40 CFR 63.1456 - What records must I keep and how long must I keep my records?
(a) You must keep the records listed in paragraphs (a)(1) through (7) 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 in § 63.10(b)(2)(xiv).
(4) For each monitoring system, you must keep the records specified in paragraphs (a)(4)(i) through (iv) of this section.
(i) Records described in § 63.10(b)(2)(vi) through (xi).
(5) For each performance test you conduct to demonstrate compliance with an opacity limit according to § 63.1450(c), you must keep the records specified in paragraphs (a)(5)(i) through (ix) of this section.
(i) Dates and time intervals of all opacity observation period segments;
(ii) Description of overall smelter operating conditions during each observation period. Identify, if any, the smelter copper production process equipment that was out-of-service during the performance test and explain why this equipment was not in operation;
(iv) Name, title, and affiliation for each indoor process monitor participating in the performance test;
(vi) Copies of all indoor process monitor operating log sheets;
(vii) Copies of all data summary sheets used for data reduction;
(ix) Documentation according to the requirements in § 63.1450(c)(9)(iv) to support your selection of the site-specific capture system operating limits used for each batch copper converter capture system when blowing.
(i) Records of alarms for each bag leak detection system.
(ii) Description of the corrective actions taken following each bag leak detection alarm.
(7) For each control device other than a baghouse or venturi wet scrubber subject to site-specific operating limits in § 63.1444(g) or § 63.1446(f), you must keep documentation according to the requirements in § 63.1450(a)(5)(iv) to support your selection of the site-specific operating limits for the control device.
(b) Your records must be in a form suitable and readily available for expeditious review, according to § 63.10(b)(1).
(d) You must keep each record on site for at least 2 years after the date of each occurrence, measurement, maintenance, corrective action, report, or record, according to § 63.10(b)(1). You can keep the records off site for the remaining 3 years.