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5.11 Air Resources

of disturbed surface area or any earth-moving operation with a daily earth-moving or
throughput volume of 3,850 cubic meters (5,000 cubic yards) or more 3 times during the
most recent 365 day period” (SCAQMD 1976b). Grading of the Project would be considered
a Large Project under Rule 403. Therefore, the Project shall be required to implement the
applicable actions specified in Table 2 of the Rule, which is included in EIR Appendix 5.11-D.
As a Large Operation, the Project shall also be required to do the following:

• Submit a fully executed Large Operation Notification (SCAQMD Form 403N) to the
SCAQMD Executive Officer within 7 days of qualifying as a large operation.
• Include, as part of the notification, the name(s), address(es), and phone number(s) of
the person(s) responsible for the submittal, and a description of the operation(s),
including a map depicting the location of the site.
• Maintain daily records to document the specific dust-control actions taken, maintain
such records for a period of not less than three years, and make such records available
to the Executive Officer upon request.
• Install and maintain Project signage with Project contact information that meets the
minimum standards of the Rule 403 Implementation Handbook, prior to initiating
any earth-moving activities.

• Identify a Dust-Control Supervisor that is employed by or contracted with the
Property Owner/Developer; is on the site or available on site within 30 minutes
during working hours; has the authority to expeditiously employ sufficient dust
mitigation measures to ensure compliance with all Rule requirements; and has
completed the AQMD Fugitive Dust Control Class and has been issued a valid
Certificate of Completion for the class.

• Notify the SCAQMD Executive Officer in writing within 30 days after the site no longer
qualifies as a large operation.

Further, SCAQMD Rule 403 requires that that the Project not “allow track-out to extend
25 feet or more in cumulative length from the point of origin from an active operation”
(SCAQMD 1976b). All track-out from an active operation is required to be removed at the
conclusion of each workday or evening shift. Any active operation with a disturbed surface
area of 5 or more acres or with a daily import or export of 100 cubic yards or more of bulk
materials must utilize at least one of the measures listed in Table 3 of SCAQMD Rule 403 at
each vehicle egress from the site to a paved public road.

Rule 403 measures include regular watering of active grading areas and unpaved roads,
limiting vehicle speeds on unpaved surfaces, stabilizing stockpiled earth, and curtailing
grading operations during high wind conditions. Watering of active grading areas is included
in the CalEEMod emissions analysis and results in reduced PM10 and PM2.5 emissions. It
should be noted that some Project requirements and features, such as watering grading
areas, although required Project elements, are shown in the CalEEMod format as mitigation
measures.

R:\Projects\PAS\CEN\000306\Draft EIR\5.11 Air Resources-051117.docx 5.11-42 Centennial Project
Draft EIR