A multiple layer test card comprising: a waste channel to receive biological waste liquid from an area of the test card utilized for testing biological samples; multiple waste storage compartments (310, 315, 320) arranged adjacently in succession in a waste layer of the test card, each of the adjacent waste storage compartments (310, 315, 320) being separated by a rib (325, 330) in the waste layer, and a first waste storage compartment in the succession receiving biological waste liquid from the waste channel; a keying feature to orient the test card with respect to test equipment and to gravity; multiple passes (420, 425) to pass waste liquid and air sequentially through multiple rib separated waste storage compartments (315, 320) in the waste storage layer, the passes (420, 425) comprising: a bottom pass between each of the adjacent waste storage compartments (310, 315, 320) to pass biological waste liquid between adjacent waste storage compartments (310, 315, 320), wherein the bottom pass exits an upstream waste storage compartment at a bottom of the waste storage compartment and enters a downstream waste storage compartment at a bottom of the waste storage compartment with respect to gravity; and a top pass between each of the adjacent waste storage compartments (310, 315, 320) to pass air between adjacent waste storage compartments (310, 315, 320), wherein the top pass exits an upstream waste storage compartment at a top of the waste storage compartment and enters a downstream waste storage compartment at a top of the waste storage compartment with respect to gravity; and a vent in a last waste storage compartment in the succession to provide an air exit from the test card. a waste channel to receive biological waste liquid from an area of the test card utilized for testing biological samples; multiple waste storage compartments (310, 315, 320) arranged adjacently in succession in a waste layer of the test card, each of the adjacent waste storage compartments (310, 315, 320) being separated by a rib (325, 330) in the waste layer, and a first waste storage compartment in the succession receiving biological waste liquid from the waste channel; a keying feature to orient the test card with respect to test equipment and to gravity; multiple passes (420, 425) to pass waste liquid and air sequentially through multiple rib separated waste storage compartments (315, 320) in the waste storage layer, the passes (420, 425) comprising: a bottom pass between each of the adjacent waste storage compartments (310, 315, 320) to pass biological waste liquid between adjacent waste storage compartments (310, 315, 320), wherein the bottom pass exits an upstream waste storage compartment at a bottom of the waste storage compartment and enters a downstream waste storage compartment at a bottom of the waste storage compartment with respect to gravity; and a top pass between each of the adjacent waste storage compartments (310, 315, 320) to pass air between adjacent waste storage compartments (310, 315, 320), wherein the top pass exits an upstream waste storage compartment at a top of the waste storage compartment and enters a downstream waste storage compartment at a top of the waste storage compartment with respect to gravity; and a bottom pass between each of the adjacent waste storage compartments (310, 315, 320) to pass biological waste liquid between adjacent waste storage compartments (310, 315, 320), wherein the bottom pass exits an upstream waste storage compartment at a bottom of the waste storage compartment and enters a downstream waste storage compartment at a bottom of the waste storage compartment with respect to gravity; and a top pass between each of the adjacent waste storage compartments (310, 315, 320) to pass air between adjacent waste storage compartments (310, 315, 320), wherein the top pass exits an upstream waste storage compartment at a top of the waste storage compartment and enters a downstream waste storage compartment at a top of the waste storage compartment with respect to gravity; and a vent in a last waste storage compartment in the succession to provide an air exit from the test card.