ANC Mill Site Reclamation

Objective:

To assess the impact of landspreading sludge on an operational scale at the Alberta Newsprint Mill site.

Methods

  • Samples were obtained  to determine baseline characteristics of the soil and sludge at 60 dry t/ha application rate.  A comparison of the 1994 baseline data was compared with the post-application data obtained in 1995.
  • No vegetation analyses were completed.
  • Analyses completed included: pH (CaCl2, H20), TOC, TC, CO3 equiv., Sat Paste Extract, nitrates, nitrites, NH4, S, Mg, Na, Ca, K, SAR.

Results

  • Samples were obtained  to determine baseline characteristics of the soil and sludge at 60 dry t/ha application rate.  A comparison of the 1994 baseline data was compared with the post-application data obtained in 1995.
  • In general, data indicated that an application of 25 t/ha had very little effect on the soil chemical properties. 
  • Changes in SAR and EC one year after application were small and had no impact on soil quality ratings.
  • Nitrate and nitrite were occasionally elevated, however effects were difficult to separate from fertilizer effects.

 Conclusions

  • Pre and post application sampling indicated that any changes in pH, C:N ratio, EC, soluble Na, and SAR were not significant in terms of soil quality.