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8. A publicly �isible sign shall be pasted with the te�ephone number and <br /> person ta contact at the lead agency r�gardir�g dust compfaints. This person <br /> shal! respor�d and take oorrecti�e action within 48 hours.The Air District`s phone <br /> number shall also be �isi�le to help ensure corrtpliance with applicable <br /> regulations. <br /> b Additianal Constructior� Measures for Construction Activities With <br /> Emissions Above BAAQMD Thresholds: <br /> 9. All exposed surfaces shall be watered at a frequency adequate to maintain <br /> minimum soil moisture of 12 percent. Maisture content can be verified �y lab <br /> samples or moisture probe. <br /> 10. All excavation, grading, andlor demoiition acti�ities shafl be suspended <br /> when a�erage wind speeds exceed 20 mph. <br /> 11. �nd breaks (e.g., trees, fences) shall be installed on the windward side(s) <br /> of ac#ively disturbed areas of construction. Wind breaks should have at maximum <br /> 50 percent air porosity. <br /> 12. Vegetative ground cover (e.g., fast-gefminating native grass seed) shall be <br /> pEanted in disturbed areas as soon as possible and watered appropriately unti! <br /> vegetation is established. <br /> 13. The sim�ltaneo�s occurrence of excavation, grading, �nd ground-disturbing <br /> canstructio� activities on the same area at any one time s�all be limited. <br /> Acti�ities shall be phased ta reduce the amount of disturbed surfaces at any ane <br /> time. <br /> 14. AI! trucks and equipment, including their tires, shafl be washed off prior to <br /> leaving the site. <br /> 15. 5ite accesses to a distance of 100 feet from the paved road shalE be treated <br /> with a 6--to 12-inch compacted layer of wood chips, mulch, or gravef. <br /> 18. Sandbags or other erosion contral measur�s shall be installed to prevent <br /> silt runofFto public roadways from sites with a slope greater than one percent. <br /> 17. The idling time of d�esel-powered canstruction equiprnent shall be limited to <br /> two minutes. <br /> 18. The projec# shall de►►elop a pfar� demonstrating that the off-road equipment <br /> (mare than 50 horsepower) to be used in the construction project (i.e., owned, <br /> leased, and subcontractor vehicles) would achieve a project-wide fleet-a�erage <br /> 20 percent NOx reduction and 45 percent PM reductifln compared to the most <br /> recent ARB fleet average. Acceptable options for reducing emissions include the <br /> use of late-model engines, low-emission diesel products, alternative fuels, engine <br /> retrofit technology, after-treatment products, add-on devices such as particujate <br /> filters, ar�dlor other options as they become a�ailable. <br /> ATTYIRE50.z89$/PC RE50 REC�MMENDING 5TANFORD ElR CERTIFICATlON <br /> REV;08-15-13 VR <br /> Page 30 of 56 <br />