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Show Kennecott Utah Copper Mem orand um • Janua ry 12, 199/ V Hank Hanss en - - - ---- Subje ct: Arthu r Found ry Slag Dump SURFACE SAMPLES were On Novem ber 30, 1993 five surfa ce soil samp les (O" to 6") in Dump colle cted from the top of the old Arthu r Found ry Slag the d aroun antic ipati on of using the slag as fill in vario us areasthe dump is of e volum ated estim The . ities Arthu r and Magna facil A site map has been betwe en 10,00 0 and 14,00 0 cubic yards . The sampl e locat ions are attac hed in Appen dix A for refer ence. These 5. ident ified on the map as circl ed numb ers 1 throu gh the at SPLP samp les were analy zed for total meta ls, TCLP, and been The resul ts have Kenn ecott Envir onme ntal Labo ratory (KEL) . the eleva ted avera ge of se Becau 1. page B, summ arized in Appen dix 31.74 mg/1 conc entra tions of total and TCLP lead (7350 mg/kg and pile was respe ctive ly), addit ional and deepe r samp ling of the slag mg/1 with a condu cted. The avera ge SPLP resul t for lead was 0.39 range of <0.1 mg/1 to 1.2 mg/1. POTHOLE SAMPLES ber Seven potho les were excav ated into the slag dump on Decem were Soil samp les 8, 1993 to an appro ximat e depth of 4' to 6'. color or horiz on nct disti a ver where colle cted from each potho le The potho le locat ions are indic ated on the chang e was notic ed. A total of 18 samp les were colle cted site map as Pl throu gh P7. comp osite samp le of stock piled dark a from the potho les inclu ding les were analy zed at KEL for total samp soil and a QC samp le. These for the 18 potho le samp les have lts Resu meta ls, TCLP, and SPLP. 2 throu gh 4. pages B, been summ arized in Appen dix and Altho ugh the avera ge potho le conc entra tion of total leadtions entra conc TCLP the ly, ctive chrom ium was 1.4% and 0.5% respe for both were 0.63 mg/1 and 0.05 mg/1. The TCLP regul atory level chrom ium and lead for ts resul lead and chrom ium is 5.0 mg/1. SPLP the TCLP and were 0.07 mg/1 and 0.29 mg/1, respe ctive ly. Based on rial which mate the that SPLP data, it has been deter mined fican t signi no nts prese cons titute s the Arthu r Found ry Slag Dump les samp all for es ficat threa t to the envir onme nt. Anal ytica l certi as hed attac been have regar ding the Arthu r Found ry Slag Dump ARTFOUNO.SUM 01/12/94 JCC |
