SECURITY CIA 



Mm 



N OF THIS PAGE 



REPORT DOCUMENTATION PAGE 



Form Approved 

 OMB No- 0704-0188 



la. REPORT SECURITY CLASSIFICATION 

 lassifipd 



lb RESTRICTIVE MARKINGS 



2a. SECURITY CLASSIFICATION AUTHORITY 



2b. DECLASSIFICATION /DOWNGRADING SCHEDULE 



3 DISTRIBUTION /AVAILABILITY OF REPORT 



Approved for public release; distribution 

 unlimited . 



4. PERFORMING ORGANIZATION REPORT NUMBER(S) 



Technical Report EL-88-15 



5 MONITORING ORGANIZATION REPORT NUMBER(S) 



6a. NAME OF PERFORMING ORGANIZATION 

 USAFWES 



Environmental Laboratory 



6b. OFFICE SYMBOL 

 (If applicable) 



7a. NAME OF MONITORING ORGANIZATION 



6c. ADDRESS (ply. State, and ZIP Code) 



PO Box 631 



Vicksburg, MS 39181-0631 



7b. ADDRESS (City. State, and ZIP Code) 



8a. NAME OF FUNDING /SPONSORING 



organization^ Environmental 

 Protection Agency, Region 1 



8b. OFFICE SYMBOL 

 (If applicable) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



8c. ADDRESS (City. State, and ZIP Code) 



J. F. Kennedy Federal Building 

 Boston, Massachusetts 02203-2211 



10. SOURCE OF FUNDING NUMBERS 



11 . title (Include Security Classification) New Bedford Harbor Superlund Project, Acusnnet Kiver r-sfcuary tugi- 

 neering Feasibility Study of Dredging and Dredged Material Disposal Alternatives; Report 7, 

 Settling and Chemical Clarification Tests 



12. PERSONAL AUTHOR(S) 



Wade, Roy 



13a. TYPE OF REPORT 13b. TIME COVERED 14. DATE OF REPORT (Year. Month, Day) 15. PAGE COUNT 

 Report 7 of a series FROM .mi 86_ to j u 1 87 November 1988 67 



16. SUPPLEMENTARY NOTATION 



Available from National Technical Information Service, 5285 Port Royal Road, Springfield, VA 

 22161. 



COSATI CODES 



FIELD 



GROUP 



SUB-GROUP 



18. SUBJECT TERMS (Continue on reverse if necessary and identify by block number) 

 Chemical clarification Flocculant 

 Compression Zone 

 Confined disposal facility 



19. ABSTRACT (Continue on reverse if necessary and identify by block number) 



One alternative for cleanup of the New Bedford Harbor Superfund site is dredging the 

 contaminated sediments and placement into an upland or intertidal confined disposal 

 facility (CDF) . The conceptual design of either facility requires an evaluation of the 

 settling properties of the dredged material to estimate storage requirements and effluent 

 suspended solids concentrations. Suspended solids reduction beyond gravity settling may be 

 achieved by chemical clarification. 



Laboratory column tests were performed on three sediments: the composite, the hot 

 spot, and the capping sediments. Their settling behavior was observed to be typical of 

 other marine sediments if hydraulically dredged and placed in a CDF. The compression test 

 data were used to develop the initial storage requirements. The zone settling velocity was 

 found not to be a controlling factor in the storage design; therefore, zone tests were not 



(Continued) 



20. DISTRIBUTION /AVAILABILITY OF ABSTRACT 

 13 UNCLASSIFIED/UNLIMITED □ SAME AS RPT. 



□ OTIC USERS 



21. ABSTRACT SECURITY CLASSIFICATION 



Unclassified 



22a. NAME OF RESPONSIBLE INDIVIDUAL 



22b TELEPHONE (Include AreaCode) 22c. OFFICE SYMBOL 



DD Form 1473, JUN 86 



Previous editions are obsolete. 



SECURITY CLASSIFICATION OF THIS PAGE 



Unclassified 



