UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y

REGIO N VII I

• 999 18th STREET - SUITE 500

DENVER , COLORAD O 80202-2466 ADMINISTRATIV E RECORD

FINAL POLLUTION REPORT OfTM ril P" ft Zi ii sr»r-r*

Midvale Slag OU 2 bjT FIL E NUMBE R Butterfield Lumber *z-n o)

I. HEADING

Date: 07/7/97 Subject: Midvale Slag NPL Site (OU2) Butterfield Lumber From: Mike Zimmerman, OSC T o: Anne Spencer, EPA Headquarters

Emergency Response POLREP No.: POLREP #2 and Final

II. BACKGROUND

Sit e No. : 71 CERCLIS No: UTD081834277 Response Authority: CERCLA State Notification : UDEQ Notified Action Memorandum: 09/23/9 6 Start Date: 10/09/96 Completion Date: 6/30/97

III . SIT E INFORMATIO N

A. Incident Category

Time-Critical , NPL

B. Sit e Description .

1. Sit e Description

T he entire Midvale Sla g site consists of about 530

acres; OU2 covers about 200 acres of the Site. A smelter

operated on OU2 from 1897 until 1958. Over the years, it

changed from a copper to a lead smelting facility , producing

gold/lead/silve r bullion from sulfide ores. Thi s Removal Action will address the need to mitigate the threat of

contamination of the air, surface and ground water posed by

lead and arsenic present in the slag, dross, and dust from a former copper and lead smelting operation. A significan t

potential for continued human/animal exposure to hazardous

substances exists. Thi s is evidenced by l) direct access by

Primed on Recycled Paper
employees and patrons to the areas of the Sit e where

hazardous substances exist, and 2) airborne migration of

hazardous substances from the Site .

2. Description of Threat

The Site is used by workers and patrons of the lumber

operation. The semi-arid climate of the area provides a

situation for the hazardous substances and/or contaminants

on-site to be airborne and migrate off-sit e during the dry,

windy days. Arsenic and lead were found on-site at elevated

levels.

C. Sit e Evaluation Results

During the Remedial field investigation effor t of 1995, the Butterfield Lumber property was sampled. The results indicated a

need for Removal Action , plus the necessity to perform further

site characterization.

I V . RESPONSE INFORMATION

A. Situatio n

On October 9, 1996, the EPA ERCS Contractor mobilized to the Site and began to dismantle the property fence and prepare the Sit e for ful l mobilization beginning on October 14, 1996. On October 15, 1996, the excavation was initiated by a crew of six

cleanup technicians, a field clerk, response management, and an

industrial hygienist. Excavated material was transported to OU2

and stockpiled in a temporary storage area. Dust suppression for

the stockpile was provided by a water truck, and a fire hydrant

hose was used to suppress dust from the excavating machinery. Surfactan t was used to cover the stockpile at the end of each

workday. Sit e work was completed and the crew demobilized on June 30, 1997.

V. COST INFORMATION Amount Costs Budgeted To Date

ERCS Contractor $236,000 $226,000 IA6 $ 10,000 $ 10,000

EPA S 37.000 6 10,000

Estimated Final Cost s $283,000 $246,000

The above accounting of expenditures is an estimate based on

figures known to the OSC at the time this report was written. The cost accounting provided in this report does not necessarily

represent an exact monetary figure which the government may

include in any claim for cost recovery.
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If you have questions or a problem receiving this POLREP,

please call me at (303)312-6944 fax NO 312-6071. Thank you.

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Updated 6/9/97