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)1 - Mr Frank Girardi <br /> December 3,2007 <br /> CONESTOGA-ROVERS - <br /> &ASSOCIATES - <br /> I <br /> • Groundwater flow direction beneath the site is somewhat variable, but is predominantly towards the <br /> northeast. <br /> • Upgradient assessment is not warranted due to the presence of the adjacent upgradient Castle Motors <br /> site. <br /> • The horizontal extend of impacted,groundwaterto the south and east is generally defined by wells <br /> MW-4 and MW-6,respectively. <br /> • The vertical extent of impacted onsite soil and groundwater is unknown. <br /> • The horizontal extent of impacted groundwater southeast of well MW-5 and at the northern boundary <br /> of the site is unknown <br /> • Shell proposes drilling three-soil borinss to assess thcfvertic`al`exfent of impacted onsite soil and <br /> groundwater. <br /> • Shell proposes drilling,ftwo`soi s to assess therhor�izontal extent-of impacted soil and <br /> ��-- <br /> groundwater southeast of well MW-5 and at the northern boundary of the site. The borings will be <br /> converted to groundwater monitoring wells. <br /> -a <br /> WORK TASKS = _ <br /> is <br /> Permits: A permit for drilling will be obtained from the SJCEHD. <br /> Health and Safety Plan:A site-specific.Health and Safety Plan will be prepared for fieldwork.. <br /> Utility Clearance: The proposed drilling locations will be marked and the locations cleared through <br /> Underground Service Alert and a private underground utility locating company prior to drilling: <br /> ii <br /> Site Investigation: Five exploratory soil borings (CPT-1 through CPT-3, MW-71 and MW-8) will be <br /> drilled at the locations shown on Figure 2 using hollow-stem auger (HSA) or cone penetration testing <br /> (CPT)equipment. The HSA borings will be converted to groundwater monitoring wells. <br /> i <br />{ Borings.CPthrough-CRT-3 will be electronically logged using CPT logging techniques. Borings <br /> CPT-1 through CPT-3 will be.. a�c_ed-to 80 feet below grade (fb)to assess the vertical extent of <br /> impacted soil and groundwater beneath-the site. Soil samples will be collected and submitted for analysis <br /> from borings CPT-1 through CPT-3 at.5-foot intervals. Soil samples will be screened in the field for <br /> organic vapors using a photo-ionization detector. all <br /> (Groundwater sampling.intervals.for borings CPT-1 through CPT-3 will be.determined m the field based? <br /> Y g'i� g �.� _._ feed in the " <br /> on the,soil es identified b the eleetromc to Moderate to hi h_P ermeabih soils idents <br /> 1641 3 <br /> Worldwide Engineering,Environmental,Construction,and IT Services <br /> I <br />