REGION 10 DIVE TEAM
www.epa.gov/region10/dive
EPA Region 10 Dive Team
Diver Core Sample Collection, Portland Harbor Superfund Site, Terminal 4
What: The EPA Region 10 Dive Team assisted the Superfund program in conducting sampling at
Terminal 4 within the Portland Harbor Superfund Site.
Why: Divers collected core samples to assist the Project Manager in recommending cleanup actions for
this Non-Time Critical Removal.
Where: Under piers located at Terminal 4 at 11040 N. Lombard, Portland, OR approx. Latitude 45°
36.0' N Longitude 122° 46.3' W.
When: March, 2004.
How: Divers utilized three and one foot core tubes depending on the depth of sediment. In rip-rap areas,
jars were used to collect surface sediment. Due to frequent combined sewer overflow (CSO) in the
Portland area, decon procedures were necessary. See the safety / SOP page for more information on
diver decon and polluted water scientific diving.
Results: Divers found that most under pier areas were covered with rip-rap and that available sediment
for sampling was limited. At the berth between Slip 3 and Wheeler Bay, substantial sediment depth was
encountered, allowing the three foot core tubes to be used.
More Details: http://vosemite.epa.gov/R10/CLEANUP.NSF/sites/T4
Contact: Sean Sheldrake, sheldrake.sean@epa.gov.

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Photos:
Divers under pier in slipl

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Diver with 1 foot cores and jars.

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Sampling in low visibility: Diver collecting a jar sample off the bottom where there was core
refusal.

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The Monitor in Wheeler Bay
with divers in
the water under-pier

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' L.--T)

entering the
water off the
EPA vessel Monitor
Divers
Return to EPA Region 10 Dive Team homepage.

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