A. The owner or operator of new potash, salt or sodium sulfate processing equipment shall not permit, cause, suffer or allow particulate matter emissions to the atmosphere:

(1) to exceed 0.10 grains per dry cubic foot of discharge gas adjusted to standard conditions from dryers; or

(2) to exceed 0.04 grains per dry cubic foot of discharge gas adjusted to standard conditions from all other processing equipment.

B. The owner or operator of existing potash, salt or sodium sulfate processing equipment shall not permit, cause, suffer or allow particulate matter emissions to the atmosphere:

(1) in excess of a total of 90 pounds per hour from all stacks serving equipment used in drying muriate of potash and all associated compactor operations;

(2) in excess of a total of 90 pounds per hour from all stacks serving equipment used in drying langbeinite;

(3) in excess of a total of 35 pounds per hour from all stacks serving equipment used in drying sulfate of potash and associated screening operations;

(4) in excess of a total of 15 pounds per hour from all stacks serving equipment used in dry milling of fine langbeinite; and

(5) in excess of a total of 50 pounds per hour from all stacks serving equipment used in drying salt or sodium sulfate.

D. The owner or operator of existing potash, salt or sodium sulfate processing equipment shall not permit, cause, suffer or allow particulate matter emissions from any equipment not regulated by subsections A, B, or C of 20.2.19.109 NMAC to exceed the allowable rates specified within Table 1.

(1) Interpolation of rates not specified within the table shall be accomplished by use of the equation: E = 0.045 times q raised to the power 0.62, where E is the allowable emission rate expressed in pounds per hour and q is the stack volumetric flow rate expressed in dry cubic feet per minute adjusted to standard conditions.

(2) Table 1 - Allowable Particulate Emission Rates for Specific Stack Volumetric Flow Rates:

Volumetric Flow Rate (dscfm) Allowable Emission Rate (lb/hr) 1,000 or less 3.3 2,000 5.0 4,000 7.7 6,000 9.9 8,000 11.8 10,000 13.6 20,000 20.9 30,000 26.9 40,000 32.1 50,000 36.9 60,000 41.3 70,000 or greater 45.4

Volumetric Flow Rate

(dscfm)

Allowable Emission Rate

(lb/hr)

1,000 or less

3.3

2,000

5.0

4,000

7.7

6,000

9.9

8,000

11.8

10,000

13.6

20,000

20.9

30,000

26.9

40,000

32.1

50,000

36.9

60,000

41.3

70,000 or greater

45.4

[11/30/95; 20.2.19.109 NMAC - Rn, 20 NMAC 2.19.109 10/31/02]