Section 980. Microscreening

A microscreen is a mechanical supplement to treatment capable of removing suspended matter from water by straining. It shall not be used as a substitute for clarification or filtration.

A. The design of microscreening facilities shall give due consideration to:

1. A sanitary survey and chemical and biological evaluation;

2. The nature of suspended matter to be removed;

3. The corrosiveness of water;

4. The effect of chlorination when required as pretreatment; and

5. Control of the hydraulic capacity of the microscreen.

B. The design shall provide:

1. For durable, corrosion resistant screens;

2. A bypass and cleaning arrangement;

3. Duplicate units for continuous operation;

4. Protection against back siphonage when potable water is used for washing; and

5. Proper disposal of wash water.

Historical Notes

Derived from VR355-18-009.14 § 3.35, eff. August 1, 1991; amended, Volume 09, Issue 17, eff. June 23, 1993.

Statutory Authority

§§ 32.1-12 and 32.1-170 of the Code of Virginia.