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�- enviros, <br /> Former product lines encountered in the northeastern corner of the new UST excavation at <br /> a depth of approximately 8 fbg were left in place due to the depth at which they were <br /> encountered. This action was approved by the SJCPHS representative. <br /> 9.0 SOIL STOCKPILE DISPOSITION <br /> Three soil stockpiles were generated during station remodeling activities;one from the <br /> removed UST excavation, one from removed product line trenching activities, and one <br /> from new product line and utility line trenching activities. The total estimated volume of <br /> soil generated was 900 cubic yards from UST and product line removal activities and 100 <br /> cubic yards from new product line and utility line installation. Soil stockpiles were <br /> analyzed (at a minimum)for TPPH,BTEX, and Total Threshold Limit Concentration <br /> (TTLC)lead in order to classify the soils for disposal and meet landfill acceptance criteria. <br /> Soil was transported to Forward Landfill in Stockton, California for disposal. Laboratory <br /> analytical reports are contained in Appendix A. <br /> 10.0 CONCLUSIONS <br /> Soil sampling data collected during excavation and over-excavation activities have <br /> delineated the lateral and vertical extent of petroleum hydrocarbons in soils beneath former <br /> UST's. <br /> Concentrations of TPPH and BTEX compounds identified in the vicinity of the former <br /> northwest fuel dispenser were over-excavated to the extent feasible. Excavation was halted <br /> due to the presence of the canopy column and footing. All remaining samples collected <br /> from the product line trenches and the former fuel dispenser islands were ND for TPPH <br /> and benzene with the exception of sample ST-2, which contained 3.7 ppm TPPH and <br /> 0.011 ppm benzene <br /> Product lines encountered in the northeast corner of the new UST excavation were left in <br /> place as approved by the SJCPHS. All other former generation product lines were <br /> removed and samples collected from former generation product line trenches were ND for <br /> TPPH and benzene. <br /> If you have any questions,please call. <br /> Enviros, Inc.,sy <br /> ann <br /> Greg L. Vaugh <br /> Staff Engineer AoV FEsslay, fy <br /> , <br /> .\. LU,y� <br /> Diane M. Lundquist E. NO. C46725 <br /> Senior Engineer <br /> C46725 �lgTEOFt CARP" <br /> 370 4 <br />