SACAQMD RULE 4O5 DUST AND CONDENSED FUMES          
LAST REVISED 08/03/77          

          SACRAMENTO METROPOLITAN AQMD                RULES AND REGULATIONS
                                RULE 405 DUST AND CONDENSED FUMES
                                          Adopted 8-1-62
                                     (Amended 6-1-76, 8-3-77)

                                              INDEX

          100 GENERAL
              101  PURPOSE

          200 DEFINITIONS
              201  DUSTS
              202  CONDENSED FUMES
              203  PROCESS WEIGHT PER HOUR

          300 STANDARDS
              301  LIMITATION

          400 ADMINISTRATIVE REQUIREMENTS (NOT INCLUDED)

          500 MONITORING AND RECORDS (NOT INCLUDED)
          
          100 GENERAL

              101  PURPOSE:    To limit the discharge of dust and condensed
                   fumes into the atmosphere by establishing emission rates
                   based on process weight.

          200 DEFINITIONS

              201  DUSTS:   Minute   solid   particles  released  into  the
                   atmosphere by natural forces  or by mechanical processes
                   such   as   crushing,   grinding,   milling,   drilling,
                   demolishing,  shoveling,  conveying, covering,  bagging,
                   sweeping, etc.

              202  CONDENSED FUMES:  Minute solid  particles  generated  by
                   the  condensation  of  vapors  from  solid  matter after
                   volatilization   from  the  molten  state,  or  may   be
                   generated by sublimation,  distillation, calcination, or
                   chemical reaction, when these  processes create airborne
                   particles.

              203  PROCESS  WEIGHT  PER  HOUR:   The total  weight  of  all
                   materials  introduced  into any specific  process  which
                   process  may cause any discharge  into  the  atmosphere.
                   Solid fuels  charged  will  be considered as part of the
                   process  weight,  but  liquid  and   gaseous  fuels  and
                   combustion air will not. The "process  weight  per hour"
                   will be derived by dividing the total process weight  by
                   the  number  of hours in one complete operation from the
                   beginning  of  any   given  process  to  the  completion
                   thereof,  excluding  any  time  during  which  equipment
                   handling such process is idle.

          300 STANDARDS

              301  LIMITATIONS:  A person  shall  not  discharge  into  the
                   atmosphere  in  any  one hour from any source whatsoever
                   dust or condensed fumes in total quantities in excess of
                   the amount shown in the following table:

                   To use the following table,  take the process weight per
                   hour as such is defined below.  Then find this figure on
                   the  table,  opposite  which is the  maximum  number  of
                   kilograms  or  pounds  of  contaminants   which  may  be
                   discharged  into the atmosphere in any one hour.  As  an
                   example, if "A"  has  a  process which emits contaminant
                   into the atmosphere and which  process  takes 3 hours to
                   complete, he will divide the weight of all  materials in
                   the  specific  process,  in  this example, 7500,  by  3,
                   giving a process weight per hour  of  2500 kg. The table
                   shows that "A" may not discharge more than  3.13  kg  in
                   any  hour  during  the process. Where the process weight
                   per hour falls between  figures in the left hand column,
                   the  exact  weight  or  permitted   discharge   may   be
                   interpolated.
          405-3                                              August 3, 1977
          SACRAMENTO METROPOLITAN AQMD                RULES AND REGULATIONS
                         TABLE FOR PROCESS WEIGHT AND ALLOWABLE DISCHARGE



                      Maximum                                    Maximum
                     discharge                                  discharge
      Process           rate            Process                rate allowed
     weight per       allowed          weight per             for the solid
        hour          for the             hour                 particulate
                       solid                                      matter
                    particulate                                (aggregate
                      matter                                    discharged
                    (aggregate                                  from all
                    discharged                                  points of
                      from all                                  discharge)
                     points of
                     discharge)

        kg/hr          kg/hr             kg/hr                    kg/hr
        lb/hr          lb/hr             lb/hr                    lb/hr

         114            .45               3636                    3.95
         250           1.00               8000                    8.70

         136            .51               3864                    4.11
         300           1.12               8500                    9.04

         159            .56               4091                    4.25
         350           1.23               9000                    9.36

         182            .61               4318                    4.40
         400           1.34               9500                    9.67

         205            .65               4545                    4.55
         450           1.44              10000                   10.0

         227            .70               5455                    4.73
         500           1.54              12000                   10.4

         273            .79               6364                    4.91
         600           1.73              14000                   10.8
                  
         318            .86               7273                    5.09
         700           1.90              16000                   11.2

         364            .94               8182                    5.23
         800           2.07              18000                   11.5

         409           1.01               9091                    5.36
         900           2.22              20000                   11.8

         455           1.08              13636                    5.91
        1000           2.38              30000                   13.0

         545           1.21              18182                    6.32
        1200           2.66              40000                   13.9

         636           1.33              22727                    6.68
        1400           2.93              50000                   14.7
      
         727           1.45              27273                    6.95
        1600           3.19              60000                   15.3

         818           1.56              31818                    7.23
        1800           3.43              70000                   15.9
                   
         909           1.66              36364                    7.45
        2000           3.66              80000                   16.4

        1136           1.91              40909                    7.68
        2500           4.21              90000                   16.9

        1364           2.15              45455                    7.86
        3000           4.72             100000                   17.3
                                                           
        1591           2.36              90909                    9.27
        3500           5.19             200000                   20.4

        1818           2.56             136634                   10.23
        4000           5.64             300000                   22.5

        2045           2.76             181818                   10.95
        4500           6.07             400000                   24.1

        2273           2.95             227273                   11.55
        5000           6.49             500000                   25.4
     
        2500           3.13             272727                   12.09
        5500           6.89             600000                   26.6

        2727           3.30             318182                   12.55
        6000           7.27             700000                   27.6

        2955           3.47             363636                   12.91
        6500           7.64             800000                   28.4

        3182           3.64             409091                   13.32
        7000           8.00             900000                   29.3
                                    
        3409           3.80             454545                   13.64
        7500           8.36            1000000                   30.0
                                       
                                       or more
                                       or more