H2A Engineers Evaluate Feasibility of Converting an Existing DPE System to TPE
H2A’s Shannon Walker, PE, and Si Xu, EIT, recently completed an engineering evaluation of the feasibility of converting an existing dual-phase extraction (DPE) system to two-phase extraction (TPE). The conversion would increase groundwater drawdown and applied vacuum, thereby improving groundwater capture. The evaluation involved determining necessary well flows and associated friction losses based [...]
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H2A Expands, Adding a New Environmental Engineer to Their Staff
H2A recently expanded their staff, hiring Ms. Si Xu, an EIT and recent graduate of the University of Texas at Arlington (UTA). While pursuing her master’s degree in environmental engineering at UTA, Ms. Xu specialized in hazardous waste management and wastewater treatment. Her post-graduate project involved an investigation into the relationship between biofilm build-up [...]
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LNAPL Transmissivity Measurement Methods: A Preview of Developing Guidance (Webinar by Mike Hawthorne)
The Aquifer Protection Interest Group is proud to present its first brown bag webinar of 2011
March 23, 2011, 1-1:30pm EST
Light Non-Aqueous Phase Liquid (LNAPL) transmissivity (Tn) can provide substantial improvements to LNAPL hydraulic mobility and recoverability analyses over traditional metrics such as LNAPL thickness in wells. Although methods to measure Tn have been available since [...]
Advanced LNAPL Workshop to be Held at AEHS Conference
A Workshop on Advances in LNAPL Site Management will be held on Monday, March 14, 2011, as part of the AEHS Foundation’s Soil, Water, Energy, and Air Conference at the Mission Valley Marriott in San Diego, California. Mark Adamski of BP is the Moderator for the Workshop, and a distinguished panel of experts will be [...]
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H2A Presents “An Exploration of LNAPL Transmissivity” to the USEPA
H2A recently presented an in-depth training webinar to the USEPA titled “An Exploration of LNAPL Transmissivity.” H2A’s Mike Hawthorne identified LNAPL transmissivity as an improved metric (versus LNAPL thickness or recovery data) with respect to LNAPL mobility, recoverability, and remediation operational progress. Five techniques used to measure LNAPL transmissivity were reviewed in detail and the [...]
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H2A Presents LNAPL Webinars to the Missouri DNR
H2A’s Mike Hawthorne recently presented two, back to back, one-hour training webinars to the Missouri Department of Natural Resources. The first explored basic tenets of LNAPL science, including multiphase saturation distribution concepts and the benefits of multiphase extraction for both compositional change and saturation reduction in LNAPL remediation. The second webinar discussed LNAPL [...]
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