43 C.F.R. § 3175.117 – On-line gas chromatographs.

(a) On-line GCs must be installed, operated, and maintained under GPA 2166-05, Appendix D (incorporated by reference, see § 3175.30), and the manufacturer's specifications, instructions, and recommendations.
(b) The GC must comply with the verification and calibration requirements of § 3175.118. The results of all verifications must be submitted to the AO upon request.
(c) Upon request, the operator must submit to the AO the manufacturer's specifications and installation and operational recommendations.