HVO 2009 Annual Environmental Management Report - Final

Coal & Allied – Hunter Valley Operations
Groundwater Monitoring EC Results for Carrington Piezometers
The highest average EC level was CGW51A with 11,185μS/cm, the lowest average EC level was CGW6 with
2,050μS/cm (Figure 46). These results are consistent with historical data. Please refer to ‘Interpretation of
Groundwater Monitoring Results for Carrington Piezometers’ below. In addition a review of groundwater
related impacts has been undertaken for the Carrington Pit area. The report “Carrington Extended – Review
of Mining Related Impacts on the Paleochannel Groundwater System” is attached in Appendix 10.
13,000
Carrington Groundwater EC Trends
12,000
11,000
10,000
Electrical Conductivity (uS/cm)
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
Jan 09
Feb 09 Mar 09
Apr 09
May 09
Jun 09
Jul 09 Aug 09
Date
Sep 09
Oct 09
Nov 09
Dec 09
Jan 10
CGW39 CGW45 CGW46 CGW49 CGW51A CGW52 CGW52A CGW54A CGW6
Figure 46: Carrington Groundwater EC Trends
Groundwater Monitoring SWL Results for Carrington Piezometers
The standing water level results are shown in Figure 47. Piezometers into the alluvium are those with depths
to water of less than 15m. These results are consistent with historical data. Please refer to ‘Interpretation of
Groundwater Monitoring Results for Carrington Piezometers’ below. In addition a review of groundwater
related impacts has been undertaken for the Carrington Pit. The report “Carrington Extended – Review of
Mining Related Impacts on the Paleochannel Groundwater System” is attached in Appendix 10.
AEMR 2009 97