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<br />Project: Cripple Creek Hydrogeochemistry
<br />Task: Neutralization of Pyrite Oxidation Products
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<br />Date: 4/8/2008
<br />Page 1-4
<br />c. Store the sample unpreserved at 40C under nitrogen in an airtight opaque glass bottle until use.
<br />4. South Cresson Sample: _
<br />F-
<br />a. Combine 800 ml from each of two consecutive weekly flushes from the coarse South Cresson HCT, 400 ml from each of two
<br /> consecutive weekly flushes from the Standard South Cresson HCT, and 400 ml from each of two consecutive weekly flushes
<br /> from the fine South Cresson HCT, for a total sample size of 3200 ml. In the event that one or more HCTs produce less than
<br /> the required volume, attempt to make up the sample volume with liquor from the excess of the other flush volumes.
<br />b. Ta ke a 250 ml aliquot of the sample (leaving 2,950 ml-) and test for pH, conductivity, ORP, sulfate, acidity, alkalinity, TDS, Cl,
<br /> N03-N, HCO3, Al, Sb, As, Ba, Be, Bi, B, Cd, Ca, Cr, Co, Cu, Fe, Pb, Li, Mg, Mn, Hg, Mo, Ni, P04, K, Se, SiO2,
<br /> Ag, Na, Sr, Te, TI, Th, Sn, Ti, U, V, Zn, Zr.
<br />c. Store the sample unpreserved at 40C under nitrogen in an airtight opaque glass bottle until use.
<br />Natural calcite reagent
<br />Anatural calcite neutralizing material shall be prepared as follows:
<br />1. Combine 1 kg of each of the Cresson Pipe and the Squaw Gulch (high carbonate) samples, both crushed to #20 0 mesh.
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<br />2. Perform analyses specified below
<br />a. NAG test.
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<br />_c. ABA characteristic
<br />d. Leco Sulfur and Carbon.
<br />Laboratory calcite reagent
<br />A laboratory calcite reagent shall be procured that is minimum 99.5% pure ca lcium carbonate.
<br />Calcium hydroxide_reagent
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<br />A_ 0.05 N
<br />calcium hydroxide reagent shall be prepared by dissolving laboratory grade hydrated lime in distil led water.
<br />The resulting reagent shall be sediment-free. The resulting reagent shall be analyzed for calcium and hydroxide alkalinity.
<br />Sodium hydroxide reagent
<br />A 0.1 N sodium hydroxide reagent shall be prepared or procured. The reagent shall be analyzed for sodium and hydroxide alkalinity.
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<br />Test 1: Neutralization by Natural Calcit_e_
<br />Each HCT test liquor shall be subjected to the following test:
<br />1. Take a 500 gram sample of the natural calcite reagent and place it in an inert tumbler.
<br />2. Add 500 mL of the HCT test liquor (leaving 2,450 mL).
<br />3. Roll the sample and liquor for 24 hours.
<br />4. Decant liquid from sample container and filter using a 0.45 micron glass filter.
<br />5. Anal yze the_resulting _liquid for pH, conductivity, ORP, sulfate, acidity, alkalinity, TDS, Cl, N03-N, HCO3, Al, Sb, As, Ba, Be, Bi, B,
<br /> Cd, Ca, Cr, Co, Cu, Fe, Pb, Li, Mg, Mn, Hg, Mo, Ni, P04, K, Se, SiO2, Ag, Na, Sr, Te, TI, Th, Sn, Ti, U, V, Zn, Zr.
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<br />Adrian Brown Consultants, Inc.
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