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Revised CFR Levine-Fricke <br /> 7.5 PhaseData Analysis <br /> Iysis <br /> I <br /> After completion of the Phase III pilot test, the followuig will be performed <br /> ■ calculate the area of influence of the air sparging wells <br /> assess the combined effectiveness of SVE and GAS in reducing vadose zone and <br /> groundwater PClr concentrations <br /> 8.0 PHASE IV PILOT TEST (SVEIGOS) <br /> 8.1 Phase IV Pilot Test Goals <br /> After completion of the Phase XII SVE/GAS pilot test, and when groundwater <br /> concentrations of PCE are at a level that will not cause potemial degradation of the <br /> groundwater through the generation of acids and subsequently chloride ions during <br /> ozone sparging, a Phase IV SVE/GOS test will be performed at the Site <br /> The goal of the Phase IV SVEJGOS pilot test/mvestigation will be to evaluate the <br /> following <br /> . • assess the effectiveness, cost, and applicability of the combined soil vapor <br /> extraction and ozone sparging technology <br /> assess the area of influence of the ozone sparging well to identify optimum well <br /> spacing(s), establish design criteria, and support design of the groundwater sparging <br /> system <br /> - collect the data necessary to assess the area of influence of the ozone spargmg well, <br /> including <br /> changes m organic and inorganic groundwater chemistry such as dissolved <br /> oxygen,-alkalinity, hardness, and pH <br /> water-level changes/pressure responses in monitoring wells due to ozone <br /> sparging <br /> • ozone sparging flow rates and correq*nding pressure responses in the <br /> monitoring wells <br /> collect groundwater VOC concentration data from nionitoring wells surrounding <br /> the ozone sparging well to monitor the effectiveness of this remediation <br /> technology over a set tune at the Property <br /> The investigation assessment data will be used to evaluate the applicability, <br /> effectiveness, and costs that would be expected for a full scale SVEIGOS system for <br /> rernediation of shAlow groundwater beneath the Property <br /> i <br /> wpSYt.0a1.M48123,aoo Irr Page 25 <br /> 0bi$T d 9PT0179b60zT 01 90617 ?_S9 0TS RMDI id 3NIA31 6--n dd 6z 91 eo, 60 `nr <br />