Olympic Pipe Line Co Kent

74th Ave S & S 259th St Kent, King County
Facility Site ID: 2401 Cleanup Site ID: 3070

  • Site Status

  • No Further Action

More about cleanup

Ecology issued a No Further Action for this site on January 17, 2017.

Ecology held a 30-day public comment period. Ecology determined the Site meets state cleanup standards for soil and groundwater protective of human health and the environment. The Site is delisted from the Hazardous Sites List.

Olympic Pipe Line Co. Kent (Site) is located at 74th Avenue South and South 259th Street, Kent, Washington. In 1989, a release of gasoline and diesel associated with the Olympic Pipe Line Company (OPLC) Kent Block Valve was discovered.

OPLC excavated approximately 30 cubic yards of hydrocarbon impacted soil from the area immediately surrounding the block valve. Additional soil excavations were completed from August 31 – September 27, 1989 when another 1,950 tons of soil were removed. Approximately 168 gallons of contaminated ground water and product were pumped out and removed from the Site. 

Site Background

A release of gasoline and diesel into soil and groundwater associated with the Olympic Pipe Line Company (OPLC) Kent Block Valve failure was discovered in August 1989. The release occurred in a narrow right of way (ROW) parcel located approximately 500 feet east-northeast of the intersection of 74th Avenue South and South 259th Street (the Property). The ROW is owned by Puget Sound Energy (PSE) and leased to OPLC. The block valve is part of an underground pipeline supplying refined petroleum products from refineries in north Washington State to bulk fuel terminals and other facilities for distribution.

Following the discovery, a complete Site investigation was performed to determine the extent of petroleum impacts. The investigation showed the release extended into soils approximately 60 feet to the southeast, 100 feet to the east, and 530 feet to the southwest of the block valve Property.

The ground water plume originally extended from the block valve in a southwesterly direction beneath an adjacent property (25618 74th Avenue South) then towards the Green River located approximately 570 feet to the south.

Remedial Activities are complete, ground water is no longer impacted by the release, OPLC has submitted documentation requesting review of current Site conditions and is requesting a No Further Action determination from Ecology.

Contaminants of Concern 
Petroleum hydrocarbons (TPH), benzene, ethylbenzene, toluene and xylenes (BTEX) were released into soil and ground water.

Voluntary Cleanup Program

This site was cleaned up under our Voluntary Cleanup Program, which provides technical help to owners of contaminated sites.

Voluntary Cleanup Program customers pay fees to cover our costs for technical help and reviewing cleanup reports. Sites in this program must meet the same cleanup standards as the sites Ecology manages under legal orders.

Places to see print documents
Map 3
Public Information 2
Document Title Document Date Document Type
Olympic Pipe Line Co Kent - Delisting Fact Sheet (Spanish) 12/2/2016 Fact Sheet\Public Notices
Olympic Pipe Line Co Kent - Delisting Fact Sheet 12/2/2016 Fact Sheet\Public Notices
Technical Reports 10
Document Title Document Date Document Type
Ecology Response Phil Sims 04-03-2017 4/3/2017 Site Specific Administrative Document - other (Administrative correspondence)
Ecology Response Art Segal 04-03-2017 4/3/2017 Site Specific Administrative Document - other (Administrative correspondence)
Ecology Responce Cheryl Banks 04-03-2017 4/3/2017 Site Specific Administrative Document - other (Administrative correspondence)
Olympic Pipeline Co Kent—NW2705 Response to Opinion Letter 3/24/2016 Site Specific Technical Document - other
Olympic Pipeline Company Kent Block Valve Subsurface Investigation Report 11/18/2015 Site Specific Technical Document - other
Work Plan for Confirmatory Soil Sampling 8/25/2014 Site Specific Technical Document - other
Semi-Annual Status Report 8/13/2014 Groundwater Monitoring Report
Olympic Pipeline Co Kent— NW2705 Remedial Investigation Report 12/31/2012 Site Specific Technical Document - other
OLYMPIC PIPE LINE CO KENT Site Hazard Assessment 2/1/2000 Site Hazard Assessment Report
Olympic Pipe Line Co Kent - Site Hazard Assessment 1/24/2000 Site Hazard Assessment Report
Voluntary Cleanup Program 3
Document Title Document Date Document Type
NW2705 NFA 01-17-2017 1/17/2017 VCP Opinion on Site Cleanup – NFA
Draft No Further Action Letter - Olympic Pipe Line Co Kent 8/16/2016 VCP Opinion on Site Cleanup – NFA
Opinion on Remedial Investigation 6/12/2013 Voluntary Cleanup Program Opinion – Other
There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.

Places to see print documents

  • Northwest Regional Office
    15700 Dayton Ave N
    Shoreline, 98133
    Please schedule an appointment to view print documents at this location.

Contaminants 5

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Non-Halogenated Organics - Petroleum Products-Unspecified RB RB B
Non-Halogenated Organics - Non-Halogenated Solvents RB RB B
Non-Halogenated Organics - Other Non-Halogenated Organics RB RB
Non-Halogenated Organics - Petroleum-Diesel RB
Non-Halogenated Organics - Petroleum-Gasoline RB RB
S
Suspected
C
Confirmed Above Cleanup Levels
B
Below Cleanup Levels
RA
Remediated-Above
RB
Remediated-Below
R
Remediated
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.