Laserfiche WebLink
Appendix A-2: Earthmoving Activity Model Input Parameters and Dust Emissions Calculations <br />Overview <br />Summary of Earthmoving Activity <br />Existing Project Existing Project <br />02-035 623 Scraper Grading Scrapers 624 728 54 63 <br />04-971 JD Grader Grading Graders 104 156 4 13 <br />2025-26 CAT 623 Scraper Grading Scrapers 0 1,000 0 86 <br />Existing Project <br />04-075 JD 850C Dozer Bulldozing Rubber Tired Dozers 728 780 <br />10-020 CAT D8 Dozer Bulldozing Rubber Tired Dozers 2,184 2,288 <br />18-075 JD 850K Dozer Bulldozing Rubber Tired Dozers 1,144 1,248 <br />20-020 JD 1050K LARGE DOZER Bulldozing Rubber Tired Dozers 2,080 2,184 <br />2025 CAT LPG D-6 Finish Dozer Bulldozing Rubber Tired Dozers 0 2,500 <br />2025-26 Large Dozer Bulldozing Rubber Tired Dozers 0 2,250 <br />Assumptions <br />Square feet per acre (C1)43,560 <br />Feet per mile (C2)5,280 <br />Acres graded per hours for scrapers (As) 0.125 South Coast Air Quality Management District Construction Survey <br />Acres graded per hours for graders (As) 0.0625 South Coast Air Quality Management District Construction Survey <br />Blade width (ft) of grading equipment (Wb)12 CalEEMod default <br />Equation: <br />Vehicle Miles Travelled (VMT) = Hours operation * As / Wb * C1 / C2 <br />Information about grading and bulldozing activities was provided by the project applicant. Emissions of fugitive dust from earthmoving activities were estimated using emissions factors from the <br />U.S. Environmental Protection Agency's Compilation of Air Pollutant Emissions Factors (AP-42), Section 11.9 Western Surface Coal Mining and guidance from the California Emissions Estimator <br />Model (CalEEMod) version 2022.1.1. <br />Annual Hours of Operation Annual VMT <br />Project Equipment Activity <br />CalEEMod Equipment <br />Category <br />Project Equipment <br />CalEEMod Equipment <br />CategoryActivity <br />Annual Hours of Operation <br />Attachment A CAP Emission Calculations Page 11 of 30