Rating System

LEED BD+C: New Construction, LEED BD+C: Core and Shell, LEED BD+C: Schools

Rating System Version

v3 - LEED 2009, v2 - Schools 2007, v2 - LEED 2.2

Inquiry

Our site is an industrial/office park and already has documented petroleum contamination dating back to 1992. Contamination came from a leaking UST. The UST and impacted soil were removed in the 1990s, but a contaminated groundwater plume was also discovered. The plume was contained on site. Since then, monitoring wells and air sparging equipment have been installed to continue the clean-up process. The site is listed as contaminated with the Washington State Department of Ecology, who is tracking the well data, and they have a facility site ID for the project. Our proposed development will involve decommissioning of the existing monitoring wells and air sparging equipment. Approximately six new wells will be constructed on-site, and continued clean-up measures will involve treatments of Chemox (chemical oxidation) and/or enhanced bioremediation measures. The Washington State DOE will continue to monitor data from the new wells on a quarterly basis. Any petroleum-impacted soil encountered during construction will be removed and treated accordingly. We wanted to verify that we qualify for the Brownfield Redevelopment credit for our efforts even though previous remediation measures have occurred on-site, as the site is still considered contaminated by the Washington State DOE, with contaminant levels above Washington State Model Toxics Control Act levels.