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(6) PHC: The local rate of runoff of surface water will increase. <br />There is no effect demonstrated in the AHR and really no way to prove this. <br />(7) PHC: There will be a temporary increase in total suspended solids (TSS) to the <br />receiving stream. <br />The temporary increase predicted in the probable hydrologic consequences section (PHC) <br />would have occurred during mine construction, but the prediction no longer applies. The <br />effect of the sedimentation ponds on the site is to reduce TSS to levels lower than they <br />would normally be in the area during a storm event. <br />(8) PHC: The effects of subsidence in Red Wash and Slumgullion Gulch will be <br />short-lived. <br />This proved to be true in the period 1995-97 when the area was undermined, <br />(9) PHC: Refuse disposal effects on surface and groundwater will be minimal. <br />There are no data beazing on this prediction. <br />(10) PHC: The impact on groundwater quality will be minimal. <br />Water quality has not been sampled in the bedrock groundwater wells since 1995. The <br />local bedrock dewaters as the mining passes through and no effects were noted in the <br />past. Alluvial groundwater shows no impact in Qal-5. Levels of total dissolved solids <br />(TDS), chloride and magnesium have decreased since 1986 and nearly every other <br />analyte has decreased in concentration since 1991. <br />Additional Comments: <br />You may want to consider some additional monitoring in the program as mining <br />advances. New monitoring would not necessarily be related to the newly added permit <br />azea, but to the predictions in the PHC. Most of the existing monitoring points will have <br />been mined through before long. It has been observed throughout the history of the <br />monitoring program that the bedrock strata are dewatered as mining proceed past the <br />monitoring well. While that observation is almost intuitive, a complete record can be <br />maintained if an additional monitoring site were placed further down-dip (to the <br />northeast) of the current panels to replace sites 29-4 and 30-8 as they are mined through. <br />Groundwater Points of Compliance: <br />The geologic and hydrologic situation at the Deserado Mine was reviewed with regard to <br />determining one or more appropriate "groundwater points of compliance." The Deserado <br />Mine workings lie on the south limb of a shallow syncline that plunges southeast toward <br />