exhibit 10. 15 the associated general contractors of america standard form of design - build agreement and general conditions between owner and contractor table of articles 1. agreement 2. general provisions 3. contractor ’ s responsibilities 4. owner ’ s responsibilities 5. subcontracts 6. contract time 7. contract price 8. changes in the work 9. payment 10. indemnity, limitation of liability, insurance and waiver of subrogation 11. termination of the agreement and owner ’ s right to perform contractor ’ s responsibilities 12. dispute resolution 13. miscellaneous provisions 14. existing contract documents 15. other contingencies 1. 1. agreement agreement 2. 2. general provisions general provisions 3. 3. contractor ’ s responsibilities contractor ’ s responsibilities 4. 4. owner ’ s responsibilities owner ’ s responsibilities 5. 5. subcontracts subcontracts 6. 6. contract time contract time 7. 7. contract price contract price 8. 8. changes in the work changes in the work 9. 9. payment payment 10. 10. indemnity, limitation of liability, insurance and waiver of subrogation indemnity, limitation of liability, insurance and waiver of subrogation 11. 11. termination of the agreement and owner ’ s right to perform contractor ’ s responsibilities termination of the agreement and owner ’ s right to perform contractor ’ s responsibilities 12. 12. dispute resolution dispute resolution 13. 13. miscellaneous provisions miscellaneous provisions 14. 14. existing contract documents existing contract documents 15. 15. other contingencies other contingencies this agreement has important legal and insurance consequences. consultation with an attorney and insurance consultant is encouraged with respect to its completion or modification. standard form of design - build agreement and general conditions between owner and contractor article 1 agreement this agreement is made this day of may in the year 2008, by and between the owner blackhawk biofuels, llc ( name and address ) 22 south chicago street freeport, il 61032 and the contractor reg construction & technology group, llc ( name and address ) 416 s bell avenue, po box 888 ames, ia 50010 for services in connection with the following ( the “ project ” ) : project upgrades to existing 45 million gallon / year biodiesel plant located in danville, illinois. notice to the parties shall be given at the above addresses. article 2 general provisions 2. 1 team relationship. the owner and the contractor agree to proceed with the project on the basis