Sea Tac Downwinders

ASARCO research project (includes haz-mat sites in the Kent/Des Moines area)




Salt Air Section

This page will be used for previous hazardous material sites located west of Pacific Highway South and east of Parkside Elementary School between 240th St and 252nd St.

The Salt Air neighborhood is incorporated into the cities of Des Moines and Kent.

US DOE Site

(classified as level 3 by Sound Transit for hazmat activity)


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Former US DOE transformer storage site from the 1960s-1970s (currently a trucking sales lot)

When used for transformer storage, it was next to a retirement home (known as Midway Manor).  This location is 1/2 mile northeast of Parkside Elementary.

Since the 1960s PCB (polychlorinated biphenyl) has been considered a carcinogen (known to cause cancer in animals).

After attention was focused on the hazards and storage of oil containing PCB  (used as an insulator inside of transformers) the site was up for sale sometime in the late 1970s or early 1980s.

1960s style high voltage transformer

source:(https://en.wikipedia.org/wiki/Distribution_transformer#/media/File:Pylon_transformer_in_Syria.jpg (under creative commons license)