Part of a joint venture between EPA, TURI and RI DEM to reduce the use of TCE in the Providence, RI area, one trial was conducted on this client’s oil. All six products, Brulin Corporation Aquavantage 1400, International Products Corp Surface Cleanse 930, Warren Chemical Company Sea Wash Blue, Oakite Products Inproclean 3800, US Polychem Corporation Polyspray Jet 790 XS, Magnaflux Daraclean 283, were found to work on the supplied quench oil. Cleaning with ultrasonic energy will increase the effectiveness of the products especially when dealing with intricate parts. Having found products successful on the quench oil, the next step will be to evaluate these cleaners on supplied parts.