In addition to the recordkeeping requirements in § 98.3(g), you must retain the records specified in paragraphs (a) through (d) of this section, as applicable.

(a) If you comply with the CEMS measurement methodology in § 98.243(b), then you must retain under this subpart the records required for the Tier 4 Calculation Methodology in § 98.37, records of the procedures used to develop estimates of the fraction of total emissions attributable to petrochemical processing and combustion of petrochemical process off-gas as required in § 98.246(b), and records of any annual average HHV calculations.

(b) If you comply with the mass balance methodology in § 98.243(c), then you must retain records of the information listed in paragraphs (b)(1) through (4) of this section.

(1) Results of feedstock or product composition determinations conducted in accordance with § 98.243(c)(4).

(2) Start and end times for time periods when off-specification product is produced, if you comply with the alternative methodology in § 98.243(c)(4) for determining carbon content of product.

(3) As part of the monitoring plan required under § 98.3(g)(5), record the estimated accuracy of measurement devices and the technical basis for these estimates.

(4) The dates and results (

(c) If you comply with the combustion methodology in § 98.243(d), then you must retain under this subpart the records required for the applicable Tier Calculation Methodologies in § 98.37. If you comply with § 98.243(d)(2), you must also keep records of the annual average flow calculations.

(d)

(1) Indicate whether the feedstock is measured as mass or volume (Equation X-1 of § 98.243).

(2) Indicate whether you used the alternative to sampling and analysis specified in § 98.243(c)(4) (Equation X-1).

(3) Volume of gaseous feedstock introduced per month (scf) (Equation X-1).

(4) Mass of gaseous feedstock introduced per month (kg) (Equation X-1).

(5) Average carbon content of the gaseous feedstock per month (kg C per kg of feedstock) (Equation X-1).

(6) Molecular weight of gaseous feedstock per month (kg per kg-mole) (Equation X-1).

(7) Indicate whether the gaseous product is measured as mass or volume (Equation X-1).

(8) Volume of gaseous product produced per month (scf) (Equation X-1).

(9) Mass of gaseous product produced per month (kg) (Equation X-1).

(10) Average carbon content of gaseous product (including streams containing CO

(11) Molecular weight of gaseous product per month (kg per kg-mole) (Equation X-1).

(12) Molar volume conversion factor of product (scf per kg-mole) (Equation X-1).

(13) Indicate whether feedstock is measured as mass or volume (Equation X-2 of § 98.243).

(14) Indicate whether you used the alternative to sampling and analysis specified in § 98.243(c)(4) (Equation X-2).

(15) Volume of liquid feedstock introduced per month (gallons) (Equation X-2).

(16) Mass of liquid feedstock introduced per month (kg) (Equation X-2).

(17) Average carbon content of liquid feedstock per month (kg C per gallon) (Equation X-2).

(18) Average carbon content of liquid feedstock per month (kg C per kg of feedstock) (Equation X-2).

(19) Indicate whether product is measured as mass or volume per month (Equation X-2).

(20) Volume of liquid product produced per month (gallons) (Equation X-2).

(21) Mass of liquid product produced per month (kg) (Equation X-2).

(22) Average carbon content of liquid product per month, including organic liquid wastes (kg C per gallon) (Equation X-2).

(23) Average carbon content of liquid product, including organic liquid wastes (kg C per kg of product) (Equation X-2).

(24) Indicate whether you used the alternative to sampling and analysis specified in § 98.243(c)(4) (Equation X-3 of § 98.243).

(25) Mass of solid feedstock introduced per month (kg) (Equation X-3).

(26) Average carbon content of solid feedstock per month (kg C per kg of feedstock) (Equation X-3).

(27) Mass of solid product produced per month (kg) (Equation X-3).

(28) Average carbon content of solid product per month (kg C per kg of product) (Equation X-3).

(29) Records required in § 98.257(b)(1) through (8) of this section for each flare that burns ethylene process off-gas.

(30) Records required in § 98.37 for each stationary fuel combustion unit (or group of stationary sources with a common pipe) that burns ethylene process off-gas, except flares.