16 



Table 2-1. 



Methods of Physical and Chemical Analyses for WLIS Samples 



WLIS Samples 



Analysis 



Method 



Instrumentation 



All samples 



Grain Size 



ASTM D422 



SW-846 Method 

 (USEPA 1997) 



Sieve/Hydrometer 



All samples 



Total Organic Carbon 



9060 





All samples 



PAHs 



8270 



GC/MS-SIM 



All samples 



Trace Metals: 









Aluminum 



6010 



ICAP-AES 





Arsenic 



7060 



GFAA 





Cadmium 



7131 



GFAA 





Chromiimi 



6010 



ICAP-AES 





Copper 



6010 



ICAP-AES 





Lead 



6010 



ICAP-AES 





Mercury 



7471 



CVAA 





Nickel 



6010 



ICAP-AES 





Zinc 



6010 



ICAP-AES 



All samples 



Pesticides/PCBs 



8080A 



GC-ECD 



PAHs = Polynuclear Aromatic Hydrocarbons 



GC/MS-SIM = Gas Chromatograph/Mass Spectrometer-Selected Ion Monitoring 



GC-ECD = Gas Chromatograph-Electron Capture Device 



ICAP-AES = Inductively Coupled Argon Plasma - Atomic Emission Spectrometry 



GFAA = Graphite Furnace Atomic Absorption 



CVAA = Cold Vapor Atomic Absorption 



PCBs = Polychlorinated Biphenyls 



differential settling rates of particles. Data on grain size were converted from units of phi 

 (Wentworth 1922) to units of gravel, sand, silt, and clay. 



Total organic carbon (TOC) analyses were performed using EPA SW-846 Method 

 9060 (EPA 1997) by the WHG laboratory-. Dried sediment aliquots were pulverized and 

 homogenized prior to analysis. For each day of analysis, two reference samples were 

 analyzed as laboratory control samples (LCS) prior to and after the WLIS samples. In 

 general, organic carbon is measured using a carbonaceous analyzer which converts the 

 organic carbon in a sample to carbon dioxide (CO2) by either catalytic combustion or wet 

 chemical oxidation. The CO2 formed is then either measured directly by an infrared detector 

 or converted to methane (CH4) and measured by a flame ionization detector. The amount of 

 CO2 or CH4 in a sample is directly proportional to the concentration of carbonaceous material 

 in the sample. Results expressed in this report are on a dry weight basis. 



Monitoring Cruise at the WLIS Disposal Site, September 1997 and March 1998 



