The specific provisions of Section 60 (b) of DA014, S93 are hereby clarified as follows-

1. "Fuel Burning Steam Generators" cover not only "steam generators" but also "all other fuel burning equipment"
   
   
2. Total oxides of sulfur should be measured, irrespective of whether the concentration is expressed as SO2 or SO3.
   
   
   1. If the concentration is expressed as SO2, the air sampling result shall be reported as the sum of SO2 and SO3, with the latter stoichiometrically converted to SO2
      
      
   2. If the concentration is expressed as SO3, the air sampling result shall be reported as the sum of SO2 and SO3 with the former stoichiometrically converted to SO3

-For information and guidance of all concerned.

Adopted: 06 June 1997

(SGD.) VICTOR O. RAMOS
Secretary