• Dissolved oxygen (DO): Identifies aerobic and anaerobic regions of contaminated site and the chemical, physical and biochemical activities occurring. • pH: Identifies the acidity or alkalinity of water. • Temperature: Optimal soil and water temperatures are 10º to 40º C (50º F to 104º F).

For those professionals practicing the remediation of chlorinated hydrocarbons using a co-metabolic approach (via the mixture of oxygen and an alkane gas) such that there is no DCE or VC stall. This is an excellent website that you should be aware of and visit. The paper is lengthy but full of quality information.

The method is most useful for bioremediation of pollutants that are not themselves good aerobic growth substrates for bacteria. With this approach, the added substrate serves as both the electron donor and primary growth substrate for the bacteria. Oxygen is the final electron acceptor in the process.

• Ability to treat compounds generally not subject to direct aerobic oxidation. • Rapid increases in useful biomass through biostimulation of indigenous bacteria. • Rapid and complete biodegradation of target pollutants due to regular input of cometabolic substrate.