2005-02-23_REVISION - M1977208 - Laserfiche WebLink

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Appendix A Determination of Artesian Conditions at the Hall Well On February 11, 2005, Mr. Eric Hodek (Cemex) and Mr. Richazd Henry (iJRS), visited the-property of-Mr:-Dick Hall to determine if artesian conditions currently-exist at the well (Hall well) on Mr. Hall's property. According to the Water Well Permit Application (Attachment A) filed with the Colorado Division of Water Resources, the Hall well was drilled to a depth of 880 feet below grade and completed as a well on December 29, 1998. The well was screened between 820 and 880 feet in the Dakota Sandstone. At the time the well was completed, the static Zvas i'egotrted-a o e ow gra e ac enfA~. On Apri17, 1999, Richazd Henry (while employed with Grant Environmental, Inc.) sampled the Hall well and noted in a report (Report on Storage of Cement Kiln Dust, Southdown Inc.,.. Lyons Ptant, June 21, 1999) submitted to the Colorado Division of Mines and Geology (DMG) as part of TR-02 that the "well is artesian and-free-flowing at the well head." At the time of sampling, the pump installed in the well was not operating. According to ~the:records of John's Well Service of Lyons, Colorado (Attachment B) obtained by Mr. Hodek on February 17, 2005, the initial well pump was installed on January 29, 1999 at a depth of 805 feet below grade. Subsequently, the initial pump failed and a new pump was installed on August 13, 2003 at a depth of 280 feet below grade. During their visit on Februazy 11, 2005, Mr. Hodek and Mr. Henry removed the cover on the Hall well (Figure 1, Attachment C) and attempted to measure the groundwater level. Water was found in the well at a depth of 2.6 feet from the top of the well casing protector. The well protector was approximately 2.5 feet in height. Further inspection, revealed that the measured water level was not from the well as the well is sealed at a depth of approximately 3 feet. However, the water accumulated in the casing protector may represent groundwater seepage through the seal because of artesian pressure, but did not provide sufficient evidence of an artesian condition at the well. An inspection of the shed where the water is routed from the well for treatment, revealed that the water samples previously collected by Mr. Hodek were not raw water, but water that had been; chlorinated. These samples were taken from the only available spigot on the piping from the well. Mr. Henry recommended that Mr. Hodek contact the local well service that had installed the pump and treatment system to install a raw water sampling spigot. Mr. Henry further recommended that once the raw water spigot was installed, that Mr. Hodek and the well technician turn off the pump and see if the water flowed freely from the well. On Februazy 16, 2005, Mr. Hodek and Mr. Matt Larson (John's Well Service of Lyons, Colorado) visited the Hall well. Mr. Larson confirmed that the previously collected A-1