DATA CENTER

• Real-time data ()
  • Streamflow ()
  • Ground water ()
  • Water quality ()
  • Precipitation ()

• Historical data
  • Streamflow ()
  • Ground water ()
  • Water quality ()
  • Annual Data Reports:
     text () | map ()

• WaterWatch ()
  • Floods/High flows ()
  • DroughtWatch ()
  • Ground water ()

• Other data Links ()

INFORMATION CENTER

• Projects and Research Interests

• NAWQA - Volatile Organic Compound Synthesis

• NAWQA - Source Water-Quality Assessment

• National Weather Service

• Current South Dakota
  Radar Images

  • Rapid City Radar

  • Aberdeen Radar

  • Sioux Falls Radar

• Related Links

• Streamail System

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

Plan for Assessment of the Occurrence, Status,
and Distribution of Volatile Organic Compounds
in Aquifers of the United States

Table of Contents

Purpose and Scope
Acknowledgments

Data Selection
Inventory of local, State, and Federal Monitoring Programs
Data Needs
Criteria for Selection of Wells and Volatile Organic Compound Data
General Selection Criteria
Well-Network Design
Well Construction
Well Type
Selection of Volatile Organic Compound Data
Selection of a Volatile Organic Compound Analysis from Several Available for a Well
Censoring Volatile Organic Compound Data Using Quality-Control Data
Instrument and Method Detection Limits and Reporting Levels
Submittal of Data to the Volatile Organic Compound Occurrence Data Base
Analysis of Data

Instructions for filling out data-inventory Forms A and B

Form A. Record of first screen of possible monitoring programs for volatile organic compounds (VOCs) in ground water for ____ Study Unit

Form B. Summary of monitoring-program information for volatile organic compounds (VOCs) in ground water for ____ Study Unit

ILLUSTRATIONS
1. Map showing Study Units of the National Water-Quality Assessment Program

TABLES
1. Volatile organic compound target analytes in the National Water-Quality Assessment Program

2. Timeline for data collection, compilation, and reporting of results for assessment of occurrence, status, and distribution of volatile organic compounds in ground water

3. Data requested for submittal to the national volatile organic compound (VOC) occurrence data base for use in assessment of occurrence, status, and distribution of VOCs in ground water

4. Details of data requested for submittal to the national volatile organic compound (VOC) occurrence data base for use in assessment of occurrence, status, and distribution of VOCs in ground water

5. Criteria for selection of volatile organic compound (VOC) data for assessment of occurrence, status, and distribution of VOCs in ground water

6. Selected volatile organic compounds (VOCs) measured by indicated U.S. Geological Survey National Water-Quality Laboratory schedules and U.S. Environmental Protection Agency methods

7. Examples of monitoring-program or well-network characteristics, requested data compilation, and anticipated analysis of the data

8. Suggested priority for well selection for assessment of occurrence, status, and distribution of volatile organic compounds (VOCs) to minimize bias attributable to well type

9. Example of a relational data-base file (called netsite.rdb) that identifies each well, for which volatile organic compound (VOC) analyte-concentration data are submitted, in relation to the monitoring program/network from the VOC data-inventory tables

10. Example of a relational data-base file (called netdes.rdb) that describes general information about each monitoring program in the volatile organic compound (VOC) data-inventory tables for which VOC analyte-concentration data are submitted

11. Example of a relational data-base file (called aqsite.rdb) that identifies each well, for which volatile organic compound (VOC) analyte-concentration data are submitted, in relation to the aquifer in which the monitoring well is screened

12. Example of a relational data-base file (called aqdes.rdb) that describes information about each aquifer/hydrogeologic unit for which volatile organic compound (VOC) analyte-concentration data are submitted

CONVERSION FACTORS

			-------------------------------------------------------------------
			Multiply                          By         To obtain               
			-------------------------------------------------------------------
			Length                                                               
			foot (ft)                           0.3048   meter                   
			mile (mi)                           1.609    kilometer               
			Area                                                                 
			square mile (mi2)                   2.590    square kilometer        
			Hydraulic Conductivity                                               
			inch per year (in/yr)               25.4     millimeter per year     
			foot per day (ft/d)                 0.3048   meter per day           
			Flow                                                                 
			million gallons per day (Mgal/d)    0.04381  cubic meter per second  
			Transmissivity                                                       
			foot squared per day (ft2/d)        0.09290  meter squared per day   
			-------------------------------------------------------------------
			

			CAS     Chemical Abstract Services

			CERCLA  Comprehensive Environmental Response, Compensation, and Liability Act

			DD      National Water-Quality Assessment Program Data Dictionary

			GIS     Geographic Information System

			GWSI    U.S. Geological Survey Ground-Water Site Inventory

			IUPAC   International Union of Pure and Applied Chemistry

			LSD     Land-surface datum

			NAWQA   National Water-Quality Assessment Program

			NWIS    U.S. Geological Survey National Water Information System

			QWDATA  U.S. Geological Survey Water-Quality Data Base

			RCRA    Resource Conservation and Recovery Act

			USEPA   U.S. Environmental Protection Agency

			USGS    U.S. Geological Survey

			VOC     Volatile organic compound