Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:32
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 32
Character Range: 185215–186469

32                                        -2.112                   -2.112

Case B: the manufacturer's evidence of production standard deviation is either not satisfactory or not available.
               With a minimum sample size of 3, the sampling procedure is set so that the probability of a lot passing a test with 40 per cent of the production defective is 0.95 (producer's risk = 5 per cent) while the probability of a lot being accepted with 65 per cent of the production defective is 0.l (consumer's risk = 10 per cent).

              The measurements of the criteria emissions given in Table 1B of paragraph 6.3.10. of this Regulation are considered to be log normally distributed and shall first be transformed by taking their natural logarithms. Let m0 and m denote the minimum and maximum sample sizes respectively (m0 = 3 and m = 32) and let n denote the current sample number.

               If the natural logarithms of the measurements in the series are x1, x2 ..., xi and L is the natural logarithm of the limit value for the pollutant, then define:

              d1 = x1 – L

              and

           Table A2/2
              Minimum sample size = 3

Sample size (n)  Pass decision threshold (An)  Fail decision threshold (Bn)