A new in-situ technology, HRC Advanced (HRC-A), time-releases a combination of highly efficient lactic and fatty acids that enhance the near-, mid- and long-term biodegradation of many chlorinated and other contaminants, including industrial degreasers, chlorofluorocarbons, carbon tetrachloride, methylene chloride and a variety of pesticides, explosives and dyes. HRC-A is shipped as a concentrate and mixed onsite with three parts warm water to form a micellular microemulsion, which has greater soil-coverage capacity than comparable products.