HomeMy WebLinkAboutOLD TOWN NORTH - Filed GC-GENERAL CORRESPONDENCE - 2009-04-10BILL RITTER, JR
Governor
DONALD J. MARES
Executive Director
RICHARD O. PIPER
Director of Oil and Public
Safety
July 11, 2007
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DEPARTMENT OF LABOR AND EMPLOYMENT
Division of Oil and Public Safety
Remedlation Section
633 171H Street, Suite 500
Denver, Colorado 80202-3660
(303) 318-8500; Fax (303) 318-8546
Website: http://oil.cdle.state.co.us
RECEIVED
iU L 2007 (
DR ANDREW FLURKEY
COLORADO DEPARTMENT OF TRANSPORTATION
PROPERTY MANAGEMENT SECTION
15285 SOUTH GOLDEN ROAD BLDG 47
GOLDEN CO 80401
Re: Underground Storage Tanks (USTs) at CDOT Fort Collins #7733, 610 East Vine Drive, Ft. Collins,
Larimer County, Colorado. (Event ID 3220)
Dear Dr. Flurkey:
The Division of Oil and Public Safety (OPS) has reviewed the December 2006 Quarterly Groundwater
Monitoring report for the above referenced site received June 4, 2007.
Based solely upon the information submitted it appears you have removed the source of contamination and
reduced the potential for endangerment to human health, safety, and the environment as a result of the
contamination at this properly.
Soil is present onsite with a concentration of benzene of 0.410 mg/Kg (measured on April 21, 2005). This
concentration is in excess of the risk based screening level (RBSL) for benzene in soil of 0.26 mg/Kg. The
results of a Tier 2 soil leaching to groundwater model, performed using site -specific data, is consistent with
site observations indicating that contamination above the RBSL will not migrate beyond the property
boundary in the future.
In light of the remedial action taken at this site, and the confirmatory modeling results, OPS does not
require any further investigation or remedial action at this time. OPS cannot release you from any
liability that may be associated with any contamination at or from this site. If the function of the
property is modified for a different use and the new business does not dispense petroleum
products, the OPS must be contacted immediately. This no further action (NFA) letter is in reference to
the conformed release reported at the site on November 30, 1989.
Please address correspondence regarding this site to me, and if you have any questions cail me at (303)
318-8540.
Sincerely, --
Vinny Sedondo, P.G.
Environmental Protection Specialist
Remediation Section
cc: Greg Johnson, P.G., Remediation Section Unit Supervisor
Peter Barkmann, Colorado Geological Survey, 1313 Sherman Street, Room 715,
Denver, CO 80203