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13 December 1995 <br /> AGE-NC Project No. 95-0109 <br /> Page 7 of 8 <br /> 19. Store purged water in 55-gallon DOT drums on-site pending analytical results. <br /> 4.2. LABORATORY BIOTREATIBILITY TESTING <br /> 1. Collect ground water samples from MW-8, MW-9, MW-14 and EW-1 using dedicated <br /> bailers. Samples will be collected in 40-m1 non-preserved VOA vials and 1-liter amber bottles. <br /> 2. Label and log water sample on a chain-of-custody form. <br /> 3. Transmit samples under chain-of-custody form to A. Keith Kaufrnan. <br /> 4. Supplement samples with varying concentrations and combinations of nutrients (ammonium <br /> nitrate and hydrogen peroxide) and observe biological growth rates. Concentrations of <br /> nutrients to be added to ground water at the site will be based on laboratory findings. <br /> 4.3. ADDITION OF AMMONIUM NITRATE TO SOIL <br /> The volume of total petroleum hydrocarbons remaining in the soil at the site was estimated by <br /> multiplying the volume if impacted soil by the average TPH concentration. A volume of <br /> approximately 1260 gallons of petroleum hydrocarbons was estimated to remain in the soil at the site. <br /> Based on TPH volume in the soil, approximately 350 gallons of ammonium nitrate will be added to <br /> the soil to supply the necessary nitrogen. Application will be conducted in 2 phases approximately <br /> 3 to 4 months apart. <br /> 1. Obtain approximately 175 gallons of 100%concentration ammonium nitrate. The ammonium <br /> nitrate will be diluted to approximately 10% concentration for application. <br /> 2. Apply ammonium nitrate solution through existing vadose-zone wells. Packers may be used <br /> to control the depth of injection. Additional injection points will also be installed using a <br /> Geoprobe. Temporary casings will be placed in the probings for injection. The casings will <br /> then be removed and the probing backfilled with cement. <br /> 3. Obtain soil samples during the following quarterly soil probing for analysis of nutrient <br /> concentrations and microbiological remediation progress. The amount of additional nutrients <br /> will then be determined and a second application will be performed approximately 3 to 4 <br /> months after the first application. <br />