Thursday, October 27, 2016

EP Aquifer Test Approved

Aquifer tests are an essential part of the District's permitting process.  The Board and staff rely heavily on results of these tests to inform permit volumes and conditions.

In the spring, Electro Purification (EP) submitted a test well application to allow them to perform an aquifer test on three wells.  District staff worked with EP to design and plan an aquifer test that meets District guidelines.  The aquifer test will measure responses to abbreviated pumping simulations from the target pumping zone (Middle Trinity--Cow Creek Formation) in surrounding Upper, Middle, and Lower Trinity wells (generalized stratigraphic column showing aquifers and associated formations).  The aquifer test is a collaborative effort between the District and EP and will take two to three months to complete.

Synopsis of aquifer test activities:
EP contractors will convert the Odell 1 well into a Lower Glen Rose monitor well.  They will plug the bottom portion of the well to seal off the Cow Creek formation, so water level monitoring in the Middle Trinity above the target pumping zone can be monitored.  Then EP contractors will develop and install temporary well completions in the three test wells that allow pumping to be isolated to the target pumping zone.  They will develop and test Bridges 1 then move to Bridges 2, then Odell 2.  During the development and testing, EP contractors and District staff will be sampling water quality and water levels.  EP contractors are responsible for monitoring/sampling wells on EP leases.  District staff are coordinating with surrounding well owners to monitor/sample additional monitor well sites.  As agreed with EP, District staff will be at the well site to observe key well development and testing activities.

In anticipation of community interest and information requests and to make the aquifer test more transparent to the groundwater community, the District (with EP's support) has created a Permit Notice: EP Aquifer Test web page with the following the following information:
  • Review process overview for EP test well application
  • Timeline of key application dates
  • Discussion of well development/aquifer testing procedures
  • Frequently Asked Questions
  • EP's approved aquifer test plan

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