Exhibit CC 02-21-2017 Oral Communicationsl •1v. Booster Fan I Dampers
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® A new axial fan located between the new manifold and the stack will
provide the additional energy required to move the exhaust gases
through the new system.
@ Final design of the fan will be submitted with the building permit
package, preliminary specifications are: 110" diameter, A-36 carbon
steel, 700hp. _,,,,_,
® The fan will be controlled with a latest technology variable frequency
drive (VFD) for maximum energy efficiency.
~ All connections between the new and existing vent system will
include an automated damper for maximum energy efficiency.
· .. ;: ... Gas Flow
Existing Baghouse New Manifold
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·Det 17th,.2.013 PERMANENTE -KIin Vent System Replacemc:nt"
·,. Page .12 · Santa Clora Cau11ty-B.i//d/ng P~rm/tPre-Aµphcation '.4eet;ng
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/I . ',) ,i\') D. No significant, unmitigated adverse public health, safety and environmental
l{ effects of proposed development;
I
The project is exempt under Class 1 and Class 2 of the CEQA Guidelines.
Furthermore, no significant environmental impacts were identified in the initial
study. The project is specifically proposed to meet new BAAQMD standards from
improved dispersion of emissions, which will ultimately improve air quality .
E. No adverse effect of the development on flood control, storm drainage, and
surface water drainage;
No new impervious surfaces will be created and facilities will not be placed within
any drainage features.
F. Adequate existing and proposed fire protection improvements to serve the
development;
Fire protecti-·on wafer supply as well as fire emergency access is already available~1-1 -, _ -
the site and no expansion of th es e faciliti es is required. ; , . . ){ f .-~:·"~~::=::q::: :::~:::, ;o· the Counfy
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will be no significant increase in the noise level of the existing plant as a result of this l
new exhaust configuration because no change in cement plant capacity, output or i
operation will occur . _ . ,."' j
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H. Conformance with zoning standards. Standards applicable to non-residential
uses may be varied by the ASA committee to promote excellence of
development, provided that the deviation from standards will better
accomplish the purposes of this chapter.
The cement plant is a conforming use within the A -dl zoning district, with
modifications to accommodate air pollution control equipment subject to securing
Architecture and Site Approval. The proposed stacks will replace existing emissions
equipment with taller stacks to improve atmospheric dispersion of emissions, to
comply with BAAQMD 1s 1'Hot Spots program" and a September 2013 compliance
-~greement _be~een Lehigh and BAAQMD. The project wil_l replace the existing 34
stacks with a freestanding single stack 295 feet in height and 15 feet in diameter, and
install a seconri'smaller stack to exhaust gases related to the clinker cooler system of
116 feel : in height and 7 feet in diameter replacing ten stacks. The proj ect area is
Archll-ecture & Site Plan Review
April 3, 2014
File 9989-16-65-14A
5
II. Actions Concerning the Project Proposal
Approve the Architecture and Site Approval for replacement of em1ss1ons
control equipment (stacks) to comply ·with air emissions requirements of the Bay
Area Air Quality Management Dishict (BAAQMD) subject to the conditions
outlined in Exhibit A.
REASONS FOR RECOMMENDATION
Reasons for Recommended Actions Concerning Environmental
Determination
1his project has been reviewed in accordance with the California Environmental
Quality Act (CEQA) and Staff has determined that Class 1 (CEQA Guidelines
15301 -"Existing Facilities") and Class 2 (CEQA Guidelines 15302 -
"Replacement or Reconstruction") exemptions are applicable to the project. The
Class 1 exemption applies because the addition of the two new stacks entails a
minor alteration to an existing facility to comply · with BAAQMD emissions
requirements and will not increase production capacity (Guidelines 15301(£).)
Also, the project is exempt pw·suant to the Oass 2 exemption ("replacement") as
the new stacks replace portions of existing stack equipment currently used to
vent emissions from the plant (Guidelines 15302). The project ·will enable the
Applicant to continue its operation of the Plant with no change in production
capacity or use.
rr he project does not present any unusual circumstances that could result in L significant environmental effects (CEQA Guidelines 15300.2). The project
proposes installation of ventilation equipment that is typical of similar
operations across the nation. Emissions are produced in the cement
manufacturing process and elevating the venting of emission with tall stacks
more widely disseminates emissions. The visual simulations demonstrate that
the new stacks would not result in a significant visual impact due to placement
of the stacks· contiguous to the cement plant the stacks will blend in with existing
views of the cement plant. The proposed stacks are located within a heavy
industrial setting and will be compatible with the surrounding cement plant
structmes .. which indu_de a pre-heater tower and other industrial features . of
similar height and visual profile as the proposed stacks.
3
Architecture & Site Plan Review
April 3, 2014
File 9989-16-65-14A
1.1 Project Authorization
Kiln / Mill and Cooler Vent Filter Modernization -Cupertino , California
PSI Project No . 575-372 -1
January 5, 2012
Page 1
1.0 PROJECT INFORMATION
Professional Service Industries, Inc . (PSI) is pleased to submit our Geotechnical Engineering
Services Report for the Kiln/Mill and Cooler Vent Filter Modernization project at the Lehigh
Southwest Cement Company plant in Cupertino, California. Our work was performed in general
accordance with our Proposal Number 575-58830, dated December 7, 2011. Our services
were authorized by Mr. Kyle Krick of Lehigh Cement Company , LLC by issuing a Purchase
Order (PO# 4500481996, dated December 12, 2011) in response to our proposal.
1.2 Site Location and Description
The Kiln/Mill and Cooler Vent Filter Modernization project is located within the Lehigh
Southwest Cement Company plant, referenced by a street address of 24001 Stevens Creek
Road in Cupertino, California (see Figure 1 -Site Location Map). Topography at the plant
generally consists of moderately to steeply-sloped terrain with rounded ridges and drainages .
Elevations in the project area range from about 600 feet above mean sea level (msl) at the
Clinker Cooler to about 700 feet msl in the Kiln/Mill dust collector (Google Earth , 2012). This
generally agrees with the Cupertino Quadrangle , California topographic map (USGS , 1991 ).
The locations of the existing and proposed improvements are shown on the attached Figure 2 .
1.3 Project Understanding
Based on your request for proposal (RFP No . 1-0333-00099-2) dated December 5, 2011, PSI
understands that the Lehigh Southwest Cement Company proposes to construct stack and
ductwork supports for its filters. A free-standing stack or new support bent for ductwork is
planned for the Kiln/Mill Dust Collector (KMDC) and a new free-standing exhaust stack is
planned for the Clinker Cooler Dust Collector (CCDC). To assist in this report, we were
provided with a scaled site plan , conceptual drawings and preliminary layout plans of the
proposed improvements. We understand that the Kiln/Mill and Cooler Vent Filter Modernization
will consist of foundations for the following items:
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• KMDC fans and 1,000 hp motors (2) with dead load of 86 kips each .
• KMDC exhaust stack and duct support structures with dead loads of 132 and 145 kips .
• CCDC fan and 600 hp motor with dead load of 44 kips.
• CCDC exhaust stack with dead load of 50 kips .
The approximate locations of the proposed improvements are shown on Fig ~r~·
Based on a review of the provided information, it appears that final grades will be close to
existing . We assume that cuts and fills will be limited to 2 feet. Should any of the above
information or assumptions made by PSI be inconsistent with the planned construction, we
request that you contact us immediately to allow us to make any necessary modifications to our
recommendations .
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