2015-02-12_REPORT - M1983194

• Permit No: M1983194
• IBM Index Class Name: REPORT
• Doc Date: 2/12/2015
• Doc Name: Annual Fee, Report, and Map
• From: Natural Soda, Inc.
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

AA Natural Soda, LLC 2014 Project Status Report & Annual Plan of Development
4.4 Geotechnical Program
' NS currently monitors two time - domain - reflectometry (TDR) subsurface- subsidence
monitor wells, the 4A -5M and 3M -TDR. There has been no indication of subsidence near
the 4A -5M well since installation. One of the TDR cables in the 4A -5M well is showing
' evidence of water infiltration. The 3M -TDR well was drilled late in 2003. Two of the four
TDR cables in 3M -TDR subsidence well were corrupted during installation and not used.
In 2014, readings were again taken and data was gathered from cables two and three. In
' addition to the monthly NS readings, the installation contractor also collects data quarterly;
no significant ground movement has been detected near the 3M -TDR well since the
cables were installed.
4.4.1 Subsurface Subsidence Geophysical Logging
' Initial gamma ray and casing collar locator (GR /CCL) logs were run in the DS -6, DS -7,
DS -8, DS -9, 8H and 14H production pairs during August, September, October and
November 2014. These geophysical logs will be used as a baselines for future
geophysical log subsidence monitoring in these production well pairs.
4.4.2 Surface Subsidence Monitoring
' A surface subsidence monument (SSM) was installed in 2014 to monitor for surface
subsidence above the 14H production interval. This new surface monument along with
the existing 13 monuments located throughout the well field yield a total of 14 SSMs
above NS's area of operations. A general surface subsidence survey was conducted in
May of 2013. A review of the 2013 survey indicated no surface subsidence. In 2015
NS plans to install additional surface monuments over the currently proposed 15H, 16H,
' and 17H cavities. A general surface subsidence survey of all SSMs is scheduled to be
conducted in 2015. NS conducts a general surface subsidence survey of all SSMs
every two years to monitor surface subsidence throughout the well field.
4.5 Water Well Pumpage
In 2014, approximately 84.7 million gallons of water was pumped from water supply
wells 90 -1 and WSW -2 with an average of 158.8 gpm. The total pumpage from WSW -2
was 56.3 million gallons, and the total pumpage from 90 -1 was 28.4 million gallons.
' DAUB & ASSOCIATES. INC. ,, 19 January 2015