SDAPCD RULE X-A GENERAL PROVISIONS          
LAST REVISED 11/03/92

          
          REGULATION X.    STANDARDS OF PERFORMANCE FOR NEW
                           STATIONARY SOURCES (NSPS)


           SUBPART A  -  General Provisions   (Delegation Effective 11-8-76:
                                                 Rev. Effective 11-3-92)


                RULE 260.1.   APPLICABILITY   (Rev. Effective 11-3-92)

                (a)   The provisions of this regulation apply to the owner or
           operator of any stationary source which contains an affected 
           facility the construction, reconstruction, or modification of which 
           is commenced after the date of publication in the Code of Federal 
           Regulations 40 CFR Part 60, of any standard (or, if earlier, the 
           date of publication of any proposed standard) applicable to such 
           facility.  Federal delegation of the implementation and enforcement 
           of the standards for such type of source to the Air Pollution 
           Control District of San Diego County must also have been 
           accomplished.  Any such stationary source must also comply with 
           other regulations of the Air Pollution Control District of San 
           Diego County as well as this Regulation X.

                (b)   Any new or revised provisions of this regulation shall 
           apply to the owner or operator of any stationary source which 
           contains an affected facility, the construction or modification of 
           which is commenced after the date of publication in the Code of 
           Federal Regulations 40 CFR Part 60, of such new or revised 
           provision (or, if earlier, the date of publication of any proposed 
           provision) applicable to that facility.

                The U.S. Environmental Protection Agency (EPA) retains 
           concurrent enforcement authority for these standards pursuant to 
           Section 113 of the Act, as amended, if the EPA Administrator 
           desires to exercise it.


                RULE 260.2.   DEFINITIONS   (Rev. Effective 11-3-92)

                Terms used in this regulation shall have the following 
           meanings or, for terms not herein defined, the meaning given them 
           in Regulation I of the Air Pollution Control District of San Diego 
           County or in the Act:

                (a)   "Act" means the Clean Air Act (42 U.S.C. 1857 et seq., 
           as amended by Public Law 91-604, 84 Stat. 1676) and Public Law 
           95-95.

                (b)   "Administrator" means the Administrator of the 
           Environmental Protection Agency or his authorized representative.

                (c)   "Affected Facility" means, with reference to a 
           stationary source, any apparatus to which a standard is applicable.

                (d)   "Alternative Method" means any method of sampling and
           analyzing for an air pollutant which is not a reference or 
           equivalent method but which has been demonstrated to the 
           Administrator's satisfaction to, in specific cases, produce results 
           adequate for his determination of compliance.

                (e)   "Capital Expenditure" means an expenditure for a 
           physical or operational change to an existing facility which 
           exceeds the product of the applicable "annual asset guideline 
           repair allowance percentage" specified in the latest edition of 
           Internal Revenue Service Publication 534 and the existing 
           facility's basis, as defined by Section 1012 of the Internal 
           Revenue Code.  However, the total expenditure for a physical or 
           operational change to an existing facility must not be reduced by 
           any "excluded additions" as defined in IRS Publication 534, as 
           would be done for tax purposes.

                (f)   "Commenced" means, with respect to the definition of 
           "new source" in Section 111 (a)(2) of the Act, that an owner or 
           operator has undertaken a continuous program of construction, 
           reconstruction, or modification or that an owner or operator has 
           entered into a contractual obligation to undertake and complete, 
           within a reasonable time, a continuous program of construction, 
           reconstruction, or modification.

                (g)   "Construction" means fabrication, erection, or 
           installation of an affected facility.

                (h)   "Continuous Monitoring System" means the total 
           equipment, required under the emission monitoring sections in 
           applicable subparts, used to sample and condition (if applicable), 
           to analyze, and to provide a permanent record of emissions or 
           process parameters.

                (i)   "Equivalent Method" means any method of sampling and
           analyzing for an air pollutant which has been demonstrated to the
           Administrator's satisfaction to have a consistent and 
           quantitatively known relationship to the reference method, under 
           specified conditions.

                (j)   "Excess Emissions and Monitoring Systems Performance 
           Report" is a report that must be submitted periodically by a source 
           in order to provide data on its compliance with stated emission 
           limits and operating parameters, and on the performance of its 
           monitoring systems.

                (k)   "Existing Facility" means, with reference to a 
           stationary source, any apparatus of the type for which a standard 
           is promulgated in this regulation, and the construction, 
           reconstruction, or modification of which was commenced before the 
           date of proposal of that standard in  the Federal Register; or any 
           apparatus which could be altered in such a way as to be of that 
           type.

                (l)   [Reserved]

                (m)   "Isokinetic Sampling" means sampling in which the linear
           velocity of the gas entering the sampling nozzle is equal to that 
           of the undisturbed gas stream at the sample point.
                
                (n)   "Malfunction" means any sudden and unavoidable failure 
           of air pollution control equipment or process equipment or of a 
           process to operate in a normal or usual manner.  Failures that are 
           caused entirely or in part by poor maintenance, careless operation, 
           or any other preventable upset condition or preventable equipment 
           breakdown shall not be considered malfunctions.

                (o)   "Modification" means any physical change in, or change 
           in the method of operation of, an existing facility which increases 
           the amount of any air pollutant (to which a standard applies) 
           emitted into the atmosphere by that facility or which results in 
           the emission of any air pollutant (to which a standard applies) 
           into the atmosphere not previously emitted.

                (p)   "Monitoring Device" means the total equipment, required
           under the monitoring of operations rules in applicable subparts, 
           used to measure and record (if applicable) process parameters.

                (q)   "Nitrogen Oxides" means all oxides of nitrogen except
           nitrous oxide, as measured by test methods set forth in this
           regulation.

                (r)   "One-Hour Period", with respect to continuous monitoring
           systems, means any 60-minute period commencing on the hour.

                (s)   "Opacity" means the degree to which emissions reduce the
           transmission of light and obscure the view of an object in the
           background.

                (t)   "Owner or Operator" means any person who owns, leases,
           operates, controls, or supervises an affected facility or a 
           stationary source of which an affected facility is a part.

                (u)   "Particulate Matter" means any finely divided solid or
           liquid material, other than uncombined water, as measured by the
           referenced methods specified under each applicable subpart, or an
           equivalent or alternative method.

                (v)   "Proportional Sampling" means sampling at a rate that
           produces a constant ratio of sampling rate to stack gas flow rate.

                (w)   "Reference Method" means any method of sampling and
           analyzing for an air pollutant as described in Appendix A to 40 CFR
           Part 60.

                (x)   "Run" means the net period of time during which an 
           emission sample is collected. Unless otherwise specified, a run may 
           be either intermittent or continuous within the limits of good 
           engineering practice.

                (y)   "Shutdown" means the cessation of operation of an 
           affected facility for any purpose.

                (z)   "Six-Minute Period" means any one of the 10 equal parts 
           of a one-hour period.

                (aa)  "Standard" means a standard of performance promulgated 
           under this regulation.

                (bb)  "Startup" means the setting in operation of an affected
           facility for any purpose.

                (cc)  "Stationary Source" means any building, structure, 
           facility, or installation which emits or may emit any air 
           pollutant.


                RULE 260.3.    ABBREVIATIONS

                The abbreviations used in this regulation have the following
           meanings:

           ASTM       -    American Society for Testing and Materials
           Btu        -    British thermal unit
           oC         -    degree Celsius (centigrade)
           cal        -    calorie
           CdS        -    cadmium sulfide
           cfm        -    cubic feet per minute
           CO         -    carbon monoxide
           CO2        -    carbon dioxide
           dscm       -    dry cubic meter(s) at standard conditions
           dscf       -    dry cubic feet at standard conditions
           eq         -    equivalents
           oF         -    degree Fahrenheit
           g          -    gram(s)
           gal        -    gallon(s)
           g-eq       -    gram equivalents
           gr         -    grain(s)
           hr         -    hour(s)
           HCl        -    hydrochloric acid
           Hg         -    mercury
           H2O        -    water
           H2S        -    hydrogen sulfide
           H2SO4      -    sulfuric acid
           in         -    inch(s)
           oK         -    degree Kelvin
           k          -    1,000
           kg         -    kilogram(s)
           l          -    liter(s)
           lpm        -    liter(s) per minute
           lb         -    pound(s)
           m          -    meter(s)
           meq        -    milliequivalent(s)
           min        -    minute(s)
           mg         -    milligram(s)
           ml         -    milliters(s)
           mm         -    millimeter(s)
           mol. wt.   -    molecular weight
           mV         -    millivolt
           N2         -    nitrogen
           nm         -    nanometer(s) - 10-9 meter
           NO         -    nitric oxide
           NO2        -    nitrogen dioxide
           Nox        -    nitrogen oxides
           O2         -    oxygen
           ppb        -    parts per billion
           ppm        -    parts per million
           psia       -    pounds per square inch absolute
           oR         -    degree Rankine
           std        -    at standard conditions
           sec        -    second
           SO2        -    sulfur dioxide
           SO3        -    sulfur trioxide
           ęg3        -    microgram(s) - 10-6 gram


               RULE 260.4.    DELEGATION   (Rev. Effective 1-13-87)

               (a)  Section 111(c) of the Clean Air Act, as amended,
          directs the Administrator of the Environmental Protection Agency
          to delegate, when appropriate, to each State (on behalf of the
          Air Pollution Control Districts, in the case of California) the
          authority to implement and enforce standards of performance for
          new stationary sources in such State.

               (b)  This Regulation X implements such delegation to the Air
          Pollution Control District of San Diego County for those new
          stationary sources which are anticipated for this County.

               (c)  The Federal Regulations for implementation and
          enforcement of those standards are contained in Part 60, Chapter
          I, Title 40, Code of Federal Regulations (40 CFR Part 60).  The
          applicable portions of 40 CFR Part 60 have been adopted in this
          Regulation X and 40 CFR Part 60 section numbers have been adapted
          to Regulation X rule numbers by the addition of the number 200 to
          each 40 CFR Part 60 section number.

               (d)  All appendices to 40 CFR Part 60, and those sections of
          40 CFR Part 60 concerned with the specific monitoring and test
          requirements for each new stationary source of this regulation,
          are incorporated herein by reference.  The following
          substitutions shall be made for the indicated words or numbers,
          wherever appearing in 40 CFR Part 60 appendices or sections, when
          these appendices or sections are being used as parts of this
          Regulation X.

                    (1)  "Control Officer" for "Administrator", except
               where the Administrator retains sole authority for approving
               alternative or equivalent test methods and alternative
               standards/work practices.

                    (2)  "Regulation" for "Part".

                    (3)  "Rule" for "Section" and for "".

                    (4)  Rule numbers for section numbers by adding 200 to
               the section numbers.

                    (e)  40 CFR Part 60 changes published in the Federal
               Register through May 13, 1976 are incorporated as required
               in this publication, or change, of Regulation X.


               RULE 260.5.    DETERMINATION OF CONSTRUCTION OR
                              MODIFICATION

               (a)  When requested to do so by an owner or operator, the
          Control Officer will make a determination of whether action taken
          or intended to be taken by such owner or operator constitutes
          construction (including reconstruction) or modification or the
          commencement thereof within the meaning of this regulation.

               (b)  The Control Officer will respond to any request for a
          determination under Section (a) of this rule within 30 days of
          receipt of sufficient information to evaluate an application.


               RULE 260.6.    REVIEW OF PLANS

               (a)  When requested to do so by an owner or operator, the
          Control Officer will review plans for construction or
          modification for the purpose of providing technical advice to the
          owner or operator relative to the adequacy of the proposed air
          pollution control measures.

               (b)  (1)   A separate request shall be submitted for each
               construction or modification project.

                    (2)  Each request shall identify the location of such
               project, and be accompanied by technical information
               describing the proposed nature, size, design, and method of
               operation of each affected facility involved in such
               project, including information on any equipment to be used
               for measurement or control of emissions.

               (c)  Neither a request for plans review nor advise furnished
          by the Control Officer in response to such request shall (1)
          relieve an owner or operator of legal responsibility for compli-
          ance with any provision of this regulation or any other
          applicable State or local requirement, or (2) prevent the Control
          Officer from implementing or enforcing any provision of this
          regulation.


               RULE 260.7.    NOTIFICATION AND RECORDKEEPING
                                        (Rev. Effective 11-3-92)

               (a)  Any owner or operator subject to the provisions of this
          regulation shall furnish the Control Officer written notification
          as follows:

                    (1)  A notification of the date construction (or
               reconstruction as defined under Rule 260.15) of an affected
               facility is commenced postmarked no later than 30 days after
               such date.  This requirement shall not apply in the case of
               mass produced facilities which are purchased in completed
               form.

                    (2)  A notification of the anticipated date of initial
               startup of an affected facility postmarked not more than 60
               days nor less than 30 days prior to such date.

                    (3)  A notification of the actual date of initial
               startup of an affected facility postmarked within 15 days
               after such date.

                    (4)  A notification of any physical or operational
               change to an existing facility which may increase the
               emission rate of any air pollutant to which a standard
               applies, unless that change is specifically exempted under
               an applicable subpart or in Rule 260.14(e).  This notice
               shall be postmarked 60 days or as soon as practical, but not
               less than 15 days, before the change is commenced and shall
               include information describing the precise nature of the
               change, present and proposed emission control systems,
               productive capacity of the facility before and after the
               change, and the expected completion date of the change.  The
               Control Officer may request additional relevant information
               subsequent to this notice.  In no case shall such physical
               or operational change be commenced until the Control Officer
               has issued authorization under Regulation I, Rule 10.

                    (5)  A notification of the date upon which
               demonstration of the continuous monitoring system
               performance commences in accordance with Rule 216.13(c).
               Notification shall be postmarked not less than 30 days prior
               to such date.
                    
                    (6)  A notification of the anticipated date for
               conducting the opacity observations required by Rule
               260.11(e)(1) of this regulation.  The notification shall
               also include, if appropriate a request for the Control
               Officer to provide a visible emissions reader during a
               performance test.  The notification shall be postmarked not
               less than 30 days prior to such date.

                    (7)  A notification that continuous opacity monitoring
               system data results will be used to determine compliance
               with the applicable opacity standard during a performance
               test required by Rule 260.8 in lieu of Method 9 observation
               data as allowed by Rule  260.11(e)(5) of this Regulation.
               This notification shall be postmarked not less than 30 days
               prior to the date of the performance test.

               (b)  Any owner or operator subject to the provisions of this
          regulation shall maintain records of the occurrence and duration
          of any startup, shutdown or malfunction in the operation of an
          affected facility; any malfunction of the air pollution control
          equipment; or any periods during which a continuous monitoring
          system or monitoring device is inoperative.

               (c)  Each owner or operator required to install a continuous
          monitoring system (CMS) or monitoring device shall submit  an
          excess emissions and monitoring systems performance report (as
          defined in applicable subparts) and/or a summary report form (see
          Section (d) of this rule) to the Control Officer semiannually,
          except when: more frequent reporting is specifically required by
          an applicable subpart; or the CMS data are to be used directly
          for compliance determination, in which case quarterly reports
          shall be submitted; or the Control Officer, on a case-by-case
          basis, determines that more frequent reporting is necessary to
          accurately assess the compliance status of the source.  All
          reports shall be postmarked by the 30th day following the end of
          each calendar half (or quarter, as appropriate).  Written reports
          of excess emissions shall include the following information:

                    (1)  The magnitude of excess emissions computed in
               accordance with Rule 260.13(h), any conversion factor(s)
               used, and the date and time of commencement and completion
               of each time period of excess emissions and the process
               operating time during the reporting period.

                    (2)  Specific identification of each period of excess
               emissions that occurs during startups, shutdowns, and
               malfunctions of the affected facility.  The nature and cause
               of any malfunction (if known), the corrective action taken
               or preventative measures adopted.

                    (3)  The date and time identifying each period during
               which the continuous monitoring system was inoperative
               except for zero and span checks and the nature of the system
               repairs or adjustments.

                    (4)  When no excess emissions have occurred or the
               continuous monitoring system(s) have not been inoperative,
               repaired, or adjusted, such information shall be stated in
               the report.

               (d)  The summary report form shall contain the information
          and be in the format shown in Figure 1 unless otherwise specified
          by the Control Officer.  One summary report form shall be
          submitted for each pollutant monitored at each affected facility.

                    (1)  If the total duration of excess emissions for the
               reporting period is less than one percent of the total
               operating time for the reporting period and CMS downtime for
               the reporting period is less than five percent of the total
               operating time for the reporting period, only the summary
               report form shall be submitted and the excess emission
               report described in Section (c) above need not be submitted
               unless requested by the Control Officer.

                    (2)  If the total duration of excess emissions for the
               reporting period is one percent or greater of the total
               operating time for the reporting period or the total CMS
               downtime for the reporting period is five percent or greater
               of the total operating time for the reporting period, the
               summary report form and the excess emission report described
               in Section (c) above shall both be submitted.

               (e)  Any owner or operator subject to the provisions of this
          regulation shall maintain a file of all measurements, including
          continuous monitoring system, monitoring device, and performance
          testing measurements; all continuous monitoring system
          performance evaluations; all continuous monitoring system or
          monitoring device calibration checks; adjustments and maintenance
          performed on these systems or devices; and all other information
          required by this regulation recorded in a permanent form suitable
          for inspection.  The file shall be retained for at least two
          years following the date of such measurements, maintenance,
          reports, and records.

               (f)  If notification substantially similar to that in
          Section(a) of this rule is required by any other State or local
          agency, sending the Control Officer a copy of that notification
          will satisfy the requirements of Section (a) of this rule.

               (g)  Individual subparts of this Regulation may include
          specific provisions which clarify or make inapplicable the
          provisions set forth in this rule.


                              Rule 260.7(d)   (Figure 1)


            FOR A FAX COPY OF THIS FIGURE ENTITLED "SUMMARY REPORT - GASEOUS 
            AND OPACITY EXCESS EMISSION AND MONITORING SYSTEM PERFORMANCE,
            PLEASE CONTACT THE DISTRICT.


               RULE 260.8.    PERFORMANCE TESTS

               (a)  Within 60 days after achieving the maximum production
          rate at which the affected facility will be operated, but not
          later than 180 days after initial startup of such facility and at
          such other times as may be required by the Control Officer, the
          owner or operator of such facility shall conduct performance
          test(s) and furnish the Control Officer a written report of the
          results of such performance test(s).  The Control Officer may, at
          his option, conduct the required performance test(s).

               (b)  Performance tests shall be conducted and data reduced
          in accordance with the test methods and procedures contained in
          each applicable subpart unless; (1) the Control Officer specifies
          or approves, in specific cases, the use of a reference method
          with minor changes in methodology, (2) the Administrator approves
          the use of an equivalent method, (3) the Administrator approves
          the use of an alternative method the results of which he has
          determined to be adequate for indicating whether a specific
          source is in compliance, or (4) the Control Officer waives the
          requirement for performance tests because the owner or operator
          of a source has demonstrated by other means to the Control
          Officer's satisfaction that the affected facility is in
          compliance with the standard.

               (c)  Performance tests shall be conducted under such
          conditions as the Control Officer shall specify to the plant
          operator based on representative performance of the affected
          facility.  The owner or operator shall make available to the
          Control Officer such records as may be necessary to determine the
          conditions of the performance tests.  Operations during periods
          of startup, shutdown, and malfunction shall not constitute
          representative conditions of performance tests unless otherwise
          specified in the applicable standard.

               (d)  The owner or operator of an affected facility shall
          provide the Control Officer 30 days prior notice of the
          performance test to afford the Control Officer the opportunity to
          have an observer present.

               (e)  The owner or operator of an affected facility shall
          provide, or cause to be provided, performance testing facilities
          as follows:

                    (1)  Sampling ports adequate for test methods
               applicable to such facility.

                    (2)  Safe sampling platform(s).

                    (3)  Safe access to sampling platform(s).

                    (4)  Utilities for sampling and testing equipment.

               (f)  Each performance test shall consist of three separate
          runs using the applicable test method.  Each run shall be
          conducted for the time and under the conditions as specified in
          the applicable standard.  For the purpose of determining
          compliance with an applicable standard, the arithmetic means of
          results of the three runs shall apply.  In the event that a
          sample is accidentally lost or conditions occur in which one of
          the three runs must be discontinued because of forced shutdown,
          failure of an irreplaceable portion of the sample train, extreme
          meteorological conditions, or other circumstances, beyond the
          owner or operator's control, compliance may, upon the Control
          Officer's approval, be determined using the arithmetic means of
          the results of the two other runs.


               RULE 260.9.      [Reserved]


               RULE 260.10.    [Reserved]


               RULE 260.11.   COMPLIANCE WITH STANDARDS AND MAINTE-
                              NANCE REQUIREMENTS   (Rev. Effective: 3/27/90)

               (a)  Compliance with standards in this regulation, other
          than opacity standards, shall be determined only by performance
          tests established by Rule 260.8, unless otherwise specified in
          the applicable standard.

               (b)  Compliance with opacity standards in this regulation
          shall be determined by conducting observations in accordance with
          Reference Method 9 in Appendix A of 40 CFR Part 60, any
          alternative method that is approved by the Administrator, or as
          provided in Subsection (e)(5) of this rule.  For purposes of
          determining initial compliance, the minimum total time of
          observations shall be 3 hours (30 6-minute averages) for the
          performance test or other set of observations (meaning those
          fugitive-type emission sources subject only to an opacity
          standard).

               (c)  [Reserved]

               (d)  At all times, including periods of startup, shutdown,
          and malfunction, owners and operators shall, to the extent
          practicable, maintain and operate any affected facility including
          associated air pollution control equipment in a manner consistent
          with good air pollution control practice for minimizing
          emissions.  Determination of whether acceptable operating and
          maintenance procedures are being used will be based on
          information available to the Control Officer which may include,
          but is not limited to, monitoring results, opacity observations,
          review of operating and maintenance procedures, and inspection of
          the source.

               (e)  (1)  For the purpose of demonstrating initial
               compliance, opacity observations shall be conducted
               concurrently with the initial performance test required in
               Rule 260.8 unless one of the following conditions apply.  If
               no performance test under Rule 260.8 is required, then
               opacity observations shall be conducted within 60 days after
               achieving the maximum production rate at which the affected
               facility will be operated but no later than 180 days after
               initial startup of the facility.  If visibility or other
               conditions prevent the opacity observations from being
               conducted concurrently with the initial performance test
               required under Rule 260.8, the source owner or operator
               shall reschedule the opacity observations as soon after the
               initial performance test as possible, but not later than 30
               days thereafter, and shall advise the Control Officer of the
               rescheduled date.  In these cases, the 30-day prior
               notification to the Control Officer required in Rule
               260.7(a)(6) shall be waived.  The rescheduled opacity
               observations shall be conducted (to the extent possible)
               under the same operating conditions that existed during the
               initial performance test conducted under Rule 260.8.  The
               visible emissions observer shall determine whether
               visibility or other conditions prevent the opacity
               observations from being made concurrently with the initial
               performance test in accordance with procedures contained in
               Reference Method 9 Appendix B to 40 CFR Part 60.  Opacity
               readings of portions of plumes which contain condensed,
               uncombined water vapor shall not be used for purposes of
               determining compliance with opacity standards.  The owner or
               operator of an affected facility shall make available, upon
               request by the Control Officer, such records as may be
               necessary to determine the conditions under which the visual
               observations were made and shall provide evidence indicating
               proof of current visible observer emission certification.
               Except as provided in Subsection (e)(5) of this rule, the
               results of continuous monitoring by transmissometer which
               indicate that the opacity at the time visual observations
               were made was not in excess of the standard are probative
               but not conclusive evidence of the actual opacity of an
               emission, provided that the source shall meet the burden of
               proving that the instrument used meets (at the time of the
               alleged violation) Performance Specification 1 in Appendix B
               of 40 CFR Part 60, has been properly maintained and (at the
               time of the alleged violation) that the resulting data have
               not been tampered with in any way.  (Rev. Effective 3/27/90)

                    (2)  Except as provided in Subsection (e)(3) of this
               rule, the owner or operator of an affected facility to which
               an opacity standard in this regulation applies shall conduct
               opacity observations in accordance with Section (b) of this
               rule, shall record the opacity of emissions, and shall
               report to the Control Officer the opacity results along with
               the results of the initial  performance test required under
               Rule 260.8.  The inability of an owner or operator to secure
               a visible emissions observer shall not be considered a
               reason for not conducting the opacity observations
               concurrent with the initial performance test.

                    (3)  The owner or operator of an affected facility to
               which an opacity standard in this regulation applies may
               request the Control Officer to determine and to record the
               opacity of emissions from the affected facility during the
               initial performance test and at such times as may be
               required.  The owner or operator of the affected facility
               shall report the opacity results.  Any request to the
               Control Officer to determine and to record the  opacity of
               emissions from an affected facility shall be included in the
               notification required in Rule 260.7 (a)(6).  If for some
               reason, the Control Officer cannot determine and record the
               opacity of emissions from the affected facility during the
               performance test, then the provisions of Subsection (e)(1)
               of this rule shall apply.

                    (4)  An owner or operator of an affected facility using
               a continuous opacity monitor (transmissometer) shall record
               the monitoring data produced during the initial performance
               test required by Rule 260.8 and shall furnish the Control
               Officer a written report of the monitoring results along
               with Method 9 and Rule 260.8 performance test results.

                    (5)  An owner or operator of an affected facility
               subject to an opacity standard may submit, for compliance
               purposes, continuous opacity monitoring system (COMS) data
               results produced during any performance test required under
               Rule 260.8 in lieu of Method 9 observation data.  If an
               owner or operator elects to submit COMS data for compliance
               with the opacity standard, he shall request approval from
               the Control Officer of that decision, in writing, at least
               30 days before any performance test required under Rule
               260.8 is conducted.  Once the owner or operator of an
               affected facility has been granted approval by the Control
               Officer, the COMS data results will be used to determine
               opacity compliance during subsequent tests required under
               Rule 260.8 until the owner or operator notifies the Control
               Officer, in writing, to the contrary, or unless the Control
               Officer determines that Method 9 data shall be used instead
               of COMS data.  For the purpose of determining compliance
               with the opacity standard during a performance test required
               under Rule 260.8 using COMS data, the minimum total time of
               COMS data collection shall be averages of all 6-minute
               continuous periods within the duration of the mass emission
               performance test.  Results of the COMS opacity
               determinations shall be submitted along with the results of
               the performance test required under Rule 260.8.  The owner
               or operator of an affected facility using a COMS for
               compliance  purposes is responsible for demonstrating that
               the COMS meets the requirements specified in Rule 260.13(c)
               of this subpart, that the COMS has been properly maintained
               and operated, and that the resulting data have not been
               altered in any way.  If COMS data results are submitted for
               compliance with the opacity standard for a period of time
               during which Method 9 data indicates noncompliance, the
               Method 9 data will be used to determine opacity compliance.

                    (6)  Upon receipt from an owner or operator of the
               written reports of the results of the performance tests
               required by Rule 260.8, the opacity observation results and
               observer certification required by Rule 260.11(e)(1), and
               the COMS results, if applicable, the Control Officer will
               make a finding concerning compliance with opacity and other
               applicable standards.  If COMS data results are used to
               comply with an opacity standard, only those results are
               required to be submitted along with the performance test
               results required by Rule 260.8.  If the Control Officer
               finds that an affected facility is in compliance with all
               applicable standards for which performance tests are con-
               ducted in accordance with Rule 260.8 of this regulation but
               during the time such performance tests are being conducted
               fails to meet any applicable opacity standard, he shall
               notify the owner or operator and advise him that he may
               petition the Administrator within 10 days of receipt of
               notification to make appropriate adjustment to the opacity
               standard for the affected facility.

                    (7)  The Administrator will grant such a petition upon
               a demonstration by the owner or operator that the affected
               facility and associated air pollution control equipment was
               operated and maintained in a manner to minimize the opacity
               of emissions during the performance tests; that the
               performance tests were performed under the conditions
               established by the Control Officer; and that the affected
               facility and associated air pollution control equipment were
               incapable of being adjusted or operated to meet the
               applicable opacity standard.

                    (8)  The Administrator will establish an opacity
               standard for the affected facility meeting the above
               requirements at a level at which the source will be able, as
               indicated by the performance and opacity tests, to meet the
               opacity standard at all times during which the source is
               meeting the mass or concentration emission standard.  In no
               case shall the adjusted opacity standard be less stringent
               than the standards of Regulation IV, Rule 50.


               RULE 260.12.    [Reserved]


               RULE 260.13.    MONITORING REQUIREMENTS  (Rev. Effective:
                                                          3/27/90)

               (a)  Unless otherwise approved by the Control Officer or
          specified in applicable subparts, the requirements of this rule
          shall apply to all continuous monitoring systems required under
          applicable subparts.

               (b)  All continuous monitoring systems and monitoring
          devices shall be installed and operational prior to conducting
          performance tests under Rule 260.8.  Verification of operational
          status shall, as a minimum, consist of the following:

                    (1)  For continuous monitoring systems referenced in
               Subsection (c)(1) of this rule, completion of the
               conditioning period specified by applicable requirements in
               Appendix B to 40 CFR Part 60.

                    (2)  For continuous monitoring systems referenced in
               Subsection (c)(2) of this rule, completion of seven days of
               operation.

                    (3)  For monitoring devices referenced in applicable
               subparts, completion of the manufacturer's written
               requirements or recommendations for checking the operation
               or calibration of the device.

               (c)  If the owner or operator of an affected facility elects
          to submit continous opacity monitoring system (COMS) data for
          compliance with the opacity standard as provided under Rule 
          260.11(e)(5), he shall conduct a perfomance evaluation of the
          COMS as specified in Performance Specification 1, Appendix B of
          40 CFR Part 60 before the performance test required under Rule
          260.8 is conducted.  Otherwise, the owner or operator of an
          affected facility shall conduct a performance evaluation of the
          COMS or continous emission monitoring system (CEMS) during any
          performance test required under Rule 260.8 or within 30 days
          thereafter in accordance with the applicable performance
          specification in Appendix B of 40 CFR Part 60, the owner or
          operator of an affected facility shall conduct COMS or CEMS
          performance evaluations at such other times as may be required by
          the Control Officer under Section 114 of the Act.

                    (1)  The owner or operator of an affected facility
               using a COMS to determine opacity compliance during any
               performance test required under Rule 260.8 and as described
               in Rule 260.11(e)(5) shall furnish the Control Officer two
               or, upon request, more copies of a written report of the
               results of the COMS performance evaluation described in
               Section (c) of this rule at least 10 days before the
               performance test required under Rule 260.8 is conducted.

                    (2)  Except as provided in Subsection (c)(1) of this
               rule, the owner or operator of an affected facility shall
               furnish the Control Officer within 60 days of completion two
               or, upon request, more copies of a written report of the
               results of the performance evaluation.

               (d)  Owners or operators of all continuous monitoring
          systems installed in accordance with the provisions of this
          regulation shall check the zero and span drift at least once
          daily in accordance with the method prescribed by the manufac-
          turer of such systems unless the manufacturer recommends
          adjustments at shorter intervals, in which case such
          recommendations shall be followed.  The zero and span shall, as a
          minimum, be adjusted whenever the 24-hour zero drift or 24-hour
          calibration drift limits of the applicable performance
          specifications in Appendix B to 40 CFR Part 60 are exceeded.  For
          continuous monitoring systems measuring opacity of emissions, the
          optical surfaces exposed to the effluent gases shall be cleaned
          prior to performing the zero or span drift adjustments except
          that for systems using automatic zero adjustments, the optical
          surfaces shall be cleaned when the cumulative automatic zero
          compensation exceeds four percent opacity.  Unless otherwise
          approved by the Control Officer, the following procedures, as
          applicable, shall be followed:

                    (1)  For extractive continuous monitoring systems
               measuring gases, minimum procedures shall include
               introducing applicable zero and span gas mixtures into the
               measurement system as near the probe as is practical.  Span
               and zero gases certified by their manufacturer to be
               traceable to National Bureau of Standards reference gases
               shall be used whenever these reference gases are available.
               The span and zero gas mixtures shall be the same composition
               as specified in Appendix B to 40 CFR Part 60.  Every six
               months from date of manufacture, span and zero gases shall
               be reanalyzed by conducting triplicate analyses with
               Reference Methods 6 for SO2, 7 for NOx, and 3 for O2 and
               CO2, respectively.  The gases may be analyzed at less
               frequent intervals if longer shelf lives are guaranteed by
               the manufacturer.

                    (2)  For non-extractive continuous monitoring systems
               measuring gases, minimum procedures shall include upscale
               check(s) using a certified calibration gas cell or test cell
               which is functionally equivalent to a known gas
               concentration.  The zero check may be performed by computing
               the zero value from upscale measurements or by mechanically
               producing a zero condition.

                    (3)  For continuous monitoring systems measuring
               opacity of emissions, minimum procedures shall include a
               method for producing a simulated zero opacity condition and
               an upscale (span) opacity condition using a certified
               neutral density filter or other related technique to produce
               a known obscuration of the light beam.  Such  procedures
               shall provide a system check of the analyzer internal
               optical surfaces and all electronic circuitry including the
               lamp and photodetector assembly.

               (e)  Except for system breakdowns, repairs, calibration
          checks, and zero and span adjustments required under Section (d)
          of this rule, all continuous monitoring systems shall be in
          continuous operation and shall meet minimum frequency of
          operation requirements as follows:

                    (1)  All continuous monitoring systems referenced by
               Subsections (c)(1) and (2) of this rule for measuring
               opacity of emissions shall complete a minimum of one cycle
               of operation (sampling, analyzing, and data recording) for
               each successive 10-second period.

                    (2)  All continuous monitoring systems referenced by
               Subsection (c)(1) of this rule for measuring oxides of
               nitrogen, sulfur dioxide, carbon dioxide, or oxygen shall
               complete a minimum of one cycle of operation (sampling,
               analyzing, and data recording) for each successive 15-minute
               period.

                    (3)  All continuous monitoring systems referenced by
               Subsection (c)(2) of this rule, except opacity, shall
               complete a minimum of one cycle of operation (sampling,
               analyzing, and data recording) for each successive one-hour
               period.

               (f)  All continuous monitoring systems or monitoring devices
          shall be installed such that representative measurements of
          emissions or process parameters from the affected facility are
          obtained.  Additional procedures for location of continuous
          monitoring systems contained in the applicable Performance
          Specifications of Appendix B to 40 CFR Part 60 shall be used.

               (g)  When the effluents from a single affected facility or
          two or more affected facilities subject to the same emission
          standards are combined before being released to the atmosphere,
          the owner or operator may install applicable continuous
          monitoring systems on each effluent or on the combined effluent.
          When the affected facilities are not subject to the same emission
          standards, separate continuous monitoring systems shall be
          installed on each effluent.  When the effluent from one affected
          facility is released to the atmosphere through more than one
          point, the owner or operator shall install applicable continuous
          monitoring systems on each separate effluent unless the
          installation of fewer systems is approved by the Control Officer.

               (h)  Owners or operators of all continuous monitoring
          systems for measurement of opacity shall reduce all data to six-
          minute averages and for systems other than opacity to one-hour
          averages for time periods under Rule 260.2(x) and (r)
          respectively.  Six-minute opacity averages shall be calculated
          from 24 or more data points equally spaced over  each six-minute
          period.  For systems other than opacity, one-hour averages shall
          be computed from four or more data points equally spaced over
          each one-hour period.  Data recorded during periods of system
          breakdowns, repairs, calibration checks, and zero and span
          adjustments shall not be included in the data averages computed
          under this section.  An arithmetic or integrated average of all
          data may be used.  The data output of all continuous monitoring
          systems may be recorded in reduced or nonreduced form (e.g., ppm
          pollutant and percent 02 or lb/million Btu of pollutant).  All
          excess emissions shall be converted into units of the standard
          using the applicable conversion procedures specified in subparts.
          After conversion into units of the standard, the data may be
          rounded to the same number of significant digits used in subparts
          to specify the applicable standard (e.g., rounded to the nearest
          one percent opacity).

               (i)  Upon written application by an owner or operator, the
          Administrator may approve alternatives to any monitoring
          procedures or requirements of this regulation including, but not
          limited to the following: (Rev. Effect. 1/13/87)

                    (1)  Alternative monitoring requirements when
               installation of a continuous monitoring system or monitoring
               device specified by this regulation would not provide
               accurate measurements due to liquid water or other
               interferences caused by substances with the effluent gases.

                    (2)  Alternative monitoring requirements when the
               affected facility is infrequently operated.

                    (3)  Alternative monitoring requirements to accommodate
               continuous monitoring systems that require additional
               measurements to correct for stack moisture conditions.

                    (4)  Alternative locations for installing continuous
               monitoring systems or monitoring devices when the owner or
               operator can demonstrate that installation at alternate
               locations will enable accurate and representative
               measurements.

                    (5)  Alternative methods of converting pollutant
               concentration measurements to units of the standards.

                    (6)  Alternative procedures for performing daily checks
               of zero and span drift that do not involve use of span gases
               or test cells.

                    (7)  Alternatives to the ASTM test methods or sampling
               procedures specified by any subpart.

                    (8)  Alternative continuous monitoring systems that do
               not meet the design or performance requirements in
               Performance Specification 1, Appendix B to 40 CFR Part 60,
               but adequately demonstrate a definite and consistent
               relationship between its measurements and the measurements
               of opacity by a system complying with the requirements in
               Performance Specification 1.  The Control Officer may
               require that such demonstration be performed for each
               affected facility.

                    (9)  Alternative monitoring requirements when the
               effluent from a single affected facility or the combined
               effluent from two or more affected facilities are released
               to the atmosphere through more than one point.

               (j)  An alternative to the Relative Accuracy (RA) test
          specified in Performance Specification 2 of Appendix B of 40 CFR
          Part 60 may be requested as follows:  (Rev. Effect. 3/27/90)

                    (1)  An alternative to the reference method tests for
               determining relative accuracy is available for sources with
               emission rates demonstrated to be less than 50 percent of
               the applicable standard.  A source owner or operator may
               petition the Administrator to waive the relative accuracy
               test in Section 7 of Performance Specification 2 and
               substitute the procedures in Section 10 if the results of a
               performance test conducted according to the requirements in
               Rule 260.8 of this Regulation or other tests performed
               following the criteria in Rule 260.8 demonstrate that the
               emission rate of the pollutant of interest in the units of
               the applicable standard is less than 50 percent of the
               applicable standard.  For sources subject to standards
               expressed as control efficiency levels, as source owner or
               operator may petition the Administrator to waive the
               relative accuracy test and substitute the procedures in
               Section 10 pf Performance Specification 2 if the control
               device exhaust emission rate is less than 50 percent of the
               level needed to meet the control efficiency requirement.
               The alternative procedures do not apply if the continuous
               emission monitoring system is used to determine compliance
               continuously with the applicable standard.  The petition to
               waive the relative accuracy test shall include a detailed
               description of the procedures to be applied.  Included shall
               be location and procedure for conducting the alternative,
               the concentration or response levels of the alternative RA
               materials, and the other equipment checks included in the
               alternative procedure.  The Administrator will review the
               petition for completeness and applicability.  The
               determination to grant a waiver will depend on the intended
               use of the CEMS data (e.g., data collection purposes other
               than NSPS) and may require specifications more stringent
               than in Performance Specification 2 (e.g., the applicable
               emission limit is more stringent than NSPS).

                    (2)  The waiver of a CEMS relative accuracy test will
               be reviewed and may be rescinded at such time following
               successful completion of the alternative RA procedure  that
               the CEMS data indicate the source emissions approaching the
               level of the applicable standard.  The criterion for
               reviewing the waiver is the collection of CEMS data showing
               that emissions have exceeded 70 percent of the applicable
               standard for seven consecutive, averaging periods as
               specified by the applicable rule(s).  For sources subject to
               standards expressed as control efficiency levels, the
               criterion for reviewing the waiver is the collection of CEMS
               data showing that exhaust emissions have exceeded 70 percent
               of the level needed to meet the control efficiency
               requirement for seven, consecutive, averaging periods as
               specified by the applicable rule(s), (e.g., Part 60, Chapter
               I, Title 40, Code of Federal Regulations, Sections
               60.45(g)(2) and (3), 60.73(e) and 60.84(e)).  It is the
               responsibility of the source operator to maintain records
               and determine the level of emissions relative to the
               criterion on the waiver of relative accuracy testing.  If
               this criterion is exceeded, the owner or operator must
               notify the Control Officer and the Administrator within 10
               days of such occurrence and include a description of the
               nature and cause of the increasing emissions.  The
               Administrator and/or the Control Officer will review the
               notification and either may rescind the waiver and require
               the owner or operator to conduct a relative accuracy test of
               the CEMS as specified in Section 7 of Performance
               Specification 2.


               RULE 260.14.    MODIFICATION   (Rev. Effective 8-7-80)

               (a)  Except as provided under Sections (e) and (f) of this
          rule, any physical or operational change to the existing facility
          which results in an increase in the emission rate to the
          atmosphere of any pollutant to which a standard applies shall be
          considered a modification within the meaning of Section 111 of
          the Act.  Upon modification, an existing facility shall become an
          affected facility for each pollutant to which a standard applies
          and for which there is an increase in the emission rate to the
          atmosphere.

               (b)  Emission rate shall be expressed as kg/hr of any
          pollutant discharged into the atmosphere for which a standard is
          applicable.  The Control Officer shall use the following to
          determine emission rate:

                    (1)  Emission factors as specified in the latest issue
               of "Compilation of Air Pollutant Emission Factors," EPA
               Publication No. AP-42, or other emission factors determined
               by the Control Officer to be superior to AP-42 emission
               factors, in cases where utilization of emission factors
               demonstrate that the emission level resulting from the
               physical or operational change will either clearly increase
               or clearly not increase.

                    (2)  Material balances, continuous monitor data, or
               manual emission tests in cases where utilization of emission
               factors as referenced in Subsection (b)(1) of this rule does
               not demonstrate to the Control Officer's satisfaction
               whether the emission level resulting from the physical or
               operational change will either clearly increase or clearly
               not increase, or where an owner or operator demonstrates to
               the Control Officer's satisfaction that there are reasonable
               grounds to dispute the result obtained by the Control
               Officer utilizing emission factors as referenced in
               Subsection (b)(1) of this rule.  When the emission rate is
               based on results from manual emission tests or continuous
               monitoring systems, the procedures specified in Appendix C
               to 40 CFR Part 60 shall be used to determine whether an
               increase in emission rate has occurred.  Tests shall be
               conducted under such conditions as the Control Officer shall
               specify to the owner or operator based on representative
               performance of the facility.  At least three valid test runs
               must be conducted before and at least three after the
               physical or operational change.  All operating parameters
               which may affect emissions must be held constant to the
               maximum feasible degree for all test runs.

               (c)  The addition of an affected facility to a stationary
          source as an expansion to that source or as a replacement for an
          existing facility shall not by itself bring within the
          applicability of this regulation any other facility within that
          source.

               (d)  [Reserved]

               (e)  The following shall not, by themselves, be considered
          modifications under this rule:

                    (1)  Maintenance, repair, and replacement which the
               Control Officer determines to be routine for a source
               category, subject to the provisions of Section (c) of this
               rule and Rule 260.15.

                    (2)  An increase in production rate of an existing
               facility, if that increase can be accomplished without a
               capital expenditure on that facility.

                    (3)  An increase in the hours of operation.

                    (4)  Use of an alternative fuel or raw material if,
               prior to the date any standard under this regulation becomes
               applicable to that source type, as provided by Rule 260.1,
               the existing facility was designed to accommodate that
               alternative use.  A facility shall be considered to be
               designed to accommodate an alternative fuel or raw material
               if that use could be accomplished under the facility's
               construction specifications, as amended, prior to the
               change.  For the purposes of Regulation X, conversion to
               coal required for energy consideration, as specified in
               Section 111 (a)(8) of the Act, shall not be  considered a
               modification.

                    (5)  The addition or use of any system or device whose
               primary function is the reduction of air pollutants, except
               when an emission control system is removed or is replaced by
               a system which the Control Officer determines to be less
               environmentally beneficial.

                    (6)  The relocation or change in ownership of an
               existing facility.

               (f)  Special provisions set forth under an applicable
          subpart of this regulation shall supersede any conflicting
          provisions of this rule.

               (g)  Within 180 days of the completion of any physical or
          operational change subject to the control measures specified in
          Section (a) of this rule, compliance with all applicable
          standards must be achieved.


               RULE 260.15.    RECONSTRUCTION

               (a)  An existing facility, upon reconstruction, becomes an
          affected facility irrespective of any change in emission rate.

               (b)  "Reconstruction" means the replacement of components of
          an existing facility to such an extent that:

                    (1)  The fixed capital cost of the new components
               exceeds 50 percent of the fixed capital cost that would be
               required to construct a comparable entirely new facility,
               and

                    (2)  It is technologically and economically feasible to
               meet the applicable standards set forth in this regulation.

               (c)  "Fixed Capital Cost" means the capital needed to
          provide all the depreciable components.

               (d)  If an owner or operator of an existing facility
          proposes to replace components, and the fixed capital cost of the
          new components exceeds 50 percent of the fixed capital cost that
          would be required to construct a comparable entirely new
          facility, he shall notify the Control Officer of the proposed
          replacements.  The notice must be postmarked 60 days (or as soon
          as practicable) before construction of the replacements is
          commenced and must include the following information:

                    (1)  Name and address of the owner or operator.

                    (2)  The location of the existing facility.

                    (3)  A brief description of the existing facility and
               the components which are to be replaced.

                    (4)  A description of the existing air pollution
               control equipment and the proposed air pollution control
               equipment.

                    (5)  An estimate of the fixed capital cost of the
               replacements and of constructing a comparable entirely new
               facility.

                    (6)  The estimated life of the existing facility after
               the replacements.

                    (7)  A discussion of any economic or technical
               limitations the facility may have in complying with the
               applicable standards of performance after the proposed
               replacements.

               (e)  The Control Officer will determine, within 30 days of
          the receipt of the notice required by Section (d) of this rule
          and any additional information he may reasonably require, whether
          the proposed replacement constitutes reconstruction.

               (f)  The Control Officer's determination under Section (e)
          shall be based on:

                    (1)  The fixed capital cost of the replacements in
               comparison to the fixed capital cost that would be required
               to construct a comparable entirely new facility.

                    (2)  The estimated life of the facility after the
               replacements compared to the life of a comparable entirely
               new facility.

                    (3)  The extent to which the components being replaced
               cause or contribute to the emissions from the facility; and

                    (4)  Any economic or technical limitations on
               compliance with applicable standards of performance which
               are inherent in the proposed replacements.

               (g)  Individual subparts of this regulation may include
          specific provisions which refine and delimit the concept of
          reconstruction set forth in this rule.