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1 S <br /> 07 July 2000 <br /> AGE-NC Project No 98-0448 <br />' Page 11 of 12 i <br /> between the well casing and the inner wall of the hollow stem auger The filter pack will be placed <br />' adjacent to the screen(0 020 inch screen size) from the bottom of the boring to a point approximately <br /> 2 feet above the top of the screen A three foot interval of coated bentonite pellets (pell plug) will <br />' be placed above the filter pack and will serve as an annular seal Portland cement will be utilized to <br /> grout from the annular seal to surface grade A proposed IAS infection well diagram is included as <br /> Figures 7 <br /> I <br /> 4 3 2 In-situ Air Sparging Piping System <br /> An electric air compressor will operate Independently from the SVE unit This will allow for control <br /> of air flow to each IAS well and "surging" of the IAS system, if necessary, to prevent mounding <br /> and/or migration of the dissolved hydrocarbons <br /> A network of one-inch diameter, schedule 80 PVC piping will be Installed in a series of trenches <br /> approximately 6-inch wide and 12-Inches deep The PVC piping will be routed from each IAS well <br /> head to an air compressor A PVC ball valve will be Installed at each LAS well head so that,air flow <br /> can be depressed independently A plan of the proposed air sparging piping system is depicted in <br /> Figure 5 <br />' The'location of the air compressor is proposed near the southwest corner of the warehouse building <br /> structure at the site(Figure�5) The air compressor will be secured by a chain-linked,gated enclosure <br /> with measurements 10 feet wide by 15 feet long and seven feet in height <br /> 4 3 3 In-situ Air Spargmg Monitoring Activities <br /> Quarterly ground water monitoring and sampling is proposed throughout the remediation period <br /> However, monthly measurements of ground water depth and dissolved oxygen from ground water <br /> monitoring wells will be performed to determine if ground water mounding is occurring as a result <br /> of the IAS system operation Monthly monitoring should continue throughout the remediation <br /> period <br /> 44 PERMITTING <br /> An application for a sites specific permit will be submitted to the San Joaquin Valle Air Pollution <br /> PP P P q Y <br /> Control District (SJVAPCD) prior to initiation of the remediation project In addition, proper <br /> building permits will be obtained from the City of Stockton Building Department for necessary <br /> construction work, including natural gas and electrical source Installations <br /> , <br /> Advanced GeoEnviron mental,Inc <br /> i <br />