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1 <br />1 <br />' Soil Borings and Wells <br />FIELD METHODS <br />Monitoring wells MW-l through MW-4 were completed at the site by Paragon on July 9 and <br />10, 2001. The approximate locations of the soil borings and wells are shown on Figure 3 in <br />' Appendix A. The drilling and well installation services were performed by a three-man <br />crew consisting of a field engineer, a driller and a driller's helper. <br />' Completion on the soil borings was performed with struck-mounted CME-75 rotary type <br />drill rig. The borings were advanced with 4 'i~-inch inside diameter hollow-stem augers. <br />The augers were advanced to depths of approximately 20 to 35 feet below the ground <br />' surface. Excess auger cuttings were left on site. <br />Field logs of each boring were prepared by the Paragon field engineer. The logs contain <br />' visual-tactual classifications of the materials encountered during drilling, as well as the <br />driller's interpretation of subsurface conditions based on drilling resistance and difficulty. <br />' Soil Sampline <br />' Split-spoon sampling techniques were used to collect soil samples from MW-1 and MW-2. <br />Two (2) soil samples were selected from MW-2 for laboratory analyses. The soil samples <br />were placed in amber glass bottles with Teflon seals. The samples were transported under <br />' standard Paragon chain-of-custody procedures to Technology Laboratory, Inc. (TLI) in Fort <br />Collins, Colorado for chemical analyses. <br />' Well Development and Samplin <br />The monitoring wells were developed by Paragon personnel by bailing and surging the well <br />' with a disposable polypropylene bailer attached to polypropylene rope. A clean bailer was <br />used for developing each well. Prior to development, the depth to the water table was <br />' gauged and dissolved oxygen measurements were recorded in each monitoring well. During <br />development, temperature, pH and conductivity measurements were recorded. The well was <br />considered developed when the temperature, pH and conductivity of the bailed water <br />' appeared to have stabilized. During development, a minimum of five (5) well volumes were <br />removed from the well. <br />' Groundwater samples were collected from monitoring wells MW-1 through MW-4 and EW- <br />1 on July 25, 2001. Groundwater samples collected from the wells were transferred into pre- <br />' cleaned sample containers and transported under standard Paragon chain-of-custody <br />procedures to TLI for chemical analyses. <br />1 <br />1 <br />