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Page i of 2 <br />• Edward Baltzer <br />From: Dearstyne, David - Montrose, CC [David.Dearstyne@co.usdagov) <br />Sent: Wednesday, February 20, 200810:47 AM <br />To: Edward Baltzer <br />Cc: Boyd, Jim - Norwood, CO; fcompton@Nvaishenv.com: rgubka@wfcnucla.org <br />Subject: RE: New Horizon Mine <br />Hi Edward, <br />I could suggest sampling for the following items, pH, EC, texture estimate (using the ribbon or similar method), <br />soil color, effervescence (presence or absence of carbonates), estimate of % RF's (rock fragments) - sizes and <br />amount by volume, I would split any layers within this subsoil that are contrasting (Game form different <br />replacements) in any of these characteristics. If your sample indicates significant effervescence using HCL (1 N), <br />or visual observations of significant calcium carbonate (masses, threads, coats on frags) you may opt to collect a <br />sample and run a calcimeter to determine the CaC03 equivalent. This is a simple test that usually takes about 3 <br />to 5 minutes to run and requires just a couple of test items and chemicals (10% HCL), It is usually run inside, <br />This is a more comprehensive list, if you just wanted to describe essentials only, they would be in my estimation <br />texture, pH, EC if pH is above 8.4, and amount and sizes of RF's. <br />Using this information, you can men compare to the requirements for prime Farmland and to the soil <br />descriptions of the original soils found on the site (in this case the Sarx or Devinny soils). You also have the data <br />collected by Intermountain Resources to help you as a baseline for comparison. I would suggest keeping in mind <br />some of the conversations we had during our meeting on the 15th, when comparing the replaced subsoil with the <br />PF requirements. For most agricultural uses, the topsoil is much more significant than the subsoil (though in our <br />conversations you can't assume that anything replaced will suffice for subsoil requirements). Hope this helps. If <br />you have difficulties developing a list of parameters for subsoil replacement characteristics using this information, <br />please feet free to contact me and we can discuss this further. <br />Dave <br />From: Edward Baltzer [mailto:ebaltzer@walshenv,com] <br />• Sent: Monday, February 18, 2008 9:50 AM <br />To. Dearstyne, David - Montrose, CO <br />Cc, fcompton@,.vaishenv.com; rgubka@wfcnuda.org <br />Subjects New Horizon Mine <br />Dear David'. <br />We are proposing to sample the top two feet of subsoil that has been placed over the 98E (Prime Farmland) <br />mined portion of the New Horizon Mine, It will -lave approximately two feet of reclaimed topsoil placed over it. <br />Please provide an analyte list that you think is appropriate to determine if the placed suboii is appropriate for the <br />louver horizons of soil. THank you for your time. <br />Sincerely, <br />Edward M. Baltzer <br />Walsh Environmental Scientists & Engineers, LLC <br />535 Grand Avenue <br />Grand Junction, Colorado 81501-2790 <br />(970) 241-4636 <br />ebaltzer@waishenv.com <br />3/17/2008 <br />0 (Revised Nov 2008) Attachment 2.05.4(2)(d)-1-15