Termidor®H•P II High Precision Termiticide concentrations in sandy-loam and sandy-clay-loam building foundation soil were measured 1.0-hour after high-pressure vertical liquid injections into the soil using the Termidor®H•P High Precision Injection System. Cylindrical, vertical 30.5-cm-deep soil cores were extracted and separated into four 7.6-cm-long sequential partitions, and fipronil residues in each partition were determined. Fipronil residues were present in concentrations lethal to subterranean termites within all soil core partitions throughout the 30.5-cm-deep maximum soil sampling depth. Some termiticide was not recovered because it dispersed deeper than the 30.5-cm maximum soil core depth and therefore was not sampled.

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