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u <br /> Soil Vapor Extraction and Air Sparge Feasibility Evaluation Work Plan <br /> University Park <br /> September 15,2004 <br /> Page 7 <br /> zone gas samples will be collected for the field measurement of organic vapors. Water samples will be <br /> collected from the AS well and the observation wells for the field measurement of D.O. The test will be <br /> repeated at two higher applied pressures. It is anticipated that each test will last two hours or less. <br /> { 6.0 COMBINED SVE AND AS PILOT TEST <br /> This section describes the proposed combined SVE and AS pilot test.to be conducted at the site. Data <br /> collected during the pilot test will be used in designing the overall SVE and AS remediation system. The <br /> purpose of the test is to evaluate how operating the SVE and AS systems simultaneously affects the SVE 3 <br /> radius of influence, changes in water levels, and changes in organic vapor concentrations. At least 48 <br /> } hours prior to implementation of the pilot test, Condor will notify the.SJCAPCD and the SJCEHD. <br /> 6.1 COMBINED SVE AND AS PILOT TEST PROCEDURES <br /> ` The setup for the combined pilot test is the same as for the SVE and AS pilot tests, except that the helium <br /> gas tracer will not be used. The SVE test will be initiated first at the optimum vacuum determined during <br /> the previous SVE pilot test. The applied vacuum and airflow rate at the SVE extraction well will be ! <br /> monitored and recorded. The induced vacuum and the depth to water at the observation wells will be <br /> monitored and recorded. After the SVE system has achieved steady state conditions, the AS test will be <br /> started. Influent and effluent vapor samples will be collected for laboratory analyses from the SVE system <br /> F prior to starting the AS test and toward the end of the combined test. Vapor sample collection and <br /> i laboratory analyses will be the same as described in section 4.2. Periodic measurements of organic vapor <br /> concentrations will be made of the vapor influent to the blower and at the effluent from the carbon <br /> canisters using a PID. It is anticipated that the combined SVE and AS pilot test will continue for a <br /> minimum of at least 12 hours. <br /> 7.0 REPORTING <br /> f A report describing the SVE well installation, the AS well installation, and the pilot test activities will be <br /> prepared for submittal to the SJCEHD. At a minimum the report will include: (1) a description of the <br /> fieldwork conducted at the site, (2)the results of the pilot tests, and(3)Condor's recommendations.' i <br /> j <br /> 1 <br /> i <br /> 1k <br /> f <br /> 1 <br /> 1 <br /> A <br /> i1� CONDOR <br />