AW&MA’s most popular specialty conferences, the Air Quality Measurement Methods and Technology Conference, is April 23-25, 2025. This conference provides extensive coverage of all aspects of air measurement methodologies, including associated quality assurance protocols and how to use and interpret data. Sessions will also focus on the assessment of key substances of concern for humans and the environment, including criteria pollutants, greenhouse gases, and air toxics.
Jose Landeros and Sergio Valenzuela will be presenting “Empowering Imperial County AB617 North End Communities With Low-Cost Monitoring Sensors.”
The Imperial County Air Pollution Control District (ICAPCD) has become a model for Assembly Bill 617, demonstrating how collaborative efforts in environmental justice can address complex air quality challenges, including pollution from agricultural, industrial, and cross-border sources. This conference is a unique opportunity to engage with local experts and explore solutions across scientific, legal, regulatory, policy, and communication domains, empowering professionals to address pressing environmental justice issues.
Eva Luu and Armando Hurtado will be presenting “Real-Time Monitoring of Odor Using Sulfur as a Surrogate,” during the Agricultural Emissions and Odor Measurements track.
Cannabis remains a contentious topic in the United States. While a majority of Americans support legalization, challenges such as nuisance odors have emerged, complicating the landscape. Geographical location plays a significant role in the success of cannabis cultivation, particularly in outdoor and greenhouse settings, where moderate temperatures benefit crop production. These same favorable weather conditions often align with increased population density, heightening the need for effective odor mitigation strategies. Although the distinctive “skunky” odor has traditionally been linked to terpenes, recent research suggests that other compounds play a critical role.
To address cannabis odors, various mitigation methods have been implemented, including misting systems, carbon filters, and advanced scrubber units using ozone and photocatalytic oxidation (PCO).
Each of these methods can be effective for odor controls in the appropriate settings and when applied to specific cultivation methods.
While these techniques can reduce onsite odors, offsite locations frequently continue to detect the characteristic smell. Odor samples can be collected onsite and analyzed in Odor Labs, but they do not provide real-time data for cultivators to make immediate adjustments to operations.
Through meticulous planning and iterative rounds of testing, we identified total reduced sulfurs (TRS) as a reliable surrogate for real-time measurements of cannabis odors in enclosed spaces. This approach allows operators to identify odor problems in situ and take necessary action in a timely manner. The findings underscore the importance of innovative measurement techniques in improving odor management practices and enhancing the sustainability of cannabis cultivation. This work aims to contribute to a more comprehensive understanding of odor dynamics in cannabis production, ultimately assisting cultivators in effectively addressing community concerns while optimizing operational integrity.
Learn more at SCS Engineers.
Remote monitoring and control (RMC) is revolutionizing how the solid waste industry collects, processes, and visualizes critical data. With a fleet of FAA-licensed drone pilots nationwide, RMC is at the forefront of developing drone services that enhance operational safety, improve efficiency, and optimize data management processes. By leveraging cutting-edge drone technologies and GIS-based data assessment tools, the waste management industry can streamline remote data collection and decision-making processes.
This presentation, Advancing Drone Technologies for the Solid Waste Industry explores how drone technologies are reshaping industry practices, offering solutions that reduce operational costs, minimize environmental impact, lower health and safety risks, and improve overall site efficiency. Attendees will gain insights into the latest advancements in drone applications and learn practical strategies for integrating these technologies into their operations.
Specifically, attendees can expect to learn:
Meet SCSers, Phil Carrillo, National RMC Director/VP and Melissa Russo, Business Manager – Drones & GIS.
Phil is a systems integrator with over 24 years of experience in the operations and maintenance (O&M) of landfill gas (LFG) extraction and treatment systems. Phil has managed the design and installation of over 180 RMC systems for 100 clients. In addition to serving clients with customized design, installation, and support of SCS RMC solutions, Phil is an FAA Part 107 drone pilot and leads the development of advanced drone technologies and custom software applications that enhance data management and operational efficiencies for the solid waste industry.
Melissa Russo leads SCS RMC’s drone services. She is instrumental in managing the administration and installation of approximately 150 RMC projects and as an FAA-licensed drone pilot, she leads the development of SCS’s drone services, identifying the latest applications to benefit clients in optimizing remote data collection, GIS integration, and data management. Melissa has managed and performed numerous aerial inspections nationwide and internationally for purposes such as thermal surveillance, methane leak detection, topographic mapping, stockpile calculations, aerial 2D imagery, and 3D mapping. She is responsible for integrating GIS with drone-collected data to enhance field data collection and analysis, enabling more precise and actionable insights for clients.
Explore the full list of sessions from SCSer’s at the SWANA Western Regional Symposium, we look forward to seeing you! Register today!
SCS Engineers welcomes Dave Dirkin, who joins the firm as a Senior Environmental Services Project Manager in the U.S. Southwest region. Mr. Dirkin is a Professional Geologist (PG) in California, Oregon, and Washington and brings over two decades of expertise to SCS.
“Dave is an outstanding addition to SCS Engineers. He strongly benefits our clients with his deep understanding of federal regulatory framework requirements and experience implementing modern remedial technologies that keep projects moving,” says SCS Vice President and Project Director Ashley Hutchens.
Mr. Dirkin has extensive federal regulatory experience and works closely with the Department of Toxic Substances Control (DTSC), California Regional Water Quality Control Boards (RWQCB), South Coast Air Quality Management Districts (AQMD), and local authorities, e.g., fire departments and environmental health agencies.
As a PG across the Pacific seaboard, with extensive experience in subsurface characterization of soil, soil vapor, and groundwater, he will support remediation for properties impacted by contaminants such as fuel hydrocarbons, chlorinated solvents, and heavy metals.
Dave is recognized for his excellent client relationships and communication skills, which are significant to SCS and its clients. At SCS, he will manage projects for commercial, industrial, and federal facilities such as petrochemical refineries, fuel distribution pipelines, terminals, service stations, retail and industrial dry cleaners, and military installations.
His expertise is valuable for municipalities, developers, and banks when due diligence, including complex Phase II investigations and remediation projects, is essential to recycle strategic properties. Well-versed in coordinating and permitting work, including air quality management for Title V permitting, he supports all related stakeholder communication activities, providing more comprehensive environmental services.
Additional Resources:
A Fieldwork Guide for Navigating Biohazards in the Southeastern US
South Florida, as is the US Southeastern region, is experiencing rapid development, and there is a high demand for land, especially in regions such as abandoned golf courses, old plant nurseries, cow pastures, and other neglected parcels of land. While these areas often appear overgrown and poorly maintained, they are ideal habitats for diverse flora and fauna. Having worked in the environmental field, I’ve had firsthand experience with the biological hazards in these areas.
Flora: The Dangers of Plants
South Florida has many plant varieties, some of which can be poisonous, hazardous, or even deadly. Toxic plants can cause harm to humans or animals through contact or ingestion. Poison Ivy, for example, is a common plant in South Florida that can cause skin irritation if contacted for an extended period. It grows in various forms, including as a vine, shrub, or ground cover. The best way to identify it is by its distinctive “leaves of three, let it be” pattern. Be cautious, as it can often be confused with the native Virginia creeper, which has five leaves.
Poisonwood, another dangerous plant, is commonly found in native hardwood hammocks. Its leaves, stems, and roots carry urushiol oil, a potent irritant that causes severe skin reactions. The oil is difficult to remove, and contact with any part of the tree can result in intense itching and irritation. It is critical to avoid leaning on or touching poisonwood trees.
Deadly plants such as Angel’s Trumpet, Coral Bean, Milkweed, and Lantana are often used in landscaping but are highly toxic if ingested. While it’s unlikely someone would consume plants from an undeveloped site, avoiding eating any fruits or vegetables found in field sites is wise, particularly if contamination levels are uncertain.
Hazardous plants like Saw Grass and Saw Palmetto are common in South Florida’s natural areas. Saw Grass is abundant in the Everglades and has razor-sharp serrated edges. To handle them safely, move parallel with its serrations to avoid running your hand against them. Saw Palmetto, with its sharp thorns, also poses a risk. In both instances, gloves are best to prevent injury when working around thorny plants.
Fauna: The Wildlife of South Florida
South Florida also has various mammals, reptiles, and arachnids; many can be dangerous. The Florida Panther, Black Bear, and Bobcat are among the region’s most notable mammals. I always take precautions when I have not encountered a panther or bear in the wild. If you encounter one of these animals, please ensure the animal has an escape route, avoid turning your back or running, and make yourself appear larger to avoid provoking it.
Reptiles, including the alligator and crocodile, are common in South Florida. While alligators are generally not a threat, it’s important to be alert and never feed or approach them unnecessarily. Encountering alligators is inevitable when working in South Florida, making situational awareness crucial. Early in my career, we worked near a canal and parked our truck just off the water’s edge. Suddenly, we heard a deep, whooshing sound- almost like a V8 engine. It turned out to be a protective mother alligator guarding her nest right next to our parking spot. Recognizing the risk, we carefully moved the truck and left the area to avoid disturbing her and her nest. This experience serves as an important reminder to always be mindful of your surroundings, especially near bodies of water.
Similarly, venomous snakes, such as the Water Moccasin and Eastern Diamondback Rattlesnake, pose significant risks. Wearing protective gear like snake chaps and being mindful of your surroundings can reduce the chances of a snake bite. If bitten, seek medical attention immediately, and do not attempt to suck out venom or apply ice.
In the region, we find spiders such as the Black Widow and Brown Recluse. If bitten, it’s important to wash the area thoroughly with soap and water, apply a cold compress, and seek medical attention immediately.
Staying Safe in the Field
The flora and fauna of South Florida create a unique and vibrant ecosystem, but they also pose distinct risks to those working in the field. Knowledge of these biological hazards and proper precautions can ensure safety while navigating these wild areas. Remember to respect the plants and animals you encounter and use the proper protective equipment. By applying these lessons, you can safely engage with one of the most diverse and beautiful natural habitats in the United States.
About the Author: As a Project Professional, Rafael Aberle coordinates and performs site assessment activities, including soil and groundwater sampling. Rafael works across SCS’s southeast regional offices and clients. Rafael’s expertise is in environmental assessments and environmental study projects for municipal and private clients. He also has extensive experience overseeing construction projects, including methane gas management systems. You can reach Rafael at SCS Engineers.
Additional Resources: Health & Safety Training
Congratulations to SCS’s Carbon Capture and Sequestration clients for winning two international awards. The Climate Change Business Journal (CCBJ) is a publication of Environmental Business International (EBI). EBI is a leading independent source of environmental market research and business intelligence. SCS’s work for two clients, Pelican Renewables and Graphyte Carbon Removal, is recognized by CCBJ for its climate change industry achievements. Both awards will be presented during the EBJ Awards banquet at Environmental Industry Summit XXIII on April 3, 2025.
CCBJ PROJECT MERIT AWARD: COMMUNITY CLIMATE MITIGATION
Pelican Renewables & SCS Engineers
Pelican Renewables, LLC is a Stockton, California-based company with a vested interest in improving the life of all Sacramento-San Joaquin Delta residents and preserving the unique ecosystem of the Delta. Formed by residents, landowners, farmers, and businessmen, Pelican aims to serve both climate mitigation and the local environment and communities. Pelican collaborates closely with local community organizations and members to pioneer a community-focused project design and operation. Pelican is developing a carbon sequestration hub on the island of Rindge Tract, approximately 7 miles from Stockton. Rindge Tract lies on the deep-water shipping channel connecting the Port of Stockton to the ocean, enabling maritime transport for captured CO2. Pelican owns an ethanol production plant at the port where CO2 is captured and accessible by rail. The U.S. Department of Energy selected Pelican for a $45 million federal award under the CarbonSAFE program. SCS Engineers provides engineering and scientific analyses, geologic site characterization, and modeling to support Pelican’s EPA Class VI permit application that the grant targets.
CCBJ TECHNOLOGY MERIT AWARD: CARBON REMOVAL
Graphyte Carbon Removal & SCS Engineers
Graphyte Carbon Removal, a carbon removal and sequestration firm backed by Bill Gates’s Breakthrough Energy Ventures, began operations at its Arkansas-based plant in February 2024. Graphyte’s carbon sequestration solution’s price is considerably lower and can work faster than other sequestration solutions. The carbon block solution is also scalable and can potentially remove billions of tons of carbon. By-products of the timber and agriculture industries, otherwise burned or left to decompose, are collected. These by-products are considered biomass, dried to stop decomposition, and then condensed into dense blocks. The blocks are wrapped with an impermeable polymer sheet, making them environmentally safe and ensuring that decomposition does not restart. The blocks are stored in state-of-the-art sites with sensors and tracers, enabling robust long-term monitoring. Storage sites can serve multiple purposes, such as solar farms or agricultural land, and are designed to last up to 1,000 years. As experts in designing and implementing safe, long-lasting solutions that reduce, reuse, or store waste, SCS Engineers partners with Graphyte by providing environmental engineering design services with Tracer and RMC technology for its storage facilities.
Each year EBI, Inc. and its award selection committee present Business Achievement Awards in a number of categories to worthy recipients in the environmental and climate change industries. EBI has two business achievement award programs: one for Environmental Business Journal® (EBJ) and one for Climate Change Business Journal® (CCBJ).
The EBJ Technology Merit Award goes to Melissa Russo and the team leading the SCS RMC Drones with GIS program. This RMC program provides landfills and solid waste operations across North America with the technologies to optimize operations and address major challenges. As presented at the U.S. EPA’s recent Landfill Technology Workshop, SCS RMC combines sensors with SCS drone-based technologies and GIS to monitor landfill gas (LFG) emissions and detect leaks, eliminating a significant portion of the manual effort from quarterly compliance while performing operations more safely and accurately. Captured emissions data is useful for optimizing well fields, tackling odor issues, and quantifying emissions for renewable natural gas projects. The secure application enables supervisory control and data acquisition (SCADA), data management, and can automate regulatory reporting needs. Aerial surface emissions monitoring collects real-time, accurate data, which is critical for operations to keep a wellfield balanced. Data collected can also visualize below-surface conditions for individual wells or well clusters in trouble areas; zoom in to inspect an individual well’s liquid levels, pump locations, surface, subsurface, and perforated piping; and detect which wells need servicing and their impact on emissions. Thermal imagery and a 360-degree camera inspect the structural integrity of landfill flare systems, and a combination of aerial and terrestrial LiDAR imagery creates Building Information Modeling, detailing the physical and functional characteristics of buildings and other assets.
The EBJ Project merit Award goes to SCS Engineers & Grow America for the Casa Ramona remediation work. Grow America and Casa Ramona won a $4.9-million Site-Specific Cleanup Grant. SCS Engineers led the grant application and is the environmental consultant implementing funded restoration efforts. Casa Ramona has served the San Bernardino, California, community for several decades as a community-based non-profit organization. Debris from fire and demolition had left lead and asbestos-containing materials on its proposed site for community services, including childcare and senior housing. With funding under the ECRG grant, SCS performed the priority cleanup activities: removal, packaging, and disposal of lead and asbestos materials and removal of possible asbestos-impacted soil following the South Coast Air Quality Management District Procedure 5. The community can reuse the site for crucial low-income senior housing and a community center. Congratulations to Cristobal Ramirez and his team.
The awards will be presented at the 2025 Environmental Industry Summit in April.
SCS Engineers welcomes Russell Wharton, PE, to SCS Engineers as our new Project Director in Nashville, Tennessee. Russ will run the office that serves the state and brings to diverse SCS clients over three decades of expertise in civil engineering design, municipal, environmental, and geotechnical engineering, architecture, alternative energy (including renewable natural gas), and consulting.
With his years of experience in civil and environmental engineering, Russ’s expertise includes construction management and quality assurance, saving clients time and money. His ability to incorporate LEED elements and sustainability procedures with minimal cost impacts brings more value when applying design elements in the field. These strategies help avoid cost overruns and project delays.
While having experience working on national accounts spanning from the West to East coasts, Russ’s work experience includes counties and cities throughout Tennessee, serving as the client contact and managing regulatory needs, including federal and state agencies and Authority Having Jurisdiction requirements for entitlements (rezoning, special use, variances, design review approvals), and permitting, including such clients as New York City, the Port Authority of NY and NJ, and various international airports.
His broad development design experience – facility siting, grading/drainage, utility (water, sewer, stormwater), pavement, erosion, and sediment control is especially helpful for many businesses and facilities facing stricter regulatory policies necessary to comply with Clean Water regulatory actions.
As a professional engineer and general contractor licensed in Tennessee, Russ earned a Vanderbilt B.E. in civil and environmental engineering. He is also an active member of Rotary International.
Please join SCS Engineers in congratulating our Chief Strategy Officer (CSO), Nathan Hamm, for his new position. As CSO, Hamm will lead SCS efforts for strategic planning, identification of short-and long-term growth objectives, and new business and expansion opportunities.
Hamm will coordinate and facilitate the optimization of the marketing and business development efforts across SCS to support strategic efforts. Further, he will lead the Client Success Program, which seeks to provide the highest value to our clients. As a professional engineer, Nathan Hamm has nearly three decades of experience and an ideal blend of client-focused consulting, business acumen, and hands-on work with our strategic initiatives to draw from.
Further, his previous experience as a Client Manager, Project Manager/Director, and the leader of our Leachate and Industrial Wastewater Treatment strategic initiative provides him with a broad perspective, key relationships, and strategic insight across SCS and the industries we serve. Hamm will oversee the program strategies that keep SCS’s deep bench of professionals poised to provide sustainable, full-service solutions.
SCS Engineers CEO Doug Doerr says, “Nathan Hamm’s background as part of SCS’s executive team, his work with our talented professionals, and his legacy of success with clients are key as SCS continues evolving to serve our core and expanding industry base.”
Additional Information:
SCS Engineers is excited to announce two new National Market Leaders for the firm in 2025 backing SCS’s ongoing commitment to growth. One SCS is how the firm works proactively as one team to leverage talent across the company, applying systems and processes locally that deliver the highest quality and value to clients.
Mike Miller takes the reins from Mike McLaughlin to lead the Environmental Services (ES) practice. Mike Miller has been with SCS for nearly 20 years, serving in various roles across the company. He served as the Environmental Services Leader in the firm’s largest region and has also served SCS as one of the National Experts for Environmental Due Diligence. Mike is a Project Director and was appointed as a Senior Vice President in November of 2023. Mike Miller will oversee the strategic direction, growth, and performance of the company’s ES market. Undoubtedly, he will continue to be fueled by his passion for engaging SCSers across the company with his One SCS spirit to provide exceptional service for clients.
Dan Cooper now leads SCS’s Solid Waste practice, taking over from Bob Gardner. Dan joined SCS in 2005 and has been an integral part of the Southeast region, most recently serving as their Solid Waste Leader. Under Dan’s leadership, the Southeast solid waste practice has grown by over 70% since 2019, when he took on his current position. Dan is a professional engineer in several states and serves SCS as a Project Director and Vice President. Dan, newly elected to SWANA’s Board of Directors, is the Region 5 Director for Florida and the Caribbean. Similarly to Mike, Dan will focus his efforts on the strategy, growth, and performance of the solid waste market for SCS with a heavy focus on enhancing our One SCS approach to serving clients.
SCS’s employee-owners and clients are deeply grateful to Mike McLaughlin and Bob Gardner, who have been instrumental in guiding the firm to its current success. Their dedication and leadership have left an indelible mark on the organization, and we extend our heartfelt gratitude for their years of service.
Additional Information:
About SCS Engineers:
SCS Engineers’ consultants, scientists, engineers, and contractors provide expertise in designing and implementing solid and hazardous waste management, biogas, RNG, carbon capture – reduction, measurement, air quality, greenhouse gas verification solutions, and land recycling, each compliant with the most rigorous regulations and standards. Our award-winning teams work with industries, manufacturers, developers, and municipalities to prevent, mitigate, and remediate environmental challenges while applying our knowledge of environmental regulatory systems and technologies. SCS professionals work effectively to shorten project timelines, stay on budget, and close gaps between sustainability goals and achievements so our clients can produce and deliver products and services more efficiently.
On Tuesday, September 25, the U.S. Environmental Protection Agency (EPA) issued two enforcement alerts addressing regulatory requirements and associated compliance issues at municipal solid waste landfills (MSW landfills). The alerts address Clean Air Act requirements that control the release of landfill gases (LFG), particularly methane, from MSW landfills.
These reminders represent compliance issues that EPA has flagged during enforcement actions. EPA thought they were important enough to publish these alerts for the benefit of landfill OM&M; expect state and local agencies to focus on these during their regulatory inspections.
The alerts provide an overview of the Clean Air Act regulatory requirements related to landfill air emissions and aim to help landfill owners, operators, and contractors comply with the law and take the necessary steps to avoid potential EPA enforcement actions.
The first enforcement alert, “EPA Investigations Find Municipal Solid Waste Landfill Operators are Failing to Properly Conduct Compliant Monitoring and Maintenance of Gas Collection and Control System,” is intended to remind MSW landfill owners, operators, and their consultants to conduct routine monitoring and maintenance of gas collection systems to ensure all landfill emissions are being properly captured and controlled.
The second enforcement alert, “MSW Landfill Operators Fail to Include Wastes from Total Degradable Waste-in-Place and Properly Sample Landfill Gas, Resulting in Underreported Emissions,” is intended to remind MSW landfill operators, owners, and their consultants to identify and document nondegradable wastes excluded in calculations properly and to collect representative LFG samples for non-methane organic compounds analysis and emission calculations.
If you are operating a landfill that gets an EPA Section 114 request for data, is having or has had an EPA inspection, or has received an EPA NOV, you may want to contact the compliance experts at SCS Engineers to seek advice on EPA’s perspective on rule history, interpretation, and assist how best to prevent or defend against enforcement actions.
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