After review by licensed and…

After review by licensed and experienced water/wastewater treatment staff working for member regions/municipalities of the Regional Public Works Commissioners of Ontario (RPWCO), the following comments are respectfully submitted:

Items requiring clarification:

1) The definition of "refrigeration" needs to be clarified throughout the document. I.e., does this mean keeping samples cool (at a prescribed temperature) or keeping samples in a mechanical refrigerator?

2) Section 3.2.2 Treated Water

"In those rare situations where disinfection is achieved in the first run of distribution pipe after the treatment facility, it is recommended that a sample line draw water from that point for the purpose of treated water sampling."

The definition of "recommended" needs to be clarified. There are cases where piping that could be considered the "first run of distribution pipe" are actually included in the ECA as part of the chlorine gas contact facility. Will site specific information be taken into account before recommendations are made?

Suggested Additions:

1) Section 3.5.1 - Suggest adding that during transportation, VOC sample containers should not be stored with other sample container types that have been solvent rinsed (e.g., NDMA bottles).

2) Section 3.6 - Suggest adding that permanent markers not be used to label VOC sample containers as makers contain VOCs and can lead to false positive sample results. Alternatively, use of markers is permitted after samples have been collected, and the sample container appropriately sealed.