Common use of Test Matrix Clause in Contracts

Test Matrix. Table 3-1 presents the sampling and analytical matrix to be used at the MHF Test. Emissions/Offgas sampling shall be at the * sampling location. Offgas grab samples will be taken and analyzed by an Independent Lab. Sampling/testing will not be initiated until the start-up procedures have been completed and MHFs have stabilized at the desired production rate for the test. Exhibit 10.50(b) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Exhibit 10.50(b) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008

Test Matrix. Table 3-1 presents the sampling and analytical matrix to be used at the MHF Test. Emissions/Offgas sampling shall be at the * sampling location. Offgas grab samples will be taken and analyzed by an Independent Lab. Sampling/testing will not be initiated until the start-up procedures have been completed and MHFs have stabilized at the desired production rate for the test. Exhibit 10.50(b10.50(c) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008 * * * * * * * * * * * * * * * * * * * * 8 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Exhibit 10.50(b10.50(c) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008

Test Matrix. Table 3-1 presents the sampling and analytical matrix to be used at the MHF Test. Emissions/Offgas sampling shall be at the * sampling location. Offgas grab samples will be taken and analyzed by an Independent Lab. Sampling/testing will not be initiated until the start-up procedures have been completed and MHFs have stabilized at the desired production rate for the test. Exhibit 10.50(b10.50(a) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Exhibit 10.50(b10.50(a) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008

Test Matrix. Table 3-1 presents the sampling and analytical matrix to be used at the MHF Test. Emissions/Offgas sampling shall be at the * sampling location. Offgas grab samples will be taken and analyzed by an Independent Lab. Sampling/testing will not be initiated until the start-up procedures have been completed and MHFs have stabilized at the desired production rate for the test. Exhibit 10.50(b10.50(d) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Exhibit 10.50(b10.50(d) to Form 10-Q for the Quarter Ended September 30, 2008 filed by ADA-ES, Inc. (File No. 000-50216) on November 7, 2008