What is Tphcwg?

The Total Petroleum Hydrocarbon Criteria Working Croup (TPHCWG) was formed in 1993 based on the observation that widely different clean-up requirements were being used by states at sites that were contaminated with hydrocarbon materials such as fuels, lubricating oils, and crude oils.

What are examples of petroleum hydrocarbons?

These groups are called petroleum hydrocarbon fractions. Each fraction contains many individual chemicals. Some chemicals that may be found in TPH are hexane, jet fuels, mineral oils, benzene, toluene, xylenes, naphthalene, and fluorene, as well as other petroleum products and gasoline components.

What are extractable petroleum hydrocarbons?

3.10 Extractable Petroleum Hydrocarbons (EPH) are defined as collective fractions of hydrocarbon compounds eluting from n-nonane to n-hexatriacontane, excluding Target PAH Analytes. ISs are used as the basis for quantitation of the method’s target analytes when GC/MS is utilized.

Does TPH include BTEX?

Specific contaminants that are components of TPH, such as BTEX (benzene, toluene, ethylbenzene, and xylene), n-hexane, jet fuels, fuel oils, and mineral-based crankcase oil, have been studied by ATSDR and a number of toxicological profiles have been developed on individual constituents and petroleum products.

Is TPH a VOC?

Extensive speciated total petroleum hydrocarbon (TPH), polyaromatic hydrocarbon (PAH), volatile organic compound (VOC) and semi-volatile organic compound (SVOC) soil and groundwater testing was undertaken as part of the contamination investigation and assessment for a former railway station and bitumen emulsion depot …

What is diesel range organics?

Diesel range organics is an operation definition of any synthetic and/or naturally occurring organic compound that happens to be in the same boiling point range as diesel fuel. Since the FID used to analyze samples is a non-selective detector, many non-diesel fuel compounds present in a sample will be counted as DRO.

Is Naphthalene a petroleum product?

Most naphthalene is derived from coal tar. From the 1960s until the 1990s, significant amounts of naphthalene were also produced from heavy petroleum fractions during petroleum refining, but today petroleum-derived naphthalene represents only a minor component of naphthalene production.

What are petroleum hydrocarbons used for?

Petroleum hydrocarbons are commonly found environmental contaminants, though they are not usually classified as hazardous wastes. Many petroleum products are used in modern society, including those that are fundamental to our lives (i:e., transportation fuels, heating and power-generating fuels).

Is tph a VOC?

Are petroleum hydrocarbons VOCs?

Petroleum contains a wide variety of volatile organic compounds (VOCs). Due to their low boiling points, VOCs can be emitted to the atmosphere and immediately contaminate the air. Most of the sources use products generated from petroleum.

How are crude oil products classified as tph?

Crude oil and individual refinery products are typically characterized as TPH in environmental media. Petroleum refining is the process of separating the many compounds present in crude oil by boiling it and taking distillation cuts at different temperatures (Figure 4-1).

Can a tph analysis be limited to hydrocarbons?

The analytical methods may not limit the quantification solely to just hydrocarbons (i.e., compounds containing only hydrogen and carbon), but can include nonhydrocarbons from naturally occurring organic matter, chemicals, and petroleum-derived metabolites. The mixture will change as it weathers in the environment.

What is the definition of total petroleum hydrocarbons?

Assessment of these mixtures is through the estimation of total petroleum hydrocarbons (TPH), a gross quantification without identification of individual constituents. In general, TPH is defined as the measurable amount of petroleum hydrocarbon in an environmental media.

How does the composition of TPH affect the environment?

The mixture will change as it weathers in the environment. Furthermore, compositions of mixtures quantified as “TPH” might be similar for nonaqueous phase liquid (NAPL), residual, and highly contaminated soils, but radically different for either water or air samples. This affects the assessment of risk to humans or ecological receptors.