identified as being present in this sample. The location of 

 this boring was in the vicinity of the abandoned railroad 

 spur. Low concentrations of the thirteen priority pollutant 

 metals and base/neutral extractable compounds were also 

 detected in the fill materials. In general, both the visual 

 and chemical characteristics of the fill materials are believed 

 to be indicative of urban land fill. The presence of low 

 petroleum hydrocarbon concentrations, a variety of metals and 

 certain base/neutral compounds is not unusual for this type of 

 fill material. However, as outlined below, disposal options 

 for excavated fill material may be limited. 



No volatile organic compounds, pesticides, PCBs or acid/base 

 neutral extractable compounds were detected in the groundwater 

 samples taken from the site. A low concentration of total 

 petroleum hydrocarbons was detected in the groundwater sample 

 taken from B104(OW), below the 15 ppm oil and grease standard 

 for surface waters in Massachusetts. Two of the thirteen 

 priority pollutant metals were detected in the groundwater 

 sample taken from B103 (OW) , in excess of the Massachusetts 

 Class I and Class II groundwater standards for selenium and 

 lead. 



In general, the groundwater data is not indicative of a 

 significant groundwater contamination problem. The 

 heterogenous nature of the fill material makes an overall 

 assessment of the fill quality difficult. However, based on 

 the available data, it appears that localized areas of the fill 

 are contaminated by petroleum products, and contain elevated 

 concentrations of some metals, as would be anticipated in this 

 type of fill material. 



5-02. RECOMMENDATIONS 



The oil and hazardous material evaluation conducted for the 

 Tudor Wharf site is preliminary in nature and did not include 

 the entire development parcel. Conclusions concerning the fill 

 and groundwater quality have been based on testing of a limited 

 number of samples from a few test borings. It is recommended 

 that observations of the fill and soil characteristics be 

 carried out during the final design studies for the development 

 including studies for the remaining portion of the development 

 parcel. Additional testing of both soil and groundwater would 

 be appropriate to expand the presently available database. If 

 dredging of the harbor bottom sediments is required, 



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