§80.155. Sampling, testing, and measurement. — Inbound Citations

(1) All sampling, testing, and measurements must be done in accordance with § 80.155.

(1) All sampling, testing, and measurements must be done in accordance with § 80.155.

(1) All measurements must be done in accordance with § 80.155.

(1) All measurements must be done in accordance with § 80.155.

(5) RNG producers must use the measurement procedures specified in § 80.155 to determine the heating value of RNG for the generation of RINs.

(4) The batch volume of biogas supplied to the downstream party, in Btu HHV and scf, as measured under § 80.155.

(C) The volume of biogas injected into the biogas closed distribution system and the volume of biogas used as process heat were measured under § 80.155.

(vi) Documents supporting the sampling, storage, testing, and measurement results relied upon under § 80.155, including all results, maintenance records, and calibration records.

(i) Determine the volume of RNG, in Btu LHV, injected into the natural gas commercial pipeline system as specified in § 80.155.

(B) Report as a finding any method that is not specified in § 80.155 or the biogas producer's registration.

(1) Verify that the biogas was measured as required under § 80.155.

(1) 3 Part 1, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters Part 1: General Equations and Uncertainty Guidelines, 4th Edition, including Errata July 2013, Reaffirmed, July 2022; IBR approved for § 80.155(a).

(E) A comparison between the accuracy, precision, and reliability of the alternative measurement protocol and the requirements specified in § 80.155(a)(1), including any supporting data.

(iii) For an alternative measurement protocol under § 80.155(a)(2), all the following:

(C) A description of all routine maintenance and the frequency that such maintenance will be conducted.

(D) A description of the frequency of all measurements and how often such measurements will be recorded under the alternative measurement protocol.

(E) A comparison between the accuracy, precision, and reliability of the alternative measurement protocol and the requirements specified in § 80.155(a)(1), including any supporting data.

(1) API MPMS 14.1-2016, Manual of Petroleum Measurement Standards Chapter 14—Natural Gas Fluids Measurement Section 1—Collecting and Handling of Natural Gas Samples for Custody Transfer, 7th Edition, May 2016 (API MPMS 14.1); IBR approved for § 80.155(b).

(i) A certificate of analysis from an independent laboratory for a representative sample of the biogas produced at the biogas production facility as specified in § 80.155(b).

(vi) Except as specified in § 80.155(b)(2)(vii), an RNG producer does not need to test for a parameter specified in § 80.155(b)(2) if the parameter is not included in the pipeline specifications submitted at registration under paragraph (d)(5) of this section.

(vi) Except as specified in § 80.155(b)(2)(vii), an RNG producer does not need to test for a parameter specified in § 80.155(b)(2) if the parameter is not included in the pipeline specifications submitted at registration under paragraph (d)(5) of this section.

(C) Collect a daily representative sample of each cellulosic biogas feedstock and test for total solids and volatile solids as specified in § 80.155(c).

(1) SM 2540, Solids, revised June 10, 2020; IBR approved for § 80.155(c).

(D) For facilities using composite sampling under § 80.155(c)(3), a composite sampling plan, including all the following:

(1) A description of when and where the samples will be collected.

(2) A description of how the samples will be stored prior to testing.

(3) A description of how daily representative samples will be mixed, including how the ratio of each sample will be determined.

(4) A description of how often testing will occur.

(5) A description of how the plan complies with § 80.155(c)(2).

(D) For facilities using composite sampling under § 80.155(c)(3), a composite sampling plan, including all the following:

(1) A description of when and where the samples will be collected.

(2) A description of how the samples will be stored prior to testing.

(3) A description of how daily representative samples will be mixed, including how the ratio of each sample will be determined.

(4) A description of how often testing will occur.

(5) A description of how the plan complies with § 80.155(c)(2).

(D) Measure and calculate the digester operating conditions as specified in § 80.155(d).

(8) ASTM D3588-98 (Reapproved 2024)e1, Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels, approved May 1, 2024 (ASTM D3588); IBR approved for § 80.155(b) and (f).

(ii) All volumes reported to EPA in Btu under this section must be converted according to § 80.155(f), if applicable.