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Estimated Zinc Loading from the American Tunnel Plugging <br />Flow through wettings @ 200 gpm <br />Flow wound +w rldrris <br />Total loading from Scenario <br />Percent Increase in Loading to Cement Creek <br />Scenario No. 6.: <br />Flow from American Tunnel <br />Flow through workings (A 380 gpm <br />Flow around workings <br />Total loading from Scenario <br />Percent Increase in loading to Cement Creek <br />0.29 8.96 21.72 <br />1.05 5 43.79 <br />252.65 <br />FlOWIMGDI Cone. /ma?I g, T. Loadllhutyat <br />0.935 24 187.15 <br />0.5 22 -5 93.83 <br />0.64 5 35 -03 <br />316.00 <br />311 <br />393 <br />374 <br />494 <br />5048 <br />".J -,. QC' 1 ..11 Iu- .ui' - .. i1 ••, !i.'_ru're 1v- , 2 •• <br />6078 <br />499 <br />562 <br />Please note the Mowing assumptions were used to develop the loading <br />1. The "Animas load and the 'Animas Concentration' were based on a model developed by the Division to determine the Impact that reductions in loading would have on the Animas. <br />2. Under Scenario no 1 the flow and concentration for the American Tunnel discharge Is based on discharge monitoring report data. <br />3. Loading for Cement Creek is the sum of the loading from the American Tunnel area as calculated end a base loading of 58 lb/day with out the American Tunnel discharge. <br />4. For all scenarios, except no. 5, it is assumed that the total future Row must equal the present flow These scenarios do not include any flow contribution from the Terry Tinnet. <br />Scenario no 5 inct des both a flow and loading contribution horn the Terry Tunnel. <br />5. The values foi "Flow through the wr rldngs" were obtained from. the Simon Hydrosearch reports from F 'hruary 1992 and March t 993. The value for 'flow around the wnriungs is 2.3 minus <br />the "flows trough tie workings" and the "flow from the American Tunnel' <br />6. The 8.98 mg/1 the 5 mgll and the 22.5 mgt values were supplied by Sunnyside. Inclusion of this number does not imply acceptance of this value. In addition the Tony Tunnel flow and <br />concentration were obtained verbally horn Sunnyside <br />7. A low flow of 11 cfrs was used in calculation of the Cement Creek concentration. This value was deterrnbed by the Division. <br />6. The concentration fur the flow from the American Tunnel under scenarios 3d, 3e and 3f is an average of the concentration data for faults 1, 2 and 3 as found in the February 1992 report . <br />ft was assumed hat these lav s would make up the load of zinc if a plug was put In at the property line Under scenario 6 the zinc concentration is back calculated <br />assuming a combined concentration of 151 and a conoentratlon up gradient of the plug of 8.98 <br />9. The concentration for the 'flow from the American Tunnel" of 151 is the average of the untreated American Tunnel data as listed In the February 1992 Simon Hydro-search report. <br />10. These calculations are for zinc Similar calculations would need to be done for other metals. <br />926 <br />� L.IIa i'•_L'.r <br />1042 <br />These calculations included in this document are for the most part, based on data and assumptions provided by Sunnyside acrid Corp. and Echo Bay <br />They are provided for discussion purposes only and should not be construed as an acceptance or admission by She Division of the validity of the D <br />data and asusnptons on which they are based. <br />• <br />r co <br />U3 <br />cn <br />m <br />