Section I5 

 PHILADELPHIA, PEMSILVAMIA — PHILADELPHIA NAVAL SHIPIAKD 



AI5.OI Location of the Teat Sta,tlon and Test Board 



Two test boards of the panel type were operated at different 

 locations at the PhiladelTohia Naval Shipyard from July 17, 19^^ until 

 March I7, 19^7^ vhen their discontinuance was requested because they 

 showed almost no trace of marine life. The first of these test 

 hoards, which was designated by the symbol USEPP-l, was installed 25O 

 ft east of Point "G" along the Schuylkill Eiver Quaywall. The second 

 board, which was designated by the symbol 'USHPP-2, was installed at the 

 east side of Pier No. 6 in the Delaware River, 11 ft inshore from the 

 outboard end {9^h ft from the Quaywall). Both of these test boards 

 were in the vicinity of untreated wood piling. 



AI3.O2 Hydrographic Data 



1. Test Board No. 1 . This test board was submerged in water 

 8.9 ft deep. The tidal range was 5-6 ft practically every month of the 

 test, and this figure was reported to have been the mean range for the 

 past 50 years. The cuirent at ebb tide (to west) during the period of the 

 test was generally negligible and never exceeded 0.2 mile per hour; that 

 at flood tide (to east) also was negligible and never exceeded O.38 



mile per hour. The top of the test board was exposed at low water 

 approximately two hours daily, as the depth of the water was only 8.9 

 ft at mean low tide. The temperature and salinity of the water recorded 

 at monthly intervals during the period covered by the test are presented 

 in the- following tables. No information was given concerning pollution, 

 but it is known from personal experience to be considerable, especially 

 with respect to silt. The pE range of the water at this location 

 ranged from 5-2 to 1.3- 



2. Test Board No. 2 . This test board weis submerged in water 

 28.7 ft deep at mean low water. The tidal range was roughly 5*6 ft 



at every monthly reading during the test, and this figure wa^ reported 

 to have been the mean range for the past 50 years. The current at ebb 

 tide (to west) was slight, varying from O.k to l."0 mile an iiour; that at 

 flood tide (to east) also was slight, varying from O.75 to 2.25 miles 

 per hour. The tenrperature and salinity of the water recorded at 

 monthly Intervals during the period covered by the test are presented 

 in the following tables. There was probably also considerable pollution 

 of the water at this location. The pH reaction ranged -from U.6 to 7.5. 



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