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Bioremedial enhancement of hydrocarbon destruction was provided during pile <br /> construction First, approximately 100 pounds of 10-10-10 fertilizer were added to the soil to <br /> furnish nitrogen, then approximately 50 pounds of Solmar Advanced Bio Culture 1.-104 was <br /> mixed with water and added to the soil pile _ <br /> Generally, the F EVEITO system operates by drawing hydrocarbon-Iaden air from the <br /> treatment pile through a moisture separator and particulate filter with a vacuum blower. The <br /> influent is then exposed to temperatures in excess of 1,400 degrees fahrenheit in the thermal <br /> oxidizer for a period of time sufficient to essentially destroy (99 percent) volatile hydrocarbons <br /> Due to the high percentage of destruction, virtually no emissions are discharged to the <br /> atmosphere. <br /> Prior to discharge, the hot thermal oxidizer exhaust is passed through a ceramic heat <br /> exchanger where the incoming stream of fresh air is heated prior to reinjection into the <br /> treatment pile Heating the pile enhances hydrocarbon volatilization and speeds biologic activity <br /> Drawing 3-2 is a schematic of the HEVEi TO process operation <br /> 3 12 Treatment Monitoring <br /> After system start-up, the vapors exiting each extraction pipe (but before treatment) were <br /> monitored for petroleum hydrocarbons using a PID and carbon dioxide meter on a uniform <br /> scheduled basis Soil samples collected from random depths within the pile were periodically <br /> monitored with the PID and IAP Once monitoring data indicated that no further hydrocarbons <br /> were being extracted, the HEVE/TO process was terminated <br /> 3 13 Confirmation Sampling and Analyses <br /> Upon completion of the treatment process, confirmation soil samples were collected from <br /> . locations within the pile as indicated on Drawing 3-4 using an Arts' sampler. These soil <br /> FASCLOSE 3 3-2 92--1177102 36 <br />