SUBPART C - National Emission Standard for Beryllium 
                      (Delegation Effective 11/8/76)

               RULE 361.30.   APPLICABILITY

               "New Sources" for this subpart are those sources commencing
          construction or modification after December 7, 1971.  The
          provisions of this subpart are applicable to the following
          stationary sources:

               (a)  Extraction plants, ceramic plants, foundries,
          incinerators, and propellant plants which process beryllium ore,
          beryllium, beryllium oxide, beryllium alloys, or beryllium-
          containing waste.

               (b)  Machine shops which process beryllium, beryllium
          oxides, or any alloy when such alloy contains more than 5 percent
          beryllium by weight.

               RULE 361.31.   DEFINITIONS

               Terms used in this subpart are defined in Subpart A of this
          Regulation, or in this rule as follows:

               (a)  "Beryllium" means the element beryllium.  Where weights
          or concentrations are specified, such weights or concentrations
          apply to beryllium only, excluding the weight or concentration of
          any associated elements.

               (b)  "Extraction Plant" means a facility chemically
          processing beryllium ore to beryllium metal, alloy, or oxide, or
          performing any of the intermediate steps in these processes.

               (c)  "Beryllium Ore" means any naturally occurring material
          mined or gathered for its beryllium content.

               (d)  "Machine Shop" means a facility performing cutting,
          grinding, turning, honing, milling, deburring, lapping,
          electrochemical machining, etching, or other similar operations.

               (e)  "Ceramic Plant" means a manufacturing plant producing
          ceramic items.

               (f)  "Foundry" means a facility engaged in the melting or
          casting of beryllium metal or alloy.

               (g)  "Beryllium-Containing Waste" means material
          contaminated with beryllium and/or beryllium compounds used or
          generated during any process or operation performed by a source
          subject to this subpart.

               (h)  "Incinerator" means any furnace used in the process of
          burning waste for the primary purpose of reducing the volume of
          the waste by removing combustible matter.

               (i)  "Propellant" means a fuel and oxidizer physical or
          chemically combined which undergoes combustion to provide rocket

               (j)  "Beryllium Alloy" means any metal to which beryllium
          has been added in order to increase its beryllium content and
          which contains more than 0.1 percent beryllium by weight.

               (k)  "Propellant Plant" means any facility engaged in the
          mixing, casting, or machining of propellant.

               RULE 361.32.   EMISSION STANDARD

               (a)  Emissions to the atmosphere from stationary sources
          subject to the provisions of this subpart shall not exceed 10
          grams of beryllium over a 24-hour period, except
          as provided in Section (b) of this rule.

               (b)  Rather than meet the requirement of Section (a) of this
          rule, an owner or operator may request approval from the Control
          Officer to meet an ambient concentration limit on beryllium in
          the vicinity of the stationary source of 0.01 /m3, averaged over
          a 30-day period.

                    (1)  Approval of such requests may be granted by the
               Control Officer provided that:

                         (i)  At least 3 years of data is available which
                    in the judgement of the Control Officer demonstrates
                    that the future ambient concentrations of beryllium in
                    the vicinity of the stationary source will not exceed
                    0.01 /m3, average over a 30-day period.  Such 3-year
                    period shall be the 3 years ending 30 days before the
                    effective date of this standard.

                         (ii) The owner or operator requests such approval
                    in writing within 30 days after the effective date of
                    this standard.

                         (iii)The owner or operator submits a report to the
                    Control Officer within 45 days after the effective date
                    of this standard which report includes the following

                              (A)  description of sampling method including
                         the method and frequency of calibration;

                              (B)  method of sample analysis;

                              (C)  averaging technique for determining 30-
                         day average concentrations;

                              (D)  number, identity, and location (address,
                         coordinates, or distance and heading from plant)
                         and sampling sites;

                              (E)  ground elevations and height above
                         ground of sampling inlets;

                              (F)  plant and sampling area plots showing
                         emission points and sampling sites.  Topographic
                         features significantly affecting dispersion
                         including plant building heights and locations
                         shall be included;

                              (G)  information necessary for estimating
                         dispersion including stack height, inside
                         diameter, exit gas temperature, exit velocity or
                         flow rate, and beryllium concentration;

                              (H)  a description of data and procedures
                         (methods or models) used to design the air
                         sampling network (i.e., number and location of
                         sampling sites); and

                              (I)  air sampling data indicating beryllium
                         concentrations in the vicinity of the stationary
                         source for the 3-year period specified in
                         Subsection (b)(1) of this rule.  This data shall
                         be presented chronologically and include the
                         beryllium concentration and location of each
                         individual sample taken by the network and the
                         corresponding 30-day average beryllium

                    (2)  Within 60 days after receiving such report, the
               Control Officer will notify the owner or operator in writing
               whether approval is granted or denied.  Prior to denying
               approval to comply with the provisions of Section (b) of
               this rule, the Control Officer will consult with
               representatives of the stationary source for which the
               demonstration report was submitted.

               (c)  The burning of beryllium and/or beryllium-containing
          waste, except propellants, is prohibited except in incinerators,
          emissions from which must comply with the standard.

               RULE 361.33.   STACK SAMPLING

               (a)  Unless a waiver of emission testing is obtained under
          Rule 361.13, each owner or operator required to comply with Rule
          361.32(a) shall test emissions from his source.

                    (1)  Within 90 days of the effective date in the case
               of an existing source or a new source which has an initial
               startup date preceding the effective date; or

                    (2)  Within 90 days of the startup in the case of new
               source which did not have an initial startup date preceding
               the effective date.

               (b)  The Control Officer shall be notified at least 30 days
          prior to an emission test so that he may at his option observe
          the test.

               (c)  Samples shall be taken over such a period or periods as
          are necessary to accurately determine the maximum emissions which
          will occur in any 24-hour period.  Where emissions depend upon
          the relative frequency of operation of different types of
          processes, operating hours, operating capacities, or other
          factors, the calculation of maximum 24-hour period emissions will
          be based on the combination of factors which is likely to occur
          during the subject period and which result in the maximum
          emissions.  No changes in the operation shall be made, which
          would potentially increase emissions above that determined by the
          most recent source test, until a new emission level has been
          estimated by calculation and the results reported to the Control

               (d)  All samples shall be analyzed and beryllium emissions
          shall be determined within 30 days after the source test.  All
          determinations shall be reported to the Control Officer by a
          registered letter dispatched before the close of the next
          business day following such determination.

               (e)  Records of emission test results and other data needed
          to determine total emissions shall be retained at the source and
          made available, for inspection by the Control Officer, for a
          minimum of 2 years.

               RULE 361.34.   AIR SAMPLING

               (a)  Stationary sources subject to Rule 361.32(b) shall
          locate air sampling sites in accordance with a plan approved by
          the Control Officer.  Such sites shall be located in such a
          manner as is calculated to detect maximum concentrations of
          beryllium in the ambient air.

               (b)  All monitoring sites shall be operated continuously
          except for a reasonable time allowance for instrument maintenance
          and calibration, for changing filters, or for replacement of
          equipment needing major repair.

               (c)  Filters shall be analyzed and concentrations calculated
          within 30 days after filters are collected.  Records of
          concentrations at all sampling sites and other data needed to
          determine such concentrations shall be retained at the source and
          made available, for inspection by the Control Officer, for a
          minimum of 2 years.

               (d)  Concentrations measured at all sampling sites shall be
          reported to the Control Officer every 30 days by a registered

               (e)  The Control Officer may at any time require changes in,
          or expansion of, the sampling network.