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GEI Consultants Acquires H2A Environmental, Ltd.

written by Andrea

Boston, Mass.—November 6, 2014— GEI Consultants, Inc., one of the nation’s leading geotechnical, environmental, water resources, and ecological science and engineering firms, announced today the acquisition of H2A Environmental, Ltd., an environmental consulting and remediation firm specializing in non-aqueous phase liquid (NAPL) management and risk-based remediation and site closure. H2A became a subsidiary of GEI when the transaction officially closed on November 1, 2014, and will continue to service clients and conduct business out of their Keller, TX office.

H2A, founded in 2000 by Mike and Kay Hawthorne, provides strategic scientific solutions for complex soil and groundwater contamination problems. They have developed a specialty niche in understanding the distribution, transport, and recoverability of petroleum hydrocarbons and other non-aqueous phase liquids (NAPLs) in the subsurface. Their services include data analysis, expert testimony, field data collection, pilot studies and full-scale NAPL remediation. Their clients include several of the major petroleum companies and DFW airport. After the acquisition, founders Mike and Kay Hawthorne, along with all of the H2A staff, will continue on with the company.

Raymond Hart, P.E., president of GEI Consultants, emphasized that “over the past 14 years, H2A has established a reputation for being responsive to the specific needs and concerns of its clients, and for providing innovative solutions for NAPL remediation projects. We think this acquisition will be a great fit as both firms’ core missions have always been the same: to provide professional services of exceptional value to our clients.The addition of H2A’s NAPL experience adds tremendous capabilities to help us deliver superior project support to our clients in Texas.”

“We are impressed with GEI’s national reputation for technical excellence, and are excited to become part of GEI’s organization and culture,” says Mike Hawthorne. “I am certain that joining GEI enhances our ability to service our many long-time H2A clients, for which we will continue to deliver the responsive professional services they expect, with the same team, and without interruption. At the same time, H2A’s skills and experience add further strength and depth to GEI’s environmental and ecological services supporting its many government, energy, and commercial clients.”

H2A currently employs 12 staff from their office in the Ft. Worth, Texas area, while GEI employs around 700 staff across the nation. GEI Consultants, Inc., P.C., a Delaware corporation, is an affiliate of GEI Consultants, Inc., a Massachusetts corporation.

GEI’s multi-disciplined team of engineers and scientists deliver integrated water resources, environmental, ecological, and geotechnical engineering solutions to diverse clientele nationwide. The firm has provided a broad range of consulting and engineering services on over 35,000 projects in 50 states and 22 countries. For more information, please visit


H2A Heads to Battelle’s Ninth International Conference on Remediation of Chlorinated and Recalcitrant

written by Andrea

Battelle LogoH2A’s Mike Hawthorne will present an update on his research (conducted jointly with Randy St. Germain of Dakota Technologies, Inc.) into detailed forensic analysis of laser induced fluorescence (LIF) data.  Modern risk-based light non-aqueous phase liquid (LNAPL) remedies at complex sites require high-resolution characterization data to develop comprehensive LNAPL conceptual site models (LCSMs) sufficient to support risk-based remedies.  Historically, LIF data has been used in aggregate form (percent of the reference emitter [RE]) to identify the occurrence and distribution of LNAPL at a site.  However, by performing a lifetime fitting analysis of the LIF data to break down each waveform into individual channel magnitudes and lifetimes, and utilizing a combination of univariate and multivariate statistical analyses and modeling of that waveform data, LIF borings can be classified into groups of similar/dissimilar LNAPLs.  In addition, gradients through the LIF borings, such as LNAPL weathering gradients, can be identified and modeled.  Finally, based on established LIF standards for given LNAPL types, individual LNAPLs can be fingerprinted to determine gross LNAPL type throughout a LIF investigated LNAPL plume.  Ultimately a three dimensional model of LNAPL group distributions can be developed for a site, allowing optimization of detailed well chemical LNAPL analyses and targeted application of specific LNAPL remedies.

H2A’s Shannon Walker, along with co-authors Dr. Rangaramanujam Muthu (H2A), Terry Vandell (Phillips 66), and Mike Hawthorne, authored a poster presentation titled “Improved LNAPL Conceptual Site Modeling and Remediation Management Using Automated Excel® Tools,” also to be presented at the conference.  The poster discusses a southwestern refinery, where stratigraphic traps created by a confining layer prevent LNAPL migration in the downgradient direction.  However, continued effectiveness of the traps is a concern during periods of decreased groundwater elevation.  The facility desired a simple system designed to be implemented by field personnel that facilitates rapid evaluation of LNAPL migration potential based on a relatively small subset of gauging data.  The spreadsheet tool thereby guides operational adjustments to the existing active hydraulic recovery and migration control system.

The conference, presented and organized by Battelle, is being held May 19 through 22, 2014, in Monterey, California.  Sponsors include other leading organizations active in site remediation research and application and attendees include scientists, engineers, regulators, and other environmental professionals representing universities, government site management and regulatory agencies, and R&D and manufacturing firms from more than 30 countries.

Note:  Battelle logo was obtained from their webpage (


H2A Invited to Speak at the Texas Association of Environmental Professionals April Luncheon Meeting

written by Andrea

TAEP LogoH2A’s Mike Hawthorne will speak this Thursday, April 17, at the Texas Association of Environmental Professionals (TAEP) April Luncheon Meeting, being held at Brady’s Landing Restaurant in Houston, Texas. Mike’s presentation, titled “Risk-Based LNAPL Remedies: When Does Recovery Make Sense?” will discuss the role LNAPL transmissivity plays in decision-making regarding implementation of active LNAPL recovery at a site. LNAPL transmissivity is an excellent metric for identifying when we CAN recover LNAPL, but it cannot tell us when we SHOULD. Remediation drivers, which include both technical and non-technical risks, ultimately determine the need for active LNAPL recovery.

TAEP is the premier organization for environmental professionals in the State of Texas, with nearly 300 local members and a total of four chapters state-wide. TAEP provides environmental professionals with active organizations that focus on multi-disciplinary issues and whose primary aims are the advancement of the environmental profession and the establishment of a forum to discuss important environmental issues. TAEP typically meets on the third Thursday of each month and features a guest speaker addressing one of the most pertinent environmental issues of the day. The meetings include excellent networking opportunities for members and guests. You can register to attend the meeting on Thursday by clicking here.

Note: TAEP logo and orginization details were obtained from the TAEP webpage (


H2A to Co-Present an LNAPL Workshop at the March 2014 AEHS Conference

written by Andrea

AEHS LogoH2A’s Mike Hawthorne, along with Sanjay Garg of Shell Global Solutions, Mark Lyverse of Chevron Technology and Energy Company, and Chet Clark, also of Shell Global Solutions, are presenting a workshop titled “Light, Nonaqueous-Phase Liquid (LNAPL): Risk-Based Assessment of Recoverability” at the Association for Environmental Health and Sciences (AEHS) Foundation’s 24th Annual International Conference on Soil, Water, Energy, and Air, being held this week (March 17-20) at the Mission Valley Marriott in San Diego, California.
This session will discuss some novel and interesting risk-based strategies that are being advanced, including decision frameworks, field assessment tools, approaches for assessing LNAPL recoverability, and remedial approaches.  Risk-based LNAPL management strategies are evolving.  New tools and novel approaches are developing and being applied to help guide the “if, when, what, and where” of risk-based NAPL decision making.  Representatives from industry, consulting, regulatory agencies, and academia are invited to attend.
Note:  Conference description and logo were obtained from the Association for Environmental Health and Sciences (AEHS) Foundation webpage (


“Preying” on LNAPL Using the Next Generation H2AWKTM

written by Andrea

H2AWKOne of our top priorities at H2A is implementation and management of strategic, effective, efficient LNAPL remediation efforts on behalf of our clients.  One way we do this is through heavy reliance on LNAPL transmissivity as a leading, progress, and shutdown metric for hydraulic recovery of LNAPL.  And, we’re not just concerned with IF recovery makes sense at your site, but WHERE… where do we focus our efforts (i.e., your money)?

ASTM’s Standard Guide for Estimation of LNAPL Transmissivity (E2856-13), identifies baildown/slug tests, manual LNAPL skimming tests, recovery data-based methods, and tracer test-based methods as reliable techniques by which to measure LNAPL transmissivity.  Last year, H2A developed the H2AWK™ system (patent in progress) to facilitate oil/water ratio testing, a recovery data-based method involving measurement of the steady-state LNAPL/groundwater production ratio during constant groundwater drawdown.

Development of the H2AWK™ instrument allows H2A to quantify volumetric LNAPL and water production from individual wells during oil/water ratio tests.  The primary benefit of using the H2AWK™ is the generation of reliable data, the accuracy and precision of which cannot be matched.  This is absolutely critical when quantifying and reporting LNAPL transmissivities that will be used to enhance a site’s LNAPL Conceptual Site Model (LCSM), make critical decisions regarding how remediation systems are managed, and determining when it makes sense to cease hydraulic recovery of LNAPL.

Current H2AWK™ (third generation model) design improvements include significant modifications to the unit, most notably a modular-based design for quick assembly/disassembly in the field, and the addition of a dual-diaphragm pump, enabling operation at remote wells not currently equipped with extraction equipment.  These improvements will make the unit more operator-friendly, safer, and easier to transport and decontaminate.  H2A has also begun design and construction of the fourth generation H2AWK™, a higher volume model with a larger holding tank that will also incorporate a dual-diaphragm pump.  The fourth generation model will also be a modular unit like the third generation model.

How can we make our H2AWK™ system and LNAPL transmissivity work for you at your site?


H2A’s Mike Hawthorne to be a Co-Instructor at the ASTM Workshop on LNAPL Transmissivity

written by Andrea


Mike Hawthorne, one of the co-authors of the ASTM Guide on Estimating LNAPL Transmissivity, and a leading expert on LNAPL science, has been invited to provide a training session on the theory and practical application of LNAPL transmissivity at the upcoming ASTM Workshop on Estimating LNAPL Transmissivity, sponsored by ASTM Committee E50.04 on Environmental Assessment, Risk Management, and Corrective Action.

LNAPL transmissivity is being increasingly recognized as the preferred metric for use at sites impacted with LNAPL to satisfy the “maximum extent practicable” recovery criteria, in lieu of measured/apparent LNAPL thickness in wells. The objective of this workshop is to provide a basic understanding of how LNAPL transmissivity can be estimated, and how to use estimated values to better understand the practical limits for hydraulic recovery.  This information can then be used to make effective decisions regarding LNAPL assessment, management, and remediation.

The workshop will be held Thursday, January 30, 2014, at the Hyatt Regency hotel, located in Houston, Texas.  If you would like to participate, you can register via the following link:

(Workshop description and logo from the ASTM Meetings & Symposia section webpage)


H2A’s Mike Hawthorne to speak at the 2013 Texas Environmental Superconference

written by Andrea

TX Enviro Superconference Logo

Mike Hawthorne, of H2A Environmental, Ltd., will be speaking on “The Use of Modeling in Site Remediation” at the 25th edition of the annual Texas Environmental Superconference, Texas’s award-winning environmental conference, which will be held on Thursday and Friday — August 1-2, 2013– in Austin at the Four Seasons Hotel.  Co-presented by the State Bar of Texas Environmental and Natural Resources Law Section, the Air & Waste Management Association – Southwest Section, the Water Environment Association of Texas, the Texas Association of Environmental Professionals, The Auditing Roundtable, and the American Bar Association Section of Environment, Energy, and Resources, the conference routinely draws in excess of 500 attendees from both the public and private sectors.
Speakers include EPA Regional Administrator Ron Curry, TCEQ Chairman Bryan Shaw, and Environmental Law Institute President John Cruden, as well as other distinguished representatives from the public and private sectors.  Topics include:  Case Law Update —  “Silver Wings and Golden Rings,” Water Issues – “Duel at Silver Creek,” Solid Waste Update – “Silver Filling,”  Legislative Update – “Silverado,” Air Quality – “Silver Skies,” Macondo – Lessons to be learned from Trial – “Silver Threads and Golden Needles,”  TCEQ Chairman – “Ag,” EPA Regional Administrator – “The Silver Star,”  Environmental Challenges – “Silver Linings Playbook,” The Use of Modeling in Site Remediation – “Silver Bullet,”  Regulation/Toxic Tort & Nuisance Litigation – “Silver Standard, Site Assessment Pitfalls – “One More Silver Dollar, ” Environmental Disclosure – “Silver Polish,” Environmental Concerns Posed by Cyber Attacks – “Silver Screen,”  EPA DC Enforcement – “Silver Spurs,” Shale Plays – “White Silver Sands,” and Ethical Issues Facing Environmental Practitioners – “The Silver Tongued Devil and I.” 

(conference description and logo from the State Bar of Texas Environmental and Natural Resources Law Section webpage)


H2A Welcomes Charles D. Stone to Our Team

written by Andrea

Stone tie 1H2A Environmental, Ltd. is very pleased to announce that Charles D. Stone, P.G., P.E. has joined our team to further enhance the strategic scientific solutions we provide our clients.  Charles will be opening an Austin, Texas office for H2A, and he will provide principal level technical expertise to a wide variety of technical and regulatory issues.  The following is a brief summary of Charles’ background and experience.

Charles has provided significant contributions to the development of non-aqueous phase liquid (NAPL) assessment, groundwater classification, and remediation guidance, including for ASTM International (E-2856, E-1943, current revision of E-2531), ITRC (LNAPL-1, LNAPL-2), and the TCEQ (TRRP-8, TRRP-32, TRRP-33, Draft TRRP-12A).

Charles received his Bachelor of Science degree in Geological Sciences from The University of Texas at Austin and his Master of Science degree in Geochemistry from University of Tennessee – Knoxville.  He has additional engineering and graduate geochemistry coursework at The University of Texas at Austin.  He is a Texas-licensed Professional Engineer (P.E.) and Professional Geoscientist (P.G.) and has represented the Remediation Division on the Texas Commission on Environmental Quality (TCEQ) P.E. Workgroup and the TCEQ P.G. Workgroup.

Most recently, Charles worked for the TCEQ and its predecessor (Texas Natural Resources Conservation Commission – TNRCC) in the Technical Support Section of the Remediation Division.  Charles served as Senior Engineer and Senior Hydrogeologist responsible for providing technical support to the Remediation Division and the regulated community in the areas of exposure pathway risk calculations and modeling, groundwater hydraulics and modeling, aquifer test analysis, response action strategies, hydrostratigraphic analysis, soil and groundwater geochemistry, soil and groundwater remediation engineering, NAPL assessment and management, NAPL  remediation, monitored natural attenuation modeling and geochemistry, natural source zone depletion assessment and modeling, indoor air vapor intrusion risk assessment and modeling, environmental statistical models and analysis, surface water hydrology and modeling, and evaluation of remediation technical impracticability demonstrations.

Previously, Charles was a Project/Contract Manager in the TNRCC PST State Lead Section and was responsible for managing over 100 leaking petroleum storage tank sites in the Panhandle of Texas.  He managed specifications and budgets of State contracts for site assessment and remediation.

Prior to that, Charles managed the Hazardous Waste Division at M&E (Metcalf and Eddy) – Pacific, located in Honolulu, HI.  He managed environmental contracts for the U.S. Army Corps of Engineers, Department of the Navy, U.S. Air Force, and the U.S. Department of Transportation and was a regional M&E Technical Resource.



H2A’s Mike Hawthorne Coauthors NAPL Article in Ground Water Monitoring & Remediation on Identification of Confined and Perched NAPL

written by Andrea

Confined LNAPL Eq and NonEQ DiagramH2A’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 data includes gauging data, boring logs, visual observations of soil cores, LNAPL baildown testing, and where available – laser induced fluorescence data.  Identification of the correct LNAPL hydrogeologic condition results in more accurate LNAPL conceptual site models, improved estimates of LNAPL recovery rates and volumes, more appropriate technology applications, and improved accuracy of LNAPL remediation metrics such as LNAPL transmissivity.  The article is available at the following link:


H2A’s Dr. Ranga Muthu to Conclude Training on API’s LNAPL Transmissivity Spreadsheet

written by Shannon

Type CurvesH2A’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 Ground Water Association members (free). Preregistration at the following link,, is required by 5:00 PM EST on February 25, 2013.

While the first training session provided a general overview of the spreadsheet tool and its use, this session will focus on specific examples showing how recharge data are used to estimate the transmissivity of LNAPL occurring in both confined and unconfined conditions. Assumptions and other considerations will also be discussed.

Contact Us

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

817.380.3888 Phone
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