Section 61.176 - Recordkeeping requirements(a) Each owner or operator subject to the requirements of § 61.172(b)(1) shall maintain at the source for a period of at least 2 years records of the visual inspections, maintenance, and repairs performed on each secondary hood system as required in § 61.172(b)(3) .(b) Each owner or operator subject to the provisions of § 61.172(c) shall maintain at the source for a period of at least 2 years and make available to the Administrator upon request a file of the following records: (1) All measurements, including continuous monitoring for measurement of opacity;(2) Records of emission test data and all calculations used to produce the required reports of emission estimates to demonstrate complaince with § 61.172(c) ;(3) All continuous monitoring system performance evaluations, including calibration checks and adjustments;(4) The occurrence and duration of all startups, shutdowns, and malfunctions of the copper converters;(5) All malfunctions of the air pollution control system;(6) All periods during which any continuous monitoring system or device is inoperative;(7) All maintenance and repairs performed on each air pollution control system, continuous monitoring system, or monitoring device;(8) All records of 1-hour average opacity levels for each separate control device; and(9) For each secondary hood system: (i) The reference flow rates for the horizontal-slotted plenum and exhaust hood for each converter operating mode estabilshed under § 61.175(g) ;(ii) The actual flow rates; and(iii) A daily log of the start time and duration of each converter operating mode.(c) Each owner or operator subject to the provisions of this subpart shall maintain at the source for a period of at least 2 years and make available to the Administrator upon request the following records:(1) For each copper converter, a daily record of the amount of copper matte and lead matte charged to the copper converter and the total hours of operation.(2) For each copper converter department, a monthly record of the weight percent of arsenic contained in the copper matte and lead matte as determined under § 61.174(f) .(3) For each copper converter department, the monthly calculations of the average annual arsenic charging rate for the preceding 12-month period as determined under § 61.174(f) .