II. FIELD AND LABORATORY INVESTIGATIONS 



2-01, PREVIOUS TEST BORINGS 



A total of fifteen test borings were previously drilled within 

 the area of the proposed development site. Logs of these 

 borings were obtained from the following sources: 



o Drawing S-1, "Pile Plan," prepared for construction of the 

 concrete frame Paper Storage Warehouse on-shore at Tudor 

 Wharf by Cleverdon, Varney and Pike, Revised 14 September 

 1951. 



o "Geotechnical Data Report, Central Artery - North Area, 

 Vol. II of II," prepared by Goldberg-Zoino Associates, 

 Inc., dated May 1986. 



Ten of the previously drilled fifteen borings were completed 

 for construction of the existing warehouse and were relatively 

 shallow, ranging in depth from 25 to 30 ft. The remaining five 

 borings, which were compiled for the North Area Central Artery 

 Project, were completed to greater depths ranging from 4 to 

 72 ft. The approximate as-drilled locations of each of these 

 sets of borings are shown on Figure 2 ; copies of the individual 

 boring logs are included in Appendix A. 



2-02. RECENT TEST BORINGS 



A preliminary subsurface exploration program was undertaken at 

 the portion of the site which was accessible during the period 

 28 to 31 March 1988 to obtain additional subsurface information 

 for initial project design purposes. Test Borings were 

 completed by Carr-Dee, Corp. of Medford, Massachusetts. The 

 program consisted of three test borings drilled from land using 

 truck mounted rotary drilling equipment to depths approximately 

 56 ft. below ground surface. An additional boring was made 

 from within the existing warehouse pier structure, over water, 

 with a portable skid rig. This boring was conducted by opening 

 an existing hatch in the warehouse floor and inserting drill 

 casing down to the mudline 30 ft. below. The total depth of 

 this boring was approximately 49 ft. below the warehouse 

 floor. The hatch was replaced after completion of the test 

 boring. 



All borings were completed to the west of the brick wall which 

 divides the proposed development site in the north/south 

 direction. The land east of the brick wall was included in the 

 development plans but was not accessible for explorations at 

 the time of this study. 



A9K 



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