News & Events

To learn more about Cornerstone, review our list of regulatory updates, live webinars and press releases, as well as the schedule of conferences we will be attending.


March 16, 2017


It’s that time of year again! This time we’re packing our bags and heading to Reno, Nevada for 2017 SWANAPalooza!

March 27 – 30, 2017

We’re off to Reno, Nevada! It’s SWANAPalooza time and we’re excited to see you there. Make sure to stop by our booth (#323), we’ll be exhibiting with our parent company, Tetra Tech. We also have a great line up of presenters.


Tuesday, March 28th:

Practical Solutions to a Variety of Landfill Gas Problems

Bradford Albrink, Project Engineer, Cornerstone Environmental Group

Michael Contestabile, Project Manager, Cornerstone Environmental Group


Wednesday, March 30th:

Gas Conditioning — Practical Applications to Making Your Fuel Usable

Steven G. Wittman, Senior Client Manager, Cornerstone Environmental Group


Get the full conference agenda here



February 2, 2017

Credit: Cornerstone Environmental Group

Leading the charge in anaerobic digestion…

Cornerstone and its parent company Tetra Tech were recently mentioned in MSW Magazine as the leaders in the anaerobic digester project planning with an emphasis on RNG systems. Written by Daniel P. Duffy, “Waste In, Energy Out: The Costs and Benefits of Anaerobic Digesters”, the article focuses on the economic benefits of anaerobic digestion technology. In the article, Duffy focuses on two of Cornerstone’s RNG projects. Clean World Partners’ Sacramento South Area Transfer Station’s Organic Waste Recycling Center, in which Atlas Disposal trucks bring material to a food waste digester, then fill up their trucks with BioCNG vehicle fuel. As well as South San Francisco Scavenger Company’s (SSFSC’s) Blueline Transfer Station, which will use biogas from food and green waste to fuel SSFSC’s fleet of collection trucks.

Read more about the economic benefits of anaerobic digestion by following the link below.

Read the full article now



January 23, 2017



Cornerstone is exhibiting and sponsoring at the Wisconsin Integrated Resource Management Conference! You can find us in the exhibit hall located here. Also, don’t miss out on our presentations.

We’ll be presenting on:


Planning for Phased Capping, Tyler Field

Challenges of Exhuming a Superfund Landfill, Mark Torresani


Turning LFG into RNG and Selling it to Waste Haulers, Steve Wittmann

Planning to Prevent Leachate Spills, Mark Torresani


Get the full scoop on WIRMC 2017’s website!



January 18, 2017




Don’t miss Cornerstone’s landfill expert Rob Sochovka’s article published in Waste Dive! 

In his article, How industry changes will affect operational optimization of landfills, Sochovka discusses the inevitable that changes across the waste industry that will have major effects on the overall industry approach to optimizing landfill operations. Options for increasing landfill densities and compaction are huge game changers, as are government-mandated waste diversion and waste ban policies. Zero waste programs, commodity pricing, waste-to-energy and CNG fuel options, as well as other regulatory changes are expected to change how the industry does business in the next decade.


Read the full article on WasteDive





2017 Conference Schedule

Come visit us at one of this year's conferences!

US Composting Council, Compost 2016 Exhibition and Conference, Westin Bonaventure: Booth #223
January 23-26, 2017

NYWEA 89th Annual Meeting, Marriott Marquis, NYC
Feb 6-8, 2017

WIRMC 2017,The Osthoff Resort, Elkhart Lake, Wisconsin: We're exhibiting and sponsoring! Booth #45
Mar 01-03, 2016

****Check back soon for more updates!****