In this Episode 15, we discuss "What Does TPH Mean and Why is it The BEST Remediation Measurement?"

TPH stands for Total Petroleum Hydrocarbons. TOTAL means ANY and ALL captured and provided in a single measurement.

GRO stands for Gasoline Range Organics. This typically covers the carbon number ranges of C6-12.

DRO stands for Diesel Range Organics. This typically covers the carbon number ranges of C10-28.

These are typically the primary focus.

However there is also ORO which stands for Oil Range Organics which covers the carbon number range from C20-35.

TPH (TOTAL Petroleum Hydrocarbons) encompasses all three of these ranges from C6-35.

Likewise and similarly, other typical ranges of focus are VPH (Volatile Petroleum Hydrocarbons) which typically covers the lighter more volatile hydrocarbons like Gasoline (like GRO) and EPH (Extractable Petroleum Hydrocarbons) which typically covers the heavier hydrocarbons like Diesel and Oils (like DRO and ORO).

And again, TPH (TOTAL Petroleum Hydrocarbons) encompasses both VPH and EPH as a single measurement.

So while monitoring Remediation work, using a TPH measurement covering ANY and ALL ranges, is the BEST Measurement to use. Then once the desired threshold of interest is met and Confirmatory Samples are sent for Laboratory Analysis, that's when the individual ranges can be of concern to comply with the different State Agency requirements.

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