Laboratory and in-situ testing to verify field 

 classification of soils and to determine engineering 

 properties to aid in developing foundation design criteria. 



Completion of preliminary analysis related to geotechnical 

 engineering aspects of foundation design and site 

 development. 



1-03. ELEVATION DATUM 



To be consistent with other members of the design team, the 

 elevations presented herein are referenced to North Area 

 Central Artery (NACA) Project Datum , wherein El. 0.00 (NACA) 

 is 100.00 ft. below National Geodetic Vertical Datum (NGVD) , 

 formerly USC&GS Mean Sea Level Datum of 1929. 



Tide tables and bottom soundings on many site or navigation 

 plans are referenced to Mean Low Water (MLW) Datum wherein MLW 

 datum is 9 5.42 ft. above NACA Project Datum (El. 0.00 MLW = 

 El. 95.42 NACA) . 



1-04. LIMITATIONS 



This report has been prepared for specific applications to 

 the proposed Tudor Wharf development in Charlestown, 

 Massachusetts, in accordance with generally accepted 

 geotechnical engineering practices. No other warranty, 

 expressed or implied, is made. 



The recommendations presented herein are based, in part, on 

 information from limited subsurface explorations and on 

 proposed development plans that are available to Haley & 

 Aldrich, Inc. at this time. The nature and extent of 

 variations in the subsurface conditions between explorations 

 will not become evident until further explorations are 

 completed and construction is undertaken. If variations 

 appear, it will be necessary to re-evaluate the recommendations 

 presented in this report. If changes to the design or 

 locations of the proposed structures are made, these 

 recommendations should be considered invalid unless confirmed 

 in wri-ting by Haley & Aldrich, Inc. 



Access to that portion of the project east of the brick wall 

 which forms the east property line of the Tudor Wharf paved 

 area was unavailable during this study. Therefore, no 

 explorations were possible in this area, and our conclusion 

 with respect to subsurface conditions and feasible foundation 

 construction should be considered in light of the lack of 

 information in this area. 



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