Laserfiche WebLink
2 <br /> • Provide geophysical clearance for each boring location and a 10 foot by 10 foot <br /> area surrounding the boring location in case underground utilities interfere with <br /> placement of the boring; <br /> • Hand auger up to five feet in each boring location; and <br /> • Log each borehole using the Unified Soil Classification System. <br /> Environmental Borings <br /> To address the further delineation of areas of environmental impact in the six AOIs <br /> (excavation areas),the following will be conducted: <br /> AOI-1 <br /> • Five soil borings (AOII-1 through A0I1-5) will be hand angered to a depth of <br /> approximately 3 feet below ground surface (bgs); and <br /> • Samples will be collected at I and 3 feet in each boring (depth of impact observed <br /> in on-site boring B1-2) and will be analyzed for polycyclic aromatic hydrocarbons <br /> (PAHs) using United States Environmental Protection Agency (EPA) Method <br /> 8270C Selective Ion Monitoring. <br /> AOI-2 <br /> • Four soil borings (AOI2-1 through A0I2-4) will be hand angered to a depth of <br /> approximately 3 feet bgs in the area near the south end of the on-site Pole Rack to <br /> further delineate impacts identified in RI Boring E2-2; and <br /> • Samples will be collected at I and 3 feet in each boring (depth of impact observed <br /> in on-site boring E2-2) and will be analyzed for PAHs using EPA Method 8270C <br /> Selective Ion Monitoring. <br /> AOI-3 <br /> • Three soil borings (AOI3-1 through A0I3-3) will be drilled to a maximum depth of <br /> 15 feet bgs to further delineate impacts observed in RI Boring E3-1. The first five <br /> feet in these borings will be hand angered to a depth of approximately 5 feet bgs; <br /> and <br /> • Samples will be collected at 1, 3, 5, 10 and 15 feet in each boring (depth of impact <br /> observed in on-site boring E3-1)and will be analyzed for PAHs using EPA Method <br /> 8270C Selective Ion Monitoring and TPH using EPA Method 8015. <br /> AOI-4 <br /> • Three soil borings (AOI4-1 through A0I4-3)will be drilled to a maximum depth of <br /> 15 feet bgs to further delineate impacts observed in RI Boring A3-2. The fust five <br /> feet in these borings will be hand angered to a depth of approximately 5 feet bgs; <br /> and <br /> • Samples will be collected at 1, 3, 5, 10 and 15 feet in each boring (depth of impact <br /> observed in on-site boring A3-2) and will be analyzed for PAHs using EPA Method <br /> 8270C Selective Ion Monitoring and TPH using EPA Method 8015. <br />