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J f 2-4 r• . A monitoring well as constructed in each borehole by inserting a 2-inch-inside-diameter, I Schedule 40 polyvinyl chlorid;; (PVC) casing with 25 feet of 0.020-inch slotted well screen ! attached to the bottom. The PCrfomted casing extends approximately 20 feet below the water table and 5 feet above the water table in order to accommodate water table fluctuations. A bottom plug was installed at the bottom of the perforated interval. I t To filter pack the well, Number 3 size sand was poured directly through the augers as the i s augers were gradually removed from the borehole. A bentonite seal was placed immediately above the gravel pack and the augers were then removed from the borehole. The remaining 0 annular space of each well was filled with a bentonite/cement slurry. Each well was completed at grade with a CNI box. r Extraction Well The extraction well borehole was advanced to approximately 80 feet,or about 20 feet below the groundwater surface using 6-inch hollow-stem augers. Soil samples were not collected The borehole was continuously cored from the ew the water table using a 5-foot-long, 3-inch-diameter core barreundwater l.The core barrelle to a depth of was asedriven ahead of the auger into undisturbed soil. The borehole was logged from the continuous core from 60 to 81 feet below ground surface using the Unified Soil Classification system. The borehole log is presented in Appendix A. One soil sample was collected from the continuous cors for grain --� size analysis to assist in selection of the well screen size. The grain size analysis ,and }. .� interpretation am included as Appendix B. The borehole was then reamed out to total depth using 12-inch augers. Cuttings from the groundwater extraction well borehole were sioresl on E. visquine on site. ' A groundwater extraction well was then constructed in the borehole by inserting a 6-inch- inch slotted well side-diameter,Schedule 40 PVC casing with 25 feet of 0.020-inscreen attached to the bottom. The perforated casing extends approximately 20 feet below the water table and 5 feet above the water table. A bottom plug was installed at the bottom of the perforated interval. i To filter pack the well,Number I L.onestar Sand was poured directly through the augers �f as the augers were gradually removed from the borehole. The sand was filled to roughly 2 feet above the screened interval. A bentonite seal was placed immediately above the gravel pack and [ the augers were then removed from the borehole. The remaining annular space of the well was filled with a concrete/bentonite slurry. The well as completed at grade with a CNI box plumbed for two pumps. -- -- Vapor_Extraction -Wells— - I Each vapor extraction borehole was advanced to approximately 55 feet below ground surface using 10-inch hollow-stem augers, For vapor extraction wells V-2, V-6, V-7,and V-8,samples for lithologfc classification end laboratory analyses were collected at 5-foot intervals. For the j � uemaining vapor extraction wells soil sampling was conducted only if field evidence of