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-4 ? k- <br />NATURAL SODA <br />Natural Soda, Inc. <br />Plug and Abandonment Report <br />Subsidence Monitoring Well 1 -3A <br />Prepared for <br />Natural Soda, Inc. <br />By <br />Daub & Associates, Inc. <br />2013 <br />Introduction <br />The Natural Soda, Inc. (NSI) 1 -3A was a vertical rotary - drilled well. Originally drilled in 2001 as a <br />vertical sodium bicarbonate production well in the Parachute Creek Member of the Green River <br />Formation, it was recompleted in 2002 as a Dissolution Surface (DS) aquifer monitoring well. <br />The well was drilled in the Piceance Creek Basin located in Northwestern Colorado, on U.S. <br />Department of the Interior, Bureau of Land Management (BLM) property. The surface location <br />is in the SE quarter of the SW quarter of Section 26, Township 1 South, Range 98 West, in Rio <br />Blanco County, Colorado. The as -built location is 39.929910000° North latitude, <br />108.363790000° West longitude, referenced to NAD 27. The as -built ground elevation is <br />6,687.8 feet above Mean Sea Level. Depths mentioned in the text are measured depths (MD) <br />reported relative to ground level (GL). The primary objective of the 1 -3A was to monitor the DS <br />aquifer in the inactive solution mining of Mine Panel 1. The well was scheduled for plug and <br />abandonment (P &A) due to cessation of mining operations in Mine Panel 1, its location up -dip <br />from the 90 -1 water supply well, and it's advanced age. <br />The P &A contractor was Red Rock Well Service (RRWS) based out of Blanding, Utah. RRWS <br />used Workover Rig No. RR -3 to P &A the well. RRWS worked in day shifts and commuted to the <br />location daily from Rifle, Colorado. Northwest Ready Mix (NW), based out of Meeker, <br />Colorado, provided all of the cement for the plugging operations. <br />Daub & Associates, Inc. (Daub), based in Grand Junction, Colorado, engineered the P &A and <br />secured the contract. A geologist from Daub was on -site during all phases of the abandonment <br />operation, provided field coordination- supervision, and quality control and confirmation of the <br />P &A activities. The Daub geologist performed the following duties: <br />• Provided QA /QC of all operations. <br />• Maintained a chronological log of daily activities. <br />• Coordinated contractor operations. <br />• Provided cost tracking and reporting. <br />Daub & Associates, Inc. Page 1 of 3 1 -3A P &A Report <br />