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SOIL LOADING RATE TABLE
This is based on a standard tubing spacing between runs of 2 feet on center. Therefore a typical area loading rate would be a number which is one half the linearfeet loading rate number. For example, for a 1.2 gallons/L.ft./day rate would be equivalent to 0.6 gallons/ft2/day. Spacing may be changed for specific site conditions. For example: a tubing loading rate of 0.4 is an area load of 0.2. By placing the tubing 1' on center, the resulting area loading would be at 0.4, or 1/2 of the area. This can only be done with proper site and soil evaluation.

Soil Textures



Soil Structure



Maximum Monthly Average
BOD5 > 30mg/L
BOD < 220mg/L
(gal./ft2/day)     (gal./LF/day)
Maximum Monthly
Average
BOD5 < 30mg/L
(gal./ft2/day)     (gal./LF/day)
Course sand or courserN/A.3 - .4          .6 - .8.3 - 1.6          .6 - 3.2
Loamy coarse sandN/A.25 - .3          .5 - .6.25 - 1.4          .5 - 2.8
SandN/A.25 - .3          .5 - .6.25 - 1.2          .5 - 2.4
Loamy sandWeak to strong.25 - .3          .5 - .6.25 - 1.4          .5 - 2.4
 Massive.15 - .2          .3 - .4.15 - .7          .3 - 1.4
Fine sandModerate to strong.25 - .3          .5 - .6.25 - .9          .1 - 1.8
 Massive or weak.15 - .2          .3 - .4.15 - 0.6          .3 - 1.2
Loamy fine sandModerate to strong.2 - .3          .4 - 0.6.2 - 0.9          .4 - 1.8
 Massive or weak.15 - .2          .3 - .4.15 - .6          .3 - 1.2
Very fine sandN/A.15 - .2          .3 - .4.15 - .6          .3 - 1.2
Loamy very fine sandN/A.15 - 0.2          .3 - .4.15 - .6          .3 - 1.2
Sandy loamModerate to strong.15 - 0.2          .3 - .4.15 - 1          .3 - 2
 Weak, weak platy.15 - 0.2          .3 - .4.15 - .6          .3 - 1.2
 Massive< .1          < .2.1 - .5          .2 - 1
LoamModerate to strong.15 - .2          .3 - .4.15 - .9         .3 - 1.8
 Weak, weak platty.1 - 0.2          .2 - .4.1 - .6          .2 - 1.2
 Massive< .1          < .2.1 - .5          .2 - 1
Silt loamModerate to strong.15 - .2          .3 - .4.15 - .8          .3 - 1.6
 Weak, weak platy< .1          < .2.1 - .3          .2 - .6
 Massive0          0.1 - .2          .2 - .4
Sandy clay loamModerate to strong.15 - .2          .3 - .4.15 - .6          .3 - 1.2
Clay loamWeak, weak platy< .1         < .2.1 - .3          .2 - .6
 Weak, weak platy< .1          < .2.1 - .3          .2 - .6
 Moderate to strong.1 - .2          .2 - .4.1 - .6          .2 - 1.2
Silty clay loamWeak, weak platy< .1          < .2.1 - .3          .2 - .6
 Massive0         00          0
 Moderate to strong.1 - .2          .2 - .4.1 - .6          .2 - 1.2
Sandy clayModerate to strong< .1          < .2.1 - .3          .2 - .6
 Massive to weak0          00          0
ClayModerate to strong< .1          < .2.1 - .3          .2 - .6
 Massive to weak0          00          0
Silty clayModerate to strong< .1          < .2.1 - .3          .2 - .6
 Massive to weak0          00          0

Site suitability, loading rate, and installation depth determination must be assigned based on thorough site/soil evaluation. The characterization of a soil based receiver site involves a systematic evaluation by trained individuals. Conditions to consider consist of a variety of topographic and soil conditions such as landscape position, slope, soil depth, depth to water table, depth to restriction, soil consistence, clay mineralogy, compaction, density, and site geometry and uniformity.

Drip dipsosal lends itself to shallow installation. Typical depths are from 6-18", with 8-10" preferred and 18-24" installations infrequent. Separation to limitations should always be maximized while maintaining a consistent depth on contour in a permeable horizon.

Refer to state and local regulatory requirements for appropriate site suitability guidance.


AMERICAN MANUFACTURING COMPANY, INC.
Last revised: Mar-1-2011
Comments to: info@americanonsite.com
Copyright © American Manufacturing Company, Inc., 2000

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