DOCUMENTATION REPORT FOR GIS DATABASE:
DOCUMENTATION REPORT FOR GIS DATABASE:
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES) SITES WITHIN GEORGIA, PERMITTED
THROUGH DECEMBER 31, 1999
DEPARTMENT OF NATURAL RESOURCES
ENVIRONMENTAL PROTECTION DIVISION
GEOLOGIC SURVEY BRANCH
Atlanta
2000
DOCUMENTATION REPORT 00-21
TABLE OF CONTENTS
OVERVIEW
GLOSSARY
PART A General Description of the GIS Database
1.0 Identification / Project Background 1
2.0 Data Quality 1
2.1 Attribute Accuracy 1
2.2 Logical Consistency 2
2.3 Completeness 2
2.4 Positional Accuracy 2
2.5 Lineage 2
3.0 Spatial Data Organization Information 3
4.0 Spatial Reference Information 3
5.0 Entity and Attribute Information 3
6.0 Distribution Information. 4
7.0 Metadata Reference Information 4
Appendix. A. Signatures
Appendix. B. Figure One - Location Map for NPDES Sites Within Georgia, and Table One - Data for NPDES Sites Within Georgia as of 31 December 1999.
PART B Technical Description of the GIS Database
1.0 Identification Information 1
1.1 Citation 1
1.2 Description 1
1.3 Time Period of Content 2
1.4 Status 2
1.5 Spatial Domain 2
1.6 Keywords 2
1.7 Access Constraints 2
1.8 Use Constraints 2
1.9 Point of Contact 3
2.0 Data Quality 3
2.1 Attribute Accuracy 3
2.2 Logical Consistency Report 4
2.3 Completeness Report 4
2.4 Positional Accuracy 4
2.5 Lineage 4
3.0 Spatial Data Organization Information 11
3.1 Indirect Spatial Reference Method 11
3.2 Direct Spatial Reference Method 11
3.3 Point and Vector Object Information 11
4.0 Spatial Reference Information 12
4.1 Horizontal Coordinate System Definition 12
5.0 Entity and Attribute Information 12
5.1 Detailed Description 13
6.0 Distribution Information 16
6.1 Distributor 16
6.2 Resource Description 16
6.3 Distribution Liability 16
6.4 Ordering Process 16
7.0 Metadata Reference Information 16
7.1 Metadata Date 16
7.2 Metadata Review Date 16
7.4 Metadata Contact 16
7.5 Metadata Standard Name 16
7.6 Metadata Standard Version 16
PART C Digital Files Containing GIS Database
Summary of Contents of Data Diskettes envelope
OVERVIEW
A documentation report follows the "Content Standards for Digital Geospatial Metadata" (Standards) developed by the Federal Geographic Data Committee (FGDC), published December 8, 1994. As a convenience, Parts A and B employ the outline/headings contained in the Standards. Parts A and B are printed on paper and Part C is composed of digital products. Part B meets the technical requirements of the Standards.
This document is a three-part documentation report for a Geographic Information System (GIS) database developed, with Arc/Info software, by the Geologic Survey Branch, Environmental Protection Division of the Georgia Department of Natural Resources. Part A is intended as a general purpose summary of the database. Part B is a more technical section included primarily for the benefit of GIS processors. Part C contains the digital products, the database and associated documentation, which includes a copy of this publication.
The digital documentation in Part C contains two copies of this publication. One digital copy is stored as an ASCII file, DR0021.TXT. The other copy is in Word 97/2000 format, DR0021.DOC. The digital database in Part C consists of an Arc/Info Export file DR0021.E00. Copy the Arc/Info Export file into a directory where you want it and then run the Arc/Info Import command. See Part C of this document for a complete list of the diskette's contents.
Digital files are written to a 1.44 MB High Density data diskette. A file directory and a short explanation are contained in the ASCII file README.TXT on the data diskette.
This database was developed to satisfy specific project purposes. Users are advised to read the entire Documentation Report and to evaluate the suitability and limitations of the database for the user's purposes.
This Document and its GIS database describe the NPDES sites statewide through 31 December 1999 and it supercedes previous NPDES documentation reports for individual river basins.
GLOSSARY
Arc/Info: a popular GIS software, used by the Geologic Survey Branch.
ASCII: abbreviation for American Standard Code for Information Interchange. A set of codes for representing alphanumeric information in a format that any computer can read.
attribute: a characteristic of a geographic feature. For example, if the geographic feature is a river, then the attributes of the river are the river=s name, the flow rate, the chemical history, etc.
attribute accuracy: a measure of how well the reported characteristics actually match the real-world characteristics of a geographic feature.
Compact Disk Read-Only-Memory (CDROM): an optical media which can store 650 Mb of information.
completeness: a description of the relation between the items represented in the database and the real world. For example, for a database of water well information for Georgia, does it contain all the water wells in Georgia, or a defined subset of wells. If the database contains a defined subset of wells, does the database includes every well in Georgia that meets the definition by which the subset was chosen.
Content Standards for Digital Geospatial Metadata: the standard developed by the FGDC which specifies the information content of metadata for a set of digital geospatial data.
database: a logical collection of interrelated information, managed and stored as a unit on a computer or other storage media. A GIS database includes data about the spatial location and shape of geographic features recorded as points, lines, areas, and their attributes.
decimal degrees: a unit of measure for geographic coordinates. The conversion formula for decimal degrees is: Decimal Degrees = Degrees + Minutes/60 +Seconds/3600.
Department of Natural Resources (DNR): a department of the government of the State of Georgia.
differential correction: A technique used to improve positioning or navigation accuracy by determining the positioning error at a known location and subsequently incorporating a corrective factor (by real time transmission of corrections or by postprocessing) into the position calculations of another receiver operating in the same area and simultaneously tracking the same satellites.
digital: refers to the process of conversion of information into machine language so that a computer can read, write, store, and process the information.
Digital Line Graph (DLG): computer files from the USGS which contain digital maps of transportation, hydrography, contours, and public land survey boundaries.
digital maps: a map is an abstract representation of the physical features of part of the Earth's surface graphically displayed on a piece of paper. When that piece of paper is converted into a form which the computer can use, the map is then digital.
diskette: a storage medium, usually measuring 3.5 inches in diameter, which is used to store or transfer information from one computer to another.
Federal Geographic Data Committee (FGDC): an inter-governmental committee established through the Office of Management and Budget and charged with the responsibility to coordinate various surveying, mapping, and spatial data activities to meet the needs of the Nation.
Geographic Information System (GIS): an organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information.
label points: a single x,y coordinate which identifies an area, and holds a place in the database wherein the area's attribute information is stored.
latitude, longitude: a geographic reference system to locate positions on the Earth. Latitude and longitude are angles measured from the Earth's center to the position on the Earth's surface. Latitude is a measure of angles in a north-south direction, while longitude is a measure of angles in the east-west direction.
lineage: information about the events, parameters, and source data which constructed a geographic database, and information about the responsible parties.
logical consistency: an explanation of the fidelity of the relationships in the database. For example, for a geographic area, do the vector lines which create area boundaries join to encircle the area with no gaps? Or for example, for a particular attribute, are all the values given within a valid range?
longitude, latitude: see latitude, longitude.
metadata: information about the content, quality, condition, and other characteristics of a database.
National Map Accuracy Standards: a set of standards developed by the USGS which states the level of accuracy required for a map product of a particular scale.
pkzip: a popular data compression software.
positional accuracy: an assessment of how well the reported position of a geographic feature represents the real-world position.
United States Geological Survey (USGS): a branch of the United States Department of Interior.
vector lines: lines which are described by x,y coordinates and are commonly used to represent
linear geographic features. Each linear feature is represented as an ordered list of vertices.
Word: a popular word processing software.
PART A
GENERAL DESCRIPTION OF THE GIS DATABASE:
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES) SITES WITHIN GEORGIA, PERMITTED
THROUGH DECEMBER 31, 1999
1.0 Identification / Project Background
This database contains locations and associated information for 1187 National Pollutant Discharge Elimination System (NPDES) sites permitted within the state of Georgia. As a convenience to the reader of Part A, a page size statewide map of the NPDES site database is included in Appendix B - Figure 1. The 1999 data were compiled with data from six previously completed NPDES databases, which had been developed for most of the river basins in Georgia. As shown in Table One, Appendix B, the database includes the facility's permit number and name, the county name, the latitude and longitude coordinates (in degrees, minutes, and seconds) for either the facility's outfall pipe or sample point, NPDES type (municipal, industrial, or private), the name of the receiving waters for discharge, the major river basin name, the 8-digit U.S. Geological Survey hydrologic unit code (HUC) for the associated river basin, and the code describing the site occupied (S_O) at the facility while collecting GPS data. The facilities= GPS locations were obtained by the Geologic Survey Branch (GSB) personnel using a Trimble Navigation global positioning satellite (GPS) receiver for data collection while occupying a GPS site at the outfall pipe or the sample point. An alternate location was selected, if either of the previous two locations were inaccessible.
The uncorrected positional data were corrected for various errors inherent in GPS positional data by processing with differential correction software and the corrected coordinates were entered into the GIS database. The manufacturer's specification for the Trimble Navigation GPS receiver describes a horizontal positional accuracy of +/- 5 meters after differential corrections are applied.
This database is being published at a scale of 1:24,000, is current through 31 December 1999, and it supercedes previous NPDES documentation reports for individual river basins.
2.0 Data Quality
This section contains information about the lineage, positional accuracy, attribute accuracy, logical consistency, and completeness of the database.
2.1 Attribute Accuracy
Many attributes for this database were obtained from EPD's Watershed Protection Branch (WPB), and originated from their NPDES files. Attributes selected for use in the GIS database are the county name, the facility's permit number and name, river basin, NPDES type, and the name of the receiving waters. Attributes were reviewed for accuracy by comparison with source computer printouts and corrections made when errors were discovered. Before releasing the GIS database a representative of the WPB makes a final review of the data; see the appendix A, signature sheet following section Part A.
The NPDES site=s latitude-longitude coordinates were determined in the field using a Trimble Navigation GPS receiver for data collection while occupying either the facility's outfall pipe or sample point. If either of the previous locations were inaccessible, then an alternate location was selected. The uncorrected positional data was corrected for various errors inherent in GPS positional data by processing with differential correction software and then the corrected coordinates were entered into this GIS database. The manufacturer's specification for the Trimble Navigation GPS receiver states a horizontal positional accuracy of +/- 5 meters after differential corrections are applied.
Each facility location was overlaid on a 1:100,000 scale county boundary database, and a 1:250,000 scale U.S. Geological Survey river basin database. The county name, the major river basin name, and the HUC for the river basin where the facility is located were added into the GIS database by using the database overlay capability of the GIS software ARC/INFO (version 8.0.2).
The database is being published at a scale of 1:24,000.
2.2 Logical Consistency
The facility locations were overlaid with an existing county boundary database to check the spatial accuracy; to see if the facilities locations are within the correct county. Attributes in the database were reviewed for accuracy by comparing with source information and corrections made when errors were discovered.
2.3 Completeness
This database contains 1187 permitted NPDES sites found within Georgia. The database is current through 31 December 1999.
2.4 Positional Accuracy
Each facility=s latitude-longitude coordinates were determined in the field by GSB personnel using Trimble=s Navigation GPS receiver for data collection while occupying either the facility=s outfall, sample point, or alternate location. The uncorrected positional data were corrected for various errors inherent in GPS positional data by processing with differential correction software and the corrected coordinates were entered into the GIS database. The manufacturer's specification for the Trimble Navigation GPS receiver states a horizontal positional accuracy of +/- 5 meters after differential corrections have been applied. The database is being published at a scale of 1:24,000.
2.5 Lineage
The source information for this statewide NPDES database is a combination of 6 previous GIS databases whose extent was defined by river basins, and an up-to-data (as of 15 February 2000) computer printout of the EPD's Watershed Protection Branch NPDES database, that contained associated data for each facility. Data from the above sources were appended to create this current statewide GIS database. The reader is referred to the documentation reports in the Technical files at GSB for the previously developed databases, which are as follows:
DR96-28 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Chattahoochee-Flint
River Basins in Georgia, Permitted Through August 1994.
DR97-06 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Coosa-Tallapoosa and
Oconee River Basins in Georgia, Permitted Through August 1996.
DR98-15 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Savannah-Ogeechee
River Basins in Georgia, Permitted Through August 1996.
DR99-05 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Ocmulgee River
Basin in Georgia, Permitted Through December 1998.
DR99-06 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Satilla, St. Marys,
Suwannee, and Ochlocknee River Basins in Georgia, Permitted Through January 1999.
DR99-11 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Altamaha River
Basin in Georgia, Permitted Through January 1999.
GSB personnel copied the county name, the facility's permit number and name, river basin name, NPDES type, the name of the receiving waters from the WPB computer printout for each facility and manually entered the data onto a field data sheet. Field data sheets were taken to the facility, where a GPS file name, date, time, location occupied, an uncorrected latitude-longitude coordinate (read from the GPS receiver), and other miscellaneous field notes were recorded. Back in the Office the data from the field data sheets were typed into a Quattro Pro spreadsheet.
During GPS processing the GPS data receiver files were downloaded in the office into a personal computer, and differential correction post-processing was carried out on the data files using Trimble Navigation's PATHFINDER OFFICE version 2.01 software. Base station data for post-
processing differential correction was obtained from the US Department of Agriculture, Forest Service Trimble base station located on top of the Southern Region Office at 1720 Peachtree Rd., Atlanta Georgia. The base station data is available and downloadable via the Internet http://www.fs.fed.us/database/gps/atlanta.htm. The differentially corrected latitude-longitude coordinate was written onto a copy of the field data sheet and compared to the uncorrected GPS coordinate collected in the field. In addition, the entries made in the Quattro Pro spreadsheet were compared to the GPS field sheets. Corrections were made if needed and then the field.
The information from the six previously developed NPDES databases, and information for the NPDES sites, which are not included in the six databases, but were permitted as of 31 December 1999, were appended together to make a master dBase file for the 1999 NPDES database.
This master dBase file was transferred to an NT workstation where the master file was processed in ARC/INFO (version 8.0.2) software by an EPA-written program, dbf2cover, to create a geographic database, with each facility represented digitally as a point.
Then the NPDES facility data were electronically overlaid on a 1:100,000 scale county boundary database, and a 1:250,000 scale U.S. Geological Survey river basin database. The correct county name, river basin name, and HUC were then automatically assigned to the GIS database by the Arc/info software, based on the corrected GPS latitude-longitude coordinate of the facility.
3.0 Spatial Data Organization Information
This database contains the locations for the 1187 permitted NPDES sites found within the state of Georgia. Each facility is represented digitally as an individual point.
4.0 Spatial Reference Information
This database is stored in the Albers Conic Equal Area projection with units in meters. Further information on the specific parameters used can be found in Part B, Section 4.0.
5.0 Entity and Attribute Information
Each data record in the GIS database has ten attributes detailing pertinent information about the NPDES site. Information includes the facility's name and permit number, NPDES type (municipal, industrial, or private), receiving waters, the county name, latitude and longitude coordinates (in degrees, minutes, and seconds) for the facility's outfall, sample point or other location, the major river basin where facility is found, the U.S. Geological Survey 8-digit HUC associated with the major river basin, and a code describing the location occupied at the facility while collecting GPS data (e.g., outfall, sample point, or other).
6.0 Distribution Information
This database is maintained by the Geologic Survey Branch, in their Technical Files, referenced as National Pollutant Discharge Elimination System (NPDES) Sites Within Georgia, Permitted Through December 1999.
7.0 Metadata Reference Information
The metadata is incorporated within this publication, DOCUMENTATION REPORT 00-21. Part B, the Technical Section of this publication, meets the "Content Standards for Digital Geospatial Metadata" as published by the Federal Geographic Data Committee in 1994.
APPENDIX A.
SIGNATURES
APPENDIX A
SIGNATURES for the GIS Database:
NPDES Sites Within Georgia,
Permitted Through 31 December 1999
Preparation of Database and Documentation Report
Prepared by: _________________________(Signed) ___________________
David R. Hipple (Date Signed)
Senior Geologist
Checked by: _________________________(Signed) ___________________
Vicki Trent (Date Signed)
Senior Geologist
********************
DATA SOURCE
Prepared by: ________________________ (Signed) ___________________
David Hipple: (Date Signed)
Senior Geologist
Checked by: ________________________ (Signed) ___________________
Michael Berry (Date Signed)
Environmental Specialist II
Checked by: ________________________ (Signed) ____________________
Wayne Lunsford (Date Signed)
______________________________(Title)
********************
AUTHORIZATION
The Geologic Survey Branch of the Environmental Protection Division of the Georgia Department of Natural Resources approves of the release of the GIS database as presented in Parts A, B, and C of the accompanying documentation report.
Reviewed by: ________________________ (Signed) ______________________
B. Roger Carter (Date Signed)
Assistant Branch Chief
APPENDIX B.
Figure One and Table One
PART B
TECHNICAL DESCRIPTION OF THE GIS DATABASE:
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES) SITES WITHIN GEORGIA, PERMITTED
THROUGH DECEMBER 31, 1999
1.0 Identification Information
1.1 Citation
8.1 Originator: Geologic Survey Branch
8.2 Publication Date: 2000
8.4 Title: DOCUMENTATION REPORT 00-21
National Pollutant Discharge System, (NPDES) Sites Within Georgia, Permitted
Through December 1999.
8.5 Edition: Version 1
8.6 Geospatial Data
Presentation Form: Point Digital Data
8.8.1 Publication Place: Atlanta, Georgia
8.8.2 Publisher: Georgia Geologic Survey
8.10 Online Linkage: techguide.html
1.2 Description
1.21 Abstract:
This database contains locations and associated information for 1187 National Pollutant Discharge System (NPDES) sites within the state of Georgia permitted by the Georgia Environmental Protection Division (EPD). As a convenience to the reader of Part A, a page size statewide map of the NPDES site database is included in Appendix B - Figure 1. The 1999 data were compiled with data from 6 previously completed NPDES databases, which had been developed for most of the river basins in Georgia. As shown in Table One, Appendix B, the database includes the facility's permit number and name, the county name, the latitude and longitude coordinates (in degrees, minutes, and seconds) for either the facility's outfall pipe or sample point, NPDES type (municipal, industrial, or private), the name of the receiving waters for discharge, the major river basin name, the 8-digit U.S. Geological Survey hydrologic unit code (HUC) for the associated river basin, and the code describing the site occupied (S_O) at the facility while collecting GPS data. The facilities= GPS locations were obtained by the Geologic Survey Branch (GSB) personnel using a Trimble Navigation global positioning satellite (GPS) receiver for data collection while occupying a GPS site at the outfall pipe or the sample point. An alternate location was selected, if either of the previous two locations were inaccessible.
The uncorrected positional data were corrected for various errors inherent in GPS positional data by processing with differential correction software and the corrected coordinates were entered into the GIS database. The manufacturer's specification for the Trimble Navigation GPS receiver, describes a horizontal positional accuracy of +/- 5 meters after differential corrections are applied.
The database is being published at a scale of 1:24,000, is current through 31 December 1999, and it supercedes previous NPDES documentation reports for individual river basins.
1.2.2 Purpose:
This GIS database was developed for the Environmental Protection Division for use in analysis to support EPD's environmental protection programs.
1.3 Time Period of Content
1.3.1 Currentness Reference:
9.1.1 Calendar Date: current through 31 December 1999
1.4 Status
1.4.1 Progress: Complete
1.4.2 Update Frequency: as needed
1.5 Spatial Domain
1.5.1 Bounding Coordinates
1.5.1.2 West Bounding Coordinate: -85 29 45.6
1.5.1.3 East Bounding Coordinate: -80 45 14.4
1.5.1.3 North Bounding Coordinate: 34 58 58.8
1.5.1.4 South Bounding Coordinate: 30 40 19.2
1.6 Keywords
1.6.1 Theme
1.6.1.1 Theme Keyword Reference: GEOREF Thesaurus and Guide to
Indexing, Second Edition. 1978. American Geological Institute.
1.6.1.2a Theme Keyword: discharge
1.6.1.2b Theme Keyword: water recovery
1.6.1.2c Theme Keyword: effluent
1.6.1.2d Theme Keyword: resources
1.6.2 Place
1.6.2.2a Place Keyword: GA
1.6.2.2b Place Keyword: Georgia
1.6.2.2c Place Keyword: USA
1.7 Access Constraints: Distribution constraints, see 1.9
1.8 Use Constraints:
The Georgia Geologic Survey Branch should be acknowledged as the data source in products derived from these data.
This data set is not designed for use as a primary, regulatory tool in permitting or siting decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, local regulatory bodies, private individuals or organizations are not to reassign to the Georgia Geologic Survey Branch any authority for the decisions that they make.
This data set is not intended for map scales greater than 1:24000. Photographic or digital enlargement of these maps to scales greater than that for which they were originally mapped can cause misinterpretation of the data. The use of these data does not eliminate the need for onsite sampling, testing, and detailed study of specific sites for intensive uses. Therefore, these data and their interpretations are intended for planning purposes only. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.
1.9 Point of Contact
10.1.1 Contact Person: Information Geologist
10.1.2 Contact Organization: Geologic Survey Branch
10.3 Contact Position: Information Geologist
10.4. Contact Address
10.4.2a Address: Agriculture Building, Rm. 400
10.4.2b Street: 19 Martin Luther King, Jr. Drive, SW
10.4.3 City: Atlanta
10.4.4 State: Georgia
10.4.5 Postal Code: 30334
10.4.6 Country: USA
10.5 Contact Voice Telephone: (404) 657-6127
10.7 Contact Facsimile Telephone: (404) 657-8379
10.8 Contact Electronic Mail Address: Info_Geologist@mail.dnr.state.ga.us
10.9 Hours of Service: 8:00 a.m. - 4:30 p.m. EST
2.0 Data Quality
2.1 Attribute Accuracy
2.1.1 Attribute Accuracy Report:
Many attributes for this database were obtained from EPD's Watershed Protection Branch (WPB), and originated from their NPDES files. Attributes selected for use in the GIS database are the county name, the facility's permit number and name, river basin, NPDES type, and the name of the receiving waters. Attributes were reviewed for accuracy by comparison with source computer printouts and corrections made when errors were discovered. Before releasing the GIS database a representative of the WPB makes a final review of the data; see the appendix A, signature sheet following section Part A.
The NPDES site=s latitude-longitude coordinates were determined in the field using a Trimble Navigation GPS receiver for data collection while occupying either the facility's outfall or sample point. If either of the previously mentioned locations were inaccessible then an alternate location was selected. The uncorrected positional data were corrected for various errors inherent in GPS positional data by processing with differential correction software and then the corrected coordinates were entered into this GIS database. The manufacturer's specification for the Trimble Navigation GPS receiver states a horizontal positional accuracy of +/- 5 meters after differential corrections are applied.
The facility location was overlaid on a 1:100,000 scale county boundary database, and a 1:250,000 scale U.S. Geological Survey river basin database. The county name, the major river basin name, and the hydrologic unit code for the river basin where the facility is found were added into the GIS database by using a database overlay capability of the GIS software ARC/INFO (version 8.0.2).
The database is being published at a scale of 1:24,000.
2.2 Logical Consistency Report:
Facility locations were overlaid with an existing county political boundary database to ensure spatial accuracy, and positional corrections were made when errors were discovered. Attributes were reviewed for accuracy by comparison with source computer printouts and corrections made when errors were discovered.
2.3 Completeness Report:
This database contains 1187 permitted NPDES discharge points found within Georgia. The database is current through December 1999.
2.4 Positional Accuracy:
NPDES site=s latitude-longitude coordinates were determined in the field by GSB personnel using a Trimble Navigation GPS receiver for data collection while occupying either the facility=s outfall, sample point, or an alternate location. The uncorrected positional data were corrected for various errors inherent in GPS positional data by processing with differential correction software and the corrected coordinates were entered into a GIS database. The manufacturer's specifications for the Trimble Navigation receiver state a horizontal positional accuracy of +/- 5 meters after differential corrections have been applied. The database is being published at a scale of 1:24,000.
2.5 Lineage
2.5.1 Source Information:
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Alhadeff, S. Jack
2.5.1.1.8.2 Publication Date: 1996
2.5.1.1.8.4 Title: County Boundaries of Georgia
2.5.1.1.8.5 Edition: 1
2.5.1.1.8.6 Geospatial Data Presentation Form: GIS Database/Text
2.5.1.1.8.7 Series Information:
2.5.1.1.8.7.1 Series Name: digital data series
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: U.S. Geological Survey
2.5.1.1.8.10 Online Linkage: http://csat.gatech.edu/csat/statewide/statewide.html
2.5.1.2 Source Scale Denominator: 100,000
2.5.1.3 Type of Media: machine-readable files
2.5.1.5 Source Citation Abbreviation: USGS CO
2.5.1.6 Source Contribution: used for county name and QA/QC of the NPDES statewide database.
2.5.2 Process Step: see Online Linkage above, 2.5.1.1.8.10
2.5.1 Source Information:
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Alhadeff, S. Jack
2.5.1.1.8.2 Publication Date: 1996
2.5.1.1.8.4 Title: Hydrologic Units of Georgia
2.5.1.1.8.5 Edition: 2
2.5.1.1.8.6 Geospatial Data Presentation Form: GIS Database/Text
2.5.1.1.8.7 Series Information:
2.5.1.1.8.7.1 Series Name: data series
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: U.S. Geological Survey
2.5.1.1.8.10 Online Linkage: http://csat.gatech.edu/csat/statewide/statewide.html
2.5.1.2 Source Scale Denominator: 250000
2.5.1.3 Type of Media: machine-readable files
2.5.1.5 Source Citation Abbreviation: USGS HUC
2.5.1.6 Source Contribution: used for river basin QA/QC of NPDES
statewide database and source for HUC
2.5.2 Process Step: see Online Linkage above, 2.5.1.1.8.10
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: United States Department of Agriculture,
Forest Service, Southern Region,
2.5.1.1.8.2 Publication Date: Hourly (06:00 - 20:00 via Web site)
2.5.1.1.8.4 Title: Atlanta, Georgia GPS Base Station
2.5.1.1.8.6 Geospatial Data Presentation Form: Trimble .SSF format
computer files
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA (via web site)
2.5.1.1.8.8.2 Publisher: USDA Forest Service, Southern Region
2.5.1.1.8.10 Online Linkage: http://www.fs.fed.us/database/gps/atlanta.htm
2.5.1.3 Type of Source Media: online machine-readable files
2.5.1.5 Source Citation Abbreviation: USFS GPS
2.5.1.6 Source Contribution: Publish Trimble.SSF format data for use in applying differential corrections to GPS data.
2.5.2 Process Step: see above Online Linkage, 2.5.1.1.8.10
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: United States Government, Environmental Protection Agency, Region 10, Seattle, WA.
2.5.1.1.8.2 Publication Date: July 13, 1998 (via Web site)
2.5.1.1.8.4 Title: EPA Region 10 DBF@INFO Utilities
2.5.1.1.8.5. Edition: Version 5.7
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Seattle, WA (via web site)
2.5.1.1.8.8.2 Publisher: EPA, Region 10
2.5.1.1.8.10 Online Linkage: http://www.epa.gov/r10earth/dbf2info.html
2.5.1.3 Type of Source Media: online machine-readable files
2.5.1.5 Source Citation Abbreviation: EPA
2.5.1.6 Source Contribution: The program converts a dBase file directly into a GIS point database/coverage
2.5.2 Process Step: see above Online Linkage, 2.5.1.1.8.10
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1996
2.5.1.1.8.4 Title: National Pollutant Discharge Elimination System (NPDES) Sites Within the Chattahoochee-Flint River Basins in Georgia Permitted Through August 1996 Documentation Report 96-28.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR96-28
2.5.1.6 Source Contribution: NPDES data for the Chattahoochee-Flint
River Basin.
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1997
2.5.1.1.8.4 Title: National Pollutant Discharge Elimination System
NPDES) Sites Within the Coosa-Tallapoosa and Oconee River Basins in Georgia Permitted Through August 1996 - Documentation Report
97-06.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR97-06
2.5.1.6 Source Contribution: NPDES data within the Coosa-Tallapoosa and Oconee River Basins.
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1998
2.5.1.1.8.4 Title: National Pollutant Discharge Elimination System (NPDES) Sites Within the Savannah-Ogeechee River Basins in Georgia Permitted Through August 1998 - Documentation Report 98-15.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR98-15
2.5.1.6 Source Contribution: NPDES data for the Savannah-Ogeechee river basins.
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1999
2.5.1.1.8.4 Title: NPDES Within the National Pollutant Discharge Elimination System (NPDES) Sites Within the Ocmulgee River Basin in Georgia Permitted Through December 1998 - Documentation Report: 99-05.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR99-05
2.5.1.6 Source Contribution: NPDES data for the Ocmulgee River Basin.
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1999
2.5.1.1.8.4 Title: NPDES Within the National Pollutant Discharge Elimination System (NPDES) Sites Within the Satilla, St. Marys, Suwannee, and Ochlocknee River Basins in Georgia, Permitted Through 31 January 1999 B Documentation Report: 99-06.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR99-06
2.5.1.6 Source Contribution: NPDES data for the Satilla, St. Marys, Suwannee, and Ochlocknee River Basins in Georgia
2.5.1 Source Information
2.5.1.1 Source Citation:
2.5.1.1.8.1 Originator: Geologic Survey Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.1.8.2 Publication Date: 1999
2.5.1.1.8.4 Title: NPDES Within the National Pollutant Discharge Elimination System (NPDES) Sites Within the Altamaha River Basin in Georgia Permitted Through January 1999 - Documentation Report: 99-11.
2.5.1.1.8.6 Geospatial Data Presentation Form: Point Digital Data
2.5.1.1.8.8 Publication Information:
2.5.1.1.8.8.1 Publication Place: Atlanta, GA
2.5.1.1.8.8.2 Publisher: Geologic Survey Branch
2.5.1.2 Source Scale Denominator: 24000
2.5.1.3 Type of Source Media: Disc
2.5.1.5 Source Citation Abbreviation: DR99-11
2.5.1.6 Source Contribution: NPDES data for the Altamaha River Basin.
2.5.1 Source Information
2.5.1.1 Source Citation: Watershed Protection Branch, Georgia Environmental Protection Division, Georgia Department of Natural Resources
2.5.1.2 Source Scale Denominator: 24,000
2.5.1.3 Type of Source Media: Georgia Watershed Protection Branch permit files and computer data file
2.5.1.5 Source Citation Abbreviation: WPB
2.5.1.6 Source Contribution: Provided computer printouts from WPB's files which contained information for permitted NPDES sites as of 12/31/99. The printouts included the county name, the facility's permit number and name, river basin, NPDES type, and the name of the receiving waters.
2.5.1 Source Information
2.5.1.1 Source Citation: Georgia Environmental Protection Division, Watershed Protection Branch
2.5.1.2 Source Scale Denominator: 24,000
2.5.1.3 Type of Source Media: GPS data files and field data sheets
2.5.1.5 Source Citation Abbreviation: GSB
2.5.1.6 Source Contribution: GSB personnel collected the GPS positional information, compiled the information from the WPB computer printouts, and processed the data into an Arc/Info GIS database, and then documented the database according to GSB standards.
2.5.2a Process Information:
Procedures used to create or automate data:
The source information for this statewide NPDES database is a combination of 6 previous GIS databases whose extent was defined by river basin, and an up-to-data (December 1999) computer printout of the EPD's Watershed Protection Branch NPDES database, which contained associated data for each facility. Data from the above sources were appended to create this current statewide GIS database. The reader is referred to the documentation reports in the Technical files at GSB for the previously developed databases, which are as follows:
DR96-28 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Chattahoochee-Flint River Basins in Georgia, Permitted Through August 1994.
DR97-06 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Coosa-Tallapoosa and Oconee River Basins in Georgia, Permitted Through August 1996.
DR98-15 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Savannah-Ogeechee River Basins in Georgia, Permitted Through August 1996.
DR99-05 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Ocmulgee River
Basin in Georgia, Permitted Through December 1998.
DR99-06 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Satilla, St. Marys, Suwannee, and Ochlocknee River Basins in Georgia, Permitted Through January 1999.
DR99-11 - - National Pollutant Discharge Elimination System (NPDES) Sites Within the Altamaha River
Basin in Georgia, Permitted Through January 1999.
These computer data files contain information for all the permitted NPDES sites in the state. For the sites not previously visited and GPSed the printout provided the following data: the county name, the facility's permit number and name, river basin, NPDES type, and the name of the receiving waters. These data were copied from the source information by GSB personnel and manually entered onto field data sheets. Geologic Survey Branch field personnel visited each NPDES site with a Trimble GPS receiver, with instructions to occupy the facility=s outfall, sample point, or an alternate location if either of the other locations were inaccessible. The field personnel added the following information to the field data sheets while at each facility: the GPS file name, date, time, county name, the site=s address, receiving waters, the river basin name, the actual site occupied during the GPS data collection, and the uncorrected latitude-longitude coordinate read from the GPS receiver. Files in the GPS receiver were downloaded in the office directly into a personal computer. Trimble's PATHFINDER OFFICE software, version 2.01 for Windows, was used for differential correction post-processing. GPS Base station data for post-processing differential correction were obtained from the US Department of Agriculture, Forest Service Trimble base station located on top of the Southern Region Office at 1720 Peachtree Rd., Atlanta Georgia. The base station data is available and downloadable via the Internet, http://www.fs.fed.us/database/gps/atlanta.htm. GPS receiver data were differentially corrected using the NAD27 geodetic datum and output into an ASCII file. The differentially corrected latitude-longitude coordinate was written on the field data sheet and compared to the uncorrected coordinate collected in the field. Data from the field data sheets were typed into a Quattro Pro spreadsheet.
The information from the six previously developed NPDES databases, and information for the NPDES sites, which are not included in the six databases, but were permitted as of 31 December 1999, were appended together to make a master dBase file for the 1999 NPDES data. This master dBase file was transferred to an NT workstation where the master file was processed in ARC/INFO (version 8.0.2) software by an EPA-written program, dbf2cover, http: //www.epa.gov/r10earth/dbf2info.html. This program converts a dBase file directly into a GIS database/coverage with each facility represented digitally as a point.
The facility data were electronically overlaid on a 1:100,000 scale county boundary database, USGS CO, and a 1:250,000 scale U.S. Geological Survey river basin database, USGS HUC. The correct county name, river basin name, and HUC were then automatically added to the GIS database by using a database overlay capability of the GIS software (ARC/INFO version 8.0.2), based on the corrected GPS latitude-longitude coordinate of the facility.
3.0 Spatial Data Organization Information:
3.1 Indirect Spatial Reference Method: dms
3.2 Direct Spatial Reference Method: entity point
3.3 Point and Vector Object Information
3.3.1 SDTS Terms Description:
3.3.1.1 Object Type: point
3.3.1.2 Object Count: 1187
3.3.1.1 Object Type: Universe Polygon
3.3.1.2 Object Count: 1
4.0 Spatial Reference Information:
4.1 Horizontal Coordinate System Definition: planar
4.1.2.1.1.1 Map Projection Name: Albers Conic Equal Area
4.1.2.1.2 Map Projection Parameters
4.1.2.1.2.1a Standard Parallel 29 30 00
4.1.2.1.2.1b Standard Parallel 45 30 00
4.1.2.1.2.2 Longitude of Central Meridian -83 30 00
4.1.2.1.2.3 Latitude of Projection Origin 23 00 00
4.1.2.1.2.4 False Easting 0
4.1.2.1.2.5 False Northing 0
4.1.2.4.1 Planar Coordinate Encoding Method coordinate pair
4.1.2.4.2 Coordinate Representation
4.1.2.4.2.1 Abscissa Resolution .1
4.1.2.4.2.2 Ordinate Resolution .1
4.1.2.4.2.4Planar Distance Units meters
4.1.4 Geodetic Model
4.1.4.1 Horizontal Datum Name: North American Datum of 1927 (NAD27)
4.1.4.2Ellipsoid Name: Clarke 1866
4.1.4.3 Semi-major Axis: 6378206.4
4.1.4.4 Denominator of Flattening Ratio: 294.98
5.0 Entity and Attribute Information:
Overview:
DATAFILE NAME: DR0021.PAT
15 ITEMS: STARTING IN POSITION
COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 DR0021# 4 5 B -
13 DR0021-ID 4 5 B -
17 RECORD 9 7 C -
24 PERMIT_NO 12 11 C -
35 LAT_DMS 11 10 C -
45 LONG_DMS 11 10 C -
55 FACILITY 43 43 C -
98 REC_WATERS 39 39 C -
137 TYPE 7 4 C -
141 S_O 5 3 C -
144 COUNTY 20 15 C -
159 HUC 10 8 C -
167 BASIN 16 13 C -
5.1 Detailed Description
5.1.1 Entity Type
5.1.1.1 Entity Type Label: DR0021.PAT
5.1.1.2 Entity Type Definition: point attribute table
5.1.2 Attribute
5.1.2.1 Attribute Label: AREA
5.1.2.2 Attribute Definition: Area of each polygon, measured in coverage units.
5.1.2.3 Attribute Definition Source: Understanding GIS - The Arc/Info Method, by ESRI, pg. 5-9.
5.1.2.4 Attribute Domain Value: 4 character, floating-point (decimal) binary number; 0 value for a point coverage.
5.1.2 Attribute
5.1.2.1 Attribute Label: PERIMETER
5.1.2.2 Attribute Definition: Length of each polygon boundary, measured in coverage units.
5.1.2.3 Attribute Definition Source: Understanding GIS - The Arc/Info Method, by ESRI, pg. 5-9.
5.1.2.4 Attribute Domain Value: 4 character, floating-point (decimal) binary number; 0 value for a point coverage.
5.1.2 Attribute
5.1.2.1 Attribute Label: DR0021#
5.1.2.2 Attribute Definition: An internal point number assigned by ARC/INFO.
5.1.2.3 Attribute Definition Source: Understanding GIS - The Arc/Info Method, by ESRI, pg. 5-9.
5.1.2.4 Attribute Domain Value: 4 character, binary number.
5.1.2 Attribute
5.1.2.1 Attribute Label: DR0021-ID
5.1.2.2 Attribute Definition: User-id (assigned by the user)
5.1.2.3 Attribute Definition Source: Understanding GIS - The Arc/Info Method, by ESRI, pg. 5-9.
5.1.2.4 Attribute Domain Value: 4 character, binary number
5.1.2.1 Attribute Label: RECORD
5.1.2.2 Attribute Definition: A unique number used to identify a specific data record in the database. Originated as the line number in the Quattro Pro spreadsheet.
5.1.2.4 Attribute Domain Value: 9 character, Integer.
5.1.2 Attribute
5.1.2.1 Attribute Label PERMIT_NO
5.1.2.2 Attribute Definition: an identification number assigned to a
NPDES site by EPD.
5.1.2.4 Attribute Domain Values: 12 character
5.1.2 Attribute
5.1.2.1 Attribute Label: LAT_DMS
5.1.2.2 Attribute Definition: north latitudes coordinate of the NPDES sites= location.
5.1.2.4 Attribute Domain Values: 11 character
5.1.2.5 Attribute Units of Measurement: degree, minutes, and seconds
5.1.2 Attribute
5.1.2.1 Attribute Label: LONG_DMS
5.1.2.2 Attribute Definition: west longitude coordinate of the NPDES
sites= location.
5.1.2.4 Attribute Domain Values: 11 character
5.1.2.5 Attribute Units of Measurement: degree, minutes, and seconds
5.1.2 Attribute
5.1.2.1 Attribute Label: FACILITY
5.1.2.2 Attribute Definition: NPDES site=s name or permit-holder
5.1.2.4 Attribute Domain Values: 43 character
5.1.2 Attribute
5.1.2.1 Attribute Label: REC_WATERS
5.1.2.2 Attribute Definition: Receiving waters for the discharge
5.1.2.4 Attribute Domain Values: 39 character
5.1.2 Attribute
5.1.2.1 Attribute Label: TYPE
5.1.2.2 Attribute Definition: type of NPDES
5.1.2.4 Attribute Domain Values: 7 character
5.1.2.4.1 Enumerated Domain:
5.1.2.4.1.1 Enumerated Domain Value: M
5.1.2.4.1.2 Enumerated Domain Value Definition: municipal
5.1.2.4.1.1 Enumerated Domain Value: I
5.1.2.4.1.2 Enumerated Domain Value Definition: industrial
5.1.2.4.1.1 Enumerated Domain Value: F
5.1.2.4.1.2 Enumerated Domain Value Definition: federal
5.1.2.4.1.1 Enumerated Domain Value: P
5.1.2.4.1.2 Enumerated Domain Value Definition: private
5.1.2 Attribute
5.1.2.1 Attribute Label: S_O
5.1.2.2 Attribute Definition: Site occupied by the GPS unit during data collection.
5.1.2.4 Attribute Domain Values: 5 character
5.1.2.4.1 Enumerated Domain:
5.1.2.4.1.1 Enumerated Domain Value: OF
5.1.2.4.1.2 Enumerated Domain Value Definition: Outfall
5.1.2.4.1.1 Enumerated Domain Value: SP
5.1.2.4.1.2 Enumerated Domain Value Definition: Sample Point
5.1.2.4.1.1 Enumerated Domain Value: OT
5.1.2.4.1.2 Enumerated Domain Value Definition: Other
5.1.2 Attribute
5.1.2.1 Attribute Label: COUNTY
5.1.2.2 Attribute Definition: Name of county where NPDES site is
located
5.1.2.4 Attribute Domain Values: 20 character
5.1.2 Attribute
5.1.2.1 Attribute Label: HUC
5.1.2.2 Attribute Definition: U.S. Geological Survey hydrologic unit code for the river basin in which the
NPDES site is located
5.1.2.4 Attribute Domain Values: 10 character
5.1.2 Attribute
5.1.2.1 Attribute Label: BASIN
5.1.2.2 Attribute Definition: river basin in which the NPDES site is
located
5.1.2.4 Attribute Domain Values: 16 character
6.0 Distribution Information:
6.1 Distributor: See Point of Contact, 1.9
6.2 Resource Description: DOCUMENTATION REPORT 00-21
6.3 Distribution Liability: Users must assume responsibility to evaluate the usability of this data for their purposes.
6.4 Ordering Process: Contact the Geologic Survey Branch, see 1.9
7.0 Metadata Reference Information:
7.1 Metadata Date: 2000
7.2 Metadata Review Date: See signature sheet.
7.4 Metadata Contact:
10.1.1 Contact Person: David Hipple
10.1.2 Contact Organization Geologic Survey Branch
10.3 Contact Position: Senior Geologist
10.4 Contact Address
10.4.2 Address: 19 Martin Luther King, Jr. Dr. SW
10.4.3 City: Atlanta
10.4.4 State: Georgia
10.4.5 Postal Code: 30334
10.4.6 Country: USA
10.5 Contact Voice Telephone: (404) 656-3214
10.7 Contact Facsimile Telephone: (404) 657-8379
10.8 Contact Electronic Mail Address: David_Hipple@mail.dnr.state.ga.us
10.9 Hours of Service: 8:00 a.m. - 4:30 p.m. EST
7.5 Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
7.6 Metadata Standard Version: 6/8/94
PART C
THE DIGITAL FILES CONTAINING THE GIS DATABASE:
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES) SITES WITHIN GEORGIA, PERMITTED
THROUGH DECEMBER 31, 1999
SUMMARY STATEMENT AND DESCRIPTION OF THE CONTENTS OF PART C
The digital files are written on the enclosed 1.44 megabyte high density diskette. The disk contains the following:
1. README.TXT - an ASCII file which is a digital copy of this summary.
2. DR0021.TXT - an ASCII file which is a digital copy of this publication.
3. DR0021.WPD - a digital copy of this publication, in Word 97/2000 format.
4. DR0021.E00 - the GIS database of permitted surface NPDES in ARC/INFO export
format |
