Summary Statement:

This metadata summary applies exclusively to the data as it appears in this Loudoun County intranet/internet mapping application. To see the fully FGDC compliant version of this metadata click here.

Abstract:

WELLPOLL is a data set of water wells and pollution sources in the county that have been identified and assigned a unique SITE-ID number. Drain fields are independent, private sewage disposal systems denoted with PSSD. Cemeteries are included as a potential groundwater and soil pollution source. Within this data set, the majority of wells are individual potable water wells and the majority of pollution sources are individual sewage disposal (septic/drain field) systems. Other types of wells and pollution sources, like cemeteries, also exist in the data and are listed and explained in the data dictionary. Note that all identified pollution sources are not necessarily causing pollution but, rather, can be simply a potential source of pollution. Information for wells comes primarily from State Groundwater Well Completion (GW2) forms completed by well drilling contractors and varies in accuracy and completeness. Information for pollution sources comes primarily from the Health Department permitting and inspection process and/or date of discovery from field verification.

Purpose:

WELLPOLL was created to provide an easily accessed record of wells and pollution sources and to link these sites to other geographic data within the GIS. For most records, specific construction information and other physical characteristics are available with the County. This information may be used to aid in the evaluation of the groundwater resource in the case of wells, or of certain types of observed or potential pollution problems in the case of pollution sources.

Supplemental Information:

The unique SITE ID number is composed of the four-letter ID-CODE (what the item is), the four-digit year of completion, and a four digit sequential cataloging number.

The WELLPOLL layer was developed in 1988 by the County’s Environmental Health Department. Records were entered into a database from 40 years of historical paper files, which exhibited a wide range of completeness and accuracy. This was an on-going process until early 1996 at which time the layer was no longer maintained. In late 2000, the Department of Building and Development began a process of updating the layer by entering data from the permit files, which had accumulated since 1996.

Data are stored in the corporate ArcSDE Geodatabase as a point feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN.

Maintenance and Update Frequency:

As Needed

Completeness Report:

Features may have been eliminated or generalized due to scale and intended use. To assist Loudoun County, Virginia in the maintenance of the data, please provide any information concerning discovered errors, omissions, or other discrepancies found in the data.

Note:

This data is incomplete. Wells and Pollution Sources may exist which are not yet displayed here. It is strongly recommended that onsite field review and other file searches be conducted prior to making any decisions pertaining to this data.

Code     Definition

PCEM  =   Cemetery
PHAZ  =   Hazardous waste storage
PSBD  =   Building (e.g. barn)
PSCS  =   Chemical storage tank

PSSD  =   Sewage disposal system

PSSW  =   Solid waste/landfill
PSTP  =   Sewage treatment plant
WWCO  =   Community well
WWCS  =   Community spring
WWDH  =   Dry well
WWDU  =   Dug well
WWHP  =   Heat pump well
WWID  =   Industrail well
WWIN  =   Individual well
WWIR  =   Irrigation well
WWNC  =   Non-community well
WWOB  =   Observation well
WWQM  =   Water quality monitoring well
WWSP  =   Spring
WWTS  =   Test well

Data Owner:

Health Department/Department of Building and Development