Code of Federal Regulations > Title 30 > Chapter I > Part 70 > Subpart C > Appendix - Table 70-2 to Subpart C of Part 70—Excessive Concentration Values (ECV) Based on the Average of 5 or 15 Full-Shift CMDPSU/CPDM Concentration Measurements

Regulations last checked for updates: Jan 31, 2025

Title 30 - Mineral Resources last revised: Jan 17, 2025

Appendix - Table 70-2 to Subpart C of Part 70—Excessive Concentration Values (ECV) Based on the Average of 5 or 15 Full-Shift CMDPSU/CPDM Concentration Measurements

Link to an amendment published at 89 FR 28476, Apr. 18, 2024.

Applicable standard (mg/m ³)	ECV (mg/m ³) based on 5-sample average		ECV (mg/m ³) based on 15-sample average
Applicable standard (mg/m ³)	CMDPSU	CPDM	CMDPSU	CPDM
2.0	2.15	2.12	2.09	2.07
1.9	2.05	2.01	1.99	1.97
1.8	1.94	1.91	1.89	1.87
1.7	1.84	1.80	1.78	1.76
1.6	1.74	1.70	1.68	1.66
1.5	1.63	1.59	1.58	1.56
1.4	1.53	1.49	1.48	1.45
1.3	1.43	1.38	1.38	1.35
1.2	1.33	1.27	1.28	1.25
1.1	1.22	1.17	1.17	1.14
1.0	1.12	1.06	1.07	1.04
0.9	1.02	0.96	0.97	0.94
0.8	0.92	0.85	0.87	0.83
0.7	0.81	0.75	0.77	0.73
0.6	0.71	0.64	0.67	0.63
0.5	0.61	0.53	0.57	0.52
0.4	0.51	0.43	0.47	0.42
0.3	0.41	0.32	0.37	0.32
0.2	0.31	0.22	0.27	0.21

authority: 30 U.S.C. 811,813,957

source: 59 FR 8327, Feb 18, 1994, unless otherwise noted.