Identification_Information: Citation: Citation_Information: Originator: Donald A. Keefer, Illinois State Geological Survey Publication_Date: 1995 Title: Potential of Agricultural Chemical Contamination of Aquifers in Illinois Edition: 20040413 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: ISGS GIS Database Issue_Identification: GISDB_HYDRO.IL_Aquifer_Agri_Contam_Potent Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Larger_Work_Citation: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Potential of Agricultural Chemical Contamination of Aquifers in Illinois Edition: 1995 revision Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Environmental Geology Issue_Identification: 148 Publication_Information: Publication_Place: Champaign, Illinois, USA Publisher: Illinois State Geological Survey Other_Citation_Details: 28 pages, 2 figures, 5 plates (supersedes OFS 1991-7) Description: Abstract: This is a statewide SDE feature dataset for evaluating the potential for contamination of shallow aquifers by pesticides and nitrate. The sources of this data set were published and digitized at 1:250,000; however, the soils map and depth to aquifer map (stack-unit map) were generated from source data mapped at 1:15,000 and 1:64,000, respectively. This aquifer sensitivity map was published at 1:500,000 (statewide map), and 1:250,000 (county maps). Nominal scale is 1:250,000. Two statewide data sets were identified as containing information that would be useful for producing aquifer sensitivity maps: a soil association map (and database) and a map of geologic materials to a depth of 50 feet (Stack-unit map). The soil association map and database were used in an interpretive mapping model that generated maps of nitrate and pesticide leaching classes by examining factors that relate to water movement characteristics of the soil. The pesticide contamination sensitivity data set was created by combining the nitrate map interpretations with information on the distribution of organic matter. (Pesticides are organic compounds that tend to adsorb to soil organic matter, and so have their movement in soil water retarded.) One of the results is six nitrate and six pesticide leaching classes that group soil associations based on the relative probability of nitrate and pesticide movement through the associated soil profiles. The ranking is qualitative, and is based on the median leaching value of the soil map units that comprise each soil association. Leaching classes include: Excessive, High, Moderate, Somewhat Limited, Limited, and Very Limited. See ISGS EG 148 for the derivation of these classes. To provide a measure of leaching class variability within each association, leaching class range values were calculated. Four trimmed range values were determined for the leaching classes in each soil association to give an indication of the variability within a specific leaching class. This data set is necessary because each soil association could have only a single leaching class value assigned to it. This item was calculated by sorting the component soil series in order of their leaching characteristic within the association. The trimmed range is the domain of leaching characteristic values between the 90th and 10th quantiles in the sorted list.To reduce the impact of extreme leaching class values on this estimate, the the range values were trimmed so that the upper and lower 10% of values were not included in the calculation. These trimmed range values were used as an overprint on the published map of leaching classes (see cross reference entries). For example, a particular soil association may have pesticide leaching values that range from "Excessive" to "Somewhat Limited", with a median value of "Moderate". This soil association is assigned an overall leaching value of "Moderate", with a range of 4 (being the values Excessive, High, Moderate, and Somewhat Limited). The ISGS statewide Stack-Unit map was used to create a map of depth to the uppermost aquifer, which was then combined with the maps of nitrate and pesticide leaching classes to ultimately derive aquifer sensitivity to contamination by nitrate and pesticide leaching. Six aquifer sensitivity classes are indicated: Excessive, High, Moderate, Somewhat limited, Limited, and Very limited. Disturbed land and surface water areas are also shown. These data are to be used in conjunction with ISGS Environmental Geology report 148. Purpose: This data set was designed for statewide evaluation of agrichemical leaching characteristics and associated aquifer sensitivity to contamination. It was created to classify soils and aquifer settings according to predictions of leaching potential. The classifications have not been validated by the results of water quality sampling. Accordingly, the reliability of these aquifer sensitivity ratings as predictors of water quality has not been evaluated. These data are appropriate for use in regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The datasets were not and are not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS, the data have no legal basis in the definition of boundaries or property lines. Supplemental_Information: The feature classes includes county lines. These lines are not directly relevant to the data, but were originally necessary for technical reasons. Without the additional county lines, some of the polygons exceeded the maximum allowable vertex limit in ARCPLOT (ArcInfo Workstation 7.0.4). This problem was solved by the additional county lines, which serve to divide polygons with too many vertices into smaller units. Accordingly, to remove the county lines from maps created with ARCPLOT, the DROPLINE command must be used on conjunction with the COUNTY_NAME polygon item. In April 2004 the source coverages were transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated edition 20040413. Prior to this time the feature classes were stored as six separate coverages in the ISGS GISDB archive. The coverage referred to in this documentation as STACK-ST was subsequently imported to the ISGS enterprise (SDE) database and is now known as GISDB_QTGEO.IL_Stack_Units_Py. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.4244 East_Bounding_Coordinate: -87.3840 North_Bounding_Coordinate: 42.4951 South_Bounding_Coordinate: 36.9540 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: aquifer Theme_Keyword: groundwater Theme_Keyword: water Theme_Keyword: hydrology Theme_Keyword: hydrogeology Theme_Keyword: geology Theme_Keyword: soil Theme_Keyword: nitrate Theme_Keyword: pesticide Theme_Keyword: leaching Theme_Keyword: agriculture Theme_Keyword: contamination Theme_Keyword: leachate Place: Place_Keyword_Thesaurus: none Place_Keyword: Illinois Access_Constraints: none Use_Constraints: Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of DNR. Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR. Point_of_Contact: Contact_Information: Contact_Address: Address_Type: mailing address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-333-4747 Contact_Electronic_Mail_Address: isgs@isgs.uiuc.edu Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Contact_Organization_Primary: Contact_Organization: Groundwater Section, Illinois State Geological Survey Contact_TDD/TTY_Telephone: 217-785-0211 Native_Data_Set_Environment: ArcSDE 8.2 on Oracle 9i Cross_Reference: Citation_Information: Originator: Dennis P. McKenna and Donald A. Keefer Publication_Date: 1991 Title: Potential for Agricultural Chemical Contamination of Aquifers in Illinois Geospatial_Data_Presentation_Form: report Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1991-7R Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: 18p Cross_Reference: Citation_Information: Originator: Dennis P. McKenna and Donald A. Keefer Publication_Date: 1991 Title: Potential for Agricultural Chemical Contamination of Aquifers in Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1991-7S Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: Statewide map. Color. Scale, 1:500,000. (computer-generated map) Cross_Reference: Citation_Information: Originator: Dennis P. McKenna and Donald A. Keefer Publication_Date: 1991 Title: Potential for Agricultural Chemical Contamination of Aquifers in ... County Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1991-7C Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: Individual county maps. Black and white. Scale, 1:250,000. (computer-generated maps) Cross_Reference: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Nitrate Leaching Classes of Illinois Soils Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1995-2 Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: statewide map, scale 1:500,000 Cross_Reference: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Aquifer Sensitivity to Contamination by Nitrate Leaching in Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1995-3S Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: statewide map, scale 1:500,000 Cross_Reference: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Pesticide Leaching Classes of Illinois Soils Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1995-4 Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: statewide map, scale 1:500,000 Cross_Reference: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Aquifer Sensitivity to Contamination by Pesticide Leaching in Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1995-5S Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: statewide map, scale 1:500,000 Cross_Reference: Citation_Information: Originator: Donald A. Keefer Publication_Date: 1995 Title: Aquifer Sensitivity to Contamination by Pesticide Leaching in Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Open File Series (OFS) Issue_Identification: 1995-5C Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: county by county maps, scale 1:250,000 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This data set was created to classify soils and aquifer settings according to predictions of leaching potential. The classifications have not been validated by the results of water quality sampling. In addition, the use of these aquifer sensitivity ratings as predictors of water quality has not been evaluated. Nonuniform use of fertilizers might reduce the reliability of water quality predictions, which can only be validated by careful comparison with water quality data. Attributes assumed to be as accurate as the sources. The information produced from this data set passed the typical ISGS Peer Review associated with the publication of the ISGS EG 148. Logical_Consistency_Report: When in coverage form, polygon topology was present. Results of RESELECT logic were crossed checked in INFO using the FREQUENCY command and compared with source data to verify logical consistency of attribute values. Completeness_Report: All areas in Illinois are represented fully in regards to the scope of the modeling as described in ISGS EG 148. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Both the soil association map and the stack-unit map describe materials that are often highly variable over short distances (e. g., within 1 mile). Accordingly, the data set has been generalized to provide the most information possible without including too much detail for efficient use. For this data set, evaluations of areas smaller than a township (approximately 36 square miles) are not recommended in order to maintain a confidence level consistent with the published source maps. The accuracy of this map is insufficient for evaluating the probability of nitrate leaching at specific points. It is the responsibility of the user to determine the appropriateness of this map for specific applications. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Department of Agriculture Publication_Date: 1991 Title: State Soil Geographic Data Base (STATSGO) Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: UU.S. Department of Agriculture Natural Resources Conservation Service (formerly the Soil Conservation Service) Miscellaneous Publication Issue_Identification: No. 1492 Source_Scale_Denominator: 15000 Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: Detailed information describing many characteristics for each soil association and soil phase, and information on the extent of each soil phase within each soil association. Source_Information: Source_Citation: Citation_Information: Originator: Berg, R.C., and J.P. Kempton Publication_Date: 1988 Title: Stack-unit Mapping of Geologic Materials in Illinois to a Depth of 15 Meters Geospatial_Data_Presentation_Form: report with map plates Series_Information: Series_Name: ISGS Circular Issue_Identification: 542 Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: Detailed information describing many characteristics of geologic units using a recognized classification system partly based on interpretations of the average texture of each nonlithified (nonbedrock) unit and the average degree of cementation and fracturing of each bedrock unit. Source_Information: Source_Citation: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: 1995 Title: Stack-unit Mapping of Geologic Materials in Illinois to a Depth of 15 Meters Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS GIS Database Issue_Identification: stack-st Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Source_Scale_Denominator: 250000 Type_of_Source_Media: digital tape media Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: Lines, polygons and stack-unit designations. Process_Step: Process_Description: see Abstract and Purpose entries, and ISGS EG 184. Process_Date: 1995 Process_Step: Process_Description: The source coverages (no3aqsens, no3leach, no3lrange, pestaqsens, pestleach, pestlrange, all from workspace ../hydro) were imported into an ArcSDE enterprise geodatabase feature dataset for storage. Previously they were stored as individual coverages. The data were reprojected from the customary ISGS Lambert Conformal Conic projection (NAD27) to a geographic coordinate system (longitude, latitude) in decimal degrees (NAD83). The various coverage feature classes were imported using ArcCatalog 8.3. Some unnecessary data fields identifying county FIPS values were dropped. Prior to import, the spatial reference of the data set was changed to Geographic, decimal degrees, NAD83 in double precision. Also at this time, this metadata file was created. It is an amalgamation of the metadata files for the six source coverages. Process_Date: 20040413 Process_Contact: Contact_Information: Contact_Person_Primary: Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 9724 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 3663 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 1452 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 10213 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 3897 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 1209 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Please refer to the metadata of the respective feature classes for specifics on attributes and their values. Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Aquifer_NO3_Leach_Sens_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_NO3_Leach_Class_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_NO3_Leach_Class_Range_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Aquifer_Pest_Leach_Sens_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Pest_Leach_Class_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Pest_Leach_Class_Range_Py Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Instructions: Please refer to the dataset contact information. Distribution_Liability: The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR. Technical_Prerequisites: The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, the ESRI shapefile format can be imported into many different GIS software packages. It is expected that customers who order this data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind. Metadata_Reference_Information: Metadata_Date: 20040401 Metadata_Contact: Contact_Information: Contact_Instructions: Please refer to the dataset contact information. Contact_Organization_Primary: Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile