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Archive for the ‘Environmental Remediation’ Category

14 November 2018

Consider updating your groundwater monitoring program to reduce the occurrence of statistical false positive and negative rates

RCRA groundwater monitoring regulations have a few key goals: Accurately characterizing existing groundwater quality at the facility in question, assessing whether a hazardous constituent release has occurred and, if it has, determining whether measured levels meet the compliance standards. If you use accepted statistical testing methods in your groundwater monitoring program, you should be able…

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Categories: Environmental Planning & Compliance, Environmental Remediation, Landfill Engineering and Design, Solid Waste
Posted By Magdalena Mendola at 11:30 AM  |  No Comments on Consider updating your groundwater monitoring program to reduce the occurrence of statistical false positive and negative rates

1 May 2018

Hot landfills – prevention, detection and solutions

The issue of hot landfills has become a significant challenge to the waste industry over the last ten years. When a landfill’s temperature begins to elevate significantly, rapid response is necessary to minimize impacts to the public and costs to the owner. Each hot landfill is unique and I wanted to share the experience gained…

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Categories: Biogas and Landfill Gas, Environmental Remediation, Landfill Engineering and Design, Operations and Maintenance, Solid Waste
Posted By James Walker, PE at 11:30 AM  |  No Comments on Hot landfills – prevention, detection and solutions

19 April 2017

Coal combustion residuals – what should you consider before accepting them?

Unless you live under a rock, you know about the new CCR Rule, a RCRA Subtitle D Non-Hazardous Waste Rule that covers coal combustion residuals (CCRs). These include fly ash, bottom ash, boiler slag, and flue gas desulfurization (FGD) waste. I thought it would be interesting to share my thoughts on how the rules are…

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Categories: Air Quality, Alternative Energy, Biogas and Landfill Gas, Environmental Planning & Compliance, Environmental Remediation, Solid Waste
Posted By Don Grahlherr, PE at 11:30 AM  |  No Comments on Coal combustion residuals – what should you consider before accepting them?

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?

20 July 2016

Air sparging at former landfill site saves owner millions

For the past few years I’ve been involved in a groundwater remediation project at an operating New Jersey landfill. Instead of a costly remedy, we proposed an alternative air sparging system that we thought would be simpler, more effective, and far less costly. At this point I now have the data to show how well…

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Categories: Environmental Planning & Compliance, Environmental Remediation, Solid Waste
Posted By Gary DiPippo, PE at 11:30 AM  |  No Comments on Air sparging at former landfill site saves owner millions

16 September 2015

Pump selection – is it all easy-peasy or is there more to it?

Some people seem to think pump sizing and selection is a trivial exercise. Just figure out where the pump is located and where all the fluid needs to go and that’s all there is to it, right? Wrong! In reality, there are quite a few factors to consider before you attempt to specify a pump…

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Categories: Environmental Remediation, Landfill Engineering and Design, Solid Waste
Posted By Joseph Nemesh, PE at 11:30 AM  |  No Comments on Pump selection – is it all easy-peasy or is there more to it?

22 July 2015

Is non-thermal plasma treatment a viable solution for removing recalcitrant organic compounds from treated landfill leachate?

The distinct color of biologically treated leachate is the result of organic molecules that resist degradation. These organic compounds are usually referred to as recalcitrant or refractory compounds, and are predominantly composed of humic, fulvic, and hydrophilic acids. Residual concentrations of recalcitrant compounds are relatively high in biologically treated leachate effluent and have been shown…

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Categories: Environmental Planning & Compliance, Environmental Remediation, Landfill Engineering and Design, Solid Waste
Posted By Arie Kremen, PhD at 11:30 AM  |  No Comments on Is non-thermal plasma treatment a viable solution for removing recalcitrant organic compounds from treated landfill leachate?

5 February 2014

Is turbidity clouding your view of groundwater conditions?

Turbidity can be a real headache. Certain constituents, such as metals, have a real knack for attaching themselves to suspended solids. Higher concentrations of these particulates within a groundwater sample can create analytical results (for example, total metals) that misrepresent the actual groundwater conditions (where metals that may be present are dissolved). I’ve been giving…

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Categories: Environmental Planning & Compliance, Environmental Remediation
Posted By ceg-web at 11:30 AM  |  No Comments on Is turbidity clouding your view of groundwater conditions?

12 September 2013

Beware of the impact of NAPL and matrix diffusion on estimating groundwater cleanup times

For nearly all groundwater remedies, we are asked to determine, or at least estimate, the time it will take for groundwater to once again meet cleanup standards. Many one- and two-dimensional groundwater flow and transport models are useful for estimating cleanup times for dissolved-phase plumes. But it’s very important to keep in mind that these…

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Categories: Environmental Remediation
Posted By Bill Soukup at 10:22 AM  |  No Comments on Beware of the impact of NAPL and matrix diffusion on estimating groundwater cleanup times

24 April 2013

Tips for selecting methane gas detectors

Recently a colleague asked if anyone knew about permanent (fixed) methane detectors appropriate for installation on a commercial building that is built on a closed C&D landfill. I have had experience with a few different types, currently operating at a client’s site where a former ash landfill is being redeveloped into residential apartments. I thought…

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Categories: Air Quality, Biogas and Landfill Gas, Environmental Remediation, Solid Waste
Posted By Joseph Nemesh, PE at 12:10 PM  |  4 Comments on Tips for selecting methane gas detectors