CTR072296_Amendment_8_-_Adds_Key_Personnel.pdf

REV.03-05-2025

CONTRACT

AMENDMENT

CONTRACT NO.: CTR072296

AMENDMENT NO.: 8

TITLE: ASRAC Assessment and Remediation of Hazardous Substances CONTRACTOR: CDM Smith, Inc.

ADEQ PROCUREMENT

1110 W. Washington Street Phoenix, AZ 85007 602-771-4140

THE PURPOSE OF THIS AMENDMENT IS TO:

In accordance with the Uniform Terms and Conditions, 5.1 Amendments, this contract is hereby amended as follows:

1. Revises the Personnel Classifications for the following key Personnel:

• Robert Alexander from Professional Level IV to Professional Level V

• Jeffrey Bamer from Professional Level V to Professional Level VI

• Neil Smith from Professional Level IV to Professional Level VI

2. All other Requirements, Specifications, Terms and Conditions remain unchanged.

THE ABOVE REFERENCED AMENDMENT IS A

UNILATERAL ACKNOWLEDGEMENT OF

CONTRACTOR’S APPROVED CHANGED

REQUEST.

ARIZONA DEPARTMENT OF ENVIRONMENTAL QUALITY

The above referenced Amendment is hereby executed this 24th day of September 2025 at Phoenix, Arizona.

Ana Machiche Contract Manager

Available online at Arizona Procurement Portal (APP) eProcurement System https://app.az.gov https://app.az.gov/

Robert R. Alexander, PG, CHMM Principal, Senior Environmental Scientist

Mr. Alexander is an environmental scientist with 34 years of diverse experiences, including environmental project management, site investigations, preparation of decision-making documents, remedial investigation/feasibility studies, environmental emergency response, remedial action oversight, and compliance and other inspections. He has helped to develop field work plans and related investigation documents, and has led or participated in numerous field efforts. He has conducted diverse projects for the Environmental Protection Agency (EPA), Department of Transportation, Department of Energy, Forest Service, and Department of Defense. In addition, he serves as the quality assurance coordinator and health and safety coordinator for the Helena, Montana office.

Remedial Investigations/Feasibility Studies Technical Specialist & Environmental Scientist, Cimarron Mining Company Site Remedial Investigation, Feasibility Study & Remedial Action, U.S. Environmental Protection Agency (NM). Served as a technical specialist and environmental scientist and participated in a variety of sampling efforts at this site and its operable unit, the Sierra Blanca milling site. He collected samples of sludge from the septic system, soil and waste samples, and treatability study samples. He also supervised the installation of recovery wells to remove cyanide-contaminated groundwater as part of the remedial action at the Cimarron site. Project also included a sampling and analysis plan, health and safety plan, and both remedial investigation and action plans.

Project Manager/Scientist, U.S. EPA Region VIII, Expedited Response and Remedial Actions within the Silver Bow Creek/Butte Area NPL Site, Butte, Montana. These projects include potentially responsible party (PRP) oversight of expedited response actions involving the removal of over 1-million cubic yards of mill tailings at the Lower Area One Operable Unit (OU) and the implementation of a unique remedial action at the Rocker Timber Treating Plant utilizing iron to treat arsenic-containing source materials.

Also, arsenic and lead in residential yards were addressed under the Priority Soils NTCRA and railroad bed response actions under the Railroad Beds TCRA. Activities within these assignments included preparing action/enforcement memorandums, reviewing design and project completion reports prepared by the PRP group, evaluating solid and aqueous media data, and community relations involvement.

Environmental Scientist, U.S. EPA Region VIII, RI/FS for the Silver Bow Creek/Butte Area NPL Site, Butte, Montana. For the Butte Priority Soils OU, Mr. Alexander was an environmental scientist for preparation of a remedial investigation/feasibility study (RI/FS), sampling and analysis plans for soils sampling, surface water sampling and synoptic flow measurements of the Metro Storm Drain, and mercury vapor screening. He participated in the field survey of the unreclaimed areas program and was lead scientist for the field team that sampled areas identified during the survey. He developed re-vegetation specifications for upland mine wastes, and helped develop reclamation evaluation and success criteria. He assisted in the development of the draft and final record of decision (ROD) for the EPA and reviewed the RI and FS reports prepared by the PRP group. With the completion of the ROD, his focus at the site shifted to implementing the selected remedy, including assisting with the development of the groundwater

Education MS - Geology, New Mexico Institute of Mining and Technology, 1991

BS - Geosciences, University of Arizona, 1984

Registration Professional Geologist:

Washington (2002), Arizona (No. 81751;

2024)

Certifications Certified Hazardous Materials Manager, Asbestos Inspector:

Montana, 2000 monitoring plan and implementation of the reclamation evaluation system for upland areas. He was also a member of the CDM project team that developed the National Remedy Review Board package for EPA.

Environmental Scientist, U.S. EPA Region VIII, Upper Tenmile Creek Mining Area NPL Site, Lewis and Clark County, Montana. The site consists of mine waste contamination from historic mining facilities in upper Tenmile Creek and its tributary basins whose surface waters provide approximately 80 percent of the water supply for the City of Helena, Montana. Mr. Alexander’s support ranged from developing sampling plans and other project reports and evaluating the nature and extent of contamination, to providing design and field oversight services for residential and mine site remedial actions. During the course of this project, unique soil handling and sieving procedures were developed, which eliminated several decontamination and sample handling steps, thus allowing rapid sample turn around times for metals using x-ray fluorescence (XRF) spectrometry. As a result, above certain detection limit ranges, and near laboratory quality results were achieved. In addition, Mr. Alexander prepared CDM Smith’s standard operating procedure (SOP) for field portable XRF analysis of solid media. He served as the lead designer of residential yard removal actions at the Landmark Subdivision for the 2008 remedial action project. In 2008, he managed and operated the PM2.5 ambient air monitoring program during remedial actions implemented in residential areas.

Environmental Scientist, U.S. EPA, Region VIII, Neihart Community Soils Area Operable Unit, Carpenter-Snow Creek Mining District NPL Site, Neihart, Montana.

Mr. Alexander served as task leader for the 2008 residential area environmental evaluation. He prepared the sampling and analysis plan and then led the sampling team that characterized 60 residential properties within a 2-week timeframe.

Environmental Scientist, U.S. EPA, Region VIII, Basin Mining Area Superfund Site, Basin, Montana. This project involved the reconnaissance of numerous abandoned mine areas in the watershed north of the Town of Basin; sampling and analysis of soil/waste materials, sediments, and surface water; and the collection of various field measurements.

In the Town of Basin, Mr. Alexander conducted removal and replacement of contaminated soil from residential yards, including activities such as staking removal locations, surveying the quantity of soil removed from each yard, and conducting confirmation sampling.

Environmental Scientist, U.S. EPA Region VI, RI/FS for the Sprague Road Ground Water Plume Site, Odessa, Texas. This RI/FS involved the investigation and assessment of three inactive or abandoned chromium plating facilities. These metal plating operations were the source of chromium contamination in groundwater used for drinking water in a residential and light industrial area. Mr. Alexander supervised the drilling and installation of groundwater monitor wells and the installation of soil vapor wells to assess organic contamination at one of the facilities. He also performed residential groundwater sampling and assisted with preparing the RI/FS report.

Project Manager/Environmental Scientist, U.S. EPA Region VIII, Anaconda Smelter NPL Site, All Phases of CERCLA process, Anaconda, Montana. This project involved a multiple operable unit site containing several hundred million cubic yards of milling and smelting wastes and tens of square miles of soils contaminated by arsenic and heavy metals generated from nearly 100 years of smelting activity. Mr. Alexander was responsible for budget tracking, project scheduling, technical resource management, and technical support for six operable units managed by two Remedial Program Managers. Each operable unit was in a different phase of the CERCLA process. He prepared two record of decision documents and associated proposed plans, assisted with initiation and development of the site-wide human health and ecological risk assessments as well as the preparation of preliminary remedial action objectives and alternatives, and the review and rewriting of two separate RI reports prepared by the PRP. He presently serves as a key technical resource as part CDM Smith’s oversight of the implementation of the selected remedy, including developing a groundwater monitoring program, evaluating the effectiveness of the responsible parties’ residential sampling program, and interpretation of historic soil and air data. He conducted an intensive review of historic site data and preparation of a deliverable discussing the development of the contaminants of concern at the site. Currently provides the lead oversight role for the ambient air monitoring program in the area of the Opportunity Ponds utilizing Wedding & Associates and Met One E-BAM monitors sampling for PM10 particulates.

Field Leader, U.S. EPA Region VI, American Creosote Site, Remedial Investigation/Feasibility Study, Winnfield, Louisiana. This project consisted of an abandoned, 40-acre former wood treating site with NAPL contaminated soil, groundwater, and sediments. Mr. Alexander served as field leader of the groundwater sampling effort and assisted with the project's sampling and analysis plan. He collected surface/subsurface soil and stream sediment samples, supervised the installation of monitor wells, and characterized the extent of soil contamination for the RI report. The investigation was part of a successful SACM model project.

Field Investigation Manager, Batelle EMO, Focused Remedial Investigation, Tinker Air Force Base, Oklahoma City, Oklahoma. Consisting of an active aircraft repair facility, this site has groundwater and soils contaminated with organic solvents, electroplating wastes, alkaline cleaners, acids, freon, jet fuels, and radioactive paints. Mr. Alexander led the field effort for the focused RI at Landfill No. 6, which studied the sources of chloride, sulfate, and total dissolved solids in the area around the closed landfill and oil and gas wells. He prepared the sampling and analysis plan, supervised the installation and sampling of monitoring wells, and prepared the sections on geology and source identification in the Focused RI Report.

Environmental Scientist, U.S. EPA Region VI Cimarron Mining Company Site, Remedial Investigation/Feasibility Study and Remedial Action, Carrizozo, New Mexico. Mr. Alexander participated in a variety of sampling efforts at this site and its operable unit, the Sierra Blanca milling site. He collected samples of sludge from the septic system, soil and waste samples, and treatability study samples. He also supervised the installation of recovery wells to remove cyanide-contaminated groundwater as part of the remedial action at the Cimarron site.

Other Investigation and Compliance Projects Arizona Department of Environmental Quality – Various Projects. Mr. Alexander serves as a senior quality assurance reviewer for project deliverables for several projects under CDM Smith’s ASRAC contract including: 51st and Camelback, Bahama & Bimini, and West Van Buren.

Environmental Scientist, U.S. Army Corps of Engineers, Seattle District, Defense Environmental Restoration Program for Formerly Used Defense Sites. As part of an initiative identifying, evaluating, and remediating hazards to human health and the environment created by past military activities on properties formerly controlled by the Department of Defense, Mr. Alexander inspected and evaluated about a dozen World War II era practice bombing ranges and several former Army Airfield facilities in Idaho and Montana. The property screening involved document searches, interviews, field visits, preparing detailed trip reports, and draft and final reports. Was member of project team that was recognized for the development of a remedial action work plan for the Glasgow Army Airfield in Glasgow, Montana, in 2007.

Environmental Scientist, U.S. EPA Region III, Capitol Hill Anthrax Emergency Response, Washington, DC. As member of the CDM field team, Mr. Alexander provided sampling and analytical support to EPA during the massive, 4½-month effort to respond to the release of anthrax spores in the Hart Senate Office Building (HSOB). The majority of the effort encompassed the preparation, placement, and collection of over 25,000 spore strips in the HSOB, and in bagged personal property, critical items, and mail.

Field Team Leader/Environmental Scientist, U.S. Department of Transportation John A. Volpe Transportation Systems Center, Libby Asbestos Project Emergency Response, Libby, Montana. Mr. Alexander led the initial and subsequent emergency response soil sampling activities for tremolite asbestos in residential yards and former vermiculite mining and industrial facilities operated by W.R. Grace and Co. He assisted with the development of the initial sampling and analysis plan, data summary reports, database development, and special sample preparation and splitting procedures. He prepared the removal action sampling and analysis plan for one facility, contributed to the development of plans and specifications for the removal action, assisted with oversight of soil removal at commercial and residential properties, and assisted with the search to find suitable borrow material to replace excavated contaminated soils. He also served as a quality assurance auditor evaluating sampling techniques and project documentation. He assisted the pre-design removal teams with evaluating conditions at residential properties and providing the information necessary for the design team to prepare plans and specifications. In 2006 to 2008, he was part of the team investigating ambient air conditions in Libby and periodically serves as a construction inspector during residential removal operations. Most recently conducted an audit of the asbestos landfill groundwater monitoring program.

Environmental Scientist, HAZWRAP-DOE, Base Closure Investigation for Norton AFB, San Bernardino, California. Mr. Alexander participated in several field activities that eventually led to the transfer of the base to the City of San Bernardino and the county. This work included oversight of soil gas sampling activities, the collection of soil and groundwater samples, and management, handling, and disposal of investigation derived wastes.

Field Investigation Manager, Batelle EMO, RCRA Closure Investigation, White Sands Missile Range, New Mexico. CDM conducted RCRA closure investigations for two practice bomb disposal areas. Mr. Alexander was responsible for the preparation of the health and safety plan and assisted with the development of the sampling and analysis plan, site evaluation report, and closure reports. He provided oversight of the geophysical investigation and supervised the surface/subsurface soil sampling effort.

Environmental Scientist, U.S. Forest Service, Property Transfer/Preliminary Assessment Investigations, Arizona and New Mexico. Mr. Alexander performed two property transfer investigations and prepared preliminary assessment reports of four former mining sites on Forest Service property. The work included field reconnaissance visits for photo documentation and collecting field parameter data for possible future investigations.

Environmental Scientist, U.S. DOE, Sandia National Laboratories, Regulatory Compliance Projects for, Albuquerque, New Mexico. Mr. Alexander participated in the development of the facility-wide NPDES Stormwater Discharge Permit and Oil Spill Contingency Plan. He performed the Oil Spill Control and Countermeasure inspections and served as site Health and Safety Officer during the subsurface investigation of radioactive, chemical, and mixed-waste disposal areas.

Assistant Hazardous Waste Director, New Mexico Institute of Mining and Technology, Regulatory Compliance, Socorro, New Mexico. Mr. Alexander prepared documentation for hazardous waste shipments and regulatory compliance. He consulted on PCB, asbestos, and other problems, and served as Acting Hazardous Waste Director during extended absence of the supervisor.

Professional Activities Member, New Mexico Hazardous Waste Management Society, 1987-1993

Member, National Asbestos Council, 1986-1989

Member, American Society of Professional Estimators, 1984-88

Member, National Association of Environmental Professionals, 1994-1998

Member, American Chemical Society, 2001-2003

Member, American Society of Mining and Reclamation, 2003-present

Member, Institute of Hazardous Materials Management, 2004-present

Member, Lake Helena Watershed Group, 2008-present

Presentations Karas, P.A. and R.R. Alexander. RCRA Closure Plans for Two Practice Bomb Disposal Areas.

Presented to New Mexico Hazardous Waste Management Society Conference, Albuquerque, New Mexico, March 1993.

Alexander, R.R. Overview of the Railroad Bed Time-Critical Removal Action Silver Bow Creek/Butte Area Superfund Site. Presented at the poster session of the 9th Billings Land Reclamation Symposium, Billings, Montana, May 2003.

Alexander, R.R. Standard Upland Revegetation Specifications for the Butte Priority Soils Operable Unit, Silver Bow Creek/Butte Area Superfund Site, Butte, Montana. Paper presented at the 10th Billings Land Reclamation Symposium, Billings, Montana, June 6, 2006.

Jeffrey T. Bamer, PE Associate, Environmental Engineer

Discipline Leader – Remedial Design Mr. Bamer is a senior environmental engineer with 24 years of experience in the planning, design and application of in situ and ex situ soil, groundwater and soil vapor treatment systems and remediation processes, and oversight of construction, and serves as CDM Smith’s Discipline Leader for Remedial Design. He has experience in evaluating complex site data, developing design alternatives and cost estimates, managing design development, integrating input from multi-disciplinary teams to create effective remedial designs, permitting the construction and discharges of these systems, implementing these designs via conventional (design/bid/build) and alternative (design/build) delivery means, implementing and overseeing operation and maintenance (O&M) activities, optimizing existing systems, and performing third-party reviews. Mr. Bamer has provided these services to federal and state agencies, Fortune 100 industrial companies, and several multi-party PRP groups. Project sites have included petroleum refineries, former and active industrial manufacturing facilities, recycling facilities, and CERCLA groundwater basins, with a wide variety of contaminants, including chlorinated solvents, 1,4-dioxane, PFAS, perchlorate, petroleum hydrocarbons, dioxins, metals, pesticides, and other VOCs.

Mr. Bamer has also presented at several national remediation conferences.

He has experience with biotic and abiotic remedial processes, and with pilot testing and scale-up. He has experience and familiarity with a wide range of in situ and ex situ treatment technologies, including thermal conductive heating (TCH) and electrical resistive heating (ERH) thermal remediation technologies, in situ enhanced anaerobic bioremediation (EAB) via injections and biorecirculation, in situ sparging and biosparging, sub-slab depressurization (SSD) for vapor intrusion mitigation, soil vapor extraction (SVE), in situ chemical oxidation (ISCO), dual/multiphase extraction (DPE/MPE), air stripping, granular activated carbon (GAC), potassium permanganate zeolite, advanced oxidation processes (AOPs), ion exchange (IX), multimedia filtration, granular ferric hydroxide (GFH) for arsenic treatment, fluidized bed reactors (FBR) for ex situ biological treatment, and macro-porous polymer extraction (MPPE). Mr. Bamer has also worked on multiple projects with innovative PFAS treatment technologies, including foam fractionation, electrochemical oxidation, soil washing, and in situ stabilization.

His specific technical experience also includes performing process design calculations, writing process control descriptions, creating process flow and piping and instrumentation diagrams, and mechanical layouts, planning and implementing in situ bioremediation slug injections and biorecirculation systems, often in challenging soil matrices and target areas, overseeing thermal remediation contractors, pilot testing, operating, maintaining, and optimizing remediation systems, and air dispersion modeling and permitting. Mr. Bamer also has experience with project and task management, health and safety planning, construction stormwater management, supervision and execution of typical environmental field tasks including soil and groundwater sampling, drilling, and performing underground storage tank removals and site assessments.

Education

MS – Environmental Engineering, University of California Berkeley, BS – Engineering with Honors, Harvey Mudd College, 2000

Registration

Professional Engineer:

Washington (2005), Colorado, Indiana

Certifications

40-hour OSHA Hazardous Waste Health and Safety Training, 2001, and 8-hour Refreshers

OSHA Hazardous Waste Health and Safety Supervisor Training, 2002

OSHA 10-hour Construction Safety and Health Training, Project Technical Lead and Design Engineer, Remedial Design, and Project Manager, Operation and Maintenance Activities and System Expansion, Los Angeles, California. Mr. Bamer has served a variety of roles on CDM Smith’s multi-year, multi-million-dollar contract for the West Side of the El Monte Operable Unit of the San Gabriel Valley Superfund Sites, where regional groundwater is impacted with chlorinated solvents, nitrate, perchlorate, and low levels of chromium (IV). Mr. Bamer served as the process engineer in the design of a groundwater treatment system that includes an anaerobic fluidized bed bioreactor (FBR) and liquid-phase granular activated carbon. Mr. Bamer also successfully developed arguments to the EPA and the Regional Water Quality Control Board to not require treatment of settleable solids (biological floc), which saved the client over $1 million and approximately two years of schedule. He also collaborated with a vendor to plan and perform treatability tests on a novel application of FBR technology:

reduction of hexavalent chromium. He further successfully negotiated discharge permitting with the County of Los Angeles Flood Control District and the Los Angeles Regional Water Quality Control Board. After the design was complete, Mr. Bamer worked with the owner and CDM Smith’s construction team as the project proceeded through design-build-operate delivery. He reviewed appropriate products and vendor submittals and developed a specialized startup procedure that successfully facilitated growth of the bacteria in the reactor without risking non-compliant discharge during startup.

Mr. Bamer also serves as the project technical lead on the ongoing O&M and the system upgrade design efforts being performed by CDM Smith. Completed upgrades include the addition of an advanced oxidation process (AOP) reactor to treat high concentrations of 1,4-dioxane not observed during the pre-design site characterization, an additional influent nitrate sensor to optimize FBR operation, and multiple other optimizations. Most recently, Mr. Bamer served as the design lead on a design/build project to expand the groundwater extraction well network. Regional drought conditions changed groundwater flow gradients, necessitating additional extraction wells to achieve complete containment.

The expanded system is currently in startup.

Project Engineer, Assessments and Engineering Designs and Plans for Thermal Remediation of Dioxin Contamination at Da Nang Airport, and Construction Management and Oversight of Dioxin Remediation at Danang Airport, Vietnam;

USAID-Vietnam. As part of preliminary design activities associated with implementation of novel in-pile thermal desorption (IPTD) for approximately 100,000 cubic meters of dioxin-contaminated soil and sediment associated with historical activities associated with Agent Orange handling at the Da Nang airport, Mr. Bamer used site analytical data to estimate which areas required excavation, and the total amount of material that required treatment. Mr. Bamer also reviewed thermal treatability study data and provided recommendations to the thermal contractor’s design team on further testing. As the project moved closer to implementation, he reviewed the thermal design contractor’s design, including the design of the treatment system that would be needed to treat the off-gas and leachate from the pile during thermal treatment. This involved review of design reports, cost estimates, drawings, and technical specifications. Mr. Bamer provided comments and recommendations associated with process changes, which led to reassessment of the treatment approach and additional treatability testing to verify sufficient removal of high concentrations of organics from the off-gas condensate.

During the implementation phase, Mr. Bamer provided technical input to the team regarding heating of the pile, protection of the pile from water infiltration, water and off-gas treatment strategies and related O&M issues, process, pile and excavation confirmation sampling using Increment Sampling Methodology, and other miscellaneous topics. Mr.

Bamer also reviewed technical documents and helped the team troubleshoot miscellaneous technical issues. Upon completion of the work, Mr. Bamer performed a mass balance on the dioxin and determined that approximately 72% of the initial dioxin mass was destroyed in the pile, and 26% of the mass was extracted as non-aqueous phase liquid.

Mr. Bamer presented these results as part of some of the final stakeholder meetings.

During this project, Mr. Bamer also served as part of the team conducting capacity building work conducted on behalf of USAID to teach Vietnamese government officials about remediation. Mr. Bamer performed three different trainings on data analysis, remedial strategy and feasibility analysis, implementation, and risk management.

Project Engineer, Hawthorne, California. Mr. Bamer serves as a senior engineer on CDM Smith’s contract to provide program management of environmental work at a confidential industrial facility in Hawthorne. The site is a large site with complex hydrogeology, multiple sources, and existing remediation equipment. CDM Smith’s work started with a pilot test that had been initiated by a previous consultant and that had become fouled and functionally inoperable. After encountering significant difficulty getting approval from the Regional Water Quality Control Board, CDM Smith developed alternative strategies to get the pilot test operational. Mr. Bamer developed modifications of the ex situ equipment and biofouling management tactics to prevent biofouling in the new injection well. Wells at the site responded to the modified approach, with electron donor distribution and complete reductive dechlorination to ethene in many site wells. The client revised their site strategy completely based on these results and promoted CDM Smith into a program manager role for the large complex site.

Since that time, CDM Smith has implemented full-scale bioremediation under the facility and in another portion of the facility as well. Mr. Bamer led the design of both systems, both of which have been installed and are operational. Mr. Bamer also worked with the property owner to modify the mechanical details of the design to maximize the future beneficial reuse of the property and minimize the potential for damage to the system during future facility modifications, and coordinated with another consultant who had previously installed a soil vapor extraction (SVE) and dual-phase extraction (DPE) system to remediate a different stratigraphic zone, which also needed to be rerouted due to future facility modifications.

Mr. Bamer developed a Sampling Analysis Plan (SAP) based on implementation of Monitoring Natural Attenuation (MNA) for a different portion of the site and used a Mann Kendall analysis with contingency action triggers to argue that previously planned active remediation was not needed. Mr. Bamer also developed a two-phase extraction (TPE) pilot test work plan for a different portion of the site.

Design Manager and Project Engineer, Remedial Design, Whittier, California.

Mr. Bamer served as a project engineer under CDM Smith’s contract to perform various services for the client, a potentially responsible party (PRP) group of approximately 140 parties who EPA deemed responsible for the remediation of the Omega Chemical Superfund site. Mr. Bamer led the design of an interim soil-vapor extraction (SVE) system for the immediate source area to minimize migration of subsurface contamination into buildings and remove VOC mass from the subsurface. He was the technical lead on a dual-phase extraction (DPE) pilot test and designed a second interim SVE remedy for other portions of the site. Mr. Bamer led the design of full-scale remedial approach that incorporated and expanded the existing interim SVE systems with the addition of new DPE wells. The DPE wells were connected to an existing groundwater treatment system designed to contain the highly impacted groundwater in the source area. Mr. Bamer developed optimization strategies that resulted in aggressive mass removal and reduction of VOC concentrations throughout the subsurface. Mr. Bamer also provided ongoing technical support for O&M issues.

Overall, the systems have successfully accomplished their remedial objectives and are in various phases of shutdown testing. The second SVE system successfully removed sufficient mass to protect indoor air spaces, underwent rebound testing, and has been closed and decommissioned. The first SVE system removed over 10,000 pounds of contamination, successfully protected indoor air above the site, and is now in its second year of successful rebound testing. Soil and soil gas samples have indicated that it reduced concentrations by two to three orders of magnitude (99 to 99.9% reduction). As a result of this mass removal, groundwater concentrations have also dropped significantly, and Mr.

Bamer is currently supporting efforts to secure regulatory approval of a temporary shutdown of the groundwater system to conduct further testing.

Prior to the second SVE system coming online, Mr. Bamer also designed multiple interim subslab depressurization systems to reduce indoor air concentrations. Mr. Bamer also did a design for a subslab depressurization / Liquid Boot® membrane system for a skating rink that was never installed (the parcel was purchased, and the building was demolished).

Project Manager/Project Technical Lead, Focused Feasibility Study and In Situ Chemical Oxidation Pilot, Chemical Sales Superfund Site, Denver, Colorado. Mr.

Bamer served as the Project Manager on CDM Smith’s contract with Colorado Department of Public Health and the Environment (CDPHE) to develop a focused feasibility study for addressing 1,4-dioxane concentrations that were identified within the footprint of a site that had previously moved through the CERCLA process for VOC contamination. Previous efforts at the site to address the 1,4-dioxaane via in situ chemical oxidation (ISCO;

specifically catalyzed hydrogen peroxide) had not been successful and CDM Smith was hired to leverage its knowledge of all remedial options, both conventional and novel, to develop a path forward for the State within a Focused Feasibility Study (FFS). Other tasks included reviewing all available site data and developing remedial action objectives. In addition to project management duties, Mr. Bamer authored sections of all deliverables and coordinated meetings with the state and EPA. The submittal of the Draft Final FFS led to a second contract to conduct follow-on site investigation, and the planning and implementation of an ISCO using solid phase potassium permanganate and lime, emplaced as a slurry with hydraulic fracturing. During the pilot, over 30,000 pounds of potassium permanganate and14,000 pounds of hydrated lime were emplaced in 5 borings and 28 fractures. CDM Smith is currently performing monitoring of the pilot to assess effectiveness.

Project Engineer, Environmental Assessment at Bien Hoa Airbase, Vietnam; USAID- Vietnam. Mr. Bamer served on a multidisciplinary team that investigated a large dioxin-contaminated site (resulting from Agent Orange use) at the Bien Hoa Airbase near Ho Chi Minh City, Vietnam. The team evaluated existing environmental data for the site, developed the conceptual site model, planned and conducted an 11-week environmental sampling investigation that was unprecedented in Vietnam, and prepared an Environmental Assessment (EA) that documented the improved site conceptual model. The EA also presented multiple remediation alternatives with treatment and containment technologies. Mr. Bamer authored sections of the Environmental Scoping Statement that focused on the conceptual site model and planned evaluation of alternatives within the EA, and helped develop the first Sampling and Analysis Plan, in which Multi Increment® Sampling is specified to determine the nature and extent of dioxin impact at the site. Once the data were received, Mr. Bamer helped assemble the revised conceptual site model, evaluated various remedial technologies, developed alternatives, reviewed calculations of contaminated volumes of sediment and soil, and presented this work in stakeholder meetings and consensus building activities.

Project Technical Lead, Interim Measures and A&E Services at Bien Hoa Airbase, Vietnam; USAID-Vietnam. Mr. Bamer served as the Project Technical Lead on the design and implementation of interim measures near some of the most contaminated portion of the site, to minimize migration to offsite residential communities.

Senior Engineer, USAID-Vietnam, Architect–Engineer Services II for Dioxin Remediation at Bien Hoa Airbase Area (A&E II) Activity (2023-Current). Mr. Bamer serves as a senior engineer providing review of planning and design documents developed by USAID selected thermal treatment contractor. Mr. Bamer has reviewed design drawings and calculations, sampling plans, design reports, environmental mitigation and monitoring plans, mass balance plans, and other related documents. Mr. Bamer oversaw pilot testing of thermal treatment equipment and has worked closely and collaboratively with the treatment contractor to improve aspects of their planning and design documents. Mr.

Bamer also participated in the final design workshop with Vietnamese government officials to successfully secure their approval for the design.

Principal Investigator, Passive Stormwater PFAS Treatment Demonstration, Air Force Civil Engineering Center (AFCEC). Mr. Bamer is leading a demonstration of passive treatment of PFAS-laden stormwater at Dobbins Air Reserve Base. Bench scale rapid small scale column tests evaluated anionic exchange resin (AER), GAC, and anti-microbial media to optimize performance and longevity. The pilot design includes a self-cleaning inlet, layered prefiltration, and a backwashable AER/anti-microbial media bed.

Project Engineer, Electrochemical Oxidation Research and Development Project, CDM Smith, Denver, Colorado. Mr. Bamer served in an internally funded research and development (R&D) project, where CDM Smith scaled up previous bench-scale PFAS electrochemical oxidation experiments and built a new pilot skid. Mr. Bamer worked to develop the conceptual design and detailed process design, including process calculations, a simple piping and instrumentation diagram, a control narrative, and an electrical design basis, a full bill of materials for all process and instrumentation equipment, and a contracting strategy to procure a control panel for the equipment. Mr. Bamer was part of the team that built the system also. The skid is portable and flexible enough to be integrated into different future testing efforts.

Project Technical Lead, Foam Fractionation of PFOS/PFOA-Contaminated Surface Water and Soil Treatability Studies, Schriever Space Force Base, Colorado. Mr. Bamer served as the Project Technical Lead on a project to explore three potential remedial technologies for PFAS contamination at Schriever SFB: foam fractionation, electrochemical destruction, and soil washing. A dry lagoon with PFAS-contaminated soils and sediment from a former fire training area were characterized using a combination of discrete/grab soil sampling and incremental sampling methodology to improve data repeatability and reliability. Soil washing bench scale testing of soils showed effectiveness but washing of sediment was not effective because of high organic content from algae. Soil wash water was successfully treated using bench scale foam fractionation. Results from the assessment were documented in a report and white paper for Air Force and USACE use for future sites.

Senior Engineer, Foam Fractionation Bench and Pilot Test, Confidential Client, New York. CDM Smith conducted the first-ever pilot test of the surface active foam fractionation (SAFF®) PFAS treatment technology in North America. SAFF uses air injection to separate and concentrate high volumes of water with low-concentration PFAS into small volumes of foam fractionates that are easier to manage. The pilot test was conducted to evaluate the effectiveness and feasibility of removing PFAS from two different sources at the site:

groundwater with high concentrations of PFAS near the AFFF source area, and groundwater already extracted and treated by an existing onsite air stripper. CDM Smith conducted bench-scale testing using the site groundwaters and observed multi-log reduction of PFAS following optimization with addition a surfactant to improve foaming.

CDM Smith then mobilized a 100-gpm SAFF pilot system to the site and was able to treat ~265,000 gallons of water, achieving a volumetric reduction of 90,000X, total PFAS removal rates up to 97% and 98% for the two groundwater types, and removal of the added surfactant. Foam fractionates were sent to the CDM Smith’s Denver treatability lab for treatment by electrochemical oxidation. The electrochemical oxidation pilot unit was able to achieve between 2- and 4-log destruction of PFAS and 99% total organic fluorine reduction in 16 hours. Mr. Bamer was responsible for providing senior technical input during this project, including review of bench scale treatability data and testing plans, interfacing with the SAFF technology vendor, providing operational troubleshooting assistance, review of data and client presentations, and design and construction of the pilot system.

Project Technical Leader, Environmental Mitigation Pilot Program, Grand Rapids Airport, Michigan. Mr. Bamer is serving as the project technical lead on a project to conduct bench scale and pilot scale treatability testing of stabilization of PFAS-impacted soils using novel adsorbents. Mr. Bamer led development of the technical approach selected by the client, worked to integrate that approach with a fate and transport modeling component to be performed by Michigan State University, and supported the client through their successful attempt to secure matching FAA funding. The team has successfully conducted a high-resolution site characterization (HRSC) investigation and the treatability study. Preliminary treatability results received so far indicate >99.9% reduction in total target PFAS concentrations is simulated surface waters in contact with amended soils. The project has successfully moved through baseline monitoring and onsite soil mixing. Samples collected indicate the mixing has achieving 2-log reduction in total PFAS concentrations in stormwater runoff from test cells.

Process Engineer, ESTCP Project ER21-5124, Low-Cost, Passive In Situ Treatment of PFAS-Impacted Groundwater Using Foam Fractionation in an Air Sparge Trench. CDM Smith is conducting bench-scale and pilot-scale testing of in situ foam fractionation to treat PFAS in groundwater. Mr. Bamer developed the design of the equipment that will be used to sparge the groundwater and generate the PFAS-laden foam, and to recover and separate the foam.

Senior Engineer, PFAS Treatability Studies, Maine, New Jersey, and Rhode Island. Mr.

Bamer has been involved in multiple projects for confidential industrial clients and municipalities who are seeking to understand potential PFAS treatment technologies and are exploring various PFAS concentration and destruction technologies, including foam fractionation, super critical water oxidation (SCWO), electrochemical oxidation, and others. Some of these projects have resulted in field pilots, including SAFF treatment for landfill leachate. Others are still in the planning and evaluation stages.

Senior Engineer, Coast Guard Guidance Memorandum. Mr. Bamer was part of a three-person team that developed a technical guidance memorandum for the Coast Guard with recommendation for management of AFFF/PFAS wastes originating from required testing of on-board fire suppression systems. Mr. Bamer authored sections of the memorandum describing the state of PFAS regulations, no-foam/input-based testing options already in use by airports, and PFAS water separation and destruction options.

Senior Engineer, Various Projects, Kaiser Aluminum, Spokane, Washington. Mr.

Bamer served as the Project Technical Lead and senior engineer on a project to design a 250-gpm groundwater treatment system to address polychlorinated biphenyls (PCBs) present in groundwater. The system included an advanced oxidation process (AOP) that uses ultraviolet (UV) light and hydrogen peroxide to generate hydroxyl radicals that oxidize and destroy the PCBs. Mr. Bamer led an interdisciplinary design team that generated a full process design, drawings and specifications, a 3D mechanical model, detailed mechanical and electrical scopes of work, an O&M Manual and startup plan, and other deliverables that the owner used to successfully build and start the treatment system. Mr. Bamer and the team provided engineering services during construction including submittal review, responding to requests for information, and working with the contractors to incorporate additional scope. Mr. Bamer also leveraged his experience and relationship with the UVAOP equipment vendor to secure help to address equipment issues encountered during startup. The system was fully operational before the regulatory deadline and is now treating water below new effluent limits that are half of the original design target. Mr. Bamer has also provided technical support regarding treatment of PCBs in process wastewaters at the same facility.

Project Technical Lead, Corrective Measures Evaluation and Other Technical Support, Los Alamos National Lab, Los Alamos, New Mexico. Mr. Bamer served as a lead on the development of a Corrective Measures Evaluation (CME) alternatives to improve the existing interim measure (IM) groundwater extraction and treatment system to address hexavalent chromium impacts to deep groundwater in fractured rock. The CME included multiple alternatives for ex situ and in situ treatment of the source area and two different hydrostratigraphic units and was well received by the client and regulators. Mr.

Bamer also lead or supported various other technical support activities, including an evaluation of the existing IM system’s Supervisory Control and Data Acquisition (SCADA) system, PFAS strategy document development, well installation oversight, and others.

Project Engineer, Implementation of Enhanced In-Situ Bioremediation, Remediation of Volatile Organic Compounds (VOC), Confidential Aerospace Manufacturer Facility, Los Angeles, California. Mr. Bamer served as a project engineer under CDM Smith’s multi-year, multi-million-dollar contract to provide various services associated with the remediation of groundwater impacted by chlorinated solvents and other VOCs at the client’s former facility. One of the major tasks accomplished included implementation of a biorecirculation pilot system via design-build delivery by CDM Smith, which demonstrated successful biorecirculation at the site. Mr. Bamer’s responsibilities included development of design calculations and drawings. He oversaw operation and maintenance, prepared monthly reports for the client, assisted with troubleshooting efforts associated with system biofouling, plant hydraulics, and hydrogeological issues, and performed other miscellaneous tasks. Within the area tested, chlorinated solvent mass was reduced 94 percent, with no reductive dechlorination “stall,” and biological activity has continued via endogenous decay for 14 months after the recirculation was discontinued.

Mr. Bamer was heavily involved in implementation of enhanced anaerobic bioremediation slug injections at another portion of the site. Similar previous efforts at this site by another consultant had mixed effectiveness while resulting in surface leakage into a new building built by the new site owners. He wrote an implementation work plan that was used to perform injection of a sodium lactate electron donor solution and bioaugmentation without surface leakage. His responsibilities also included intermittent field oversight of the injection and bioaugmentation work performed by the implementation subcontractor, tabulating injection performance data, and providing updates to management.

Mr. Bamer served as the process design engineer of a full-scale groundwater extraction and treatment system for the site to isolate it from regional regulatory issues and managed the refinement of the existing groundwater model to simulate different pumping scenarios for design consideration. The design was completed, permitted, and Mr. Bamer served as the lead engineer reviewing project submittals and contractor requests for information (RFIs), providing technical support, and preparing O&M and startup documents for the client. The system was successfully started, and Mr. Bamer served as the lead engineer on a team advising the client on engineering and technical support of the ongoing operation and maintenance of the system, strategic issues with regards to regional regulatory issues, and hydrogeological modeling and performance evaluations. As part of that oversight, Mr.

Bamer developed a new and more efficient electronic tool for capturing and presenting O&M information to the client, such that the client requested CDM Smith present this improved tool to all their other O&M project managers in the region. Mr. Bamer served as the lead engineer the design of an additional extraction well to capture additional VOC mass that was under a building and had not been identified in previous site characterizations.

Senior Engineer, USACE Kansas City District, Matlack Inc. Superfund Site, Woolwich Township, New Jersey. Mr. Bamer leveraged his ISTR experience to advance the southern portion of the site all the way through remedial design, which was successfully submitted on time to secure Bipartisan Infrastructure Law funding. Mr. Bamer provided senior technical review of all design deliverables, led development of the ISTR performance criteria, and led discussions with USACE and EPA regarding design reviews, development of a pre-RA sampling approach to address uncertainty in thermal treatment zone extent, and optimization of the RD to give EPA maximum flexibility during implementation while keeping the project detailed and biddable.

Thermal Remediation Task Manager, Remedial Design and Implementation, Tacoma, Washington. Mr. Bamer served as the thermal remediation task lead on the Well 12A NPL site in Tacoma, Washington under contract to the USACE and in consultation with the EPA.

Following investigation and design, previous consultants installed a groundwater extraction and treatment system, but that remedy has not been sufficient to meet remedial objectives. CDM Smith is implementing a multi-component remedy, with the first Record of Decision ever to be based on reducing the mass discharge from the site. The site strategy includes excavation of one portion of the site, thermal remediation in the source area, and bioremediation downgradient of the thermal treatment zone. In conjunction with the project manager team, Mr. Bamer oversaw and provided technical input into the review of the electrical-resistive heating (ERH) thermal design, oversight of the installation and operation of the ISTR remedy, post-treatment confirmation sampling, and documentation of the results in a final report.

Project Engineer, Remedial Design and Thermal Remediation Implementation, Southeast Rockford Groundwater Contamination Superfund Site, Illinois. Under contract to Illinois EPA, CDM Smith is performing investigation and RD activities at multiple sources within the 10-square-mile Southeast Rockford Groundwater Contamination Superfund Site. The site contains numerous sources that have contributed to volatile organic contamination of soil and groundwater. For one source area, Mr.