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Draft Oxygen Correction Factor

This memorandum from the Department of Environment and Natural Resources clarifies the requirements for measuring air pollutant concentrations at emission points to determine compliance. It provides standard oxygen correction factors ranging from 7-15% that must be applied to sample results based on the type of equipment to accurately measure pollutant concentrations and avoid dilution. A specific equation is also provided to correct stack concentrations using the measured and standard oxygen levels. Regional offices are instructed to apply these new conditions when renewing existing permits to operate, not for permits issued before this circular.

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Jan Karina Lapeña Padla
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486 views1 page

Draft Oxygen Correction Factor

This memorandum from the Department of Environment and Natural Resources clarifies the requirements for measuring air pollutant concentrations at emission points to determine compliance. It provides standard oxygen correction factors ranging from 7-15% that must be applied to sample results based on the type of equipment to accurately measure pollutant concentrations and avoid dilution. A specific equation is also provided to correct stack concentrations using the measured and standard oxygen levels. Regional offices are instructed to apply these new conditions when renewing existing permits to operate, not for permits issued before this circular.

Uploaded by

Jan Karina Lapeña Padla
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Republic of the Philippines

Department of Environment and Natural Resources


ENVIRONMENTAL MANAGEMENT BUREAU
DENR Compound, Visayas Avenue, Diliman, Quezon City 1116
Telephone Nos. 927-1517, 928-2096
Email: emb@emb.gov.ph Visit us
at http://www.emb.gov.ph

EMB MEMORANDUM CIRCULAR


No. 2020 -

SUBJECT: CLARIFYING THE REQUIREMENTS STATED UNDER SECTION 14, RULE


XIX OF DEPARTMENT ADMINISTRATIVE ORDER NO. 2000-81 (DAO No.
2000 – 81)

DATE :

Section 14, Rule XIX of DAO No. 2000-81 provides that permits issued by the Bureau will generally
contain source-specific monitoring and reporting requirements for air pollutant concentrations at the point of
emission, for determination of compliance with the requirements of Rule XXV.
In this regard, this Office requires all EMB Regional Offices to correct all sample results to the standard
operating conditions following the herein equipment specific Oxygen (O2) correction factors and formula to
measure the concentration of air pollutants accurately at the point of emission and avoid dilution.
Standard Oxygen
Equipment
Correction Factor (%)
Oil Fired Boilers including diesel, light fuel oil, heavy fuel oil, and bunker C, natural
7%
gas-fired boilers
Coal-fired boilers 7%
Diesel/distillate, petrol, and bunker C fired generator sets 13%
Natural gas-fired gas turbines 15%
Cement kilns 8%
Wood fired boilers and cookers (split logs, sawdust, shavings, and hoggings) 13%
Petroleum refinery heaters 7%
Natural gas-fired boilers 7%
Waste-to-Energy (WTE)/Bagasse fired boilers 11%
Furnaces 13%

Further, the correction of stack concentration shall use the equation below:

where:
𝐶𝑜𝑛𝑐(𝑆𝑡𝑑 𝑂2 ) = 𝐺𝑎𝑠 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑖𝑜𝑛 𝑎𝑡 𝑠𝑡𝑎𝑛𝑑𝑎𝑟𝑑 𝑂2 𝑙𝑒𝑣𝑒𝑙
𝐶𝑜𝑛𝑐(𝑀𝑒𝑎𝑠𝑢𝑟𝑒𝑑) = 𝐺𝑎𝑠 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑖𝑜𝑛 𝑎𝑡 𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑 𝑂2 𝑙𝑒𝑣𝑒𝑙
𝑆𝑡𝑑(𝑂2 ) = 𝑂𝑥𝑦𝑔𝑒𝑛 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑖𝑜𝑛 𝑎𝑡 𝑠𝑡𝑎𝑛𝑑𝑎𝑟𝑑 𝑙𝑒𝑣𝑒𝑙
𝑀𝑒𝑎𝑠𝑢𝑟𝑒𝑑 𝑂2 = 𝑂𝑥𝑦𝑔𝑒𝑛 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑖𝑜𝑛 𝑎𝑡 𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑 𝑙𝑒𝑣𝑒𝑙

The Regional Office shall not apply the herein conditions on the use of correction factors for the sources
with valid Permit to Operate (PTO) existing before the effectivity of this Circular, provided these correction
factors apply upon the renewal of the PTO of the existing source.
This Circular shall take effect immediately.

ENGR. WILLIAM P. CUÑADO


OIC-DIRECTOR

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