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Natural Soda LLC 2016 Project Status Report & Annual Plan of Development <br /> ' 4.4 Geotechnical Program <br /> ' NS currently monitors two time-domain-reflectometry (TDR) subsurface-subsidence <br /> monitor wells, the 4A-5M and 3M-TDR. There has been no indication of surface or <br /> subsurface subsidence near the 4A-5M or 3M-TDR wells since installation. One of the <br /> TDR cables in the 4A-5M well is showing evidence of water infiltration. Two of the four <br /> TDR cables in 3M-TDR subsidence well were corrupted during installation, in 2003, and <br /> not operable. In addition to the monthly NS readings, the installation contractor also <br /> ' collects data quarterly. <br /> In 2016 the 15H-SSMW was drilled to provide subsurface subsidence monitoring via <br /> ' geophysical logging for the 15H and 16H well pairs. <br /> 4.4.1 Subsurface Subsidence Geophysical Logging <br /> ' The 15H-SSMW was drilled as a vertical subsurface subsidence monitor well to provide <br /> long term subsurface subsidence monitoring during the production of the 15H production <br /> well pair and the planned 16H production well pair. Gamma ray and casing collar locator <br /> (GR/CCL) logs were run to establish baseline conditions for future geophysical log <br /> subsidence monitoring. <br /> ' 4.4.2 Surface Subsidence Monitoring <br /> No new surface subsidence monuments (SSM) were installed in 2016. A surface <br /> subsidence survey of all 17 SSMs above NS's area of operations will be conducted in <br /> the second quarter of 2017. Results of the 2015 SSM survey are shown in Table 5 <br /> below. <br /> 4.5 Water Well Pumpage <br /> In 2016, approximately 127.9 million gallons of water was pumped from water supply <br /> wells WSW-2, WSW-3, and WSW-4 with an average of 242.6 gpm. The total pumpage <br /> from WSW-2 was 22.0 million gallons, WSW-3 was 52.0 million gallons, and the total <br /> pumpage from WSW-4 was 53.8 million gallons. <br /> 1 <br /> DAUB&ASSOCIATES, INC. , . 19 January 2017 <br />