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3. SPRING AND SEEP MONITORING • Requirement Between April 1 and May 15 a spring and seep monitoring plan is to be implemented on the reclaimed areas. For springs having a flow greater than 75 gpm, a "full suite" list of 25 parameters are to analyzed. In addition, these springs will be sampled monthly for the field parameters pH, conductivity, temperature and estimate of flow. If no flow exceeds 75 gpm, an annual full suite analysis for the single largest spring will be completed. Mitigation involves the subsequent evaluation of each spring or seep and the subsequent determination of the need for remedial action. Response On May 6, 1987 a spring and seep survey was completed at the H-G minesite. A total of four locations were noted (RSP 1-4). On June 16, 1987 it was further determined that there were two additional sites (RSP 5, 6) which should also be included in the spring and seep monitoring. For a location of each of the sites refer to the Final • Reclamation Map, Exhibit 8. A brief description of each of the sites is as follows, as well as the field and lab analyses and a description of any mitigation that was required. RSP-1 Located approximately 300 feet southwest of what was called the "lunch trailer" area during mining, this spring originally started flowing during the spring of~ 1986. The location of the spring apparently corresponds to a switchback in one of the upper haulage roads in the mining area. The spring appears to originate from a perched zone near the surface of the spoil rather than flow from a deeper zone in the spoil backfill. The limited water flow (1 gpm) occurs during snowmelt and stops early in the summer months. During routine repairs of contour drainages, rills, etc. within the reclaimed mining area, the flow from the spring was ditched into the adjacent rip-rap drainage (ditch A1). All flow from this site is directed ultimately to HG-8. ~J -5-