Laserfiche WebLink
�1 <br /> Based on correspondence from SJCPHS, the hydrocarbon concentrations detected during the <br /> l <br /> preliminary site assessment exceeded the recommended Leaking Underground Fuel Tank <br />' (LUFT) action levels SJCPHS directed further site investigation to delineate the lateral extent of <br /> contamination around the tank Site documentation and regulatory correspondence associated <br />' with the project area are included in Appendix B <br /> 2.3 Subsurface Conditions <br /> Based on soil boring logs completed at the site, indigenous subsurface sediments consist <br /> primarily of clay (CL), silt (ML), and sand (SM, SP and SW) to the maximum logged depth of <br /> 26 feet below ground surface (bgs) Coarser grained sediments, such as sand and silty sand, <br /> were generally encountered at 10 to 17 feet bgs As observed from the investigation, <br /> petroleum contamination appeared to reside primarily in this unit at depths of approximately <br /> ' 12 to 17 feet bgs Copies of all boring logs compiled during this investigation are presented In <br /> Appendix C <br /> Based on verbal communication with SJCPHS staff, groundwater to the vicinity of the site is <br /> reported at approximately 80 feet bgs No groundwater or significant moisture was <br /> encountered in any borings during the subsurface investigation <br /> 1 <br /> r <br /> r <br /> r <br /> r <br />_r <br /> r <br /> TETRA TECH Stockton Developmental Center,Phase 11 Site Investigation Report Page 6 <br /> r <br />