PERMFILE52755

• Permit No: M1995097
• IBM Index Class Name: Permit File
• Doc Date: 5/6/1997
• Doc Name: FAX COVER
• From: A CAMPBELL
• To: HARRY P
• Media Type: D
• Archive: No

OS/O6/A7 1:.:18 FAX [phone] CDPFIE 9AZ11AT • X006
Order under which these parties agreed to perform certain studies for EPA
A Remedial Investigation/Feasibility Study (RI/FS) was conducted by Fred C. Hart
Associates, Inc. in March 1986. The recommended remedial action from the selection of two
alternatives was surface sealing (capping) and grading.
D. OUl Summary
In September 1986, EPA produced a Record ofDecision (ROD) which outlined a remedy
for OUl. The remedial objectives of the 1986 ROD were:
a) Removal and disposal of soils and tailings with lead concentrations greater than 5,000 ppm
in an on-site repository,
b) Capping of soils with lead concentrations between 1,000 and 5,000 ppm with 6 to. 12
inches of clean soil and revegetation,
c) C~und water monitoring,
d) Provision of an alternate water supply for residences with domestic wells and,
e) Operation and maintenance of the remedy through regulaz inspections as well as through
land use restrictions, known as institutional controls.
During the OUl Remedial Design (RD), additional technical information showed that the
unexpectedly high volume of soils to betaken off site significantly changed the cost effectiveness
determinations of the Agency.Accordingly, the ROD was modified in the Mazch 1989 ESD.
This ESD described a plan to remove the top two feet of soils containing more than 1,000 ppm
lead in the residential areas and added an additional on-site repository for the extra volu: ne of soil.
However, the Aspen community found the remedy unacceptable.
The Aspen community submitted an alternative proposal which resulted in a second ESD
issued in May 1990. The May 1990 ESD included a greater reliance on local land use restrictions
known as Institutional Controls (ICs) and removal of 6 inches of contaminated soil in the Hunter
Creek and Centennial Condominium areas.
Pitkin County adopted ICs in May, 1991, but they were repealed based upon citizen
concern about the need for any remedy at all. EPA eventually resolved its significant differences
with the Aspen community and developed the course of action refleced in the June 1993 ESD.
PACE No. 4