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Bt <br /> - <br /> _61-December 2006:,-'.:- "- -- <br /> - -_ __ - _ S <br /> 4 AGE NC.Project No-. W-0440- <br /> `t AL Page 4 of 6 <br /> ¢s-� 3 _ <br /> T <br /> activ�t�es.-Composite soil sample SPI-4 was collected from the site prior to excavation acflvrtles for ' <br /> i land_ fill soil charatteriz_ation purposes ' . <br /> -TPH g_was detected in all the soil_samples at'concentrat�oris'ranging from_4­3`milligrams per <br /> kiIogratn (mg/kg) in soil sample NF-14-to 80 mg/kg (CB 14)_ TPH=d was`detected in 4 of the soil <br /> samples at concentrations ranging from.90 mg/kg-(B-1.6) to 1;1[00 mg/kg(SP=5=9). Various BTEX. i <br /> . .�. constituents were detected in-all.the'soil samples at:concentrat ons as high.as 0.Y 1-.mg/kg benzene. F <br /> '. <br /> '(BN-16),-0 016'.mg/kg.toluene (SF-15); 16 mg/kg-:{SF-lb) and 8:4F'mg/kg•xylenes (SF 1-5).. Soil <br /> "} 'excayatrorl samples arici concentrations are"depicted'in plane grew inFigure <br /> Three soil samples were submitted for analysis from well MW-2A.No,anal es were.detected in the ` _ } <br /> Yt. <br /> soil samples-collected 'Tables 1 and- coAtain a summary of_soil-analytical results The laboratory_-._-, <br /> reports (CTEL Laboratory Rro�ect_Number Ob06011.an_d 0609216},`:quality assurance and quality <br /> x : _control �.QAI C -re ort:and;ehain-of custod; forms are included`an. A endix D:= Documents .> _ <br /> ( Q ) P Y �¢ .h pp <br /> confirming.the upload`of laboratory.electronic deliverable format`{EDF) files and.sample locations t <br /> - `- F . <br /> to GeoTracker are mcluded'in Appendix'E. ..J <br /> 3.2. MASSNOLUME CALCULATIONS <br /> 41 L <br /> . — - fE• F ' - s <br /> 'The-mass of petroleum hydrocarbons-rerrioved during excavatioria:activrties'=and. the mass of <br /> - remaining hydrocarbons was determined based on analytical results ofsoil samples collected'dilririg <br /> Ale-excavation and',£rom_sof l borings advanced during previous site assessment activities <br /> _:Y ■fie Y-fie . - - ,_ <br /> 3.2.1 Mass of Petroleum.Hydrocarbons Removed <br /> The mass of petroleum hydrocarbons removed'in.soil was:determined on the basis ofthe averaged W <br /> _ <br /> = concentrations of TPH-g in the soil samples collected-from';withiri,;the.:excavat ion area during'. <br /> . - 'excavation and•preyious site asses'smerit activities.AGE's"calcul�ations'estimated that Approximately, - ; <br /> 279 lbs.or.45 gal of gasoline were removed rom'the=site-during' he soil excavation:procedures. The <br /> "mass arid-valume calcillatians are presented iri'Appendix F '- al ' = <br /> 3.2.2 Mass of Petroleum Hydrocarbons Remaining ,� r <br /> x _ - <br /> ' The total distributloii.of adsorbed hydrocarbons:on the site befoie excavation can`be a roxirnated . <br /> - _ Z :. pp . ._x <br /> C by an ellipse.with_an'area of approximately 8;000-_ft...Mass volume calculations indicate,thafthere k <br /> 1 was-approximatelyr750 pounds<or'12D'galIons of'petroleum hydrocarbons adsorbed in the soil . : r -` <br /> n berieath,the site:{Appendix=E)-prior to excavation. Adsorbed soil is de icted_iri lane;.view rn x <br /> - p p <br /> ' <br /> _ -t <br /> T-1 'Advanced GeoEnviro6a e&al,Inc <br /> 14, <br /> PF <br />