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February 2012Environment

Statement of QualificationsPower Plant Decommissioning Services



AECOM

Table of Contents

1 Introduction 1

Assessment/Design 2

Hazardous Materials Removal/Abatement 3

Building/Facility Demolition 4

Closure Documentation 4

2 Power Plant Decommissioning Experience 5



AECOM

Power plant modernization using naturalgas requires 30 to 40% less fuel permegawatt-hour and reduces carbondioxide emissions by 50% and the emissionof conventional air pollutants by more than90%

Section 1 - Introduction

AECOM understands that power companies undertaking plant closures and

repowering projects need technical support in a variety of areas related to

permitting, compliance, engineering and construction. AECOM has completed a

number of power plant closure projects – our staff has the right experience toassure that regulatory requirements are met and that decommissioning work is

completed on-time and on-budget. The cost to upgrade power plants to meet

stringent air quality regulations is not warranted for many facilities that were

constructed more than 40 years ago. Many coal and oil-fired power plants will bere-powered with high-efficiency gas plants that generate the same amount of

electricity. Some of these plants will be closed. The properties will often be

maintained by utility companies for future use or they may be sold if there are

re-development opportunities. There is significant work to be done to completethese projects – including the decommissioning/demolition of the existing power

plant infrastructure and the permitting and construction of new power plants.

This SOQ describes AECOM’s expertise and experience with power plant

decommissioning and provides information on hazardous materials assessmentsand removal/abatement work, preparation of Contingency and Environmental

Control Plans, equipment re-sale and salvage evaluations and construction

management during the demolition and deconstruction work. In addition to this

expertise, AECOM also has extensive experience with facility permitting –another critical aspect of power plant modernization.

We understand the importance of moving re-powering projects forward

on-schedule. AECOM works closely with our power company clients to

understand the layout of the new power plant facilities to target environmental

and hazardous materials assessments. This minimizes “surprises” duringdemolition, excavation and general construction work. AECOM’s environmental

studies address areas where demolition and construction will be conducted so

that such issues as impacted soils are addressed prior to the start of construc-

tion and so that hazardous materials are removed in a timely manner so thatdemolition and construction activities proceed on schedule. In addition, we

understand the importance of updating compliance plans to address facility

changes during the demolition. Performing a comprehensive evaluation of

hazardous materials and addressing compliance requirements assures thatgeneral construction workers are not exposed to hazardous materials or

contaminated media and achieves compliance with applicable regulatory

requirements.



AECOM 2

AECOM uses a proven approach to simplify power plant decommissioning.

Decommissioning involves addressing a wide array of regulatory issues anddecommissioning tasks while managing budgetary and schedule requirements.

Each project is unique. We work with power company personnel to define

objectives, performance metrics and a schedule for the work. AECOM’s Power

Plant Re-Powering Milestones schematic identifies the primary power plantdecommissioning phases and also portrays the relationship to the construction

of the new power facilities.

Assessment/Design

The plant decommissioning will drive certain regulatory compliance issues to be

addressed in a timely manner to minimize risks during the transition. The

identification of environmental issues and hazardous materials is critical to the

success of a decommissioning project. A Phase I Environmental Site Assessment

(ESA) following ASTM’s Standard Practice for Environmental Site Assessments(E1527-05) is a best practice because it provides a framework to comprehensively

identify issues that must be addressed to move the project forward – addressing

both impacts to soil and groundwater as well as hazardous materials in buildingmaterials and power plant equipment. Power plant equipment should also be

evaluated to identify items for re-sale or salvage. AECOM develops detailed

drawings and specifications to define the removal work and facilitate

procurement of contractors. By completing site inspections and interviews withplant personnel, AECOM reviews the following during the assessment:

Power Plant Re-Powering Milestones

New Power Plant Construction

Power Plant Decommissioning

Start-Up

• Licensing/Permits• Environmental Impacts

(visual, noise, etc.)• Concept Design• Preliminary Cost Estimates• Preliminary Project

Schedule• Final Design/Drawings• Specifications• Final Cost Estimates• Procurement

• Excavation/Foundations• Building Erection• Equipment Installation• Utility Interconnects• Commissioning

Planning/Design

Constructon Building/Facility Demolition

• Environmental/HazardousMaterials Assessments

• Abatements/RemovalDrawings/Specifications(Abatement &Deconstruction)

• Cost Estimates• Milestone Schedule

• Oil-Filled ElectricalEquipment

• Tanks and Pipelines• Asbestos Containing

Materials• Lead-Based Paint

Assessment/Design

Hazardous Materials

Removal/Abatement

• Equipment Salvage• Materials Segregation/

Recycling

Closure Documentation • Regulatory Submittals

• Company Documentation



AECOM

• Compliance Plans and Permits – identification of personnel changes and

required notifications.

• Site Construction Documents and History – inventorying undergroundstructures, tanks, piping, ash ponds and other facilities

• Hazardous Materials Assessment – addressing Asbestos Containing Materials

(ACM), Lead-Based Paint (LBP), Mercury-Containing Devices, Oil-Filled

Equipment and PCBs in Building Materials

• Soil, Groundwater and Sediment Impacts – assessment of impacts from historicdischarges and leaks including Phase II Environmental Site Assessments to

delineate impacts and risk assessment to identify areas requiring remediation

• Equipment Salvage Value – evaluation of equipment for re-sale or salvage

AECOM’s approach is to assure that the work meets regulatory requirements,

reduces the client’s liabilities, and is performed safely. AECOM employs a seriesof written procedures that include detailed checklists to assess operations,

activities, and conditions to determine the required closure actions. These

closure actions are documented in the following project deliverables:

• Specifications and drawings for removal/abatement of hazardous materials

• Inventory of items to sell, salvage, recycle or for disposal

• Schedule and task structure with identification of critical path items

• Cost estimates and procurement/bid documents for decommissioning

Hazardous Materials Removal/Abatement

The specific actions undertaken during the decommissioning varies considerably

based upon the future plans for the power plant. The physical removal of the

identified hazardous materials and contaminated soils which present a risk orexceed facility-specific cleanup goals must be completed prior to demolition and

deconstruction work. It is critical to properly characterize materials and

segregate materials to minimize disposal costs. The following identifies a number

of specific actions that may be needed to support the decommissioning:

• Removal and closure of tanks

• Draining of pipeline and oil-filled equipment

• Removal of ACM, LBP and PCBs

• Reconfiguration of piping• Targeted actions addressing soil and groundwater contamination

• Shut down or reconfiguration of stormwater/process water treatment systems

• Closure of ash disposal areas

Building Condition Assessments to identifyAsbestos Containing Materials (ACM),PCBs, Lead-Based Paint (LBP) andMercury-Containing Devices compre-hensively identify environmental issuesand hazardous materials which must beaddressed prior to demolition

3

- Painted Surfaces - Stained Concrete - Fluid Filled Equipment - Caulk Materials - Switches and Thermostats - Batteries - Refrigeration and Compressor Equipment - Water Treatment Systems - Waste Storage - Chemical Storage - Oil/Kerosene/Fuel Storage Tanks and Piping - Insulation, Flooring, Ceiling Tiles, Wall Materials - Oil/Water Separators

Partial List ofKey HazardousMaterialsInventory Areas:



AECOM

During decommissioning, AECOM rapidly updates compliance documents to

reflect personnel changes as well as changes in spill response and contingencyplans.

Building/Facility Demolition

The power plant site may be retained by the power company for current or future

repowering. The demolition and deconstruction work has to be carefully planned

and executed to assure schedule conformance and to minimize costs. Materials

and equipment found to have re-sale or salvage value should be segregated and

managed accordingly. This phase of the work involves the following activities:

• Isolation and removal of equipment identified to have re-sale or salvage value

• Deconstruction of all or part of the power plant, including: buildings, flue stacks,

water and fuel tanks and piping systems, electrical equipment and other power

plant facilities

Closure Documentation

The quantity and type of each material removed from the site during the

hazardous materials removal/abatement as well as during the demolition shouldbe documented to facilitate regulatory reporting, project close-out and for

company records.

We provide a broad array of services to support Power Plant Decommissioning.

AECOM provides all the services to support any aspect of a power plant closure

project to manage and eliminate the risks and to leverage cost savingopportunities. Our expertise includes:

• Hazardous Materials Identication and Abatement – identification of

hazardous materials in equipment and building materials and assessment of

contaminated soil and groundwater including development of removal and

management plans.

• Permit Review and Compliance Assurance – revision of compliance documentsto maintain compliance.

• Equipment and Machinery Evaluation – asset value determination.

• Procurement – cost estimating, preparation of design drawings and

specifications for decommissioning tasks.

• Construction Management – direction and documentation of decommissioning

work.

• Health and Safety – design and implementation of site-safety programs.

• Ash Landll and Tank Closure – closure plan implementation.

• Site Reuse Planning – stakeholder engagement, economic analysis, land-use

planning, habitat restoration and permitting.

Opportunities may exist to develop orrestore wetlands or habitat as part of acompany’s program for banking naturalresources to off set impacts from othercapital projects

4



AECOM

Section 2 - Power Plant Decommissioning Experience

AECOM has been providing environmental and engineering services to the power

industry for more than 40 years. We have completed a wide array of projects for

more than 75 investor-owned gas and electric utilities and numerous

independent power companies. As a leading firm serving the needs of the electricpower, AECOM understands the need to simplify and optimize the power plant

decommissioning process, utilizing the most effective approach to manage

environmental compliance and liabilities and maximize any financial

opportunities. Our extensive power industry experience combined with ourfacility decommissioning experience and depth of resources and global footprint

enables AECOM to effectively manage the complexities of power plant

decommissioning projects.

To highlight our experience, we are providing several project descriptions

focusing on hazardous materials assessment projects and power plantdecommissioning projects. The following introduces these project descriptions

which are provided at the end of this section:

• Decommissioning of Oil-Fired Power Plant Supports New Plant Construction

– this project involved the complete removal of an existing oil-fired power

plant and modernization with a natural gas-fired power plant. Our work on this

project involved a wide array of services addressing environmental issues andconstruction management.

• Preparation of Compliance Plans for Power Plant Closure Project – this

project involved the preparation of an Environmental Control Plan (ECP) and

Spill Prevention Control and Countermeasures (SPCC) Plan to address facilitychanges during the demolition of the power plant.

• MGP Site Cleanup Supports New Power Plant Construction – this project

describes how AECOM effectively managed contaminated soils from a former

Manufactured Gas Plant (MGP) so that a modernization project could proceed on

schedule.

• Power Generation Facility Pre-Demolition Site Assessment – this project

identifies how a pre-demolition assessment is a best practice and allows for

proactive planning of soil management and removal activities.

AECOM successfully managed theenvironmental planning, complianceand abatement work enabling a powercompany to close an oil-fired powerplant and re-power with an efficientnatural gas plant

5



Case Study

Project Results

Fast-track, comprehensive demolitionof two generating units facilitatespower capacity expansion andredevelopment

Client

Major Independent Power Producer

Location

California, USA

Contract Value

USD 4MM

Years

2010–2012

Project Overview

AECOM is providing construction management, environmental compliancemanagement (air, noise, stormwater, groundwater, and soil management),environmental assessment, remediation, reporting, and landscaping servicesfor the demolition and removal of two oil-fired electrical generating units andconstruction of two new high efficiency natural gas electrical generating units.All demolition and construction work must comply with the operating facilitypermits and procedures in addition to the new project regulatory permits andCalifornia Energy Commission (CEC) Conditions of Construction (COCs).

Client Benefits

• Full-time construction management achieved successful demolition, removaland disposal of equipment and materials

• Low-cost disposal approach for PCB-impacted soils and debris with levelslower than 50 ppm saved the project more than $1 million in costs

• Centralized management of all environmental issues allowed for integrateddecision-making, ensuring the project achieved key schedule milestones

• Active management of all environmental requirements related to air emissions,stormwater run-off, and contaminated soil excavation ensured the project wasin compliance with all applicable regulatory requirements

• Access to a wide range of technical experts and resources allowed immediateresponse to many issues and minimized project delays

Work Performed

AECOM served as construction manager and environmental compliance expertfor the comprehensive demolition and decommissioning of two 175 MW capacityoil fired electrical generating units and construction of the combined 530 MWcapacity new natural gas power units. The multi-faceted program included:

• Project controls including cost, schedule, and quality assurance

• Detailed demolition planning to maintain structural integrity for partiallydemolished facilities

Decommissioning Oil-Fired Power Plant

Supports New Plant Construction

[email protected]



• Demolition contractor administration

• RCRA facility investigation and human health riskassessments

• Development and implementation of site-wide health &safety program

• Assessment and remediation of PCB-impacted soils andconcrete

• Construction, excavation and groundwater dewatering

oversight, groundwater treatment, air monitoring and soilmanagement

• Management of vapor suppression during excavation ofVOC-contaminated soil

• Compliance with COC requirements

• Lead, asbestos and hazardous material identification,abatement and disposal

• Air monitoring and compliance, oversight and reporting ofall air management-related issues

• Volatile organic compound emissions data gathering andreporting

• Groundwater monitoring well protection, abandonmentand installation

• Treatment of contaminated groundwater duringconstruction dewatering using sand, fabric and carbonfiltration, ion exchange and biofilters

• Stormwater management and best managementpractices inspection, implementation, sampling andreporting

• Regulatory permitting (air emissions, waste discharge,treatment systems, stormwater discharges,encroachment)

During demolition activities, PCB-impacted soil andconcrete were discovered which required management inaccordance with the Toxic Substance Control Act (TSCA).Historic releases from the air compressors on the sitecaused the PCB impacts. AECOM’s TSCA experts developedan alternative approach to the characterization of the PCBspresent in stockpiles, which was approved by the EPA.

AECOM evaluated several options for the disposal of thePCB-impacted soils and concrete and determined that

materials with >50 ppm PCBs could be managed separatelyfrom those with <50 ppm. Careful segregation of theimpacted soils and concrete isolated the materials with<50 ppm PCBs, and a lower cost approach for the disposalsaved the project more than $1 million. Ultimately, AECOMsecured approval from EPA for the remediation of the PCBsunder a self implementing cleanup, which made the landarea available and cleared so the construction of the newpower plant could proceed.

AECOM’s construction management team was specificallyselected for this project based on prior success of projectsat two other generating plants involving an aggressiveretrofit schedule. At these two power plants, AECOMoversaw asbestos abatement and demolition work forsix coal-fired units, which were subsequently retrofittedwith new air pollution control equipment. AECOM’senvironmental team also was chosen for this project dueto their wide range of technical specialists with TSCAexpertise, extensive resources and local regulatoryexperience.

AECOM Case Study

M5PD0113



Case Study

Project Results

Environmental management plansdocumented key compliancerequirements to be followedduring power plant demolition

Client

Electric Power Utility Company

Location

Florida, USA

Contract Value

USD 10K

Years

2010–2011

Project Overview

AECOM developed an Environmental Control Plan (ECP) to assure that theactivities associated with the demolition of a power plant conformed to goodenvironmental practices, applicable regulations, permit and site certificationconditions, and other construction constraints. The ECP described theprocedures to be followed to comply with regulations associated with spillprevention and control, hazardous waste and hazardous materials management,stormwater discharges, groundwater discharges, traffic, noise and a number ofother areas. The ECP identified monitoring procedures for each project activityduring construction and startup. The ECP included a Stormwater PollutionPrevention Plan (SWPPP) and a Spill Prevention Control and Countermeasures

(SPCC) Plan.

Client Benefits

• Maintained compliance during demolition through comprehensiveEnvironmental Control Plan that addressed all applicable regulations

• Training and education of site workers ensured compliance throughout theproject

• Addressed changing conditions present on the site during demolition throughcomprehensive SWPPP and SPCC Plan

Work Performed

A major power company elected to re-power and modernize one of its existingpower plants. The project involved the demolition of an existing 1960s-era powerplant and the construction of a new power plant. AECOM was retained to developan Environmental Control Plan (ECP), SWPPP and SPCC Plan to identify specificenvironmental protection measures needed during the demolition work to assurecompliance with applicable regulations.

Environmental Management Plans

for Power Plant Demolition

[email protected]



The ECP addressed training requirements and a wide-array of project compliance requirements. The projectcompliance requirements included the following areas:

• Hazardous Waste Management

• Hazardous Materials Management

• Spill Prevention

•

Emergency Response• Stormwater Pollution Prevention

• Revegetation

• Noise Control

• Traffic Control

• Historical and Archeological Resources Inventory

• Endangered and Threatened Species Surveys

• Laboratory Sample Analysis Quality Assurance

• Fugitive Dust Control

• Water Conservation

AECOM developed a Permit Matrix as part of the ECP toidentify specific actions needed to maintain compliancethroughout the project. The ECP assigned specificresponsibilities for each compliance requirement andit contained procedures and processes for monitoringactivities during the construction period. The proceduresand processes included project meetings, site inspections,subcontractor reviews, non-compliance reportingprocedures, emergency action procedures, and otherproject reporting procedures.

The SPCC Plan was developed in accordance with therequirements of 40 CFR 112 to address the changingconditions at the site including existing fuel oil tankfacilities as well as temporary tanks used to storepetroleum products in use during the demolition. Inaddition, AECOM prepared a SWPPP that also addressedthe changing conditions at the site during the demolition.The SWPPP identified the materials potentially exposedto precipitation, stormwater flow directions, bestmanagement practices to eliminate the potential for off-site transport, and inspection and reporting requirements.

AECOM Case Study

M3PD0012



Case Study

Project Results

Construction of a new power plantproceeds on schedule due to fast-track approach to site investigation,remedial design, and site cleanup

Client

Large Gas and ElectricUtility Company

Location

Minnesota, USA

Contract Value

USD 1.3MM

Years

2004–2006

Project Overview

AECOM provided design and environmental site management services to supportthe decommissioning of a coal-fired power plant and the construction of a newgas-fired combined-cycle power plant, while addressing historic environmentallegacy issues at the site.

Advocating a risk management approach, the project team convinced theregulatory agency to adopt an industrial cleanup goal, which reduced the client’sremedial expenditures. AECOM kept the project on schedule and reduced costsby integrating the remedial action with construction activities.

Client Benefits

• Completed “fast-track” work to accommodate client’s power plantconstruction schedule

• Facilitated seamless client management of remedial program andconstruction through detailed remediation schedule and cost estimates

• Reduced client’s remediation costs by demonstrating the prudence of using anindustrial cleanup standard as basis for risk assessment

• Eliminated the need for multiple mobilizations by integrating the remedialaction with power plant construction

Work Performed

To meet air quality standards, a utility company needed to replace an old coal-fired power plant with a new gas-fired combined-cycle power plant. Part of theintended power plant construction site was contaminated from past activities.The site contained a large former manufactured gas holder tank, waste residuesfrom the gas storage operations, polycyclic aromatic hydrocarbons (PAHs),benzene, toluene, ethlylbenzene and xylenes (BTEX), and complex cyanide insoils and groundwater.

MGP Site Cleanup Enables New Power

Plant to be Constructed

[email protected]



AECOM evaluated the environmental conditions associatedwith former manufactured gas storage tanks to developa remedial approach that could be integrated into theaggressive construction schedule for the new power plant.

AECOM compiled and evaluated over 15 years of siteenvironmental data to scope the final data collectionefforts and the development of the remedial actionplan. Based on this evaluation, AECOM prepared a costestimate to address the environmental conditions thatwas incorporated into a project-wide cost estimatesubmitted to the Public Utilities Commission. The projectteam completed supplemental site assessment activitiesincluding a Phase I ESA, risk-based soil/groundwaterevaluations, and a Pre-Design Investigation to assure theremedial design fully addressed the impacts. Throughoutthis work, the team conducted frequent regulatorycommunications and meetings to illustrate the objectives ofintegrating the remedial and construction work, and to meetthe aggressive power plant construction schedule.

The response action design included addressing a formergas holder for which dewatering and engineered pilingswere necessary to safely and cost-effectively remove thecontents of the remaining structure, as well as removal ofcontaminated soil. AECOM developed bid specificationsand plans and completed oversight during implementationof the remedial action work. Additionally, AECOMdeveloped a materials management plan and a constructioncontingency plan to guide materials handling decisions andcommunication procedures throughout both the remedialaction phase and power plant construction phase of theproject.

AECOM evaluated and presented the site environmentalimpacts in the context of risks associated with the futureuse of the site, convincing the regulatory agency that anindustrial cleanup goal was appropriate for the site. This

reduced project costs, because smaller quantities of soilrequired remediation. Additionally, integration of theresponse plans into the construction schedule provided theclient significant cost savings by minimizing mobilizationsand limiting duplication of efforts - ultimately preventingcostly schedule slippage and enabling the successfulcompletion of the new power plant construction.

AECOM Case Study

M5PD0033



Case Study

Project Results

A comprehensive pre-demolitionsite assessment and report wasdeveloped to address environmentaland health and safety concernsthat could impede demolition andconstruction activities at the powergeneration facility

Client

Major Power Generation Facility

Location

Arkansas, USA

Contract Value

USD 40K

Years

2009

Project Overview

AECOM was contracted to identify environmental concerns that could potentiallyimpede planned demolition and construction activities at a power generationfacility in Arkansas. A comprehensive pre-demolition site assessment andreport was developed to address environmental and health and safety concerns,including chemical analyses of on-site constituents of concern.

Client Benefits

• Recommendations for pre-demolition activities were presented in a samplingwork plan

• Identified potential environmental and health and safety concerns at thepower generation facility

• Simplified flowcharts identified soil management options for use by facilitypersonnel

• Pre-demolition checklists were developed for use by facility and managementpersonnel

Work Performed

AECOM was contracted to identify environmental concerns that could potentiallyimpede planned demolition and construction activities at a power generationfacility in Arkansas. Pre-demolition site assessment activities included a facilityvisit to conduct interviews with plant staff, and to review areas within the facility

that were marked for demolition activities. Comments and information obtainedfrom facility personnel and observations collected during the facility visit weredocumented on Pre-demolition checklists. The information and observationswere summarized in a comprehensive Pre-demolition Assessment Report.

Power Generation Facility

Pre-Demolition Site Assessment

[email protected]

www.aecom.com



Recommendations for pre-demolition activities werepresented to the client’s team in a sampling work plan. Thework plan identified sample locations in each potentiallyimpacted area based upon observations during the facilityvisit, the likelihood of a release or spill in each area, andcomments from personnel. Chemical analyses for thepotential constituents of concern were selected based oncomments, observations, and historical site usage. Resultswere summarized and presented to the client in a Site

Assessment Report.

The scope of work also included the development of a soilmanagement plan that identified soil management optionsfor the non-intrusive activities at the facility. These options

were presented as simplified flowcharts to be used byfacility personnel.

AECOM Case Study

M6PD0036



About AECOM

AECOM is a global provider of professionaltechnical and management support servicesto a broad range of markets, includingtransportation, facilities, environmental,energy, water and government. With

approximately 45,000 employees around theworld, AECOM is a leader in all of the keymarkets that it serves. AECOM provides ablend of global reach, local knowledge,innovation and technical excellence indelivering solutions that create, enhance andsustain the world’s built, natural and socialenvironments. A Fortune 500 company,AECOM serves clients in more than 130countries and has annual revenue in excess of$8.0 billion.

More information on AECOM and its servicescan be found at www.aecom.com.

For More Information Contact:

Joe Curreri, Vice President

Global Power Sector Lead978.905.2177

[email protected]

Chris Carleo, Vice President

Power Plant Closure Services

978.905.2148

[email protected]