Approved for public release; distribution unlimited. SUPPLEMENTARY NOTES 19. KEY WORDS (Continue and identity by bio Protective coatings, heat transfer, thermal properties, deterioration, heat exchangers, cost-effectiveness. 20. ABSTRACT (Continue on reverse side II necessary and identity by block number;Twelve finned tube heat exchangersfour pieces of three different materials or material combinationswere operated in a marine environment (1) uncoated, (2) coated with an electrostatically applied polyester enamel, (3) coated with a specification alkyd system, or (4) coated with a zinc inorganic silicate material. Temperature drops across each exchanger were monitored for 24 months and heat transfer capacities were calculated for selected periods. Copper tube/ (continued)

A combined field and modeling study addressing the dilution and spreading of produced water originating polycyclic aromatic hydrocarbons (PAH) has been carried out in the Tampen region, located in the Norwegian sector of the Northern North Sea. Sampling sites were identified in the region and located in positions near production platforms and in open sea. The station network was designed to cover areas in open sea. The station network was designed to cover areas in open sea. The station network was designed to cover areas expected to have elevated levels of production platforms and in open sea. The station network was designed to cover areas expected to have elevated levels of produced water originating PAH as well as areas not influenced by these discharges, based on dilution modeling of produced water discharge data for the Norwegian and British sectors. Five different sampling techniques were applied in this study. These were deployment of blue mussels and semi-permeable membrane devices (SPMDs) along with direct water sampling for solvent and solid phase extraction and in situ large volume water sampling. Using these results obtained with these techniques, the water concentrations of two selected PAH were compared to regional concentration fields from dilution modeling of produced water discharges from all platforms in the area (Norwegian and British sectors). The results showed that increased levels of PAH in the water phase could be found as far away as 10 km form the nearest discharge source. The agreement between the observed PAH levels and the corresponding levels suggested by the model were very good for the two components included in the present study. As could be expected, the model failed to detect local effects close to the discharge point, when the model was operating on a regional scale.

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The Laboratory is exposing wood panels impregnated with various materials th determine their resistance to attack by marine borers. This report lists the results of harbor tests of treated panels removed from exposure between 1 August 1959 and 15 August 1960. It also lists all treatedpanels which haveibeen exposed for one year or more and which have shown no attack or very slight amounts of attack. Treatments which have been exposed for less than one year are not reported unless they have failed and have been removed from test.When impregnated into wood test panels, creosote, coal tar, 70-30 creosotecoal tar solution, tributyltin coconut fatty acid salt, and tributyltin oxide, in general, give protection against Martesia and teredine (Teredo) attack but not against Limnoria. Inorganic copper and mercury compounds, phenylmercuric oleate, dibenzofuran, fluorene, and toxaphene protect against Limnoria attack only. Resistance to Limnoria attack, without adversely affecting resistance to Martesia and Teredo, is increased by the addition to creosote of aluminum, copper, or manganese oxinates, and dieldrin, phenylmercuric chloride, or phenylmercuric oleate; by the addition to coal tar of copper naphthenate or phenyl-mercuric oleate; and by the addition to a 70-30 solution of creosote-coal tar of copper naphthenate, dieldrin, endrin, phenylmercuric chloride, or phenylmercuric oleate. Combinations of copper compounds or complexes plus oxine or polyvinylmethyl ether-maleic anhydride, and dieldrin or endrin plus malachite green oxalate are resistant to Limnoria and teredine borers but not to Martesia.Copper naph thenoee plus linseed oil is resisting all types of borer attack both at Port Hueneme and Pearl Harbor. Nickel sulfate plus sodium monohydrogen arsenate, and-tributyltin oxs.,$e plus ammonium'sulfide show promise but have only been exposed for one year at Pcrt Hueneme. The tropical woods afambeau, antidesma pulvinatum, and greenheart show good resistance to borer attack. Greenheart panels extracted with various solvents, except those which had been extracted with boiling sea water, also are ccntinuing to show borer resistance.These results together with results obtained from current and future laboratory toxicity tests will Le used in developing additional wood treatments. Panel testing will be continued to screen these treatments under harbor exposure conditions. Emphasis will be placed on the addition to creosote and creosote-coal tar solutions of materials which are toxic to Umnoria. INTRODUCTIONThe destructive action of marine boring organisms on structures submerged in sea water presents a major maintenance problem to Navy shore installations. The replacement of wood piling destroyed by these organisms is a costly operation, and, in addition, moy remove the pier from operation during the reconstruction period.Under Project Y-R005-07-007, the Chief, Bureau of Yards and Docks, requested the Laboratory to investigate methods and materials for reducing or preventing borer attack on wooden marine structures ...

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