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Spoils. Three wells monitor the spoils above HPDHS 007. Nall ]5, the uDpar well, does • not display n distinct TDS trend. Nell ]6, the middle well, di splayed en increasing TDS trend until 1990/1991, but Lae recently decreased. Nell 17, the bottom roll, displays an iacraaeinq TD9 trend. Nall 61 ie located Sa the eouthraet portion of the permit area. it displays an increasing TDS trend. Nall 6] ie located above NPD85 004. It displays en Sneraaeing TDS trend. ComDarlaoa of Ground Nester Dunlity [o Nester Dee Standards. SCC has comDilad lints of standards for irrigation ITebla 5) sad livestock (Table 6). These lists era compoead mostly of Colorado DaDartment of Henl tb (CDOH) standards, nl[hough other agency stendarda heva bean used if they are more stringent or 1f the CDDH hee ao atandnrd for a Darticul nr parameter. Sae SCC'9 Yoaet Hines Permit ADDlication, Tables 7•]1 and 7-]3, for a more detailed axDlsnstioa of these standards. Table 7 provides n comparison of ground rater quality to irrigation etendarda. Stendarde that rare exceeded are pH at nix wells, fluoride nt [brae wells, iron at four walla, msnganeea at eleven velln, selenium at two wel le, TDS at fourteen calls, and gulf eta at • eighteen calla. TeDle S provides a eomparieoa of ground rater quality livestock etandaide. Stmdarde that ware exceeded era pH at six cell e, fluoride at three cells, and sulfate at tro calls. Piaally, water quality eaalysea performed oa aamDlea obtained at the Seneca II production well (STCS) for thin year were compared against both primary and aecoadary drinking water standards developed for ground water by the CDDH (CDOH, 1986). Sulfates (secondary etsndard, 250 mg/11 were higher than the CDDH standard: 454 mq/1, November 15, 1995; end 370 mg/1, Jvae 19, 1996. Nell STCS Las historically exhibited higher sulfate coacantretioae than the aecoadary drinking water standard for this Decameter. However, bottled water i^ consumed et Seneca II. Ground Natar Duality Summary. TDS values at nine wells diaDlayed increasing TDS trends. TD5 trends at all other wells were either level or decreasing. Agricultural ground water etaadarda foz DH, fluoride, iron, mmgaaese, selenium, sulfate, and TD5 were exceeded at certain monitoring walla. Ia the area eurroundlag Seneca Ii, ground rster ie not being live d f i i ti t k diacusaioa ur oaea The bov t i rovided is pumpe ar rr ga on or s oc p . xs er nq p a e p