CART CART-01 Revision 0 Page | 14 0 30 55 70 6.83 84 2 70 100 120+ 6.74 34 4 75 110 120+ 6.62 31 6 100 120 120+ 6.52 27 8 80 110 120+ 6.41 30 10 60 90 110 6.10 51 Superfloc Aluminium Dose (mg/L) Clarity (mm) after 5mins Clarity (mm) after 30mins Clarity (mm) after 60mins Final pH after 60mins Final Turbidity after 60mins 0 30 55 70 6.83 84 2 65 90 100 6.77 52 4 55 90 110 6.68 39 6 60 80 120 6.55 35 8 50 65 105 6.49 49 10 40 60 70 6.28 95 4 Discussion The most efficient dose rate achieves the best balance between settlement response, pH response and cost of chemical throughout the duration of the Project. The soil samples generally retained persistently mobile fine colloidal particles and had variable clarity and turbidity responses. In most cases the coagulants provided significant improvement of clarity and turbidity compared to the control. Both PAC and Superfloc provided consistent rates of settlement for the soil types Control 2mg/L 4mg/L 6mg/L 8mg/L 10mg/L Control 2mg/L 4mg/L 6mg/L 8mg/L 10mg/L
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