Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828)

1 The pH of composite samples obtained from each liquid effluent outfall and from the once-through cooling water shall be determined using

• (a) the test method prescribed in section 221 of the publication Standard Methods for the Examination of Water and Waste Water, 13th edition (1971), published jointly by the American Public Health Association, American Water Works Association and the Water Pollution Control Federation; or

• (b) another equivalent method, approved in writing by the Minister, the results of which can be confirmed by the method referred to in paragraph (a).

2 For the purpose of section 1, composite sample has the same meaning as in subsection 2(2) of Schedule IV.