Unique PT Requirements

PAHs by HPLC

• The concentrations of PAH analytes in PT samples submitted for polynuclear aromatic hydrocarbons (PAHs) by High Performance Liquid Chromatography (HPLC) technology must be representative of the lower concentration ranges detectable by HPLC.
• PAH PT samples with higher concentrations representative of the ranges detectable by GC or GC/MS will not be accepted for certification under the HPLC technology.
• When ordering reference samples for PAHs by HPLC, request PT samples in the concentration range appropriate for HPLC analysis by the State of Wisconsin.

Underground Storage Tank (UST) Parameters

There are many different PT formulations available for underground storage testing. Wisconsin requires PTs for GRO and DRO to mirror the formulation of standards as described in its unique methodologies. 'Real world' PTs composed of a specific oil or gasoline formulations are not acceptable.

Diesel Range Organics (DRO)

Requires a PT sample containing the even-numbered alkanes from C-10 to C-28.
Analysis using the Wisconsin specific DRO method is required.

Gasoline Range Organics (GRO)

Analysis using the Wisconsin specific GRO method is required.
Requires a PT sample containing each of the following 10 analytes:
Benzene          1,2,4-Trimethylbenzene
Ethylbenzene    1,3,5-Trimethylbenzene
Toluene           MtBE (Methyl tert-butyl ether)
m-Xylene         Naphthalene
p-Xylene
o-Xylene

Petroleum Volatiles (PVOC)

Essentially a GRO PT excluding Naphthalene. A GRO PT sample can usually be analyzed for both GRO and PVOC simultaneously. Requires a PT sample containing each of the following 9 analytes:
Benzene          1,2,4-Trimethylbenzene
Ethylbenzene    1,3,5-Trimethylbenzene
Toluene           MtBE (Methyl tert-butyl ether)
m-Xylene
p-Xylene
o-Xylene