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Attachment B, Technical Revision to the May Day Mine Permit, September 12, 2009. <br />41 LW, <br />D 5 <br />r-vironmental Services <br />a division of Jericho industries <br />Environmental chemistry <br />Site sampling A Testing <br />Site Assessments <br />Strategic Planning <br />soil d Geochemistry r <br />safely +s,essmena •.. <br />December 1b, 2006 <br />i <br />I• <br />John Ferguson <br />Wildcat Mining Corp. 1 <br />Po Box 2030 <br />Durango, CO 813024030 <br />1 <br />RE: Identify hazards related to proposed chemicals at your site <br />Dear John, <br />As per your request on behalf of Wildcat Mining l have reviewed the <br />MSDS data and proposed mining process that use the chemicals identified <br />on page two of the November 21, 2006 letter from the State of Colorado. <br />My comments and the type of chemical are as follows: <br />Sodium Carbonate [soda ash). This chemical is alkali and in solution can <br />cause skin irritation and can be harmful to eyes and should not be ingested. <br />This material in large amounts could harm aquatic life. The extreme <br />solubility of this material will allow rapid dispersion and Bence low likelihood <br />of nigh concentrations moving as a pulse down stream in the event that <br />material is released into an aquatic environ. Bulk material should be <br />stored dry on a pallet and should not be in contact with the ground. Protect <br />bulk sacks from moisture and store opened bags in a closed container to <br />avoid spillage. In the event of spillage cleah up the material and recycle <br />into your process- I <br />Contr:ct Research Sodium Silicate [water glass). This chemical is alkali <br />cause mild to moderate skin irritation and is harmful to i <br />be ingested. This material in large amotjnts could i <br />_ dispersed quickly into water. Bulk material should be s <br />Wetland Remedietioa with a berm or in over barrels in the unlikely event that <br />Spillage is best mixed with sand and re,, clad i to <br />Reclamatloo Serrices <br />9 S u t t l a St. <br />b• Box 4124 <br />uranaa. CO 81302 <br />• 8 0 0. 5$ 3. 6 2 6 6 <br />Sx 970.247.7891 <br />sen virooa fTOn tier. not <br />y n yc <br />must also be mopped since the area can remain slick a <br />not evaporate. This material will react with water to prod <br />and an alkaline environ that can harm aquatic'life in fart <br />the material is very dense spills will sink grid slowly b <br />moving water. As with any soluble alkali neutrali% <br />complete. a <br />Dowfax f surfactant). This chemical is alkali and in sc <br />irritation and can be harmful to eyes and should nl <br />material in large amounts could harm aquatic life. Thi <br />this material will allow rapid dispersion and hence to, <br />concentrations moving as a pulse down 'stream in the <br />released into an aquatic enviroh. <br />nd in solution can <br />es and should not <br />irm aquatic life if <br />red dry in an area <br />drum would leak. <br />r process. Spills <br />d the material will <br />:e dissolved silica <br />amounts. Since <br />washed away in <br />on is rapid and <br />Ition can cause skin <br />be ingested. This <br />extreme solubility of <br />likelihood of high <br />vent that material is <br />we have moved, our new address is 463 Tumor Drive 9104C ... our laCsl phone is still 247-0132 <br />2 of 35