Regulation 2(3)
1. Samples must be taken in accordance with the requirements of Schedule 3 in any year throughout the period beginning on 1st May and ending on 30th September.
2. Additional samples must be taken during that period if there are grounds to suspect that the quality of the waters is deteriorating for any reason or is likely to deteriorate as a result of any discharge.
3. All samples must be taken at the same point at the place in the particular waters where the daily average density of bathers is at its highest,and preferably 30 centimetres below the surface, except in the case of samples for testing for mineral oils, which must be taken at surface level.
4. The methods of analysis and inspection specified in Schedule 3, or methods which are at least as reliable, must be used for determining whether the parametric values specified in that Schedule are met.