40 CFR 63.7752 - What records must I keep?
(a) You must keep the records specified in paragraphs (a)(1) through (4) of this section:
(1) A copy of each notification and report that you submitted to comply with this subpart, including all documentation supporting any initial notification or notification of compliance status that you submitted, according to the requirements of § 63.10(b)(2)(xiv).
(4) Records of the annual quantity of each chemical binder or coating material used to coat or make molds and cores, the Material Data Safety Sheet or other documentation that provides the chemical composition of each component, and the annual quantity of HAP used in these chemical binder or coating materials at the foundry as calculated from the recorded quantities and chemical compositions (from Material Data Safety Sheets or other documentation).
(b) You must keep the following records for each CEMS.
(1) Records described in § 63.10(b)(2)(vi) through (xi).
(3) Request for alternatives to relative accuracy tests for CEMS as required in § 63.8(f)(6)(i).
(c) You must keep the records required by §§ 63.7743, 63.7744, and 63.7745 to show continuous compliance with each emissions limitation, work practice standard, and operation and maintenance requirement that applies to you.