SDMS Document ID

I. HEADING

DATE:

FROM:

TO:

SUBJECT:

POLREP:

II. BACKGROUND

FINAL POLREP

January 15, 1991

Mike Zimmerman, OSC

Steve Luftig, Director ERD

Midvale Slag Site, Midvale, Utah

Final

2038090

Site No: 71

D.O. No: 7334-08-046

Response Authority: CERCLA

NPL Status: Proposed NPL Site

Start Date: March 30, 1990

Approval Status: Action Memorandum has been approved by

the Division Director March 15, 1990

Action Memorandum Amendment has been

approved on December 7, 1990 - Ceiling

Increase

III. INCIDENT INFORMATION

A. Situation:

The Midvale Slag Site is located in Midvale, Utah,

approximately 12 miles south of Salt Lake City.

Additionally, the site is located along the Wasatch

Front in the Jordan River Valley, which is a flat,

sediment-filed valley surrounded by the fault-block

Wasatch Mountains. Portions of the site lie in the

floodplain of the Jordan River.

The site consists of about two (2) million tons of slag

from a former copper and lead smelting facility on an

area of about 330 acres. The smelter was operated from

1902 until 1958 by U.S. Smelting, Refining, and Mining

Company (later known as UV Industries). Over the years

the smelter was changed from a copper to a lead smelting

facility producing gold-lead-silver bullion from sulfide

ores. An arsenic-recovery plant was also part of the

smelting process included slag and dross; whereas the

principal waste end-product of the arsenic recovery

process was baghouse dust. The volume of baghouse dust

and dross have been estimated at 400 and 44,100 cubic

yards, respectively. The property was purchased in 1964

by Valley Materials Corporation (VMC), who markets the

slag materials left on site. Blackhawk Slag Products

operates the site for recovering and processing the slag

1
for use as materials for railroad beds and asphalt

highway construction and as a sandblasting abrasive.

The site is only partially fenced.

B. Type of Indicent:

From previous smelter operations abundant concentrations

of lead, arsenic, cadium, copper, silver, chromium, arid zinc

are contained in the slag, dross, and baghouse dust found

found on site. The primary constituents of concern for this

Removal Action are arsenic and lead found in the dross.

C. Preliminary Assessment Results:

A Preliminary Endangerment Assessment by the Agency for

Toxic Substances and Disease Registry (ATSDR) was prepared

for EPA. ATSDR recommended complete restriction of the site

due to a public health concern. EPA confirmed the ATSDR

recommendation that the site should be fenced based on the

high .concentrations of arsenic (+10,000 ppm) and lead

(+7,500 ppm) within the dross material on the surface of the

site.

IV. RESPONSE INFORMATION

A. Status of Action:

Subsequent to the start of on-site activities the project

EPA attempted to involve the prime PRP, VMC, in the Removal

Action. VMC was reluctant to participate. VMC questioned the

legitimacy of the EPA action based on the assumption that the

contaminants were not bio-available to the general populace.

VMC contended that soil particles were of a size too large for

ingestion or absorption. Consequently, EPA conducted selective

soil sampling on the site on May 14-15, 1990, to determine the

availability of contaminants (lead and arsenic) through soil

particles less than 100 mesh size. The results of that sampling

effort were tendered by TAT on July 9, 19'90, in the form of a

revised PEA recommending fencing of the entire site. EPA

toxicologist, Dr. James LaVelle, concurred with the

recommendation on September 27, 1990.

In addition, Matthew Cohn, Office of Regional Counsel,

conferred with counsel from the PRP's, and it was agreed that EPA

would not seek an Administrative Order, either by Consent of

Unilateral, to pursue the fencing. Negiotations were sentative

at that point (August 23, 1990) over the pending RI/FS. The

project would remain a Fund Lead effort. A final access

agreement to the property was executed on November 1, 1990.

ERCS was mobilized, in full force, to the site on November

7, 1990. Construction began in ernest as the OSC desired
completion of the fence before frost penetration. Overtime was;

authorized for ERGS and the OSC utilized the oversight services;

of BOR to monitor the effort of ERCS. A final inspection was

conducted on December 11, 1990, and the fence was deemed

substantial complete. Minor ancilliary construction was

completed subsequent to December 11, 1990, and the fence was

accepted by 8HWM-ER on December 14, 1990.

An ACTION MEMORANDUM AMENDMENT for for a ceiling increase

was initiated to cover the additional unanticipated costs due to

the prolonged requirement for 24 hr/day guard service and the

accelerated construction schedule. The final anticipated costs

are as reflected in the below budget figures.

B. Next Steps:

Reconcilation of final project costs and preparation of

OSC Report.

IV. COST INFORMATION

CURRENT

CEILING

COST

TO DATE

ERCS

BOR

TAT

Subtotal Extramural Cost

Contingency

TOTAL EXTRAMURAL COST

Intramural Costs

EPA Direct Cost

EPA Indirect Cost

TOTAL INTRAMURAL COST

(HQ & Region)

$310,000

$25,000

$15,000

$350,000

$12,250

$362,250

$20,000

$30,000

$50,000

$289,200

$22,500

$13,000

$324,700

$324,700

$20,000 (Est)

$30,000 (Est)

$50,000

TOTAL PROJECT BUDGET $425,250 $374,700
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