Procedures for estimating missing data.

A complete record of all measured parameters used in the GHG quantities calculations is required. Whenever the monitoring procedures cannot be followed, you must use the following missing data procedures: (a) A quarterly flow rate of CO 2 received that is missing must be estimated as follows: (1) Another calculation methodology listed in § 98.444(a)(1) must be used if possible. (2) If another method listed in § 98.444(a)(1) cannot be used, a quarterly flow rate value that is missing must be estimated using a representative flow rate value from the nearest previous time period. (b) A quarterly mass or volume of contents in containers received that is missing must be estimated as follows: (1) Another calculation methodology listed in § 98.444(a)(2) must be used if possible. (2) If another method listed in § 98.444(a)(2) cannot be used, a quarterly mass or volume value that is missing must be estimated using a representative mass or volume value from the nearest previous time period. (c) A quarterly CO 2 concentration of a CO 2 stream received that is missing must be estimated as follows: (1) Another calculation methodology listed in § 98.444(a)(3) must be used if possible. (2) If another method listed in § 98.444(a)(3) cannot be used, a quarterly concentration value that is missing must be estimated using a representative concentration value from the nearest previous time period. (d) A quarterly quantity of CO 2 injected that is missing must be estimated using a representative quantity of CO 2 injected from the nearest previous period of time at a similar injection pressure. (e) For any values associated with CO 2 emissions from equipment leaks and vented emissions of CO 2 from surface equipment at the facility that are reported in this subpart, missing data estimation procedures should be followed in accordance with those specified in subpart W of this part. (f) The quarterly quantity of CO 2 produced from subsurface geologic formations that is missing must be estimated using a representative quantity of CO 2 produced from the nearest previous period of time. (g) You must estimate the mass of CO 2 emitted by surface leakage that is missing as required by your approved MRV plan. (h) You must estimate other missing data as required by your approved MRV plan. [75 FR 75078, Dec. 1, 2010, as amended at 76 FR 73906, Nov. 29, 2011]