1. Titles and Authors Stanton, J.S., and Qi, S.L., 2006, Ground-water quality of the northern High Plains aquifer, 1997, 2002B 04: U.S. Geological Survey Scientific Investigations Report 2006-5138, 59 p. 2. Overview The content of this report, published on CD-ROM, is a companion to SIR2006-5138, and includes the data base used for the report. The data are provided in MS Access format and in ASCII flat file format. 3. CD Contents and Organization Downloads Directory 00README.txt: CD contents listed in ASCII format. Data Directory Access Directory NHP_QW_Database.mdb: Contains the data base in MS Access 2000 format. access_read_me.pdf: a help file in Adobe PDF format describing the tables in the MS Access data base. access_read_me.txt: A help file in ASCII format describing the tables in the MS Access data base. ASCII Directory: ascii_read_me.pdf: A help file in Adobe PDF format describing the ASCII tables exported from the MSAccess data base. ascii_read_me.txt: A help file in ASCII format describing the tables in the ASCII tables exported from the MSAccess data base. Files in this directory are tab-delimited ASCII files. samples.txt: This table contains information about each sample and from which well network it was collected. It is linked to the QW_RESULTS table using the siteID, DATES, TIMES, and MEDIM fields. qw_results.txt: This is the primary and largest table in the data base. It contains each result or measurement made at a well site. It is linked to the SAMPLES table using the siteID, DATES, TIMES, and MEDIM fields, and it is linked to the PARAMETERS table using the Ppcode. PARAMETERS.txt: Information defining each result or measurement made at a well. The PARAMETERS table is linked to the QW_RESULTS table using the Ppcode. The lookup tables are: tblMediumCodes.txt: Meaning of the codes for the field MEDIM in the SAMPLES and QW_RESULTS tables. tblRemarkCodes.txt: Meaning of the value remark codes used in the QW_RESULTS table. tblSampleTypeCodes.txt: Meaning of the codes for the SampleType field used in the SAMPLES table. The result files for constituent groups are: NHPFieldMeasurements.txt: Table of field properties (pH, dissolved oxygen, specific conductance, etc.) for samples from all hydrogeologic units in the data base, including quality-control samples. NHPMajorIons.txt: Table of major ion results for samples from all hydrogeologic units in the data base, including quality-control samples. NHPColiphage.txt: Table of coliphage results for samples from the Eastern Nebraska and Sand Hills hydrogeologic units in the data base, including quality-control samples. NHPNutrients.txt: Table of nutrient results for samples from all hydrogeologic units in the data base, including quality-control samples. NHPPesticides.txt: Table of pesticide results for samples from all hydrogeologic units in the data base, including quality-control samples. NHPRadon.txt: Table of radon results for samples from all hydrogeologic units in the data base, including quality-control samples. NHPTraceElements.txt: Table of trace element results for samples from all hydrogeologic units in the data base, including quality-control samples. NHPTritium.txt: Table of tritium results for samples from all hydrogeologic units in the data base, including quality-control samples. NHP_DOC.txt: Table of dissolved organic carbon results for samples from all hydrogeologic units in the data base, including quality-control samples. NHP_VOCs.txt: Table of volatile organic compound results for samples from all hydrogeologic units in the data base, including quality-control samples. 4. Disclaimer This online version of the Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof nor any of their employees make any warranty, expressed or implied, or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represent that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Although all data and software on this publication have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials. 5. Software Installation No software is included.