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<br />grading of 1,309,000 square feet of area. Assuming grading of <br />the entire project site, approximately 130,680 square feet of <br />area would be graded. The proposed grading would be considerably <br />less than the threshold of significance established by the CEQA <br />Air Quality Handbook. To minimize dust impacts during <br />construction, the proposed project would be subject SCAQMD <br />Fugitive Dust Rule 403. To insure compliance with Fugitive Dust <br />Rule 403 the following mitigation measure shall be implemented. <br /> <br />Mitigation Measure <br /> <br />. During construction, the contractor would be required to <br />comply with SCAQMD Fugitive Dust Rule 403 to suppress dust <br />generated by construction operations. To ensure compliance <br />with SCAQMD Fugitive Dust Rule 403, grading plans and <br />construction plans for the proposed proj ect shall reflect <br />the following notes: <br /> <br />1. All material excavated or graded will be sufficiently <br />watered to prevent excessive amounts of dust. <br />Watering with complete coverage shall occur at least <br />twice daily, once in the late morning and once after <br />work is done for the day. <br /> <br />2 . <br /> <br />All clearing <br />during period <br />averaged over <br />smog episodes. <br /> <br />and earthwork activities shall cease <br />of high winds (winds greater than 25 mph <br />one hour) or during Stage 1 or Stage 2 <br /> <br />3. Streets surrounding the project site should be cleaned <br />at the end of each day of construction. <br /> <br />4. <br /> <br />All material transported offsite shall <br />sufficiently watered or securely covered <br />excessive amounts of dust. <br /> <br />either be <br />to prevent <br /> <br />5. The amount of area disturbed by clearing and earthwork <br />activities shall be minimized at all times. <br /> <br />6. <br /> <br />Equipment engines shall be <br />condition and in proper <br />manufacturer's specifications. <br /> <br />maintained in <br />tune according <br /> <br />good <br />to <br /> <br />7. <br /> <br />To the extent <br />shall be used <br />activities. <br /> <br />feasible, gasoline powered equipment <br />for onsite and offsite construction <br /> <br />9 <br /> <br />7SA,.,39 <br />