Industrial organic waste was removed in small quantities, approximately thee yards, via the City of Eau Claire’s weed harvester (below) from HML’s south western arm to evaluate if composting would be a viable alternative to land filling the industrial organic waste if removed.
Industrial organic sediment extraction via the City of Eau Claire’s weed harvester.
The south western arm was chosen for sampling because of the shallow water and abundance of industrial organic sediment. The samples were located on city property adjacent to HML. Sample one contained curly leaf pond weed (invasive species in HML) and industrial organic waste. Sample two contained only industrial organic waste. The samples were turned over weekly to improve air circulation and promote the heating (decomposition) of the sediment. The same methods as Arlen Albrect’s study of Rib Lake were applied to the HML industrial organic waste.
Heavy metal testing was completed on a sample of the industrial organic waste removed for composting. Analysis was conducted by Jill Fergeson- UWEC Material Science Center.
Results from heavy metal concentrations of the industrial organic waste are above. There were elevated amounts of Fe present in the samples (originating from groundwater). There were also notable amounts of Cadmium, Zinc, Lead, and Copper but none of the heavy metal concentrations exceeded EPA regulations for health implications. There was large woody debris and rubbish in the industrial organic waste.
The results suggest that the heavy metal concentrations are not an issue for composting the industrial organic sediment (NR 538.06. 2006). The study in Rib Lake (Arlen Albrect) has found composting to be a viable option therefore may be viable on HML.