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�k <br /> 2.5 Soil Reductant Demand (SRD) <br /> i" Each test in Table 2 (except the two Controls) was repeated For each test, a series of <br /> vials was prepared such that the total volume was 1/50th of that in Table 2 In tests using <br />' soil, 15 g of soil was used, giving a soil to liquid ratio of 1 2 The vials were mixed <br /> intermittently by hand Periodically, one vial from each series was destructively sampled <br /> and an effort was made to analyze for reductant In the case of Fe(II), ferrous iron was <br /> measured using a Hach spectrophotometer and appropriate reagents In the case of <br /> Cascade°, an effort was made to measure absorbance, but this was unsuccessful due to <br /> rapid oxidation of Cascade°, which formed precipitates that interfered with the analysis <br />' Qualitative information was obtained and is discussed in Section 3 0 <br /> i� <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> i <br />�1 <br />�) PRIMA Environmental 6 Eval of Reductants <br /> January 19,2005 ATC-Diamond Walnut <br />