OFR 97-492: Bath Quadrangle NURE HSSR Study
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[See History of NURE HSSR Program for a summary of the entire program.]
Subcontractors for the Savannah River Laboratory (SRL) collected at least 2,924 stream-sediment, 2,039 surface-water, and 1,938 ground-water samples from the southern half of Maine as part of the NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program. Two different sampling protocols were used in Maine. Using the SRL Eastern protocol (SRL-E), 1,218 stream-sediment, 1,218 surface-water, and 636 ground-water samples were collected from Androscoggin, Cumberland, Franklin, Kennebec, Oxford, Somerset Counties in October and November of 1977. This area includes included portions of the Bangor, Bath, Lewiston, Millinocket, Portland, and Sherbrooke 1:250,000-scale quadrangles. Another 1,706 stream-sediment, 821 surface-water, and 1302 ground-water samples were collected by subcontractors using SRL Western protocols (SRL-W) between May and August of 1980 within the Bangor, Bath, and Eastport 1:250,000-scale quadrangles. These samples were sent to SRL for determinations of uranium and additional elements (16 in sediments and 9 in waters) by Neutron Activation Analysis. SRL was able to analyze 1,230 sediments and 3,977 waters from Maine. The analytical and site location data for all Maine samples were released in the New England Data Report [GJBX-107(82)]. Within the Bath quadrangle: 8 stream-sediment, 8 surface-water, and 5 ground-water samples were collected by the SRL-E protocol; and 115 stream-sediment, 60 surface-water, and 106 ground-water samples were collected by the SRL-W protocol. SRL was able to analyze 8 sediment and 179 water samples from the Bath quadrangle.
SRL sent the 1,218 SRL-E sediment samples from Maine to an unnamed contract laboratory for "Supplemental Analyses." Supplemental analytical determinations for up to 23 elements were reported for 1,214 of these samples in the New England Data Report [GJBX-107(82)]. The digital data file accompanying this report includes Supplemental Analyses for 8 sediment samples from within the Bath quadrangle.
SRL also sent 1,643 SRL-W water samples from Maine to the Oak Ridge Gaseous Diffusion Plant (ORGDP) for Supplemental Analysis of 31 additional elements. Data for these additional analyses were reported in the New England Data Report [GJBX-107(82)]. The digital data file accompanying this report includes 92 water samples from within the Bath quadrangle.
SRL: Bath Quadrangle
SRL did not release a separate report for the Bath quadrangle.
ORGDP: Bangor and Bath Quadrangles
460 SRL-W water samples from the Bath and Bangor quadrangles were sent to ORGDP for Supplemental Analyses. The results were released on microfiche by ORGDP in the GJBX-174(82) Bath and Bangor Quadrangles report. The digital data file accompanying this report includes results for 67 water samples from within the Bath quadrangle. The site coding information for this data set was summarized in the GJBX-164(82) report.
Data for gold analyses of sediments by SRL neutron activation were released in the GJBX-135(82) summary report. The introduction of that report states:
"This report contains previously unreported neutron-activation analyses of gold in sediment samples determined at SRL. These data were not included in the standard SRL NURE data reports because the gold spectrum was not measured in the original analytical procedure and the report format was designed without the gold analyses being included. Gold analyses became available as the analytical procedure was refined, but the report format was not modified to incorporate these data."
Only those sediment samples that had detectable concentrations of gold by neutron activation analysis were given in the GJBX-135(82) report. Sediment samples with concentrations below detection limits were not reported and can only be ascertained by identifying which samples were actually analyzed by neutron activation at SRL.
Because of the various laboratories and analytical methods used, some SRL samples may have been analyzed once, twice, or not at all. The following table summarizes the analysis of Bath quadrangle samples.
|Only Supplemental Lab||0||0|
|Both SRL and ORGDP (2 records each)||0||159|
|Both SRL and Supplemental Labs||8||0|
|Total Data Records||123||338|
The following is a list of sample types collected and reported for NURE studies in the Bath quadrangle.
|Sediment Sample Type||Number of Samples||Water Sample Type||Number of Samples|
|Total Sediments||123||Total Waters||179|
These Bath quadrangle samples were analyzed by one or more of the following methods:
The Bath quadrangle sediment data includes records from the SRL New England GJBX-107(82) Data report. Supplemental analysis records in the SRL New England GJBX-107(82) Data report were combined with the corresponding SRL analysis records found within the same report. Whenever records were combined, fields containing data in both records were compared and any differences noted in the REFORMAT field. The end result for each sediment sample is a single combined record which includes all of the data found in each of the digital data files. The following problems were found and addressed during the comparison and reformatting stages for the Bath Quadrangle sediment data:
The Bath quadrangle water data consist of ground-water and surface-water records from the SRL New England GJBX-107(82) Data Report and the ORGDP Bath and Bangor Quadrangles GJBX-174(82) report. The SRL analyses and ORGDP supplemental analyses could NOT be combined because of overlapping determinations for 5 elements. Each water sample may therefore have up to 2 separate records - one for the SRL analysis and one for the ORGDP supplemental analysis. The following problems were found and addressed during the comparison and reformatting stages for the Bath quadrangle water data:
The NURE HSSR data are now available online in two databases: The sediment database (also includes data for soils and some rocks) at http://tin.er.usgs.gov/nure/sediment/ and the water database at http://tin.er.usgs.gov/nure/water/. From these two web sites, NURE HSSR data can be selected, examined, summarized, and downloaded by political boundaries (State and County), by quadrangle (1:250,000-scale, 1:100,000-scale, and 1:63,360-scale for Alaska or 1:24,000-scale for the Lower 48 States), and by hydrologic unit (drainage region, subregion, river basin, or sub-basin). Selected data can be downloaded as a dBase file, a shapefile, an HTML table, or ASCII text (tab- or comma-delimited).
Bath Quadrangle Sediment Data - 123 records
Bath Quadrangle Water Data - 338 records
In the eastern United States, SRL collected samples primarily by county. Often, not all counties within a quadrangle were completely sampled. Although the Bath quadrangle was completely sampled, the laboratory and analytical methods used may vary by county such that adjacent counties often have very different analytical coverages.
Although SRL collected 123 stream-sediment samples in the Eastport quadrangle, only 8 from Franklin County were analyzed.
Back to Maine NURE data
Frequently Asked Questions Concerning NURE HSSR Data
Home Page: USGS National Geochemical Database - NURE HSSR data
Page written by Andrew W. Holt and Steven M. Smith.
Contact: Steven M. Smith (firstname.lastname@example.org)
Version 1.30: September 11, 2001
Version 1.41: February 23, 2006
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