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Ms Vicki McCartney Project No 8800401A0201 <br /> October 26, 2004 <br /> Page 2 <br /> dispenser islands Soil samples were collected from beneath the dispensers and along <br /> the product lines at a depth of approximately 3 5 feet below ground surface (bgs) <br /> Remedial activities conducted in January 2000 included removal of approximately <br /> 262 tons of impacted soil in the area of the dispenser and product lines Excavation was <br />�t restricted laterally by concrete canopy footings and asphalt surfacing Maximum <br /> excavation depth was 10 feet bgs due to shallow groundwater depth <br /> Five Geoprobe® borings (GP-1 through GP-5) were advanced on August 15 and 16, <br /> 2000 Each bonng was advanced to groundwater, at which time a discrete water sample <br /> was collected Following groundwater sample collection, each boring was advanced to a <br /> maximum depth of 30 feet bgs <br /> Three groundwater monitoring wells MW-1 through MW-3 were installed on <br /> September 6, 2000 The well locations were selected based upon results of the <br /> Geoprobe® investigation Quarterly groundwater monitoring has been conducted at the <br /> site since the First Quarter 2001 event <br /> On May 23, 2002, two monitoring wells (MW-4 and MW-5) were installed The two <br /> well borings were drilled to a total depth of 25 feet bgs One deep boring was advanced <br /> adjacent to well MW-1 to define the vertical extent of methyl tert-butyl ether (MtBE) in <br /> soil and groundwater at the site This boring was continuously cored from 30 feet bgs to <br />�! the total depth of 54 feet bgs to provide a complete lithologic description of subsurface <br /> conditions <br /> A dual phase extraction DPE test was conducted from June 10 through 15 2002 The <br /> p (DPE) g <br /> DPE test was conducted by simultaneously extracting soil vapor and groundwater from <br /> well MW-1 Based on the results of the DPE test, DPE appears to be an effective <br /> remedial alternative to remove MtBE and other oxygenates from soil and groundwater, <br /> and control off-site migration <br /> On September 2 and 3, 2003, Shaw observed the advancement of four cone penetration <br /> test (CPT) borings (CPT-1 through CPT-4) The CPT borings were advanced to a total <br /> N 1SacDP42004RJ188018800401A 4ad dm Shaw Environmental, Inc <br />