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April 2014 20 10381640A <br />4.4 Nearby Water Supply Wells <br />An initial review of the well permits near the Boettcher Quarry was conducted in 2011 (Golder 2011). The <br />findings of this initial review are presented in Appendix F. The initial review included a search of the <br />Colorado Division of Water Resources (DWR) online database for information on local well permits. The <br />initial review resulted in permits for 76 wells from Township 8N, Range 69W, Sixth PM, Sections 4, 5, 6, <br />7, 8, 9, 10, 15, 16, 17, 18, 20, and 21. This initial review presented data gaps including well screened <br />intervals, water levels and general lithology. In an effort to obtain further information on these permitted <br />wells, the DWR's online database was revisited and each individual well permit was reviewed as part of <br />the current study. <br />The well permit review provided additional information on screened intervals and total depths. However, <br />no additional lithological or static water level data was available. The majority of the well permits in the <br />DWR database are west of the CKD disposal area. Based on the dip of the lithological units at the Site, <br />only those wells that are located to the east of the CKD disposal area A2 have the potential to be <br />screened across or immediately above the Niobrara /Codell contact. Since the screened intervals of these <br />wells do not intercept the Niobrara /Codell contact, water quality samples collected from them would not <br />be beneficial in evaluating the effect of CKD disposal area A2 on groundwater quality. <br />_mom - -_ <br />(D2--tif <br />Golder} <br />010\81640a\ 0400 \gwoharwelI installfieldrep _fnl- 30apr14 \10381640a gwcharrp [_holcim- boettcher_fnl- 28apr14- with holcim edtts.docx Associates <br />