21d7c4ca-09cf-634b-e063-0937940a9eee English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-29 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608272 Groundwater geochemical data from two sites in Cambodia, southeast of Phnom Penh, 2019 - 2020 2024-09-10 creation http://data.bgs.ac.uk/id/dataHolding/13608272 These are groundwater geochemical data taken from two sites in the Kien Svay district of northern Kandal Province, Cambodia, southeast of Phnom Penh. These sites are referred to as “clay-dominated” and “sand-dominated” in reference to the known lithology and are known for high arsenic concentrations (Richards et al., 2017). Each site contained four 18 m boreholes installed in January 2019 using manual drilling described in Richards et al (2015), spaced evenly about ~1.5 m apart. The boreholes that were located at the clay-dominated site are referred to NB01, NB02, NB03 and NB04. The boreholes that were located at the sand-dominated site are referred to as NB05, NB06, NB07 and NB08. Two sampling campaigns were carried out: 6th-12th May 2019 (pre-monsoon season), and 27th-31st January 2020 (post-monsoon season). References: Richards, L. A., Magnone, D., Sovann, C., Kong, C., Uhlemann, S., Kuras, O., van Dongen, B. E., Ballentine, C. J., Polya, D. A. High Resolution Profile of Inorganic Aqueous Geochemistry and Key Redox Zones in an Arsenic Bearing Aquifer in Cambodia. Science of The Total Environment 2017, 590–591, 540–553. Richards, L. A., Magnone, D., van Dongen, B. E., Ballentine, C. J., Polya, D. A. Use of Lithium Tracers to Quantify Drilling Fluid Contamination for Groundwater Monitoring in Southeast Asia. Applied Geochemistry 2015, 63, 190–202. Prof David Polya University of Manchester School of Earth and Environmental Sciences Williamson Building-G27 Manchester M13 9PL United Kingdom not available originator Prof Jonathan Lloyd University of Manchester School of Earth and Environmental Sciences Manchester M13 9PL not available originator Dr Naji Bassil University of Manchester School of Earth and Environmental Sciences Williamson Building Manchester M13 9PL not available originator Bart van Dongen University of Manchester not available originator Oliver Charles Moore Swedish University of Agricultural Sciences Department of Forest Mycology and Plant Pathology, Box 7026 Uppsala 750 07 Sweden not available originator Laura A Richards University of Manchester not available originator Chivuth Kong Royal University of Agriculture not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/21d7c4ca-09cf-634b-e063-0937940a9eee.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Arsenic Boreholes Geochemistry Groundwater Iron BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation 2019-05-06 2020-01-31 Microsoft Excel witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item186121 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/6bb55fd0-c4ef-4044-8acc-d6641c19e00c WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Bassil, N. M., Richards, L. A., Kong, C., Moore, O., van Dongen, B. E., Polya, D. A., Lloyd, J. R. (2024). Groundwater geochemical data from two sites in Cambodia, southeast of Phnom Penh, 2019 - 2020. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/6bb55fd0-c4ef-4044-8acc-d6641c19e00c information nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Groundwater sample collection began upon stabilization of the ORP (which was typically after about 120 L, or 6 - 7 borehole volumes, of water had been removed from the boreholes). Surface water samples were collected from wetland/pond near the clay-dominated site. In each sampling campaign, duplicate samples were taken from each borehole, by filtration through 0.45 µm glass microfiber syringe filters (Whatman/GE Healthcare, UK), stored in acid-washed and furnaced 100 mL glass serum bottles, sealed with rubber butyl stoppers secured with an aluminium crimp, kept stored at 4°C until analysis, within 4 weeks of collection. Subsamples were acidified to pH 2 using trace grade nitric acid (BDH Aristar, UK) for elemental analysis using inductively coupled plasma atomic emission spectrometry (Perkin-Elmer Optima 5300 dual view; iron) and/or inductively coupled plasma-mass spectrometry (Agilent 7500cx; arsenic). Subsamples were used to measure dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) using the high-temperature catalytic oxidation method as described previously (Nixon et al., 2018). All the geochemical measurements were done at the Manchester Analytical Geochemistry Unit at The University of Manchester. References: Nixon, S. L.; van Dongen, B. E.; Boothman, C.; Small, J. S.; Lloyd, J. R. Additives in Plasticised Polyvinyl Chloride Fuel Microbial Nitrate Reduction at High pH: Implications for Nuclear Waste Disposal. Frontiers in Environmental Science 2018, 6. https://doi.org/10.3389/fenvs.2018.00097