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t - 1 <br /> z 10 January 2001 - <br /> • AGE-NC Project No 98-0521 <br /> ' Page 2 of 7_ <br /> 2 2 1 Soil Sample Collection and Analysis <br /> ' r <br /> _ <br /> The soil pilot boring mbQ was advanced to a depth of 20 feet bsg Soil samples were collected to <br /> characterize the subsurface soil profile and identify water-bearing units for monitoring well screen <br /> ' -- placement Installation of the well was performed using a truck-mounted CME 75-HT drill rig <br /> equipped with 8-inch continuous flight hollow-stem augers <br /> Samples were collected from borings at five-foot intervals using a Califorma-modified split spoon <br /> sampler loaded with three clean, 2 x b-inch brass sleeves Upon soil sampler retrieval, the middle <br /> ' - brass sleeve was removed from the sampler Soil samples were preserved by covering both ends of <br /> the selected brass sample sleeve with Teflon sheets, capping, and sealing with duct tape The sample <br /> was then labeled and placed in a chilled container pending transport under chain-of-custody to MAI <br /> for analysis ` <br /> -- All sampling equipment was washed in an Alconox solution and rinsed twice with clean water prior <br /> ' to each sampling run <br /> During drilling, augef returns were monitored for the presence of organic vapor using an organic <br /> vapor analyzer (OVA) equipped with a photo-ionization detector (PID Thermo Environmental <br /> 580A, 10 0 -eV, calibrated to- isobutylene)- Auger returns were placed in Department of <br /> Transportation (DOT) 55-gallon drums-and. stored on-site pending laboratory analysis and disposal <br /> at a licenced facility - - - <br /> ' 2 2 2 Logging - <br /> Duplicate soil samples were extruded from the remaining brass sleeves or from the unpreserved <br /> t portions of the soil in the core barrel sample and were screened for the presence of organic vapor, <br /> using the OVA The OVA readings were recorded on the boring logs Soil samples were visually <br /> t described and logged in accordance with the Unified Soil Classification System (USCS) The boring <br /> logs are presented-in Appendix A <br /> 2 2 3 Monitoring Well Installation and Development <br /> ' = Following drilling and sampling of soil boring MW-4, the soil boring was completed as ground <br /> water monitoring well MW-4, constructed using two 2-inch diameter, schedule 40 PVC casing <br /> •-— - Advanced GcoEivironmental Inc <br />