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February 2012Environment
Statement of QualificationsPower Plant Decommissioning Services
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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
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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.
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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
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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
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- 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:
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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
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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
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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
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• 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
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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
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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
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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
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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
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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
www.aecom.com
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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
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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
Chris Carleo, Vice President
Power Plant Closure Services
978.905.2148