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Environmental Cleanup Site Information (ECSI) Database
|Site ID: 1973||Site Name: PECO, Inc.||CERCLIS No:|
|Address:||4707 and 4720 SE 17th Ave. Portland 97202|
|County: Multnomah||Region: Northwest|
|Other location information:||Facility on both sides of SE 17th, generally between SE Pardee and SE Schiller, but also extending down to SE McLoughlin on the east side of SE 17th. Tax Lots 3700, 3800, 4000, 4100, and 4200. Plus in Holgate Addition, east and west halves of Lot 2 of Block 1, Lots 1 and 2 of Block 5, Lots 12 through 27 of Block 6, and Lots 1 through 7 and 11 through 20 of Block 7. (Total 6.48 acres).|
|Investigation Status:||Listed on CRL or Inventory|
|Brownfield Site: No||NPL Site: No||Orphan Site: No||Study Area: No|
|Property:||Twnshp/Range/Sect: 1S , 1E , 14||Tax Lots: 42 lots N of McLoughlin|
||Site Size: 6.48 acres|
|Other Site Names:||
|General Site Description:||The PECO facility manufactures specialty items for the aerospace industry through injection molding of plastics, casting of aluminum and component assembly.|
Chlorinated solvents including PCE, TCE, and related daughter products have been detected in a number of locations beneath the subject site. The highest concentrations (>300 mg/l) have been detected in the West Plant located near the northwest corner of SE Schiller and SE 17th. The probable source of the contamination is historic releases from former vapor degreasers. Groundwater contamination from West Plant releases extends off-site to the west, with low levels found at SE Milwaukie Avenue. On-site, contamination extends below the water table aquifer and into the underlying intermediate groundwater zone, but does not appear to extend into the regional Troutdale Gravel aquifer. Solvents have also been detected at lower concentrations in shallow groundwater south of the West Plant, and in various East Plant locations (east of SE 17th). The source of the releases near the East Plant is not known at this time. Contamination from the West Plant extends west to the Willamette River, where low level detections have been found.
PCBs have also been detected in shallow soil west of the West Plant, the source being waste hydraulic oil from die cast machines that was discharged to the ground after use, and inside the West Plant. Cleanup of PCB contamination in soil outside (west ) of the West Plant was completed in 2005 with DEQ and EPA (TOSCA) oversight, while remediation of concrete and soil impacted by PCBs within/below the West Plant floor was completed in November 2006. Both were performed to DEQ and EPA satisfaction. The closeout report for the interior West Plant work has been reviewed and approved by DEQ and EPA.
Pilot testing of groundwater treatment beneath the West Plant Building was performed in multiple phases from 2005 to 2007, and expanded to a interim treatment system in 2008. Treatment is ongoing. Pilot testing outside of the West Plant Building (near the Walker Building) was performed October 2008 through October 2009. Sub-slab vapor extraction beneath the West Plant Building is also occurring as part of the West Plant IRM.
A draft Human Health Risk Assessment (HHRA) has been reviewed by DEQ, and comments submitted. A revised document is expected in early 2010.
|Manner and Time of Release:||
Suspected source of solvents beneath the West Plant building is releases of solvents (primarily TCE) from sumps and raceways connected to the vapor degreaser in this building. Source of solvents detected south and southwest of the West Plant building, and in several locations beneath/around the East Plant is not known (isolated use and incidental release of degreasers suspected), but contribution from off-site sources is possible.
Release of PCBs to soil west of the West Plant is thought to have occurred through storage of waste hydraulic oils and related spills, and historic application of waste oil in the gravel parking area for dust suppression.
|Hazardous Substances/Waste Types:||
Volatile organic compounds (TCE) associated with site use of solvents for vapor degreasing. Associated impurities and degradation products (PCE, cis-1,2-DCE and vinyl chloride) are also present.
PCBs from hydraulic fluids formerly used in West Plant die cast machines.
Vapor intrusion to indoor air is the primary pathway associated with VOCs in soils beneath site buildings. Vapors originating from groundwater plume with subsequent transport to outdoor air or intrusion into indoor air at nearby residences considered to be a minimal threat, but is still under evaluation at this time. Beneficial use of site and area groundwater is still under review, threat posed by use(s) of impacted groundwater yet to be determined.
Pathways of exposure associated with release of PCBs to surface soils at the West Plant parking lot and building have been eliminated through contaminant removal and engineering and institutional controls.
|Environmental/Health Threats:||Primary current site threats are potential vapor intrusion into buildings, and migration of contaminated groundwater to the Willamette River. The vapor intrusion threat is largely mitigated by ongoing treatment and operation of a SVE system. At the river, site-related VOC concentrations are sufficiently low to pose little or no risk to human or ecological receptors.|
|Status of Investigative or Remedial Action:||
Overview: Since February 2002, a number of phases of site investigation have been completed to document the nature and extent of site contamination. The extent of soil and groundwater contamination has generally been defined. Current RI work is focused on better definition of solvent contamination in groundwater beneath both the West and East Plant buildings, and pilot testing in the West Plant (in-situ chemicall oxidation and sub-slab vapor collection) to address the indoor air risk to building occupants. Off-site sampling has shown that contamination is present a significant distance southwest (downgradient) of the West Plant release area, but does not impact the Willamette River.
Investigation and Interim Action Specifics: Based on the detection of high concentrations of PCBs in a gravel parking lot west of the West Plant, an EPA and DEQ-approved removal action was completed in 2005, and most PCB contamination removed. Some deeper contamination immediately west of the West Plant and including a drum storage shed was left in place and capped with concrete. A deed restriction has been recorded documenting the presence of the contamination and requiring inspection and maintenance of the concrete cap. A source area pilot test to address the West Plant TCE source area was initiated in July 2005 following approval of a work plan by DEQ; pilot testing has included multiple phases of oxidant injection from August 2005 to May 2006 using the Regenox product in the presume release area. A second phase of in-situ treatment was started in November 2007 using a different oxidant (ozone with peroxide) and is ongoing. To date, significant (order of magnitude) reductions in contaminant concentrations have been observed as the result of this work. Prior to and concurrent with this work, a subslab vapor collection systems hase been installed both within the source area and western (downgradient) margin of the West Plant building to reduce contaminant vapor flux into the building.
Remediation of PCB contamination within the West Plant building was completed in November 2006 under DEQ direction, and included limited concrete and soil removal around the former Harvill dye casting machine, and cleaning of the entire West Plant floor.
Site remedial investigation was largely completed in 2011, and documented in the Final Remedial Investigation Report (June 2011) approved by DEQ. After numerous iterations, the site human health risk assessment (HHRA) was near complete in July 2011. Supplemental IRAM work (SVE) was approved by DEQ in June 2011 and is ongoing in both the East and West Plant areas. A final Feasibility Study was approved by DEQ dated March 16, 2012. the proposed remedial action is removal of soil hot spots in the West Plant source are, ongoing SVE, and treatment of groundwater beneath selected portions of both the East and West Plant Buildings.
As of April 2013, remedial action is ongoing. Removal of the West Plant soil hot spot is expected to occur in May 2013.
Selected site reports are as follows. Please visit DEQ Northwest Region office to view full Cleanup Program file for this site. All site reports to date have been prepared by PNG Environmental, Inc. for PECO.
1) Focused Remedial Investigation, Status Report #4, April 14, 2003.
2) Status Report #6, November 13, 2003.
3) Final PCB IRAM Report, May 26, 2005.
4) Final Work Plan for Source Delineation (Former TCE Vapor Degreaser Area), July 15, 2005.
5) Focused Feasibility Analysis - West Plant Building, October 12, 2006.
6) Final Closure Report, PCB Interrim Remedial Action Measure fof WEst Plant Building; March 20, 2007.
7) Groundwater Monitoring and Remedial Investigation Status Report; May 17, 2007.
8) Work Plan for Pilot Treatability Investigation: Ozone Injection and Sub-Slab Vacuum Testing; September 12, 2007.
9) Groundwater Monitoring and Remedial Investigation Status Report; March 5, 2008.
10) Results of Semi-Annual Groundwater Monitoring; June 25, 2008.
11) In-Situ Chemical Oxidation and Soil Vapor Extraction pilot Testing Performance Evaluation, PECO West Plant Building; December 30, 2008.
12) Draft Baseline Human Health risk Assessment; January 16, 2009.
13) Groundwater Monitoring and Remedial Investigation Status Report; March 20, 2009.
14) Pilot Testing Status Report (Walker Building Aea); May 22, 2009.
15) Groundwater Monitoring Status Report; October 30, 2009.
16) Groundwater Monitoring Status Report; February 4, 2010.
17) March 2010 Semi-Annual Grondwater Event; June 24, 2010.
18) West Plant Building TCE Source Area, Soil Vapor Investigation Results; July 22, 2010.
19) Interim Remedial Action Measures Status Report; July 26, 2010.
20) June 2010 Quarterly Groundwater Monitoring Event; August 24, 2010.
21) PECO West Plant Area Surface Water Drianage with Respect to On Site PCB Releases and Imdplications for the Willamette River "Downtown Reach", November 3, 2010.
22) Phase II Environmental Site Assessment; prepared by Parametrix for Tri-Met right-of-way through site. May 17, 2011.
23) Final Remedial Investigation Report; May 23, 2011.
24) Supplemental IRAM work Plan, SVE System Expansion at VOC Source Areas; June 13, 2011.
25) Draft Feasibility Study; December 29, 2011.
26) Final FeasibilityStudy; March 16, 2012.
27) Interim Remedial Action Work Plan for Enhanced Reductive Dechlorination. East Plant Building - PECO, Inc.
28) DEQ Record of Decision. August 22, 2012.
29) Tech Memo - PECO West Plant Monitoring Well Network and Remediation Infrastructure Modifications. SAGA, January 29, 2013.
30) Draft Remedial Design/Remedial Action Work Plan. PNG, March 4, 2013.
31) Contained-In Waste Determination Request for VOC-Contaminated Soil Waste; PNG, March 21, 2013.
32) Remedial Design/Remedial Action Work Plan (Final). PNG, March 21, 2013.
|Substance||Media Contaminated||Concentration Level||Date Recorded|
|PCB 1242||Soil||West Plant embankment|
|PCB 1248||Soil||West Plant embankment|
|PCB 1248||Soil||West Parking Lot soils|
|Action||Start Date||Compl. Date||Resp. Staff||Lead Pgm|
|REMEDIAL ACTION (Primary Action)||03/21/2013||Daniel Hafley||VCP|
|View Full Report Showing Action History|
Site Environmental Controls
|Control Description||Begin Date||End Date||Last Reviewed By||Last Review Date|
|Comments: Warning signs posted in Drum Storage Shed to notify workers of presence of PCB contamination in and beneath floor. Floor is covered by a sealant. Last cap inspection completed December 27, 2010.|
|Contamination left in place, Soil||08/16/2004||Hafley||12/18/2010|
|Comments: 1st cap inspection completed 6/10/05 by Keith Dahlheimer of PECO. 2nd cap inspection completed 12/21/05 by Keith Dahlheimer, Plant Manager, PECO. 3rd cap inspection completed 12/21/06 by Keith Dahlheimer 4th cap inspection completed by 12/29/08 by Scott Newman, Facilities Manager, PECO. 5th cap inspection completed December 2009 by John McCarthy (West Plant Production Manager) and Paul Ecker (PNG Environmental). 6th cap inspection completed December 2010 by John McCarthy 7th cap inspection December 15, 2011. Cap is acceptable.|
|Easement Equitable Servitude||08/11/2005||Dan Hafley||12/21/2006|
|Comments: Easement recorded in Multnomah County on July 7, 2005.|
Key to Certain Acronyms and Terms in this Report:
You may be able to obtain more information about this site by contacting Daniel Hafley at the Northwest regional office or via email at email@example.com. If this does not work, you may contact Gil Wistar at (503) 229-5512, or via email at firstname.lastname@example.org or contact the Northwest regional office.
For more information about ECSI call Gil Wistar at 503-229-5512 or email.
For more information about DEQ's Land Quality programs, visit the DEQ contact page.