Environmental Groundwater Monitoring and Site Characterization Overview
The goal of environmental groundwater monitoring is to provide information on changes in groundwater environmental conditions at the site or in a specific medium, over time, usually at fixed locations. This information, in turn, is often used in making decisions regarding the need to do additional work at the site, usually based on potential risks posed by site conditions that may require remedial action.
- Environmental Groundwater Monitoring and Site Characterization Overview
- Groundwater Monitoring Well Design and Installation
- Environmental Drilling Method for Groundwater Monitoring Well
Drilling technology is one of the necessary to construct a monitoring well. The drilling method depends on the specific site factors, including the geological conditions of the site, the type of pollutants expected, and the type of soil samples.
- Groundwater Monitoring Well Design
The requirements and standard structure for environmental monitoring well design.
- Environmental Monitoring Well Installation
The components of environmental monitoring well shall include the well casing, well screen, screen filter, annulus seals and well head protection.
- Environmental Groundwater Sampling
- Groundwater Sampling and Analysis Plan (SAP) and Sampling Preparation
Implementation of a comprehensive and well thought out SAP should ensure that ground-water sample collection procedures are consistent from one sampling event to the next, thus reducing the potential for sampling team related error and bias.
- Low Flow Purging
Purging strategies, as described in ASTM Standard D 6452 (ASTM, 2004g), are divided into two general categories: those appropriate for high-yield sampling points (points that do not go dry during purging and sampling) and those appropriate for low-yield sampling points (points that may go dry during purging and sampling).
- Sample Pre-treatment Options
Sample pretreatment must be performed at the wellhead at the time of sample collection to ensure that physical and chemical changes do not occur in the samples during the time that the sample is collected and after the sample container has been filled and capped.
- Groundwater Characterization Tools
- High Resolution Site Characterization Tools
Real-time measurement technologies include any data generation method that enables reliable measurement or collection and analysis of environmental media in a time frame that facilitates execution of a DWS. These measurements typically result in a much greater density of information and are available to direct field activities in time frames shorter than those commonly achieved with conventional sampling and analytical methods.
- Portable Gas Chromatograph
Portable gas chromatography is a flexible, widely used for VOC chemical detection piece of equipment, which can complete chemical analysis within 10 minutes for both qualitative and quantitative analysis of a sample. General use of portable gas chromatography basically includes site characterization, remediation and engineering inspection processes. At the same time, as a rapid characterization equipment, can also be used for laboratory testing and industrial process monitoring.
- Smart Sensor for Environmental Monitoring
For hydrological and groundwater quality monitoring project in specific sites , a large number of probes can be deployed in the regional monitoring points, routinely collecting measurement readings. The data can be sent to the transfer station for processing, and then by the relay station through radio or communication signals, transmitted to the client’s workstation. The staff will be able to understand all aspects of target monitoring area in a timely fashion and make comprehensive response.
- Environmental Application for FLUTe
FLUTe methods include a wide variety of flexible liner designs to perform functions, including groundwater sampling, transmissivity measurement, groundwater contaminant profiling and borehole sealing.
- Passive Sampling
All passive samplers are deployed down a well to the desired depth within the screened interval or open borehole to obtain a discrete sample without using pumping or a purging technique.
Source of the articles:TDA US-China Groundwater Environmental Protection Cooperation Program（2014-2016）