Unitek Solvent Service - Company Overview. Unitek is a locally operated company that has been in business since 3 / 1 / 1989, it has grown to be the largest petroleum recycling company in the state of Hawaii. Its main offices and recycling facility are located on Oahu and has locations on Maui, Kauai and the Big Island. Unitek collects and processes petroleum products that would otherwise be sent out of state for disposal. Unitek has been in the ...
