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Archive for September, 2013

25 September 2013

Stormwater channel retrofit – new options or tried and true pre-cast concrete?

What’s the best option for retrofitting an existing gabion-lined perimeter stormwater channel? That’s the question I was investigating for a client where a portion of the channel sidewall (originally constructed with gabion baskets) had been damaged. The existing gabion channel is located between a perimeter road and a closed landfill cell and was constructed with…

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Categories: Landfill Engineering and Design
Posted By ceg-web at 12:34 PM  |  No Comments on Stormwater channel retrofit – new options or tried and true pre-cast concrete?

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