What is TPH?

Hint: This term is related to petroleum. This can be found in crude oil.

Complete step by step answer:
TPH (Total petroleum hydrocarbon) is defined by the analytical method that is used to measure it. Conventional TPH measurement techniques quantify only those hydrocarbons that are extracted by the particular method.
There are several hundred of these compounds, but not all occur in any one sample.
Crude oil is used to make petroleum products which can contaminate the environment.
It is useful to measure the total amount of TPH at a site.
Conventional bulk measurements of TPH in a sample are sufficient for screening the acceptability of site concentrations, based upon a comparison with existing TPH regulations.
To the extent that the hydrocarbon extraction efficiency is not identical for each method, the same sample analyzed by different TPH methods will produce different TPH concentrations.
Chemicals that occur in TPH include hexane, benzene, toluene, xylenes, naphthalene, and fluorene, other constituents of gasoline, of jet fuels, of mineral oils, and of other petroleum products.

Note: TPH is the sum of volatile petroleum hydrocarbons (VPH) and extractable petroleum hydrocarbons (EPH). VPH is also known as petrol (or gasoline) range organics (PRO or GRO) and includes hydrocarbons from C6-C10. Diesel range organics (DRO) includes hydrocarbons from C10-C28 and is categorised under EPH.