75A - 3417 W FIFTH STREET - Laserfiche WebLink

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Responses to Environmental Checklist For CEQA Compliance Long-Term Operational Air Quality Impacts The primary source of long-term operational emissions associated with the proposed project would be generated by vehicle travel to and from the project site. A relatively minor amount of gaseous emissions would also occur from natural gas and electricity usage and the operation of outdoor maintenance equipment. The proposed project would add 6,002 square feet of area. According to the South Coast Air Quality Management District CEQA Air Quality Handbook, the proposed area would be less than SCAQMD's threshold of significance, therefore the operational impacts is less than significant. Short-term Constructed Related Air Quality Impacts Construction operations associated with the proposed project could potentially result in short-term increases in particulate matter, and to a lesser degree increases in carbon monoxide and ozone. Peak day construction emissions for most pollutants arising from construction of the proposed project would occur during the grading phase, though pollutants are also expected during the vertical construction, exterior finishing and the installation of landscaping improvements and paving. Using the South Coast Air Quality Management District CEQA Air Quality Handbook as a general guideline, the threshold for potentially significant short-term air quality impacts would involve the grading of 1,309,000 square feet of area. The proposed project would require re-grading of 19,810 square feet of lot area only. The amount of grading activities for the proposed project would be considerably less than the threshold of significance outlined in the CEQA Air Quality Handbook. While the construction related emissions associated with the proposed project would not exceed the thresholds established by the SCAQMD, the emissions could be a nuisance to other existing land uses in the nearby vicinity of the project site. To minimize short-term construction related to air impacts within the project area, the following mitigation measures shall be implemented. MM AQ-1 As required by South Coast Air Quality Management District (SCAQMD) Rule 403- Fugitive Dust, all construction activities that are capable of generating fugitive dust are required to implement dust control measures during each phase of project development to reduce the amount of particulate matter entrained in the ambient air. These measures include the following: ^ Application of soil stabilizers to inactive construction areas ^ Quick replacement of ground cover in disturbed areas ^ Watering of exposed surfaces three times daily ^ Covering all stock piles with tarp ^ Sweep streets adjacent to the project site at the end of the day if visible soil material is carried over to adjacent roads ^ Cover or have water applied to the exposed surface of all trucks hauling dirt, sand, soil, or other loose materials prior to leaving the site to prevent dust from impacting the surrounding areas ^ Install wheel washers where vehicles enter and exit unpaved roads onto paved roads to wash off trucks and any equipment leaving the site each trip MM AQ-2 All clearing and earthwork activities shall cease during period of high winds (winds greater than 25 mph averaged over one hour) or during Stage 1 or Stage 2 smog episodes. 75A-39