Former cement manufacturing left two deposits of cement kiln dust (CKD) at the Holcim Inc site. Investigations showed the CKD had contaminated soil and groundwater.
The cleanup remedy was constructed from July through November 2016. A CKD deposit near the Spokane River was excavated and combined with the other CKD deposit further away from the river. The CKD was then covered with an engineered cap to keep people, wildlife, and precipitation from contacting the contamination.- Holcim Inc. site history, including site ownership, past site use, and the types of contamination that prompted cleanup
- Cleanup actions that were completed to protect people and the environment
Site History
The site was used for manufacturing cement from 1910 to 1967. During that time, CKD was deposited on the site. Soil sample results confirmed one CKD deposit about 109,100 cubic yards in volume on the Holcim property. Another CKD deposit in soil, about 12,300 cubic yards in volume, was on the city property.
The CKD contains various contaminants that exceed state standards, including arsenic, cadmium, and lead. In addition, some CKD deposits were very alkaline with a pH greater than 12.5, which is corrosive and considered dangerous waste if disturbed.
Other areas of the site had soil contaminated with benzene, carcinogenic polycyclic aromatic hydrocarbons, and gasoline.
Cleanup Timeline
On February 13, 2014, during the public comment period for the draft Remedial Investigation and Feasibility Study, Ecology hosted a public meeting to provide an overview of the Holcim Inc site and results of the reports. We discussed soil and groundwater results, the cleanup options, and answered questions. Ecology published a response to comments following the comment period.
Ecology selected a modified alternative 4 in the Cleanup Action Plan, held a public comment period on the draft plan in late 2015, and received one comment. We published our response to comments and finalized the plan without revision.
An engineered cap covers the CKD combined on the Holcim property. The cap includes a 30-mil geomembrane, one foot of drainage material, geotextile, and two feet of topsoil. Native grasses are planted on the cap. All precipitation runoff is collected and managed on Holcim’s property. Institutional controls will be placed on the property to protect the cap and restrict how the property is used. No institutional controls are on the city or Neighborhood, Inc. property because no contamination remains there.
Documents 18
Legal 6
Document Title | Document Date | Document Type |
Consent Decree re: Holcim Inc.Site | 5/1/2015 | Consent Decree |
Holcim Inc Signed Agreed Order | 8/22/2011 | Agreed Order |
Responsiveness Summary for Agreed Order RI/FS | 8/22/2011 | Agreed Order |
Responsiveness Summary Letter for Agreed Order RI/FS | 8/22/2011 | Agreed Order |
Agreed Order for RI/FS Spokane Valley.pdf | 7/8/2011 | Agreed Order |
Agreed Order for RI/FS Holcim | 6/17/2011 | Agreed Order |
Public Information 8
Document Title | Document Date | Document Type |
Holcim Inc - Cleanup Along the Centennial Trail | 7/27/2016 | Fact Sheet\Public Notices |
Responsiveness Summary | Holcim Inc. Site | 10/27/2015 | Responsiveness Summary |
Holcim, Inc. Fact Sheet - Russian | 9/3/2015 | Fact Sheet\Public Notices |
Holcim, Inc. Fact Sheet - Spanish | 9/3/2015 | Fact Sheet\Public Notices |
Holcim, Inc. Site | 9/3/2015 | Fact Sheet\Public Notices |
Responsiveness Summary Holcim RIFS Reports 2014 | 3/18/2014 | Responsiveness Summary |
Fact Sheet Holcim Remedial Investigation Feasibility Study Report | 12/30/2013 | Fact Sheet\Public Notices |
Fact Sheet Agreed Order for Remedial Investigation and Feasibility Study - Holcim Site | 7/21/2011 | Fact Sheet\Public Notices |
State Environmental Policy Act 1
Document Title | Document Date | Document Type |
Determination of NonSignificance (DNS) WAC 197-11-970 | 5/1/2014 | SEPA Documents |
Technical Reports 3
Document Title | Document Date | Document Type |
Holcim Feasibility Study Report | 12/30/2013 | Feasibility Study |
Holcim Remedial Investigation Report 2013 | 12/30/2013 | Remedial Investigation Report |
Holcim (US) Inc Site Hazard Assessment Report | 3/9/2011 | Site Hazard Assessment Report |
Places to see print documents
-
Eastern Regional OfficeN 4601 Monroe StSpokane, 99205-1265Please schedule an appointment to view print documents at this location.
Contaminants 4
Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
---|---|---|---|---|---|---|
Metals - Metals Priority Pollutants | C | C | ||||
Non-Halogenated Organics - Petroleum Products-Unspecified | C | |||||
Non-Halogenated Organics - Polycyclic Aromatic Hydrocarbons | C | |||||
Metals - Arsenic | C |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated