Welcome to CornerPost

Welcome to Cornerstone's blog, which is devoted to providing useful information to our clients and industry professionals.

Our talented staff of bloggers will offer brief, thoughtful pieces on the topics facing our industry today.

CornerPost will feature tips and tools, lessons learned, observations about major conferences, and much more.

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15 March 2017

Landfill mining – what are the impacts on groundwater quality?

There’s gold in them thar landfills! Well, you might think so, given the increase in mining of municipal solid waste (MSW) from landfills in recent years. From less than ten landfill mining operations in the early 1990s we now have upwards of 100 MSW mining operations in progress in the U.S. MSW is mined for…

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Categories: Environmental Planning & Compliance, Environmental Remediation, Landfill Engineering and Design, Solid Waste
Posted By Bill Soukup at 11:30 AM  |  No Comments on Landfill mining – what are the impacts on groundwater quality?

1 March 2017

Biogas energy recovery at a California wastewater treatment plant – Lessons learned

I recently worked on a very interesting project in California to design a biogas energy recovery system for a wastewater treatment plant (WWTP). The system recovers nearly 100 percent of the methane produced from anaerobic digestion of wastewater sludge and conditions it for heat and power generation and transportation fuel. The design integrates a BioCNG™…

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Categories: Air Quality, Alternative Energy, Biogas and Landfill Gas, Environmental Planning & Compliance
Posted By Jessica Bernardini, PE at 11:30 AM  |  No Comments on Biogas energy recovery at a California wastewater treatment plant – Lessons learned

15 February 2017

Designing a stormwater conveyance system for steep slopes – balance performance and cost

When I look at solutions for stormwater conveyance systems at sites with steep slopes, I always want to come up with a solution that balances performance and cost and is not burdensome to the client in terms of risk and long term maintenance. I want to give them something that will hold up, will not…

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Categories: Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Brian Stone, PE at 11:30 AM  |  1 Comment on Designing a stormwater conveyance system for steep slopes – balance performance and cost

1 February 2017

Ghosts of permits past – What may be lurking in old permits and how it may hurt your facility

If you are like most environmental personnel, you have all of your air permits in your site files in case an inspector ever asks about one. You probably think that everything is covered and you are in compliance since you have all those permits. I worked on a project for a site that had great…

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Categories: Air Quality, Environmental Planning & Compliance, Solid Waste
Posted By Julie Hall at 11:30 AM  |  No Comments on Ghosts of permits past – What may be lurking in old permits and how it may hurt your facility

13 January 2017

Landfill settlement – Account for it now to gain airspace later

Settlement tends to be a bad word when it comes to landfills. We think of the damage it can cause to landfill infrastructure and the difficulty faced by operators to maintain final waste grades. Worst of all, unplanned waste settlement can create unused airspace that is challenging and expensive to recapture. However, by accounting for…

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Categories: Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Laura Hammerer at 6:10 PM  |  No Comments on Landfill settlement – Account for it now to gain airspace later

4 January 2017

A forward thinking approach to air permitting at a landfill – six steps that will help you plan ahead

When it comes to air permitting and compliance, carefully planning ahead can make a big difference. We want to share forward-thinking approach to air permitting at landfills, which my colleague Geed Latif and I have developed based on work we did at a site in the Midwest. The site was new to us, so to…

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Categories: Air Quality, Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Julie Hall at 12:02 PM  |  No Comments on A forward thinking approach to air permitting at a landfill – six steps that will help you plan ahead

14 December 2016

Lessons learned about construction quality assurance practices

Construction documentation is a critical piece of the success of a project, and if done poorly or inaccurately, can lead to problems down the road. With the construction season wrapping up, I wanted to pass along a few construction quality assurance (CQA) practices that will help you avoid headaches at the end of a project….

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Categories: Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Jessica Bernardini, PE at 1:06 PM  |  No Comments on Lessons learned about construction quality assurance practices

30 November 2016

New NSPS Subpart XXX – Initial thoughts on how to comply and report

The air compliance team I work with has been working very closely with leaders across the solid waste industry to discuss a consistent approach as we all begin implementing the NSPS Subpart XXX rules. Initial reporting was due on November 28, 2016 for the Initial Design Capacity Report and the NMOC Emission Rate Report and…

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Categories: Air Quality, Biogas and Landfill Gas, Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Deanna Picklesimer at 11:30 AM  |  No Comments on New NSPS Subpart XXX – Initial thoughts on how to comply and report

10 November 2016

Small changes matter when it comes to improving landfill gas quality

How many alarm bells go off in your head when monitoring data indicates a significant drop in landfill gas quality, especially if you are supposed to use the gas in a beneficial reuse facility? And what can you do about it? I have an interesting story about a Wisconsin landfill that illustrates that small changes…

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Categories: Air Quality, Biogas and Landfill Gas, Environmental Planning & Compliance, Landfill Engineering and Design, Operations and Maintenance, Solid Waste
Posted By Cyndi Neitzel, PE at 11:30 AM  |  No Comments on Small changes matter when it comes to improving landfill gas quality

31 October 2016

Spray applied membranes – tips for effective use in landfill/brownfields redevelopment

Spray-applied membranes are typically the gas membrane barrier of choice to prevent vapor intrusion into buildings during landfill/brownfields redevelopment because they are so easy to apply around penetrations. But I have learned from experience (the school of hard knocks) that there are some real world pitfalls of using spray-applied membranes and achieving an effective methane…

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Categories: Air Quality, Biogas and Landfill Gas, Environmental Planning & Compliance, Landfill Engineering and Design, Solid Waste
Posted By Joseph Nemesh, PE at 12:46 PM  |  No Comments on Spray applied membranes – tips for effective use in landfill/brownfields redevelopment