Recent Posts

News Archive

Subscribe to News

Mar
13

H2A Welcomes Dr. Rangaramanujam Muthu to Our Team

written by Andrea

H2A Environmental, Ltd. is very pleased to welcome Dr. Rangaramanujam Muthu to our team of non-aqueous phase liquid (NAPL) experts.  Dr. Muthu is a co-author / co-developer of the forthcoming American Petroleum Institute software and guidance for the calculation of LNAPL transmissivity from LNAPL baildown tests for unconfined, confined, or perched LNAPL.  In addition, Dr. […]

Read More About - H2A Welcomes Dr. Rangaramanujam Muthu to Our Team »

Aug
15

H2A is Using LNAPL Transmissivity to Make MDPE More Efficient and Cost Effective

written by Shannon

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 […]

Read More About - H2A is Using LNAPL Transmissivity to Make MDPE More Efficient and Cost Effective »

Jun
3

H2A Completes LNAPL Conceptual Site Model (LCSM) Updates for a Large-Scale Refinery

written by Shannon

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 […]

Read More About - H2A Completes LNAPL Conceptual Site Model (LCSM) Updates for a Large-Scale Refinery »

May
25

LNAPL – It’s Not Just Unconfined

written by Andrea

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 […]

Read More About - LNAPL – It’s Not Just Unconfined »

May
6

LNAPL Remediation Drivers

written by Andrea

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 […]

Read More About - LNAPL Remediation Drivers »

Mar
17

LNAPL Transmissivity Measurement Methods: A Preview of Developing Guidance (Webinar by Mike Hawthorne)

written by Andrea

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 […]

Read More About - LNAPL Transmissivity Measurement Methods: A Preview of Developing Guidance (Webinar by Mike Hawthorne) »

Mar
11

Advanced LNAPL Workshop to be Held at AEHS Conference

written by Andrea

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 […]

Read More About - Advanced LNAPL Workshop to be Held at AEHS Conference »

Mar
4

H2A Presents “An Exploration of LNAPL Transmissivity” to the USEPA

written by Andrea

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 […]

Read More About - H2A Presents “An Exploration of LNAPL Transmissivity” to the USEPA »

Mar
1

H2A Presents LNAPL Webinars to the Missouri DNR

written by Shannon

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 transmissivity as […]

Read More About - H2A Presents LNAPL Webinars to the Missouri DNR »

Contact Us

H2A Environmental, Ltd.
1862 Keller Parkway
Keller, TX 76248

817.380.3888 Phone
682.593.0660 Fax

H2A Environmental, Ltd. on LinkedIn