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JM Equipment Chemical Oxidation Test Report ' 2.0 PILOT TESTING ACTIVITIES 2.1 Injection Equipment The test consisted of injecting peroxide into the well MW-9 biweekly, over a 15-week period Well injections were performed using a hydrogen peroxide pumping system to inject the ' hydrogen peroxide in to the well Prior to injection, the hydrogen peroxide was mixed with distilled water in a 5-gallon polyethylene tank to dilute the peroxide to 7 75% The hydrogen peroxide was injected into the well using a chemically compatible pump through ' 3/8" polypropylene tubing The pump's capacity is one gallon per minute (gpm) at maximum pressure of 10 pounds per square inch gauge (psig) The small pump was used to minimize the rate at which the hydrogen peroxide can be applied and the pressure that could be put on the ' well The well was fitted with a well seal and a 1" line that allowed the tubing to be passed into the well A bore through tubing fitting is used at the top of the well so that the tubing can be inserted to different depths for injection ' Following peroxide injection, the well was pulsed with oxygen provided from a standard oxygen cylinder and oxygen gas pressure regulator The well was pressurized to push the hydrogen peroxide out of the well and into the subsurface The injection was monitored by the pressure build up on the well and was limited to 10 psig The oxygen pulsing was done using the same tubing that was used for the hydrogen peroxide injection This also allowed clearing of the hydrogen peroxide out of the line The ozone injection was carried out using an 7 5 pound/day ASTeX ozone generator and proprietary ozone contacting device The ozone injection was done using stainless steel teflon lined hose above-ground and teflon tubing in the well The contacting device was lowered to one foot above the bottom of the well to maximize contact surface area of the well The ozone injection concentration was 8 wt percent ' 2.2 Hydrogen Peroxide Injections During each of the eight events, well MW-9 was injected with 7 75% hydrogen peroxide The hydrogen peroxide was injected in two steps, half of the dose was pumped in to the well and then the well was pulsed with oxygen pressure to push the hydrogen peroxide out of the well and into the subsurface The hydrogen peroxide was injected through a tube that was adjusted to different levels to give a better distribution of the oxidant The injection at different levels was done to ' spread the oxidant over the long length of screen in MW-9 (-35 to -15 ft) The well was pressured to 10 psig for four minutes and then the pressure was released for two minutes to allow the well to recharge This process was repeated three times The hydrogen peroxide mix was ' made up of one gallon of 35% hydrogen peroxide and four gallons of distilled water A total of 15 gallons of 35% hydrogen peroxide was used during the test, and 60 gallons of distilled water The total volume of liquid injected during the test was less than 2% of the estimated volume of groundwater in the four-foot sampling radius 09i20/04 Applied Process Technology,Inc Confidential lnfonnation APT SO-019 www Apprw�iters,oni Page 4 of 11