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35 <br /> Note: All tests used 100 g soil, 50 ml. total aqueous solution <br /> 30 <br /> o - <br /> 25 <br /> w <br /> 0 20 <br /> m <br /> or <br /> o <br /> J 15 <br /> i- - - - - - - - - - - - - <br /> - - - - - - - - - - - - - - - - - - - - - - - - - <br /> w <br /> A <br /> m <br /> 0 10 <br /> J <br /> 5 <br /> 0 <br /> 0 2 4 6 8 10 12 14 16 18 20 22 24 <br /> Time, hours <br /> —� 2%H2O2 only --o- 5%H2O2 only - - A - - 2% H2O2+ac1d - - A - 5%H2O2+acid <br /> t2%H2O2+FeEDTA --El-- 5%H2O2+FeEDTA f 2%H2O2+Fe2+ —e - 5%H2O2+Fe2+ <br /> Figure 1. Rate of OfUGas Formation <br /> PRIMA Environmental, Inc, 16 Eval of Peroxide <br /> February 8, 2007 Cambria---- G Street, Davis <br />