|Site ID: 2442||Site Name: Kittridge Distribution Center||CERCLIS No:|
|Address:||4959 NW Front Ave. Portland 97210|
|County: Multnomah||Region: Northwest|
|Other location information:||The site property occupies 4.95 acres approximately 0.1 miles southwest of the Willamette River. Site stormwater discharges to City of Portland Outfall No. 19.|
|Investigation Status:||Listed on CRL or Inventory|
|Brownfield Site: No||NPL Site: No||Orphan Site: No||Study Area: No|
|Property:||Twnshp/Range/Sect: 1N , 1E , 19||Tax Lots: 1200|
||Site Size: 4.95 acres|
|Other Site Names:||
|General Site Description:|
Between 1942 and 1985 an acetylene plant operated on-site. Waste products (slaked lime) were stored in on-site ponds. Two drain fields/septic systems were present on-site between about 1942 and 1971. A drywell is also reported to have existed on-site.
The site was redeveloped in 1996 and the former buildings and infrastructure were removed. Over 90% of the facility is now either paved or covered with buildings.
The site was identified as a potential source of contamination to the Willamette River based on initial sampling results from a river sediment study. The contamination may have resulted from discharges to city outfalls or shallow groundwater discharging to the river. A Strategy Recommendation completed in December 1999 recommended that an Expanded Preliminary Assessment (XPA) be conducted to evaluate the sediment contamination.
Sediment sampling results from the Portland Harbor revealed elevated levels of barium, cadmium, lead, mercury, silver, zinc, and benzoic acid in sediments adjacent to the site. Elevated levels of metals (zinc, chromium, and lead) and petroleum compounds were documented in subsurface soils in the portion of the site formerly used for storage of lime sludges (the lime pond). This area also had pH readings in the range of 12.5. Acetone, MIBK, and metals were detected in on-site groundwater.
|Manner and Time of Release:||Releases are believed to have occurred during historical operations (e.g., spills, tanks) associated with the acetylene plant and the slaked lime ponds. Historically site stormwater discharges from the site were documented to contain metals. The site redevelopment in 1996 is believed to have eliminated the stormwater pathway.|
|Hazardous Substances/Waste Types:||Site soil and groundwater have been impacted with metals, total petroleum hydrocarbons and volatile organic compounds. Polychlorinated biphenyls (PCBs) were detected in several investigations. Metals (arsenic, cadmium, chromium, copper, mercury, lead, and zinc) detected at elevated concentrations in sediments near City of Portland Outfall No. 19 are similar to those detected on-site. Phthalates, polycyclic aromatic hydrocarbons, and PCBs were also detected in sediments near Outfall 19.|
|Pathways:||Soil and groundwater contamination have been documented at the site. Available groundwater data and the distance to the river (>1000 feet) indicate that it is unlikely that groundwater is migrating from the site to the river.|
|Environmental/Health Threats:||The site lies in an industrialized area. No residentially zoned properties occur within a quarter mile of the site. Because a substantial portion of the site is paved, the risk of exposure to potentially contaminated surface soil appears low. Current or future site workers and utility workers may be exposed to site contaminants in soil during construction or excavation activities. DEQ determined that it is unlikely the site is a current source of contamination to the Willamette River.|
|Status of Investigative or Remedial Action:||
(06/08/2004 RGS/VCP) DEQ determined that the site is not likely a current source of contamination to the Willamette River and that the site is a low priority for further action. EPA agreed that "this site does not appear to be a current source of contamination to the river" in a letter dated May 18, 2004. DEQ recommends that additional sampling be performed to address data gaps and to further characterize hazardous substance releases in the lime pond, the acetylene plant area, and the TPH contaminated areas. This additional focused sampling is needed to determine the nature and extent of contamination and whether the site poses unacceptable risks to human health and/or the environment.
(03/20/2007 CWH/ICP) DEQ reviewed several reports summarizing site conditions and a Feasibility Study that described remedial alternatives for the site. Based on review of these records DEQ selected a remedy, codified in the Record of Decision, that stipulates the following -
• Maintain the existing cap of the site, which consists of warehouse buildings and asphalted parking area;
• Establish a restriction for all uses of groundwater below the site;
• Establish institutional controls via a site-specific contaminated soil and groundwater management plan to guide site activities as they relate to capped contamination areas;
• Record an Easement and Equitable Servitude with the property deed to establish site hazards, inspection and maintenance of the soil cap, and reporting to DEQ.
The Easement and Equitable Servitude (E&ES) was signed by DEQ and Schnitzer Investment Corp. in February 2007 and recorded with Multnomah County on March 13, 2007 (#2007-043680). Since an E&ES was the selected remedial action, the site will remain on the Confirmed Release List (CRL) and Inventory.
1) CH2M Hill "Environmental Site Assessment" [October 1, 1996].
2) Bridgewater Group "Preliminary Assessment" [April 5, 2000].
3) Bridgewater Group "Site Characterization Summary Report" [May 1, 2006].
4) Bridgewater Group "Baseline Human Health Risk Assessment Report" [May 1, 2006].
5) Bridgewater Group "Level 1 Ecological Risk Assessment Report" [May 1, 2006].
6) Bridgewater Group "Land and Beneficial Water Use Report" [May 1, 2006].
7) Bridgewater Group "Feasibility Study Report" [May 1, 2006].
8) DEQ "Record of Decision" [January 25, 2007].
|Substance||Media Contaminated||Concentration Level||Date Recorded|
|TOTAL PETROLEUM HYDROCARBONS (TPH)||Groundwater||2800 ppm - ETC, 1991.||8/30/1990|
|TOTAL PETROLEUM HYDROCARBONS (TPH)||Soil||2800 ppm||1/24/1991|
|Action||Start Date||Compl. Date||Resp. Staff||Lead Pgm|
|No Further Action (Conditional) (Primary Action)||03/13/2007||03/13/2007||Charles Harman||ICP|
|View Full Report Showing Action History|
Site Environmental Controls
|Control Description||Begin Date||End Date||Last Reviewed By||Last Review Date|
|Easement Equitable Servitude||03/13/2007||C. Harman|
|Comments: An Easement and Equitable Servitude (E&ES) was recorded with Multnomah County on March 13, 2007 (#2007-043680). It stipulates the following, in association with DEQ's Jan. 2007 remedy selection: • Worker notification and training program for portions of the Property. • Inspection and maintenance of the existing site cap consisting of buildings, pavement, and landscape fill. • Prohibition of use of shallow groundwater beneath the Property. • Maintaining industrial or commercial land use zoning classifications on the Property.|
|Periodic montioring & reporting, other categories||03/13/2007||C. Harman, DEQ|
|Comments: Inspection and maintenance of the existing site cap consisting of buildings, pavement, and landscape fill.|
|Use Restriction Groundwater||03/13/2007||C. Harman, DEQ|
|Comments: No use of groundwater at the property for consumption or other beneficial use.|
|Use Restriction Land||03/13/2007||C. Harman, DEQ|
|Comments: Property must remain in industrial or commercial use only.|
Key to Certain Acronyms and Terms in this Report:
For more information on this site contact the Northwest regional office.