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CLEARWATER <br />' G R O U P <br /> £nveronmenloi Services <br /> Additional wells may be installed at a later time depending upon the performance of the initial <br /> Y P g P <br />' system configuration A permit application for the proposed injection wells is being submitted to <br /> SJC-EHS concurrently with this report <br /> 6.6 Deployment of iSOC Components <br /> The 1SOC infusion units (infusers) consist of a cylindrical perforated stainless steel casing, which <br /> houses the micro-porous hollow fiber material, which diffuses 02 to groundwater These <br /> Icomponents are connected to i/4-inch polyurethane tubing, which delivers a regulated 02 supply <br /> from the 02 gas cylinder and pressure regulator Tubing will be installed in narrow 12-inch-deep <br /> (approx ) saw-cut trenches A maximum of three iSOC units can be connected to a single 3-way <br /> control panel Based on manufacturer recommendations, the system will be operated at an <br /> oxygen flow rate of 15 cubic centimeters per minute (cc/min) and a pressure of 5 pounds per <br /> square inch (psi) above the maximum static water pressure Clearwater proposes to deploy up to <br /> six iSOC units and two 3-unit control panels during the initial phase Additional iSOC units may <br /> be added depending upon the performance of the initial system configuration If a positive effect <br /> 1s observed, additional iSOC units may be deployed, or the onginal six units may be relocated <br /> Figure 7 illustrates the proposed trenching layout, proposed iSOC injection well locations, and <br /> possible iSOC equipment shed locations <br /> 6.7 iSOC System Operations & Maintenance <br /> Routine O&M work will consist of field measurement of dissolved oxygen in selected <br /> injection/monitoring wells, documentation of oxygen consumption, and periodic nutrient <br /> Iinjections Clearwater will perform the O&M work at two--week intervals for the first month of <br /> operation, and on a monthly basis thereafter After the system stabilizes, monitoring will be <br />' performed on a quarterly basis and in conjunction with Quarterly Groundwater Monitoring <br /> Quarterly Monitoring Reports will provide groundwater monitoring results, and an update of <br /> system performance, adjustments, compliance, and other pertinent information Quarterly <br /> monitoring data may also provide basis for periodic relocation of 1SOC infusers <br /> ZB 178C RAP 22 May 18,2004 <br />