Accession Number:



Water Quality Monitoring of Biofouling Removal from the ex-USS INDEPENDENCE (CV 62)

Descriptive Note:

Technical Report,06 Jan 2017,07 Mar 2017

Corporate Author:

Space and Naval Warfare Systems Center Pacific San Diego United States

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This report contains details of Biofouling removal from the ex-INDEPENDENCE conducted on January 6 to 27, 2017, at Mooring G at Puget Sound Naval Shipyard PSNS. This study was conducted to monitor and evaluate key water quality parameters at six sites located near the ship area of influence and four reference sites within western Sinclair Inlet. Details include results of four sampling events that were conducted, which included before removal Event 1, Baseline, November 9 to 10, 2016, during removal Event 2, During-removal, January 10, 2017, at the end of removal Event 3, Week-post-removal, January 31, 2017, and 40 days after removal was completed Event 4, Month-post-removal, March 7, 2017. Each sampling event consisted of collecting discrete water samples from the surface, mid-depth, and near bottom strata of the water column.As part of the research, water samples were analyzed for dissolved and total Cu and Zn, nutrients, DOC, and BOD. In addition, in-situ sensors were utilized during the study to provide continuous monitoring of temperature, salinity, pH, DO, and turbidity within the water column at each sampling site. In summary, there was no evidence of any parameter exceeding regulatory thresholds and no evidence of a persistent water quality impacts from the ex-INDEPENDENCE biofouling removal operation, as water quality indicators returned to ambient conditions within 40 days after biofouling removal was completed.

Subject Categories:

  • Water Pollution and Control
  • Manufacturing and Industrial Engineering and Control of Production Systems

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