Pursuant to Section 69 of the DENR Administrative Order (DAO) No. 34 Series of 1990 or the Revised Water Usage and Classification/Water Quality Criteria, and Section 4 of the DENR Administrative Order (DAO) No. 35, Series of 1990 or the Revised Effluent Standards of 1990, all industrial establishments, whether old, existing, new or proposed, and all users of said Orders, shall refer to the cyanide criteria and standards as "free" cyanide.

This Memorandum Circular shall take effect immediately.

Adopted: 31 Aug. 2004

(SGD.) ELISEA G. GOZUN
Secretary

Recommending Approval:

(SGD.) ROLANDO L. METIN
Undersecretary for Management and Technical Services

(SGD.) JULIAN D. AMADOR
EMB Director