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CASE STUDY: ACCELERATED SITE CLOSURE VIA MULTIMODAL LNAPL TRANSMISSIVITY TESTING AND PLUME STABILITY ANALYSIS, WEST TEXAS
Daigle, T., J.M. Hawthorne, L. Reyenga, and D. White.
2018 IPEC: 25th International Petroleum Environmental Conference, October 30 - November 1, 2018, Denver, Colorado. 20 slides, 2018
The Former Waddell Compressor Station, located southwest of Midland/Odessa, Texas, is regulated by the Texas Railroad Commission and is enrolled in the Operator Cleanup Program, which allows for risk-based site closure for remediation of LNAPL contamination in the form of natural gas condensate. The site has >20 yrs of groundwater monitoring data. LNAPL transmissivity testing was performed at five wells in 2018 using both oil/water ratio test methods and mobile dual-phase extraction (MDPE) data analysis. Transmissivity calculated for both methods in accordance with ASTM E2856-13 indicated that the LNAPL is not hydraulically recoverable, which was corroborated when <0.01 gal of fluid-phase LNAPL out of ~1,180 total gal of water was recovered during the MDPE event. A dissolved-phase plume stability analysis was also performed using the Groundwater Spatiotemporal Data Analysis Tool (https://www.api.org/oil-and-natural-gas/environment/clean-water/ground-water/gwsdat ). Results suggest that the dissolved-phase plume is stable to decreasing in mass and is not expected to migrate beyond the current extent. Slides: https://cese.utulsa.edu/wp-content/uploads/2018/11/IPEC-2018-Accelerated-Site-Closure-Via-Transmissivity-Testing-and-Plume-Stability-Analysis.pptx
2018 IPEC: 25th International Petroleum Environmental Conference, October 30 - November 1, 2018, Denver, Colorado. 20 slides, 2018
The Former Waddell Compressor Station, located southwest of Midland/Odessa, Texas, is regulated by the Texas Railroad Commission and is enrolled in the Operator Cleanup Program, which allows for risk-based site closure for remediation of LNAPL contamination in the form of natural gas condensate. The site has >20 yrs of groundwater monitoring data. LNAPL transmissivity testing was performed at five wells in 2018 using both oil/water ratio test methods and mobile dual-phase extraction (MDPE) data analysis. Transmissivity calculated for both methods in accordance with ASTM E2856-13 indicated that the LNAPL is not hydraulically recoverable, which was corroborated when <0.01 gal of fluid-phase LNAPL out of ~1,180 total gal of water was recovered during the MDPE event. A dissolved-phase plume stability analysis was also performed using the Groundwater Spatiotemporal Data Analysis Tool (https://www.api.org/oil-and-natural-gas/environment/clean-water/ground-w
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