Hdley & Aldtich, Inc. 



Consulting 



Gcotcchnical Engineers, 

 Gcoli)gists and 

 Hytlrogeologisis 



( .imlirKliic-. MA Hi I -4 I 



22 June 1988 

 File No. 06158-10 



Myerson/Allen & Company 



306 Dartmouth Street 



Boston, Massachusetts 02116 



Attention: Mr. David Keller 



Subject: Marine Sediment Sampling and Analysis 



Tudor Wharf, Charlestown, Massachusetts 



Gentlemen: 



In accordance with our proposal dated 25 May 1988 and your 

 telephone request of 19 May, we have completed a program of 

 marine sediment sampling and subsequent bulk sediment analysis 



(BSA) at the proposed dredge area of the Tudor Wharf Site. 

 This work was conducted for purposes of evaluating 

 environmental considerations associated with the construction 

 of a 50-ft. wide by 160-ft. long boat slip dredged to El. 80.0 



(NACA-Datum) immediately west of the existing Tudor Wharf Pier 

 Building, as shown in the sketch provided by Mr. James Fay of 

 Fort Point Associates (FPA) . The approximate limits of the 

 dredge area are shown in Figure 1. 



Marine sediment sampling work included the procurement of three 

 samples, designated BSA-1 through BSA-3 , which were taken on 27 

 May 1988 by Guild Drilling Co., Inc., of E. Providence, Rhode 

 Island, at the locations shown on Figure 1. Observation of 

 sampling and determination of sample locations was observed and 

 documented by H&A. The sampling operations consisted of 

 advancing a decontaminated 5-ft. long by 3-in. di'ameter steel 

 sampling tube to depths ranging from approximately 8 to 13 ft. 

 (El. 78 to El. 83 NACA Datum). Two of the samples, BSA-2 and 

 BSA-3, were taken in the intertidal zone of the mudline, while 

 BSA-1 was obtained below mean low water level (MLW) . Logs of 

 the samples are included in Appendix A. 



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