Figure 30. Central Long Island Sound disposal site (SAIC 1995a)

Four LBC projects are the focus of the SAIC (1995a) report, and they

all were conducted in the CLIS disposal site. The four NED projects

(Stamford-New Haven, Mill-Quinnipiac River, Norwalk, and Cap Sites 1

and 2) are located within the boundaries of the CLIS disposal site, which

is an area of 2 nm2 located approximately 6.2-miles south-southeast of

New Haven, CT, in water depths between 56 and 82 ft (Figure 30). Base-

line data sets had previously been collected and were available for use in

the capping projects as described in SAIC (1995a). Two other recent cap-

ping projects not discussed in SAIC (1995a), Harbor Village-Branford

River (CS 90-1) and New Haven (CLIS-NHAV 93), have also been con-

ducted in CLIS.

Figure 30.

Central Long Island Sound disposal site (SAIC 1995a)

The Stamford-New Haven project was the first planned capping project

at a subaqueous site in United States coastal waters. This project involved

disposal of contaminated material from Stamford Harbor followed by cap-

ping with slightly less contaminated material from New Haven Harbor at

two sites within CLIS. The success of the 1979 Stamford-New Haven pro-

ject led to increased use of capping in New England under the DAMOS

program.

The Stamford-New Haven North and South (STNH-N and STNH-S)

and the experimental Cap Site 2 (CS-2) were the most successful of the

early capped mounds. Bathymetry and SPC data showed that the contami-

nated material was thickly covered with capping material from the center

to the outside radii. Point dumping of mound material and subsequent

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Chapter 10 Case Studies