scope:

Forward

The "Precision Criteria" derived from the work behind RR-188 and the data regression described in TP-31 may be significantly tighter in many cases than what was listed in previous revisions of GPA 2261 and GPA 2177.

Therefore, the determination of what constitutes a "Pass/Fail" may need to be based on more than a single component failing to meet the precision criteria (depending on the degree of failure). It is feasible that an instrument could fail to meet the new "Precision Criteria", yet produce analytical results that are acceptable otherwise.

Agreements between parties should consider this and determine "Pass/Fail" based on actual impact of the instrument performance. Some parameters other than concentration for consideration are Heating Value, Relative Density and Theoretical Hydrocarbon Liquid Content.