29 



Near-bottom DO concentrations measured at the reference areas and the "D" disposal 

 point ranged from 4.1 to 4.5 mg-1" 1 . Although lower overall relative to near-surface values 

 (9.2 - 11.8 mg-1" 1 ), near-bottom DO content remained above hypoxic levels. The health and 

 condition of the benthic environment at WLIS and its response to dredged material disposal 

 are considered to be influenced significantly by the regionwide, near-bottom hypoxic events 

 which can occur in Long Island Sound. Historical evidence indicates that bottom- water 

 hypoxia is becoming more persistent in the summertime in Long Island Sound, presumably 

 from increased nutrient input (e.g., from sewage treatment plants) and consequent 

 eutrophication (Parker and O'Reilly 1991). 



6.2.3 References for Section 6.2 



Germano, J. D.; Parker, J; Williams, R. W. 1993. Monitoring cruise at the Western Long 

 Island Sound Disposal Site, July 1990. DAMOS Contribution No. 85 (SAIC Report 

 No. SAIC-90/7598&C92). US Army Corps of Engineers, New England Division, 

 Waltham, MA. 



Parker, C. A.; O'Reilly, J. E. 1991. Oxygen depletion in Long Island Sound: a historical 

 perspective. Estuaries 14:248-264. 



SAIC. 1982. Baseline survey of the proposed Western Long Island Sound III Dredged 



Material Disposal Site, January 1982. DAMOS Contribution No. 19. US Army Corps 

 of Engineers, New England Division, Waltham, MA. 



SAIC. 1987a. Seasonal monitoring cruise at the Western Long Island Sound Disposal Site, 



August 1986. DAMOS Contribution No. 61 (SAIC Report No. SAIC-87/7500 &C61). 

 US Army Corps of Engineers, New England Division, Waltham, MA. 



SAIC. 1987b. REMOTS® reconnaissance mapping of near-bottom dissolved oxygen: Central 

 to Western Long Island Sound, August 1986. SAIC Report No.87/7502&132. US 

 Environmental Protection Agency, Region I, Boston, MA. 



SAIC. 1988a. A summary of DAMOS physical monitoring of dredged material disposal 



activities. SAIC Report No. SAIC-88/7527&C71. Final report submitted to US Army 

 Corps of Engineers, Waterways Experiment Station, Vicksburg, MS. 



SAIC. 1988b. Monitoring surveys at the Western Long Island Sound Disposal Site, August 

 and October 1985. DAMOS Contribution No. 55 (SAIC Report No. SAIC- 

 86/75 10&C55). US Army Corps of Engineers, New England Division, Waltham, 

 MA. 



DAMOS Summary Report, 1985-1990 



