The District of Columbia

Underground storage tanks (USTPt)

Underground storage tanks (USTPt)

by Department of Health on 05/13/2006

Keywords
About: society, Tanks, Underground, Facility, environment, utilitiesCommunication
Taking place at: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Abstract

Underground Storage Tank (UST) locations. The dataset contains locations and attributes of Underground Storage Tanks, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies.

A database provided by the Environmental Health Administration - DC Underground Storage Tanks Management identified Underground Stroage Tank locations.

All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.

METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.

Purpose

This data is used for the planning and management of Washington, D.C. by local government agencies.

Access constraints

Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies.

Use constraints

Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Point of contact

GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm

Credits

Department of Health - Environmental Health Administration - DC Underground Storage Tanks Management

Data accuracy

Accuracy
Data believed to be complete and accurate, subject to change.

Logical consistency
In process of validation by source and/or responsible agency.

Completeness
Data believed to be complete and accurate, subject to change.

Horizontal positional accuracy
Most points geocoded to MAR which are placed at the approximate center of building polygons. Others are geocoded to the centerlines while the remainder are manually placed using the planimetrics and 2002 orthophoto as a guide.

Vertical positional accuracy
N/A

Lineage / Sources

Lineage / Processes
GIS Data Coordinator
in Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: 202-727-5660
hours: 8:30am - 5:30pm
Data recently completed by DCGIS was the Underground Storage Tank (UST) layer. In creating that DCGIS took data from DC Department of Health and mapped it. Upon review by DCStat staff, an issue concerning the addresses for UST licensees. The data are not tank locations, but rather licensee locations. The distinction is important for large facilities with multiple tanks. There are separate records or points for different types of material storage, but not for multiple tanks of the same material (i.e. 15 tanks collectively with four types of material would be four records, not 15). These may represent tanks with the same material scattered in different locations at a large facility like Fort McNair.

Where possible, the UST point was moved to match the corresponding Master Address Repository (MAR) point. Multiple points for a single address were collected to that single point.

This involved bringing the UST layer into ArcMap with a variety of other data layers useful for context: streets, buildings, MAR points, ownerpoints. Each UST point was reviewed and placed on the MAR point if one was available. No attempt was made to find actual tank locations, as this data lacks this level of precision.

Distribution

Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page. Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.

Distribution liability
Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Distributed by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm

Entity

DCGIS.USTPt / EHA
Underground Storage Tanks

Attributes

  • SHAPE / ESRI
    Feature geometry.
  • WEB_URL
  • OBJECTID / ESRI
    Internal feature number.
  • Shape / ESRI
    Feature geometry
  • Status / ESRI
    Geocoding Status
  • ALTFACILIT / EHA
    Alternate Facility
  • TANKID / EHA
    Tank Identification Number
  • NAME / EHA
    Organization
  • TANKSTATUS / EHA
    Tank Use Status
  • SUBSTANCED / EHA
    Substance Contained in Tank
  • TANKCAPACI / EHA
    Tank Capacity
  • FEDERALREG / EHA
    Federally Regulated
  • ADDRESS / EHA
    Facility Address
  • FAC_NAME / EHA
    Facility Name
  • DESCRIPTIO / EHA
    Description
  • STATUS
    Status of Underground Storage Tank
  • FAC_ID / EHA
    Facility Identification Number
  • GIS_ID
    OCTO GIS sequential identifier
  • OBJECTID_1 / ESRI
    Internal feature number.

Metadata

FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 12/14/2007

Provided by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

phone: REQUIRED: The telephone number by which individuals can speak to the organization or individual.
fax: (202) 727-5660
hours: 8:30 am - 5 pm