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cmlo a! <br /> gk TcclrKuslriza Page 6 <br /> Dual Phase Extraction Pilot Test Report <br /> Project No 723 2 <br /> November 12,2004 <br /> ' 4,0 PILOT TEST <br /> ' In the following sections GTI will discuss the execution of the pilot test that was performed <br /> by APT and GTI staff from March 19 - July 8, 2004 APT's technical report on the ISCO <br /> pilot test is included as Appendix D <br />' The first infection event took place on March 19, 2004 Wells GP-1, GP-2, GP-3 and MW-9 <br /> were purged and sampled as in section 3 2 above to establish pre-infection baseline <br />' conditions Following the initial groundwater sampling procedure conducted as in Section <br /> 3 2 above, well MW-9 was fitted with a sealed cap through which a flexible polypropylene <br /> hose was threaded A solution of 1 gallon 35010 hydrogen peroxide (11202) and 4 gallons of <br />' distilled water was mixed in a 5-gallon poly container The solution was pumped into well <br /> MW-9 at a rate of 1 gallon per minute (gpm) and a pressure of 10 pounds per square inch <br />' (psi) After the H2O2 solution was infected, gaseous oxygen was introduced into the tubing at <br /> 10 psi to force the solution out of the well and into the formation After each injection <br /> episode was completed, approximately 2 gallons of de-ionized water wAs introduced into well <br />' MW-9 to rinse the well and preclude chemical degradation of the PVC well by oxidants <br /> This procedure was repeated bi-weekly for eight consecutive groundwater sampling/injection <br /> events - For the last two events, gaseous ozone was injected prior to hydrogen peroxide <br /> solution In these cases the ozone was mjected for a two-hour period at a rate of 15 standard <br /> liters per minute (slm) in a ratio of 8 wt percent in oxygen Following ozone infection, the <br />' well was purged with gaseous oxygen at 25 slur and allowed to reach equilibrium for a one- <br /> hour period Following this period, the groundwater in MW-9 was sampled again and then <br /> the hydrogen peroxide injection/oxygen purging was repeated as with previous events The <br />' test schedule is outlined in the following table <br /> Well MW-9 Sam lin Injection Schedule <br />' Oxygen Ozone <br /> Date Sample Hydrogen Peroxide H2O2) 02 03 <br /> groundwater Solution Injection Pure Purge <br />' 03/19/04 X X X <br /> 04/02/04 X X 2 X 2 <br />' 04/16/04 X X 2 X 2 <br /> 04/28/04 X X X <br /> 05/14/04 X X 2 X 2 <br />' 05/26/04 X X 2 X 2 <br /> 9 20 AM 06/11/04 X X <br /> 1 40 PM 06/11/04 X X 2 X 2 <br /> 9 20 AM 1 06/25/04 1 X X <br /> 1 05 PM06/25/04 X X 2 X 2 <br /> 07/08/04 X <br /> (2) = process repeated twice <br /> �a <br />