Wood 1.9 an 

 Plexiglass 0,6 cm 



Fig. 2. Frame and rack assembly used for holding sixmonlh, six-replicate exposure panels at sites in the 

 vicinity of the Millstone Nuclear Power Station. 



Each exposure panel was a knot-free pine board 

 (25.4 X 8.9 X 1.9 cm) with one face covered by 

 plexiglass. Only the uncovered wood side of each 

 panel was processed. Two sets of six replicated 

 panels were bolted to a stainless steel rack attached 

 to a stainless steel frame at each site (Fig. 2). The 

 rack and frame assemblies deployed at WP, FI, 

 BP, and GN were suspended from docks by ropes 

 in waters not exceeding 2 m in depth; the lower 

 edge of the panels was maintained 0.2 m off the 

 bottom. At EF, two rack and frame assemblies 

 were used; the first (ES) was 1 m below the sur- 

 face, and the second (EB) about 1 m off the 



bottom at high tide, at a depth of 10 m. The 

 panels at EB were moved in May 1987 to the 

 cantilever dock leading to the Floating Lab, a 

 location used for exposure panels prior to 1979. 

 At this new location, the EB panels are maintained 

 in shallow water 0.2 m off the bottom, as at the 

 other sites. 



The panels were placed at each site in February, 

 May, August and November and collected six 

 months later in August, November, February and 

 May, respectively. This provided four exposure 

 periods, each overlapping the next by three 



Exposure Panel Program 



229 



