ENVVEST Ambient Monitoring Report Page

Results for trace metals (As, Al, Ag, Cd, Cr, Cu, Hg, Ni, Pb, and Zn), using analytical procedures appropriate for seawater, and conventional parameters (salinity, dissolved and total organic carbon, total suspended solids, NO2+NO3, NH4, TKN, and P)

Strivens J, Hayman N, Colvin M, Rosen G, Frew J, Richardson T. 2020. ENVVEST Ambient Monitoring Program: In-Progress Summary 2009‒2019. Sequim, WA: prepared for the Puget Sound Naval Shipyard and Intermediate Maintenance Facility under Project ENVVEST by the PNNL Marine Sciences Laboratory Report No.: PNNL-30285. PNNL_Strivens_2020_ENVVEST_AMB_Tox_2009-2019Final_noDPs.pdf (6.5 mb)

This report is a periodic update and supersedes: Strivens et al. 2018 (PNNL-28116). Primary updates in this summary consist of:

1) The addition of chemistry from five AMB Events (AMB25–AMB29) conducted from 2018–2019,

2) Incorporation of long-term whole effluent toxicity and receiving water toxicological evaluations,

3) A review of the Sinclair/Dyes Inlet’s water-effects-ratio toward protective effluent thresholds, and

4) Demonstration of passive sampling using Diffusive Gradient in Thin film (DGT) devices to determine DGT-labile marine Toxics Substances Criteria and fractionation in setting NPDES effluent limits that are protective of surface waters and the mass balance of the inlets.

Strivens JE, Brandenberger JM, Johnston RK. 2019 Feb 28. Data trend shifts induced by method of concentration for trace metals in seawater: Automated online preconcentration vs. borohydride reductive coprecipitation of nearshore seawater samples for analysis of Ni, Cu, Zn, Cd, and Pb via ICP-MS: Borohydride vs. Online. Limnology and Oceanography: Methods. doi:10.1002/lom3.10311. [accessed 2019 Apr 3]. http://doi.wiley.com/10.1002/lom3.10311

lom_Strivens_2019_Cu_method_comparison_3.pdf.

Abstract

This research compares performance, reproducibility, and detection limits of ambient seawater analysis for trace metals using both borohydride reductive coprecipitation and an automated chelation column (seaFAST™ 2) preconcentration for matrix interferent elimination on total and dissolved grab samples in nearshore to marine waters, over a broad concentration range, prior to inductively coupled plasma mass spectrometry (ICP-MS) injection. A move to an online preconcentration method both minimizes sample preparation, and eliminates correction errors when accounting for trace impurities in precipitated samples, induced via reagents. The reproducability of the online preconcentration method described, coupled with low blanks and method detection limits (MDLs), demonstrates the effectiveness of the automated procedure using ethylenediaminetriacetic and iminodiacetate acid chelation exchange resin and multianalyte determination by ICP-MS for total and dissolved Ni, Cu, Zn, Cd, and Pb in marine water samples. Average CASS-5 recoveries using the online preconcentration method (n = 9) were 109% ± 7%, 104% ± 5%, 103% ± 7%, 101% ± 3%, and 86% ± 8%, respectively. The MDLs obtained from the automated method for Ni, Cu, Zn, Cd, and Pb were 3.3, 1.8, 13.5, 4, and 10 times lower, respectively, than for the Borohydride method. There were statistically significant differences between the methods for CASS-5 recoveries of Ni, Cu, Zn (p < 0.0001), and Pb (p = 0.0024). Comparison of methods gave high concordance (r_C ≥ 0.90) between methods for total and dissolved Ni, Cu, Zn, and Pb, and total Cd.

Strivens, J.E., Johnston R.K., Schlafer N., and Brandenberger J.M. 2018. ENVVEST Ambient Monitoring Program: In-Progress Summary 2009‒2017. PNNL-28116, prepared for the Puget Sound Naval Shipyard and Intermediate Maintenance Facility under Project ENVVEST by the Pacific Northwest National Laboratory, Marine Sciences Laboratory, Sequim, Washington. Final Report, Sept. 2018, 53pp + appendices. 20181011_ENVVESTAmbientMonitoringProgram2009-2017Final.pdf (111.5 mb)