The Lake George Association on Tuesday released research showing the herbicide ProcellaCOR remained in Lake George sediments for over a year at levels LGA said has the potential to harm the lake’s ecology. The Lake George Park Commission within days of the herbicide’s use reported that it was no longer detectable within the lake’s waters within 24 hours, as expected. Calls for comprehensive management planWiltse and Lake George Waterkeeper Chris Navitsky in an interview Tuesday said they think the best next step for Lake George officials is to develop a broader lakewide invasive species management plan to guide an overall strategy to milfoil control and hash out whether and when chemical approaches are appropriate. “Our position remains that we have concerns about the use of chemical herbicide in Lake George,” Navitsky said. Wiltse said the organization planned to evaluate other lakes where ProcellaCOR was used prior to Lake George to see whether it continued to persist in sediments beyond what was documented in Lake George.