CFR 40-1065.545-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.545:Verification of proportional flow control for batch sampling.
For any proportional batch sample such as a bag or PM filter, demonstrate that proportional sampling was maintained using one of the following, noting that you may omit up to 5% of the total number of data points as outliers:
CFR 40-1065.545-2014 history
2014CFR 40-1065.545-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.545:Verification of proportional flow control for batch sampling.