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Summary

The Atlantic RBCA petroleum hydrocarbon method consists of two procedures:

  • A Tier I method involving an initial evaluation to assess whether the benzene, toluene, ethylbenzene and xylene(s) (BTEX) and/or total petroleum hydrocarbon (TPH) concentration minus BTEX has exceeded a generic risk-based screening level. This procedure reports the volatile petroleum hydrocarbons (C6-C10) including BTEX (VPH analysis), the extractable hydrocarbons (>C10-C32) (EPH analysis) as well as the modified TPH (sum of C6-C32 less BTEX). Refer to Section 4.1 for the Tier I reporting format.

  • A Tier II method to assess site-specific risk conditions. As in the Tier I analysis, the procedure consists of a VPH analysis, an EPH analysis as well as the calculation of modified TPH. In the Tier II analysis, both the VPH and EPH ranges are subdivided into aromatic and aliphatic fractions and narrower carbon ranges are reported as well. Refer to Section 4.2 for the Tier II reporting format.

Disclaimer:

This document provides guidelines for the analysis of Petroleum Hydrocarbons in water and soil as part of Atlantic RBCA site remediation methodology. It is not intended to be a detailed laboratory procedure, but rather to outline required and performance-based elements of any method used.

This document was created by the PIRI Analytical Laboratory Sub-committee in response to terms of reference outlined by the Atlantic PIRI committee. It is based on the Version 1.0 (draft) document issued in 1999 and incorporates various improvements made by the laboratories in the region over time.


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Guidelines for Laboratories
Version 2.0

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