Paragraph 7 Interpretation

If acid and gas production is absent from two of the three tubes the portion of the sample which has been tested shall be presumed to contain no less than one coliform.

The result of the test shall be recorded as less than 1 per ml. where 1 ml. of milk has been used as the inoculum, and as less than 100 per ml. where 1 ml. of 1 in 100 dilution of the milk has been used as the inoculum.