Metadata: Identification_Information: Citation: Citation_Information: Originator: Brooks, T.W. Originator: Kroeger, K.D. Originator: Bratton, J.F. Originator: Crusius, J. Originator: Szymczycha, B. Originator: Mann, A.G. Originator: Brosnahan, S.M. Originator: Casso, M. Originator: Erban, L. Publication_Date: 2017 Title: Coastal Groundwater Chemical Data from the North and South Shores of Long Island, New York Edition: 1.0 Geospatial_Data_Presentation_Form: comma-separated values file and xlsx file Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F78S4NT5 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Brooks, T.W., Kroeger, K.D., Bratton, J.F., Crusius, John, Szymczycha, Beata, Mann, A.G., Brosnahan, S.M., Casso, Michael, and Erban, Laura, 2017, Coastal groundwater chemical data from the north and south shores of Long Island, New York: U.S. Geological Survey data release, https://doi.org/10.5066/F78S4NT5. Online_Linkage: https://doi.org/10.5066/F78S4NT5 Online_Linkage: https://www.sciencebase.gov/catalog/item/5953a36de4b062508e3c7b5a Description: Abstract: Groundwater data were collected in the spring and fall of 2008 from three sites representing different geological settings and biogeochemical conditions within the surficial glacial aquifer of Long Island, NY. Investigations were designed to examine the extent to which average vadose zone thickness in contributing watersheds controlled biogeochemical conditions and processes, including dissolved oxygen concentration (DO), oxidation-reduction potential (Eh), dissolved organic carbon concentration (DOC), and microbial dinitrogen (N2) production. Greatest N2 production was observed at the south shore of Long Island, which is characterized by a thin vadose zone, low DO and Eh, and relatively high DOC. Limited N2 production occurred at the north shore of Long Island, which is characterized by a thick vadose zone, higher DO, higher Eh, and lower DOC. Our results show that vadose zone thickness exerts an important control on the extent of microbial N2 production in aquifers that lack a significant supply of sediment-bound reducing potential. We interpret heterotrophic denitrification to be the primary driver of N2 production in the present study, while acknowledging that anaerobic ammonium oxidation (anammox) likely plays an unquantified role as well. Purpose: This dataset was produced in order to examine the relationship between average vadose zone thickness and biogeochemical conditions and processes within the surficial glacial aquifer of Long Island, NY. Supplemental_Information: Data presented here are to support the following publication: Szymczycha, B., Kroeger, K.D., Crusius, J., Bratton, J.F., Depth of the vadose zone controls aquifer biogeochemical conditions and extent of anthropogenic nitrogen removal, Water Research (2017), doi: 10.1016/j.watres.2017.06.048. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080506 Ending_Date: 20081031 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.7162 East_Bounding_Coordinate: -73.0009 North_Bounding_Coordinate: 40.90648 South_Bounding_Coordinate: 40.72947 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5953a36de4b062508e3c7b5a Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: denitrification Theme_Keyword: excess air Theme_Keyword: recharge temperature Theme_Keyword: vadose zone thickness Theme_Keyword: membrane inlet mass spectrometry (MIMS) Theme_Keyword: groundwater discharge Theme_Keyword: nitrate Theme_Keyword: dissolved organic carbon Theme_Keyword: dissolved oxygen Theme_Keyword: climate change Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: groundwater Theme_Keyword: water chemistry Theme_Keyword: water pH Theme_Keyword: oxygen content (water) Theme_Keyword: hydrogeology Theme_Keyword: tritium analysis Theme_Keyword: salinity Place: Place_Keyword_Thesaurus: None Place_Keyword: Long Island, NY, United States Place_Keyword: Port Washington, NY, United States Place_Keyword: Northport, NY, United States Place_Keyword: Patchogue, NY, United States Place_Keyword: Long Island Sound Place_Keyword: Great South Bay Place_Keyword: Northport Harbor Place_Keyword: Manhasset Bay Access_Constraints: None. Use_Constraints: None. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: T.W. Brooks Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2359 Contact_Electronic_Mail_Address: wallybrooks@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/5953a36de4b062508e3c7b5a?name=Map_study_sites_LongIslandNY.jpg Browse_Graphic_File_Description: Thumbnail image of the sampling sites. Browse_Graphic_File_Type: JPEG Cross_Reference: Citation_Information: Originator: Szymczycha, B. Originator: Kroeger, K.D. Originator: Crusius, J. Originator: Bratton, J.F. Publication_Date: 2017 Title: Depth of the vadose zone controls aquifer biogeochemical conditions and extent of anthropogenic nitrogen removal. Series_Information: Series_Name: Water Research Issue_Identification: v. 123, p. 1-8 Publication_Information: Publication_Place: Amsterdam, Netherlands Publisher: Elsevier Online_Linkage: https://doi.org/10.1016/j.watres.2017.06.048 Cross_Reference: Citation_Information: Originator: Cross, V.A. Originator: Bratton, J.F. Originator: Kroeger, K.D. Originator: Crusius, J. Originator: Worley, C.R. Publication_Date: 2013 Title: Continuous resistivity profiling data from Great South Bay, Long Island, New York Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1040 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2011/1040/ Cross_Reference: Citation_Information: Originator: Cross, V.A. Originator: Bratton, J.F. Originator: Kroeger, K.D. Originator: Crusius, J. Originator: Worley, C.R. Publication_Date: 2012 Title: Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1041 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2011/1041/ Cross_Reference: Citation_Information: Originator: Zhao, S. Originator: Zhang, P. Originator: Crusius, J. Originator: Kroeger, K.D. Originator: Bratton, J.F. Publication_Date: 2011 Title: Use of pharmaceuticals and pesticides to constrain nutrient sources in coastal groundwater of northwestern Long Island, New York, USA Series_Information: Series_Name: Journal of Environmental Monitoring Issue_Identification: 13(5), 1337-1343 Publication_Information: Publication_Place: United Kingdom Publisher: Royal Society of Chemistry Data_Quality_Information: Logical_Consistency_Report: Field sampling, laboratory analyses, and subsequent handling and processing of data followed strict protocols and were consistent for each process step outlined below. In order to avoid the use of special characters, no subscripts are used in the metadata. N2 is actually N subscript 2 and represents dinitrogen. Completeness_Report: Data support an investigation of hydrogeological controls on biogeochemical processes occurring within the surficial glacial aquifer of Long Island, NY, prior to any mixing with saltwater. Thus, with the exception of groundwater samples for which age was measured, groundwater samples with salinity greater than 0.8 practical salinity units (PSU) are excluded from this dataset. Due to substantial investment of time for sample collection and cost of analysis, we had only a small number of age results and therefore utilized all available age data to estimate the range of ages at time of discharge. Salinity of groundwater samples for which age was determined ranged from 0.1 to 6.3 PSU. Cells of missing data indicate either that the sample was not collected due to sampling difficulties, the field parameter was not recorded, the sample was lost post-collection, or problems with measurement or analysis rendered the data quality inadequate to include in this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Location was measured with a handheld Garmin GPSMAP 76Cx using the WGS84 datum to an accuracy of approximately 3 meters. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Vertical position (depth of well screen below sediment surface) was measured by subtracting the exposed length of the AMS drive-point sampling device from the total length to an accuracy of a few centimeters. Lineage: Process_Step: Process_Description: Groundwater samples were collected with AMS drive-point samplers and peristaltic pumps (Charette and Allen, 2006) from within or near the intertidal zones of the three study areas, and at depths of 0.3 to 10.1 meters below the sediment surface. Contact details are listed below for this process step and are the same for all subsequent process steps. Charette, M. A., and Allen, M. C., 2006, Precision ground water sampling in coastal aquifers using a direct‐push, Shielded‐Screen Well‐Point System. Groundwater Monitoring & Remediation, v. 26 no. 23, p. 87-93. Process_Date: 2008 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: T.W. Brooks Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2359 Contact_Electronic_Mail_Address: wallybrooks@usgs.gov Process_Step: Process_Description: Salinity, pH, oxidation/ reduction potential (ORP), and dissolved oxygen (DO) were measured in the field with either a calibrated YSI 600XLM multi-parameter sonde with a flow through cell, or calibrated InSitu Troll 9500 multi-parameter sonde with flow through cell. ORP values were converted to Eh (mV) by adding 200 to the values. DO was calibrated daily, and the remaining parameters were calibrated biweekly, with additional periodic checks in calibration standards performed throughout the sampling campaign as needed. Calibration frequency, accuracy, and precision for the two sondes were the same, therefore it is of no concern when comparing their measurements. Process_Date: 2008 Process_Step: Process_Description: Samples for dissolved organic carbon (DOC) were filtered through Pall cartridge filters (0.45 micron pore size) into combusted glass vials with teflon-lined septa, and stored at 4 degrees C until analysis. Samples were analyzed at University of California Stable Isotope Facility on an O.I. Analytical 1030 TOC analyzer by persulfate digestion and nondispersive infrared detection. Average relative standard deviation of an intermediate standard was typically less than or equal to 5 percent. Process_Date: 200902 Process_Step: Process_Description: Samples for nitrate and ammonium were filtered through Pall cartridge filters (0.45 micron pore size) and frozen until analysis. Samples were analyzed at the Marine Biological Laboratory (MBL), Woods Hole, MA on a Lachat FIA-6000 autoanalyzer using standard colorimetric methods (Strickland and Parsons, 1972). Nitrate and nitrite were not quantified separately and their sum is referred to here as nitrate. Strickland, J. D., and Parsons, T. R., 1972, A practical handbook of seawater analysis. Process_Date: 2008 Process_Step: Process_Description: Samples for N2 and Ar analysis were collected in duplicate into 12 mL glass exetainers with screw-cap butyl rubber septa. Exetainers were filled from the bottom, overflowed with >5 void volumes, capped immediately without headspace, and stored underwater at 4 degrees C until analysis. Samples were analyzed at the Ecosystems Center at MBL by membrane inlet mass spectrometry (MIMS), for 28N2, 29N2, 30N2, and 40Ar, to a precision of <0.5 percent (Kana and others, 1994; Kana, 2004). Samples were typically analyzed within a month or two of collection. Total N2 was obtained by summing the masses 28, 29 and 30. Total Ar was calculated based on assumption that the measured isotope of mass 40 comprised 99.6% of total Ar. Four N2 and Ar data points were eliminated because low gas concentrations indicated that the samples had degassed during collection. In this data report, no further judgements were made regarding whether a more subtle level of degassing had occurred in the remaining samples. The Szymczycha and others, 2017 analysis involved further judgements of minimum gas concentrations based on estimated recharge temperatures, and thus represent a subset of the data contained in this data report. Kana, T. M., Darkangelo, C., Hunt, M. D., Oldham, J. B., Bennett, G. E., and Cornwell, J. C., 1994, Membrane inlet mass spectrometer for rapid high-precision determination of N2, O2, and Ar in environmental water samples: Analytical Chemistry, v. 66 no. 23, p. 4166-4170. Kana, T. M., 2004, Comment on “Comparison of isotope pairing and N 2: Ar methods for measuring sediment denitrification” by B.D. Eyre, S. Rysgaard, T. Dalsgaard, and P. Bondo Christensen. 2002. Estuaries 25: 1077–1087. Estuaries and Coasts, v. 27 no. 1, p. 173-176. Process_Date: 2008 Process_Step: Process_Description: Groundwater age, or time since recharge, was estimated based on mass spectrometric measurement of helium isotopes and tritium analysis of water samples. Sample analysis and age estimation were conducted by the Lamont-Doherty Earth Observatory Noble Gas Laboratory of Columbia University, Palisades, NY, by the 3He ingrowth method. Precisions for measurement of tritium, delta 3He, and the 4He and Ne concentrations are ±1 to 2%, ±0.15 to 0.2%, and ±0.2 to 0.3%, respectively, and reported age uncertainty for the samples analyzed ranged from 0.1 yr to 1.2 yr. Process_Date: 200906 Process_Step: Process_Description: One author had an incorrect middle initial, so this was fixed in the originator list and the suggested citation. The correct authorship is S.M. Brosnahan, not S.B. Brosnahan. Process_Date: 20180906 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200807 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 117 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Sediment surface Depth_Resolution: 0.01 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: coastal_groundwater_chemical_data_LongIslandNY_2008 Entity_Type_Definition: Coastal groundwater data from the north and south shores of Long Island, NY, collected during spring and fall of 2008. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Location Attribute_Definition: brief text describing sampling location Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set (text) Attribute: Attribute_Label: Sample ID Attribute_Definition: unique sample identifier assigned in the field Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set (text) Attribute: Attribute_Label: Sampling date Attribute_Definition: Date on which the groundwater sample was collected Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5/6/2008 Range_Domain_Maximum: 10/31/2008 Attribute_Units_of_Measure: m/dd/yyyy Attribute: Attribute_Label: Latitude, decimal degrees N Attribute_Definition: latitude of the sample location, decimal degrees north Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 40.72947 Range_Domain_Maximum: 40.90648 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude, decimal degrees W Attribute_Definition: longitude of the sample location, decimal degrees west Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -73.71617 Range_Domain_Maximum: -73.00093 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Depth (m) Attribute_Definition: depth of the well screen below the sediment surface. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.3 Range_Domain_Maximum: 10.1 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Salinity (PSU) Attribute_Definition: salinity of the water sample Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 6.3 Attribute_Units_of_Measure: PSU Attribute: Attribute_Label: pH Attribute_Definition: negative logarithm of hydronium ion activity, -log[H+], in the water sample. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.7 Range_Domain_Maximum: 7.4 Attribute_Units_of_Measure: unitless Attribute: Attribute_Label: Eh (mV) Attribute_Definition: oxidation/ reduction potential of the water sample, converted to units of Eh. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -117 Range_Domain_Maximum: 417 Attribute_Units_of_Measure: mV Attribute: Attribute_Label: DO (uM) Attribute_Definition: dissolved oxygen concentration. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4 Range_Domain_Maximum: 364 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: DOC (uM) Attribute_Definition: dissolved organic carbon concentration. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.7 Range_Domain_Maximum: 1285.7 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: Nitrate + Nitrite (uM) Attribute_Definition: concentration of nitrate (NO3-) plus nitrite (NO2-). Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 434.5 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: Ammonium (uM) Attribute_Definition: ammonium ion (NH4+) concentration. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 919.8 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 28N2 A (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 28 grams, replicate 1 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 573 Range_Domain_Maximum: 975 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 29N2 A (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 29 grams, replicate 1 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4.2 Range_Domain_Maximum: 7.0 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 30N2 A (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 30 grams, replicate 1 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 0.1 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: N2TOT A (uM) Attribute_Definition: concentration of total dissolved dinitrogen gas (sum of concentrations of masses 28, 29, and 30), replicate 1 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 577 Range_Domain_Maximum: 982 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: Ar A (uM) Attribute_Definition: concentration of dissolved argon gas, replicate 1 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 13.9 Range_Domain_Maximum: 21.8 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 28N2 B (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 28 grams, replicate 2 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 553 Range_Domain_Maximum: 916 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 29N2 B (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 29 grams, replicate 2 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4.1 Range_Domain_Maximum: 6.6 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: 30N2 B (uM) Attribute_Definition: concentration of dissolved dinitrogen gas having a molar mass of 30 grams, replicate 2 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 0.1 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: N2TOT B (uM) Attribute_Definition: concentration of total dissolved dinitrogen gas (sum of concentrations of masses 28, 29, and 30), replicate 2 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 557 Range_Domain_Maximum: 923 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: Ar B (uM) Attribute_Definition: concentration of dissolved argon gas, replicate 2 of 2. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 13.9 Range_Domain_Maximum: 21.7 Attribute_Units_of_Measure: micromoles per liter (uM) Attribute: Attribute_Label: Age, uncorrected (y) Attribute_Definition: groundwater age, uncorrected for terrigenic helium. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -10.5 Range_Domain_Maximum: 12.3 Attribute_Units_of_Measure: years Attribute: Attribute_Label: 1sigma, uncorrected age (y) Attribute_Definition: standard deviation of uncorrected groundwater age. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.3 Range_Domain_Maximum: 1.2 Attribute_Units_of_Measure: years Attribute: Attribute_Label: Age, corrected for terrigenic He (y) Attribute_Definition: groundwater age, corrected for terrigenic helium. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -6.9 Range_Domain_Maximum: 15.0 Attribute_Units_of_Measure: years Attribute: Attribute_Label: 1sigma, corrected age (y) Attribute_Definition: standard deviation of corrected groundwater age. Cells for which data do not exist are intentionally left blank, specifics are outlined in the Completeness Report. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 0.6 Attribute_Units_of_Measure: years Overview_Description: Entity_and_Attribute_Overview: These data are also available in a CSV format. The first line of the CSV file is a header line and those labels are the same as defined in the attribute section for the XLSX file. Cells of missing data indicate either that the sample was not collected due to sampling difficulties, the field parameter was not recorded, the sample was lost post-collection, or problems with measurement or analysis rendered the data quality inadequate to include in this dataset. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains the following files: coastal_groundwater_chemical_data_LongIslandNY_2008.xlsx (data in an Excel spreadsheet), coastal_groundwater_chemical_data_LongIslandNY_2008.csv (same data in a comma-separated text file), map_study_sites_LongIslandNY.jpg (browse graphic), and FGDC CSDGM metadata in XML, text and HTML formats. Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: XLXS Format_Version_Number: Microsoft Excel version 2010 Format_Information_Content: The zip file contains the XLSX, CSV, browse graphic and associated metadata. Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5953a36de4b062508e3c7b5a Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5953a36de4b062508e3c7b5a Network_Resource_Name: https://doi.org/10.5066/F78S4NT5 Access_Instructions: The network resources offer the options of downloading all the files, or accessing the landing page of the data where individual files can be downloaded. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: Microsoft Excel version 2010 Format_Specification: Comma-Separated Values exported from Excel Format_Information_Content: The zip file contains the XLSX, CSV, browse graphic and associated metadata. Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5953a36de4b062508e3c7b5a Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5953a36de4b062508e3c7b5a Network_Resource_Name: https://doi.org/10.5066/F78S4NT5 Access_Instructions: The network resources offer the options of downloading all the files, or accessing the landing page of the data where individual files can be downloaded. Fees: None. Technical_Prerequisites: This data are available in XLSX and CSV formats. The user must have software capable of reading these data formats. Metadata_Reference_Information: Metadata_Date: 20200807 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: T.W. Brooks Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2359 Contact_Electronic_Mail_Address: wallybrooks@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998