H₂A is Using LNAPL Transmissivity to Make MDPE More Efficient and Cost Effective

H₂A recently completed an evaluation of LNAPL transmissivity (T_n) at a major international airport in Texas.  The results are being used to further enhance the existing mobile dual-phase extraction (MDPE) remediation strategy for the site by focusing efforts on wells exhibiting the highest LNAPL transmissivity.  By doing so, H₂A has realized increases in product recovery of up to 20 percent over historic efforts of comparable duration.  H₂A also plans to utilize LNAPL transmissivity trends over time to gauge remediation efficacy and to establish active remediation endpoints.  It should be noted however, that although LNAPL transmissivities of between 0.1 to 0.8 square feet per day typically demonstrate the limit of practical LNAPL recovery, potential Texas Risk Reduction Program (TRRP)-32 (Risk-Based NAPL Management) triggers (as established by the Texas Commission on Environmental Quality) must also be considered.