Rule 610c.
Table 1 Step 1 required removal of TOC by enhanced coagulation and enhanced softening for subpart H supplies usingconventional filtration A,B
Source-water |
Source-water TOC, mg/l | alkalinity, mg/l as calcium carbonate | ||
0-60 | >60-120 | >120C | |
>2.0-4.0 | 35.0% | 25.0% | 15.0% |
>4.0-8.0 | 45.0% | 35.0% | 25.0% |
>8.0 | 50.0% | 40.0% | 30.0% |
A Supplies meeting at least 1 of the conditions in subrule (1) (b) (i) to (vi) of this rule are not required to operate with enhanced coagulation.
B Supplies with softening systems meeting 1 of the alternative compliance criteria in subrule (1) (c) of this rule are not required to operate with enhanced softening.
C Supplies practicing softening shall meet the TOC removal requirements in this column.
Table 2 Enhanced coagulation step 2 target pH
Alkalinity (mg/l as calcium carbonate) | Target pH |
0-60 | 5.5 |
>60-120 | 6.3 |
>120-240 | 7.0 |
>240 | 7.5 |
Mich. Admin. Code R. 325.10610c