This complex investigation required the use of high-resolution sidescan sonar and remotely operated underwater vehicles to locate sea disposed munitions in water as deep as 1,500 feet. The SOEST's Hawaii Undersea Research Laboratory's (HURL) two three-man PISCES research submersibles were deployed to validate the results of sonar data and take water and sediment samples in areas where military munitions were found.
"We know from archived records thousands of military munitions were sea disposed at HI-05. There were also some indications that as many as 16,000 M47 100-pound bombs containing approximately 73 pounds each of the chemical agent mustard were disposed in the area," said Dr. Margo Edwards. "The systematic approach that we developed in collaboration with personnel from the U.S. Army and private industry (Environet, Inc.) allowed us to identify more than 2,000 munitions on the seafloor in the study area. With assistance from the HURL, samples collected within a few feet of several munitions provided the study team the ability to assess the potential impact of sea disposed munitions on human health and the ocean environment, as well as to assess the impact of the ocean environment on sea disposed munitions."
Sediment, water and biological samples were analyzed at the University of Hawaii and independent laboratories on the mainland for munitions constituents, including explosive compounds like TNT, chemical agents and their breakdown products, and metals.
The HI-05 project report has six major conclusions, which may be summarized as:
Most munitions in the HI-05 Study Area were disposed of by ships that were underway as munitions were cast overboard.The integrity of munitions in the area spans a broad spectrum, with even the best-preserved munitions casings deteriorating at a yet-to-be determined rate. Skirts and pedestals observed at the base of munitions may be the result of rusting, possibly in combination with leakage of munitions constituents.
The analytical methods used to detect munitions constituents during the program were effective. With the exception of one unconfirmed detection of mustard, neither chemical agents nor explosives were detected in any samples.Analysis of sediment samples collected around several munitions showed relatively little influence from human activities or man-made objects. This is significant given that the samples were taken within six feet of the munitions.
The observations and data collected do not indicate any adverse impacts on ecological health in the HI-05 Study Area.
The risk to human health from the consumption of fish and shrimp collected near the HI-05 Study Area were within Environmental Protection Agency acceptable risk levels.
Mr. Tad Davis, Deputy Assistant Secretary of the Army for Environment, Safety and Occupational Health stated, "University of Hawaii at Manoa's School of Ocean Earth Science and Technology (SOEST) and the quality team it assembled exceeded our expectations performing an extremely complex study with scientific rigor. By providing the Army with demonstrated, proven procedures for characterizing and assessing a munitions disposal site, SOEST has made a significant contribution to the Department of Defense's understanding of the potential effects of historic sea disposal sites on the ocean environment and those that use it."
The University of Hawaii undertook this project in partnership with Department of Defense's National Defense Center for Energy and the Environment. The National Oceanic and Atmospheric Administration and Environet, a local environmental engineering firm, consulted with the University of Hawaii on the project. The U.S. Army's Edgewood Chemical Biological Center provided chemical safety and analytical support for the project. The final report is available on the project website (www.hummaproject.com).
Contacts: University of Hawaii at Manoa: Margo Edwards (808) 956-5232
Office of the Assistant Secretary of Army for Environment, Safety and Occupational Health: Anne Johnson (703) 614-8464 or Dave Foster (703) 697-5344
Tara Hicks Johnson | EurekAlert!
Dry landscapes can increase disease transmission
20.06.2018 | Forschungsverbund Berlin e.V.
100 % Organic Farming in Bhutan – a Realistic Target?
15.06.2018 | Humboldt-Universität zu Berlin
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
21.06.2018 | Life Sciences
21.06.2018 | Earth Sciences
21.06.2018 | Life Sciences