The Client:

U.S. Army Garrison – Hawaii (USAG-HI)

The Challenge:

The U.S. Army Garrison–Hawaii (USAG-HI) was responsible for the long-term management of the groundwater at Schofield Barracks on Oahu, Hawaii, in accordance with the record of decision. When a farming partnership wanted to build a chicken farm within Schofield Barracks’ groundwater plume, the USAG-HI was required to install a filtration system to remediate water sources and ensure the groundwater met drinking water standards.

The Approach:

Nakupuna Companies designed and installed a carbon filtration system (CFS) to remediate the contaminated groundwater. The field activities included construction of a concrete pad for the CFS, installing fencing surrounding the concrete pad, installing four 5-foot diameter granular activated carbon (GAC) vessels and associated piping. For sustainment, quarterly monitoring of the treated water is being conducted as part of the long-term management plan. Pre-treatment, mid-treatment, and post-treatment samples are collected during each sampling event. Operations and maintenance are also conducted on a quarterly basis and include inspecting the general condition of the CFS valves, sample ports, pipes, and bag filters, as well as the condition of the installed fencing and signs.

The Results:

The Nakupuna Companies were able to include both the USAG-HI and Villa Rose Farm in the design and construction of the CFS as well as the long-term management of the facility. Quarterly water sampling has proven the CFS is effectively remediating the TCE and carbon tetrachloride levels, ensuring the facility is protecting human health and the environment. The USAG-HI has commended the Nakupuna Companies for their work, remarking that “the project team demonstrated professionalism in interactions with the Army and stakeholders, provided timely and quality deliverables, and overall gave the Army an exceptional product while adjusting to changing requirements.”