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ARCADIS Ms. Lisa Medina <br /> June 22, 2012 <br /> of mass contained within the unsaturated zone. Petroleum hydrocarbons removed <br /> through SVE undergo vapor treatment above ground surface typically through carbon <br /> adsorption or catalytic oxidation. <br /> 3.0 Proposed Scope of Work <br /> The pilot test will be conducted to evaluate the applicability of SVE technology for <br /> addressing soil which has been impacted by petroleum hydrocarbons. The pilot test <br /> will include the following tasks: <br /> 1. Installation of two wells (one vapor extraction well and one monitoring point) <br /> 2. Completion of an SVE test using the newly installed wells <br /> 3. Data analysis and reporting <br /> The vapor extraction well and monitoring point installation activities are described in <br /> Section 4, and the pilot test activities are described in Section 5. <br /> 4.0 Soil Vapor Extraction Well and Monitoring Point Installation Activities <br /> ARCADIS proposes installing two wells (designated SVE-1 and SVE-2) in the vicinity <br /> of the former pump islands, located in the southwest portion of the site, as indicated <br /> on Figure 2. <br /> 4.1 Extraction Well Installations <br /> The well locations were selected based on the elevated soil analytical results <br /> reported during the 2010 site assessment(ARCADIS, 2011). The proposed wells will <br /> be screened between approximately 55 and 70 feet bgs (and/or first encountered <br /> water). This preliminary screen interval was selected based on existing Iithologic <br /> information, and is subject to change in the field based on encountered conditions. <br /> 4.2 Permitting <br /> Applicable permits will be obtained from the San Joaquin County Environmental <br /> Health Department, prior to commencing field activities. <br /> Page: <br /> GVpigeRENNBRLPdJSY`fi UNrverzUbIM64 RwN5VEPM�wkNnILMp5�1H92]EP SVERMTMYIP 3/9 <br />