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 is a previous version of the data. The newest vintage is available at:Gelman Site of 1,4-Dioxane Contamination - Depth to Dioxane (2023 Data).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 Chris Svoboda at 517-256-2849 or svobodac@michigan.gov. Report problems or data functionality suggestions toEGLE-Maps@Michigan.gov.
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