WSP Contaminated Lands and Geo-sciences SOQ

Contaminated Lands and Geo-sciences

STATEMENT OF QUALIFICATIONS

GLOBAL PRESENCE AND LOCAL AGILITY At WSP, we are the sum of our united passion, vision and expertise. We remain inspired to develop innovative solutions to complex challenges that the future will bring to help our local communities thrive throughout the world. To do this, we build on the strength of our people who help drive the vision and uphold our collective beliefs. From our local beginnings more than 130 years ago to our vast international presence today, WSP has enjoyed continuous growth and enrichment of its service offering. Every milestone reached has enabled us to better fulfill our purpose of preparing our communities and environment for the future. With offices throughout the world, you can connect with one in your local community. WSP’s engineers, technicians, scientists, architects, planners, surveyors and environmental specialists, along with design, program and construction management professionals, create

enduring solutions in the Transportation & Infrastructure, Property & Buildings, Earth & Environment, Power & Energy and Industry sectors. They also provide essential advisory services. Fueled by global resources and intellect, our team of technical experts and strategic advisors harnesses this wealth of knowledge to meet our clients’ needs, committed to enhancing communities worldwide.

“Drawing on the wisdom of our experts, real change comes from assisting clients who share our goal of moving swiftly towards an equitable, inclusive, and net zero world.” Alexandre L’Heureux, President and CEO, WSP Global

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CANADA 140+ OFFICES

EUROPE 140+ OFFICES

ASIA 10+ OFFICES

UNITED STATES 252+ OFFICES

MIDDLE EAST & INDIA 8+ OFFICES

LATIN AMERICA & CARIBBEAN 20+ OFFICES

AUSTRALIA & NEW ZEALAND 30+ OFFICES

AFRICA 10+ OFFICES

BY THE NUMBERS 73K GLOBAL EMPLOYEES

Our international agility allows us to foster collaboration in everything we do. Working as one integrated firm, we offer broad interdisciplinary expertise on every project.

23K ENVIRONMENTAL EMPLOYEES 130 YEARS IN BUSINESS

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Who We Are

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At WSP, we are agents of change who dare to challenge the status quo and act with purpose to create lasting positive impacts.

Inspired by diversity, driven by inclusion, we work with passion and purpose. We are: z Passionate people doing purposeful and sustainable work that helps shape our communities and the future. z A collaborative team that thrives on challenge and unconventional thinking. z A network of experts channeling our curiosity into creating solutions to complex issues.solutions to complex issues.

World

Class Talent

Driven by possibilities, purpose and pride, our enduring commitment to the betterment of society and our understanding of the stakes fuels our work. We are committed to our local communities, while being propelled by a well of international brainpower.

Proactive Leaders

Complexity, proactivity and accountability inspire us. By helping our clients design lasting solutions for the advancement of our built and natural environments, we are building a powerful legacy.

We want to play a key role in delivering a sustainable and resilient world. Through our project delivery, our approach lies in our commitment to provide forward-thinking advice and unparalleled expertise locally to help our clients thrive in a changing world. We are actively seeking out the most transformative, innovative solutions to pioneer a more sustainable future.

Completing Enduring Projects Born Of Complexity

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Future Focused, Future Ready ®

With Future Ready ® we see the future more clearly and challenge our teams across the world to advise and design for this future as well as today. Future Ready ® is WSP’s global innovation and sustainability program that demonstrates our overall growth strategy.

Click Here to View our Global Strategic Action Plan

Through our Global Strategic Action Plan - 2022-2024 (wsp.com), this program is geared toward challenging and inspiring our people to advise and design programs ready for the future as well as today.

Although it’s difficult to imagine the future’s possibilities, we understand that our current achievements will have a profound effect on future generations. WSP’s Future Ready ® program motivates and empowers our staff to foresee upcoming conditions by examining trends in climate, society, technology, and resources. This initiative involves incorporating these trends into our work and aiding our clients in creating pioneering innovations. By considering present, emerging, and expected trends, our Future Ready ® approach means that our solutions are prepared for a constantly evolving future.

Future Ready ® Leads to Sound Investments

We support our clients in making sound investments today for the benefit of the communities they serve, whatever tomorrow brings.

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Analyzing Future Trends Through Four Lenses Future Ready ® for the Environmental Sector WSP’s environmental approach to Future Ready ® is thinking beyond the conventional so that we can balance the needs of the natural and built environments, as well as plan and design communities and infrastructure that are ready for the changes and challenges our world will face in the future.

As a Future Ready ® consultancy, we leverage technology to enhance our environmental services and deliver value to our clients. Our teams make sure of the deployment of state of-the-art tools and platforms to collect, analyze and visualize data, optimize processes and performance, and enable smart decision-making; even if that means pushing boundaries in the industry by developing bespoke solutions to meet client needs. We also foster a culture of innovation and collaboration where our experts can share their knowledge and insights across disciplines, geographies and business lines.

While every human activity and development impacts the natural world, WSP applies best practices and innovative approaches to protect the environment. Our priority is to understand our clients’ technical challenges and long-term needs, and to provide sustainable and environmentally sound strategies and solutions. Future Ready ® allows us to do that more effectively by bringing future conditions into focus.

RESOURCES

CLIMATE

TECHNOLOGY

SOCIETY

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OUR GUIDING PRINCIPLES

We value our people and our reputation Our commitment to attracting, developing, engaging and retaining top professionals in our areas of expertise is what makes us exceptional. By applying distinguished ethical standards at the core of all we do, professionalism is inherent in the work we perform within our communities. We are humble and act with moral and intellectual integrity, keep our word, treat everyone with respect, support our colleagues and embrace diversity. We care about individuals and their progress, offering fulfilling career development for our professionals. This includes promoting our young recruits because we firmly believe that fresh perspectives bring great ideas and new energy.

We are locally dedicated on an international scale Our strength is our ability to adapt to our client culture and local markets. We provide our clients with the same personalized services as a specialist firm while simultaneously leveraging our worldwide expertise to undertake complex projects and assist our clients to realize their ambitions. We achieve this by remaining agile with a common-sense approach, and by keeping our structure and business model simple and lean. Our focus on growth also allows us to better serve our clients by expanding our offering, expertise and geographical reach.

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OUR PURPOSE We exist to future proof our cities and environments.

OUR ROLE

OUR BELIEF

We plan, design, manage and engineer our communities to thrive.

For societies to thrive, we believe that we must all hold ourselves accountable for tomorrow.

We are future focused and challenge the status quo We work to track and anticipate current engineering trends to provide fresh, innovative ideas for our clients to meet their business objectives. We ask questions, look at complex problems from different angles and find solutions that break paradigms. Our teams of problem-solvers evolve, improve, modernize and excel in providing solutions that will shape the communities of tomorrow and help societies thrive sustainably. We embrace change and have an uncompromising determination to achieve excellence.

We foster collaboration

We have an empowering culture and hold ourselves accountable Our teams of dedicated professionals are empowered to turn challenges into opportunities while being held accountable to standards beyond the norm. Our proactive leadership enables us to be client-focused, agile and responsive, while simultaneously accountable to our clients, our peers and our shareholders.

in everything we do Our international agility is founded on our collaborative working environment. Our devotion to teamwork creates unique international networks of outstanding professionals who acknowledge that great achievements come from collaboration. We embrace and support a high-performing culture, consistently strive to learn from others and foster a stimulating work environment. We put the interest of our team at the forefront of all we do to foster the collegiality that defines our firm.

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WSP in the USA

Our teams are well positioned to deliver successful projects , wherever our clients need us.

NORTHEAST 24 OFFICES

MOUNTAIN PACIFIC 40 OFFICES

MIDWEST 44 OFFICES

MID-ATLANTIC 31 OFFICES

CALIFORNIA 21 OFFICES

SOUTHEAST 49 OFFICES

TEXAS & LOUISIANA 12 OFFICES

BY THE NUMBERS ENGINEERING NEWS-RECORD 2024 RANKINGS #2 TOP 100 PURE DESIGNERS #4 TOP 20 DESIGN FIRMS FOR TRANSPORTATION

#5 TOP 500 DESIGN FIRM

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Positive impacts, achieved together

Our value statement, “Positive impact, achieved together,” is more than just a tagline; it’s a call to action. It’s an invitation for each of us to unite behind a common purpose, harness our unique strengths and expertise and work collaboratively to drive meaningful change. With more than 19,000 employees in more than 250 offices across the U.S., WSP partners with its clients to help communities prosper. WSP’s diverse teams are comprised of talented, skilled and experienced professionals who are: z Collaborative and thrive on challenge and unconventional thinking z Leaders in multiple technical fields z Committed to the highest ethical standards z Passionate about delivering sustainable work that improves our communities and creates a more equitable future

BY THE NUMBERS

19K US EMPLOYEES 250+ OFFICES

C

Together, we’re shaping a brighter future. “Every day we have the privilege of tackling complex environmental challenges head-on, providing innovative solutions and expert guidance. It’s truly inspiring to witness the positive impact we’re making on our clients’ businesses and the world around us. I couldn’t be prouder to be part of this team, united in our mission to create a sustainable and resilient world.” Andre-Martin Bouchard Global Leader, Earth & Environment

#6 TOP 200 ENVIRONMENTAL FIRM

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With us, you can turn challenges into opportunities, shaping a future where business thrives in harmony with nature.

Earth & Environment

We strive to be the premier earth and environmental consultancy. We apply technical and delivery excellence , progressive thinking and collaborative approaches to address our society’s greatest challenges. Our diverse teams make a profound impact on our people, projects and communities, today and into the future.

Imagine being at the forefront of protecting biodiversity, driving sustainable business practices, and developing land sustainably. Picture advancing the science of remediation, safeguarding water resources, spearheading the energy transition, and fostering resilience in a changing world. With us, this vision becomes reality. We offer a comprehensive range of solutions, from assessing environmental impacts and conducting socioeconomic studies to planning, designing, permitting, and ultimately decommissioning and restoring contaminated sites. Through strategic insights and practical engineering solutions, we are committed to driving meaningful change in businesses, communities, and the planet. With us, you can shape a better future. WSP’s earth and environment service offering has undergone a remarkable transformation throughout the last five years, welcoming multiple highly respected firms. With a team of more than 4,200 multidisciplinary environmental experts across the US in more than 250 offices and 23,000 across the globe, we are an extraordinary force, with unparalleled depth and breadth of expertise, capable of tackling complex projects anywhere in the world.

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WSP is proud to have earned a record four accolades at the Environment Analyst’s 2024 Sustainability Delivery Awards: z Sustainability Impact Award z Sustainability Leader of the Year z Top honors for our Nature Positive z Transportation Project of the Year

WSP HONORED AT 2024 ENVIRONMENT ANALYST’S SUSTAINABILITY DELIVERY AWARDS

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Earth & Environment SERVICES Our services encompass a comprehensive range of consulting and technical expertise, covering a broad spectrum of general and specialized areas including: z Climate Change, Resiliency and Sustainability z Air Quality, Noise, Vibration and Acoustic Services

CLIMATE CHANGE

AIR QUALITY

z Contaminated Land and Geo-Sciences z Site Investigation and Remediation z Ecology, Landscape, EIA, Permitting and Social Acceptability z Environmental Management, Compliance, Risks, Hazards and Due Diligence z Mining and Geotechnical Engineering z Environmental Water z Waste, Hazardous Materials, Landfills, and Waste to Energy

GEOTECH

ECOLOGY

ENVIRONMENTAL MANAGEMENT

ENVIRONMENTAL WATER

Every day across our firm, colleagues are delivering projects and leading initiatives that make a significant difference for our clients and the communities in which we live and work.” Joe Sczurko, US Region President

WASTE

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Earth & Environment SECTORS

INDUSTRIAL & COMMERCIAL

Our talented people engineer projects around the globe for government entities and private sectors that will help societies grow for lifetimes to come. z Industrial and Commercial z Federal, State and Local Governments z Water z Mining z Oil and Gas z Power and Energy

FEDERAL

STATE & LOCAL

MINING

OIL & GAS

POWER & ENERGY

WATER

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What We Do We develop creative, comprehensive and sustainable engineering solutions for a future in which society can thrive.

Our projects represent a vast geography, diverse client base and varying level of complexity.

Our talented team of professionals are no different - located in and representing every part of the world while supplying the suitable skill set and expertise to tackle all project types.

We help our clients navigate their digital transformation journeys.

We build breakwaters, intake and outfall pipelines ; dredge and reclaim land ; and ensure that shores are protected and resilient .

We support our clients’ upstream, midstream, or downstream oil and gas projects at all stages of the project lifecycle.

We combine our world-class

knowledge with in depth experience of local social, political and economic conditions to ensure sustainable projects t hat meet specific needs.

We performs comprehensive regulatory, site characterization , engineering , and turnkey remediation .

Projects in our local communities are especially meaningful.

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Our projects include comprehensive technical support to the renewable energy industry.

We develop strategies to mitigate emissions and enhance sustainability , identify potential risks and opportunities to become more resilient .

We have insightful

due diligence consultancy projects to help decision making.

Our cultural projects encompass galleries , museums , performance venues and community spaces on every continent.

Our projects include government and industry clients who are seeking strategic advice and solutions to manage their waste more effectively and to integrate sustainable practices .

Our water resource projects focus on healthy ecosystems a nd their vital role in the resilience of our water sources.

We have 5,200 dedicated mining

professionals supporting the industry in delivering the metals and minerals required for a greener future.

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CONTAMINATED LANDS AND GEO-SCIENCES

WSP is a global leader in professional services, providing engineering, design, consulting, and project management solutions for the built and natural environments. With more than 73,000 employees in over 600 offices across 40 countries, WSP delivers innovative and sustainable outcomes for clients in various sectors, including transportation, buildings, energy, water, environment, and resources. One of WSP’s core areas of expertise is contam inated land and geo-sciences, which encom passes the assessment, remediation, and man agement of soil, groundwater, and sediment contamination, as well as the characterization and engineering of geological and geotechni cal conditions. WSP has a proven track record of delivering high-quality and cost-effective solutions for complex and challenging projects, ranging from brownfield redevelopment and mine closure to infrastructure development and climate resilience.

Heightened environmental awareness, public concern for sustainable development, and stringent environmental protection laws and regulations have compelled organizations to change how they operate and address legacy issues posed by historical contamination and land use.

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WSP’s contaminated land and geo-sciences team comprises more than 1,500 specialists worldwide, including engineers, geologists, hydrogeologists, geochemists, risk assessors, remediation experts, and project managers. WSP has demonstrated expertise in the full scope ofcontaminated land and remediation projects, from environmental site assessmentto regulatory compliance and permitting, site investigation and remediation,and brownfield recovery, reinvestment, and transformation. Our specialists excel at addressing environmental liabilities for both public and private sector clients. We manage legacy issues by mitigating the risks posed by historical contamination and land use; we protect current assets through monitoring, management, and updates, and we future proof to cope with an ever-changing regulatory landscape and climate. Our teams are positioned with local knowledge and global expertise. This first-hand knowledge provides the experience required to ensure we provide our clients with innovative designs that are cost-effective and readily implemented.

Our management strategy is different than our competitors. We collect discrete, predictive and actionable data using advanced diagnostics before remedy implementation. Our approach removes iterative cycles of routine data collection and implementation of under-performing and non-performing remedies. Our approach is designed to evaluate remedies in small, controlled and contained ways to allow the best alternative to emerge that fits a business need. We are also renowned for the strength of our relations with regulators across the U.S. This is built on the creditability of our professional expertise and our practical approach to ensuring a positive outcome for all parties. Many of our clients have benefited from successful site closures due to our pragmatic and innovative approach to existing site conditions. WSP brings comprehensive regulatory, site characterization, engineering, and turnkey remediation and construction experience to each

project, whether for cost evaluation, a feasibility study, or detailed design.

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Environmental Site Assessments WSP personnel have been conducting environmental site assessments (ESAs) since the inception of this type of site assessment, both regionally and nationally. ESAs are per formed in accordance with the American Society of Testing and Materials (ASTM) stan dards and the All Appropriate Inquiry (AAI) rule issued by the USEPA. A Phase I ESA is typically the first phase in de termining a site’s condition, defining the prop erty’s environmental status, and identifying any environmental concerns based on the historical or current use of the property. One of the main objectives of the Phase I ESA is to evaluate the site for evidence of Recognized Environmen tal Conditions (REC), which may lead to future liability and pose an environmental concern for the site’s development. Based on the Phase I ESA findings, a phased environmental site inves tigation (ESI) may be required to characterize potential contamination in the areas of concern identified during the ESA, typically by sampling and analysis. Phase II and Phase III investigation strategies are developed based on the results of a Phase I ESA, and can be used to evaluate the possible effects of a known release or to evaluate for a possible release.

We develop a site-specific sampling approach that considers the conceptual site model, sam pling objectives, constituents of concern, environ mental setting, number and locations of borings and samples, and target sample depths. Constit uents or chemicals of concern are selected based on a review of the commercial or industrial pro cesses (and typical materials and wastes associat ed with those processes), waste disposal records, observations recorded during site inspections, and owner/operator knowledge. WSP often utilizes ArcGIS desktop application as its GIS software to integrate planimetric information with site-specific data collected during environ mental investigations. Environmental data collect ed during the investigation phase of the project is collected and compiled within a centralized database (Access). The Access database provides continuity across the project timeline with seamless integration into GIS. Using GIS provides an opportunity for WSP to integrate historical, socio-economic and environmental data into a project that can be managed from site assessment through cleanup and redevelopment. Based upon our prior experience providing environmental services to various state agencies, we understand this task is also fundamental to the success of project permitting.

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Our local team members understand of the importance of these environmental assessments and how they affect a particular project’s per mitting efforts, both in terms of schedule and regulatory compliance. Whatever the project’s specific needs are, we can tailor an ESA to meet them. Hydrogeology Water supply investigation, development, engi neering, and permitting have become increas ingly important as competition grows for finite resources and environmental concerns strength en regulations. The science of evaluating poten tial impacts on groundwater and surface water resources and land uses has likewise become a critical aspect of water supply development. WSP offers comprehensive consulting services in every facet of hydrogeology. Areas of expertise include hydrogeologic and groundwater resource assessments, environmental investigations, nu merical groundwater flow, contaminant fate, and transport modeling. We have specialized expertise in assessing construction and dewatering projects and developing innovative water management ap proaches. Our team maintains state-of-the-art capabilities to accurately and cost-effectively

characterize contaminated sites, especially those that have a complicated groundwater component. Our hydrogeologists apply scientific knowledge and analysis to understand groundwater-related issues, including assessing the quantity, quality and availability of groundwater. At the beginning of Site Characterization (Preliminary Assessment/Site Inspection stage), WSP will construct a CSM that describes the subsurface conditions and the potential for the flow of groundwater and potential transport of constituents. This CSM is a living document that will be updated constantly with the collection of new data, many of which are discussed above. The CSM is then used as the basis for the gener ation of an analytical or numerical vadose zone and/or groundwater model. These models are then used to design and plan active remediation systems, monitor natural attenuation and con duct long-term monitoring toward obtaining Site Closure (SC).

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Remediation Strategies WSP’s approach to implementing successful site remediation strategies hinges on our com mitment to develop an accurate conceptual site model (CSM) and integrate it with our understand ing of our client’s strategic business objectives. To achieve this, we thoroughly evaluate existing site data, establish key technical issues, identify data gaps, propose cost-effective investigations to fill those gaps, and evaluate both presumptive remedies and emerging technologies. We use a CSM development methodology that achieves an integrated evaluation of site geology, hydrogeology, geochemistry, fate and trans port, and pathways and potential receptors, which ulti mately can be used to support risk-based cleanup alterna tives. Our team brings industry-leading expertise to in situ ground water remediation, vapor intrusion, and sediment assessment. We are known as a trusted partner of PRP groups seeking regulatory closure at sites across the country. WSP is often brought in when our client is looking for a better path to site closure. We have a reputation for effective regu latory negotiation, developing sound technical solutions with broad-based stakeholder acceptance and we have a proven record of gaining approval of risk-based remedies and suc cessfully demonstrating equivalent performance of less-costly remedial options.

Remediation is one of WSP’s premier services offered to our clients. WSP has been an industry leader in applying in novative remediation approaches for many years, utilizing proprietary technologies and the best available commercial technologies and collaborating with universities to test and evaluate innovative new technologies. Within the last three years, WSP has been at the forefront of PFAS remediation, pioneering the use of regenerable ion exchange resins (Pease AFB) and testing a new plasma destruction technology

developed by Clarkson University (and under testing in both SERDP and ESTCP). In addition, WSP has relationships with a number of small business remediation technology compa nies such as FRX-Inc. WSP teamed with FRX-Inc. three years ago to use fracturing of the subsurface at 180-200 feet below ground surface for the enhanced injection of amendments to treat chlorinated solvent hot spots. The depth of fracturing (180 200 feet) remains the deepest fracturing project for remediation purposes in North America.

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Site Closure We use environmental risk management approaches that consider ecological and human health receptor protection to determine cost-ef fective cleanup solutions. Some of these risk-based approaches in clude working to minimize the volumes of soil and groundwater that need to be remediated and maximizing the materials that can be left undisturbed, as well as identifying strategies that work on sites with similar contaminant profiles and transferring those strategies to other sites as a cost and time savings to our clients. Predictive modeling is used to support the risk management strategy. It is particularly effective for produced water (salt) impacts where impacts are widespread, remediation is challenging and costly, and the potential future effects on receptors can be predicted with reasonable accuracy.

WSP has a team of experts in upstream reclamation who work with regulators and stakeholders to progress sites to final closure. We steward each site as it progresses to the closure stage, meeting the regulatory, landowner and client requirements. Implementing these strategies on large portfolios of sites for our clients has benefit ed them by realizing efficiencies, balancing risk, and ultimately providing them with cost savings. We have now driven the regulatory closure of over 100 sites and the effective progression of hundreds more.

From project concept to completion and beyond, WSP has the diverse skills and expertise needed to work with clients on contaminated land projects of all types and sizes, from major infrastructure and site development, to oil refineries, manufacturing sites and mine closures

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Risk assessment and management

WSP performs human health and ecological risk assessments and management, using best practices and regulatory frameworks, to evaluate the potential impacts of contamination on recep tors and the environment. WSP develops risk-based objectives and strategies, such as risk mitigation, risk communication, and risk transfer, to protect public health and the environment, and to facilitate site clo sure and redevelopment. Geo-environmental engineering

WSP provides geo-environmental engineering services, such as geotechnical and geological engineering, landfill engineering, slope stability analysis, foundation design, and ground improvement. WSP applies geo-environmental engi neering principles and practices to address the challenges and opportunities posed by the interaction between the natural and built environments, such as soil-structure interaction, groundwater-surface water interaction, and climate change adaptation. Geo-sciences consulting

WSP provides geo-sciences consulting services, such as hydro geology, geochemistry, geophysics, and geomatics. WSP ap plies geo-sciences knowledge and expertise to support various aspects of project delivery, such as water resources manage ment, contaminant fate and transport modeling, groundwa ter-surface water interaction, natural attenuation, geochemical fingerprinting, geophysical surveying, and spatial data analysis. Asset and Portfolio Management

WSP provides corporate leaders, portfolio managers and their legal counsel with insight into reducing the cost and complex ity of managing asset and liability portfolios. Our asset and portfolio management professionals, coupled with our com pliance and contaminated land experts, bring comprehensive knowledge of business, structures and buildings, and contami nated media and clean-up requirements and techniques to de velop cost-effective programs for managing complex challenges. Brownfield and Property Development WSP’s collaborative approach to risk-based remedial services provides maximum flexibility to developers undertaking brownfield redevelop -

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ment projects. We quickly review available data, provide comprehensive analysis of associated risks and evaluate future site uses to anticipate the path to completion and keep projects on schedule. PFAS Contamination Identification and Remediation We have specialized expertise managing ubiquitous and persistent per- and polyfluoroalkyl (PFAS) substances. Our team has multi disciplinary capabilities and experience to interpret the evolving financial, legal and regulatory landscape; recognize and define current and likely future obligations; and minimize impacts on transactions, operations and employees. We regularly incorpo

rate PFAS into Phase 1 environmental site assessments and have the experience to investigate and remediate PFAS. In Situ Remediation WSP’s approach to in situ remediation is practical, yet aggressive. It includes collecting cost-effective, predictive, and actionable data using advanced diagnostics before remedy implementation. The WSP philosophy of practi cal innovation is regulatory closure-focused and often intended to replace costly, underperforming technol ogies. We have a track record of in situ remediation projects that meet or exceed expectations.

Sediment Remediation and Dredged Material Management

From harbors to river basins, lakes and wet lands, we have extensive experience devel oping the most sustainable, cost-effective and environmentally suitable solutions. We perform permitting, site screening and sediment characterization, and identi fy beneficial use opportunities such as marsh creation or habitat restoration.

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OLIN SUPERFUND SITE McIntosh, Alabama

Olin Corporation and BASF Corporation (Olin/BASF) jointly engaged WSP to serve as supervising contrac tor and to undertake the Remedial Design (RD) and Remedial Action (RA) of the remedy specified in the EPA Record of Decision (ROD) for the Olin Superfund Site Op erable Unit 2 (Olin OU-2), located in McIntosh, Alabama. Previous investigations at the Olin OU-2 site have docu mented the presence of mercury, hexachlorobenzene (HCB) dichlorodiphenyltrichloroethane (DDT) and its isomers and degradation products (collectively DDTx) in soil, surface water, groundwater, biota, and sediments at the site, collectively con stituents of concern or CoCs. The previous studies have generally documented the lateral extent of CoCs in sediments to a degree sufficient for the EPA to establish the preferred remedy as a cap/ cover over the impacted sediments. Project Elements 9 Sediment remediation

9 Site investigations 9 Remedial design 9 Feasibility study 9 Field sampling and testing 9 Laboratory testing 9 Environmental risk assessment

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PLANT GORGAS ASH POND CLOSURE Birmingham, Alabama

The Gorgas Ash Pond closure project is a large and complex CCR clo sure project. The site is a historic wet sluiced (~ 400 acres) ash pond with greater than 22 M CY of CCR at deposit thicknesses of over 140 feet deep. The project includes a hybrid closure design combining removal of CCRs from more sensitive areas near adjacent rivers and consolidation and per manent capping of the CCR materials on-site. The Gorgas closure solution incorporates an innovative application of dredging to a paste thickening plant for material handling and placement to significantly increase pro duction and safety. WSP was retained to provide engineering services for the closure. Ser vices included closure options assessments, permitting support, geotech nical assessment (including detailed in-pond investigation and material characterization), construction instrumentation and monitoring plan, groundwater modeling and site CSM development, beneficial use testing/ mapping and landfill engineering that included hydrology and hydraulics, geotechnical engineering (including seismic, slope stability and seepage assessment), dam engineering (including a new RCC attenuation dam), construction phasing, and engineering support during construction.

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PETROLEUM SITE CLEANUP PROGRAM Escambia County, Florida

Under a multisite, multitask contract, WSP provided environmental investigation and remedial planning services for petroleum-contaminated sites. The pro gram included field investigation to determine the extent of soil and groundwater contamination and delin eate contaminant plumes; evaluation and design of reme dial alternatives; and preparation of contamination assess ment reports and remedial action plans. Team members also provided construction management and operated and maintained groundwater and soil treatment systems. Repre sentative sites are described below. 9 Rhodes Food Mart and Conoco No. 9070 9 Nugget No. 2 9 Vardemann’s Tire Service 9 Barbers Pure Milk and Sheriff Substation 9 Tom Thumb No. 75 9 Kwik Shot No. 6 9 Pensacola Site Investigations

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PAPER MILL LANDFILL CLOSURE Wyoming County, West Virginia

Project involved the remediation of a landfill at a paper mill built in the 1940s that experienced excessive settlement and a slope failure. The mountainside landfill had closure slope of one horizontal to one verti cal. The WSP team determined the most cost effective and technically proficient way to re-close the landfill while simultaneously minimizing the volume and quality of leachate generated from the landfill, which is treated in an on-site wetlands system. As the Engineer of Record, our team provided a multitude of services including geotechnical studies, hydrologic studies, design services, bid ding services, and the preparation of plans, specifications, and contract documents. Services performed included geotechnical field investigations, slope stability determinations, leachate generation modeling, wetlands treat ment system modeling, and regulatory interface. The remote site was inaccessible for standard construction methodology; therefore, our team designed a synthetic cover system for the landfill that required less cover soil to install and provided a low maintenance cover system during the post-closure period. Our team prepared a site-specific Stormwater Pollution Prevention Plan (SWPPP), which included a series of temporary down-gradient storm water collection basins for collecting sediment during construction. At the completion of the project, a closure report was submitted to and approved by the West Virginia Department of Environmental Protection (WVDEP).

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Rapid PFAS Remediation Facilitates Sale and Redevelopment, New Jersey

While conducting due diligence for the purchase of a former fragrance manufacturing facility in Avenel, New Jersey, WSP identified historical discharges from an aqueous film forming foam fire suppression system. Follow-up investigations identified PFAS contamination in soil and groundwater. To facilitate the property transaction, we managed dewatering, excavation and off-site disposal of over 10,000 tons of contaminated soil under the requirements of the New Jersey Licensed Site Remediation Program.

Hexavalent Chromium Affected Deep Soil, Kansas

A manufacturing company and primary employer in a rural Kansas town was facing a $5 million price tag to clean up a legacy hexavalent chromium release using conventional technologies proposed by others. With the aid of threedimensional data visualization software, WSP developed an innovative, minimally intrusive strategy to keep the facility operational during site clean-up activities at a fraction of the conventional technology cost.

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In Situ Treatment Replaces Costly Pump and Treat at RCRA Site

WSP designed and installed a passive ground water treatment system to address chlorinated volatile organic compounds in fractured bed rock groundwater. The passive system replaces underperforming hydraulic containment and saves the client more than $100,000 per year in operation and maintenance costs for the now abandoned pump and treat system.

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