Industry Insights


Our Annual Technical Seminar Returns to Orlando, Florida!

Highlights for the day include:

Presentations on alternative landfill covers, leachate treatment, renewable natural gas, emerging contaminants, emergency debris management, and more.


Our Technical Seminar brings together professionals working on the forefront of changing regulations and management techniques.


Seminar Details:

Date: Thursday, October 25, 2018
Time: 9:00 AM – 4:00 PM
Location: 310 Lakeside

201 East Pine Street

Orlando, FL 32801


Morning refreshments will be served beginning at 9:00 AM. Lunch will also be provided.


PDH credits: This technical program will qualify for 4.0 hours of continuing education credit for Professional Engineers through Cornerstone’s state-approved continuing education program. In addition, we offer Florida Landfill Operator credits and SWANA CEUs.

This is an invitation-only event sponsored by Cornerstone Environmental Group, LLC and Tetra Tech, Inc. exclusively for our valued clients. If you are interested in attending, please contact Kelly Chadwick at or 845-695-0239.

Seating is limited. Please respond by Wednesday, October 17, 2018 to secure your seat.




Tom Bilgri, P.E. – Landfill Component Design for Sub-Surface Reactions

Mr. Thomas Bilgri is the Manager of Biogas Engineering Services for Cornerstone, with 30 years of landfill gas (LFG) management system design and permitting experience. He has conducted assessments of LFG production for existing and proposed landfill facilities throughout the world and has provided on-site evaluations of subsurface LFG migration, surficial LFG mitigation and the evaluation and response to odors related to LFG systems. He has also been engaged on numerous beneficial-use projects, including direct sale, electrical generation, compressed natural gas (CNG), liquefied natural gas (LNG) and high-BTU gas production facilities. Mr. Bilgri’s duties include managing and interfacing with engineering, construction, and field services personnel, LFG control and monitoring program oversight, and developing training materials for LFG monitoring technicians and design engineers. As an active member of the Solid Waste Association of North America (SWANA), he has an in-depth knowledge of current industry trends and the status of federal and local regulatory issues and was inducted into the SWANA Hall of Flame in 2018.


Dave Knapp – Biogas to Renewable Natural Gas – Technical Hurdles and Current Market Drivers

Mr. David Knapp is responsible for growing and developing solid waste services in the southeastern United States and has over 30 years of industry experience. He provides landfill gas (LFG) and solid waste consulting services, serves as program manager and technical leader for various aspects of LFGE construction and environmental service markets. Services include design oversight and review, due diligence, environmental support, municipal and commercial major solid waste initiatives with public and private clients and staff management. Mr. Knapp’s project experience includes wastewater treatment, leachate evaporation systems, electric and gas utilization/generation facilities, landfill monitoring, LFG system maintenance, regulatory reporting, regulatory oversight, flare system maintenance, and general solid waste management. Mr. Knapp recently made a presentation for landfill gas to fuel at the South Carolina SWANA meeting.


Don Hullings, P.E. – Alternative Landfill Covers

Mr. Don Hullings has nearly 30 years of experience in solid waste consulting. His expertise is with geosynthetics including exposed geomembrane covers. Mr. Hullings has made dozens of presentations on topics including bioreactors, alternative landfill cover systems, and techniques for improving landfill capacity. His recent experience includes work on permitting the two most recent new Class III landfills in Florida.


Mark Swyka, P.E. – Clogged Leachate System Rehabilitation

Mr. Mark Swyka has over 35 years of experience in solid waste management, and the design, permitting, and construction of municipal waste, industrial waste, and hazardous waste landfills.  His experience includes design, construction, and certification of landfill baseliners, leachate management systems, landfill gas (LFG) management systems, and final cover systems.  He has contributed to the design of more than several dozen landfill facilities across the United States as project engineer, project manager, or certifying engineer.  Mr. Swyka is routinely called upon for expert project review and evaluation as well as preparation for testimony.  His broad base of solid waste experience includes supporting municipal agencies and private firms with operations, procurement, and compliance. Mr. Swyka specializes in the areas of geosynthetics and alternate construction materials with a broad range of experience with performance-based evaluation of equivalency of geosynthetic and alternative materials to traditional earthen materials.  He has been active in developing geosynthetic standards and geosynthetic application through past participation as a sponsor representative to the Geosynthetic Institute (GSI), and formerly as a member of the National Sanitation Foundation Joint Committee on Flexible Membrane Liners, Standard 54.  His experience also includes participating in several research projects associated with liner performance and seaming.


Kirstie Shurie – Emerging Contaminants in Leachate – A Sticky Situation

Ms. Kirstie Shurie is a chemical engineer with 2 years of experience in the environmental field.  Her experience includes solid waste engineering and remediation projects, with a focus on leachate management and treatment design.  Kirstie has used her background as a chemical engineer and applied her knowledge of compounds and treatment processes to the environmental field, specifically in the area of contaminants affecting both groundwater and leachate quality.  She received her Bachelor’s Degree in Chemical Engineering from Clarkson University.


Simon Carlyle – Emergency Debris Management

Mr. Simon Carlyle has been directly involved in all phases of disaster recovery efforts, and has developed significant knowledge of federal, state, and local regulations, allowing him to provide program and project management in response to some of the largest debris-generating disasters in the nation, including Hurricanes Irma, Harvey, Matthew, Isaac, Irene, Katrina, Rita, Wilma, Gustav, Ike, and Sandy as well as numerous ice storms, wildfires, flooding events, and other natural disasters.


Jennifer Deal, P.E. – Leachate Treatment Panel

Ms. Jennifer Deal has 20 years of experience as an engineer in the environmental field, including project management, regulatory compliance assistance, report preparation, proposal writing, supervisory activities, client management, regulatory agency interaction, technical design, and quality assurance reviews. Project experience includes design and permitting of solid waste management facilities, groundwater monitoring, regulatory compliance review, site development permitting, and technical investigations regarding landfills and illegal solid waste disposal.



Helpful Information:

For technical information, please contact Don Hullings at 845-695-0280.

Reserve your seat by October 17th. Contact Kelly Chadwick at or 845-695-0239.