_GENERAL DOCUMENTS - C1981017 ‎(287)‎

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Name: Bid Documents ‎(IMP)‎
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STATE. OF COLORADO
Roy Romer,Governor
Patti Shwayder, Executive Director ��pF co�9
Dedicated to protecting and improving the health and environment of the people of Colorado �e
HAZARDOUS MATERIALS AND WASTE MANAGEMENT DIVISION
4300 Cherry Creek Dr.S. 222 S.6th Street, Room 232 \*�876
Denver,Colorado 8022 2-1 5 30 Grand Junction,Colorado 81 5 01-2768
Phone[phone] Phone[phone] Colorado Department
Fax[phone] Fax[phone] of Public Health
and Environment
April 2, 1997
Steven G. Renner
Department of Natural Resources
Division of Minerals and Geology
2148 Broadway, #C-5
Grand Junction, CO 81503
Re: Coal Basin Environmental Site Assessment
Pitkin County
Dear Mr. Renner:
The Hazardous Materials and Waste Management Division (the Division) has received your
January 6, 1997 request for our comments regarding the findings of the site investigation
performed at the above referenced site contained within the final report issued by Harlan and
Associates, Inc. on August 2, 1996. The August 2, 1996 report was reviewed by both the
Hazardous Waste Cleanup and Permitting Unit and the Solid Waste Unit of the Division's
Compliance Program. Our comments and recommendations are as follows:
1) Significant concentrations of hydrocarbon contaminated soils were identified at several
locations in the Coal Basin property Main Yard, including the former underground storage
tanks adjacent to the Truck Shop, east of the former Truck Shop, on the bench south of
the Coal Hoppers, and in the Maintenance Yard. These areas of contamination need to
be remediated since they contain TPH concentrations in excess of standards (remedial
action category I: 20 ppm BETX, 100 ppm TPH) established by another State agency, but
which are also utilized by the Division. Options include excavation and off-site disposal,
or excavation and on-site treatment. If the on-site treatment remediation is selected, a
comprehensive remediation plan must be submitted to the Division's Solid Waste Unit for
review and approval. With regard to the off-site disposal option, the hydrocarbon
contaminated soils may be delivered to any permitted solid waste disposal facility that
chooses to accept this material, whether its CSI in the Denver area or one of the local
landfills in either Pitkin or Eagle counties.
2) The report states that "both surface-water and ground-water quality throughout the area
is good". This conclusion is based on a limited number of samples collected from very
specific areas. Without fully understanding the hydrology of the site, it is impossible to
say whether the water discharging from Seeps 1 through 3 and Seep 4 are representative