Terraclean is a mixture of hydrogen peroxide and paracetic acid. Both
react quickly in soils, and I would expect them to be down to pre-application
levels in a couple of days. This study on Perasan and Perasan-A (same
ingredients as Terraclean) has details:
http://www.envirotech.com/pdf/PAA%20...0in%20Soil.pdf
So I would expect no contamination with Actinovate or Terraclean applied
the year before to have any effect on this year's tests.