An Enhanced Aerobic Bioremediation System at a Central Production Facility – System Design and Data Analysis

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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(Paid by May 1, 2022)
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Authors:  Sheau-Yun (Dora) Chiang, P. Petkovsky, M. Beltz, S. Rouse, T. Boyd, Charles J. Newell, Thomas McHugh

Published: October 1993 in Natioanal Groundwater Association (NGWA).
Abstract
A successful field demonstration of the enhanced in-situ aerobic bioremediation with remarkable results took place during the period of August 1, 1991 through year-end 1992 at a central production facility in Michigan.
The in-situ soil logging and groundwater sampling by the cone penetrometer/porous probe system provided a real-time definition of the groundwater flow “channel” and a clear delineation of the plume extent. That facilitated the design of the closed-loop bioremediation system, consisting of two downgradient pumping wells to completely capture the plume and two pairs of bi-level injection wells located upgradient of the plume. The purged groundwater from the two pumping wells after amending with dissolved oxygen is directly reinjected to the two pairs of upgradient bi-level injection wells. In addition, the performance of the system is monitored by 17 multilevel wells. Each piezometer consists of four vertical sampling levels, providing a total of 68 sampling points to fully define the three-dimensional characteristics of the BTEX and DO plumes.
Based on the hydograph analysis of the groundwater data, the closed-loop bioremediation system has been operating properly. In addition, a particle tracking analysis showed groundwater flowlines converge to the pumping wells demonstrating the effectiveness of the plume capture.
The trend analysis showed a consistent decline of BTEX concentrations at all of the 68 sampling points. Furthermore, the concentrations at the lower portion of the aquifer have decreased to near the detection limits. A zero moment analyses showed the soluble BTEX mass decreased from the initial 0.96 lbs before the start-up (8/1/91) to 0.08 lbs during the 6/92 sampling, a 91% reduction. A first-order decay was exhibited by the mass degradation curve and the rate of the degradation was estimated to be 0.6%/day.