TPHs comprise wide range of compounds and include various compounds used in our daily life such as gasoline, diesel, fuel oils, lubricants and engine oil. Because in the past few years foreign oils and gasoline have been allowed to be imported into the country, the gas stations have become privatized and the use of automobiles and motorcycles has been on the rise. Consequently, there is a need to have a testing methods to be used to determine to the levels of pollution in such incidents so as to be used as a basis for the subsequent clean-up operation and punitive fine.
When an incident of pollution occurs, it will be very important to be able to swiftly determine the level or concentration of pollution and identify the type of pollutant. In this project, a set of fast pollutant screening method is established and such method may be used to determine the types of pollutants (gasoline, diesel or oil that has a larger molecular weight than diesel); then, according to the screening result, suitable preliminary handling method, analytical method and quantitative method may be selected. In this project, a testing method by using GC/FID is established, and the method may be employed to carry out simultaneous analyses of diesel and oils that have a larger molecular weight than diesel. In the project, testing methods to evaluate the levels or concentrations of TPHs contained in soil employed by various countries have been gathered, and the advantages, disadvantages and adaptability of these methods have been evaluated so as to establish a set of testing method that is suitable to be used for this country. Also, in the project, we suggest the range of pollution level determination of the soil method covers the range from C6 to C40 . In the project, according to the test results, the RSD (i.e., precision) and X value (i.e., accuracy) for diesel pollution level are 9.6% and 73.3 to 108.1%, respectively; and the RSD (i.e., precision) and X value (i.e., accuracy) for engine oil pollution level are 3.47% and 94.6 to 108.7%, respectively.