Course: BFM 203 Water Treatment and Control

Lecture

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Definitions in Water Regulations

As with acronyms, you will see numerous terms in water quality regulations with which you will need to become familiar. Carefully review the following definitions; accurate classification of each water system determines both which portions of the regulations must be followed and an adequate sampling protocol.

1. Average Residence Time: The time at which treated water has been in the system for half of its maximum time, measured by transport time.

2. BAT: The best available technology, based on field tests as well as lab tests, used for setting MCLs, with cost as a consideration.

3. Community Water System: Has 15 taps or 25 year-round residents.

4. Public Water System: Has 15 taps or 25 residents 60 days per year.

5. Non-Transient Non-Community: Serves 25 of the same people over 6 months

6. CT calc - C: Residual Disinfectant Concentration where T = Contact Time and C*T = CT calc

7. Near First Service Connection: One of the first 20 Percent closest to the POE (point of entry), measured in transport time.

8. Waiver: Reduction of monitoring

9. Vulnerability Use Waiver: CDPHE determines that the contaminant was not used in the area and produces no risk.

10. Waiver By Rule: System meets specific requirements for a monitoring reduction.

11. Monitoring Plan: Requires system summary, water source details, treatment details, distribution details, and individual rule sampling plans. Any changes must be submitted within 30 days of the change. A systems monitoring plan must be reviewed at least annually, and the change in population served should be calculated to determine the correct number of drinking water samples that must be collected each month.