Region 8
Superfund Program
National Information
Regional Information
Site Information
National Priorities List (NPL) History
Proposed Date
6/24/1988
Final Date
8/30/1990
Chemical Sales Co.
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Site Type: Final NPL City: Denver County: Denver Street Address: 4661 Monaco St. Zip Code: 80216 EPA ID: COD007431620 Site ID: 0800866 SSID: 0887 Site Aliases: Dahlia NPL Staging Congressional Districts: 1, 7 |
Site Description
The Chemical Sales Co. site covers about five square miles in a mainly light-industrial area of northeastern Denver. The company was a wholesale distributor of commercial/industrial chemicals, detergents and water leisure products.
Groundwater studies by EPA led to the discovery of the site as a source of volatile organic compound (VOC) contamination in the area. The 1990 Risk Assessment showed that use of the contaminated groundwater for drinking, cooking or bathing could increase the chance of developing cancer. Breathing indoor air poses a potential risk if residents use the contaminated water for showering, bathing or cooking.
The next five-year review is due by the end of 2012.
EPA proposed Chemical Sales Co. site for its National Priorities List (NPL) in June 1988 and finalized the listing in August 1990.
Site Risk
| Media Affected | Contaminants | Source of Contamination |
| groundwater, air, soil, liquid waste, solid waste | DCA, DCE, total 1, 2-DCE, TCA, TCE, PCE, BZ, VC | distributor of commercial/industrial chemicals, detergents and water leisure products |
Cleanup Progress
These cleanup activities have been completed:
- Connection of over 400 residences to the South Adams County Water and Sanitation District (SACWSD) municipal supply in 1986, 1992 and 1995.
- Construction of the Klein Treatment Plant for SACWSD in 1989.
- Removal of leaking and corroded drums from the Chemical Sales Co. property in 1989.
- Construction of an air sparging/soil-vapor extraction system in 2000 to clean up the source area.
Current operations and maintenance (O&M) activities include operating the system and monitoring groundwater throughout the site.
Community Involvement
Community comment was solicited for the five-year review completed in August 2007.
Site Documents
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
Annual Update to the Five-Year Review, July 2011 (PDF, 1 pg, 21K)
Third Five-Year Review Report, August 2007 (PDF, 65 pp, 3.6MB )
Explanation of Significant Differences (OU1), March 27, 2000 (PDF, 17 pp, 253K)
Record of Decision Amendment (OU4), September 23, 1999 (PDF, 31 pg, 190K)
Explanation of Significant Differences (OU2), November 29, 1994 (PDF, 5 pp, 15K)
Record of Decision (OU4), December 29, 1992 (PDF, 23 pp, 49K)
Record of Decision (OU1), June 27, 1991 (PDF, 28 pp, 66K)
Record of Decision (OU2), June 27, 1991 (PDF, 29 pp, 74K)
Record of Decision (OU3), June 27, 1991 (PDF, 30 pp, 75K)
Contacts
EPA
Armando Saenz
Superfund Project Manager
U.S. Environmental Protection Agency, Region 8
1595 Wynkoop Street (8EPR-SR)
Denver, CO 80202-1129
303-312-6559
800-227-8917 ext. 312-6559 (toll free Region 8 only)
saenz.armando@epa.gov
John Dalton
EPA Community Involvement Coordinator
U.S. Environmental Protection Agency, Region 8
1595 Wynkoop Street (8OC)
Denver, CO 80202-1129
303-312-6633
800-227-8917 ext. 312-6633 (toll free Region 8 only)
dalton.john@epa.gov
CDPHE
Jeannine Natterman
State Community Involvement Coordinator
Colorado Department of Public Health and Environment
Hazardous Materials and Waste Management Division
4300 Cherry Creek Drive South B2
Denver, CO 80246
303-692-3303
888-569-1831 ext. 3303 (toll-free)
jeannine.natterman@state.co.us
Fonda Apostolopoulos
State Project Manager
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South
Denver, CO 80246-1530
303-692-3411
888-569-1831 ext. 3411 (toll-free)
fonda.apostolopoulos@state.co.us
View Documents at:
Colorado Department of Public Health and Environment
HMWMD Records Center
4300 Cherry Creek Drive South
Denver, Colorado 80246-1530
303-692-3331
888-569-1831 (toll free)
303-759-5355 FAX
M–F, 8 a.m.–Noon and 1:00 p.m.–5:00 p.m.
Appointment is recommended
EPA Superfund Records Center
1595 Wynkoop Street
Denver, CO 80202-1129
303-312-6473
800-227-8917 ext. 312-6473 (toll free Region 8 only)
M-F, 8 a.m.–4:30 p.m.
Appointment is recommended
Links
Chemical Sales Co. site at CDPHE Hazardous Materials and Waste Management Division
