The success of bioaugmentation depends on effective distribution of the beneficial microbes. If the target population is achieved, the remediation rate ranges from 50% to over 99% removal. The rate appears to be independent of the contaminant starting concentrations. This indepedence is the advantage of bioaugmentation. Through bioaugmentation the density of beneficial organisms is sufficient for frequent reactions with high or low contaminant levels. The following chart shows the results of a single application of bioaugmentation at 11 sites in different states, with different contaminants.
The chart also suggests that the results are not time dependent. The apparent time independence may be because the reactions are completed early and because these were grid applications with the monitoring locations within the bioaugmented area instead of downgradient where the results would depend on dispersion rates.
The USEPA tested the degradation rate of oil using Munox SR for NCP listing. The degradation rate exceeded most comparable products with 95% removal of alkanes and 89% removal of aromatics in 28 days. The NCP test results are available at https://19january2017snapshot.epa.gov/sites/production/files/2013-08/documents/notebook.pdf