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<br />4.8.5.1 Surface Water Monitor <br />A surface water monitoring program should be designed to accomplish two goals. <br />Y First, to establish the baseline effluent parameter levels prior to mining dis[ur- <br />~l bance. By regulation, these levels are the criteria which must .be met by an opera- <br />,!! for prior to removal of control structures and release of bond. <br />~~ <br />4~ Second, baseline effluent parameter levels are necessary for comparing against oper- <br />ational water quality in order [o measure mining related impacts. <br />Only two major undisturbed drainages exist within the permit boundary. These drain- <br />ages are Flume Gulch, sample site S-1, and Pyea[[ Gulch, sample site S-3. There- <br />fore, these sites (S-1 and S-3) will be used to gather baseline Total Suspended <br />Solids (TSS) and Settleable Solids (SS) data over the next several years starting in <br />1985. The additional baseline data is necessary since existing data are thought to <br />poorly represent the full range of baseline values. For example, the operational <br />monitoring in No-Name (S-5) Gulch observed higher TSS values prior [o mining distur- <br />bance in this drainage than during baseline monitoring. Also, no baseline SS data <br />exists for any of the drainages [o be affected by mining. <br />To achieve the above goals, flow recording devices (either continuous or instantane- <br />ous) will be used along with grab samples for TSS and SS. Samples are [o be taken <br />at a sufficient frequency to give a reasonable indication of baseline flow and sedi- <br />ment load (two to three times per month during the snowmel[ runoff season). Other <br />parameters as described in List A and A-1 (Table 4.8-12) will b sampled at the fre- <br />quency specified in Table 4.8-11. (JJ <br />1 <br />1~ <br />1\000 <br />1 <br />4-239a <br />