# CHEMPT

This page last updated: 07/25/2018
Metadata created using Minnesota Geographic Metadata Guidelines

Go to Section:

1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

## Section 1: Overview

Originator:Minnesota Department of Natural Resources
Title: CHEMPT
Abstract: Data includes wells sampled in Blue Earth County, Minnesota for natural chemistry of groundwater by DNR staff for major cations and anions, trace elements, tritium, and carbon-14.
Purpose: Blue Earth County Geologic Atlas, Part B, County Geologic Atlas Series C-26
Time Period of Content Date:
Currentness Reference: data were acquired or accessed between 2011 and 2012
Progress: Complete
Maintenance and Update Frequency: None Planned
Spatial Extent of Data: Blue Earth County, Minnesota
Bounding Coordinates: -94.9
-93.8
44.3
43.8
Place Keywords: Blue Earth County, Minnesota
Theme Keywords: groundwater, water chemistry, residence time, stable isotopes, wells
Theme Keyword Thesaurus: None
Access Constraints: None
Use Constraints: Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound hydrogeologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Browse Graphic: None available
Associated Data Sets: Blue Earth County Geologic Atlas, Part A, County Geologic Atlas Series C-26, published by the Minnesota Geological Survey, 2012. More information and downloadable data for Part A is available on the MGS data site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm

## Section 2: Data Quality

Attribute Accuracy: 1:100,000
Logical Consistency: Data are topologically correct using ArcGIS 10.2.2
Completeness: Complete
Horizontal Positional Accuracy: NA
Vertical Positional Accuracy: NA
Lineage: This file primarily contains well locations and associated inorganic and isotope chemistry sample analyses for wells sampled for the Blue Earth County Geologic Atlas, Part B. Some data are available in table format only (chempt_other).
Chemistry data are managed in a MS Access database. Excel tables of chemistry data are available online for download at http://www.dnr.state.mn.us/waters/groundwater_section/mapping/chemdataaccess.html

## Section 3: Spatial Data Organization (not used in this metadata)

## Section 4: Coordinate System

Horizontal Coordinate Scheme: Universal Transverse Mercator
UTM Zone Number: 15
Horizontal Datum: NAD83
Horizontal Units: meters
Vertical Datum:
Vertical Units:
Depth Datum:
Depth Units:

## Section 5: Attributes

Overview:
Detailed Citation:
Table Detail:

CHEMPT - well and lake locations and associated inorganic and isotope chemistry sample analyses for wells sampled for the Blue Earth County Geologic Atlas
Field Name | Valid Values | Definition | Definition Source
--- | --- | --- | ---
RELATEID | - | Four 0's followed by 6-digit unique number for wells, or the Lake ID from DNR Lakes Database + 2 digits for a site at a lake (01,02, etc.). |
AQUIFER | - | CWI aquifer code. The aquifers are identified as "CJDN", "CJDW","CJSL", "CMTS", "CSLT", "CTCG", "CTCW", "MTPL", "OPCJ","OPDC", QBAA", "QBUA". |
AQUIFER_Q | - | Quaternary aquifer name, usually mapped at county scale. The buried aquifers are identified as "s2","se", "sm", "st", or "su". Quaternary aquifers are named after surficial and buried sand units shown on Plate 4, Part A. Bedrock aquifers are represented by "bdrk". |
XSEC | - | Cross section line number from cross sections developed by the MGS for Part A sand grid model |
TRITIUM | - | Tritium in Tritium Units (TU). |
TRIT_AGE | - | Residence time estimated from tritium value. "cold war era" - greater than 15 TU, "recent" - 8 to 15 TU, "mixed" - greater than 1 TU and less than 8 TU, "vintage" - less than or equal to 1 TU |
CHLORIDE | - | Chloride concentration in milligrams per liter |
BROMIDE | - | Bromide concentration in milligrams per liter |
CL_BR | - | Chloride Bromide Ratio |
NITRATE_N | - | Nitrate concentration in milligrams per liter reported as Nitrogen |
DEUTERIUM | - | Deuterium (per mil) |
OXYGEN_18 | - | Oxygen-18 (per mil) |
ARSENIC | - | Arsenic in micrograms per liter |
DATASOURCE | - | Source of data |
SITETYPE | - | Type of site where water sample was collected. Site types are identified as "Lake", or "Well". |
C14_YEARS | - | Groundwater residence time in years, estimated by carbon-14 isotope analysis (model estimated age in years rounded to 1 significant digit) |

## Section 6: Distribution

Publisher: Minnesota Department of Natural Resources, Ecological and Water Resources Division
Publication Date: 05/02/2016
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Distributor's Data Set Identifier: CHEMPT
Distribution Liability: This map was prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map is based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data.
Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Ordering Instructions: Download zip file of metadata and feature classes by clicking "I AGREE" below.
PDFs of the Blue Earth County Geologic Atlas can be downloaded at: http://www.dnr.state.mn.us/waters/programs/gw_section/mapping/platesum/bluecga.html
Online Linkage: None available

## Section 7: Metadata Reference

Metadata Date: 07/25/2018
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Metadata Standard Name: Minnesota Geographic Metadata Guidelines
Metadata Standard Version: 1.2
Metadata Standard Online Linkage: http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm

This page last updated: 07/25/2018
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