H2A’s Mike Hawthorne Coauthors NAPL Article in Ground Water Monitoring & Remediation on Identification of Confined and Perched NAPL
H2A’s J. Michael (Mike) Hawthorne, PG, coauthored an article recently published in Ground Water Monitoring & Remediation titled “Identification and Assessment of Confined and Perched LNAPL Conditions.” Coauthors include Andrew Kirkman and Mark Adamski of BP Americas. The article presents powerful tools that use routinely collected data to identify confined or perched LNAPL. Routinely collected [...]
H2A’s Dr. Ranga Muthu to Conclude Training on API’s LNAPL Transmissivity Spreadsheet
H2A’s Dr. Rangaramanujam “Ranga” Muthu, co-author of the American Petroleum Institute’s (API’s) new Microsoft ExcelTM spreadsheet tool for estimating LNAPL transmissivity using baildown test data, will present the second part of a two-part training session on the spreadsheet on March 14, 2013, from 1:00 to 1:30 PM EST. This session is only available to National [...]
H2A’s Dr. Ranga Muthu to Provide Training on API’s LNAPL Transmissivity Spreadsheet
H2A’s Dr. Rangaramanujam “Ranga” Muthu, co-author of the American Petroleum Institute’s (API’s) new Microsoft ExcelTM spreadsheet tool for estimating LNAPL transmissivity using baildown test data, will present the first part of a two-part training session on the spreadsheet on February 27, 2013, from 1:00 to 1:30 PM EST. This session is only available to National [...]
H2A is Using LNAPL Transmissivity to Make MDPE More Efficient and Cost Effective
H2A recently completed an evaluation of LNAPL transmissivity (Tn) at a major international airport in Texas. The results are being used to further enhance the existing mobile dual-phase extraction (MDPE) remediation strategy for the site by focusing efforts on wells exhibiting the highest LNAPL transmissivity. By doing so, H2A has realized increases in product recovery [...]
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ANSR Listed as Resource in USEPA’s TechDirect Newsletter
The June 2011 issue of Applied NAPL Science Review (ANSR) was cited in the U.S. Environmental Protection Agency’s July 2011 issue of the TechDirect Newsletter, a publication that identifies new guidance resources related to the assessment and remediation of contaminated media. ANSR was listed as a web resource that “provides technical insight into the science [...]
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H2A Performs 12-Day MDPE Event in Angleton, Texas
H2A is currently performing a 12-day, mobile dual-phase extraction (MDPE) event at a former petroleum storage tank site located within TxDOT right-of-way in Angleton, Texas (the Site). This is the latest of seven MDPE events performed by H2A at the Site over the past several years. During a 12-day event performed in March of this [...]
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H2A Completes LNAPL Conceptual Site Model (LCSM) Updates for a Large-Scale Refinery
H2A’s J. Michael Hawthorne, PG, Shannon Walker, PE, and Si Xu, EIT, recently completed an extensive redesign of the LNAPL Conceptual Site Model (LCSM) for a large-scale oil refinery located in southeast Texas. The analysis included a detailed review of all gauging and well construction data, fluid physical properties, aquifer properties, multiple LNAPL recovery and [...]
LNAPL – It’s Not Just Unconfined
Abstract of presentation to be given by Mike Hawthorne of H2A (coauthors Andrew Kirkman of AECOM and Mark Adamski of BP America) at the LNAPL Site Management Strategies Session of the 2011 Battelle Bioremediation and Sustainable Environmental Technologies Conference, Reno, Nevada, June 27-30, 2011. Background. Existing LNAPL distribution literature is heavily biased towards ideal unconfined conditions [...]
LNAPL Remediation Drivers
One way to look at light non-aqueous phase liquid (LNAPL) drivers for remediation is to break them down into: (1) physical science issues and (2) human science issues. Physical science drivers include saturation and composition risks. Saturation risks are primarily related to migration of LNAPL, if the LNAPL mass present is great enough for migration [...]
Employee Spotlight – Shannon S. Walker, PE
Shannon has been a Senior Remediation Engineer at H2A for almost four years. She holds both a MS and BS in Chemical Engineering, and a BS in Civil Engineering, from West Virginia University in Morgantown, West Virginia. She has worked in environmental consulting for over ten years, specializing in site remediation and regulatory compliance. Q: [...]
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