Practical Methods for Demonstration of Groundwater Remediation by Natural Attenuation (RNA)

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/

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Authors: J. Nevin, Thomas McHugh, Charles J. Newell, John A. Connor, N. Novick

Published: May 1998 in GSI.

Abstract

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The ASTM Standard for Remediation by Natural Attenuation (RNA) provides practical guidelines for detection and measurement of groundwater contaminant plumes based on site-specific data analyses. These simple data evaluation methods can be used to assess the appropriateness of RNA as a groundwater remediation technology at a petroleum release site, either as a stand-along remedy or as a component of a phased remediation strategy. Application of RNA involves demonstration of plume remediation based upon converging “lines of evidence” support by groundwater monitoring data:
  • Primary Lines of Evidence based on an analysis of plume trends over time;
  • Secondary Lines of Evidence based on either geochemical indicators or attenuation rate calculations;
  • Optional Lines of Evidence based on several different analysis, including modeling studies.
The ASTM Standard emphasizes that many of these lines of evidence can be developed using data plots and simple hand calculations. In some cases, however, software tools can be used to make a more definitive analysis of the data (e.g., for the trend analysis) or form the basis of a line of evidence (e.g., as an option line of evidence). The RNA Tool Kit software package developed by Groundwater Services Inc. (GSI) includes software tools and utilities which can be used to develop comprehensive RNA demonstrations using the approach prescribed in the ASTM RNA Standard.
This paper reviews the overall architecture of the ASTM RNA Standard; describes primary, secondary, and option lines of evidence; outlines the data required for each line of evidence; and discusses software tools such as the GSI RNA Tool Kit that can be used to support a site-specific RNA analysis.