Virginia regulations · Through 2026 Regular Session (effective July 1, 2026)

9VAC5-40-2560: Standard for particulate matter

A. No owner or other person shall cause, or permit to be discharged into the atmosphere from any lightweight aggregate process operation any particulate emissions in excess of the limits in Table 4-19.

TABLE 4-19

Process Weight Rate

Tons/Hr

Maximum Allowable Emission Rate

Lb/Hr

.05 or less

.176

.10

.351

.20

.702

.30

1.053

.40

1.404

.50

1.76

.75

2.64

1.0

3.51

1.25

5.27

1.75

6.15

2.0

7.02

4.0

14.0

6.0

21.1

8.0

28.1

10.0

35.1

15.0

52.7

20.0

70.2

25.0

87.8

30.0

105.0

35.0

123.0

40.0

140.0

45.0

158.0

50.0

176.0

B. Except as provided in subsection C of this section, interpretation of the emission standard in subsection A of this section shall be in accordance with 9VAC5-40-22.

C. For a process weight rate between any two consecutive rates in Table 4-19, or for rates over 50 tons per hour, the maximum allowable emission rate may be calculated by the following equation:

E = 3.51 P

where:

E = emission rate in lb/hr.

P = process weight rate in tons/hr.

Where this section sits in the code

Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 40. Existing Stationary Sources
Part II. Emission Standards
Article 19. Emission Standards for Lightweight Aggregate Process Operations (Rule 4-19)