The estimated depth to 1,4-dioxane was created utilizing the latest RockWorks project database files on June 13, 2021 by RockWare Inc. They produced a new grid titled 2020_Depth_To_7.2_Or_Higher.RwGrd. in which the cell size of the grid, 50 feet x 50 feet, matched the grid size of the annual plumes. The z value was a calculation of the depth to 7.2 ppb 1,4-dioxane using the 2020 geochem solid model (v20210710) . The grid was then converted to contour lines in ArcGIS and posted to ArcGIS Online. This data is used in theGelman Site of 1,4-Dioxane Contamination web map(item details).If you have questions regarding the Gelman Sciences, Inc site of contamination contact Dan Hamel at 517-745-6595 orHamelD@michigan.gov.Report problems or data functionality suggestions toEGLE-Maps@Michigan.gov.
Michigan Dept. of Environment, Great Lakes, and Energy