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Environmental Cleanup Site Information (ECSI) Database Site Summary Report - Details for Site ID 3103, PDC Block R

This report shows data entered as of November 17, 2018 at 9:27:54 AM

This report contains site details, organized into the following sections: 1) Site Photos (appears only if the site has photos); 2) General Site Information; 3) Site Characteristics; 4) Substance Contamination Information; 5) Investigative, Remedial and Administrative Actions; and 6) Site Environmental Controls (i.e., institutional or engineering controls; appears only if DEQ has applied one or more such controls to the site).  A key to certain acronyms and terms used in the report appears at the bottom of the page.

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Environmental Cleanup Site Information (ECSI) Database Site Summary Report - Details for Site ID 3103, PDC Block R

General Site Information

Site ID: 3103 Site Name: PDC Block R CERCLIS No:
Address: Block bounded by NW 6th/Broadway/Glisan/Hoyt Portland 97209
  County: Multnomah Region: Northwest
Other location information: A city block in Portland bounded by NW Broadway on the west, NW 6th Avenue on the east, NW Hoyt Street on the north, and NW Glisan Street on the south.
Investigation Status: Suspect site requiring further investigation
Brownfield Site: No NPL Site: No Orphan Site: No Study Area: No
Property: Twnshp/Range/Sect: 1N , 1E , 34 Tax Lots: 2500, lots 1-8
  Latitude: 45.5269 deg. Longitude: -122.6769 deg.  Site Size:
Other Site Names:
  River District Parcel 6
  Portland Development Commission

Site Characteristics

General Site Description: The site has been vacant since 1988. Portions of the site were developed as early as 1889 (blacksmith, paint shop). At least three dry-cleaning sites and two service stations were present at the site from as early as the mid-1920s to the 1960s. Hotel Victoria (1931-1960) and the Hoyt Hotel (1911-1977) also operated at the site. A Pacific Trailways bus depot operated on-site between 1980-1985. Underground storage tanks were expected to be associated with the service stations and possibly the hotels. PDC acquired the property from Hood Stages Inc., doing business as Pacific Trailways, Inc., in October 1977.
Site History:
Contamination Information: (7/5/01 MTP/VCP) A Phase I, Phase II with sampling, and Pre-Remedial (Pre-RI) investigations have been conducted at the site. The Phase I report provides a comprehensive survey of historic site activities and identified former dry cleaner sites, service stations, and possible USTs associated with the stations and/or hotels as possible contaminant sources. Soil and groundwater sampling conducted in the Phase II and Pre-RI investigations showed that service station and/or associated current/former USTs, and asphaltic roofing material are contaminant sources at the site. A risk screening indicated that arsenic and a number of PAHs in soil, and arsenic, lead, and benzo(a)pyrene in groundwater, are contaminants of potential concern (COPCs) at the site. Because no VOC analyses were conducted for soil, the assessment of the dry-cleaning sites as potential contaminant sources does not appear complete. (4/1/03 MTP/VCP) Additional investigation conducted in March 2002 further refined the extent of contamiation. VOCs were not detected at levels of concern. PAHs were detected above risk-based concentrations (RBCs) in soil. A number of PAHs, lead and arsenic, and the VOCs trichloroethene (TCE), naphthalene, and vinyl chloride have been detected above their respective US EPA Region 9 Preliminary Remediation Goals (PRGs) for tapwater.
Manner and Time of Release: Surface and subsurface releases to soil through spills and possibly underground storage tanks. Imported fill placed at the site also may be a contamination source.
Hazardous Substances/Waste Types: Petroleum products and compounds, such as polynuclear aromatic hydrocarbons (PAHs) in soil, and trimethylbenzene in groundwater. PAHs in soil also appear related to asphaltic roofing materials. Possibly chlorinated hydrocarbons from dry-cleaning operations. Imported fill of unknown origin may be a source of arsenic in soil and groundwater.
Pathways: Surface soil, subsurface soil, groundwater, and air through dust and volatilization. The site is located about 1000 feet west of the Willamette River. Relatively low concentrations of arsenic, lead, and PAH benzo(a)pyrene in groundwater do not appear to pose a threat to the Willamette River, but are present at concentrations above EPA Region 9 Preliminary Remediation Goals (PRGs) for tap water. There may not be a beneficial use for groundwater in the locality of the facility.
Environmental/Health Threats: The primary exposure pathway appears to be direct contact, incidental ingestion/inhalation of occupational site workers to polynuclear aromatic hydrocarbons (PAHs) and arsenic. Direct exposure of site utility/trench workers to contaminated surface and subsurface soil may be possible. Relatively low concentrations of PAHs in groundwater do not appear to pose a threat to the Willamette River, but are present at concentrations above EPA Maximum Contaminant Levels (MCLs). There may not be a beneficial use for groundwater in the locality of the facility.
Status of Investigative or Remedial Action: (7/5/01 MTP/VCP) PDC completed a Pre-RI report in March 2001, and joined DEQ's Voluntary Cleanup Program for review of site reports and determination of the "no further action" status at the site. PDC had indicated that site characterization is complete and with DEQ concurrence, has proposed conducting a focused risk assessment to address soil contamination, and a beneficial groundwater use assessment. DEQ began review of the site documentation in June 2001 and is preparing comments. (4/1/03 MTP/VCP) DEQ presented a scope of work for additional field investigation in a memorandum dated July 24, 2001. Additional investigation was conducted in March 2002, and consisted of advancing 5 direct-push borings for soil sample collection, and sampling of the existing monitoring wells. DEQ reviewed the resulting RI report, although further evaluation of the extent of PAH contamination was suggested.

(11/5/04 MTP/VCP) PDC has conducted a removal of 220 tons of asphaltic roofing material and petroleum-contaminated soil.
Data Sources: 1) Phase I Environmental Report, AGRA, July 1999. 2) Phase II Environmental Report, AGRA, April 2000. 3) Preliminary RI Report, AMEC, March 2001. 4). Follow-up Preliminary Remedial Investigation Report, River District Block R Site, NW Broadway Street and NW Glisan Street, Portland, Oregon. January 2003, AMEC Earth & Environmental.5)Asphalt roofing Material and Petroleum containing soil removal, river district block R, AMEC, October 15, 2004.

Substance Contamination Information

Substance Media Contaminated Concentration Level Date Recorded
ARSENIC Soil 6-7' soil, 41.5 ppm 6/1/2000
BENZO(a)ANTHRACENE Soil 6.5-7.5' soil, 600 ppm 4/1/2000
BENZO(a)PYRENE Groundwater 6.6 ppb 6/1/2000
BENZO(a)PYRENE Soil 6.5-7.5' soil, 480 ppm 4/1/2000
BENZO(b)FLUORANTHENE Soil 6.5-7.5' soil, 480 ppm 4/1/2000
BENZO(k)FLUORANTHENE Soil 6.5-7.5' soil, 180 ppm 4/1/2000
CHRYSENE Soil 6.5-7.5' soil, 520 ppm 4/1/2000
DIBENZO(a,h)ANTHRACENE Soil 6.5-7.5' soil, 94 ppm 4/1/2000
DIESEL - FUEL OIL Soil 15-16' soil, 1200 ppm 4/1/2000
GASOLINE Soil 6.5-7.5' soil, 230 ppm 4/1/2000
INDENO(1,2,3-cd)PYRENE Soil 6.5-7.5' soil, 340 ppm 4/1/2000
LEAD Groundwater 0.167 ppb 6/1/2000
LEAD Soil 5-6' soil, 353 ppm 4/1/2000
METHYL-tert-BUTYL ETHER Groundwater 9.67 ppb 6/1/2000
OIL OR FUEL RELATED COMPOUNDS Soil 5-6' soil, 630 ppm 4/1/2000
TETRACHLOROETHYLENE Groundwater 2.05 ppb 6/1/2000
TOLUENE Groundwater 0.84 ppb 6/1/2000
VINYL CHLORIDE Groundwater 0.56 ppb 6/1/2000

Investigative, Remedial and Administrative Actions

Action Start Date Compl. Date Resp. Staff Lead Pgm
Removal Action Recommended (RM)  (Primary Action) 03/16/2006 03/16/2006 Michael Greenburg VCP
View Full Report Showing Action History

Key to Certain Acronyms and Terms in this Report:

You may be able to obtain more information about this site by contacting Michael Greenburg at the Northwest regional office or via email at greenburg.michael@deq.state.or.us. If this does not work, you may contact Mitchell Frister at (503) 229-6783, or via email at frister.mitch@deq.state.or.us or contact the Northwest regional office.