Auckland:
Monday 4th December 2006
Melbourne:
Tuesday 21st November 2006
Sydney:
Tuesday 21st November 2006
Brisbane:
Thursday 23rd November 2006
Perth:
Thursday 23rd November 2006

Up Coming Workshops
February 07
Low-Flow Sampling / Micropurge kits
April 07
Water Level Loggers - LevelTROLL
June 07
Combustible Gas (LEL) Monitors – QRAE & MultiRAE
August 07
Landfill Gas Monitors – GA2000

Click here to download the presentation and reference papers

Over 350 people attended the latest series of industry seminars, organised by Enviroequip in Melbourne, Adelaide, Perth, Brisbane, Sydney and Auckland.  Low-Flow Ground Water Sampling was the topic and the presenter was Mr David Kaminski of QED Environmental Systems.  Mr Kaminski, an expert on groundwater sampling methods, received very positive feedback from the events. 

Mr Kaminski covered a lot of material during the three hour seminar including how ground water sampling procedures were developed and a comparison of the common types of sampling methods.  The Low-Flow Sampling Method was discussed in detail and was followed by a demonstration of the recommended equipment for best sampling. 

Mr Kaminski showed that low-flow ground water sampling can improve sample accuracy and precision and avoid biases associated with turbid samples. The method provides flow-weighted average concentrations from typical monitoring wells, and is the best approach for determining the true mobile contaminant load in most monitoring scenarios.

The common misconception that low-flow samples represent a narrow zone within the screen was addressed.  Field experiments, laboratory simulations and numerical modeling support the position that samples are derived from the entire screen zone under low-flow pumping conditions.  Modeling also concludes that pump placement has no significant effect on the flow pattern into the well; geology is the controlling factor.

Purging very-low-yield wells was discussed.  This applies to wells that cannot be pumped at low rates (100 ml/min) without continuous drawdown.  "Minimum Purge Sampling" is less disruptive than well evacuation and minimizes sample chemistry alteration. 

The three main steps of Low-Flow Sampling were presented and demonstrated:
1) Setting the purge flow rates
2) Controlling drawdown
3) Water quality parameter stabilisation

Click here to download the presentation and reference papers

The NEW Aqua TROLL® 200, the first in a new line of water quality instruments from In-Situ Inc, monitors and logs conductivity, level/pressure and temperature in the harshest environments.

Designed to combat fouling and conserve power, the Aqua TROLL® 200 is built to extend deployment. Power on external 8-36 VDC or internal batteries that are guaranteed for 5 years when logging in 15 minute intervals. Ultra-rugged, corrosion-resistant, titanium construction and small, 0.72” (18.3 mm) diameter make the Aqua TROLL® 200 ideal for demanding marine, surface and groundwater applications.

Building on the successful Level TROLL® platform, the Aqua TROLL® 200 is SCADA and telemetry ready. Standard outputs include Modbus/RS485, SDI-12 and 4-20 mA.

Select between gauged and absolute models with ranges up to 500 psi. All feature a 4MB memory that stores up to 200,000 data points. Standard logging modes include linear, fast linear, linear average and event testing with sampling rates as fast as 1/sec. 

Applications

• Saltwater Intrusion Project
• Tide Gauge Monitoring
• Groundwater Monitoring
• Surface water Monitoring

• Wetlands Applications
• Estuary Projects
• Discharge Monitoring
• Aquifer Storage & Recovery
• Landslide Prediction

• Very competitive prices - even better if you buy in bulk. Why pay more than you need to for monitoring well materials?
• Washed and bagged - protects the material from contamination prior to use.
• Coarse thread - for easy field assembly, flush joins for no hang-ups.

In-Situ TROLL 9500 – Multi-Parameter Water Quality -
Available to Buy or Rent...
Dissolved Oxygen - Conductivity / TDS - Temp - pH - ORP - Level/Depth - Barometric pressure - Nitrate - Chloride - Ammonium – Turbidity
• Versions for Sampling, Profiling, Remote Deployment & Logging
• Up to 9 parameters in a 45mm sensor body
• Industry-leading Optical Dissolved Oxygen – RDO
• Higher Reliability – corrosion resistant housing – suitable for fresh, waste & marine waters. IP67 battery compartment.
• Proven-Reliable Twist-Lock cables & Kellums grip for easy suspension
• Smart Sensors – field replaceable sensors that remember their calibration.

See www.enviroequip.com/sales/TROLL9500.htm or contact your local office for a colour brochure.