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ARROYO LAGO RESIDENTIAL PROJECT ADDENDUM FCS 81 Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480036/Addendum/21480036 Arroyo Lago Residential Project Addendum.docx • All exposed nonpaved surfaces (e.g., parking areas, staging areas, soil piles, graded areas, and access roads) shall be watered at least two times per day and/or non-toxic soil stabilizers shall be applied to exposed nonpaved surfaces. • All haul trucks transporting soil, sand, or other loose material off-site shall be covered and/or shall maintain at least 2 feet of freeboard. • All visible mud or dirt tracked out onto adjacent public roads shall be removed using wet power vacuum street sweepers at least once per day. The use of dry power sweeping is prohibited. • All vehicle speeds on unpaved roads shall be limited to 15 miles per hour. • All roadways, driveways, and sidewalks to be paved shall be completed as soon as possible. Building pads shall be laid as soon as possible after grading unless seeding or soil binders are used. • Idling times shall be minimized either by shutting equipment off when not in use or reducing the maximum idling time to 5 minutes, as required by the California Airborne Toxics Control Measure (ATCM) Title 13, Section 2485 of California Code of Regulations. Clear signage regarding idling restrictions shall be provided for construction workers at all access points. • All construction equipment shall be maintained and properly tuned in accordance with the manufacturer’s specifications. All equipment shall be checked by a certified mechanic and determined to be running in proper condition prior to operation. • The prime construction contractor shall post a publicly visible sign with the telephone number and person to contact regarding dust complaints. The construction contractor shall take corrective action within 48 hours. The Bay Area Air District’s and the County’s phone numbers shall also be visible to ensure compliance with applicable regulations. Implementing Measure for MM AIR-1 Upon annexation of the proposed project into the City of Pleasanton (City), the applicant shall update the publicly visible sign required by MM AIR-1 to display the City’s phone number in place of the County’s phone number. The sign shall include the contact person for dust complaints and the Bay Area Air District’s phone number, as required. The applicant shall ensure that all Bay Area Air District Best Management Practices (BMPs) for dust control listed in MM AIR-1 are incorporated into the construction plans and implemented during construction and shall submit these plans to the City for approval prior to construction. MM AIR-3 The following measure shall be implemented during mass grading, paving, and building construction phases of construction to reduce potential exposure of diesel particulate matter (DPM) and particulate matter less than 2.5 micrometers in diameter (PM2.5) emissions to nearby sensitive receptors: