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→Concentrated underground flow
==Concentrated underground flow==
==Concentrated underground flow==
This type of pretreatement is dominated by proprietary systems, some of which have undergone verification under the [http://etvcanada.ca/ Environmental Technology Verification (ETV)] program.
This type of pretreatement is dominated by proprietary systems, some of which have undergone verification under the [http://etvcanada.ca/ Environmental Technology Verification (ETV)] Canada program.
{|class="wikitable"
{|class="wikitable"
!style="width: 10%;"|Type
!style="width: 10%;"|Type
!style="width: 40%;"|Description
!style="width: 40%;"|Description
!style="width: 25%;"|ETV verified products
!style="width: 25%;"|ETV Canada verified products
!style="width: 25%;"|Other products (not verified)
!style="width: 25%;"|Other products (not verified)
|-
|-