### r SDM S Documen tI D 203808 8
INITIAL POLRE P I . HEADING DATE : FROM : TO : SUBJECT : POLREP : II . BACKGROUN D Apri l 17 , 199 0

Mik e Zimmerman , OS C Han s J . Crump , Actin g Directo r ER D Midval e Sla g Site , Midvale , Uta h No . 1

Sit e No : 7 1 D.O . No : 7334-08-04 6 Respons e Authority : CERCL A NP L Status : Propose d NP L Sit e Star t Date : Marc h30 , 199 0 Approva l Status : Actio n Memorandumha s bee n approve d b y th e Divisio n Directo r Marc h15 , 199 0 III . INCIDENT INFORMATIO N A . Situation : Th e Midval e Slag Sit e i s located i n Midvale , Utah , approximatel y1 2 mile s sout ho f Sal t Lak e City . Additionally , th e sit e i s locate d alon g th e Wasatc h Fron t i n th e Jordan Rive r Valley , whic hi s a flat , sediment-file d valle ysurrounde d b yth e fault-bloc k Wasatc hMountains . Portion s o f th e sit e li e i n th e floodplai n o f th e Jorda n River . Th e sit e consist s o f abou t tw o (2 ) millio n ton s o f sla g fro ma forme r coppe r and lead smelting facilit yo n a n are a o f abou t 33 0 acres . Th e smelte r wa s operate d from 190 2 unti l 195 8 b yU.S . Smelting , Refining , and Minin g Company(late r know n a s U V Industries) . Ove r th e year s th e smelte r wa s change d fro ma coppe r t o a lead smeltin g facilit yproducing gold-lead-silve r bullio n fromsulfid e ores . A

n arsenic-recoveryplan t wa s als o par t o f th e smeltin g proces s include d sla g and dross ; wherea s th e principa l wast e end-produc t o f th e arseni c recovery proces s wa s baghous e dust . Th e volum e o f baghous e dus t and dros s hav e bee n estimate d a t 40 0 and 44,10 0 cubi c yards , respectively . Th e propert ywa s purchase d i n 196 4 byValle yMaterial s Corporatio n (VMC) , wh o market s th e sla g material s lef t o n site . Blackhaw k Sla g Product s operate s th e sit e fo r recovering and processing th e sla g fo r us e a s material s fo r railroa d bed s and asphal t highwa yconstructio n an d a s a sandblastin g abrasive . Th e sit e i s onl ypartiall yfenced .B . Typ e o f Indicant : Fro mpreviou s smelte r operation s abundan t concentration s o f lead , arsenic , cadium , copper , silver , chromium , an d zin c ar e containe d i n th e slag , dross , and baghous e dus t found foun d o n site . Th e primar yconstituent s o f concer n fo r thi s Remova l Actio n ar e arseni c and lead found i n th e dross . C . Preliminar yAssessmen t Results : APreliminar yEndangermen t Assessmen t byth e Agenc yfo r Toxi c Substance s and Diseas e Registry(ATSDR ) wa s prepare d fo r EPA . ATSDRrecommende d complet e restrictio n o f th e sit e du e t o a publi c healt hconcern . EP Aconfirme d th e ATSD R recommendatio n tha t th e sit e shoul d b e fence d base d o n th e hig hconcentration s o f arseni c (+10,00 0 ppm ) an d lead (+7,50 0 ppm ) withi n th e dros s materia l o n th e surfac e o f th e site . IV . RESPONS E INFORMATIO N A . Statu s o f Actions : AnACTIO NMEMORANDU Mfo r installin g a fenc e t o secur e th e are a wa s approve d by8HWMo nMarc h15 , 1990 . Th e curren t projec t ceilin g i s $225,250 . Adeliver yorde r wa s issue d 't o ERG S Zon e 4 contracto r o nMarc h29 , 1990 . O nMarc h30 , 1990 , th e ERG S Respons e Manage r an d th e EPAOS C rendezvouse d o n sit e t o initiat e th e Removal . Sit e wor k bega n a t approximatel ya t 4:0 0 p.m . a s ERG S establishe d a n outpos t fo r th e securit yguard s t o provid e sit e surveillance . Phas e I constructio n wil l begi n wit h repair s t o th e fenc e borderin g th e souther n and easter n boundarie s o f th e 1 1 acr e site . Fencin g i nthi s .are a o f th e sit e border s propert yowne d b ySharo n Stee l Corp . Phas e I I wil l consis t o f repair s t o existin g fenc e borderin g propert yowne d and operate d b yValle yMaterial s plu s installatio n o f ne wfencing , a s appropriate , fo r th e remainde r o f the site . Phas e I I i s dependen t on negiotation s wit hth e prim e PRP , Valle yMaterials . Th e consummatio n o f a nAO C wit hValle yMaterial s wil l lead , t o a nEnforcemen t Lea d Removal . Failur e t o clos e o nth e Orde r wil l mea n th e continuatio n o f th e Remova l a s a Fun d Lead . EPA-OS C obtaine d a sit e acces s agreemen t fro mSharo n Stee l o nMarc h29 , 1990 , coverin g thei r 1 1 acres . Sharo n Stee l decline d t o participat e i n th e Removal . Permanen t acces s t o th e VMC propert yis . contingen t o n curren t negiotation s ove r th e AOC .

### Shoul d VM C declin e constructio no f thei r

portio no f th e fence , EP Awil l pursu e access , eithe r throug hPR P consen t o r Cour t Orde r and finis hth e Remova l

B . Nex t Steps : Negiotation s wit hth e PR P ar e i nprogres s and closur e i s expecte d i nth e ver ynea r future . Se e abov e discussio n fo r planne d fencin g agenda . IV . COS T INFORMATIO N

Cleanu p Contractor s TAT/BO R Intramura l (H Q & Region ) CONTINGENC Y Amoun t Budgete d 

### $ 160 , 

### 25 , 12 , 27 , 00 0 00 0 50 0 75 0 Cos t

T o Dat e $7,00 0 6,00 0 4^00 0 

### -0

- Amoun t

Remainin g $153 , 

### 19 , 8 , 

### 27 , 00 0 00 0 50 0 75 0

TOTAL $225,25 0 $17,00 0 $208,25 0

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### I SSI D F Cas e # COPIE S TO BE SEN

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