TYPE IV SYSTEMS

Subpart 1. General. A system designed according to this part is considered a Type IV system. The system must: A. employ design flow values in parts 7080.1850 to 7080.1885 ; B. meet or exceed applicable technical requirements of parts 7080.1900 to 7080.2030 , 7080.2050 , and 7080.2100 ; C. meet or exceed the requirements of part 7080.2150 , subpart 2; D. meet the requirements of part 7080.2150 , subpart 3, except as modified in this part; E. meet the requirements of Table XI in subpart 2; and F. meet soil dispersal requirements of parts 7080.2210 , 7080.2220 , and 7080.2230 , except that the reductions in part 7080.2210 , subpart 3, item B, are not applicable. Subp. 2. Table XI. TABLE XI TREATMENT COMPONENT PERFORMANCE LEVELS AND METHOD OF DISTRIBUTION BY TEXTURE GROUP 1 Vertical separation (inches) Texture group 2 All sands and loamy sands Sandy loam, loam, silt loam Clay, clay loams _ 12 to 17 3 Treatment level A Uniform distribution Timed dosing Treatment level A Uniform distribution Timed dosing Treatment level A Uniform distribution Timed dosing 18 to 35 3 Treatment level B Uniform distribution Timed dosing Treatment level B Uniform distribution Timed dosing Treatment level B Uniform distribution 36+ 3 Treatment level A-2 or B-2 Uniform distribution Treatment level C Treatment level A-2 or B-2 Uniform distribution Treatment level C Treatment level A-2 or B-2 Uniform distribution Treatment level C 1 The treatment component performance levels correspond with those established for treatment components under the product testing requirements in Table III in part 7083.4030 . 2 With less than 50 percent rock fragments. 3 Additional vertical separation distance is required as determined in part 7080.2150 , subpart 3, item C, subitem (1), unit (b). Subp. 3. Soil loading rates. The absorption area and mound absorption ratio must be sized according to Table IX or IXa.