First field test of NAPL detection with high resolution borehole seismic imaging
Conference
·
OSTI ID:797864
- LBNL Library
The purpose of this field test is to evaluate the detectability of NAPLs by high resolution tomographic borehole seismic imaging. The site is a former Department of Energy (DOE) manufacturing facility in Pinellas County, Florida. Cross-hole seismic and radar measurements were made in a shallow aquifer contaminated with non-aqueous phase liquids (NAPLs). Cone penetration test (CPT) and induction logging were performed for lithology and conductivity, respectively. The main challenge is to distinguish fluid phase heterogeneities from anomalies arising from geologic structure. Our approach is to compare measurements between locations of known contamination with a nearby uncontaminated location of similar lithology where differences in signal transmission may be attributed to fluid phase changes. The CPT data show similar lithologic structure at the locations both within and outside the NAPL-contaminated area. Zones of low seismic amplitude at about 7 m depth appear more extensive in the NAPL-contaminated area. These zones may be the result of fluid phase heterogeneities (NAPL or gas), or they may be due to the lithology, i.e. attenuating nature of the layer itself, or the transition between two distinct layers. The presence of lithologic contrasts, specifically from higher permeability sands to lower permeability silts and clays, also indicate potential locations of NAPL, as they could be flow barriers to downward NAPL migration.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Assistant Secretary for Environmental Management. Office of Science and Technology (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 797864
- Report Number(s):
- LBNL--50689; B& R EW4010000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mapping DNAPL transport contamination in sedimentary and fractured rock aquifers with high resolution borehole seismic imaging Project No. SF11SS13 FY01 Annual Report
Effect of immiscible liquid contaminants on P-wave transmission through natural aquifer samples
Project Overview: Successful Field-Scale in SITU Thermal NAPL Remediation
Technical Report
·
Fri Nov 30 23:00:00 EST 2001
·
OSTI ID:792956
Effect of immiscible liquid contaminants on P-wave transmission through natural aquifer samples
Conference
·
Thu Jan 30 23:00:00 EST 2003
·
OSTI ID:809308
Project Overview: Successful Field-Scale in SITU Thermal NAPL Remediation
Conference
·
Sun Oct 24 00:00:00 EDT 2004
·
OSTI ID:1132778