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21 March 1997 <br /> AGE-NC Project No 95-0173 <br /> Page 4 of 8 <br /> content as well as other parameters necessary for specific environmental fate evaluations Selected <br /> samples will also be transmitted to a microbiological laboratory for physicochemical analysis and <br /> microbiological enumeration to determine existing bacteria populations Prior to laboratory analysis, <br /> the PHS-EHD will be given an opportunity to review samples selected for analysis <br /> 3 5 SOIL VAPOR EXTRACTION PILOT TEST <br /> Following well installation, a soil vapor extraction (SVE) pilot test will be performed in order to <br /> determine remedial feasibility Soil vapor field parameters and analytical results will facilitate the <br /> design of an SVE system and will be used to determine the number of vapor wells, the spacing of <br /> wells and the selection of an SVE system <br /> An internal combustion (IC) driven engine will be used to apply a vacuum on one of the SVE well <br /> screened intervals while the flow from other selected screened intervals are measured The duration <br /> of the SVE pilot test will be approximately 8-hours Soil vapor samples will be collected at regular <br /> intervals in Tedlar bags and analyzed. for TPH-g, TPH-d, BTE&X and MTBE at a state certified <br /> . laboratory Results of the SVE pilot test will be included in a Corrective Action Plan (CAP) and <br /> submitted to PHS-EHD <br /> 36 AIR SPARGING PILOT TEST <br /> For perfonnance of an in-situ air sparging (IAS) pilot test, a compressor driven unit will be used to <br /> infect air into the subsurface via the IAS well Data collected during the IAS pilot test will be used <br /> to determine if IAS is a feasible remedial option for this site <br /> The IAS pilot test will be operated for a period of 96-hours (4 days) Several parameters, including <br /> radius of influence, sparging rate, sparging vapor concentrations, ground water depths and dissolved <br /> oxygen will be measured at regular intervals Results of the IAS pilot test will be included in a CAP <br /> 4.4. PROCEDURES <br /> 4 1 ADVANCEMENT AND SAMPLING OF SOIL BORINGS <br /> The following procedures will be performed for the advancement of soil probe borings <br /> Notify the Public Health Services -Environmental Health Division at least 48 hours prior to <br /> • commencement of any work, while securing proper city/county permits <br />