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March 3Q 2009 <br /> ' HWA Project No. 2009-030-21 <br /> and specificatiun�)should includc ali analytical results und provisions for contaminated <br /> soil hundling, trculmenUdisposal,mid health and sefety requiremcnts. Net export or <br /> unsuitaole soil excavatcd for.construction that does not conbiin contaminants excecding <br /> cleanup levcls may still requirc treatment or disposal nt a licensed(i.e., Rcsource <br /> Conscrvation and Recovcry Act(RCRA)Suhtitie D)facility,as many fill sites will not <br /> accept soils with detcctable concentrations of contaminants. If excnvated muterials nre <br /> disposed off-site,property owncrs ut thc recciving site should bc notificd of the results of <br /> 'y tliis study�+nd any additional testing inform�tion availablc at that time. Criteria for <br /> ' unrestricted usc of soils may bc lowcr lhan some cleanup levels. Soils wi4�contaminant <br /> concentrations above dctection limits hut bclow cleanup levels sliould not be used as fill <br /> ncar surface or ground wntec <br /> 3.5.2 I�calth and Sefety <br /> We recommend that nppropriatc hcalth and safcty mcasures Ue taken during nxcavation in <br /> flrens where contaminutcd soils,ground water,or vapots tnay bc present. 7'hese measures <br /> muy include,but arc not limited to,prepnrnlion of a site spccific henith and sufcty plan, <br /> air monitoring,sitc control/acccss,prolectivc and dcconlnmination mcfisures,wo�ker <br /> trnining,ccrtification,and medical munitoring. We recommend an industrial hygicnist or <br /> l�calth and safcty spccialist be consultcd to detenuinc thc npplicability of thcsc <br /> requiremcnts. Construction spceifications should inciude nll availablc analytical results <br /> including this end othcr availnhle;reports <br /> 3.G S(TF.I;ARTII\VORK�RF,COM1iD1E�UATIONS <br /> 3.6.1 Structurnl Fill hfnterials anJ Compaction <br /> For thc pi�rpose of this repoii,any male�ial placed directly wider structures is dcfined as <br /> structural 1iIL Imported structurnl fll should consist of clean, frce-draining sand und <br /> gravcl which is frec from organic m�ttcr or other deleterious materials. Acceptablc <br /> sln�cturll fill would include Gravcl I3on•ow or Sclect I3orrow,�s describcd in Section <br /> 9-03.14(1)and (2),r8spcctivcly,of thc WSllOT Sfn�tdnrrt Specificntiu��s. <br /> Sh•ucturnl fill soils should be placed in loose, I701'1'LOI1SflI IIRS IL`SS tllAll H I11CIlC5 tl] <br /> ihickncss und compncled to n dense nnd unyielding condition,a�id at Icust 95 petroent of <br /> lhe mnximum dry density, as detcnnincd using test method AS'I'M D 1557 (Modificd <br /> Proctor). At thc timc of placemcnt,thc moisture contcnt of thc fill soils should be at or <br /> ncar optimum. '1'he proccdurc to achieve the spccificd miniiuum rclative compaction <br /> depends on lhe size and type of compucting equipment,Uic numbcr of passes,thickncss <br /> of the Inycr Ucing compacted,und cerinin soil Propertics• <br /> 2009-OJO-21 Umll c0a 1 O HWA GFASCIL•NCES MC <br /> / � <br />