PRAXIS ENVIRONMENTAL TECH. INC.
Where Innovation Meets Excellence
PHONE: (650) 548-9288
PNEULOG APPLICATIONS
Site Characterization, Remedial Optimization, and Site Closure
PneuLog, a characterization technology for the vadose zone, can be deployed during any stage of remediation. From initial site characterization to optimization, through site closure, PneuLog is utilized to accelerate cleanup, reduce long-term operational costs, and support closure of SVE systems. The technology utilizes in-well instrumentation to continuously measure air permeability and contaminant concentrations along well screens during vapor extraction. Vertical soil heterogeneities are clearly defined in individual wells identifying preferential flow paths and mass transfer constraints.
PNEULOG DATA
Pneulog Data is useful for:
Accelerated Site Characterization
SVE Design & Optimization
Bioventing Design & Optimization
Risk Assessments & Site Closure
SITE CHARACTERIZATION
PneuLog provides real-time assessments of subsurface conditions immediately following well installation. Contaminant concentrations and soil heterogeneities are recorded by depth along well screens.
Pneulog profiles from several wells are then synthesized into a comprehensive model of subsurface heterogeneities and contaminant distribution. This detailed data set yields a more realistic conceptual site model than conventional characterization data for designing optimized remediation systems focusing on source zones. The improved conceptual site model also generates more realistic input for transport modeling to set risk-based clean up goals. PneuLog identifies the low permeability materials with high moisture contents often missed in geologic logs. Such intervals govern vaporous diffusion but are rarely included in conventional transport modeling. This method of expedited characterization enables the rapid deployment of an optimal, efficient SVE system that can later be expanded or augmented as site conditions dictate.
SVE OPTIMIZATION WITH PNEULOG
PneuLog® optimizes &
accelerates remediation by:
Defining contaminant & air production
Generating data to improve conceptual and predictive models
Providing optimum well screen intervals
Locating & defining mass transfer limitations
Delineating the contaminant source
HOW DO I KNOW WHEN TO SHUT OFF MY SVE SYSTEM?
SITE CLOSURE
This is a very common concern of SVE operators who are looking to shut their system off and close their site but lack the relevant supporting data. They may have been running SVE for years and now face shrinking budgets. A common application for PneuLog is to identify definitively the elimination of residual sources in the vadose zone as as compared to volatilization of contaminants from underlying groundwater, i.e., when does the SVE system become an inefficient groundwater cleanup technology?
REQUEST INFORMATION
If you would like information on Pneulog as it applies to your site please feel free to contact us by phone and we will be happy to assist you. You may also contact us by email below. Please provide us with specifics of your site including depth to ground water, nature of the contaminants and whether there is an existing Soil Vapor Extraction system in place. We look forward to hearing from you.