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1 1 Work Between November 2002 and November 2004 <br /> Quarterly ground water sampling of installed monitoring wells has been supplemented <br /> ' with cone penetration testing and hydropunch first encountered ground water collection <br /> of the area north and east of the site with attention directed towards plume definition at <br /> the 50 to 70 FT bgs uppermost ground water The results of these findings are <br /> summarized in several reports fumished to the Client and Overseeing Agencies A work <br /> plan has been drafted and submitted (August 12, 2004) proposing excavation of the area <br /> ' studied in this current surface exploration effort The work plan contains all analytical <br /> findings to date including ground water and earlier sod contaminant concentrations <br /> 1,2.1 Soil Sampling <br /> ' On November 22, 2004, Western Oil staff, using a John Deere backhoe model , <br /> excavated shallow trenches verifying facility installed utilities between the concrete block <br /> retaining wall and the facility's eastem property line at five different locations (E-1, E-2, E- <br /> 3, E-4, E-5) to a maximum depth of 14 FT Sod samples were collected at several depths <br /> in several locations within the individual trenches Weather was moderate during the <br /> ' partial day of excavation with cool Fall temperatures, calm breeze and no precipitation <br /> ' A total of 10 sod samples were collected and field classified Previous borings in the <br /> immediate region indicated ND levels of gasoline, BTEX and other concentrations <br /> ' immediately hazardous to sampling personnel Soil samples to be tested were contained <br /> in 250 ml open mouthed laboratory furnished glass jars with Teflon cover sheets and <br /> screw tops All samples were capped, labeled and chilled Samples were transported to <br /> and analyzed by Sequoia Analytical-Sacramento, a DOHS Certified analytical laboratory <br /> The 10 samples selected were analyzed for Kerosene (C10-C16), Diesel (C10-C28) and <br /> ' Motor Oil (C16-C36) ranges of hydrocarbons Representative asphalt classed <br /> hydrocarbons he within this spectrum <br /> Holes were backfilled with their excavated material on the same day using the backhoe's <br /> bucket for compaction <br /> ' 3 <br /> 1 <br />