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i <br />Well 61 ie located is the southwest Dostion of the permit area. Zt disDlays as • <br />increaaiag TDS tzend. We11 62 ie located above NPDE9 004. It dieDlaye an <br />increasing TDS trend. <br />Comparison of Grovad Water Quality to Water Uea Standards. SCC has compiled a <br />list of ground water use atandarda for agricultural uaea (Table 5). This list <br />ie composed mostly of Colorado Department o£ Health ground water standards <br />(CDOH, Reg. d1, 1999) ae o£ Marsh 1999 (footnotes A and H, or ao footnote), <br />although other agency standards have been used if the CDOH has ao agricultural <br />standard for a Darticular parameter (all other footaotea). <br />Table 6 Drovidea a comparleon of ground mater quality to agricultural etaadarda. <br />This Pnradox databnee generated table dose not include the unite of <br />concentration (mg/1 or ug/11 for each parameter. The unite used for each <br />parameter are the same as those listed oa the etaadarda table (Table 5) and are <br />also the same as those used in the water quality reports. The frequency column <br />on Table 6 indicates the number of exceedences out of the total number of <br />samples (i.e., 1/2 indicates one exceedeaca out of two samples). Haloes is a • <br />summery of atandarde that were exceeded. Given in Darentheeie ie the source and <br />use of each standard. <br />Parameter Number of walla <br />DH (CDOH, irrigation) 2 <br />fluoride (CDOH, irrigation) 3 <br />iron (CDOH, lrrigetioa) 3 <br />manganese (CDOH, irrigation) 1d <br />mercury (CDOH, livestock) 1 <br />dleeolved solids (USEPA, irrigation) 14 <br />dieaolved eolida (Wyoming, livestock) 2 <br />sulfate (California, irrigation) 16 <br />Ia addition, a total of five eamDles (from three walla) had cadmium values that <br />ware less than as elevated detection limit (20 ug/1 ve. a normal detection limit <br />of 3 ug/1) which was higher than the CDOH standard of 10 ug/1. Likewise, the <br />name five samples had lead values that were less than an elevated detection • <br />limit (200 ug/1 va. a normal detection limit of 20 ug11) which was higher than <br />8 <br />