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TABLE 4.. DUST CONTROL REQUIRED MEASURES I. During clearing, grading, earth moving or excavation: a. Water trucks or sprinkler systems to be used in sufficient quantities to prevent dust raised from leaving the site. b. The entire area of disturbed soil to be wet down, sufficient to create a crust, after each day's activities cease. II. After clearing, grading, earth moving or excavation is completed: a. The entire area of disturbed soil is to be treated to prevent wind pick up of the soil. This may be accomplished by: 1. Seeding and watering until grass cover is grown. 2. Spreading soil binders. 3. Wetting the area down, sufficient to form a crust on the surface with repeated soakings as necessary to maintain the crust and prevent dust pick up by the wind. 4. Other methods approved in advance by the Air Pollution Control District. III. During Construction: a. Water trucks or sprinkler systems to be used to keep all areas of vehicle movement damp enough to prevent dust raised from leaving the site. 1. As a minimum, this will include wetting down such areas in the late morning and after work is completed for the day. 2. Increased watering frequency will be required whenever the wind speed exceeds 15 mph. b. All roadways, driveways, sidewalks, etc., should be paved as soon as possible. In addition, building pads should be laid as soon as possible after grading unless seeding or soil binders are used. IV. Activation of Increased Dust Control Measures: The contract of builder shall designate a person or persons to monitor the dust control program and to order increased watering, as necessary, to prevent transport of dust off site. Their duties shall include holiday and weekend periods when work may not be in progress. The name and telephone number of such persons shall be provided to the Air Pollution Control District. Source: San Francisco Bay Area Air Quality Management District, 1983. 13.4-4