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WALLACE- KUHL <br /> &ASSOCIATES INC. August 31, 2001 <br /> Geoleclmicai Engirieeriny <br /> Mr. Jeffrey Wong <br /> F. Engineering Geology <br /> San Joaquin County Public Health Services <br /> E Environmental Health Division <br /> Environnierlal consoll.imi 304 East Weber Avenue Third Floor <br /> Stockton, California 95202 <br /> Remecllalion 5erlices <br /> i <br /> Conslri.ic.lionlnspecl.ion RemedialAetionPlan <br /> CRYSTAL CREAMERY STOCKTON <br /> :,� l�lialei'lals TesLiny <br /> a 404 West Fremont Street <br /> Stockton, California 95203 <br /> VVKA No. 1628.09 <br /> Introduction <br /> �fn <br /> ==` In accordance with the requirements of San Joaquin County Public Health Services— <br /> "===`'"" Environmental Health Division(SJCPHS-EHD),we have prepared this Remedial <br /> Action Plan(RAP) detailing the design parameters of a remediation system for <br /> groundwater contaminated with petroleum hydrocarbons for the above referenced site <br /> 9 (Plate 1). Given our findings, we are proposing the use of an in situ air sparginglsoil <br /> vapor extraction system(SUES)for removing light end dissolved-phase and residual- ' <br /> phase petroleum hydrocarbons from groundwater beneath the site and the <br /> intermediate zone between groundwater and unsaturated soils(vadose zone). <br /> The proposed system functions by injecting air into the groundwater for the purpose <br /> of stripping petroleum hydrocarbons and VOCs dissolved in groundwater or <br /> contained in the vadose zone. The air forms bubbles that rise into the vadose and <br /> corzr�ol�A�r r of l�i(:;- unsaturated zones carrying trapped and dissolved petroleum hydrocarbons and <br /> 30"o lrdnstl;al Blvd. volatile organic compounds(VOCs): Additionally,the air sparging system provides <br /> Wes[ sacramen o oxygen to groundwater stimulating activity of the naturally occurring <br /> CA 95691 <br /> TO 916.372.)ii3n, .microorganisms that work to degrade petroleum hydrocarbons. Once the target <br /> l=<<x 916.�r2.z505 <br /> compounds have been stripped from the groundwater, a series of soil vapor extraction <br /> wellsWs installed in the unsaturated zone will collect the s ar ed air. The <br /> l ADO Menlo Drive, ) 1� g <br /> 7Ai-,0o captured air will then be treated(scrubbed)prior to being released to the atmosphere. <br /> I:oclaln,CA 9576 <br /> Tel 916JI �.1,72 <br /> Dax 91C, 5 Y 2 <br /> I <br /> _ I <br />