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Table A2. Stage Specific Risks and Mitigation Qin < . Coordinate with IRFWCD to suspend pump- ing during heavy periods of herbicide spray- Herbicides/Toxins/Heavy ing. Metals in water impact sys- tem, biomass quality Evaluate pre-settling/clarifiers, filtration meth- ods and/or chemical precipitation to remove toxins 1. Site selection, Increase hydraulic detention times in floating preliminary wa- Suspended solids difficult to plant modules, modify tanks with weirs to as- ter testing,con- settle, lack of settled material sist with settling struction of pilot for analysis Install clarifier prior to floating aquatic plant module. Re-allocate funds to provide renewable power Available sites distant from (solar) to power pilot. electrical connections, Unex- pected construction diffi- Reduce number of parallel test systems to culties/costs three; allocate funds to cover increased costs site y Analyze tissues to identify micronutrient defi- ciencies, adjust module order/species as re- Poor growth/health of aquatic quired. plants in modules across pilot Remove impacted modules, evaluate reduced IIII 2. Pilot Testing module treatment system I Stage 2 Y p If health is deleterious) impacted b settled ( Floating plants exhibit differ- Y ential health between serial solids, pre-settle solids with lamella clarifier i tanks (eg., plant health better/ If plant health is improved by nutrients in sol- i worse in tank with settled sol- ids, re-plumb so both.floating plant tanks re- 4 ids) _ ceive water in parallel_(not in serial)_ 'Optimal' plants show season- vaSupplement plants in impacted modules with al variability in health and nu- al removal different species; conduct'mixed' community experiments 3. Pilot Testing Modules show low/no nutrient Stage 3:Optimal removal Remove or reorder modules plants Unexpected module specific water chemistry impacts (eg , Re-order, remove or reconfigure modules effluent from emergent mod- ule is very low DO)