Laserfiche WebLink
�A■Mru� <br /> �iwt►i►i i■�i <br /> Workrng to Restore Nature <br /> 4.0 SCOPE OF WORK <br /> Work at the site was performed in accordance with our Work Plan 31009-1W (May 17, <br /> 1991) and Addendums to Work Plan 31009-4W (April 7, 1992), 31009-4 (August 11, 1992), <br /> 31009-4 (August 13, 1992), and 31009-7 (June 9, 1993) Our methods for field work are <br /> described in Appendix A. Work was also conducted according to our Site Safety Plan <br /> generated for the site and updated throughout the investigation <br /> 4.1 Assessment of Soil <br /> 4.1.1 Soil Borings <br /> To evaluate and delineate residual hydrocarbons in soil, nineteen soil borings were drilled <br /> onsite between July 1991 and January 1993 (RESNA, August 11, 1992, and RESNA. June <br /> 9, 1993), and two soil borings were drilled offsite during October 1993 (RESNA, January <br /> 11, 1994). Borings B-1 through B-4 were drilled in July 1991, borings B-5 through B-12 were <br /> drilled in April and May 1992, borings B-13 through B-19 were drilled in January 1993, and <br /> borings B-20 and B-21 were drilled in October 1993 Soil boring locations are shown on <br /> Plate 2 The details of the borings such as depth, diameter, and drilling method are shown <br /> on Table 2 <br /> A geologist from RESNA collected soil samples from each boring for possible laboratory <br /> analyses and to characterize the geology beneath the site Sediments were logged using <br /> visual and manual methods and classified according to the Unified Soil Classification System <br /> (Appendix B). The geologist also analyzed the soil samples with a field photoionization <br /> detector to characterize the relative levels of hydrocarbons in the samples The sediments <br /> encountered and the phototonization detector readings are presented on the Logs of Borings <br /> (Appendix B) <br /> 31009-10 4 <br />