[ DENR MEMORANDUM ORDER NO. 97-08, September 09, 1997 ]
TRANSITORY GUIDELINES FOR THE IMPLEMENTATION OF DENR ADMINISTRATIVE ORDER NO. 97-23, UPDATING DEPARTMENT ADMINISTRATIVE ORDER NO. 34, SERIES OF 1990, OTHERWISE KNOWN AS THE REVISED WATER USAGE CLASSIFICATION/WATER QUALITY CRITERIA AMENDING SECTION NO. 68 AND 69, CHAPTER III OF THE 1978 NPCC RULES AND REGULATIONS
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To keep in line with internationally-used basis, DENR Administrative Order No. 97-23 (DAO 97-23) has revised the method for determining compliance with the water quality criteria for fecal coliform for tourist zones and bathing areas in tourist zones, from obtaining the three (3) month geometric mean of the Most Probable Number of coliform organism to the geometric mean of the results of at least five (5) consecutive sampling events.
In recognition of the soundness of the method which is now embodied in DAO 97-23, to ensure that the time spent and effort exerted in obtaining water samples before the effectivity of DAO 97-23 are not rendered useless by said amendment, and to ensure a smooth transition from the old to the new basis, it is hereby declared that the results of physical, chemical, and bacteriological analyses of samples taken not later than two (2) months before the effectivity of DAO 97-23 may be considered in determining compliance with DAO 97-23.
This Order shall take effect immediately.
Adopted: 09 Sept. 1997
(SGD.) VICTOR O. RAMOS
Secretary
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Secretary