DRAFT SALVADORAN     NSO   13.11.02:07           
STANDARD                             
               
                        
__________________________________________________________________  
 
 
 
 
 
 
 
 
 
ATMOSPHERIC EMISSIONS  
STATIONARY POINT SOURCES.  
                    
 
 
  
 
 
 
 
 
 
                        
__________________________________________________________________  
                       
CORRESPONDENCE:  
 
 
 
 
  ICS  13.040.40                  
                        
______________________________________ ___________________________  
Published by the Consejo Nacional de Ciencia y Tecnología, CONACYT, Colonia 
Médica, Avenida Dr. Emilio Alvarez, Pasaje Dr. Guillermo Rodríguez Pacas, 
No.51, San Salvador, El Salvador, Central America. Telephone: 226 -2800, Fax 
225-6255; e -mail: info@conacyt.gob.sv  
__________________________________________________________________   
  Rights Reserved.  
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  REPORT  
 
The Technical Standards Committees of the Consejo Nacional de Ciencia y Tecnología, [National 
Science and Technology Council]  CONACYT, are the bodies responsible for studying standards. They 
are composed of representatives from Private Enterprise, the Government, the Consumer Protection 
Organisation and University Academia.  
 
In order to ensure a  national and international consen sus, projects prepared by the Committees are subject 
to a period of public consultation, during which anyone may submit observations.  
 
This study was approved as NSO 13.11.02:07 ATMOSPHERIC EMISSIONS. STATIONARY POINT 
SOURCES by Technical Standards Committ ee 11. Formal approval of the standard requires ratification 
by the Board of Directors and the Executive Agreement of the Ministry of the Economy.  
 
This standard is subject to permanent revision to ensure it will be relevant at all times to the needs and 
demands of current techniques. Duly supported requests for its revision will receive the closest attention 
from the Council’s technical body: The Department of Standards, Metrology and Quality Certification.  
 
PARTICIPATING MEMBERS OF COMMITTEE 11  
 
Karen Emi lia Cruz    Ministry of the Environment and Natural Resources  
Alberto Fabian Aguilar    Ministry of the Environment and Natural Resources  
Pablo Arturo Garcia   Ministry of Public Health and Social Welfare  
Jesús Ricardo Andrade    Ministry of the Economy  
Sandra  Peraza de Ramírez   UES/Faculty of Chemistry and Pharmacy  
Oscar Osegueda    José Simeón Cañas University  
Mónica Rodríguez    Nejapa Power  
Claudia Mercedes Rodríguez   Nejapa Power  
Juan Francisco Coto    Hilasal  
Otto Cabrera     Hilasal  
Carlos Francisco Lara    Ingenio La Magdalena  
Ana Graciela de Urrutia    ABECAFE  
Roberto Velásquez Paz    FERTICA  
Milagro de Romero    INQUIFAR  
Wanquiriam Castañeda    Ingenio El Angel  
Johana Flores     CASSA  
Owar Villa     Consumer Ombudsman  
Ana Cecilia Hernández    Industria La Constan cia 
Oscar Renato Cea    CAESA  
Aida Martinez     RASA de CV  
Ana Bravo Atxa    Asociación Azucarera de El Salvador  
Luis Mariano Herrera    Cemento de El Salvador SA  
Miriam Vasquez    Duke Energy Internacional  
Freddy Quintanilla    Aceros de Centroamérica  
Ricardo H uezo     CORINCA  
Fredy Benavides    Grupo Calvo  
Carlos Escobar     ECOTEC/CESSA  
Edwin Romeo Zepeda    Hidrotérmica  
John McCormack    Asociación Nacional de la Empresa Privada  
Yanira Colindres    CONACYT  
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  1. PURPOSE  
This Standard establishes the maximum permissible limits of concentration of polluting 
emissions discharged into the atmosphere, generated by stationary point sources . These 
limits have been established to safeguard health and the environment.  
 
 
2. FIELD OF APPLICATION  
This Standard applies throughout all of  the national territory, in matters concerning the 
prevention and control of atmospheric pollution, in any state of matter , generated by 
emissions from stationary point sources . 
 
 
3.        DEFINITIONS  
 
3.1 New activity:  an industrial, commercial or service installation which, in order to carry 
out its business activity, needs to use stationary point sources  of atmospheric emissions, 
and which, when this Standard comes into force, is in any of the following stages: 
prefeasibility, feasibility or draft.  
 
3.2 Operati ng activity:  an industrial, commercial or service installation with stationary point 
sources  of atmospheric emission, which, when this Standard comes into force, is 
installed, op erating or in the project stage . 
 
Wet base:  The result obtained when the amoun t of the sample taken for analysis includes 
the amount of water contained in it.  
 
3.3 Dry base:  The result obtained when the amount of the sample taken for analysis does not 
include the amount of water contained in it.  
 
3.4 Biomass: energy material obtained direc tly or indirectly from biological resources.  
 
3.5 Boiler:  Any enclosed equipment in which steam is generated. Superheaters, reheaters, 
economisers or other pressure components, connected directly to the boiler, without the 
involvement of valves, will be consid ered part of the boiler.  
 
3.6 Nominal Capacity: The thermal design power of a combustion unit declared by the 
manufacturer.  
 
3.7 Solid fossil fuels:  Petroleum coke and varieties of coal whose fixed carbon content varies 
between 10% and 90% by weight.  
 
3.8 Liquid and gaseous fossil fuels:  Hydrocarbons derived from petroleum and natural gas 
which may have paraffinic, naphthenic, olefinic or aromatic properties in any of their 
combinations.  
 
3.9 Normal pressure and temperature conditions (NPTC):  conditions where the pressure  
is 101.3 kPa (1 atmosphere) and the temperature is 25ºC (77ºF or 298.15 K).  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
    
3.10 Atmospheric pollution:  alteration of the normal composition of the air caused by the 
presence in the atmosphere of one or more substances which have been added directly or 
indir ectly by man or by natural sources in amounts, or of a nature or duration, which are 
sufficient to adversely affect flora and fauna, materials and man himself.  
 
3.11 Atmospheric emissions:  releases or discharges into the atmosphere of particles, gases or 
forms of energy, emanating from a stationary or moving source.  
 
3.12 Indirect heating equipment:  External combustion equipment in which the material for 
heating does not come into direct contact with the combustion gases.  
 
3.13 Stationary sources: buildings, structures or  plant s sited permanently in a single place 
which emit, or can emit, any kind of pollutant.  
 
3.14 Stationary point source : a stationary source whose emissions are discharged into the 
atmosphere via a flue or chimney.  
 
3.15 Maximum permissible  limits:  values or para meters which establish the maximum 
degree of concentration of pollutants which can be discharged or emitted into the 
atmosphere by a stationary point source . 
 
3.16 Full Load Measurement: measurement of the emissions when the source is operating at 
maximum capac ity, irrespective of the production process concerned, subject to the safety 
parameters specified according to the design and construction of the source.  
 
3.17 Opacity:  the degree to which the emissions reduce the transmission of light and darken 
the visibilit y of an object in its surroundings.  
 
3.18 Total suspended particles (TSP):  this group comprises finely divided solid or liquid 
particles, other than steam.  
 
3.19 Emergency plant:  Electricity generating equipment used to compensate for a failure in 
electricity supply  from the local grid, limited to 360 hours/year.  
 
ABBREVIATIONS AND SYMBOLS  
 
ASTM            =   “American S ociety for Testing and Material s”, USA  
 NPTC   = Normal Pressure and Temperature Conditions  
BHP  = Boiler Horsepower  
 LPG   = Liquefied Petroleum Gas  
 TSP  = Total suspended particles  
KPa  = Kilo pascal  
MARN  = Ministry of the Environment and Natural Resources  
mg  = milligram  
 m3  = cubic metre  
 MW  = Megawatt  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   Nm3  = cubic metres at NPTC  
ppm  = parts per million by volume  
 psi  = pounds per square inch  
tm  = tonne   
EPA          =  “Environmental Protection Agency” , (United States of America)  
   
 
5. NPTC EQUIVALENCES  
 CO 1 ppm = 1.15 mg /Nm3 
 NO x 1 ppm = 1.88 mg /Nm3 
 SO 2 1 ppm = 2.62 mg/Nm3 
NH 3 1 ppm = 0.7 mg/Nm3 
HCl 1 ppm = 1.49 mg/Nm3 
 
6. FORMULAS  
 
6.1  Formul a to correct emissions of these gases: NO x, CO , SO 2 and TSP on a dry base and 
 to an O 2 reference:  
 
20.9% - Or 
Er = -------------------  x E m 
    20.9% - Om 
  Where:  
  Er = Emission calculated at the reference value.  
Em = Measured emission of TSP, NO x, CO y  SO 2 on a dry base
 Or = Reference level for O 2. 
  Om = Measured value for O 2. 
 
6.2 Formula to transform wet base emissions to a dry base:  
 
   100 E BH 
EBS = -------------------   
    100 - % H 2O 
 
  Where:  
  EBS   = Emission on a dry base.  
EBH  = Emission on a wet base.  
     % H 2O = Amount of moisture in the gases.  
 
 
6.3 Formula for converting mg/Nm3  to ppm of a gaseous pollutant:  
 
mg/Nm3 = ppm x Molecular Weight of the gas x 0.0409  
 
 
6.4 Energy and power equivalences  
 
 
1 BHP  = 35.3 MJ/h  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  1 kWh  = 3.6 MJ  
 
 
 
7 MAXI MUM PERMISSIBLE LIMITS  
 
The following tables set out the maximum permissible limits for emissions from various 
stationary point sources . 
 
7.1 Petroleum refining. Operation of ovens and boilers  
 
Table 1. Maximum permissible limits for ovens and boilers in petro leum refining  
ACTIVITIES  
Operating  New   
POLLUTANT  
 Symb  UNIT  
Fuel Oil  Refinery 
Gas Fuel Oil  Refinery 
Gas 
Sulphur Dioxide  SO 2 mg/Nm3 3 800  4 800  500 500 
Carbon Monoxide  CO mg/Nm3 Report  Report  Report  Report  
Nitrogen Oxides  NOx  mg/Nm3 1 000  1 000  460 460 
Total suspended particles  TSP mg/Nm3 350 350 50 50 
Carbon Dioxide  CO 2 % by 
volume  Report  Report  Report  Report  
Notes:  
TSP, SO 2, CO, NO x related to a 10% O 2 dry base  
Report %O 2 dry base  
Where mixtures of fuel oil and refinery gas are concerned, t he emission limits of whichever fuel is used in a 
higher proportion will be applied.  
 
7.2 Production of sulphuric acid  
 
Table 2. Maximum permissible limits for the production of sulphuric acid  
ACTIVITIES   
POLLUTANT  
 Symb  UNIT  
Operating  New 
Sulphur Dioxide  SO 2 kg /tm at 100% H 2SO 4  20 13 
Sulphur Trioxide and sulphuric 
acid mists  SO 3 Kg/tm at 100% H 2SO 4  0.6 0.1 
 
Note:  
In the case of SO 3 and sulphuric acid mists, these are expressed as kg of 100% sulphuric acid.  
 
 
 
 
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  7.3 Production of fertilisers  
 
Table 3 . Maximum permissible limits for the production of fertilisers  
ACTIVITIES   
POLLUTANT  
 Symb  UNIT  
Operating  New  
SIMPLE SUPERPHOSPHATES  
kg/tm P 2O5 
produced  0.4 - Fluorine compounds 
expressed as Fluorine  F 
mg/Nm3 - 5 
kg/tm P 2O5 
produced  0.4  - Total Suspended 
Particles  TSP 
 mg/Nm3  250 50 
N-P-K COMPOUNDS  
Ammonia  NH 3 kg/tm of NPK 
produced  0.2 0.01 
Fluorine compounds 
expressed as Fluorine  F kg/tm of NPK 
produced  0.4 0.01 
kg/tm of NPK 
produced  1.0 0.2  
Total Suspended 
Particles  TSP 
mg/Nm3 250 50 
 
7.4 Firetube, watertube and mixed system boilers, and indirect heating equipment using 
fossil or biomass fuels.  
 
The maximum permissible concentration limits established in Table 4 must be complied 
with by all industrial establishments whose normal product ion involves the use of 
firetube, watertube and mixed system boilers with a nominal capacity of 30 BHP or more, 
and/or indirect heating equipment with a nominal capacity of 2 000 MJ/h or more based 
on the higher calorific power of the fuel.  
 
The following types of boilers and indirect heating equipment are exempt from the 
obligation to measure TSP by isokinetic sampling:  
− between 30 BHP and 350 BHP  
− between 2 000 MJ/h and 25 000 MJ/h  
Only measurement of the combustion gases and opacity is required for the ab ove. 
In the case of boilers with a nominal capacity greater than 350 BHP or indirect heating 
equipment with a nominal capacity of 25 000 MJ/h or more, the measurement of the 
particulate matter must be done using the isokinetic sampling method.  
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  Table 4 . Maximum permissible limits in firetube, watertube  
and mixed system boilers and indirect heating equipment  
 
POLLUTANT  
 Symb  UNIT  LPG  DIESEL  BUNKER C  BIOMASS*  
Sulphur Dioxide  SO 2 mg/Nm3 NA 435 23141) -- 
Carbon Dioxide  CO 2 % Report  Report  Report  Report  
Carbon Monoxide  CO mg/Nm3 Report  152 152 Report  
Nitrogen Oxides  NOx  mg/Nm3 201 201 408 Report  
Total Suspended Particles  TSP mg/Nm3 NA 213 213 411 
Opacity   % NA 30 50  50 
Notes:  
1)  referring to a maximum level of 0.03 mass fraction (3% mass ) of sulph ur in the fuel.  
NA= Not applicable  
* These limits apply to equipment which uses biomass as its fuel (for example: rice husks, wood waste, paper, cotton]. 
For equipment using cane bagasse, see Table 6.  
In the case of firetube, watertube and mixed system boi lers which use fossil fuels, TSP, SO 2, CO and NOx must be 
reported in relation to 10% O 2 dry base.  
In the case of indirect heating equipment (irrespective of the fuel used), and boilers whose fuel is biomass, TSP, SO 2, 
CO and NOx must be reported in relat ion to a 10%  O 2 dry base.  
In all cases, report %O 2 dry base.  
 
7.5 Electricity generators with internal combustion engines using Bunker C  
 
The maximum permissible concentration limits established in Table 5 must be complied 
with by all industrial establishment s using electricity generators with internal combustion 
engines whose power is more than 300 kW nominal capacity.  
 
Table 5. Maximum permissible limits for  
electricity generators with internal combustion engines  
ACTIVITIES  
  
POLLUTANT  
 Symb  UNIT  
Operating  New 
Sulphur Dioxide         SO 2 mg/Nm3 3695  3695  
Carbon Monoxide  CO mg/Nm3 Report  Report  
Carbon Dioxide  CO 2 % Report  Report  
Nitrogen Oxides     NOx  mg/Nm3 4342  4249  
Total Suspended Particles  TSP mg/Nm3 647 139 (greater 
than 50 MW)  
 
185 (les s 
than 50 MW)  
Notes:  
TSP, SO 2, CO, NO x related  to a 10% O 2 dry base  
Report %O 2 dry base  
 
 
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
 
7.6 Sugar industry. Operation of watertube boilers using cane bagasse.  
 
Table 6. Maximum permissible limits for watertube boilers  
 in the sugar industry using ca ne bagasse  
ACTIVITIES   
POLLUTANT  
 Symb  UNIT  
Operating  New  
Sulphur Dioxide         SO 2 mg/Nm3 NA NA 
Carbon Dioxide       CO 2 %vol  Report  Report  
Carbon Monoxide    CO mg/Nm3 Report  Report  
Nitrogen Oxides     NOx mg/Nm3 1 000  750 
Total Suspended Part icles  TSP mg/Nm3 1 000  600 
Notes:  
TSP, CO, NOx y SO 2 related to  a 10% O2 dry base  
 Report %O 2 dry base  
 
 
7.7 Coffee industry.  Ovens and boilers using coffee  husks, coffee pulp, wood or mixed  
 
Table 7 .  Maximum permissible limits for ovens and boilers in th e coffee  
 industry using coffee husks, coffee pulp, wood or mixed  
 
ACTIVIDAD  Pollutants  Symbol  UNIT  
Operating  New  
Sulphur Dioxide  SO 2 mg/Nm3 Report  Report  
Carbon Dioxide  CO 2 %vol  Report  Report  
Carbon Monoxide  CO mg/Nm3 Report  Report  
Nitrogen Oxides  NO x mg/Nm3 1 335  410 
Total Suspended Particles  TSP mg/Nm3 400 275 
The reference O 2 will be a 10% dry base  
Note: If this sector is using wood, the values in Table no. 4 for  biomass must be applied  
 
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
7.8 Cement production  
 
            Table 8. Maximum pe rmissible limits for cement production  
 
ACTIVITIES   
POLLUTANT  
 Symb  UNIT  
Operating  New  
Sulphur Dioxide  SO 2 mg/Nm3 600 400 
Carbon Dioxide  CO 2 %vol  Report  Report  
Carbon Monoxide  CO mg/Nm3 Report  Report  
Nitrogen Oxides  NOx mg/Nm3 1 800   600 
Total S uspended Particles  TSP mg/Nm3 150 50 
  Notes:  
TSP, CO, SO 2 and NOx must be reported corrected to a 10% O 2 dry base  
Report  %O 2 dry base.  
 
 
7.9 Thermoelectric power generators with steam and/or exhaust gas turbines  
 
The following equipment is exempt from the obligation to measure TSP by isokinetic 
sampling:  
− between 2 000 MJ/h and 25 000 MJ/h  
For the above equipment, it is only necessary to measure the combustion gases and 
opacity.  
In the case of equipment whose nominal capacity is greater than 25 000 MJ/h, the  
particulate matter must be measured using the isokinetic sampling method.  
 
Table 9. Maximum permissible limits for thermoelectric  
generators with steam and/or exhaust gas turbines  
ACTIVITIES  
Operating   
POLLUTANT  
 Symb  UNIT  
Diesel Oil  Fuel Oil  New  
Sulphur Dioxide         SO 2 mg/Nm3 2 000  3 800  2 000  
Carbon Dioxide       CO 2 % Report  Report  Report  
Carbon Monoxide    CO mg/Nm3 460 460 460 
Nitrogen Oxides     NOx mg/Nm3 460 460 460 
Total Suspended Particles  TSP mg/Nm3 100 350 50 
Opacity   % 50 50 30 
Notes:  
TSP, CO, NOx and SO 2 related to a 10% O 2 dry base  
 Report %O 2 dry base  
 
  
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
7.10 Secondary lead foundries  
 
Table 10. Maximum permissible limits for secondary lead foundries  
ACTIVITIES   
POLLUTANT  
 SYMB  UNIT  
Operating  New  
Total Suspended Pa rticles        TSP  mg/Nm3 150 50 
Lead  Pb mg/Nm3 100 50 
 
 
7.11 Lead battery factories  
 
                       Table 11.  Maximum permissible limits for lead battery factories  
ACTIVITIES   
POLLUTANT  
 SYMB  UNIT  
Operating  New  
Lead  Pb mg/Nm3 25 1 
Total Su spended Particles  TSP mg/Nm3 150 50 
 
 
7.12 Thermal devices running on used oil  
 
Table 12. Maximum permissible limits  for thermal devices running on used oil  
Pollutant  Symbol  UNIT  Limit  
Sulphur Dioxide         SO 2 mg/Nm3 1 000    
Nitrogen Oxides     NO X mg/Nm3 250 
Carbon Monoxide                 CO mg/Nm3 600 
Total Suspended Particles  TSP mg/Nm3 150 
Hydrochloric Acid  HCl mg/Nm3 Report  
Heavy metals (arsenic, cobalt, chrome, copper, 
manganese, nickel, lead, antimonium, 
vanadium)  As+Co+  
Cr+Cu+  
Mn+Ni+  
Pb+Sb+V  mg/Nm3 Report  
 
Notes:  
TSP, CO, SO 2 and NOx related to a 10% O 2 dry base.  
Report %O 2 dry base  
 
 
 
 
 
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
7.13 Thermal devices which use co -processing  
 
Table 13. Maximum permissible limits for thermal devices which use co -processing  
Limits  Pollutant  
 Symbol  
 UNIT 
Operating  New  
Sulphur Dioxide         SO 2 mg/Nm3 300 
Nitrogen Oxides expressed 
as NO 2     NO X mg/Nm3 2 300  
Carbon Monoxide                 CO mg/Nm3 1 500  
Total Suspended Particles  TSP mg/Nm3 150 
Hydrochloric Acid  HCl mg/Nm3 10 
Mercury  Hg mg/Nm3 0.05 
Cadmium, Thallium  Cd+Tl  mg/Nm3 0.05 
Heavy metals (arsenic, 
cobalt, chrome, copper, 
manganese, nickel, lead, 
antimonium, vanadium)  As+Co+Cr+  
Cu+ Mn+  
Ni+Pb+Sb+V  mg/Nm3 0.5 
Dioxins and Furans  DD/FF  ng 
TEQ/Nm3 0.16 0.10 
Benzene  C6H6 ppm 50 
Total Organic Carbon  TOC  mg C /Nm3 50 
Notes:  
Dry base values, related to 10% oxygen  
 
7.14 Steel manufacture using electric arc ovens  
 
Table 14. Maximum permissible limits for steel factories using electric arc ovens  
ACTIVITIES  
Operat ing New  
Oven capacity   
POLLUTANT  
 Symb  
 UNIT  
 < 5 
tm/cycle  > 5 
tm/cycle   < 5 
tm/cycle  > 5 
tm/cycle  
Total Suspended Particles  TSP mg/Nm3 500 200 350 150 
Heavy Metals (cadmium, 
mercury, arsenic y lead)  Cd, 
Hg, 
As, 
Pb mg/Nm3 Report  
Note:  
The values must be measured in a  complete cycle.  
 
 
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
7.15 Metal casting  
 
Table 15. Maximum permissible limits for steel/iron casting using technologies other 
than the electric arc oven, aluminium casting and copper casting  
 
 Type of 
casting  POLLUTANT  Mass 
pollutant 
flow  
(kg/h)  Concentratio n 
 (mg/m3) 
1. Total Suspended Particles - TSP  All 300 
2. Sulphur Dioxides - SO 2 >5 1)
 
3. Nitrogen Oxides - NO x >5 1)
 
4. Cadmium  >0.001  0.5 
 
5. Mercury  >0.001  0.5 
6. Arsenic  >0.005  4 
7. Lead  >0.025  10 1 Casting of 
steel/iron 
using 
technologies 
other than 
the electric 
arc oven  
8. Fluorine Compounds  > 0.05  10 
1. Total Suspended Particles – TSP  All 300 
2. Fluorine Compounds  > 0.05  10 
3. Total Organic Carbon   All Report  
NOx 1) 1) 2 Aluminium 
casting  
SO2 1) 1) 
1. Total Suspended Particles - TSP  All 300 
2. Sulphur Dioxides - SO 2 >5 1) 
3. Arsenic - As >0.005  4 
4. Cadmium - Cd >0.001  0.5 
5. Copper - Cu >0.025  10 
6. Mercury - Hg. >0.001  0.5 
7. Lead. -Pb >0.025  10 3 Copper 
casting  
NOx 1) 1) 
 
1) For the NOx and SO2 limi t values, the type of fuel being used in these ovens will be taken as the reference, 
thus:  
Diesel: Table 4;      Bunker C: Table 4 ;    Used oil: Table 11  
 
7.16 Incinerators  
Table 16. Maximum permissible limits for incinerators  
POLLUTANT  SYMBOL  UNIT  CONCENTRATI ON 
Sulphur Dioxide  SO 2 mg/Nm3 100 
Carbon Monoxide  CO mg/Nm3 55 
Nitrogen Oxides  NOx  mg/Nm3 385 
Total Suspended 
Particles  TSP mg/Nm3 55  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  Hydrofluoric Acid  HF mg/Nm3 2.2 
Hydrochloric Acid  HCl mg/Nm3 55 
Total Organic Carbon  TOC  mg/Nm3 22 
Dioxins and Fu rans DD/FF  ng TEQ/Nm33 0.1 
Cadmium and Thallium  Cd+Tl  mg/Nm3 0.2  
Mercury  Hg mg/Nm3 0.2  
Other Metals (arsenic, 
lead, nickel, chrome, 
copper, antimonium and 
tin)*  As+ Pb+ Ni+ Cr 
+Cu + Sb +Sn  
  mg/Nm3 0.6 
Notes:  
* Given as a summa tory 
TSP, SO 2, CO, NO x related to a 10% O 2 dry base  
Report %O 2 dry base  
 
 
7.17 Other industries  
These values apply to industries which generate atmospheric emissions through stationary point 
sources . 
Table 17. Maximum permissible limits for other industries  
 
 Other emission sources  Parameter to monitor  Mass pollutant 
flow  
(kg/h)  Limit  
(mg/m3) 
1 Preservation of natural or 
synthetic rubber  Total Organic Carbon TOC  ALL  Report  
2 Extraction of vegetable oil 
and refined fat and 
vegetable oil  Total Organic Carbon TOC  ALL  Report  
3 Print ers and graphic arts 
industries  Total Organic Carbon TOC  ALL  Report  
1. Total Suspended Particles - 
TSP ALL  300 
2. Benzene  > 0.025  10 
3. Vinyl chloride  > 0.025  10 
4. Dichloroethane (1.2 and 
1.1) > 0.1 50 
5. Acetaldehyde  > 0.1 50  Manufacture of 
pharmaceutical products  
6. Acrylic acid  > 0.1 50 
 
7. Benzyl chloride  > 0.1 50 
8. Tetrachloromethane  > 0.1 50 
9. Ethyl acrylate  > 0.1 50 
10. 1.1.1 trichloroethane  > 0.1 50 
11. Trichloromet hane.  > 2 150 
12. Trichloroethylene.  > 2 150  Manufacture of 
pharmaceutical products 
(continued)  
13. Toluene  > 2 150 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  14. Acetone  > 3 200 
Total Organic Carbon TOC  ALL  Report  
1. Total Suspended Par ticles - 
TSP ALL  300 
Total Organic Carbon TOC  ALL  Report  8 Manufacture and 
formulation of pesticides 
(insecticides, fungicides, 
herbicides and rodenticides)  3. Hydrochloric Acid - HCL  >0.3 50 
1. Total Suspended Particles 
–TSP ALL  300 
2. Sulphur Dioxides - SO 2 >5 600 
3. Nitrogen Oxides -NO X >5 600 
4. Hydr ochloric Acid - HCl  >0.3 50 
5. Benzene  > 0.025  10 
6. 1-2 Dichloroethane  > 0.1 50 
7. Ammonia  (NH 3) ALL  35 9 Petrochemical and chemical 
industry  
8. Vinyl chloride  > 0.1 50 
1. Total Suspended Particles 
–TSP ALL  300 
2. Nitrogen Oxides - NO X >5 600 10 Paper pulp production  
3. Sulph ur Oxides - SO x   (for 
those with a sulphur mill).  >5 600 
11 Textile manufacture  Total Organic Carbon TOC  ALL  Report  
12 Electrolyte industry  Total Organic Carbon TOC  ALL  Report  
1. Total Suspended Particles 
–TSP ALL  300 
2. Carbon Monoxide - CO ALL  Report  
3. Acetaldehyde  > 0.1 50 
4.Acetone  > 3 200 
5. Benzene  > 0.025  10 
6. Ethylbenzene  > 2 150 
7. Formaldehyde  > 0.1 50 
8.Toluene  > 2 150 13 Asphalt mixtures production  
9. Xylenes  > 2 150 
 
14 Coating processes (vehicles, 
coils, wires and cables)  Total Organic Carbon TOC  ALL  Report  
1. Hydrochloric Acid - HCL  >0.3 50 15 Production of hydrochloric 
acid and chlorine  
2. Total Suspended Particles 
– TSP  ALL  300 
1. Total Suspended Particles 
–TSP ALL  300 16 Production of phosphoric 
acid 
2. Fluorine compounds given 
as –HF > 0.05  10 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  17 Production of nitric acid  1. Nitrogen Oxides - NO x >5 600 
19 Production of coatings, 
varnishes, paints, dyes and 
adhesives.  Total Organic Carbon TOC  ALL  Report  
1. Total  Suspended Particles 
– TSP  ALL  300 
2. Sulphur Oxides - SO x >5 600 
3. Nitrogen Oxides - NO x >5 600 
4. Fluorine compounds given 
as - HF > 0.05  10 20 Production of clay, brick and 
similar.  
5. Hydrochloric Acid - HCl  >0.3 50 
1. Total Suspended Particles 
- TSP ALL  300 
2. Sulphur oxides - SO x >5 600 21 Production of Calcium 
Carbonate  
3.Carbon Monoxide -CO ALL  Report  
22 Production of Sodium 
Carbonate  Total Suspended Particles - 
TSP ALL  300 
1. Total Suspended Particles 
- TSP  ALL  300 23 Production of fried 
foodstuffs  
Total Organic Carbon  TOC  ALL  Report  
24 Production and conversion of 
fibreglass  Total Suspended Particles - 
TSP ALL  300 
  2. Acetaldehyde.  > 0.1 50 
 
 
Table 17. Maximum permissible limits for other industries (final)  
 
 Other emission 
sources  Parameter to monitor
  Mass 
pollut ant 
flow  
(kg/h)  Limit  
(mg/m3) 
25 Production of yeast  1. Ethanol.  > 3 200 
1. Total Suspended 
Particles - TSP  ALL  300 
2. Sulphur Oxides - SO x >5 600 
3. Nitrogen Oxides - NO x >5 600 
4. Fluorine compounds 
given as - HF > 0.05 10 26 Production of 
refractories  
5. Chrome and its 
components, given as 
Cr. (When using chrome 
and magnesium)  >0.025  10 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  1. Total Suspended 
Particles - TSP  ALL  300 
2. Sulphur Oxides - SO x >5 600 
3. Nitrogen Oxides - NO x >5 600 
4. Lead -Pb >0.025  10 
5. Cadmium - Cd >0.001  0.5 
6. Arsenic -As >0.005  4 
7. Hydrochloric Acid - 
HCl >0.3 50 27 Production of Glass or 
Glass Articles  
8. Fluorine Compounds 
given as - HF > 0.05  10 
28 Grain toasters  Total Suspended 
Particles -TSP ALL  300 
1. Total  Suspended 
Particles –TSP ALL  300 
2.Sulphur Oxides SO x >5 600 
3. Carbon Monoxide CO  ALL  Report  29 Chemical treatment of 
wood  
4. Total Organic Carbon 
TOC  ALL  Report  
 
 
 DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  8. TEST METHODS FOR EMISSIONS FROM STATIONARY SOURCES  
 
 
The test methods contained in the Federal Regulation s Code (CFR) 40 CFR 60 (EPA) may be 
used. Other test methods may be used if duly validated.  
 
Method 1 : Transverse sampling and speed for stationary sources.  
 
Method 1A : Transverse sampling and speed for stationary sources with small chimneys or flues.  
 
Method 2 : Determination of the chimney gas speed an d volumetric flow rate (type S P itot tube).  
 
Method 2A : Direct measurement of the volume of gas through small pipes or flues.  
 
Method 2B : Determination of the exhaust gas volumetric flow rate for petrol vapou r incinerators.  
 
Method 2C : Determination of the chimney gas speed and volumetric flow rate in smal l chimneys or 
flues (standard Pi tot tube).  
 
Method 2D : Measurement of gas volumetric flow rates in small pipes and flues.  
 
Method 2E : Determination of biogas ; gas production flow rate.  
 
Method 3 : Gas analysis for carbon dioxide, oxygen, surplus air and dry molecular weight.  
 
Method 3A : Determination of oxygen and carbon dioxide concentrations in emissions from stationary 
sources (instrumental analysis procedur e). 
 
Method 3B : Gas analysis to determine the correction factor for the rate of emission or surplus air.  
 
Method 3C : Determination of carbon dioxide, methane, nitrogen and oxygen from stationary sources.  
 
Method 4 : Determination of the moisture content in chimney gases.  
 
Method 5 : Determination of emissions of particulate matter from stationary sources.  
 
Method 5A : Determination of emissions of particulate matter from the processing of asphalt and the 
asphalt roofing industry.  
 
Method 5B : Determination of n on-sulphuric acid particulate matter from stationary sources.  
 
Method 5D:  Determination of emissions of particulate matter from positive pressure fabric filters.  
 
Method 5F : Determination of non -sulphate particulate matter from stationary sources.  
 
Method 5G: Determination of emissions of particular matter from firewood -burning heaters from a 
sampling point in the dilution tunnel.  
 
Method 5H : Determination of emissions of particulate matter from firewood -burning heaters from a 
point in the chimney.  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
Method 6: Determination of emissions of sulphur dioxide from stationary sources.  
 
Method 6A : Determination of sulphur dioxide, moisture and carbon dioxide emissions from fossil fuel 
combustion sources.  
 
Method 6B : Determination of average daily emissions of sulph ur dioxide and carbon dioxide from 
fossil fuel combustion sources.  
 
Method 6C : Determination of emissions of sulphur dioxide from stationary sources (instrumental 
analysis procedure).  
 
Method 7 : Determination of emissions of nitrogen oxide from stationary sources.  
 
Method 7A : Determination of emissions of nitrogen oxide from stationary sources – ion 
chromatography method.  
 
Method 7B : Determination of emissions of nitrogen oxide from stationary sources (ultraviolet 
spectrophotometry).  
Method 7C : Determinatio n of emissions of nitrogen oxide from stationary sources – colourimetry / 
alkaline -permanganate method.  
Method 7D : Determination of emissions of nitrogen oxide from stationary sources – ion 
chromatography method / alkaline -permanganate method.  
Method 7E : Determination of emissions of nitrogen oxides from stationary sources (instrumental 
analysis procedure).  
Method 8 : Determination of sulphuric acid mist and sulphur dioxide emissions from stationary 
sources.  
Method 9 : Visual determination of the opacity of e missions from stationary sources.  
Alternative method 1 : Determination of the opacity of emissions from stationary sources using remote      
radar.  
Method 10 : Determination of emissions of carbon monoxide from stationary sources.  
Method 10A : Determination o f emissions of carbon monoxide in certified continuous emissions 
monitoring systems, at oil refineries.  
Method 10B : Determination of emissions of carbon monoxide from stationary sources.  
Method 11 : Determination of the hydrogen sulphide content in currents  of combustible gas in oil 
refineries.  
Method 12 : Determination of emissions of inorganic lead from stationary sources.  
Method 13A : Determination of emissions of total fluoride from stationary sources – SPADNS 
zirconium lake colourimetric method.  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
  Method 13 B: Determination of emissions of total fluoride from stationary sources – specific ion 
electrode method.  
Method 14 : Determination of emissions of fluoride from ceiling monitor segments for primary 
aluminium plants.  
Method 15 : Determination of emissions of hydrogen sulphide, carbonyl sulphide, and carbon 
disulphide from stationary sources.  
Method 16 : Semi -continuous determination of sulphur emissions from stationary sources.  
Method 16A : Determination of emissions of total reduced sulphur from stationary sour ces (impression 
technique).  
Method 16B : Determination of emissions of total reduced sulphur from stationary sources.  
Method 17 : Determination of particulate emissions from stationary sources (filtration inside the 
chimney method).  
Method 18 : Measurement of  emissions of gaseous organic compounds by gas chromatography.  
 
Method 19 : Determination of the effectiveness of removal of sulphur dioxide and particulate matter, 
rates of emission of sulphur dioxide and nitrogen oxides.  
 
Method 20 : Determination of emiss ions of nitrogen oxides, sulphur dioxide, and diluent from 
stationary gas turbines.  
 
Method 21 : Determination of leaks of volatile organic compound.  
 
Method 22 : Visual determination of fugitive emissions from material sources and flame smoke 
emissions.  
 
Method 23 : Determination of Polychlorinated Dibenzo -p-Dioxins and Polychlorinated Dibenzofurans 
from stationary sources.  
 
Method 25 : Determination of total gaseous non -methane organic emissions as carbon.  
 
Method 25A : Determination of total gaseous organic c oncentrations using a flame ionisation analyser.  
 
Method 25B : Determination of the total gaseous organic concentration using a non -dispersive infrared 
analyser.  
 
Method 26 : Determination of emissions of hydrogen chloride emissions from stationary sources.  
 
Method 27 : Determination of the vapour tension in petrol delivery tanks using the pressure – vacuum 
test. 
 
Method 28 : Certification and auditing of firewood -burning heaters.  
 
Method 28A : Air-fuel ratio measurement and minimum feasible burning ranges for f irewood -burning 
devices.  DRAFT SALVADORAN STANDARD                                      NSO 13.11.02:07  
 
   
Method 29 : Determination of emissions of metals from stationary sources.  
 
 
 
9.    SECTORS NOT COVERED BY THIS STANDARD  
For sectors and pollutants not considered in this standard, the MARN will establish the 
maximum permissible lim its. 
 
 
10. BIBLIOGRAPHICAL REFERENCE  
− Proposed Air Emissions Standard.  Environmental Health Board , Ministry of Public 
Health and Social Welfare, December 1997.  
 
− 40 CFR 60, 1997, US “Environmental Protection Agency: EPA, Air Programs 
(continued) , Standards o f Perform ance for New Stationary Sources” .  
 
− Decree 833/1975 which develops the Atmospheric Environment Protection Law 38/1972. 
Boletin Oficial del Estado [Official State Gazette] . Number 96, 22 April 1975. Spanish 
State.  
 
− Technical Guidelines and Environ mental Guides. World Bank, 1995 and 1998.  
 
− AP-42 EPA, 1992: US “ Environmental Protec tion Agen cy: EPA, Compi lation of  Air 
Pollution Emission Factors ”. 
 
11. COMPLIANCE AND VERIFICATION . 
 
The Ministry of the Environment and Natural Resources is responsibl e for monitoring 
compliance with this mandatory standard.  
 
To comply with this standard, the owner of the activity, work or project may voluntarily 
subscribe to a self -regulation programme with the MARN.  
                      
-END OF STANDARD -