SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

RULE 404 - PARTICULATE MATTER - CONCENTRATION
(Adopted May 7, 1976)(Amended October 5, 1979)(Amended February 7, 1986)

(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.

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