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// CODE SNIPPET

P3009.8 Percolation Tests

Residential Code 2018 of Kansas > 30 Sanitary Drainage > P3009 Subsurface Landscape Irrigation Systems > P3009.8 Percolation Tests
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The permeability of the soil in the proposed absorption system shall be determined by percolation tests or permeability evaluation.

P3009.8.1 Percolation Tests and Procedures

Not less than three percolation tests in each system area shall be conducted. The holes shall be spaced uniformly in relation to the bottom depth of the proposed absorption system. More percolation tests shall be made where necessary, de-pending on system design.

P3009.8.1.1 Percolation Test Hole

The test hole shall be dug or bored. The test hole shall have vertical sides and a horizontal dimension of 4 inches to 8 inches (102 mm to 203 mm). The bottom and sides of the hole shall be scratched with a sharp-pointed instrument to expose the natural soil. Loose material shall be removed from the hole and the bottom shall be covered with 2 inches (51 mm) of gravel or coarse sand.

P3009.8.1.2 Test Procedure, Sandy Soils

The hole shall be filled with clear water to not less than 12 inches (305 mm) above the bottom of the hole for tests in sandy soils. The time for this amount of water to seep away shall be determined, and this procedure shall be repeated if the water from the second filling of the hole seeps away in 10 minutes or less. The test shall proceed as follows: Water shall be added to a point not more than 6 inches (152 mm) above the gravel or coarse sand. Thereupon, from a fixed reference point, water levels shall be measured at 10-minute intervals for a period of 1 hour. Where 6 inches (152 mm) of water seeps away in less than 10 minutes, a shorter interval between measurements shall be used. The water depth shall not exceed 6 inches (152 mm). Where 6 inches (152 mm) of water seeps away in less than 2 minutes, the test shall be stopped and a rate of less than 3 minutes per inch (7.2 s/mm) shall be reported. The final water level drop shall be used to calculate the percolation rate. Soils not meeting these requirements shall be tested in accordance with Section P3009.8.1.3.

P3009.8.1.3 Test Procedure, Other Soils

The hole shall be filled with clear water, and a minimum water depth of 12 inches (305 mm) shall be maintained above the bottom of the hole for a 4-hour period by refilling whenever necessary or by use of an automatic siphon. Water remaining in the hole after 4 hours shall not be removed. Thereafter, the soil shall be allowed to swell not less than 16 hours or more than 30 hours. Immediately after the soil swelling period, the measurements for determining the percolation rate shall be made as follows: any soil sloughed into the hole shall be removed and the water level shall be adjusted to 6 inches (152 mm) above the gravel or coarse sand. Thereupon, from a fixed reference point, the water level shall be measured at 30-minute intervals for a period of 4 hours, unless two successive water level drops do not vary by more than 1/16 inch (1.59 mm). Not less than three water level drops shall be observed and recorded. The hole shall be filled with clear water to a point not more than 6 inches (152 mm) above the gravel or coarse sand whenever it becomes nearly empty. Adjustments of the water level shall not be made during the three measurement periods except to the limits of the last measured water level drop. When the first 6 inches (152 mm) of water seeps away in less than 30 minutes, the time interval between measurements shall be 10 minutes and the test run for 1 hour. The water depth shall not exceed 5 inches (127 mm) at any time during the measurement period. The drop that occurs during the final measurement period shall be used in calculating the percolation rate.

P3009.8.1.4 Mechanical Test Equipment

Mechanical percolation test equipment shall be of an approved type.

P3009.8.2 Permeability Evaluation

Soil shall be evaluated for estimated percolation based on structure and texture in accordance with accepted soil evaluation practices. Borings shall be made in accordance with Section P3009.8.1.1 for evaluating the soil.

Related Code Sections


1402.2 Subsurface Landscape Irrigation Systems, Percolation Tests
The permeability of the soil in the proposed absorption system shall be determined by percolation tests or permeability evaluation ...
Plumbing Code 2018 of Kansas > 14 Subsurface Landscape Irrigation Systems > 1402 System Design and Sizing > 1402.2 Percolation Tests
P3009.8 Sanitary Drainage, Percolation Tests
The permeability of the soil in the proposed absorption system shall be determined by percolation tests or permeability evaluation ...
Residential Code 2018 of Kansas > 30 Sanitary Drainage > P3009 Subsurface Landscape Irrigation Systems > P3009.8 Percolation Tests
P3009.8.1.2 Sanitary Drainage, Test Procedure, Sandy Soils
) shall be reported. The final water level drop shall be used to calculate the percolation rate. Soils not meeting these requirements shall be tested ...
Residential Code 2018 of Kansas > 30 Sanitary Drainage > P3009 Subsurface Landscape Irrigation Systems > P3009.8 Percolation Tests > P3009.8.1 Percolation Tests and Procedures > P3009.8.1.2 Test Procedure, Sandy Soils
P3009.8.1.3 Sanitary Drainage, Test Procedure, Other Soils
for determining the percolation rate shall be made as follows: any soil sloughed into the hole shall be removed and the water level shall be adjusted to 6 ...
Residential Code 2018 of Kansas > 30 Sanitary Drainage > P3009 Subsurface Landscape Irrigation Systems > P3009.8 Percolation Tests > P3009.8.1 Percolation Tests and Procedures > P3009.8.1.3 Test Procedure, Other Soils
1402.2.1.4 Subsurface Landscape Irrigation Systems, Mechanical Test Equipment
Mechanical percolation test equipment shall be of an approved type ...
Plumbing Code 2018 of Kansas > 14 Subsurface Landscape Irrigation Systems > 1402 System Design and Sizing > 1402.2 Percolation Tests > 1402.2.1 Percolation Tests and Procedures > 1402.2.1.4 Mechanical Test Equipment
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