404 - 1

(Adopted May 7, 1976)(Amended October 5, 1979)

(Amended February 7, 1986)

RULE 404. PARTICULATE MATTER - CONCENTRATION

(a) A person shall not discharge into the atmosphere from any source, particulate

matter in excess of the concentration at standard conditions, shown in Table

404(a).

Where the volume discharged is between figures listed in the Table, the exact

concentration permitted to be discharged shall be determined by linear

interpolation.

The provisions of this subsection shall not apply to any equipment completed and 

put into service before July 1, 1976 in the Palo Verde and Joshua Tree areas.

Before July 1, 1983, liquid sulfur compounds shall not be included as particulate

matter discharged from petroleum coke calciners.

(b) A person shall not discharge into the atmosphere from any source, particulate

matter in excess of 450 milligrams per cubic meter (0.196 grain per cubic foot) in 

discharged gas calculated as dry gas at standard conditions.

The provisions of this subsection shall apply only to any equipment completed and 

put into service before July 1, 1976 in the Palo Verde and Joshua Tree areas.

(c) The provisions of this rule shall not apply to emissions resulting from the

combustion of liquid or gaseous fuels in steam generators or gas turbines.

(d) For the purposes of this rule, emissions shall be averaged over one complete cycle 

of operation or one hour, whichever is the lesser time period.

(e) The provisions of this rule shall not apply to the use of equipment which complies 

with the emission limits specified in Rule 1112.1.

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
Rule 404 (Cont.) (Amended February 7, 1986)

404 - 2

TABLE 404(a)

Volume Discharged

Calculated as Dry Gas

At Standard Conditions

Maximum Concentration

of Particulate Matter”Allowed 

in Discharged Gas Calculated 

as Dry Gas at Standard

Conditions

Volume Discharged

Calculated as Dry Gas

At Standard Conditions

Maximum Concentration

of Particulate Matter

Allowed in Discharged

Gas Calculated as Dry Gas at

Standard Conditions

Cubic meters

Per Minute

Cubic feet

Per Minute

Milligrams per

Cubic Meter

Grains per

Cubic Foot

Cubic meters

Per Minute

Cubic feet

Per Minute

Milligrams per

Cubic Meter

Grains per

Cubic Foot

25 or

less

883 or

less

450 0.196 900 31780 118 0.0515

30 1059 420 .183 1000 35310 113 .0493

35 1236 397 .173 1100 38850 109 .0476

40 1413 377 .165 1200 42380 106 .0463

45 1589 361 .158 1300 45910 102 .0445

50 1766 347 .152 1400 49440 100 .0437

60 2119 324 .141 1500 52970 97 .0424

70 2472 306 .134 1750 61800 92 .0402

80 2825 291 .127 2000 70630 87 .0380

90 3178 279 .122 2250 79460 83 .0362

100 3531 267 .117 2500 88290 80 .0349

125 4414 246 .107 3000 105900 75 .0327

150 5297 230 .100 4000 141300 67 .0293

175 6180 217 .0947 5000 176600 62 .0271

200 7063 206 .0900 6000 211900 58 .0253

250 8829 190 .0830 8000 282500 52 .0227

300 10590 177 .0773 10000 353100 48 .0210

350 12360 167 .0730 15000 529700 41 .0179

400 14130 159 .0694 20000 706300 37 .0162

450 15890 152 .0664 25000 882900 34 .0148

500 17660 146 .0637 30000 1059000 32 .0140

600 21190 137 .0598 40000 1413000 28 .0122

700 24720 129 .0563 50000 1766000 26 .0114

800 28250 123 .0537 70000

or more

2472000

or more

23 .0100