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PRIMA Environm�,al, Inc. eprice/3 of 6 <br /> Z September 27,2007 <br /> Proposal-Eval of RegenOx <br /> for this task only, in order to confirm that concentrations are as expected before <br /> proceeding with subsequent testing. <br /> Task 3. COC Removal <br /> Batch tests will be conducted to evaluate contaminant removal and estimate the amount of <br /> RegenOx required. Four replicates containing 200 g soil and 1 L groundwater will be <br /> prepared. After mixing for 1 hour, one replicate will be destructively sampled and the <br /> aqueous phases analyzed for COCs (per Task 1). Soil will be analyzed for DRO. (Other <br /> COCs will not be analyzed in soil because of the difficulty of separating soil and water <br /> without significant losses due to volatilization.) Of the remaining replicates, one will <br /> receive a low dose of RegenOx, one a high dose, and the third will receive no treatment. <br /> The RegenOx-treated bottles will be connected to Tedlar bags to collect off-gases. <br /> Approximately once per day, the bottles will be swirled to mix. After 14 days, one <br /> replicate from each series will be destructively sampled. Off-gases will be analyzed for all <br /> CDCs except DRO. Water will be analyzed for all CDCs. Soil will be analyzed for DRO. <br /> The COC Removal tests are summarized in Table 1. <br /> Table 1. Reaction Conditions for RegenOx Tests. <br /> Test # Estimated Initial Dose, g/L Est. Sampling <br /> Replicates Time, Days <br /> RegenOx-Part A RegenOx Part B <br /> Time 0 1 0 0 0 <br /> Control 1 _0 0 I4 <br /> RO-Low 1 5 5 14 <br /> RO-Hi h 1 25 25 14 <br /> Task 3. Effect of RegenOx on Secondary Water Quality <br /> To assess the affect of RegenOx on secondary water quality,the aqueous phases from the <br /> samples in Task 2 will be analyzed for <br /> - Bromate and bromide-5 day TAT <br /> - DO <br /> - Cr(VI) <br /> - Metals(CAM-17+iron) <br /> - ORP <br /> - pH <br /> Bromate will be analyzed using a 5-day TAT so that attenuation tests, if needed, can be <br /> promptly started. Tests to assess Cr(VI) and bromate attenuation, if needed, are discussed <br /> in Task 4. <br />