How do I use the TPH values in the Tier I Look Up Table when comparing them to the TPH reports received from the laboratory?
The Modified TPH values in the Look Up Table have different values in each of the three columns sub-titled gasoline, diesel/#2 fuel oil and #6 oil (heavy oil). Modified TPH is Total TPH minus the BTEX compounds. Use the column that describes the type of petroleum source that has created the contaminated site. For example, if the source is gasoline, the lab report is compared to the Modified TPH criteria under the gasoline column. The Look Up Table value in the gasoline column is the not the allowable level of C6-C10 hydrocarbon as reported by a laboratory. The Look Up Table value is to be compared to the total petroleum hydrocarbon measured at the site less the concentration of the BTEX parameters. If two products have spilled and mixed (i.e. gasoline and diesel) use the lowest value under either the gasoline or diesel columns. If two contaminants are present on the same site but clearly separated, they may be treated as two different source areas using the appropriate column criteria.
Related Questions
- How do I use the TPH values in the Tier I Look Up Table when comparing them to the TPH reports received from the laboratory?
- How Do You Look Up Values From One Microsoft Access Table And Automatically Insert Them In Another Table?
- Why do the laboratory values look similar to refeeding syndrome for tubefeeding patients?
