Common use of Data Reduction and Summary Clause in Contracts

Data Reduction and Summary. Tables 7-1 and 7-2 show the format to be used to summarize the data. Table 7-1 Summary of Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Test Data – Samples 1 through 24 Method/Component Units Sample 1 Sample 2 Sample 3 Sample 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(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 Table 7-2 Summary of Averaged Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Average Test Data – 1 through 12 Method/Component Units Average 1 Average 2 Average 3 Average 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(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 Attachment 8

Data Reduction and Summary. Tables 7-1 and 7-2 show the format to be used to summarize the data. Table 7-1 Summary of Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Test Data – Samples 1 through 24 Method/Component Units Sample 1 Sample 2 Sample 3 Sample 4 * * * * * * * * * * * * * 8 * * * * * * * 8 * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Table 7-2 Summary of Averaged Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Average Test Data – 1 through 12 Method/Component Units Average 1 Average 2 Average 3 Average 4 * * * * * * * * * * * * * * * * * * 8 * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Attachment 8

Data Reduction and Summary. Tables 7-1 and 7-2 show the format to be used to summarize the data. Table 7-1 Summary of Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Test Data – Samples 1 through 24 Method/Component Units Sample 1 Sample 2 Sample 3 Sample 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Table 7-2 Summary of Averaged Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Average Test Data – 1 through 12 Method/Component Units Average 1 Average 2 Average 3 Average 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Attachment 8

Data Reduction and Summary. Tables 7-1 and 7-2 show the format to be used to summarize the data. Table 7-1 Summary of Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Test Data – Samples 1 through 24 Method/Component Units Sample 1 Sample 2 Sample 3 Sample 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Table 7-2 Summary of Averaged Test Data Red River Environmental Products Activated Carbon Facility Multiple Hearth Furnace Louisiana Method/Component Units Average Test Data – 1 through 12 Method/Component Units Average 1 Average 2 Average 3 Average 4 * * * * * * * * * * * * * * * * * * * * * * * * * * Auxiliary Power Consumption Kilowatts per hour Exhibit 10.50(d10.50(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 Attachment 8