Nev. Admin. Code § 444.8366 - Chamber system: Design criteria

1. The health authority shall provide a sizing chart for each chamber system which it approves. The sizing chart must list the number of chamber units required for a specific size of septic tank and percolation rate.

2. The percolation rate of the soil on which a chamber system is placed must not be slower than 60 minutes per inch.

3. The invert of the drain piping entering the first chamber of the system must not be more than 48 inches below the finished grade. The trench depth for a chamber system must not be more than 5 feet below the finished grade. The top of the chamber system must be at least 6 inches below the natural soil surface, and a capping fill must be placed over the top of the chamber system to allow for settling.

4. The absorption trenches for a chamber system must not be longer than 110 feet.

5. Excavations for absorption trenches for a chamber system must be spaced so that there is at least 6 feet between the trenches, as measured from the centerline of the trenches.

6. The bottom of the excavation for an absorption trench to be used in a chamber system must be level. The owner must take such precautions as are necessary to avoid compacting the bottom of the trench. Loose or smeared soil must be raked and removed. No vehicles may travel on the area of an absorption trench after the excavation of the trench.

7. Dosing is required if more than 500 linear feet of absorption trench are required.

8. If a chamber system is used in conjunction with an absorption bed rather than an absorption trench, the chamber system and the absorption bed must comply with the requirements relating to the sizing for absorption beds set forth in NAC 444.8358 and 444.8361. The sizing chart provided by the health authority pursuant to this section must not be used to size an absorption bed in which a chamber system will be placed.

Notes

Nev. Admin. Code § 444.8366

Added to NAC by Bd. of Health by R129-98, eff. 3-25-99; A by R100-07, 10-31-2007

NRS 439.200, 444.650