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Site SW-S2W-SG-17. The site exists on Hubberson Gulch at the Pond 017 site. It was first sampled in <br />August, 1997. Samples at this site display aCaMg-HCO,SO4 type water with an average TDS value of <br />593 mg/I (range 530-6501. <br />Site SW-S2W-SG16. This site exists at the Pond 016 site. It is situated on a tributary to Hubberson <br />Gulch (a.k.a., 016 Gulchl that enters Hubberson Gulch below the Pond 017 site. It was first sampled <br />in August, 1997. Samples at this site display a MgCa-S04 HCO~ type water with an average TDS <br />valve of 803 mg/I (range 740-9301. <br />Spring 5-49. This is a spring developed with a 4 inch PVC pipe that flows into a stock tank. It is <br />located immediately above the Pond 016 site and was first sampled in August, 1997. Samples at this <br />site display aCaMg-HCO3 type water with an average TDS value of 657 mg/I (range 650-6701. <br />Spring S-7. This spring la.k.a., the Joshua Springs) serves as the water supply for the homestead <br />located in Section 21 along Hubberson Gulch. Samples from this springs display aCaMg-HCO~ S0. <br />type water with an average TDS value of 768 mg/I (range 704-8361. <br />SW-S2W-SG7. This site exists on Hubberson Gulch downstream of all of the previously mentioned <br />surface water sites, but upstream of the confluence of the Pond 006 discharges from the middle pit <br />area. It was first sampled in April, 1987. In 1997, it displayed aCaMg-HC03 S0, type water with an <br />. average TDS value of 617 mg/1 1470-7101. <br />Summary of Same Day Hubberson Gulch Measurements. Table 7-49 displays TDS and flow values <br />measured on the same days on Hubberson Gulch. This table demonstrates that both TDS and flow <br />values increase es one proceeds downstream. <br />SE•S2W-CG1. This site exists about 1500 feet downstream of the Pond 015 site Ino road existed <br />during the baseline study all the way up to the proposed pond locationl. It is situatetl on a tributary to <br />Sage Creek la.k.a., 015 Gulch). This site was initially monitored from January, 1980 to May, 1986. <br />Monitoring was re-established in July, 1997. Samples at this site display a CeMg-HCO~SO, type water <br />with an average TDS value of 423 mg/I (range 370-4601. <br />Surface Water Quality Suitability. SCC has compiled lists of standards for irrigation antl livestock. <br />These lists are composed mostly of CDPHE standards, although other agency standards been used if <br />they are more stringent or if the CDOH has no standard for a particular parameter. See SCC's Yoast <br />Mine Permit Application, Tables 7-21 and 7-23, for a more detailed explanation of these standards. <br />• <br />151 Revised 7/98 <br />