Transect I was 305 meters north of transect II, and transect III was 

 305 meters south of transect II. 



On the sound beach, transect IV was 118 meters south of bench mark 

 64. This site was selected because it included a small marsh. Transect 

 V was 34 meters north of bench mark 64, and 152 meters north of transect 

 IV. This site was selected because a shallow east-to-west depression 

 caused the transect to be in deeper water than the surrounding area. 

 Transect VI was 200 meters north of transect V in a barren sand area 

 with little slope which was typical of the sound beach. 



2. Sampling Device. 



Preliminary tests conducted with two grab sampling devices which 

 were considered unsuitable for the project are discussed in Appendix A. 

 The device used in the project (Fig. 3) was a corer constructed of a 

 6-milliraeter (1/4 inch) circular steelplate with a 1-centimeter hole in 

 the center welded to a 15-centimeter section of 8 . 55-centimeter-diameter 

 (3-3/8 inches) steel electrical conduit. A 2.54-centimeter (1 inch) 

 pipe coupling was welded to the plate over the hole, and a 2.54-centi- 

 meter steel pipe was tightly screwed into the coupling. The leading 

 edge of the steel conduit was sharpened to aid penetration. A long 

 handle (about 50 centimeters) was used in the shallow areas, and a 

 short handle (about 15 centimeters) was used in the deep areas that 

 required diving. 



The corer was pushed into the substrate, then extracted with the 

 hole at the top of the handle covered. The core sample usually remained 

 in the corer until the sample was placed in a bag, but on the deep sites 

 the open end was covered to prevent the sample from washing out. 



The corer was easy to use, fast, and unaffected by the varying 

 particle sizes on the beach, and there were no moving parts to rust or 

 jam. It was relatively safe to use in the surf zone where sampling is 

 dangerous. The corer sampled a large area (57.7 square centimeters) 

 compared to commercially available corers . 



3. Sampling Plan . 



The sampling plan was changed to improve the efficiency of the 

 sampling and the quality of the data (App. B) . In the final plan on 

 the ocean beach, the zero point on each transect was the landward 

 margin of the swash zone. Thus, the sites were in the same relative 

 position with reference to the wave activity, but changed position 

 between sampling series with reference to a fixed point onshore. Sites 

 one to nine were respectively established seaward of the zero point at 

 3.3, 7.6, 10.6, 13.6, 15.2, 22.7, 30.4, 45.6, and 60.8 meters 

 (horizontal distance) (Fig . 4). IVlien possible, samples were collected 

 during low tide so the sites were relatively the same distance from MSL 

 over the sampling series. However, the main criterion in determining 

 sampling times was sea conditions. 



16 



