The significant digit differences between the RVP standard and the enforcement tolerance arise from EPA's desire to resolve any questions about rounding of RVP measurements when an enforcement tolerance has been applied. Accordingly, for example, the 0.30 psi RVP enforcement tolerance would preclude rounding of the second significant digit of the Rvp standard.(7/1/94)
This question and answer is posted at http://www.epa.gov/otaq/regs/fuels/rfg/qa/420r03009.pdf. The original was posted in the Q&A posted on 7/1/94 which can found at http://www.epa.gov/otaq/rfg_qa.htm" See Question ID 3857 for RFG (Taken from the first question on
Please clarify and resolve the significant digit differences existing between the standard and enforcement tolerance specified, i.e. 8.3 psi RVP with a 0.30 psi enforcement tolerance.
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