U.S. DEPARTMENT OF COMMERCE
                                 National Technical Information Service
                                 PB-296 680
Air  Pollution  Regulations in
State  Implementation  Plans
California,  Nevada  County

Abcor, Inc, Wilmington, MA  Walden Div
Prepared for

Environmental  Protection  Agency, Research Triangle Park, NC
Programs Development Div
Aug 78
                                                    Control

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                                         PB 296680
               United States
               Environmental Protection
               Agency
Office of Air Quality
Planning and Standards
Research Triangle Park NC 27711
EPA-U50/3-78-05U-23
August IS/8
               Air
                Air Pollution Regulations
                in State  Implementation
                Plans:
                California
                Nevada County
'
                                         lfu J j
                      REPRODUCED BY
                      NATIONAL TECHNICAL }

                      INFORMATION SERVICE t
                       U. S. DEPARTMENT OF COMMERCE  '•
                        SPRINGFIELD, VA. 22161

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                                   TECHNICAL REPORT DATA
                           (Please read Imttructions on the reverse before completing)
1. REPORT NO.
  EPA-450/3-78-054-23
z
4. TITLE AND SUBTITLE
 Air Pollution Regulations  in State Implementation
 Plane- California   Nevada  County
7. AUTHOH(S)
                                                           3. REC
                                                                            N-
                                6. REPORT DATE
                                 August 1978
                                                           6. PERFORMING ORGANIZATION CODE
                                                           8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
  Walden Division of Abcor,  Inc.
  Wilmington, Mass.
                                                           10. PROGRAM ELEMENT NO.
                                11. CONTRACT/GRANT NO.


                                  68-02-2890
12. SPONSORING AGENCY NAME AND ADDRESS
                                                           13. TYPE OF REPORT AND PERIOD COVERED
  Control  Programs Development Division
  Office of Air Quality  Planning and Standards
  Office of Air, Noise,  and  Radiation
  Research Triangle Park,  NC 27711	
                                14. SPONSORING AGENCY CODE
15. SUPPLEMENTARY NOTES
  EPA Project Officer:   Bob  Schell, Control Programs  Development Division
16. ABSTRACT
  This document has been  produced in compliance with  Section 110(h)(l) of the  Clean Air
  Act amendments of 1977.   The Federally enforceable  regulations contained  in  the State
  Implementation Plans  (SIPs)  have been compiled  for  all  56 States and territories
  (with the exception of  the Northern Mariana Islands).   They consist of both  the
  Federally approved State and/or local air quality regulations as indicated in  the
  Federal Register and  the Federally promulgated  regulations for the State, as
  indicated in the Federal Register. Regulations  which fall into one of the above
  categories as of January 1,  "1978, have been incorporated.  As mandated by Congress,
  this document will be updated annually.  State  and/or local air quality regulations
  which have not been Federally approved as of January 1, 1978, are not included here;
  omission of these regulations from this document  in no way affects the ability of
  the respective Federal, State, or local agencies  to enforce such regulations.
17.
                                KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
                   b.lDENTIFIERS/OPEN ENDED TERMS  C. COSATI Field/Group
  Air pollution
  Federal Regulations
  Pollution
  State Implementation  Plans
18. DISTRIBUTION STATEMENT

  RELEASE UNLIMITED
                   19. SECURITY CLASS (ThisReport!

                      Unclassified	
                                              20. SECURITY CLASS (TMS page/

                                                Unclassified
21. NO. >


22TPRJCE
EPA Form 2220-1 (S-73)

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                               EPA-450/3-78-054-23
          Pollution  Regulations
in  State Implementation Plans

                  California
              Nevada County
                       by

                Walden Division of Abcor, Inc.
                 Wilmington, Massachusetts
                  Contract No. 68-02-2890
                 EPA Project Officer: Bob Schell
                     Prepared for

            U.S. ENVIRONMENTAL PROTECTION AGENCY
                Office of Air, Noise, and Radiation
             Office of Air Quality Planning and Standards
            Research Triangle Park, North Carolina 27711

                     August 1978

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This report is issued by the Environmental  Protection Agency to
report air pollution regulations of interest to a limited number of
readers.  Copies are available, for a fee, from the National Technical
Information Service, 5285 Port Royal Road,  Springfield, VA 22161.
This report was furnished to the Environmental Protection Agency by
Walden Division of Abcor, Inc., Wilmington, Mass. 01887, in fulfillment
of Contract No. 68-02-2890.  The contents of this report are reproduced
herein as received from Walden Division of Abcor,  Inc. The opinions,
findings, and conclusions expressed are  those of the author and not
necessarily those of the Environmental Protection Agency. Mention of
company or product names is not to be considered as an endorsement
by the Environmental Protection Agency.
                   Publication No. EPA-450/3-78-054-23
                                   n

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                             INTRODUCTION

                                                               »
     This document has been produced in compliance with Section TlO(h)O)
of the Clean Air Act Amendments of 1977.  The Federally enforceable
regulations contained in the State Implementation Plans (SIPs)  have been
compiled for all 56 States and territories (with the exception  of the
Northern Mariana Islands).  They consist of both the Federally  approved
State and/or local air quality regulations as indicated in the  Federal
Register and the Federally promulgated regulations for the State, as
indicated in the Federal Register.  Regulations which fall into one of
the above categories as of January 1, 1978, have been incorporated.  As
mandated by Congress, this document will be updated annually.   State
and/or local air quality regulations which have not been Federally
approved as of January 1, 1978, are not included here; omission of these
regulations from this document in no way affects the ability of the
respective Federal, State, or local agencies to enforce such regulations.

     There have been recent changes in the Federal enforceability of
parking management regulations and indirect source regulations.  The
October, 1977, appropriation bill for EPA prohibited Federal enforcement
of parking management regulations in the absence of specific Federal
authorizing legislation.  Federally promulgated parking management
regulations have, therefore, been suspended indefinitely.  Pursuant to
the 1977 Clean Air Act Amendments, indirect source regulations  may not
be required for the approval of a given SIP.  Consequently, any State
adopted indirect source regulations may be suspended or revoked; State
adopted indirect source regulations contained in an applicable  SIP
are Federally enforceable.  More importantly, EPA may only promulgate
indirect source review regulations which are specific to Federally
funded, operated, or owned facilities or projects.  Therefore,  the
Federally promulgated indirect source regulations appearing in  this
document are not enforceable by EPA except as they relate to Federal
facilities.

     Since State air quality regulations vary widely in their organization,
content, and language, a standardized subject index is utilized in this
document.  Index listings consist of both contaminant and activity oriented
categories to facilitate usage.  For example, for regulations which apply
to copper smelters, one might look under sulfur compounds (50.2), particu-
late matter process weight (50.1.1), or copper smelters (51.15).  Federal
regulations pertaining to a given State immediately follow the  approved
State and local regulations.

     Additionally, a summary sheet of the information included  in each
comprehensive document is presented prior to the regulatory text to
allow one to quickly assess the contents of the document.  Specifically,
the summary sheets contain the date of submittal to EPA of each revision
                                     111

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to the SIP and the date of the Federal Register in which the revision
was either approved or disapproved by EPA.  Finally, a brief description
or reference of the regulation which was submitted is also included.

     This document is not intended to provide a tool for determining
the enforceability of any given regulation.  As stated above, it is
intended to provide a comprehensive compilation of those regulations
which are incorporated directly or by reference into Title 40, Part 52,
of the Code of Federal Regulations.  Consequently, the exclusion of a
Federally approved regulation from this document does not diminish the
enforceability of the regulation.  Similarly, the inclusion of a given
regulation (for example, regulations governing pollutants, such as odors,
for which there is no national ambient air quality standards) in this
document does not, in itself, render the regulation enforceable.
                                     IV

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                           SUMMARY SHEET OF

                    ERA-APPROVED REGULATION CHANGES
                             NEVADA COUNTY
Submittal Date                Approval Date             Description

   6/30/72                      9/22/72              All Regulations
                                                     approved unless
                                                     noted otherwise

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                         DOCUMENTATION OF  CURRENT  ERA-APPROVED
                            STATE AIR POLLUTION  REGULATIONS
                            REVISED STANDARD SUBJECT INDEX
 1.0    DEFINITIONS
 2.0    GENERAL PROVISIONS AND ADMINISTRATIVE PROCEDURES
 3.0    REGISTRATION CERTIFICATES, OPERATING PERMITS  AND APPLICATIONS
 4.0    AIR QUALITY  STANDARDS (PRIMARY AND  SECONDARY)
       4.1    PARTICULATES
       4.2   SULFUR DIOXIDE
       4.3   NITRIC OXIDES
       4.4   HYDROCARBONS
       4.5   CARBON MONOXIDE
       4.6   OXIDANTS
       4.7   OTHERS
 5.0    VARIANCES
 6.0    COMPLIANCE SCHEDULES
 7.0    EQUIPMENT MALFUNCTION AND MAINTENANCE
 8.0    EMERGENCY EPISODES
 9.0    AIR QUALITY  SURVEILLANCE AND SOURCE TESTING
10.0    NEW SOURCE PERFORMANCE STANDARDS
11.0    NATIONAL EMISSIONS STANDARDS FOR  HAZARDOUS AIR POLLUTANTS
12.0    MOTOR VEHICLE EMISSIONS AND  CONTROLS
13.0    RECORD KEEPING AND REPORTING
14.0    PUBLIC AVAILABILITY OF DATA
15.0    LEGAL AUTHORITY AND ENFORCEMENT
16.0    HEARINGS, COMPLAINTS, AND INVESTIGATIONS
17.0    PREVENTION OF SIGNIFICANT DETERIORATION
18.0    AIR QUALITY  MAINTENANCE AREA
19.0  - 49.0
       RESERVED FOR FUTURE EXPANSION OF  COMMON INDEX
50.0    POLLUTANT -  SPECIFIC REGULATIONS
       50.1  PARTICULATES
             50.1.1  PROCESS WEIGHT
             50.1.2  VISIBLE EMISSIONS
             50.1.3  GENERAL
                                              vi

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       50.2   SULFUR COMPOUNDS
       50.3   NITRIC OXIDES
       50.4   HYDROCARBONS
       50.5   CARBON MONOXIDE
       50.6   ODOROUS POLLUTANTS
       50.7   OTHERS (Pb, Hg, etc.)
51.0   SOURCE CATEGORY SPECIFIC REGULATIONS
       51.1   AGRICULTURAL PROCESSES (Includes Grain Handling, Orchard Heaters,
              Rice and Soybean Facilities, Related Topics)
       51.2   C9AL OPERATIONS (includes Cleaning, Preparation, Coal Refuse
              Disposal Areas, Coke Ovens, Charcoal Kilns, Related Topics)
       51.3   CONSTRUCTION (includes Cement Plants, Materials Handling, Topics
              Related to Construction Industry)
       51.4   FERROUS FOUNDRIES (includes Blast Furnaces, Related Topics)
       51.5   FUEL BURNING EQUIPMENT (coal, natural gas, oil) - Particulates
              (includes Fuel Content and Other Related Topics)
       51.6   FUEL BURNING EQUIPMENT (coal, natural gas, oil) - S02 (includes
              Fuel Content and Other Related Topics)
       51.7   FUEL BURNING EQUIPMENT (oil, natural gas, coal) - N02 (includes
              Fuel Content and Other Related Topics)
       51.8   HOT MIX ASPHALT PLANTS
       51.9   INCINERATION
       51.10  NITRIC ACID PLANTS
       51.11  NON-FERROUS SMELTERS (Zn, Cu, etc.) - Sulfur Dioxide
       51.12  NUCLEAR ENERGY FACILITIES (includes Related Topic)
       51.13  OPEN BURNING (includes Forest Management, Forest Fire, Fire
              Fighting Practice, Agricultural Burning and Related Topics)
       51.14  PAPER PULP; WOOD PULP AND KRAFT MILLS (includes Related Topics)
       51.15  PETROLEUM REFINERIES
       51.16  PETROLEUM STORAGE (includes Loading, Unloading, Handling and
              Related Topics)
       51.17  SECONDARY METAL OPERATIONS  (includes Aluminum, Steel and Related
              Topics)
       51.18  SULFURIC ACID PLANTS
       51.19  SULFURIC RECOVERY OPERATIONS
       51.20  WOOD WASTE BURNERS
       51.21  MISCELLANEOUS TOPICS
                                             vi i

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TABLE OF CONTENTS
NEVADA COUNTY REGULATIONS
Revised Standard
Subject Index
(2.0)
(1.0)
(50.1.1)
(15.0)
(2.0)
(2.0)
(3.0)
(3.0)
(3.0)
(3.0)
(2.0)
(3.0)
(2.0)
(3.0)
(2.0)
(16.0)
(9.0)
Page
Section Number Title ..Number
1
2
3
4
5
6
10
11
12
15
16
17
18
19
20
40
41
Title
Definitions
Standard Conditions
Enforcement
Validity
Effective Date
Construction Permit
Required
Registration Required
Exemptions From Permit
and Registration
Standards For Granting
Applications For Building
Permits
Conditional Approval
Denial of Applications
Further Information
Applications Deemed
Denied
Appeals
Hearing Board Fees
Analysis Fees
1
1
3
3
3
4
5
5
5
6
7
7
8
8
8
9
9
          viii

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Revised Standard                                                 Pane
Subject Index          Section Number         Title	      Number
    (13.0)                 42         Technical  Reports,           9
                                      Charges for
    (2.0)                  49         District-Wide Coverage     10
    (50.1.2)               50         Ringelmann Chart           10
    (50.7)                 51         Nuisance                   10
    (50.1)                 52         Particulate Matter         10
    (50.0)                 53         Specific Contaminants      12
    (2.0)                  55         Exceptions                 12
    (51.13)                57         Open Burning               13
    (51.9)                 58         Incinerator Burning        14
    (2.0)                  59         Circumvention              14
    (51.21)                60         Reduction of Animal        14
                                      Matter
    (2.0)                  75         General                    16
    (2.0)                  76         Filing Petitions           16
    (2.0)                  77         Contents of Petitions      16
    (5.0)                  78         Petitions for Variances    17
    (2.0)                  79         Appeal From Denial         18
    (2.0)                  80         Failure to Comply With     18
                                      Rules
    (2.0)                  81         Answers                    18
    (2.0)                  82         Dismissal of Petition      18
    (16.0)                 83         Place of Hearing           18
    (16.0)                 84         Notice of Hearing          18

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Revised Standard                                                 Page
Subject Index          Section Number          Title	    Number

    (2.0)                  85             Evidence                18
    (2.0)                  86             Preliminary Matters      19
    (2.0)                  87             Official Notice         19
    (2.0)                  88             Continuances            19
    (2.0)                  89             Decision                20
    (2.0)                  90             Effective Date of       20
                                          Decision
    (3.0)                  91             Lack of Permit          20
                                    -  x -

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                                ARTICLE 1.   GENERAL  PROVISIONS

(2.0)    Sec.  1      Title

         These rules and regulations shall  be known  as  the  Rules  of  the Air  Pol-
         lution Control  District.

(1.0)    Sec.  2     Definitions

         Except as otherwise specifically provided in these rules and except
         where the context otherwise indicates,  words used  in  these  Rules  are
         used in exactly the same sense as  the same  words are  used in Chapter  2,
         Division 20, of the Health and Safety Code.

         (a)  Agricultural Burning.   "Agricultural  Burning" as  used in this
              section means open outdoor fires used  in  agricultural  operations
              in the growing of crops or raising of  fowls or animals, forest
              management or range improvement.

         (b)  Atmosphere.   "Atmosphere" means the air  that envelops or surrounds
              the earth.  Where air pollutants are emitted  into  a building not
              designed specifically as a piece of air pollution  control equipment,
              such emission into the building shall  be  considered an emission  into
              the atmosphere.

         (c)  Board.   "Board" means the Air Pollution  Control  Board of Air Pollu-
              tion Control District of Nevada County.

         (d)  Combustible Refuse.   "Combustible Refuse" is any  solid or  liquid
              combustible waste material containing carbon  in  a  free or  combined
              state.

         (e)  "Combustion contaminants" are particulate matter discharged into the
              atmosphere from the burning of any kind of material containing car-
              bon in a free or combined state.

         (f)  Condensed Fumes.   "Condensed Fumes" are  minute  solid particles
              generated by the condensation of vapors from solid matter after
              volatilization from the molten state, or may be  generated by sub-
              limation, distillation, calcination, or chemical reaction when
              these processes create air-borne particles.

         (g)  Dusts.   "Dusts" are minute solid particles released into the air
              by natural forces or by mechanical processes  such as crushing,
              grinding, milling, drilling, demolishing, shoveling, conveying,
              covering, bagging, sweeping, etc.

         (h)  Multiple Chamber Incinerator.   "Multiple-Chamber Incinerator" is
              any article, machine, equipment, contrivance, structure, or part
                                              -1-

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     of a structure, used to dispose of combustible refuse by burning,
     consisting of three (3) or more refractory lined combustion  furnaces
     in series, physically separated by refractory walls,  interconnected
     by gas passage ports or ducts and employing adequate  design  parame-
     ters necessary for maximum combustion of the material  to be  burned.
     The refractories shall have a Pyrometrie Cone Equivalent of  at
     least seventeen (17), tested according to the method  described  in
     the American Society for Testing Materials, Method C-24.

(1)  Open Burning.   "Open Burning" is any burning process not involving
     use of a multiple-chamber incinerator.  Open burning  does not in-
     clude fireplaces as normally used in structures.

(j)  Open Outdoor Fire.   "Open Outdoor Fire" as used in this regulation
     means combustion of any combustible rubbish or other  material of
     any type outdoors in the open air not in any enclosure,  where the
     products of combustion are not directed through an approved  type
     incinerator.  "Open outdoor fire" does not Include fireplaces nor-
     mally used in structures.

(k)  Participate Matter.   "Particulate Matter" is any material,  except
     uncombined water, which exists in a finely divided form  as a liquid
     or solid at standard conditions.

(1)  Person.   "Person" means any person, firm, association,  organization,
     partnership, business trust, corporation, company, contractor,  sup-
     plier, installer, user or owner, or any state or local governmental
     agency or public district or any officer or employee  thereof.

(m)  Process Weight Per Hour.   "Process Weight" is 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 the equipment is idle.

(n)  Regulation.   "Regulation" means one of the major sub-divisions of
     the Rules of the Air Pollution Control District of Nevada County.

(o)  Residential (less than four dwelling units) Rubbish.   "Residential
     Rubbish" means rubbish originating from residential uses and in-
     cludes wood, paper, cloth, cardboard, tree trimmings, leaves, lawn
     clippings and dry plants.

(p)  Rules.   "Rule" means a rule of the Air Pollution Control District
                                     -2-

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             of Nevada County.

         (q)  Section.    "Section" means section of the Health and Safety Code of
             the  State of California unless some other statute is specifically
             mentioned.

         (r)  Truckee Area:   All that  area of Nevada County east of the Mountain
             Area.

         (s)  Ventilation Index  as given by U.S. Weather Bureau, Sacramento,
             California:

                    180 or less  - poor           401 - 600 - good
                    181   - 400   - fair           600 +       very good

         (t)  Western Nevada County:    All that area in the County west of the
             Mountains.

         (u)  Process Weight Rate:  "Process Weight' is 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.  Process Weight Rate will be
             derived by  dividing the total process weight by  the number of hours
             in  any complete operation from the beginning of  any given process
             to  the completion  thereof, excluding any time during which the
             equipment is  idle.

(50.1.1) Sec. 3     Standard Conditions

         Standard conditions are a gas  temperature of sixty degrees  (60°) Fahren-
         heit and a  gas pressure of  14.7 pounds  per square inch absolute.  Results
         of all analyses  and tests shall be calculated or reported at this gas
         temperature and  pressure.

(15.0)   Sec. 4     Enforcement

         These  Rules and  Regulations  shall be  enforced by the  Air  Pollution Con-
         trol Officer  under authority of Section  24224  (b), Article  2;  and Sec-
         tions  24260,  24262, Article  4; and all  officers empowered by Section
         24221, Article 2.

(2.0)    Sec.  5     Validity

         If any regulation,  rule,  subdivision,  sentence, clause or phrase of these
         Rules  and Regulations  if for any  reason  held  to be  unconstitutional or
         invalid,  such  decision  shall not  affect  the validity  of the  remaining
         portions of these  Rules and  Regulations.  The Air Pollution  Control
         Board  hereby  declares  that  it  would  have adopted these Rules and Regula-
         tions  and every  regulation,  rule,  subdivision,  sentence,  clause and
                                              -3-

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         phrase thereof irrespective of the fact that any one or more  regulations,
         rules* subdivisions,  sentences, clauses, or phrases  be  declared unconsti-
         tutional  or invalid.

(2.0)    Sec.  6     Effective  Date

         These Rules and Regulations shall  take effect on June 30,  1971.
                                              -4-

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                         ARTICLE 2.   APPLICATION FOR BUILDING PERMIT

(3.0)     Sec.  10    Construction Permit Required

         Before any building permit  may be issued by the  County  or  City for any
         building other than residential,  which  involves  emissions  into the air,
         approval by the Air Pollution Control District must  be  first  obtained.
         No construction or use of any building, article, machine,  equipment,
         etc., which may cause emission of air contaminant  shall  take  place with-
         out approval of the Air Pollution Control  District.

(3.0)     Sec.  11    Registration Required

         Registration of all existing equipment, contrivances, or places  of busi-
         ness  that have burning or send emissions into the  atmosphere  is  required
         by July 31, 1971.   Registration shall be made on forms  provided  by APCD.

(3.0)     Sec.  12    Exemptions From  Permit And Registration

         An authorization to construct, permit to operate,  or registration, shall
         not be required for:

         (a)  Vehicles as defined by the Vehicle Code of  the  State  of  California,
              but not including any  article,  machine, equipment  or  other  con-
              trivance mounted on such vehicle that would otherwise require a
              permit under the provisions  of  these Rules  and  Regulations.

         (b)  Vehicles used to transport passengers or freight.

         (c)  Equipment utilized exclusively  in  connection  with  any structure,
              which structure is designed  for and used exclusively  as  a dwelling
              for not more than four (4) families.

         (d)  The following equipment:

              (1)  Comfort air conditioning or comfort ventilating  systems which
                   are not designed  to remove air contaminants generated  by or
                   released from specific  units  or equipment.

              (2)  Refrigeration units except those used  as,  or  in  conjunction
                   with, air pollution control equipment.
                                              -5-

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              (3)   Piston  type  internal combustion engines.

              (4)   Water cooling  towers and water cooling ponds not used for
                   evaporative  cooling of process water or not used for evapor-
                   ative cooling  of water from barometric jets or from barometric
                   condensers.

              (5)   Equipment used exclusively for steam cleaning.

              (6)   Presses used exclusively for extruding metals, minerals, plas-
                   tics or wood.

              (7)   Residential  incinerators when used for burning of paper or
                   leaves.

         (e)   Space heaters.

         (f)   Equipment for food  preparation.

         (g)   Steam heated by natural gas or LPG or both.

         (h)   Self-propelled mobile construction equipment other than pavement
              burners.

(3.0)     Sec.  15    Standards For Granting Applications For Building Permits

         (a)   The  Air  Pollution Control Officer shall deny authorization to con-
              struct,  or permit to operate or permit to sell or rent, except as
              provided in  Section 16, if the applicant does not show that every
              article, machine, equipment or other contrivance, the use of which
              may  cause the issuance  of air contaminants, or the use of which may.
              eliminate or reduce or  control, the issuance of air contaminants, is
              so designed, controlled, or equipped with such air pollution control
              equipment that  it may be expected to operate without emitting or
              without  causing to  be emitted air contaminants in violation of
              Sections 24242 or 24243, Health and Safety Code, or of these Rules
              and  Regulations.

         (b)   Before authorization to construct or a permit to operate is granted,
              the  Air  Pollution Control Officer may require the applicant to pro-
              vide and maintain such  facilities as are necessary for sampling and
              testing  purposes  in order to secure information that will disclose
              the  nature,  extent, quantity or degree of air contaminants discharged
              into the atmosphere from the article, machine, equipment or other
              contrivance  described in the authorization to construct or permit
              to operate.   In the event of such a requirement, the Air Pollution
              Control  Officer shall notify the applicant in writing of the required
              size number  and location of sampling holes; the size and location of
              the  sampling platform;  the access to the sampling platform; and the
                                              -6-

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              utilities for operating  the  sampling  and  testing equipment.  The
              platform and access  shall  be constructed  in  accordance with the
              General  Industry Safety  Orders  of the State  of  California.

         (c)   In acting upon a Permit  to Operate,  if the Air  Pollution Control
              Officer  finds that the article, machine,  equipment  or other con-
              trivance has been constructed not in  accordance with the Authoriza-
              tion to  Construct, he shall  deny the  Permit  to  Operate.  The Air
              Pollution Control Officer  shall not  accept any  further application
              for Permit to Operate the  article, machine,  equipment or other con-
              trivance so constructed  until he finds that  the article, machine,
              equipment or other contrivance  has been reconstructed in accordance
              with the Authorization to  Construct.

(2.0)    Sec.  16    Conditional Approval

         (a)   The Air  Pollution Control  Officer may issue  an  authorization to con-
              struct or a permit to operate,  subject to conditions which will
              bring the operation of any article,  machine, equipment or other
              contrivance within the standards of  Section  15, in  which case the
              conditions shall be specified in writing. Commencing work under
              such an  authorization to construct,  or operation under such a permit
              to operate, shall be deemed  acceptance of all the conditions so
              specified.  The Air Pollution Control Officer shall  issue an author-
              ization  to construct or  a  permit to  operate  with revised conditions
              upon receipt of a new application, if the applicant demonstrates
              that the article, machine, equipment or other contrivance can oper-
              ate within the standards of  Section  15 under the revised conditions.

         (b)   The Air  Pollution Control  Officer may issue  a permit to sell or rent,
              subject  to conditions which  will bring the operation of any article,
              machine, equipment or other  contrivance within  the  standards of
              Section  15, in which case  the conditions  shall  be specified in writ-
              ing.  Selling or renting under  such  a permit to sell or rent shall
              be deemed acceptance of  all  the conditions so specified.  The Air
              Pollution Control Officer  shall issue a permit  to sell or rent with
              revised  conditions upon  receipt of a new  application, if the appli-
              cant demonstrates that the article,  machine, equipment or other con-
              trivance can operate within  the standards of Section 15 under the
              revised  conditions.

(3.0)    Sec.  17    Denial of Applications

         In the event  of denial of authorization to construct, permit to operate,
         or permit to  sell or rent, the  Air Pollution Control Officer shall notify
         the  applicant in writing of the reasons therefor. Service of this noti-
         fication may  be made in person  or by mail, and such  service may be
         proved by the written acknowledgment of the persons  served.  The Air
         Pollution Control Officer shall not  accept a further application unless
                                              -7-

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         the applicant has  complied with objections  specified  by  the Air  Pollu-
         tion Control  Officer as  his reasons  for denial  of  the authorization  to
         construct,  the permit to operate or  the permit  to  sell or  rent.

(2.0)     Sec. 18    Further Information

         Before acting on an application for  authorization  to  construct,  or per-
         mit to operate, or permit to sell  or rent,  the  Air Pollution  Control
         Officer may require the  applicant to furnish  further  information or
         further plans or specifications.

(3.0)     Sec. 19    Applications  Deemed Denied

         The applicant may, at his option,  deem the  authorization to construct,
         permit to operate, or permit to sell or rent  approved if the  Air Pollu-
         tion Control  Officer fails to act on the application  within thirty (30)
         days after filing, or within thirty  (30) days after applicant furnished
         the further information, plans and specifications  requested by the Air
         Pollution Control  Officer, whichever is later.

(2.0)     Sec. 20    Appeals

         Within ten (10) days after notice by the Air  Pollution Control Officer
         of denial or conditional approval  of an authorization to construct,  per-
         mit to operate, to permit to sell  or rent,  the  applicant may  petition the
         Hearing Board, in  writing, for a public hearing.   The Hearing Board,
         after notice and a public hearing held within thirty  (30)  days after fil-
         ing the petition,  may sustain or reverse the  action of the Air Pollution
         Control Officer; such order may be made subject to specified  conditions.
                                              -8-

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                                      ARTICLE 3.   FEES

(16.0)   Sec.  40    Hearing Board Fees

         (a)  Every applicant or petitioner for variance,  or for the extension,
              revocation or modification of a variance,  or for an appeal  from a
              denial or conditional  approval  of an authorization to construct,
              permit to operate, or permit to sell or rent, except any state or
              local governmental agency or public district, shall pay to  the Clerk
              of the Hearing Board,  on filing, a fee in  the sum of Fifteen Dollars
              ($15.00).

         (b)  Any person requesting  a transcript of the  hearing shall pay the
              cost of such transcript.

         (c)  This Rule shall not apply to petitions filed by the Air Pollution
              Control Officer.

(9.0)    Sec.  41    Analysis Fees

         Whenever the Air Pollution  Control Officer finds  that an analysis of the
         emission from any source is necessary to determine the extent and amount
         of pollutants being discharged into  the atmosphere which cannot  be deter-
         mined by visual observation, he may  order the collection of samples and
         the analysis made by qualified personnel.  The  time required for collect-
         ing samples, making the analysis and preparing  the necessary reports,
         but excluding time required  to going  to and from such premises, shall
         be charged against the owner or operator of said  premises in a reason-
         able sum to be determined by the Air Pollution  Control Officer,  which
         said sum is not to exceed the actual cost of such work.

(13.0)   Sec.  42    Technical Reports, Charges For

         Information, circulars, reports of technical  work, and other reports pre-
         pared by the Air Pollution  Control District,  when supplied to other
         governmental agencies or individuals or groups  requesting copies of the
         same, may be charged for by the District in sum not to exceed the cost
         of preparation and distribution of such documents.  All such monies col-
         lected shall be turned into the general  funds of  the said District.
                                              -9-

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                                  ARTICLE 4.   PROHIBITIONS

(2.0)     Sec.  49    District-Wide Coverage

         Prohibitions, as set forth in this Article,  shall  apply  in  all  portions
         of the Nevada County Air Pollution Control District  unless  otherwise
         stated.

(50.1.2) Sec.  50    Ringelmann Chart

         A person shall not discharge into the atmosphere from any single  source
         or emission whatsoever any air contaminants  for a  period or periods
         aggregating more than three (3) minutes  in any one (1) hour which is:

         (a)  As dark or darker in shade as that  designated as No. 2 on  the
              Ringelmann chart, as published  by the United  States Bureau of
              Mines (except in Truckee Area,  which limit is Ringelmann No. 1),  or

         (b)  Of such opacity as to obscure an observer's view to a  degree equal
              to or greater than does smoke described in Subsection  (a)  of this
              Section.

(50.7)   Sec.  51    Nuisance

         A person shall not discharge from any source whatsoever  such quantities
         of air contaminants or other material which  cause  injury, detriment,
         nuisance or annoyance to any considerable number of persons, or to the
         public, or which endanger the comfort, repose, health or safety of any
         such  persons, or the public, or which cause, or have a natural  tendency
         to cause, injury or damage to business or property.

         Note:  Pursuant to Section 24241 of  Chapter  2, Division  20  of the State
                Health and Safety Code, Section 50 and 51 are effective  as of
                March 3, 1970.

(50.1)   Sec.  52    Particulate Matter

         Except as otherwise provided in Sections 53  and 55,  a person shall not
         discharge into the atmosphere, from  any  source, particulate matter in
         excess of 0.3 grain per cubic foot of gas at standard conditions.

         Sec.  52.1  Process Weight Rate

         A person shall not discharge into the atmosphere from any  source, solid
         particulate matter in excess of the  rate shown in  the following table.

         For the purposes of this rule, solid particulate matter  includes  any
         material which would become solid particulate matter if  cooled  to
         standard conditions.
                                              -10-

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This Section shall become effective on January 1, 1974 for all  sources
which are either in operation, or under construction on June 1, 1972.
This Section shall be effective for all other sources on June 1, 1972.

                    ALLOWABLE RATE OF EMISSION BASED ON
                            PROCESS WEIGHT RATE
Process
Rate
Lb/Hr
100
200
400
600
800
1,000
1,500
2,000
2,500
3,000
3,500
4,000
5,000
6,000
7,000
8,000
9,000
10,000
12,000
Weight
Tons/Hr
0.05
0.10
0.20
0.30
0.40
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.50
3.00
3.50
4.00
4.50
5.00
6.00
Rate of
Emission
Lb/Hr
0.551
0.877
1.40
1.83
2.22
2.58
3.38
4.10
4.76
5.38
5.96
6.52
7.58
8.56
9.49
10.4
11.2
12.0
13.6
Process Weight
Rate
Lb/Hr
16,000
18,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
120,000
140,000
160,000
200,000
1,000,000
2,000,000
6,000,000

Tons/Hr
8.00
9.00
10.
15.
20.
25.
30.
35.
40.
45.
50.
60.
70.
80.
100.
500.
1,000.
3,000.

Rate of
Emission
Lb/Hr
16.5
17.9
19.2
25.2
30.5
35.4
40.0
41.3
42.5
43.6
44.6
46.3
47.8
49.0
51.2
69.0
77.6
92.7

           Interpolation of the data for the process weight rates up to
           30 tons/hr. shall be accomplished by the use of the equation:

                             E = 4.10 P0.67    p< 30 tons/hr.

           and interpolation and extrapolation of the data for process
           weight rates in excess of 30 tons/hr. shall be accomplished
           by use of the equation:

                             E = 55.0 P0-11  - 40  p> 30 tons/hr.

           Where:  E = Emissions in pounds per hour.
                   P = Process weight rate in tons per hour.
                                     -11-

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(50.0)    Sec.  53    Specific Contaminants

         A person shall  not discharge into the atmosphere from any single  source
         of emission whatsoever any one or more of the following  contaminants,  in
         any state or combination thereof, exceeding in concentration  at the  point
         of discharge:

         (a)  Sulphur Compounds calculated as sulphur dioxide (S02)  0.2  percent, by
              volume.

         (b)  Combustion Contaminants:   0.3 grain per cubic  foot  of gas  calculated
              to twelve  percent (12%) of carbon dioxide (003) at  standard  condi-
              tions.  In measuring the combustion contaminants from incinerators
              used to dispose  of combustible refuse by burning, the carbon dioxide
              (C02) produced by combustion of any liquid or  gaseous fuels  shall
              be excluded from the calculation to twelve percent  (12%) of  carbon
              dioxide (C02).

(2.0)    Sec.  55   Exceptions     The provisions of Section 50 do  not apply to:

         (a)  Smoke from fires set by,  or permitted by, any  public officer if such
              fire is set, or  permission given, in the performance of  the  official
              duty of such officer, and such fire, in the opinion of such  officer,
              is necessary.

              (1)  For the purpose of the prevention of a fire hazard  which cannot
                   be abated by any other means, or

              (2)  The instruction of public employees in the methods  of fighting
                   fire.

         (b)  Smoke from fires pursuant to permit on property used for Industrial
              purposes for the purpose of instruction of employees in  methods of
              fighting fire.

         (c)  The use of an orchard or citrus grove heater which  does  not  produce
              unconsumed solid carbonaceous matter at a rate in excess of  one (1)
              gram per minute.

         (d)  The use of other equipment in agricultural operations in the growing
              of crops,  or raising of fowls or animals.

         (e)  Smoke from fires as provided for in Section 57.
                                               -12-

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        (f)   Emission  which  results  from equipment  breakdown.  The  person
             responsible  for such  emission  shall, with  all  practicable  speed,
             initiate  and complete appropriate  action to  correct  the  condition
             causing such emissions  and  reduce  the  frequency  of occurrence of
             such condition.   He shall report such  breakdown  to the Control  Of-
             ficer within twenty-four (24)  hours of such  occurrence.

        (g)   Smoke or  fumes  which  result from acts  of God.

(51.13)  Sec.  57     OPEN  BURNING.

        (a)   Pursuant  to  California  State Law,  open burning will  be prohibited  (if
             a building or more than two (2)  dwelling units) after  December  31,
             1971.

        (b)   No new commercial, industrial, institutional,  governmental agency  op-
             erations, and multiple  residential (if a building of more  than  four
             (4) dwelling units) open burning shall be  permitted  after  the effect-
             ive date  of  this subsection.

        (c)   As to open burning not  banned by subparagraphs (a) and (b) above,  the
             following regulations shall apply:

             (1)  Foothill,  Mountain, and Truckee  Areas:   Open burning  is  pro-
                  hibited on days  when the U.S. Weather Bureau issues a ventilation
                  index of less than 401 in any of the  areas.  In such  event, warn-
                  ing  shall  be issued over local media  by the Air Pollution  Control
                  District.   This  subsection shall  not  apply  to safety  flares,  fires
                  nor  cooking of food for human consumption,  nor  fires  for recrea-
                  tional  purposes, nor to back  fires or other fire  control  methods
                  used for the purpose of controlling an existing wild-fire.

                  (a)   This  subsection shall  not apply  to burning permitted  under
                       Section 55(a).

                  (b)   Agricultural  burning is  permitted, but only on days where the
                       U.S.  Weather Bureau reports the  ventilation index as  more
                       than  401.

                  (c)   All Areas:   Orchard heaters are  permitted  if they do  not
                       emit unconsumed solid carbonaceous matter  of more than one
                       (1) gram per minute.

                       Note:  State Law, after January  1, 1975, will  not
                              permit the use of such excessively  discharging
                              heaters.  State Law prohibits the  sale of such
                              heaters after January 1,  1971.
                                               -13-

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(51.9)   Sec.  58     INCINERATOR BURNING.

        (a)   Except for the burning of residential  rubbish  which  meets  the  require-
             ments Section 57, a person shall  not burn  any  combustible  refuse with-
             in the boundaries of the Nevada County Air Pollution Control District,
             except in a multiple-chamber incinerator as described in Section 2(j)
             or in equipment found by the Air Pollution Control Officer to  be
             equally effective for the purpose of air pollution control.

        (b)   Additional Prohibitions.  The following items  are banned from  being
             burned at any time within the Nevada County Air Pollution  Control
             District unless the burning is performed in equipment meeting  the
             requirements of Section 58:

             (1)  Burning of tires.

             (2)  Rubber products.

             (3)  Car bodies or parts.

             (4)  Demolition material.

(2.0)   Sec.  59     CIRCUMVENTION.

        A person shall not build, erect, install, or use article, machine,  equip-
        ment or other contrivance, the use of which, without resulting  in a reduc-
        tion in the total release of air contaminants to the atmosphere, reduces  or
        conceals an emission which would otherwise constitute a  violation of Divi-
        sion 20, Chapter 2, of the Health and Safety Code of the  State  of Californ-
        ia or of these Rules and Regulations.   This Section shall not apply to
        cases in which the only violation involved is of Section  24243  of the Health
        and Safety Code of the State of California.

(51.21) Sec.  60     REDUCTION OF ANIMAL HATTER.

        A person shall not operate or use any article,  machine,  equipment or other
        contrivance for the reduction of animal matter  unless all gases, vapors and
        gas-entrained effluents from such an article, machine,  equipment or other
        contrivance are:

        (a)   Incinerated at temperatures of not less than twelve  hundred degrees
             Fahrenheit (1200F) for a period of not less than 0.3 second, or

        (b)   Processed in such a manner determined by the Air Pollution Control
             Officer to be equally, or more, effective  for the purpose  of air pol-
             lution control than (a) above.
                                               -14-

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A person incinerating or processing gases, vapors or gas-entrained
effluents pursuant to this rule shall provide, properly install  and
maintain in calibration, in good working order, and in operation,
devices as specified in the Authorization to Construct or Permit to
Operate, or as specified by the Air Pollution Control Officer, or
indicating temperature, pressure of other operating conditions.

For the purpose of this Section, "reduction" is defined as any heated
process, including rendering, cooking, drying, dehydrating, digesting,
evaporating and protein concentrating.

The provisions of this Section shall not apply to any article, machine,
equipment or other contrivance used exclusively for the processing of
food for human consumption.
                                   -15-

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                                                                                         --"•
                                                                                           i
                           ARTICLE 5.  PROCEDURE BEFORE THE HEARING BOARD

(2.0)    Sec.  75     GENERAL

         This  regulation shall  apply  to all  hearings  before  the  Hearing  Board of
         the A1r Pollution Control  District.

(2.0)    Sec.  76     FILING PETITIONS.

         Requests for hearing shall be Initiated by the filing of a petition In trip-
         licate with the Clerk of the Hearing Board,  and the payment of  the fee of
         Fifteen Dollars ($15.00) provided for In Section 40 of  these  Rules and Reg-
         ulations, after service of a copy of the petition has been made on the Air
         Pollution Control Officer, and one copy on the holder of the  permit or var-
         iance, If any, Involved.  Service may be made In person or by mall and ser-
         vice  may be proved by written acknowledgement of the  person served.

(2.0)    Sec.  77     CONTENTS OF PETITIONS.   Every  petition  shall  state:

         (a)  The name, address and telephone number  of the  petitioner,  or other
              person authorized to receive service  of notices;

         (b)  Whether the petitioner  is an individual, co-partnership, or corporation
              or other entity; names  and  addresses  of the partners if  a  co-partner-
              ship; names and addresses of the officers if a corporation; and the
              names and addresses of  the  persons in control, if  other  entity.

         (c)  The type of business or activity involved in the application, and the
              street address  at which it  is conducted;

         (d)  A brief description of  the  article, machine, equipment or  other con-
              trivance, if any, involved  in the application;

         (e)  The section or  rule under which the petition is  filed; that is,
              whether petitioner desires  a hearing:

              (1)  To determine whether a permit shall be revoked or suspended
                   permit reinstated  under Section  24274, Health and Safety Code
                   of the State of California;

              (2)  For a variance under Section 24292, Health  and Safety Code;

              (3)  To revoke  or modify a  variance under Section  24298, Health and
                   Safety Code;

              (4)  To review  the denial or conditional granting  of an  authorization
                   to construct, permit to operate, or permit  to sell  or rent under
                   Sections 15 and 16 of  these Rules  and Regulations.
                                                -16-

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        (f)   Each  petition  shall  be  signed  by  the  petitioner, or by some person on
             his behalf;  and where the  person  signing  is  not the petitioner, it
             shall  set forth his  authority  to  sign,

        (g)   Petitions for  revocation of  permits shall allege* 1n addition, the
             section under  which  permit was granted  and the rule or section which
             is alleged to  have been violated, together with a brief statement of
             the facts constituting  such  alleged violation.

        (h)   Petitions for  reinstatement  of suspended  permits shall allege, in
             addition, the  section under  which the permit was granted; the request
             and alleged refusal  which  formed  the  basis for such suspension, to-.
             gether with a  brief  statement  as  to why information requested, if anyp
             was not furnished; and  whether such information is believed by peti-
             tioner to be pertinent, and, if so, when  it  will be furnished,

        (i)   All petitions  shall  be  typewritten, double spaced, on letter size
             paper, on one  side of the  paper only, leaving a margin of at least
             one inch at the top  and left side of  each sheet.

(5.0)    Sec.  78    PETITIONS FOR  VARIANCES     In addition to the matters required by
                    Section 77, petitions for  variances shall state briefly;

        (a)   The section, rule or order complained of.

        (b)   The facts showing why compliance  with the section, rule, or order is
             unreasonable.

        (c)   For what period of time  the variance is  sought and why,

        (d)   The damage or  harm resulting or which would  result to petitioner from
             a compliance with such  section, rule  or order.

        (e)   The  requirements which  petitioner can meet and the date when  petitioner
             can comply with such requirements.

        (f)   The advantages and disadvantages  to the residents of the district
             resulting from requiring  compliance or  resulting from granting a
             variance.

        (g)   Whether or not operations  under such  variance, if granted, would con-
             stitute a nuisance.

        (h)   Whether or not any case involving the same identical equipment or
             process is pending in any  court,  civil  or criminal.

        (i)   Whether or not the subject equipment  or process is covered by a permit
             to operate issued by the Air Pollution  Control Officer.
                                                -17-

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(2.0)   Sec.  79    APPEAL FROM DENIAL.

        A petition to review a denial  or conditional  approval  of an  authorization
        to construct, permit to operate, or permit to sell  or  rent  shall,  in  ad-
        dition to the matters required by Section 77, set forth a summary  of  the
        application, or a copy thereof; the alleged reasons for the  denial  or con-
        ditional  approval; and the reasons for appeal.

(2.0)   Sec.  80    FAILURE TO COMPLY WITH RULES.

        The clerk of the Hearing Board shall  not  accept for filing any petition
        which does not comply with these Sections relating to  the form, filing
        and service of petitions unless the Chairman or any two of the Hearing
        Board direct otherwise and confirm such direction in writing,   Such di-
        rection need not be made at a meeting of  the Hearing Board,   The Chairman
        or any two members, without a meeting, may require the petitioner  to
        state further facts or reframe a petition so as to disclose  clearly the
        issues Involved.

(2.0)   Sec.  81    ANSWERS.

        Any person may file an answer within ten  (10) days after service.   All
        answers shall be served the same as petitions under Section  76.

(2.0)   Sec.  82    DISMISSAL OF PETITION.

        The petitioner may dismiss his petition at any time before  submission of the
        case to the Hearing Board, without a hearing or meeting of  the Hearing Board.
        The Clerk of the Hearing Board shall  notify all interested  persons of such
        dismissal.

(16.0)  Sec.  83    PLACE OF HEARING.

        All hearings shall be held at Nevada City, the County  seat,  unless some
        other place 1s designated by the Hearing  Board.

(16.0)  Sec.  84    NOTICE OF HEARING.

        The Clerk of the Hearing Board shall mail or deliver a notice of hearing to
        the petitioner, the A1r Pollution Control Officer, the holder of the permit
        or variance involved, if any, and to any person entitled to notice under
        Sections 24275, 24295, 24299, Health and  Safety Code.

(2.0)   Sec.  85    EVIDENCE.

        (a)  Oral evidence shall be taken only on oath or affirmation.
                                               -18-

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        (b)  Each party shall have these rights:  to call and examine witnesses;
             to introduce exhibits; to cross-examine opposing witnesses on any
             matter relevant to the issues even though that matter was not covered
             in the direct examination; to impeach any witness regardless of which
             party first called him to testify; and to rebut the evidence against
             him.  If respondent does not testify in his own behalf, he may be
             called and examined as if under cross-examination.

        (c)  The hearing need not be conducted according to technical rules relat-
             ing to evidence and witnesses.  Any relevant evidence shall be admit-
             ted if it is the sort of evidence on which responsible persons are
             accustomed to rely 1n the conduct of serious affairs, regardless of
             the existence of any common law or statutory rule which might make im-
             proper the admission of such evidence over objection in civil actions.
             Hearsay evidence may be used for the purpose of supplementing of ex-
             plaining any direct evidence* but shall not be sufficient in itself
             to support a finding unless it would be admissible over objection in
             civil actions.  The rules of privilege shall be effective to the same
             extent that they are now, or hereafter may be, recognized in civil
             actions, and irrelevant and unduly repetitious evidence shall be ex-
             cluded.

(2.0)   Sec. 86     PRELIMINARY MATTERS.

             Preliminary matters such as setting a date for hearing, granting
             continuances, approving petitions for filing, allowing amendments,
             and other preliminary rulings not determinative of the merits of the
             case, may be made by the Chairman or any two members of the Hearing
             Board without a hearing or meeting of the Hearing Board and without
             notice.

(2.0)   Sec. 87     OFFICIAL NOTICE.

             The Hearing Board may take official notice of any matter which may
             be judicially noticed by the courts of this State.

(2.0)   Sec. 88     CONTINUANCES.

             The  Chairman or any two members of the Hearing Board shall grant any
             continuance"of fifteen (15) days or less concurred in by petitioner,
             the A1r Pollution Control Officer and by every person who has filed
             an answer In the action, and may be ex parte, without a meeting of the
             Hearing Board and without prior notice.
                                              -19-

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(2.0)   sec. 89     DECISION.

        The decision shall be 1n writing, served and filed within fifteen (15)
        days after submission of the cause by the parties thereto, and shall
        contain a brief statement of facts found to be true, the determination
        of the Issues presented and the order of the Hearing Board.  A copy shall
        be mailed or delivered to the Air Pollution Control Officer, the petitioner
        and to every person who has filed an answer or who has appeared as a
        party 1n person or by counsel at the hearing.

(2.0)   Sec. 90     EFFECTIVE DATE OF DECISION.

        The decision shall become effective fifteen (15) days after delivering or
        mailing a copy of the decision as provided 1n Section 89, or the Hearing
        Board may order that the decision shall  become effective sooner.

(3.0)   Sec.  91     LACK OF PERMIT.

        The Hearing Board shall  not receive or accept a petition for a variance
        for the operation or use of any article, machine, equipment or other
        contrivance until  a permit to operate has been granted or denied by  the
        Air Pollution  Control  Officer; except that an appeal  from a denial of a
        permit to operate and a  petition for a variance may be filed  with the
        Hearing Board  1n a single petition.   A variance granted by the Hearing
        Board,  after a denial  of a permit to operate and a petition for a variance,
        may be filed with the Hearing Board, after a denial  of a permit to operate
        by  the A1r Pollution  Control  Officer, may Include a  permit to operate for
        the duration of the variance.
                                               -20-

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                         AIR  POLLUTION CONTROL

                          DISTRICT BOUNDARIES
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                                                                  NEVADA       COUNTY



                                                                       CALIFORNIA
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