1. Mass Balance of ARP/SSF Biomass Ammonia recycling Fermentation ARP Reactor Soluble sugar Ammonia Washing 100 lb (dry basis) G:36.1 lb X: 21.4 lb O: 7.8 lb L:17.2 lb G: Glucan X: Xylan O:Other sugar L: Lignin Liquid G: 0.5 lb X: 10.1 lb Lignin12.1 lb Residual solid18.0 lb G: 35.6 lb X:10.3 lb Treated stover Hydrolysis Hydrolyzate Glucose 36.1 lb Xylose 18.9 lb SSF Ethanol 25.9 lb Conversion Efficiency: 90.1% glucan & 77.9% xylan conversion at 15 FPU/g of glucan Measured yield from glucan : 2.58 gallons of ethanol Incremental yield from xylan : 1.35 gallons of ethanol Total possible yield : 3.94 gal-ethanol (92% of theoretical yield, G+X) 101.7% mass balance closure (solids + G + X + EtOH + Others) Other sugar is excluded for Ethanol production Others 19.5 lb Residual Sugar 21.1 lb Lignin5.1 lb

2. Mass Balance of ARP (60 FPU/g-glucan) Biomass Ammonia recycling ARP Reactor Soluble sugar Ammonia Washing 100 lb (dry basis) G:36.1 lb X: 21.4 lb O: 7.8 lb L:17.2 lb G: Glucan X: Xylan O: Other sugar L: Lignin Liquid G: 0.5 lb X: 10.6 lb Lignin12.1 lb Residual solid18.0 lb G: 35.6 lb X:10.8 lb Treated stover Hydrolysis Hydrolyzate Glucose 38.2 lb Xylose 20.8 lb Other sugar 7.8 Conversion Efficiency: 95.3% glucan + 85.5% xylan conversion at 60 FPU/g of glucan 100.99% mass balance closure Unhydrolyzed Sugar 5.41 lb Lignin 5.1 lb

3. Mass Balance of ARP (15 FPU/g-glucan) Biomass Ammonia recycling ARP Reactor Soluble sugar Ammonia Washing 100 lb (dry basis) G:36.1 lb X: 21.4 lb O: 7.8 lb L:17.2 lb G: Glucan X: Xylan O: Other sugar L: Lignin Liquid G: 0.5 lb X: 10.6 lb Lignin12.1 lb Residual solid18.0 lb G: 35.6 lb X:10.8 lb Treated stover Hydrolysis Hydrolyzate Glucose 36.1 lb Xylose 18.9 lb Other sugar 7.8 Conversion Efficiency: 90.3% glucan + 77.9% xylan conversion at 15 FPU/g of glucan 101.4% mass balance closure Unhydrolyzed Sugar 9.34 lb Lignin 5.1 lb Enzyme