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Apr
7

H2A Obtains TCEQ Closure at a West Texas Industrial Plant

written by Andrea

H2A recently obtained closure from the Texas Commission on Environmental Quality (TCEQ) for a waste management unit located at an industrial plant in west Texas.  The unit, which consisted of a grey water pond used to collect discharge water from employee locker room sinks and showers, was regulated under the Resource Conservation and Recovery Act […]

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Mar
31

H2A Engineers Evaluate Feasibility of Converting an Existing DPE System to TPE

written by Shannon

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 on the […]

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Mar
25

H2A Expands, Adding a New Environmental Engineer to Their Staff

written by Shannon

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 within […]

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Jan
5

H2A Recovers over 1,600 Pounds of Hydrocarbons at a Remote Site in South Central Oklahoma Using SVE Only

written by Shannon

H2A recently utilized a trailer mounted, internal combustion engine (ICE), mobile dual-phase extraction (MDPE) system to successfully complete a 7-day, high vacuum remediation (HVR) soil vapor extraction (SVE) pilot test at a refined products pipeline release site, located in south central Oklahoma.  The area impacted is situated in a remote location within the pipeline right-of-way, […]

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Nov
21

Mixed Plume Remediation Progress at a North Texas Site

written by Shannon

At a former industrial facility located in North Texas, H2A has achieved elimination of measurable (mobile) LNAPL in 15 of 16 monitoring wells (94%).  Dissolved BTEX plume reductions of 50-70% have also been noted after operating a custom-designed, multiphase extraction (MPE) remediation system at the site for only three years.  Therefore, both mass removal and […]

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Jun
24

H2A’s Mike Hawthorne to Discuss LNAPL Transmissivity at the 17th IPEC

written by Andrea

Mike Hawthorne, Principal Remediation Geoscientist with H2A, will discuss LNAPL Transmissivity as an Improved Metric for Hydraulic Recovery  at the 17th International Petroleum and Biofuels Environmental Conference (IPEC) in San Antonio, Texas, from August 31 through September 2, 2010.  Mike will detail why LNAPL Transmissivity is an excellent metric, how it can be calculated, and […]

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May
4

Risk3T™ Now Available for Beta Testing – Risk Assessment Calculations in EQuIS®

written by Shannon

H2A now has available for beta testing a new three-tiered environmental risk assessment calculator that fully integrates within the EQuIS Environmental Database operational environment.  Risk3T™ is a flexible standard program designed to calculate risk-based closure levels for any regulatory risk assessment program based on the RAGS/RBCA environmental risk assessment equations.  Risk3T™ contains programming for U.S. […]

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Mar
15

H2A’s Mike Hawthorne to Speak at TCEQ 2010 Trade Fair

written by Shannon

Mike Hawthorne, Principal Remediation Geoscientist with H2A, will be presenting an advanced level technical talk on LNAPL Transmissivity at the TCEQ 2010 Trade Fair in Austin, Texas on May 5, 2010.  Mike’s presentation will detail why LNAPL Transmissivity is an excellent metric, how LNAPL Transmissivity can be calculated, and when to use LNAPL Transmissivity under […]

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Dec
20

H2A Awarded Multi-Year O&M Contract at DFW Airport

written by Shannon

H2A was recently awarded a contract to work directly for the DFW International Airport (DFW), Environmental Affairs Department, performing remediation system operation and maintenance (O&M), system optimization, quarterly storm drain inspection, LNAPL plume evaluation, and implementation of periodic mobile dual-phase extraction events.  The contract commences on January 1, 2010, for an initial two-year period with […]

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Nov
8

TRRP 12A: H2A at Work with the TCEQ

written by Shannon

Mike Hawthorne, H2A’s principal geoscientist, is currently serving on the TRRP-12A, NAPL assessment guidance document development team under the direction of Charles Stone with the Texas Commission on Environmental Quality (TCEQ).  H2A previously assisted in development of TCEQ’s TRRP-32, Risk-Based NAPL Management regulatory guidance.  The new TRRP-12A will provide detailed guidance on techniques to assess […]

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

817.380.3888 Phone
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