Case Study of Sustainable Remedial Strategy for Treatment of Cement Kiln Dust

Development of a sustainable remedial strategy for cleanup of a contaminated waste can be the most cost effective and efficient plan when site conditions permit and the proposed remedy is compliant with regulatory guidelines and consistent with the responsible party’s goals. Shaw (a CB&I company) was authorized to develop a remedial strategy to manage approximately 145,000 cubic yards of cement kiln dust (CKD) that was stockpiled on prime real estate, zoned for residential development. Numerous waste management strategies were reviewed before selecting two sustainable alternatives. The two sustainable strategies developed to manage CKD deposited at the subject site were:  blend CKD with native soils to provide an enhanced subgrade for roadways and parking areas; and consolidate the CKD into a monofill that will be completed as a community park.

The sustainable strategy reduces the impact to the environment through reuse rather than landfill disposal; mitigates human exposure; and provides a cost-effective method to manage the waste. In this case, cost savings are estimated to be $4M as compared to traditional landfill disposal.

This presentation will detail sustainable strategy and challenges encountered during design.