IEG - Multi-level Sampling Well
As a fundamental objective of detailed geoenvironmental investigations, IEG Multi-level Sampling Well systems allow a very detailed three-dimensional soil and groundwater contamination profile to be developed. The system is capable of recovering multiple, high-quality samples of both soil vapour and groundwater simultaneously from numerous packer-isolated horizons in a single standard borehole.
- Patented design - proven engineering
- Easy to install and operate in the field
- Cost effective, time and labour saving
- Quality samples fast - repeatedly
Since many fewer boreholes are required to obtain more coverage of a site at depth, and because well purging and sampling time on site is considerably reduced, this makes the IEG MLSW a very cost effective means of site characterisation and monitoring.
The IEG MLSW can identify areas of point source contamination, or pinpoint plume boundaries whilst simultaneously facilitating the accurate determination of contamination levels in the unsaturated and saturated zone, as well as the capillary fringe. The system is used to readily and accurately delineate multi-phase contamination in three dimensions, which is vital for the design, installation, monitoring and validation of in-situ process-based soil and groundwater remediation schemes. The patented, modular system can be customised for the needs of each project during the course of a site investigation, or alternatively can be based on predetermined depths of interest.
The system offers many technical advantages over conventional single or multiple fully-screened monitoring wells, combined with significant time and cost savings which will reduce the overall cost of a site investigation, monitoring and validation programme.
Perhaps most importantly, the MLSW allows very high quality data to be generated in order to facilitate accurate detailed quantitative risk assessments based on zone-specific, undiluted and undistorted results, unlike those obtained using fully-screened monitoring wells.
In the era of MCERTS for contaminated soil and groundwater analysis, sampling error is dramatically reduced using the IEG MLSW to recover samples from sealed installations at discrete and precisely known depths rendering expensive analytical data much more reliable and cost effective.
By using the IEG MLSW to develop an accurate contamination profile, therefore, remediation system design can be realistically determined, appropriately sized and performance criteria set with confidence, reducing uncertainty and risk.
With remediation of sites on fixed budgets and programmes being a commercial reality, can you afford to continue to rely on potentially erroneous soil vapour and groundwater quality data obtained using inferior systems?
- The number of monitoring boreholes required to obtain variable depth data is less than conventional techniques.
- Less drilling means less disruption to ongoing site activities.
- Material and personnel cost for this method are by far lower than conventional sampling with piezometers or nested wells, since only one person is needed to operate the hand pump, activating all sampling horizons at the same time the number of sampling horizons installed in the saturated and unsaturated zones is practically unlimited.
- Since the samples are removed without lowering the groundwater table or creating a cone of depression, the natural flow conditions of the aquifer remain undisturbed.
- Vertical flow in the sampling area, which results in distorted analytical results, is almost entirely prevented.
- Sampling procedure can be reproduced, repeatedly, providing consistent, accurate samples for analysis.
- No distorted analysis results caused by 'relocating' of contaminants during sampling, since all components making contact with groundwater or soil air are firmly contained within the sealed system.