View Larger Map - The map shows the sampling locations of Project 4 - Biological Response Indicator Devices.
PSDs were used to measure polycyclic aromatic hydrocarbons (PAHs) in the Willamette River; upriver, downriver and within the Portland Harbor Superfund megasite during wet and dry seasons.
Click on location for a pop-up window listing name, location, and years sampled.
River miles are approximate and rounded to the nearest half mile.
The exact coordinates of the study sites may have changed slightly from year to year and deployment to deployment depending on local conditions.
Portland Harbor Superfund Related Maps
On August 26, 2011, RTC leaders Daniel Sudakin and Dave Stone attended a boat tour of the Portland Harbor. The tour was organized by the Port of Portland and Northwest Natural gas. Attendees included representatives from the office of State Senator Merkely, Oregon State Representative Cliff Bentz, officials from the Oregon Department of State Lands, and representatives from Port of Portland and Northwest Natural. The boat tour included an informative summary of the history of the Portland Harbor Superfund Site. View pictures
Passive Sampling Devices (PSD): A method of determining airborne and water concentrations of volatile contaminants. PSDs collect samples with a small badge-like device that relies on the diffusion of compounds to a collection surface or sorbent. The diffusion barrier across the badge confers a constant, predetermined effective flow rate that is only slightly affected by temperature and unaffected by pressure (or altitude). The PSD hangs in the sampling area for periods ranging from 8 hours to one month. After the sampling period, it is capped and returned to a laboratory for analysis using traditional methods.