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Highway trucks will deliver the chemicals to the site, to a compacted pad of 20 feet width x 20 feet <br />length. From this pad, they will be taken underground to the mill storage area by small Bobcat or <br />forklift. Approximately 2000 lbs or less of each chemical will be stored on site in factory containers <br />inside the mill tunnel, as shown on Map C -2. The mill area has two tunnels, one connecting to the <br />Revenue tunnel and the other daylighting on the surface as the Mill Portal. The entire Mill Tunnel <br />that runs from the Mill Portal to the sump will be lined with 4" of concrete floor and the entire sides <br />will be shotcreted. The low point sump will have a concrete lining of minimum 4 inch thickness. If <br />any liquid spills occur, they will enter this sump and will be removed by manual methods or pumps <br />into small portable tanks which will then be disposed of offsite at an approved waste facility. <br />Liquids cannot enter the groundwater from the tunnel since the floor of the tunnels is solid andesite <br />(fine grained granite), which is nearly impermeable. The liquids will travel downhill to the lined <br />sump. Also, there is no chance that chemicals stored could spill out of the mill tunnel to the surface <br />given the 1% grade over the distance of 415 feet from the Mill Portal to the sump. The drift from <br />the mill area to the Revenue drift has even more capacity. <br />The sump will be 10 feet wide x 15 feet long and 2.7 feet deep after the lining is placed. This sump <br />will be excavated out of the andesite host rock by blasting. <br />The MSDS sheets for each chemical are enclosed in Appendix 5. Normally, the SPCC Plan covers <br />only petroleum based chemicals but the SPCC Plan for this site will have inspection and reporting <br />requirements for the diesel fuel tanks as well as the chemicals stored underground for the mill <br />operation. <br />Revenue Mine August 2012 T - <br />