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Final Technical Report, 2014 Monitoring Well Rehabilitation Program Bowie Mine 5 <br />2.1 Well2010 -1SS <br />The Sterling workover rig was moved to monitoring well 2010 -1SS (B- Sandstone) on July 22, <br />2014 and the well was inspected via downhole camera on July 23, 2014. The camera was <br />dropped downhole using the Sterling work -over drill rig and bottomed out at a depth of 1,120 <br />feet at the crossover between the 4 -inch diameter fiberglass casing and 1.5 -inch diameter <br />stainless steel screened interval. The video of the well showed the fiberglass casing to be intact <br />and in good condition. The camera was unable to video the screen, due to the fact that the <br />camera diameter was 1.75 -inch diameter, too large to fit inside the screen interval. A tag line <br />was then dropped to the bottom of the well and confirmed a total depth of 1,040 feet, with a 20- <br />foot screened interval from 1,120 feet and 1,140 feet. Static water level (SWL) was measured at <br />depth 1,092.6 feet below top of casing (btoc). Prior to initiating the rehab program, the pH <br />measurements of the water in this well were over 12.0 s.u. The well completion diagram for this <br />well is presented in Appendix A. <br />From July 24 thru July 30, 2014 the well was cleaned using a water jetting tool attached to a f- <br />inch diameter tremie pipe. Excess water was removed from the hole using airlifting and bailing <br />techniques. Water quality was determined using an Oakton water quality multi -meter on <br />samples derived from the well during bailing. On July 30, 2014, the average pH of the water <br />was 10.4 s.u., the average conductivity was 382 µmhos /cm, and the temperature was about 27.4° <br />C. <br />On July 30 after a new Sullair compressor was acquired to facilitate better airlifting, an <br />unfortunate error was made. After airlifting, one of the air hoses used to connect the compressor <br />to the pipe swivel was found to be contaminated with cement that had not been cleaned from the <br />hose after a previous use. It was determined that cement dust and particles had inadvertently <br />been introduced to the well. RACS spent all day July 31, 2014 cleaning, jetting and surging the <br />bore to attempt to clean the contaminants from the well. <br />From August 6 to 7, 2014 the well was jetted and airlifted to clean and develop the well. Water <br />quality was again tested on August 7, 2014. The average pH of the water at that time was 9.75 <br />s.u., the average conductivity was 277 µmhos /cm, and the average temperature was 27.3° C, <br />which are considered within an acceptable range field water quality values for observed <br />groundwater in the Bowie area and work on this well was deemed successful. A water quality <br />sample will be collected for laboratory analysis in October 2014 using a stainless steel point <br />source bailer. Laboratory water quality data will be summarized in a subsequent report. <br />November 2014 HydroGeo, Inc. <br />