Lehigh Southwest Cement-Issuance of a Modification to the Permit to Operate Rock Plant #3
Summary
SCH Number
2025050347
Public Agency
Bay Area Air Quality Management District
(BAAQMD)
Document Title
Lehigh Southwest Cement-Issuance of a Modification to the Permit to Operate Rock Plant #3
Document Type
NOE - Notice of Exemption
Received
Posted
5/8/2025
Document Description
The Air District's permit action is the issuance of a modification to the Permit to Operate for S-300 (Rock Plant #3 Storage Piles) and the shutdown of S-176 (Rock Plant #1 Storage Piles). In this application, Lehigh proposed to modify 5-300 to account for fugitive emissions associated with hauling material from the quarry to the Portable Rock Plant as part of the Permanente Creek Restoration Project (PCRP). Per the PCRP, Lehigh must remove the material from the existing rock pile permitted as 5-176 and restore portions of the current Portable Rock Plant's haul route with natural vegetation. Lehigh currently uses a facility-wide water spray system equipped with water lines, water spray nozzles, and water trucks to control particulate matter emissions from S-300, so Best Available Control Technology is satisfied.
Contact Information
Name
Sanjeet Sen
Agency Name
Lehigh
Job Title
Senior Environmental Manager
Contact Types
Project Applicant / Parties Undertaking Project
Phone
Name
Eric Grulke
Agency Name
Bay Area Air Quality Management District (Air District)
Job Title
Senior Air Quality Engineer
Contact Types
Lead/Public Agency / Responsible Agency
Phone
Email
Location
Coordinates
Cities
Santa Clara
Counties
Santa Clara
Regions
Citywide, Countywide, San Francisco Bay Area
Cross Streets
Ridgeway Drive
Other Location Info
24001 Stevens Creek Blvd, Cupertino, Santa Clara County, CA 95014
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
This project is categorically exempt per the Class 1 Alteration - per CEQA Guidelines Section 15301.
Reasons for Exemption
This permit application is categorically exempt from CEQA. CEQA Guidelines, Section 15301, exempts projects that involve negligible or no expansion of use. To ensure all fugitive dust emissions associated with the Portable Rock Plant are permitted upon the implementation of the PCRP, Lehigh proposes to modify S-300 to include the road dust entrainment and drop point emissions previously associated with S-176. There will be no changes to the storage piles associated with S-300. S-300 continues to have the same operating schedule, and the
throughput rates remain the same. The application did not involve any changes resulting in capacity increases, or changes to upstream or downstream equipment that would result in any increases in capacities or emissions (other than fugitive component emissions at S-300).
The modification will not expand the facility's normal operation and will result in no increase or only a negligible increase in use of the facility. Further, based on the review of the permit application materials, including
Appendix H, environmental information form, the project will not have any significant environmental impacts, and cumulative impacts from successive projects of the same type in the same place will not result in significant environmental impacts. The changes did not result in increased capacities or emissions from any source, except fugitive emissions from S-300. These additional fugitive emissions do not debottleneck S-300 or any other
source at this facility. Accordingly, approval of Application 709175 is not subject to CEQA review.
County Clerk
Santa Clara
Attachments
Notice of Exemption
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