Ambient Air Quality Guideline Values and Standards.
Section 12
SEC. 12. Ambient Air Quality Guideline Values and Standards. - The Department, in coordination with other concerned agencies, shall review and/or revise and publish annually a list of hazardous air pollutants with corresponding ambient guideline values and/or standard necessary to protect public health and safety, and general welfare. The initial list and values of the hazardous air pollutants shall be as follows: (a) For National Ambient Air Quality Guideline for Criteria Pollutants: Short Terma Long Termb Pollutants �g/Ncm ppm Averaging Time �g/Ncm ppm Averaging Time Suspended Particulate Matterc - TSP 230d 24 hours 90 1 yeare - PM-10 150f 24 hours 60 1 yeare Sulfur Dioxidec 180 0.07 24 hours 80 0.03 1 year Nitrogen Dioxide 150 0.08 24 hours -- Photochemical Oxidants 140 0.07 1 hour -. -. -. As Ozone 60 0.03 8 hours -- -- -- Carbon Monoxide 35 mg/Ncm 30 1 hour -- -- -- 10 mg/Ncm 9 8 hours -- -- -- Leadg 1.5 3 monthsg 1.0 -- 1 year a Maximum limits represented by ninety-eight percentile (98%) values not to exceed more than once a year. bArithmetic mean c SO2 and Suspended Particulate matter are sampled once every six days when using the manual methods. A minimum of twelve sampling days per quarter or forty-eight sampling days each year is required for these methods. Daily sampling may be done in the future once continuous analyses are procured and become available. d Limits for Total Suspended Particulate Matter with mass median diameter less that 25-50 �m. e Annual Geometric Mean f Provisional limits for Suspended Particulate Matter with mass median diameter less than 10 microns and below until sufficient monitoring data are gathered to base a proper guideline. g Evaluation of this guideline is carried out for 24-hour averaging time and averaged over three moving calendar months. The monitored average value for any three months shall not exceed the guideline value. (b) For National Ambient Air Quality Standards for Source Specific Air Pollutants from Industrial Sources/Operations: Pollutants1 Concentration2 Averaging time Methods of Analysis/ Measurement �g/Ncm ppm (min) 1. Ammonia 200 0.28 30 Nesslerization/Indo Phenol 2.Carbon Disulfide 30 0.01 30 Tisher Method 3. Chlorine and Chlorine compounds expressed as Cl2 100 0.03 5 Methyl Orange 4. Formaldehyde 50 0.04 30 Chromotropic acid Method or MBTH Colorimetic Method 5.Hydrogen Chloride 200 0.13 30 Volhard Titration with Iodine Solution 6. Hydrogen Sulfide; 100 0.07 30 Methylene Blue 7. Lead 20 30 AASc 8. Nitrogen Dioxide 375 0.20 30 Greiss-Saltzman 260 0.14 60 9. Phenol 100 0.03 30 4-Aminoustiphyline 10. Sulfur Dioxide 470 340 0.18 0.13 30 60 Colorometric-Pararosaniline 11.Suspended Particulate Matter -TSP 300 -- 30 Garvimetric --PM10 200 -- 60 -do- Pertinent ambient standards for Antimony, Arsenic, Cadmium, Asbestos, Nitric Acid and Sulfuric Acid Mists in the 1978 NPCC Rules and Regulations may be considered as guides in determining compliance. Ninety-eight percentile (98%) values of 30-minute sampling measured at 25�C and one atmosphere pressure. Other equivalent methods approved by the department may be used. The basis in setting up the ambient air quality guideline values and standards shall reflect, among others, the latest scientific knowledge including information on: Variable factors, including atmospheric conditions, which of themselves or in combination with other factors may alter the effects on public health or welfare of such air pollutant: The other types of air pollutants which may interact with such pollutant to produce an adverse effect on public health or welfare; and The kind and extent of all identifiable effects on public health or welfare which may be expected from the presence of such pollutant in the ambient air, in varying quantities. The Department shall base such ambient air quality standards on World Health Organization (WHO) standards, but shall not be limited to nor be less stringent than such standards.