620.09 (f)
Table 620-26 Treatment of Wastewater by the Overland Flow Process
| LIMITS
|
|
|
PROPERTY |
SLIGHT |
MODERATE |
SEVERE | RESTRICTIVE FEATURE
|
| 1.
| USDA TEXTURE
| ---
| ---
| ICE
| PERMAFROST
|
| 2.
| SLOPE (PCT)
| 1-6
| 6-12
| >12
| SLOPE
|
| 2a.
| SLOPE (PCT)
| ---
| .5-1
| <.5
| SLOPE
|
| 3.
| PERMEABILITY (SURFACE LAYER, IN/H)
| <0.2
| .2-.6
| >.6
| SEEPAGE
|
| 4.
| DEPTH TO BEDROCK (IN)
| >60
| 40-60
| <40
| DEPTH TO ROCK
|
| 5
| PONDING
| ---
| ---
| +
| PONDING
|
| 6.
| DEPTH TO HIGH WATER TABLE (FT)
| >4
| 2-4
| <2
| WETNESS
|
| 7.
| FLOODING
| NONE
| RARE
| OCCAS, FREQ
| FLOODING
|
| 8.
| STONINESS CLASS
| 1
| 2
| 3, 4, 5
| TOO STONY
|
| 9.
| WEIGHT PERCENT 3-10 (0-40)
| <15
| 15-35
| >35
| TOO COBBLY
|
| 9a.
| WEIGHT PERCENT >10 (0-40)
| <5
| 5-15
| >15
| TOO STONY
|
| 10.
| SOIL REACTION (pH, SURFACE LAYER)
| >6.5
| 5.0-6.5
| <5.0
| TOO ACID
|
| 11.
| DEPTH TO CEMENTED PAN (IN)
| >60
| 40-60
| <40
| CEMENTED PAN
|
| 12.
| SODIUM ADSORPTION RATIO (0-20)
| <4
| 4-13
| >13
| EXCESS SODIUM
|
| 13.
| SALINITY SURFACE LAYER, MMHOS/CM)
| <8
| 8-16
| >16
| EXCESS SALT
|
| 14.
| CLAY ACTIVITY (CEC/CLAY)
| >.15
| .05-.15
| <.05
| LOW ADSORPTION
|