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_ _' _. _: _ .._.' _. .,.,-.....ae. ...... ._>•:..A_ L A_S s,_.._ — _,t 4 ...,..__,w '.......'..:..1i:.�,.'' ....m:.L_3,.rms.idcaG......_..,..._ <br /> BF Goodrich <br /> R <br /> II I I II I II I II IIII III <br /> The BFGoodrich Company /'� �` S( Vijay Rastogi 999 <br /> 325 Springside Drive "l / U Business Manager <br /> System <br /> Suite 130 ProMac' Systems <br /> 216-374-4220 <br /> Akron,Ohio 44313 <br /> October 10, 1990 <br /> Mr. Thomas Colbert <br /> Intermountain Soils, Inc. <br /> 50 S. Steel #520 <br /> Denver, Colorado 80209 <br /> Dear Tom: <br /> Attached are results from the analyses of the Lake Emma Te_st� Plot samples you <br /> sent us recently. As you can see, the data are quite favorable. Of <br /> particular note are the following conclusions: <br /> 1. The paste pH and water extraction pH from the PrOMac treated plot are <br /> higher than the control plot. <br /> 2. The net acidity is much lower (approximately 64%) in the ProMac <br /> treated plot. <br /> 3. In spite of higher (by 125%) pyritic-sulfur in the ProMac treated <br /> plot, the sulfates are only 21% of the control plot, showing control <br /> of acid formation. <br /> 4. In the water extracts, iron and aluminum are very similar but <br /> extremely low in both samples. However, the manganese content is <br /> almost 9 times higher in the control sample. <br /> 5. The lime requirement for neutralization is further confirmation of <br /> greater acidity in the control sample. <br /> We believe that the ProMac treatment is serving its purpose and the secondary <br /> effects from the control of acid and metal solubilization should be showing <br /> up in the revegetation effort. <br /> You have BFGoodrich permission to use this data in a technical presentation <br /> if you so wish. However, please also obtain clearance from Sunnyside Mine. <br /> Thank you. <br /> Sincerely, <br /> Uy� <br /> Vijay Rastogi <br /> vm <br /> cc: harry Perino <br /> Sunnyside Mine <br /> Attch. <br />