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John Hollar

John Hollar, PE

2026-09-22T07:39:23-06:00May 8th, 2017|Tags: , , |

John Hollar is a Senior Principal Civil and Environmental Engineer based in Georgia with more than 25 years of experience advising a variety of industrial, power, and government clients in the development of a broad spectrum of environmental, health and safety, and sustainability (EHSS) programs.

Overview of Waste Management Planning, Engineering & Design

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Geosyntec is a recognized leader in waste containment facility permitting and design. From concept to implementation, we assist our clients in achieving efficient, safe, and secure containment of their regulated wastes that require land disposal. Our practitioners assist our clients in increasing commercial viability, achieving and maintaining compliance, and ensuring that short- and long-term needs are met for new and existing sites and projects. We are experienced in the permitting, design, and construction of expansions and closures of: Municipal solid waste (MSW) landfills Hazardous waste landfills Coal combustion residual landfills Construction and demolition waste landfills Radiological and mixed waste landfills Tailings impoundments Mine waste rock piles and dumps Our waste containment practice specializes in addressing the most complex and challenging projects through our innovative technologies and designs. Our practitioners assist clients with permitting greenfield sites and existing site expansions, maximizing disposal capacity, and solving complex site challenges.   Our practitioners also provide investigation, design, permitting, and construction oversight for on-site disposal facilities for cost-effective, safe on-site disposal of soils, sludges, and miscellaneous debris with a broad range of contaminants, including mercury, PCBs, and volatile and semi-volatile organic compounds.

Overview of Air Quality Management and Air Pollution Control

2026-09-11T10:09:08-06:00November 12th, 2014|Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |

Government regulations for air quality and emissions continue to rapidly evolve. Companies must understand, plan for, and adhere to rapidly changing requirements including monitoring, testing, emissions control, recordkeeping, and reporting. Attaining and maintaining compliance while minimizing operational and financial impacts can be a challenge, particularly in today’s regulatory climate. Geosyntec's comprehensive understanding of air quality laws and regulations, along with our expertise in state-of-the-practice emissions control and monitoring technologies, equip us to provide our clients with innovative and cost-effective solutions for their air quality compliance challenges. Our practitioners offer clients a broad array of services, including permitting, compliance reporting, and air pollution control technology selection and optimization. Our projects routinely involve minor and major source air permitting, compliance assistance, and regulatory negotiations, as well as air pollution control equipment troubleshooting, optimization, and testing. Air Permitting On behalf of clients, we create unique solutions that often help them avoid major source permitting requirements, like Prevention of Significant Deterioration (PSD) or nonattainment area New Source Review (NSR). Relying on our extensive knowledge of operating permit programs and our experience in a broad range of industries and emissions sources, we offer clients permitting assistance that aligns with federal, state, and local air jurisdictions. We craft strategic approaches to air quality challenges. When major source permitting cannot be avoided, our air dispersion modelers and control technology experts know how to respond to challenges associated with major source permitting requirements. Geosyntec’s experts address control technology evaluations, including Best Available Control Technology (BACT) and Lowest Achievable Emission Rate (LAER) evaluations. They are also adept at understanding and conducting ambient air impact analyses, like National Ambient Air Quality Standards (NAAQS), Prevention of Significant Deterioration (PSD) increments, and state toxic air pollutant (TAP) demonstrations. Air Compliance and Reporting With federal, state, and local air quality regulations constantly in flux, maintaining compliance can be a burden on businesses. Our nuanced understanding of policies, regulations, and drivers empowers us to craft effective and efficient compliance solutions for our clients to help them address challenges and remain in compliance. Together, we develop frameworks for comprehensive environmental management strategies that help clients meet air compliance and reporting requirements. Some of the compliance programs we helped design include those governing emission inventory reporting; Title V annual and semiannual reporting; greenhouse gas (GHG) reporting; and deviation reporting. Evaluation and Optimization of Air Quality Control Devices Our practitioners evaluate air pollution control devices and advise clients to help them meet emission standards and minimize operational costs. Our project experience includes combustion management and tuning for boilers, thermal oxidizers, and other combustion devices. We also specialize in area and source measurement of complex pollutants such as mercury, sulfur trioxide (SO3) and per- and polyfluoroalkyl substances (PFAS), Geosyntec has installed state-of-the-practice hardware and software using cross-duct lasers to continuously monitor ammonia (NH3) and SO3. In addition, we can assist clients with selection of continuous emission monitoring systems (CEMS) and offer operational assistance, data management, and equipment maintenance. Continuous Emission Monitoring System Design and Ambient Air Monitoring Geosyntec has supported clients with development of comprehensive environmental management strategies, optimization of plant operations, and increasing efficiency of their air emissions control systems. This has included installation, evaluation, and enhancement of CEMS at point sources and ambient air monitoring systems for fence line or offsite monitoring. Air Litigation Support Leading law firms throughout the United States seek technical support from Geosyntec due to our expertise and credibility providing litigation support. Geosyntec provides resources for attorneys to advocate for their clients’ interests on a myriad of air subjects related to business transactions, environmental management, compliance and enforcement, toxic tort, and general litigation topics. Geosyntec’s team of senior air professionals frequently provide expert witness testimony opinion reports, claims assessments, and agency negotiations and settlement support. Advancing the State of the Practice Experts in process and air pollution control technology design, we help clients develop strategic approaches to complex, multipollutant emission issues and provide clients with a balanced approach to plant operations. In the electric power industry, Geosyntec practitioners design strategies that reduce the amount of coal required to produce energy through improvements in fuel use, waste generation systems, and air pollution controls. Optimal air pollution controls, such as selective catalytic reduction (SCR, or thermal oxidizers), can result in substantial fuel savings and decrease emissions through improved performance of control devices. Geosyntec practitioners frequently collaborate with colleagues and industry peers at the USEPA, the US Department of Energy (DOE), the Electric Power Research Institute (EPRI), the Air and Waste Management Association (AWMA), and other organizations on new strategies for reducing air quality impacts. These collaborate strategies involve NOx control, mercury capture, scrubber optimization for heavy metals, catalyst selection and optimization, and plume opacity mitigation. In addition, our experts have developed methods to measure emissions of specific pollutants under complex operating conditions which have been accepted by air agencies across the country. Representative Services Air Permitting for New Facilities and Facility Expansions Air Pollution Control Engineering Ambient Air Monitoring and Source Testing Program Support Air Dispersion Modeling, Accidental Release, and Computational Fluid Dynamics (CFD) Modeling Carbon Management and Greenhouse Gas Inventories Compliance Reporting and Auditing Services Capital Project Permitting Assessments Emission Inventories and Mobile Source Studies Feedstock Testing Analyses to maximize Air Pollution Source Control Health Risk Assessments Indoor Air Quality Monitoring and Management Litigation Support and Expert Witness Testimony Odor and Noise Modeling, Monitoring, and Control Operator and Employee Training Process Engineering and Controls Optimization Regulatory Strategy and Compliance Management Strategic Technical Support to Trade Associations

Overview of Contaminated Site Assessment and Cleanup

2026-08-18T14:34:36-06:00November 12th, 2014|Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |

Geosyntec practitioners rank among the world's top professionals in providing site assessment and remediation services at a wide range of impacted sites using innovative technologies and solutions that consistently advance the state of the practice. Through our use of innovative technologies and solutions, we provide our public and private sector clients with a wide array of services to address their toughest challenges. Our contaminated site practitioners guide our clients through a specialized remediation plan, consult on regulatory strategies, and develop a comprehensive cleanup approach. We can address numerous types of media, including contaminated soils, sediments, and groundwater. Advancing the State of the Practice Geosyntec's practitioners are pioneers in site assessment and remediation. Our senior practitioners have developed and authored guidance material and courses for local, state, and national agencies and associations on remediation techniques and technologies. Working with the Interstate Technical Regulatory Council, Geosyntec practitioners taught a training course on vapor intrusion, including mitigation options for the development of vapor-impacted brownfield sites. Geosyntec practitioners also wrote the guidance document on evaluating, optimizing, or ending post-closure care at impacted sites, including brownfield sites, and developed a patented approach for sub-slab vapor migration mitigation allowing residential, commercial, and industrial development on sites impacted by vapor intrusion. Our specialists routinely collaborate with prominent national researchers from academia and government agencies to provide innovative and defensible strategies for sites with contaminated sediments. For example, we collaborated with the United States Geological Survey (USGS) to remediate chlorinated solvent-contaminated marsh sediments by applying a bioreactive mat system embedded with a dehalogenating microbial consortium, a technology Geosyntec helped develop. This project and partnership earned our client recognition as a finalist for the Service to America Medal awarded by the Partnership for Public Service. Through a collaborative research project with the University of Florida, Geosyntec professionals helped develop the FLUCL software package for the Florida Department of Environmental Protection. This software is used to calculate exposure point concentration statistics in risk assessment and was the first of its kind to contain algorithms for censored datasets. FLUCL has received endorsements from several United States Environmental Protection Agency regions and the California Environmental Protection Agency. Geosyntec scientists also pioneered the use of genetic molecular tools to characterize microbes in environmental media and are engaged in applied research and development with top academic institutions around the world, including the University of Toronto, Cornell University, and the Georgia Institute of Technology.

Environmental Permitting and Compliance

2026-06-30T11:45:30-06:00March 27th, 2014|Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |

Geosyntec provides a diverse portfolio of services to our public and private clients to improve their environmental and financial performance, manage risk, and reduce environmental liabilities consistent with their financial and stewardship goals. Our professionals have significant corporate, consulting, and government work experience and specialize in each of these sectors. Accordingly, we understand our clients' challenges and needs and provide appropriate solutions that consistently reduce risk exposure and add value to the bottom-line. Geosyntec delivers solutions in many areas of environmental compliance support, auditing, management systems, environmental studies and cleanup, infrastructure engineering and design, and natural resources assessment and restoration. We have completed nearly 10,000 projects worldwide with an outstanding and always improving safety record. Our experience delivers on the potential of innovative applications of proven and emerging technologies. Dynamic environmental laws, regulations, standards, and guidance demand a proactive approach in order for businesses to minimize environmental risk while maintaining economic benefit. Geosyntec's Environmental Management practitioners help our clients manage existing and potential liability associated with environmental, health and safety issues. Our clients have included utilities, government agencies, and companies in agriculture, manufacturing (chemical, food products, and technology), transportation, waste management, retail, and property development/management. Geosyntec assists clients with a variety of environmental compliance services. These services range from proactive to defensive/corrective, including the following: NPDES permitting support Air permitting support Toxics Release Inventory (TRI) reporting RCRA program development and implementation Environmental auditing program development and implementation Environmental performance measurement

Landfill Gas Collection and Management Systems

2026-04-21T07:51:36-06:00March 27th, 2014|Tags: , , , , , , , , , , , , , , , , , |

A significant component of Geosyntec's landfill engineering practice is the management of landfill gas and compliance with air quality standards. Our expertise with landfill gas is built upon a legacy of being a recognized leader helping our clients achieve safe, secure containment of regulated wastes since our founding in 1983. Geosyntec has extensive experience in preparing landfill gas collection and control system (GCCS) design master plans for compliance with New Source Performance Standards (NSPS) for several facilities.  We work with facility owners and operators to optimize the construction of landfill GCCS through phased development as cells are constructed and closed. Through proper sequencing, evaluation of future system needs and capacity, and sufficient initial system construction, we take advantage of the installed infrastructure and keep landfill gas flowing as a fuel source. Phased landfill gas management plans benefit our clients by optimizing the value of the capital investment in the gas collection system, minimizing the need to abandon parts of the system as subsequent lifts of waste are placed, and providing reliable gas flows that can generate a steady revenue stream from direct use, power generation, or conversion. We are also assisting our clients in the development of landfill gas-to-energy (GTE) projects, either through self-development or contracts through third parties. Once installed, Geosyntec has the hands-on, practical experience to assist our clients with the operation and maintenance of their GCCS.  Whether it is routine monitoring, tuning and optimization, repairs, or expansions to these systems, Geosyntec can provide the personnel and services to keep a GCCS operating in optimum conditions.  Our field services personnel are familiar with the current practices of landfill operations and have the capabilities to service flares, blowers, compressors, and self-perform repairs on the in-field components such as HDPE piping, valves, wellheads, sumps, and pumps.  Geosyntec is a trusted consultant for compliance issues having successfully obtained permits for landfill gas flares and GTE facilities, including in severe non-attainment areas.  Our professionals develop strategies that allow our clients to manage their air emission portfolios and plan future projects to be compliant with air regulations. We have excellent technical relationships with state and federal regulators throughout the country and are recognized in the industry for our technical leadership. Geosyntec is a dynamic and influential member of the international community of solid waste industry practitioners focused on furthering the science and technology of sound landfill gas management. We are a long-standing member of the International Solid Waste Association (ISWA) with the objective to work in the public interest to promote and develop sustainable and professional waste management practices worldwide. Within the United States, Geosyntec is heavily involved at local and national levels with the Solid Waste Association of North America (SWANA), providing speakers to conferences and serving on national committees for the Landfill Management and Landfill Gas Technical Divisions. As a partner with the U.S. Environmental Protection Agency's (USEPA) Landfill Methane Outreach Program (LMOP), a voluntary assistance and partnership program, Geosyntec works to promote the use of landfill gas as a renewable, green energy source.

Management Systems Services

2026-09-21T08:04:51-06:00March 27th, 2014|Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |

Whether it's due to customer, shareholder, or regulator-requirements, transitional workforce challenges, or some other reason, organizations are seeking to develop, implement, maintain, and improve upon their systems for environmental, safety and health, and sustainability management. Limited resources and management system expertise within the organizations can be a road block. Geosyntec's comprehensive understanding of our clients' operations paired with our expertise in management system development and implementation allow us to provide our clients with innovative and cost-effective solutions for identifying, prioritizing, and managing more efficiently the environmental, safety and health, and sustainability risks and opportunities associated with their operations. Our management system experts offer clients a broad array of services, including policy development support, system element gap analysis, document and training material development, performance monitoring data analysis, trending, and visualization, information management system design and optimization, system auditing, nonconformance correction planning including root cause analysis, and management review and third-party certification preparation. Our projects routinely involve organizations with multiple and varied facilities, multi-cultural stakeholders, and transient workforces. Through our work, Geosyntec's clients improve performance and achieve their operational goals. Geosyntec's management system implementation programs are tailored to meet the needs of each client resulting in a smooth integration and minimized operational disruption. Geosyntec's strategy for new management systems is to learn about existing processes and procedures and develop a simple manual that cross-references to other processes and programs within the organization. We then work with the organization to customize the system and procedures. A management system developed in partnership with Geosyntec is a good fit from the start and is flexible to evolve with the organization. For our clients with existing management systems, Geosyntec offers support with routine auditing and maintenance, system improvement, gap analysis with updated standards, developing and implementing corrective actions, and transitioning to new and/or revised standards. Our management system specialists include individuals with technical expertise across a broad range of disciplines who have studied and are training in management systems and who have worked in industry under management systems. We have experience with systems that conform to the ISO, OHSAS, RC, and EPA compliance-focused management system standards. The ISO 14001 standard for Environmental Management and the ISO 45001 standard for Occupational Safety and Health are widely used in manufacturing. Geosyntec is experienced in performing gap analyses of existing systems to determine what steps are needed to comply with these standards. We also perform internal audits, develop site-specific lists of legal requirements, develop standard operating procedures, and assist with corrective and preventative actions to improve management systems.

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