Section 2. Quality Monitoring. The DOE, through the OIMB and the counterpart Field Offices, shall, among others, conduct random quality and quantity sampling and testing of gasoline and diesel obtained from the facilities of the oil companies to ensure compliance with Section 1 of this Circular: Provided further, That failure to comply with the PNS shall constitute the offense of Adulteration as defined and punishable under existing circulars.