Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3175.113 Spot samples—general requirements

(i) Be constructed of stainless steel;

(ii) Be cleaned under GPA 2166–05, Appendix A (incorporated by reference, see § 3175.30), or an equivalent method, prior to sampling. The operator must maintain documentation of cleaning (see § 3170.7), have the documentation available on site during sampling, and provide it to the BLM upon request;  and

(iii) Be operated under GPA 2166–05, Appendix B.3 (incorporated by reference, see § 3175.30).

(i) For low- and very-low-volume FMPs, at least three samples must be taken and analyzed;

(ii) For high-volume FMPs, samples must be taken and analyzed until the difference between the maximum heating value and minimum heating value calculated from three consecutive analyses is less than or equal to 16 Btu/scf;

(iii) For very-high-volume FMPs, samples must be taken and analyzed until the difference between the maximum heating value and minimum heating value calculated from three consecutive analyses is less than or equal to 8 Btu/scf.

(i) The mean heating value and relative density calculated from the three analyses required in paragraph (d)(5) of this section;

(ii) The median heating value and relative density calculated from the three analyses required in paragraph (d)(5) of this section;  or

(iii) Any other method approved by the BLM.