USGT-PFAS

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

Texas Risk Reduction Program regulations (TRRP; 30 TAC 350) establish consistent risk-based protocols for assessment and response to soil, groundwater, or surface water impacts associated with environmental releases of regulated wastes or substances.

Presented by GSI Environmental Inc., this popular and informative training series is a must for professionals who need a working understanding of TRRP and those needing to stay up-to-date with the latest TCEQ TRRP guidance and policies.

TRRP Training Course (2 Days): Provides an overview of the TRRP framework and step-by-step training on property assessment and response action procedures established under the TRRP rule

Attendees will become acquainted with rules, key guidance and policies covering affected property assessments, protective concentration levels, and response actions. The course material presents strategies for efficient project management in compliance with TRRP and explains the various report forms adopted by TCEQ.

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Sponsored by: ​
Texas Association of Environmental Professionals (TAEP) TAEP is the premier organization for environmental professionals in the State of Texas. The goals of TAEP include the advancement of the environmental profession and the establishment of a forum to discuss important environmental issues. TAEP members receive a 10% discount. Please call 713.522.6300 for the code.

Dates and Location

Dates

June 14th and 15th, 2022

Location

Crowne Plaza River Oaks 2712 SW Freeway Houston, Texas 77098 713.523.8448 http://www.crowneplaza.com/

Price and Registration

Early-Bird Price

(Paid by May 1, 2022)
$XXX

Standard Price

(Paid after May 1, 2022)
$XXX

TAEP Membership Price

$XXX

Government Price

$XXX
Lodging and meals are not
included in course cost
REGISTER HERE
Download The Latest Version Here

USGT-PFAS solves saturated-unsaturated subsurface flow of water and transport / transformation of PFAS using unstructured grids.

An unstructured grid version of MODFLOW called MODFLOW-USG has been released by the USGS to provide flexibility in gridding for MODFLOW groundwater flow solutions. Sorab Panday, Principal at GSI, is a lead developer of MODFLOW-USG and worked closely with the USGS on its development.
USGT-PFAS
Unstructured grids allow for inclusion of various cell geometries and grid-nesting methodologies to discretize the domain as well as inclusion of various other flow processes and domains such as flow through interconnected one-dimensional features like fractures, karst, wells, or channels in a fully implicit formulation using the “Connected Linear Network” (CLN) Package. The code is in the public domain and is freely available from the USGS website.

Further development of MODFLOW-USG has continued within GSI to include additional flow and transport capabilities in the MODFLOW-USG-Transport (USGT) code. USGT-PFAS was part of this development and is now released within USGT. Major features of USGT include:

  • 3-D saturated / unsaturated flow (Richards Equation) in the subsurface using unstructured grids. Option to only solve groundwater if vadose zone evaluation is not required.
  • Multi-species contaminant and heat transport through the saturated and unsaturated zones in the subsurface.
  • Optional dual porosity flow and transport capabilities in saturated and unsaturated zones.
  • Matrix diffusion capabilities for steady-state saturated flow.
  • Linear and non-linear adsorption of solutes on soil in mobile and immobile domains for dual porosity simulations.
  • Linear and non-linear adsorption of per- and polyfluorinated alkyl substances (PFAS) on the air-water interface in the vadose zone in mobile and immobile domains for dual porosity simulations.
  • Branched chain decay reactions (zeroth and first order kinetics) of solutes in water, and on soil in mobile and immobile domains for dual porosity simulations. Branched chain decay is included on the air-water interface in mobile and immobile domains for dual porosity simulations for simulating decay of precursor PFAS.
  • Mass transfer (precipitation) of solutes out of the dissolved phase.
  • Agricultural or remedial system return-flow package (QRT) with solute treatment.
  • Density dependent flow and transport.
  • Time varying material properties
  • Automated time stepping
  • Turbulent flow through conduits
  • Several user-friendly mechanisms to restart or continue simulations and simplify processing

These features are available through the USGT software distributed as open source and public domain. Click here to obtain the source code, executable, and documentation.

USGT has been coded in the MODFLOW style whereby all inputs and outputs may be in ASCII text readable formats. Therefore, input datasets may be developed, and output results may be processed manually. There are also graphic user interfaces (GUIs) developed for MODFLOW which support USGT that may be used to generate the input files and process simulation output. These include the Groundwater Vistas software (www.groundwatermodels.com), and the GMS Groundwater Modeling System

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