Record of Decision System (RODS)
PORTLAND CEMENT (KILN DUST 2 & 3)
|Site Name:||PORTLAND CEMENT (KILN DUST 2 & 3)|
|Address:||1000 SO. REDWOOD ROAD|
|City & State:||SALT LAKE CITY UT 84116|
|NPL Status:||Currently on the Final NPL|
|Contaminant:||Lead, arsenic, chromium|
Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.
The Portland Cement Co. site is located in Salt Lake City, Utah within a triangular area defined by Indiana Avenue, Redwood Road, and the Jordan River Surplus Canal. The 70 acre site is a former dumping ground for cement kiln dust (CKD) and chromium-bearing kiln bricks, by-products of the cement manufacturing process. There is an estimated 500,000 cubic yards of CKD and 360 tons of chromium-bearing bricks at the site.
The ROD sets forth the modified selected remedy for the Portland Cement Co. site. During the Remedial Design (RD) of the remedy, new information was received which prompted a reevaluation of the original combined remedy.
The original remedy involved removal and off-site disposal of CKD in a landfill constructed specifically for site waste. Co-disposed chromium bearing bricks would be separated from the CKD and temporarily stored on site. Co-disposed, non-hazardous materials at the site, such as construction debris, would also be removed and disposed of in the landfill with the CKD.
The landfill would be located in the general vicinity of the Salt Lake Valley Landfill in Salt Lake County. It would be constructed as an industrial waste, double-lined landfill equipped with leak detection. The landfill would have a layered cover system with a synthetic membrane and a six foot chain link fence to provide security.
Site soils contaminated above the action levels would be excavated. Contaminated soils that exhibit characteristics of hazardous waste would be treated on site. The stored chrome bricks at the site would also be treated on site.
Following removal activities, the entire site would be covered with a minimum of 18 inches of clean backfill.
Groundwater at the site would be monitored both before and after removal of the CKD and contaminated soils. The purpose of this monitoring would be to assess the need for groundwater remediation in the future.
If necessary, institutional controls in the form of deed restrictions would be imposed. These controls would be designed to control, as necessary, future groundwater and land use at the site.
Operations and maintenance of the remedy would include: routine inspections of the new landfill site; maintenance, as necessary, of the new landfill cap and the 18 inch soil cover; and annual monitoring of the groundwater quality surrounding the new landfill.
Since signing the site RODs, new information was received which prompted consideration of a modified remedy. The new information included: unsolicited proposals from commercial landfills to accept the site CKD; public concerns; EPA reevaluation of RCRA applicability; and value engineering which determined two cost saving determinations.
Since issuing the proposed plan, events occurred that prompted changes to the remedy. These events were as follows: start of the OU3 RI/FS; state assurances for operations and maintenance; Summitville feasibility study; and design site characterization.
The objectives of the modified combined remedy are: to remove the source of soil and groundwater contamination; to reduce risks associated with direct contact with waste CKD, exposure to windblown dust from the waste CKD, exposure to soils with elevated levels of lead, arsenic, and alkalinity, and exposure to chromium; and to minimize restrictions on future use of the site.
The modified combined remedy addressed the contaminant sources at the site including cement kiln dust (CKD) and chromium-bearing brick. The modified combined remedy also addresses CKD-contaminated soil underlying the CKD.
The modified combined remedy includes the following major components: removal and off-site disposal of CKD and contaminated soil; removal and off-site treatment and disposal of chromium-bearing bricks; reuse of non-hazardous debris as site fill material; and following removal activities, covering the site with a minimum of 18 inches of clean backfill.
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