Work is finally under way on a long-planned project to build a new PACCAR parts-distribution center in the North Renton neighborhood.

The site, located at Fourth Street North and Garden Avenue North, is approximately 25 acres in size and will house a new 169,147-square-foot building when completed, according to the city.

As part of the project, an existing 28,500-square-foot building previously located on the site was demolished.

The site is also a Superfund site, contaminated with heavy metals, polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyls (PCBs), from waste dumping prior to 1964. Clean-up and remediation was completed in 1996, according to state documents, but long-term groundwater monitoring is ongoing.

From the city standpoint, the only mitigation placed on the site is the retention of mature trees around the perimeter of the site on the inside of the fence along North Fourth Street and Garden Avenue North.

According to the city permit, the project is valued at $11,013,900. Permits have been issued and a timeframe for completion is unknown.

A traffic plan for any potential traffic impacts from the project will be put in place when right-of-way permits are approved for work along streets.

Representatives from PACCAR declined to comment on the project, siting corporate policy not to discuss building projects.