REP29633 - Laserfiche WebLink

Home Browse Search

' fe5n«ry 200! Hay1m Gdd~ Te,ncn~ Irc ' 2000 A soon/ NXbdody R¢wt ~ Pade S HGTI has compiled a list of water quality standards for livestock This list is composed primarily of Colorado Department of Public Health and Environment (CDPHE) standards, although other agency standards were used if they were more stringent or if CDPHE has no standard for a particular ' constituent. Table 4, Carpmison t~2000 Srrrfa¢ Water Araluy to Li~tcde Srarrlmris, provides a list of the livestock standazds along with a comparison of those standards to 2000 surface water quality data. Units of concentration are as listed in Table 4. Laboratory analytical reports generally report constituent concentrations as mg/1. The HGSD3 sample from June had a total dissolved solid (TDS) ' concentration of 3,370 mg/1, which exceeds the CDPHE livestock standard of 2,500 mg/l. While the TDS value from the HGSD3 sample is greater than the criterion, rt is within the previously repotted range. In addition, numerous hstoric samples from both HGSD1 and HGSD3 have been greater than ' the TDS criterion. 3.3 GROUNDWATER DATA ' .Groundwater da[a for 2000 is presented in Appendix D, Crruarfreater Qraluy Data. Presently, HGTI is only monitoring alluvial groundwater in monitoring well HGDAL3. In 1993, HGTI installed ' HGDAL3 as a new downdip alluvial monitoring well in response to Colorado Division of Minerals and Geology (CDMG) concerns that the two existing alluvial wells, HGDALI and HGDAL2, may have been partially completed in the Lewis Shale. Groundwater quahry data was collected from monitoring wells HGDALl and HGDAL2 between 1987 and 1995. Groundwater monitoring ceased ' for HGDALl and HGDAL2 in 1995. The location of the groundwater motti[oring wells ate shown of Figure 1, Morctonng Site Lomtia: Map. HGTI reported in the existing, valid Permit (revision date October 1997) that chemistry information obtained in HGDAI3 u similar to the historic chemistry ' depicted by monitoring wells HGDALl and HGDAL2. A comparison of 2000 groundwater quality data from monitoring well HGDAL3 against the historic ' data indicates that water quality parameters were within the range of historic values reported at HGDALI and HGDAL2. Hutonc water quality data for HGDALl and HGDAL2 are also presented in Appendix D. The manganese value measured in monitoring well HGDAL3 in Jtme, 5.26 mg/], was elevated when compared against monitoring well HGDALl and HGDAL2 data. However, the ' concentration was within previously observed values at HGDAL3. lJ 1 1 Moagnay Wotsm' P.Q Bas 774018 ' Srenrbou Spmgr, Ct~ 80477 `(970J 8796260 w~m~mn+MeM~ranex~.yna l/OI,M1,