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i%eprevulence of hea y metal soil contamination at Army jkilitiesposes a serious threat to human health and the enuimnment. To addresli t h k p m b h , the US Army Engineer Warnays ,?ixpenment Station in Vkkbulg, MS is &wbping a mobilepilotscale soil washing treatment facilicv that can be used to m o v e k f i u m the conturnid&. To s q p t t h k w , labora-tolystudi63 rn conducted on both acid and chehting agents to mluate their ability in extracting hea y metak. from contarniwted soils. Eight soils contaminated with lead> cadmium, and chromium uwe s e k k d for use in thissluay. Contaminant concentrations i?t the various soils ranged from 4,00030,000 m& W , 401,oOO rn&g uidmium, and5@4@Wm@ chmmium. 7be muk indicated that, before a@-scule clean-tlp is initiated, a prelimina y investigation is needed to detmineprincipl contaminants of concern, their concentrations, and soil [ype followd by twatubility studits to htermine optimal reagent and concentraions o f r w m f i r cleanq. Sjzxfz m & M this d y d o i n d d that Ckl was the tmkt metul to m h soils followed by Pb and Cr. irhe m L % ako mgg& thd the stmg a d s and chelating agents u.m hoth effiiw sctracting a m , and the lattergmup of compounds may he more uwjid in soil wurhing because they are less harmful to the soil environment. Finully, higher initial concentrations of metal contaminants in the soil themgem.

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