Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:8260b
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 8260B
Character Range: 802633–803822

8260B  GC/MS

    10.1.5     Total recoverable hydrocarbons - volatile
The term 'TRH' (total recoverable hydrocarbons) is equivalent to the previously used term 'TPH' (total petroleum hydrocarbons), and represents extracted biogenic and petrogenic (petroleum) hydrocarbons by selected solvents. The new terminology has been chosen to avoid confusion with past practices.

TRH fractions are based on newly derived health screening levels (HSL) for petroleum hydrocarbon products.

The vTRH method is applicable but not limited to analysis of volatile hydrocarbons which may be constituents or residues present in or from materials such as the following:
    petrol
    dry cleaning liquids
    industrial solvents
    paints, thinners and strippers.

10.1.5.1     Scope
This method, which is a modified version of the 'closed-system purge and trap and extraction for volatile organics in soil and waste samples method' (Method 5035), is applicable to hydrocarbons eluting between nC6 and nC10. A clean-up procedure is not applicable here since only the volatile components are being investigated.

10.1.5.2     Sample extraction
The table below lists the specified US EPA SW-846 method.