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10 June 2008 <br /> AGE-NC Project No. 97-0312 <br /> Page 2 of 11 <br /> • Drilling,soil sampling, installation and survey.of three shallow SVE wells; <br /> • Laboratory analysis of soil samples; <br /> • High vacuum SVE pilot test; <br /> • Evaluation of the pilot studies with preparation of a report of findings; <br /> The tasks for thero osed scope of work are discussed:below.. <br /> P P P <br /> 2.1. , PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site"permits will be obtained from the EHD(i.e. drilling/well installation permits).In <br /> addition,an update to the health and safety plan presently on-file will be prepared in accordance with <br /> Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities(National <br /> Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. <br /> Environmental Protection Agency,1985).Prior to mobilization,all underground trenching areas will <br /> be clearly marked and a utility clearance obtained-through Underground Service Alert. <br /> 2.2. SVE WELL SOIL BORING AND SOIL SAMPLE'COLLECTION <br /> A total of three shallow soil borings (VW1; VW2 and VW3) will be advanced ori-site for the <br /> purposes of soil sample collection and installation of SVE wells for the SVE test.The targeted depth <br /> of proposed borings are approximately 30 feet below surface grade(bsg)which corresponds to the <br /> depth of the shallow plume vertical migration near the source area(Figures 3 and 4).Procedures for <br /> advancement of soil borings and soil sampling are presented in Section 3:1. <br /> I <br /> 2.3. SVE WELL INSTALLATION <br /> Based data from the February 2008 ground water monitoring event; depth to ground water was <br /> measured at an average 61 feet bsg. Currently, monitoring well MW-5 is screened through the <br /> vadose zone and is located in or near the suspected core area of the soil hydrocarbon-impacted area <br /> at the site(Figures 3 and 4).The adsorbed hydrocarbon-impacted plumes occur at differing depths <br /> and spatial orientation and will be treated as separate contamination events.AGE is proposing to <br /> install"a set of high-vacuum.SVE wells for performance of a SVE Test that concentrates is <br /> examination to the central plume on site. + <br /> The screened interval for the current ground water monitoring well network was not designed to <br /> Advanced GeoEnvironmentat,Inc. <br /> i <br />