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Annex 4.<br />

National ambient air quality guideline values (Philippines).*<br />

Description<br />

Air Air Quality Criteria<br />

Source<br />

Suspended particulate matter<br />

a.<br />

b.<br />

TSP (μg/NCM; ppm)<br />

PM-10 (μg/NCM; ppm)<br />

a.<br />

b.<br />

230; _<br />

150; _<br />

Sulfur dioxide (μg/NCM; ppm) 180; 0.07<br />

Nitrogen dioxide (μg/NCM; ppm) 150; 0.08<br />

Photochemical oxidants as ozone (μg/NCM; ppm)<br />

Carbon monoxide (mg/NCM; ppm)<br />

Lead (μg/NCM)<br />

140; 0.07 (1 hr); 60; 0.03 (8 hrs)<br />

35; 30 (1 hr); 10; 9 (8 hrs)<br />

1.5<br />

DAO 81<br />

* Short-term — Maximum limits represented by ninety-eight percentile (98%) values not to exceed more than once a year.<br />

Reference<br />

DAO 81 (DENR Administrative Order No. 81). 2000. Implementing Rules and Regulations for RA 8749 (Philippine Clean<br />

Air Act of 1999). Environmental Management Bureau, Department of Environment and Natural Resources, Quezon<br />

City, Philippines.<br />

118 State of the Coasts of Batangas Province

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