### UNITE D

STATE S ENVIRONMENTA L

PROTECTIO N AGENC Y REGIO N VII I • 99 9

18t h STREE T - SUIT E 50 0 DENVER
, COLORAD O 80202-246 6 

# ADMINISTRATIV E RECOR D FINA L POLLUTIO N REPOR T Of TM ri l P " f t Z i i i sr»r-r * 

### Midval e Sla g OU 2 bj T FIL E NUMBE R Butterfiel d Lumber *z-n

o ) I

. HEADIN

G 

### Date : 07/7/9 7 Subject : Midval

e Sla g NP L Site (OU2 ) Butterfiel d Lumber From : Mik e

Zimmerman
, OS C T o : Ann

e Spencer
, EP A Headquarter s Emergenc y Respons e POLRE P No. : POLRE P # 2 and Fina l II

. BACKGROUN

D Sit e No. : 7 1 CERCLI S No : UTD08183427 7 

### Respons e Authority : CERCL A Stat e Notification :

UDE Q Notified Actio n Memorandum : 09/23/9 6 Star t Date : 10/09/9 6 Completio n Date : 6/30/9 7 III

. SIT E INFORMATIO N 

### A

. Inciden t Categor y Time-Critical
, NP L B

. Sit e Descriptio n . 1

. Sit e Descriptio n T h e entir e Midval e Sla g sit e consist s o f abou t 53 0 acres ; OU 2 cover s abou t 20 0 acre s o f the Site

. A smelte r operate d on OU 2 fro m 189 7 unti l 1958

. Ove r the years , i t changed fro m a coppe r t o a lea d smeltin g facility , producin g gold/lead/silve r

bullio n fro m sulfid e ores
. Thi s Remova l Actio n wil l addres s th e nee d t o mitigat e th e threa t o f contaminatio n o f th e air , surfac e an d groun d wate r pose d b y lea d and arseni c presen t i n the slag , dross , and dus t fro m a forme r coppe r an d lea d smeltin g operation

. A significan t potentia l fo r continue d human/anima l

exposur e t o hazardou s substance s exists

. Thi s i s evidence d b y l ) direc t acces s b y

Primed on Recycled Paper

### employee s

an d patron s t o th e area s o f th e Sit e wher e hazardou s substance s exist , an d 2 ) airborn e migratio n o f hazardou s substance s fro m th e Site

. 2

. Descriptio n

o f Threa t The Sit e i s use d b y worker s and patron s o f the lumbe r 

### operation

. Th e semi-ari d climat e o f th e are a provide s a situatio n fo r th e hazardou s substance s and/o r contaminant

s on-sit e t o be airborne an d migrat e off-sit e durin g th e dry , 

### wind y days

. Arseni c an d lea d wer e foun d on-sit e at elevate d levels

. C

. Sit e Evaluatio n Result s Durin g th e Remedia l fiel d investigatio n

effor t o f 1995, th e 

### Butterfiel d Lumber propert y wa s sampled

. Th e result s indicate d a nee d fo r Remova l Action
, plu s th e necessit y t o perfor m furthe r sit e characterization

. I V

. RESPONS E INFORMATIO N 

### A

. Situatio n O n Octobe r 9, 1996 , th e EP A ERC S Contracto r mobilize d t o th e 

### Site an d bega n t o dismantl e th e propert y fenc e an d prepar e th e Sit e fo r ful l mobilizatio n

beginnin g o n Octobe r 14 , 1996

. O n 

### Octobe r 15 , 1996 , the excavatio n wa s initiate d b y a cre w o f si x cleanu p technicians ,

a fiel d clerk , respons e management , an d a n 

### industria l hygienist

. Excavate d materia l wa s transporte d t o OU 2 an d stockpile d i n a temporar y storag e area . Dus t suppressio n fo r th e stockpil e wa s provide d b y a wate r truck , an d a fir e hydran t hos e wa s use d t o suppres s dus t fro m th e excavatin g machinery

. Surfactan t wa s use d t o cove r the stockpil e at the en d o f eac h workday

. Sit e wor k wa s complete d and th e cre w demobilize d on Jun e 30, 1997

. V

. COS T INFORMATIO N Amoun

t Cost

s Budgete d T o Dat e ERC S Contracto r $236,00 0

$226,00 0 IA 6 $

10,00 0 $ 10,00 0 EP A S

37.00 0 6 10,00 0 Estimate d Fina l Cost s $283,00 0

$246,00 0 Th e abov e accountin g o f expenditure s i s an estimat e base d on figure s know n t o the OS C at the time thi s repor t wa s written

. Th e cos t accountin g provide d i n thi s repor t doe s no t necessaril y represen t a n exac t monetar y figur e whic h th e governmen t ma y includ e i n an y clai m for cos t recovery .REGIO N V mSTAT E AGENC Y RRT CONTACT S POLRE P DISTRIBUTIO N FA X SHEE T

TO : SE E LIS T BELO

W

FROM : AM Y MORALE S
Page s t o follow:

. / ? : " Ig

. Date : JU L >CI99 7

Comment s
_J

- Pa^rg- p ^ 0 Pol^- e ^ ^ - F \T\e.l

. G-o_\ \ T ' Oi l S i i f

. S f , n \o L

I f yo u hav e question s o r

aproble mreceivin g thi s POLREP , pleas e cal l m e a t (303)312-694

4 fa x N O 312-6071

. Than k

you .

itev e Gunderson ) "- 1 -—-'Bardslle

j o mEUerhof

f i mGree n Staige r ef f Burges s Bannt

jkeJSchafersui^ )

wrenc e Robinsp

j oh n Helle r j er aSchmil f Ro n LJI...—

.

. Am y Krit?

_ ^03-7 8 303-273-1795) 406-444438 6 J406-444-6965 ] 701-328-2UJT ' 701-328-520

0 73-6fi35 ^ Shan e Is m

-777-597 3 -635-6017 ( 1,703-235-483

7 «4-539-2659 > i7 > eve n M o

Ji mKeiffe r ober t Stewar t 1 fRo n William s / I Ann e S|iencer_

_ 7 d l Taylo r

" 1

" avi d Runyan J oii g Strohbeh m Trac y Sondee n sta n Ki oi l Ijenr y Rya n 208-526-7 2

1303-236-801 ^ 303-969-6967^ I7Q3-6B3-910

0 1-536-424 2 816426-327 0 , 402-697-254

7 f •235-4857 ( 303-844-201!»

r

Update d 6/9/9 7