2015 Annual Report
The 2015 Annual Report and appendices are now available for your viewing below. The 2015 information covers Interim Year 3. Please scroll down this webpage for additional attachments including the earlier interim year reports and the first phase of the monitoring which established the pre-mining baseline environmental conditions:
- Interim Year 3 Annual Report
- Appendix A: Field Forms
- Appendix B: Laboratory Analytical Reports
- Appendix C: Historical Precipitation Data
- Appendix D: TWDB Groundwater Database, Navarro and Taylor Group Water Quality Data
2014 Annual Report
The 2014 Annual Report, appendixes and the presentation from the October 27th meeting is now available for your viewing below; please scroll to the bottom of the page for additional attachments including the Interim Year 1 Environmental Report and the first phase of the monitoring which established the pre-mining baseline environmental conditions:
- Interim Year 2 Environmental Conditions Colorado River Corridor
- Interim Year 2 Annual Report
- Appendix A: Field Forms
- Appendix B: Laboratory Analytical Reports
- Appendix C: Historical Precipitation Data
- Appendix D: TWDB Groundwater Database, Navarro and Taylor Group Water Quality Data
2013 Annual Report
On April 9, 2013, the Travis County Commissioners’ Court approved a modification to the contract with URS Corp., to enhance the groundwater monitoring tasks in the current monitoring plan. These enhancements were advocated by members of the public who voiced their requests at the 2012 annual public meeting convened by Travis County and requests made to the Austin Environmental Board and City Council in Autumn 2012. Since that time, city, county, and URS staff developed monitoring enhancements, identified funding, transferred funds to Travis County, obtained county auditor, legal, budget, and Commissioner Court approval to accept and encumber the funding, and then worked through the purchasing/contract modification process.
The enhancements will add the following parameters for all 10 wells in the monitoring network:
- Addition of volatile organic constituents (VOCs), polycyclic aromatic hydrocarbons (PAHs), and total petroleum hydrocarbon (TPH) to be collected during one groundwater sampling event in the current “interim year 1” sampling regime
- Addition of TPH to one sampling during next year’s (interim year 2) groundwater sampling event, with the collection of samples for additional analysis of PAHs, if a sample includes a detection of TPH.
The enhancements will include additions to the evaluation of threshold levels for geochemical constituents:
- In one change, we will add a separate comparison of analytical results between up-gradient and down-gradient well results.
- Secondly, there will be a two tier threshold system. The first tier threshold will be equal to the median value plus 2 standard deviations. The second tier will retain the original approach of evaluating the maximum value plus two standard deviations.
Feel free to contact me if you wish additional information or to discuss as I understand these are fairly technical details: Thomas Weber, TNR Environmental Quality Program Manager at [email protected] or by calling (512) 854-4629.
Below are the results of the first phase of the monitoring which established the pre-mining baseline environmental conditions.
