Laserfiche WebLink
E <br /> 27 May 2004 <br /> AGE-NC Project No 96-0254 - <br /> Page 4 of 6 <br /> 34 2 Soil Stockpile Samples <br /> TPH-g was detected in the five composite soil stockpile samples at concentrations ranging from <br /> 10'mg/kg to 13 mg/kg Vanous'concentrations of BTEX constituents were detected in the same <br /> r samples at concentrations as high as 0 44 mg/kg benzene, 0 44 mg/kg toluene, 0 97 mg/kg <br /> ethylbenzene and 1 94 mg/kg,total xyleries In addition, MTBE was detected in two composite soil <br /> r samples at concentrations of 0 615 (SP-13, 14, 15, 16) and 0 011 mg/kg (SP1 7, 18, 19, 20) -Other <br /> fuel additives and lead were not detected above laboratory reporting limits in any of the samples' <br /> analyzed <br /> rBased on relatively high OVM readings, AGE had anticipated higher detected concentrations of <br /> analytes in the composite soil samples To confirm the OVM readings, one individual soil sample= <br /> r from each composite sample (SP-01, SP-05, SP-09, SP-13 and SP 17) was analyzed as described in <br /> Section 2 3 TPH-g was detected at concentrations ranging from 86 mg/kg to 3,300 mg/kg BTEX <br /> 'constituents were detected at concentrations as high as 1 5 mg/kg benzene, 3 0 mg/kg, 33 mg/kg <br />' ethylbenzene and 197 mg/kg total xylenes <br />'. 3 1 3 Overburden Soil Stockpile Samples <br /> r TPH-g, fuel additives and lead were not detected in the two composite overburden soil stockpile <br /> samples Toluene and p-xylene was detected at low concentrations in the two samples Tables 1 <br /> and 2 contain a summary of soil stockpile analytical results The laboratory reports (CTEL <br />' LaboratoryIDs 0312-064-1 and-5),quality assurance and quality control(QA/QC)report and chain- , <br /> `of-custody forms are included in Appendix C ` <br /> t <br /> E <br />' 3 2 VOLUME/MASS CALCULATIONS <br />' The mass of petroleum hydrocarbons removed during excavation activities and the mass of <br /> remaining hydrocarbons was determined based on analytical results of soil samples collected during <br /> the excavation and from soil borings advanced during previous site assessment activities <br /> 3 2 1 Mass of Petroleum Hydrocarbons Removed - <br /> The mass of petroleum hydrocarbons removed in soil was determined on the basis of the averaged <br /> concentrations of TPH-g in the soil samples collected from within,the excavation area during <br />' excavation and previous site assessment activities A cross-section of impacted soil is depicted in` <br /> rAdvanced GcoEnvironment$1,Inc_ <br /> r s <br />