Laserfiche WebLink
Crctober 2000 -31- 003-2191 <br />• depth to water, screened intervals, yields and aquifers) is presented in Appendix 4. <br />Most of the wells aze located to the west and south of the site. Well depths generally <br />range from 61 to 615 feet below the ground surface. According to the State Engineer's <br />records, many of these wells aze completed in the Denver aquifer. There are four wells <br />completed to depths exceeding 1000 feet and aze indicated as being completed in the <br />Arapahoe or Lazamie-Fox Hills aquifer. Most of the well yields range between 5 and <br />15 gallons per minute (gpm), but are as high as 350 gpm in a welt completed to a depth <br />of 1,225 feet below the ground surface. Higher yielding wells aze either shallow (less <br />than 100 feet) or relatively deep (greater than 1000 feet). Based on their locations, the <br />shallow wells aze probably completed in an alluvial aquifer associated with Plum Cteek. <br />It is highly unlikely that Sedalia Recycling and Depository operation will impact <br />groundwater wells located within one mile of the site. The shallow groundwater <br />beneath the property is present in lenticulaz sandstone units of the Dawson azkose which <br />yield little water and are not laterally extensive. Low yields were observed in the on- <br />site monitoring wells, completed in the sandstones, during purging activities (see field <br />sheets in Appendix 5). In addition, the sandstones aze sepazated by relatively <br />impermeable claystone sequences which restricts the vertical movement of the <br />groundwater. According to Robson (1987) vertical components of groundwater flow <br />aze small in comparison to lateral components. Thus, there is little or no duect <br />hydraulic communication expected between the uppermost groundwater beneath the site <br />and the sequences in which the surrounding wells aze completed. <br />3.2.2(D) Hydrologic Properties of the Perched Zones and Uppermost Aquifer, <br />Including Flow Directions, Flow Rates, Porosity, Coefficient of Storage, <br />Permeability, and Potenriometric Surface <br />Hydraulic conductivity was estimated for the B Sand beneath the site based on <br />drawdown and pumping rate data collected from the wells during purging for sample <br />collection. These data aze attached in Appendix 5 and were analyzed using the Theis <br />method (Theis, 1935) and the Aquifer~'°'Z softwaze package. This analysis estimates <br />UON1191lt1915edYi~Pmn~t1000 doc Sedalia Recycling Center and Depository <br />