed by Fluor in 1971 and can
                                                     remove approximately 45% of the
                                                     ethane, 90% of the propane, and
                                                     100%       of    the    butanes     and
                                                     condensates from the gas stream.
                                                     Phase 1 has a capacity of 40 E6m3/d
                                                     (1.6 billion cubic feet of gas per day).
                                                     In 1994 Phase 1 was expanded with
                                                     the addition of another processing
                                                     train with a capacity of 22 E6m3/d
         40 MW Electric Drive Compressor             (800 million cubic feet per day). The
                                                     Phase 1 expansion is designed to
recover NGL's only, however should ethane markets improve it can be modified to
remove ethane as well. At the present the 1994 expansion is mothballed. In the spring
of 2005, the Increased Ethane Recovery Facility (Deepcut) was added to Empress I
facility to maximize ethane recovery while targeting a maximum concentration of 6
mol% CO2 and 2.5 mol% methane in the ethane product. The Deepcut facility achieves
this increased ethane recovery by providing the ability to operate the process at lower
temperatures and by providing more surface area for separation of the C2 and CO2.
With the deep cut modification, Phase 1 overall through put was decreased to 1.1 billion
from the previous 1.5 billion cubic feet of gas per day.
The second facility (Empress 2 or Phase 2) was constructed in 1982 and can remove
up to 70% of the ethane, 95% of the propane, and 100% of the butanes and
condensates from the gas stream.          Phase 2 was designed with a capacity of 60
E6m3/d (2.2 billion cubic feet per day) but has been debottlenecked (1992) to process
up to 2.7 billion cubic feet per day. An additional expansion (Empress 5 or Phase 5)
was completed in 2000. Phase 5 added another 30 E6m3/d (1.1 BCFD) of inlet
capacity and production of up to 22,000 bbl/d of ethane and 11,000 bbl/d of NGL.
Together, Phase 1 and 2 and 5 have a processing capacity of 6.2 billion cubic feet per
day, making the complex one of the highest capacity gas processing facilities in North
America. Phase 1 and the expansion area co-owned by BP (67%) and Provident
Energy (33%). Phase 2 is owned 100% by Inter Pipeline but operated by BP. Phase 5 is
co-owned by BP (50%) and Inter Pipeline (50%).

A fourth facility, the Decompression/Recompression Facility (Plant 3) is owned by
Foothills Pipelines (Alta), but operated by BP, and serves to reduce the pressure of the
Foothills Pipeline gas from about 8000 kpa to 4500 kpa. Plant 3 utilizes a unique
combination of heat exchangers and turboexpanders to recover the energy of the gas
as the pressure is reduced. The recovered energy is used to compress processed gas
into the Foothills (Sask) Pipeline. Plant 3 has an inlet capacity of 2.3 Billion cubic feet
per day and an outlet capacity of 2.3 billion cubic feet per day.

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Facility Process

Both Phase 1, 2 and 5 use approximately the same cryogenic processing methods.
Gas enters the facilities from either the TCPL pipeline or the Foothills Alta. pipeline.
Inlet separators remove any free water or lubricating oil from the gas stream. The gas is
then dried using molecular sieve in large dehydrator vessels (the large vertical vessels
supported on legs). The dried gas is then cooled by heat exchange with gas leaving the
facility in brazed aluminium heat exchangers. These exchangers are sealed inside cold
boxes and insulated with pearlite. The cold boxes are the large white rectangular
objects. The gas leaves the cold boxes at about -75 C and flows into the expander
feed separators where liquids and gas are separated.

The liquids flow to the demethanizer while the gas flows to the expanders. The
expanders operate much like a turbocharger in an automobile. The cold gas enters the
expander and is reduced in pressure from about 4000 kpa (600 psi) to 2100 kpa (300
psi). The reduction in pressure results in the gas cooling to about -90 C with further
condensation of liquids. The expanders also recover energy from the gas stream, with
the larger units recovering up to 7600 kw (10000 hp) each. The power is used to drive
the compressors directly coupled to each expander.

The cold gas from the expander enters the secondary separator where the gas and
liquids are separated. The liquids flow to the demethanizer while the gas mixes with the
gas off the top of the demethanizer and flows into the cold boxes to cool the incoming
gas. Once the gas is warmed through the cold boxes it must be recompressed in order
to reenter the pipeline system. The first stage of recompression is with the brake
compressors, utilizing energy recovered from the expanders. The second stage is with
the large recompressors. The Empress Complex has eight recompressors, two are
driven by gas turbine engines, while the remaining six are driven by large synchronous
electric motors. There are three 26 megawatt (35,000 hp) compressors, two 21 MW
units and one 40 MW (54,000hp) unit. Overall, the Empress facility can use up to 190
megawatts of power (more than the city of Medicine Hat) and is the largest single
industrial consumer of electric power in Alberta.

The demethanizer serves to remove methane from the cold liquid stream. The
demethanized liquid flows to the deethanizer where it is fractionated into specification
ethane and a mixed NGL product. .

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End Use of Products:
The end uses of the products produced at the Empress complex are as follows:

Ethane – Ethane is used in the production of ethylene and polypropylene, both of which
are the basic chemical feed stocks used for a wide variety of end products, the main
being plastic.

Propane – Propane is widely used within the residential and industrial communities, as
well as a source of fuel for heat and transportation. Some examples are: farm
equipment, irrigation systems, heating and cooling, hot water, commercial dryers,
lighting, soldering, barbeques, camping lanterns and truck fuel.

Iso-Butane – Used as an aerosol propellant or in the production of Styrofoam products.
It also has a large use in the formation of ethyl tertiary butyl ether,(MTBE) which is a
gasoline additive that enhances octane levels

Normal Butane – Used as an aerosol propellant, cigarette lighters and gasoline
blending, with another major use as a petrochemical feedstock.

Condensate - Most of the condensate produced at the Empress complex is used as a
diluent for the transportation of heavy crude oils. From there, it ends up in a refinery
and eventually in gasoline.

Our HSE objectives
The Natural Gas Liquids Business Unit (NGLBU) actively pursues continual
improvement in all facets of its operations and facilities. We believe that our
performance efforts in conjunction with our goals of ‘no accidents, no harm to people
and no damage to the environment’ will bring us success and integrity in business.
Our environmental impacts are identified through the collective efforts of regulatory,
HSE, and field personnel. The BP Group enhances this endeavor with its internal
policies, processes and environmental protocols. Identification of existing environmental
impacts is paramount in the chain of shared learnings. Elevated standards ensure that
all facilities adequately measure, report and reflect their environmental impacts

The NGLBU seeks to minimize the impact of our activities on the environment by
reducing our environmental discharges, including wastes and emissions, and optimizing
our energy consumption. Through processes and auditing we are able to identify key
areas requiring continuous improvements. We assertively encourage prevention of
pollution and treatment of existing contamination, as well as, targeting overall reduction
of our discharges, spills and emissions. We strive to be in compliance with all
environmental laws, regulations, and permits, respecting the environment and taking
responsibility for our role in it. To achieve the highest level of HSE performance,
specifically environmental performance, we strive for continual improvement in all that
we do. Through regulations, internal guidelines, sharing best practices, encouraging
green technologies, and aspiring to more stringent targets we can consistently enhance
our productivity without deviating from our commitment of “ no damage to the

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Throughout the history of this facility environmental protection and the safety of both
staff and the public at large and, have been priorities. BP Empress personnel have
developed safe reliable operating and maintenance procedures within the context of a
world class ISO 14001 registered environmental management system.

Our impacts and performance
Through the ISO 14001 environmental management system process, the Empress
complex identifies all environmental aspects related to its activities, services and
products, which may result in an impact to the environment. It also determines how
significant the environmental aspect is in order to prioritize management efforts related
to the control and minimization of these Impacts.

Processes such as management of change, planned inspections, internal and external
audits, and employee HSE opportunity cards are also used to identify environmental
aspects. Since the HSE Policy commits to managing natural resources and reducing
wastes, aspects relating to the consumption of natural resources and the generation of
wastes are also monitored and managed.

Global Warming

Empress recognizes that air quality is a paramount environmental impact. Its primary
challenge is to reduce greenhouse gas emissions through the reduction of methane
both in the form of fugitive emissions and vented gas volumes.

Fugitive Emissions
In the years 2004, 2005 and 2006, a leak detection and repair (LDAR) program was
implemented to reduce fugitive emissions.
Below is a list of tasks that were completed during the implementation of the LDAR
 • New technology (PATs camera) was used to identify sources of fugitive emissions at
    Empress during the spring of 2004.
 • A fugitive emission survey on valve packing leaks was completed in Empress 1 in
    2004. On valves where leaks were identified, the valve packing was adjusted to
    reduce/eliminate the leakage. During the Empress 1 turnaround in the spring 2005,
    the packing was replaced on valves where packing adjustments had little to no affect
 • 2005, the Empress 1 Expansion (Empress 4) was blinded and depressured to
    eliminate any fugitive emissions from that portion of the facility.
 • The Empress 3 survey was completed in 2005 with approximately a 50% completion
    in Empress 2.
 • The LDAR was completed in 2006 for Empress 5
 • The LDAR program will continue at the Empress complex in 2007, completing the
    Empress 2 facility.

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Vented gas volumes
In the reduction of vented volumes of gas, one main operation identified was the blow
back of the gas to gas exchangers (cold boxes) in Empress 2. This blow back was
performed to rid the cold box passes of entrained minute particles of dust and mole
sieve which have passed through the dehydrator filters. This so called dust ends up
fouling the pass surfaces resulting in a decrease in the efficiency of the heat exchange
from pass to pass.
Upon investigation it was noted that the dehydrator filters were not providing an
effective seal on the “filter can” surface, which resulted in dust being able to pass
through the system ending up in the cold boxes.
A modification was made to the filter can, with all of the filter cases being changed over
a 6 month period in 2003.
This modification resulted in a 66% reduction in the number of blow backs required
annually. Prior to 2003 the yearly vented volumes from these blow backs amounted to
7200 E3cf per year and since 2003, this amount has been reduced to 2400 E3cf per

In identifying natural resource depletion as a significant impact, Empress has
encompassed the need to adopt practices that minimize waste burdens and
energy consumption. Fundamentally, energy conservation is paramount for a facility
that utilizes as much power in one day as a city of 75,000 people.

Energy Conservation
In 2006, the NGL BU implemented a program called “Operations Excellence”.
This program has enhanced our operating efficiency as well as implemented several
energy reduction programs/philosophies.
One of these energy reduction programs was the implementation of the “short interval
controls” for operations. This program involved identifying certain control points and
operating parameters. These points and parameters were placed on a tracking sheet for
operations to monitor and control with in the suggested parameters. In the first 6 months
of this program, the facility realized approximately $200 thousand dollars in energy/fuel
On June 22, of 2005, the Empress area experienced a storm which caused severe
damage to Empress and surrounding facilities. One piece of equipment receiving major
damage was the Empress 2 cooling tower. All of the shrouds and fans blades were
damaged. A decision was made to replace the existing fan blades with a different model
of blade that was more efficient.

 Waste management
Waste burden continues to be a high priority for Empress. Empress subscribes to the
“three R’s” (reduce, re-use, and recycle) principles of waste management and have
operational controls designed to ensure proper management and promote waste
minimization, recycling, and regulatory compliance. A comprehensive waste
management plan is in place to address “special” waste material such as batteries,
used paints, chemicals, oily rags, asbestos, insulation and NORM contaminated waste.

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The highest waste product identified was filter cartridges used in the disposal of our
water. One of the main contributing factors in filter usage was the use of wood
fill/packing in the cooling towers. In 2004, all of the wood packing/fill in the cooling
towers were replaced with plastic/fiberglass packing. In 2005 the side stream water filter
on the Empress 2 cooling tower was replaced with a new one. With the implementation
of these two modifications, the filter usage dropped 50%.

Compliance Assurance
The Empress complex is committed to the management and continuous improvement of
minimizing the impact of its business activities on the environment. Empress has
implemented a comprehensive set of programs and systems to assure compliance to
legal and regulatory requirements. It also provides a mechanism for assurance to
Business Unit Leaders and to other stakeholders that Empress is operating in a manner
consistent with corporate and business unit policies.
The programs and systems include but are not limited to the following:

• ISO 14001/04 recertification audits are conducted every three years. These audits
  provide an outlook on the management systems performance and identify any gaps
  that need attention. All nonconformances and opportunities for improvement
  including their corrective and/or preventive actions are entered into a data base to
  facilitate tracking and completion of the action items.

• ISO 14001/04 surveillance audits are conducted annually by a third party to again
  provide management with an assessment on how well the Management System is
  performing. All nonconformances and opportunities for improvement including their
  corrective and/or preventive actions are entered into a data base to facilitate tracking
  and completion of the action items.

• Training and Communication-Communication and training programs are in place to
   communicate compliance requirements to personnel performing work with the
   potential to impact the environment.

• Management Review – Semi-annual meetings are planned with the Empress
   Leadership team to review and update ISO 14001 targets and objectives and go over
   environmental and safety KPI’s

• Environmental Self Assessments – Inspections that focus on the visual and
  physical aspects related to HSE, and include regulatory compliance issues in regards
  to safety and environmental practices. These inspections are completed on an
  annual basis for the facilities.

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Acronym Glossary

ISO                      International Organization for Standardization
MS                       Management System
HSE                      Health Safety Environment
HSSE                     Health Safety Security Environment
E-1, 2, 3 etc.           Empress Phase 1, Empress Phase 2
NGL BU                   Natural Gas Liquids Business Unit
GHSER                    Getting Health Safety Environment Right
GHR                      Getting Health Right
KPI                      Key Performance Indicator
TCPL                     Trans Canada Pipeline
NORM                     Naturally Occurring Radioactive Material
bcfd                     Billion cubic feet per day
NGL                      Natural Gas Liquids
bbls                     Barrels
bls/d                    Barrels per day
MW                       Megawatt
C1                       Methane
C2                       Ethane
 C3                      Propane
IC4                      Iso Butane
NC4                      Normal Butane
C5                       Condensate
hp                       Horse power
LDAR                     Leak detection and repair
KPI’s                    Key process indicators

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Are our statements easy to understand, not detailed enough or perhaps too
Let us know what you think so we can improve our environmental reporting. If you have
any queries about this report or general operations, please write or telephone us and we
will be happy to assist.

Contact details:

Lyle Miller

Tel. = 1-403-838-4241

Fax. = 1-403-838-3919

The next planned update to the Empress Environmental Statement will be Dec, 2008.

Verification Statement
Together with the requirements for ISO14001, independent verification is a requirement for
all major sites within BP.

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