The Alaska Methods

AK101   Gasoline Range Organics
This method is designed to measure the concentration of Gasoline Range Organics (GRO) in water and soil. This corresponds to an n-alkane range from the peak start C6 to the peak start of C10 and to a boiling point range between approximately 60 ° C and 170 ° C. This range is also known as Volatile Petroleum Hydrocarbons (VPH) in some states.
Check sheets for reviewing AK101 data: Sample Results and QA/QC.

AK 102    Diesel Range Organics
This method is designed to measure the concentration of Diesel Range Organics (DRO) in water and soil. This corresponds to an n-alkane range from the peak start C10 to the peak start of C25 and to a boiling point range between approximately 170 ° C and 400 ° C. This range is also known as Extractable Petroleum Hydrocarbons (EPH) in some states.
Check sheets for reviewing AK102 data: Sample Results and QA/QC.

AK103    Residual Range Organics
This method is designed to measure the concentration of Residual Range Organics (RRO) in soil. This corresponds to an n-alkane range from the peak start C25 to the peak end of C36 and to a boiling point range between approximately 400 ° C and 500 ° C.
Check sheets for reviewing AK103 data: Sample Results and QA/QC.

NOTE: The Contaminated Sites Program for the Department of Environmental Conservation (DEC) of the State of Alaska has posted a memorandum requesting that all DEC approved laboratories performing volatiles analysis on soil, adjust for moisture content. The link to this memorandum is in the Quick Links to the right under the title "Soil Moisture Corrected Reporting by EPA Method 8000C 3/07/08."

Also note that for the next renewal period of your laboratory approval certificate, the moisture correction must be included in a revised Standard Operating Procedure (SOP).