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Dioxane Plume (Grid File) [Michigan] {2020}

Michigan Dept. of Environment, Great Lakes, and Energy · 2020 Full Details

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Title
Dioxane Plume (Grid File) [Michigan] {2020}
Description
A series of annual geochemical models were created by RockWare utilizing RockWorks v2021 which were interpolated based on the 1,4-dioxane levels that were measured during 1986 through 2020. In cases where the same intervals were samples on more than one occasion during a given year, the highest 1,4-dioxane values were used. The extent of each annual model were limited to polygons based on only the wells that were sampled during the associated year to eliminate interpolating in areas where data is not present. The annual geochemical models were then filtered based on lithology to eliminate any voxels within the areas deemed impermeable based on lithology. The models were further constrained by utilizing the maximum historical water level surface (MHWLS) grid model to further restrict the interpolation from areas lacking measured data. Finally, the voxel models were converted to annual grid models, in which the cell values are based on the highest value within the corresponding column of voxels.The 2020 plume presented here was created from the RockWorks project database files on June 09, 2021 (Gelman3.sqlite v2021-04-29). The grid file titled2020-01-01_to_2020-12-31.RwGrd (v20210710)was converted by The Mannik and Smith Group (MSG) to a raster file compatible in ArcGIS and a custom color scheme was applied with the shades becoming darker as concentrations increase. Iso-concentration lines were then generated at the following concentrations: 4 ppb, 7.2 ppb, 85 ppb, 150 ppb, 280 ppb, 500 ppb, 1000 ppb, 1900 ppb, 3000 ppb, and 5000 ppb. The 7.2 ppb lines were created because it represents the current EGLE Part 201 generic residential cleanup criterion (GRCC). The 85 ppb lines were created to represent the Consent Judgement 3 (CJ3) drinking water criteria. The 280 ppb lines were created because that is the new EGLE groundwater-surface water interface (GSI) criterion, and 1900 ppb is the Vapor Intrusion criteria. EGLE is contouring the 4 ppb level because that could become a new trigger for response if detected in sentinel wells if the proposed 4th Consent Judgment is approved.To host the plume files on EGLE's ArcGIS Online, MSG prepared the raster file, contour layer, and the input points used as the input for the specified year model in ArcGIS Pro. The points were labeled using three levels of detail. When zoomed out beyond 1:5000 no labels appear at the points because it would be too dense to read and cover the underlying plume. When zoomed in between 1:5000 and 1:1200, the bore name and maximum 1,4-dioxane at that well in 2020 appear. When zoomed in closer than 1:1200, the labels show the boring name, sample depth interval, and maximum 1,4-dioxane at that interval for 2020.The plume layer was set to 7.5% transparency (this can be adjusted later) and shared as a web tile layer using the ArcGIS Online / Bing Maps / Google Maps tiling scheme for levels of detail 12 - 19.This is a previous version of the data. The newest vintage is available at:Gelman Site of 1,4-Dioxane Contamination - Dioxane Plume (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.
Creator
Michigan Dept. of Environment, Great Lakes, and Energy
Temporal Coverage
2020
Date Issued
2021-07-16
Rights
This application or dataset, along with any maps, data, content and other information contained within it and all output from the application (together the “Information”), is provided as a public service, and there are no restrictions on the use, reproduction, or distribution of the Information.  It is your responsibility to use the Information for a legally permissible purpose.  This Information is provided “AS IS” and on an “AS AVAILABLE” basis. The State of Michigan (“State”) makes no warranties, express or implied, regarding the accuracy, adequacy, reliability, timeliness, or completeness of this Information. THE STATE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS INFORMATION, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF PROPRIETARY RIGHTS. THE STATE WILL NOT BE LIABLE, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR BY STATUTE OR OTHERWISE, FOR ANY CLAIM FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION LOST PROFITS AND LOST BUSINESS OPPORTUNITIES, RELATED TO THE ACCESS OR USE OF THIS INFORMATION. IN NO EVENT WILL THE STATE BE LIABLE FOR ANY AMOUNTS THAT MAY RESULT FROM THE ACCESS OR USE OF THIS INFORMATION, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR BY STATUTE OR OTHERWISE. By accessing or using this Information, you agree that you will not make any claims against the State or any of its departments, divisions, officers, or employees related to your use of the Information.  These terms are governed by and interpreted under the laws of the State of Michigan without regard to conflict of laws provisions. Nothing in these terms is meant to impact or replace any existing rights or licenses, such as copyright, trademark, or patent protections, in materials or content that may be located on the site or portal containing the Information.
Access Rights
Public
Format
File
Language
English
Date Added
March 08, 2023

Links

Cite and Reference

  • Citation
    Michigan Dept. of Environment, Great Lakes, and Energy (2021). Dioxane Plume (Grid File) [Michigan] {2020}. . https://gis-michigan.opendata.arcgis.com/maps/egle::dioxane-plume-2020-grid-file (web service)
  • BTAA Geoportal Link

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