stored in an insulated container packed with ice or in a 

 refrigerator until delivery to the analytical laboratory. The 

 groundwater sample submitted for priority pollutant metals 

 analysis was filtered in the field after collection. 



4-03. CHEMICAL ANALYSIS 



Groundwater and selected soil samples were submitted to Alpha 

 Analytical Laboratories for chemical analysis. The chemical 

 analyses data and chain-of-custody records are included in 

 Appendix C. 



A. Groundwater Analyses 



Groundwater samples from all three monitoring wells were 

 submitted for testing for volatile organic compounds and 

 total petroleum hydrocarbons by the IR method. 

 Groundwater samples taken from B102-OW and B103-OW were 

 also submitted for analysis for pesticides, PCBs and a 

 petroleum scan. Additionally, groundwater samples from 

 B103-OW were tested for acid/base neutral extractable 

 compounds and dissolved priority pollutant metals, to 

 obtain information on baseline groundwater quality at the 

 site. 



In general, the chemical analyses performed on the 

 groundwater samples indicated the following: 



o No volatile organic compounds were detected above the 

 method detection limits in the groundwater samples 

 taken on-site. 



o No pesticides or PCBs were detected above the method 

 detection limits in the groundwater samples obtained 

 from B102-OW and B103-OW. 



o A total hydrocarbon concentration of 1.3 mg/l (parts 

 per million [ppm]) was detected in the groundwater 

 sample taken from B104-OW. Concentrations above the 

 method detection limit were not detected in the 

 groundwater samples taken from B102-OW and B103-OW. 

 No groundwater standard currently exists for total 

 petroleum hydrocarbons, however, the current 

 Massachusetts guidelines for oil and grease in surface 

 waters is 15 mg/l. 



AQA 



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