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Ge0bg1cal rechma PLC Page 2 In Situ Remediation Feasibility Study Project No 507 2 September 20,2002 which is an equipment sales and service business In 1991 the property was transferred from Quimby to Geo Corp Apparently the tanks were installed during the time Quimby roperated a John Deer facility and J M Equipment continued to operate them until they were removed In April, 1999, responsibility for the adjacent independent trucking facility monitoring wells MW-1, MW-2, MW-3, MW-8 and MW-9 were transferred to J M Equipment GTT also completed site investigation work which included the installation of three additional monitoring wells, two hand borings to 15 feet below grade surface (bgs), three soil borings advanced to 30 feet bgs, and one deep boring to 70 feet bgs The three new wells, MW-4 ' through MW-6, and five existing wells have been monitored quarterly since January 2000 In an effort to define the lateral extent of petroleum hydrocarbons, three soil borings, MW- 7, MW-10 and SB-6 were advanced in May 2001 The borings were located approximately 200 feet southwest, 150 feet northwest and 100 feet west of, respectively, the former UST location (see Figure 2) To define the vertical extent of petroleum hydrocarbons, one soil boring, MW-109 was also advanced to 80 feet bgs in the location of the former UST Borings MW-7, MW-10 and MW-109 were converted into monitoring wells The data indicates that a significant gasoline plume is present in groundwater at the site 2.0 SITE CHARACTERISTICS ' 2.1 Geology Figures 4 and 6 are cross section diagrams illustrating the site geology (see Figure 2 for locations of the cross section) ' The geology of the site has been field logged as predominately clays and sandy clays with lesser amounts of silts and sands In May 2001, soil samples from borings SB-6, MW-7, MW-10 and MW-109 were submitted to Cooper Testing Lab Inc (Cooper) for geo- technical analysis The results of the Cooper analyses are summarized in the following table Sample Particle Size Distribution Soil Gravel % Sand % Silt % Clay % Classification MW-7 @ 20' = 188 467 345 SILT wlsand MW-10 @ 25' 73 590 337 SILT w/trace sand MW-10 @ 30' - 258 54 1 20 1 SILT w/sand MW-109 @ 75' - 30 553 417 CLAY silty SB-6 @ 35' 05 83 7 98 60 Silty SAND