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Nutrient and hydrogen peroxide bearing water will be added to the <br /> -� soil below the pit containing the gasaliie tanks through well <br /> 29P. That water will percolate down to the water table following <br /> the same route the pollutants used and allow R.icrobial <br /> degradation of pollutants above the water table. Those solutions <br /> will also be recovered through well MW-19- <br /> NUTRIENT ADDITION CONTROL <br /> Nutrients will be metered into the recycle wa stream via a <br /> mixing tank and pump system (1000-200 llon tank) which will <br /> contain a 3-4 week inventory. H ,.roxide will also ue <br /> z . <br /> metei-ed into the recycle strew an mixed with the nutrient feed. <br /> { Sensors may be placed. in th to flow line coming from the <br /> roundwater recover•y,s'ste4 .ontinuously measure dissolved i <br /> ' oxygen Nutrient and 01. a addition levels will be <br /> automatically cont rolled to maintain optimum concentrations irr ' <br /> the reinjected water. The peroxide will be stored at .,5% or 50% <br /> concentration, `and.Ail uted to.'the desired concentration by - <br /> `meteriog .slowly. into. the recycle flaw. Piping necessary to <br /> suPp .� <br /> ithe:. recirculation `flow. back to the injection wells wi,l1` be <br /> � <br /> buried, where appropriate, to permit continuous access to the gas <br /> 'stati,on. The system contain alarms to notify area personnel <br /> f n <br /> If the system fails due to high pressure or of excessive drawl,)wn <br /> i in .the well . The system is designed to automatically shut down. �s <br /> in case of significant malfunctions. <br /> F r -34- <br /> +bfti �'� 3.3Ys. .y,f.•i+.l&::,+:hrFw+K�.....nn�is.rrta ,�.wa,.....w. .,..,., - ,5.......A.�� - <br /> 77. <br /> �z <br /> lkw <br />