Evaluation of Source-Zone Attenuation at LUFT Sites with Mobile LNAPL

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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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

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Authors: Poonam R. Kulkarni, Thomas McHugh, Charles J. Newell, Sanjay Garg

Published: July 2015 in Soil and Sediment Contamination: An International Journal pages 917-929.

Abstract
The objective of this study is to better understand the effect of mobile LNAPL on source-zone attenuation at sites using a statistical evaluation of 3,523 leaking underground fuel tank (LUFT) sites from GeoTracker, an extensive database of chemical release sites in California. Our analysis indicates that sites with mobile LNAPL (i.e., sites with measurable LNAPL thicknesses in one or more groundwater monitoring wells (LNAPL sites)) have higher maximum dissolved groundwater constituent concentrations and significantly slower source-zone attenuation rates (i.e., changes in maximum concentrations over time) compared to sites with a history of no measurable LNAPL thickness (non-LNAPL sites). However, the evaluation indicates that, for mobile LNAPL sites, physical recovery (skimming and bailing) does not increase source attenuation rates. The results suggest a need for more careful evaluation of the potential benefits of physical LNAPL technologies.