---
kind: "section"
citation: "40 C.F.R. § 61.176"
title: "40"
number: "61.176"
heading: "Recordkeeping requirements."
url: "https://uscodex.org/cfr/40/61.176"
---

# §61.176. Recordkeeping requirements.

- (a) Each owner or operator subject to the requirements of [§ 61.172(b)(1)](/cfr/40/61.172.md?p=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)](/cfr/40/61.172.md?p=b-3).
- (b) Each owner or operator subject to the provisions of [§ 61.172(c)](/cfr/40/61.172.md?p=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)](/cfr/40/61.172.md?p=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)](/cfr/40/61.175.md?p=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)](/cfr/40/61.174.md?p=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)](/cfr/40/61.174.md?p=f).

## Notes

### Source

Source: 51 FR 28029, Aug. 4, 1986, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.