National Environmental Consulting firm building lifetime relationships with our clients and employees

Using many of our core services, including air quality, biogas and recycling and processing facility engineering, we serve multiple markets from alternative energy to solid waste

Learn more

National environmental consulting firm Cornerstone banner

BioCNG Vehicle Fuel Project – Organic Waste Recycling Facility at the Sacramento South Area Transfer Station

Our patent-pending BioCNG system will use about 100 scfm of gas from a food waste digester, which will yield 450 gallons of gasoline equivalent each day. The fuel will be used in waste hauling trucks. Learn More


Our extensive solid waste experience helps clients transition to alternative organics management methods

Incorporating aerated static piles or anaerobic digesters, we can help you through the feasibility, permitting and design process to get the most out of these resources.

Learn more


Our Services

From concept to completion, Cornerstone provides a range of specialized services to meet the needs of our clients.
Air quality icon
Air Quality

Achieving compliance cost-effectively, while supporting business operations

Learn more →

Biogas and landfill gas icon
Biogas & Landfill Gas

Experts in collection, control, and beneficial re-use

Learn more →

Environmental planning and compliance icon
Environmental Planning & Compliance

Skilled planning and compliance services over a wide range of industrial and commercial sectors

Learn more →

hydrogeology icon

Setting the stage for effective site investigation, remediation, expansion, or reuse

Learn more →

Landfill Engineering Icon
Landfill Engineering & Design

Time tested solutions and innovative techniques to enhance environmental performance while improving the bottom line

Learn more →

operations and maintenance icon
Operations & Maintenance

Focusing on efficient, safe, and compliant operations

Learn more →

Organics Management

Incorporating alternative organics management to generate renewable products

Learn more →

Environmental remediation icon

Practical experience helps clients define exit strategies

Learn more →

Site and civil design project icon
Site and Civil Design

Solutions that are integrated with overall facility design and maximize our clients’ assets

Learn more →

Transfer and recycling process project icon
Transfer, Recycling, & Processing Facilities

Maximizing operational and asset efficiency, profitability, safety, and durability

Learn more →

National Presence

Serving large and small clients across the U.S. from a network of regional offices, we offer perspective and knowledge of local business and regulatory issues, and incorporate successful regional, national, and international solutions.

Learn more →


Cornerstone's Blog - CornerPost, Turns 3!

Cornerstone Environmental Group is proud to announce that our blog – CornerPost – just turned three years old. Our talented staff of industry experts have made more than 75 posts, filled with objective, brief, thoughtful pieces on the topics facing our industry today.

Take a Peek at Past Posts!