NAC444.7966. Presoaking procedure for slow percolation test.

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The following flow chart illustrates the presoaking procedure for a slow percolation test:

1)	Fill the percolation hole with clear water to a minimum depth of 12 inches over the aggregate.

2)	Maintain at least 12 inches of water over the aggregate in the hole for 4 hours.

3)	Any water remaining in the hole at the end of the 4-hour period must be allowed to seep away. Do not remove the water.

4)	Let the hole sit for not less than 16 hours or more than 30 hours. Swelling of the soil will occur during this period. The SLOW PERCOLATION TEST PROCEDURE must begin no sooner than 16 hours and no later than 30 hours after the end of the 4-hour soaking period.

(Added to NAC by Bd. of Health by R129-98, eff. 3-25-99)

                    
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