---
kind: "section"
citation: "40 C.F.R. § 98.87"
title: "40"
number: "98.87"
heading: "Records that must be retained."
url: "https://uscodex.org/cfr/40/98.87"
---

# §98.87. Records that must be retained.

- (a) If a CEMS is used to measure CO2 emissions, then in addition to the records required by [§ 98.3(g)](/cfr/40/98.3.md?p=g), you must retain under this subpart the records required for the Tier 4 Calculation Methodology in [§ 98.37](/cfr/40/98.37.md).
- (b) If a CEMS is not used to measure CO2 emissions, then in addition to the records required by [§ 98.3(g)](/cfr/40/98.3.md?p=g), you must retain the records specified in this [paragraph (b)](#b) for each portland cement manufacturing facility.
  - (1) **Documentation of monthly calculated kiln-specific clinker CO<I>2</I> emission factor.**
  - (2) **Documentation of quarterly calculated kiln-specific CKD CO<I>2</I> emission factor.**
  - (3) **Measurements, records and calculations used to determine reported parameters.**
- (c) **Verification software records.** You must keep a record of the file generated by the verification software specified in [§ 98.5(b)](/cfr/40/98.5.md?p=b) for the applicable data specified in [paragraphs (c)(1) through (17)](#c-1..c-17) of this section. Retention of this file satisfies the recordkeeping requirement for the data in [paragraphs (c)(1) through (17)](#c-1..c-17) of this section.
  - (1) Identify per kiln per month if clinker is measured directly, or is calculated from raw feed (Equation H-2 of [§ 98.83](/cfr/40/98.83.md) and the method in [§ 98.84(d)](/cfr/40/98.84.md?p=d)).
  - (2) Quantity of raw kiln feed in month from kiln (tons) (Equation H-2 and the method in [§ 98.84(d)](/cfr/40/98.84.md?p=d)).
  - (3) Kiln-specific factor per kiln per month (ton clinker per ton raw feed) (Equation H-2 and the method in [§ 98.84(d)](/cfr/40/98.84.md?p=d)).
  - (4) Quantity of clinker produced in month from kiln (tons) (Equation H-2 and the method in [§ 98.84(d)](/cfr/40/98.84.md?p=d)).
  - (5) Cement kiln dust (CKD) not recycled to the kiln in quarter from kiln (tons) (Equation H-2 and the method in [§ 98.84(d)](/cfr/40/98.84.md?p=d)).
  - (6) Monthly total CaO content of clinker per kiln (weight fraction) (Equation H-3 of [§ 98.83](/cfr/40/98.83.md)).
  - (7) **Monthly non-calcined CaO content of clinker per kiln (weight fraction) (Equation H-3).**
  - (8) **Monthly total MgO content of clinker per kiln (weight fraction) (Equation H-3).**
  - (9) **Monthly non-calcined MgO content of clinker per kiln (weight fraction) (Equation H-3).**
  - (10) Quarterly total CaO content of cement kiln dust not recycled to each kiln (weight fraction) (Equation H-4 of [§ 98.83](/cfr/40/98.83.md)).
  - (11) Quarterly non-calcined CaO content of cement kiln dust not recycled to each kiln (weight fraction) (Equation H-4).
  - (12) Quarterly total MgO content of cement kiln dust not recycled to each kiln (weight fraction) (Equation H-4).
  - (13) Quarterly non-calcined MgO content of cement kiln dust not recycled to each kiln (weight fraction) (Equation H-4).
  - (14) The amount of each raw material consumed annually per kiln (tons/yr (dry basis)) (Equation H-5 of [§ 98.83](/cfr/40/98.83.md)).
  - (15) **The amount of each raw kiln feed consumed annually per kiln (tons/yr (dry basis)) (Equation H-5).**
  - (16) Organic carbon content of each raw material per kiln, as determined in [§ 98.84(c)](/cfr/40/98.84.md?p=c). Default value is 0.002 weight fraction (Equation H-5).
  - (17) Organic carbon content of combined raw kiln feed per kiln, as determined in [§ 98.84(c)](/cfr/40/98.84.md?p=c). Default value is 0.002 weight fraction (Equation H-5).

## Notes

### Amendments

[75 FR 66461, Oct. 28, 2010, as amended at 79 FR 63785, Oct. 24, 2014]

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.

### Amendments

[75 FR 66461, Oct. 28, 2010, as amended at 79 FR 63785, Oct. 24, 2014]