What are the design requirements for entry hatches on wet wells, clearwells, tanks and reservoirs?
The requirements are specified in the Arizona Department of Environmental Quality's (ADEQ) Engineering Bulletin No. 10, "Guidelines for the Construction of Water Systems", Chapter 6, Section E.8.

Entry hatches shall be constructed with seals to prevent the entry of unsafe water, birds and insects into the containment vessel. Typical entry hatch designs include frames with integral curbs and frame overlapping covers with rubber or plastic seals. For more information, please call 602-372-2861.

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1. Is emergency power required for a water treatment plant?
2. Is emergency power required for groundwater production facilities?
3. Is emergency power required for distribution system facilities?
4. What are the requirements for equipment and process redundancy for a water treatment plant?
5. What are the requirements related to the rated capacity of a water treatment plant?
6. What are some key issues when converting a groundwater production facility to a water treatment plant?
7. What are the design requirements for venting wet wells, clearwells, tanks and reservoirs?
8. What are the design requirements for wet well, clearwell, tank or reservoir overflows?
9. What are the design requirements for entry hatches on wet wells, clearwells, tanks and reservoirs?
10. Can pump seal water be discharged to a pump wet well?