City Council and Authorities Concurrent
February 20, 2024

Nevertheless, large numbers of birds are expected to fly through or past the area compared to other areas of the City, and therefore selected bird-safe treatments will be necessary. The assessment identified the following areas of high collision risk: 1) the extensive glazing on floors one to five (i.e., within 60 feet of the ground) of the southern façade located adjacent to the landscape vegetation and 2) feature-related hazards9 (e.g., free-standing glass railings and transparent glass corners) adjacent to the proposed exterior vegetation.

Consistent with mitigation measure BIO-3.1, the project shall be required to include one of the following design alternatives as a condition of project approval.

Condition of Project Approval:

There is potential for bird collisions on floors one to five (i.e., within approximately 60 feet of the ground). Specifically, on floors one and two of the eastern façade and on floors one to five of the southern façade as these areas would be located adjacent to landscape vegetation and would consist of extensive glazing.

9 A feature-related hazard is a potential bird collision hazard that should be treated regardless of whether the building is located near a high-quality bird habitat area.

5185 Lafayette Street (Parcel 11) Project 30 Addendum to Tasman East FEIR City of Santa Clara October 2023
One of the following two alternatives for glazing treatment shall be implemented:

o No more than 10 percent of the surface area of the building façades combined shall have untreated glazing between the ground and 60 feet above ground. The applicant can determine which areas have untreated glazing; however, it is recommended that untreated glazing be minimized on the southern façade (where collision risks would be the highest); or

o No more than 10 percent of the surface area of the southern and eastern building façades outlined in red on Figures 10 and 11 of Appendix B of this document and below shall consist of untreated glazing. This alternative focuses on the areas where collision would be the highest and would provide less flexibility regarding where unglazed treatment would occur.

Any untreated glazed areas (i.e., 10 percent untreated areas) shall be broken up into sections no greater than 24 square feet in size by mullions or bird-safe treatments. With implementation of one of the two design alternatives of this condition of project approval, the project would comply with the requirements listed under mitigation measure BIO-3.1.

Figure 10. On the building 's south fa'rade ,
extensive areas of glazing within 60 feet of
the ground are outlined in red , and areas
immediate ly above and below terraces
with landscape vegetation are outlined in
yellow. These areas should be treated with
a bird-safe treatment.

Figure 11 . On the building 's east fa'rade ,
extensive areas of glaz ing within 60 feet
of the ground are outlined in red. These
areas should be trea ted with a b ird-safe
treatment.

5185 Lafayette Street (Parcel 11) Project 31 Addendum to Tasman East FEIR City of Santa Clara October 2023
Avoid free-standing clear glass walks, skywalks, transparent building corners, glass enclosures (e.g., greenhouses) on rooftops, and balconies with unbroken glazed segments 24 square feet and larger where feasible. If any such structures are included in building designs, all glazing used in any such features will be 100 percent treated.

Free-standing glass railings are proposed on the private balconies and amenity decks. No glass enclosures are proposed. While there are transparent glass corners proposed, the majority of these corners would be small due to the presence of opaque materials adjacent to the corners. The opaque materials would further reduce the potential for bird collisions. As a result, the Avian Collision Assessment concluded that the requirement for 100 percent treatment of transparent building corners was waivable for these smaller corners.

A larger, transparent glass corner would be located at the southeast corner on floors one and two.

Since vegetation would be planted on only one side of this corner, the potential for collisions at this location would be reduced. This corner is included in the areas already identified for treatment in the condition of approval listed above. The assessment concluded that no further treatment of glass corners would be required beyond inclusion of the transparent glass corner on floors one and two at the building’s southeast corner in the treatment area per the condition of project approval mentioned above.

Reduce glass at tops of buildings, especially when incorporating a green roof into the building design.

The eastern and western building façades would consist of extensive opaque materials. While the majority of the façades below the amenity decks proposed on floors six and 21 would have opaque wall panels broken up by small individual windows, some areas above and below the amenity decks would consist of extensive glazing. These areas are outlined in yellow on Figures 10, 12, and 13 of Appendix B of this document and below on page 32 and discussed further below.

Although the northern and southern building façades would be heavily glazed, the overall project design would effectively reduce glazing at the top of the building where roofs with landscape vegetation are present. As a result, the project design would comply with this requirement.

If a green roof or green wall is incorporated into the building design, no more than 10 percent of the surface area of the building’s combined façades within 12 vertical feet above and/or below the green roof or green wall shall have untreated glazing. Any remaining untreated glazed areas will be broken up into sections no greater than 24 square feet in size by mullions or bird-safe glazing treatments.

No green walls are proposed as part of the project; however, the project proposes roofs with landscape vegetation on the sixth and 21st floor amenity decks which would result in bird collisions as the proposed vegetation would attract birds. The façades above and below the sixth and 21st floor amenity terraces would consist of extensive opaque materials that reduce bird collision risk. As discussed previously, the areas outlined in yellow on Figures 10, 12, and 13 of Appendix B of this document and below on page 32 would consist of extensive glazing on the southern façade below the sixth floor amenity terrace. Consistent with mitigation measure BIO-3.1, the project shall be required to include the following condition of project approval.

5185 Lafayette Street (Parcel 11) Project 32 Addendum to Tasman East FEIR City of Santa Clara October 2023
Condition of Project Approval:

• No more than 10 percent of the surface area of these combined façades (as outlined in yellow on Figures 10, 12, and 13 of Appendix B of this document and below) shall have untreated glazing. All remaining untreated glazed areas shall be broken up into sections no greater than 24 square feet in size by mullions and bird-safe glazing treatments

Figure 10. On the building 's south fa<;:ade,
extensive areas of glaz ing within 60 feet of
the ground are out lined in red , and area s
immed iately above and below terraces
with landscape vegetation are outlined in
yellow. These areas should be treated with
a bird-safe treatmen t.

Figure 12. On the building 's north fa<;:ade,
areas immedia tely above and below
terraces with landscape vegetation are
outlined in ye llow. These areas should be
treated with a b ird-safe treatment .

Figure 13. On the bu ilding 's west fa<;:ade,
areas above and below terraces with
landscape vegetat ion are outlined in
yellow. These areas should be treated with
a b ird-safe glazing treatment .

5185 Lafayette Street (Parcel 11) Project 33 Addendum to Tasman East FEIR City of Santa Clara October 2023
With implementation of this condition of project approval, the project would comply with the requirement listed under mitigation measure BIO-3.1.

Avoid the funneling of flight paths between buildings or trees towards a glazed building façade.

The building does not include any features that would funnel birds towards a glazed building façade.

As a result, the project design would comply with this requirement.

Landscaping, including planted vegetation and water features, shall be designed to minimize the potential for collisions. For example, vegetation providing particularly valuable resources to birds (such as fruits) will be planted away from buildings with extensive glazing, and vegetation in general will be planted in such a way that it is not clearly reflected in windows. Water features would be located away from building exteriors to reduce the attraction of birds towards glazed façades.

No water features are proposed besides the pool on the 21st floor. As mentioned previously, vegetation and trees are proposed in the amenity spaces adjacent to building façades. Some of the vegetation is expected to produce food or flowers that would attract birds. Consistent with mitigation measure BIO-3.1, the project shall be required to include the following conditions of project approval.

Conditions of Project Approval:

• All free-standing glass railings adjacent to planted vegetation (i.e., amenity terraces on floors six and 21) shall be 100 percent treated with bird-safe treatment. • Extensive glazing within 60 feet above ground and on the floors above and below the sixth and 21st floor amenity terraces shall be treated with a bird-safe glazing treatment such that no more than 10 percent of the surface area have untreated glazing. • Landscape vegetation with flowers and fruits shall be removed from any planted areas immediately adjacent to untreated glazed areas.

With implementation of the conditions of approval above, the project would comply with this requirement of mitigation measure BIO-3.1.

Minimize exterior lighting to the extent feasible, except as needed for safety. All exterior lights shall be directed toward facilities in the Plan Area (e.g., rather than directed upward or outward) and shielded to ensure that light is not directed outward toward the Guadalupe River or Ulistac Natural Area.

The project’s lighting plan is not yet available. To ensure that the project minimizes exterior lighting to the extent feasible, the project shall comply with the exterior LEED Pilot Credit 55 lighting requirement as follows:

• Exterior building fixtures that are not necessary for safety, building entrances, and circulation shall be automatically shut off from midnight until 6:00 AM. Manual override capability may be provided for occasional after-hour use.

5185 Lafayette Street (Parcel 11) Project 34 Addendum to Tasman East FEIR City of Santa Clara October 2023
• Exterior up-lighting in the project design shall be avoided.

The proposed project is located approximately 1,790 feet west of the Guadalupe River and approximately 1,580 west of the Ulistac Natural Area. The Avian Collision Risk Assessment concluded that unshielded exterior lighting in public areas would not spill outwards into these natural areas. As a result, shielding and direct lighting on-site would not be needed to comply with this requirement.

Occupancy sensors or other switch control devices shall be installed on interior lights, with the exception of emergency lights or lights needed for safety purposes. Exterior shades shall also be considered to reduce light pollution. On commercial buildings, these lights shall be programmed to shut off during non-work hours and between 10:00 PM and sunrise.

As discussed above, the project would comply with the exterior LEED Pilot Credit 55 lighting requirement. Due to the proposed buildings distances from the Ulistac Natural Area and Guadalupe River, and the assumption that residents would not use extensive night lighting, the lack of occupancy sensors within residential spaces would not result in substantial impact on birds. The project design would comply with this requirement.

While full build out of the TESP would have a significant and unavoidable bird strike impact, the proposed project is consistent with the TESP FEIR and, by itself, would not result in any new impacts or substantially increase the severity of the previously identified impact with implementation of the conditions of project approval.

Increased Lighting
As mentioned previously, the project’s lighting plan is not yet available. It is reasonable to assume that the proposed project would include internal building lights, parking garage lights, pathway lights, security lights, and external building lights. While the TESP FEIR identified increased lighting on-site as an impact on bird species in the high value habitat areas on and adjacent to the TESP area, the project site is not located near these habitat areas and is already developed. Due to the project site’s location and consistent with mitigation measure BIO-4.1, exterior lighting within the TESP area will be shielded as needed to block illumination from shining upward, or outward into the Guadalupe River and Ulistac Natural Area. Furthermore, the project would be subject to the City’s architectural review process prior to issuance of building permits, consistent with mitigation measure BIO-4.1, to ensure that the project would not adversely impact bird species. As a result, the proposed project would not result in any new impacts or substantially increase the severity of the previously identified impact.

Trees
A Tree Survey was prepared by Arbor Resources in March 2023.10 The trees are listed in Table 3.3-1 and are shown in the figure below.

10 Arbor Resources. Tree Inventory Table. March 30, 2023.

3.3.2.2 3.3.2.3
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 18
17 16
TREE LOCATION MAP FIGURE 3.3-1
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5185 Lafayette Street (Parcel 11) Project
City of Santa Clara
35 Addendum to Tasman East FEIR
October 2023
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5185 Lafayette Street (Parcel 11) Project 36 Addendum to Tasman East FEIR City of Santa Clara October 2023
Table 3.3-1: Trees Surveyed
Tree
Number Common Name Scientific Name Diameter
(in inches)
1 Crape myrtle Lagerstroemia indica 4, 4, 3, 2, 2
2 Crape myrtle Lagerstroemia indica 7, 4
3 Blackwood acacia Acacia melanoxylon 22
4 Blackwood acacia Acacia melanoxylon 27
5 Chinese elm Ulmus parvifolia 11
6 Chinese elm Ulmus parvifolia 13
7 Chinese elm Ulmus parvifolia 10
8 Chinese elm Ulmus parvifolia 12
9 Chinese elm Ulmus parvifolia 12
10 Mexican fan palm Washingtonia robusta 18
11 Mexican fan palm Washingtonia robusta 18
12 Chinese elm Ulmus parvifolia 13
13 Chinese elm Ulmus parvifolia 19
14 Chinese elm Ulmus parvifolia 8
15 Canary Island pine Pinus canariensis 30
16 Chinese elm Ulmus parvifolia 10
17 Marina madrone Arbutus 'Marina' 5, 4, 4, 3, 3, 3, 2
18 Blackwood acacia Acacia melanoxylon 23

Consistent with mitigation measure BIO-10.2 and General Plan Policy 5.3.1-P10, any tree removed would be required to be replaced at a 2:1 ratio on-site. As proposed, all 18 on-site trees would be removed, and the project would be required to plant 36 new trees. Based on the plans provided by the applicant, the applicant proposes a total of 43 trees on-site, which is consistent with the City’s tree replacement requirement. Therefore, the proposed project would not result in any new tree impacts or substantially increase the severity of the previously identified impact.

3.4 HAZARDS AND HAZARDOUS MATERIALS
The following analysis addresses the potential for soil and groundwater contamination on the project site. Given the age of the buildings in the TESP area, the TESP FEIR concluded that the buildings would likely contain asbestos and/or lead-based paint. Remediation of asbestos and lead-based paint must be in accordance with national regulatory guidelines and Cal/OSHA standards. The regulatory requirements are incorporated by reference and no further analysis is required.

Impacts on airport safety, schools, and emergency operation plans would be the same on all project sites within the TESP area given that the projects would have to be designed consistent with the development standards established by the TESP. The TESP FEIR found impacts to airport safety, schools, and emergency operation plans to be less than significant.

3.4.1 Findings of the Previously Certified FEIR`
Based on the TESP FEIR, the project site historically consisted of agricultural land including row crops and orchards. One leaking underground storage tank (LUST) case was discussed in the TESP FEIR. In addition, four facilities within the TESP area have been identified in the Regional Water

5185 Lafayette Street (Parcel 11) Project 37 Addendum to Tasman East FEIR City of Santa Clara October 2023
Quality Control Board’s (RWQCB) Spills, Leaks, Investigations, and Cleanup (SLIC) database. Of the four on-site facilities, three are currently identified as open cases as discussed below.

Leaking Underground Storage Tank Cases
In 1988, a 2,000-gallon gasoline underground storage tank (UST) was removed from 2200 Calle De Luna. The LUST case has been closed by Santa Clara Valley Water District (SCVWD) as of 1995.

The most recent sampling event found concentrations of total petroleum hydrocarbons as gasoline (TPHg) and benzene at the site.

Spills, Leaks, Investigations, and Cleanup (SLIC) Sites In 1997, RWQCB closed the SLIC case at 2339 Calle Del Mundo, however, residual concentrations of volatile organic compounds (VOCs) remained in the soil and groundwater that pose a potential vapor intrusion concern. The VOC impacted groundwater appears to have migrated below the northerly adjacent landfill property.

VOCs were identified in the groundwater at 2301 Calle De Luna and have migrated below the easterly adjacent parcel at 2281 Calle De Luna. This open SLIC case is currently being overseen by the RWQCB.

The two remaining SLIC cases at 2278 Calle De Luna (Coatek, Inc.) and 2200 & 2222 Calle De Luna (Air Flight Service) are being overseen by the Santa Clara County Department of Environmental Health (SCCDEH). The Air Flight Service property was found to have elevated levels of TPH as diesel (TPHd) that are unrelated to the prior film processing done on the property. The Coatek, Inc. property was found to have elevated nickel and copper concentrations related to the industrial land use activities on the southern portion of the TESP area. Oil, grease, trichloroethene (TCE), TPH as motor oil (TPHmo), hexavalent chromium, and benzene concentrations were also found to be elevated above residential screening levels. Both facilities have entered into Voluntary Cleanup Agreements with SCCDEH.

All Purpose Landfill
The former Santa Clara All Purpose Landfill (landfill) is a closed municipal landfill with a footprint of approximately 136 acres located adjacent to the TESP area. Portions of the landfill have been converted into a public golf course, and the remainder is open space. The landfill consists of four parcels: 1, 2, 3/6, and 4. Parcel 2 is located adjacent to the north of the TESP area and Parcel 4 is across Lafayette Street to the west. Parcels 1 and 3/6 are located further to the north and northwest.

Groundwater beneath the landfill, primarily on Parcel 4, is impacted with VOCs. The primary VOCs detected in groundwater samples collected during the first quarter of 2016 were 1,1 dicholorethene, cis-1,2-dicholoroetehene (cis-1,2-DCE), trans-1,2-dicholoroethene, TCE, and vinyl chloride. The area of VOC impacted on parcel 4 is located cross-gradient from the site with respect to groundwater flow direction (northeast) and did not migrate below the Plan Area. Two groundwater monitoring wells are located on the southern border of the landfill (Parcel 2) and immediately north of the TESP area. Low concentrations of VOCs have been detected in ground water from both monitoring wells, one of which is located down-gradient of 2339 Calle Del Mundo, an identified SLIC site discussed above. Landfill gas investigations were conducted at the landfill and identified several VOCs in

5185 Lafayette Street (Parcel 11) Project 38 Addendum to Tasman East FEIR City of Santa Clara October 2023
landfill gas. Benzene, ethylbenzene, and vinyl chloride were reported in landfill gas at concentrations exceeding residential and commercial Environmental Screening Levels (ESLs).

Given the industrial use of the site and prior agricultural uses and LUST case, residual hazardous materials contamination is anticipated to be present on-site and could impact construction workers and adjacent land uses if disturbed during demolition or construction. The following mitigation measures are included in the TESP FEIR.

Impact HAZ-1: Existing hazardous materials contamination in soils and groundwater on the site has the potential to impact construction workers and adjacent land uses if disturbed during demolition or construction of new buildings and structures on the site.

MM HAZ-1.1: Prior to the start of any demolition or construction activity, a property- specific Phase I ESA shall be completed in accordance with ASTM Standard Designation E 1527-13 (or most recent version) to identify Recognized Environmental Conditions, evaluate the property history, identify active and abandoned wells, and establish if the property is likely to have been impacted by chemical releases. Soil, soil vapor and/or groundwater quality studies shall subsequently be conducted, if warranted based on the findings on the property-specific Phase I ESAs to evaluate if mitigation measures are needed to protect the health and safety of site occupants. All site mitigation measures identified in the property-specific Phase I and II ESAs shall be completed under the oversight of an appropriate regulatory agency, such as the DEH, DTSC, or RWQCB. Any required cleanup/remediation of the site during development activities shall meet all applicable federal, state and local laws, regulations, and requirements. The project applicant shall provide the appropriate oversight agency’s written approval of the site mitigation measures to the City of Santa Clara prior to the issuance of a demolition and/or grading permit.

MM HAZ-1.2: At properties where VOCs are identified as contaminants of concern (COC), the potential for vapor intrusion shall be evaluated. A Vapor Intrusion Investigation Work Plan shall be submitted to the overseeing regulatory agency for review and approval. The plan shall include soil vapor sampling for VOCs in areas of concern. The soil vapor sampling shall be conducted in conformance with DTSC’s July 2015 advisory titled Active Soil Gas Investigations. A minimum of two soil vapor sampling events (with soil vapor concentrations less than the most conservative residential or commercial screening levels – as appropriate) is required to document that mitigation measures are not required; additional sampling events may be required by the overseeing regulatory agency.

MM HAZ-1.3: The need for vapor intrusion mitigation measures will be dependent upon the planned building design and the results of the Vapor Intrusion Investigation.

Prior to redevelopment of the site, a report assessing the potential for vapor intrusion shall be submitted to and approved by the overseeing regulatory

5185 Lafayette Street (Parcel 11) Project 39 Addendum to Tasman East FEIR City of Santa Clara October 2023
agency. The assessment shall be conducted in general conformance with DTSC’s Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (Vapor Intrusion Guidance) dated October 2011.

MM HAZ-1.4: Prior to the start of any construction activity on properties with known COC exceeding the lower of the then-current DTSC, the RWQCB or Environmental Protection Agency (EPA) residential screening levels, the project proponent shall submit the following plans to the overseeing regulatory agency for review and approval:

• Corrective Action Plan. An appropriate corrective action plan (e.g. remedial action plan, removal action workplace, etc.) shall be prepared that reflects the results of the above investigations. Site cleanup levels presented in the plan shall be based on a target cancer risk of 0.00001 or, for non-carcinogens, a target hazard quotient (THQ) of 1.0. The lower of the then-current DTSC, RWQCB, or EPA residential screening levels shall be used to interpret the TR and THQ levels or, alternatively, a site- specific human health risk assessment shall be prepared and approved by the overseeing regulatory agency. Higher cleanup goals may be acceptable, if approved in writing by the oversight agency. The project applicant shall provide an oversight agency’s written approval of the corrective action plan to the City of Santa Clara prior to issuance of a demolition and/or grading permit. Leaving contaminated soil (above residential screening levels and, for metals, above background concentrations) in-place or re-using contaminated soil shall require the oversight agency’s written approval. At a minimum, if contaminated soil is left in-place, a deed restriction or land use covenant shall detail the location of the soil. This document shall include a surveyed map of the location of the impacted soil and shall restrict future excavation in the impacted area unless approved in writing by an oversight agency.

• Air Monitoring Plan. This plan shall assess the potential for exposure of construction workers and neighboring occupants adjoining the property to COCs during construction activities; this plan shall specify measures to be implemented if COC concentrations exceed threshold values.

• Vapor Intrusion Mitigation Plan and Associated Documents. If the Vapor Instruction Investigation identifies the need for mitigation measures, a Vapor Intrusion Mitigation Plan shall be prepared that describes the measures to be a result of vapor intrusion. The Vapor Intrusion Mitigation Plan will require the project applicant to design the proposed occupied spaces with appropriate structural and engineering features to reduce risk of vapor intrusion into buildings. At a minimum, this design shall include:
1) passive sub-slab ventilation with a spray applied vapor barrier (and with the ability to convert the system from passive to active ventilation), 2) monitoring to ensure the long-term effectiveness of the remedy, and 3) the implementation of institutional controls. Other designs would be

5185 Lafayette Street (Parcel 11) Project 40 Addendum to Tasman East FEIR City of Santa Clara October 2023
acceptable is approved in writing by the overseeing regulatory agency.

The Vapor Intrusion Mitigation Plan shall be submitted for agency review and approval. DTSC’s October 2011 Vapor Intrusion Mitigation Advisory provides useful guidance in selecting, designing, and implementing appropriate response actions for sites where a potential vapor intrusion risk has been identified. A completed report shall be submitted to the overseeing regulatory agency upon completion of construction of the mitigation system. The report shall document installation of the vapor control measures identified in the Vapor Intrusion Mitigation Plan and present final as-built design drawings. A Long-Term Operations, Maintenance, and Monitoring Plan (OMMP) also shall be submitted for agency approval that presents the actions to be taken following construction to maintain and monitor the vapor intrusion mitigation system, and a contingency plan should the vapor mitigation system fail. A financial assurance mechanism shall additionally be established (i.e. proof that adequate funds are available for long-term maintenance and monitoring of the vapor intrusion mitigation system) and described in the OMMP.

MM HAZ-1.5: A Site Management Plan (SMP) and Health and Safety Plan (HSP) shall be developed to establish appropriate management practices for handling and monitoring of impacted soil, soil vapor, and groundwater that potentially may be encountered during construction activities. The SMP shall be prepared by an Environmental Professional and be submitted to the overseeing regulatory agency (e.g. RWQCB, DTSC and/or DEH) for review and approval prior to commencing construction activities. The SMP also shall be provided to the City of Santa Clara. Prior to the start of any construction activity that involves below ground work (i.e. mass grading, foundation construction, excavating or utility trenching), information regarding site risk management procedures, including copies of the HSP and SMP, shall be provided to the contractors for their review, and each contractor shall provide such information to its subcontractors. The SMP and HSP measures shall be incorporated into the project design documents:

• Site control procedures to control the flow of personnel, vehicles and materials in and out of the site;
• Measures to minimize dust generation, stormwater runoff and tracking of soil off-site;
• Protocols for conducting earthwork activities in areas where impacted soil, soil vapor and/or groundwater are present or suspected. Worker training requirements, health and safety measures and material handling procedures shall be described;
• Perimeter air monitoring for dust during any activity that significantly disturbs impacted site soil (i.e. mass grading, foundation construction, excavating or utility trenching) to document the effectiveness of dust control measures;

5185 Lafayette Street (Parcel 11) Project 41 Addendum to Tasman East FEIR City of Santa Clara October 2023
• Protocols to be implemented if buried structures, wells, debris, or unidentified areas of impacted soil are encountered during site development activities;
• Protocols to characterize/profile soil suspected of being contaminated so appropriate mitigation, disposal or reuse alternatives, if necessary, can be implemented. Soil in contact with impacted groundwater shall be assumed contaminated. All soil excavated and transported from this site shall be appropriately disposed of at a permitted facility; • Stockpiling protocols for “clean” and “impacted” soil; • Decontamination procedures to reduce the potential for construction equipment and vehicles to release contaminated soil onto public roadways or other off-site transfer;
• Procedures to evaluate and document the quality of any soil imported to the site. Soil containing chemicals exceeding residential (unrestricted use) screening levels or typical background concentrations of metals shall not be accepted. The DTSC’s Clean Fill Advisory (October 2001 or latest version) provides useful guidance on evaluating imported fill; • Methods to monitor excavations and trenches for the potential presence of VOC impacted vapors. Mitigation protocols shall be developed and implemented in the event elevated VOC vapors are released during excavation activities that may pose a risk to construction worker health and/or risk to the health of occupants of neighboring properties; • Protocols to evaluate if the residual contaminants will adversely impact the integrity of below ground utility lines and/or structures (i.e. the potential for corrosion due to subsurface contamination) • Measures to reduce soil vapor and groundwater migration through trench backfill and utility conduits. Such measures shall include placement of low-permeability backfill “plugs” at specified intervals on-site and at all locations where the utility trenches (within impacted soil or groundwater) extend off-site. In addition, utility conduits that are placed below groundwater shall be installed with water-tight fittings to reduce the potential for groundwater to migrate into the conduits. • Measures to help reduce the potential for the downward migration of contaminated groundwater if deep foundation systems are proposed.

These measures shall be identified in the geotechnical investigation report and implemented as part of the development plans.

MM HAZ-1.6: The project applicant’s environmental professional shall assist in the implementation of the SMP and shall, at a minimum, perform part-time observation services during demolition, excavation, grading and trenching activities. Upon completion of construction activities, the environmental professional shall prepare a report documenting compliance with the SMP; this report shall be submitted to the oversight regulatory agency and the City of Santa Clara.

5185 Lafayette Street (Parcel 11) Project 42 Addendum to Tasman East FEIR City of Santa Clara October 2023
With implementation of the identified measures, development under the TESP would have a less than significant impact related to soil and groundwater contamination.

3.4.2 Hazards and Hazardous Materials Impacts Resulting from the Proposed Project The project would demolish the existing light industrial building (approximately 13,720 square feet) and associated surface parking lot) and construct a 21-story, residential building with up to 198 residential units and approximately 3,008 square feet of retail.

Groundwater on-site has been encountered at a depth ranging from five to eight feet below the ground surface (bgs) and flows in the southeastern11 direction. Fluctuations in the groundwater level may occur due to seasonal changes, variations in rainfall, and underground drainage patterns.

Consistent with mitigation measures HAZ-1.1 and HAZ-1.2, a Phase I Environmental Site Assessment (ESA) and Phase II ESA dated July 2018 and July 2019, respectively, was completed by AllWest Environmental. Copies of the reports are provided in Appendices C and D.

Phase I Environmental Site Assessment
On-Site Sources of Contamination
Based on a review of the project site, the site is listed within the Resource Conservation and Recovery Information System (RCRIS), HAZNET databases for the disposal and generation of small quantities of hazardous waste. No violations were identified. Based on the Phase I ESA, disposal and generation of small quantities of hazardous waste were determined not to be a recognized environmental concern (REC).

Off-Site Sources of Contamination
Within a one-mile radius of the project site, 53 off-site facilities were identified on various databases.

None of the off-site facilities were determined to represent a significant environmental concern for the site because 1) the facility has a case closed status, 2) the distance of the facility from the project site and/or the location of the release relative to groundwater flow, and/or 3) the site has been determined not to be an REC.

Phase II Environmental Site Assessment
In July 2019, AllWest Environmental, Inc. prepared a Phase II ESA to assess the project’s soil and groundwater quality. Five borings (B-1 to B-5) were advanced in June 2019 to collect 18 soil samples and three groundwater samples [B-1(GW), B-2(GW), and B-5(GW)].

One soil sample was collected from each boring and was analyzed for total petroleum hydrocarbons as diesel and motor oil (TPH-d and TPH-mo), total petroleum hydrocarbons as gasoline (TPH-g), volatile organic compounds (VOCs), polynuclear aromatics and polyaromatic hydrocarbons (PNAs/PAHs), organochlorine pesticides (OCPs) p,p-Dichlorodiphenyltrichloroethane (p,p-DDT),

11 Per the Phase I and II ESAs, the local topography is relatively flat and groundwater flow directions has been documented as variable on adjacent properties.

5185 Lafayette Street (Parcel 11) Project 43 Addendum to Tasman East FEIR City of Santa Clara October 2023
CAM 17 metals and hexavalent chromium (Cr6). The three groundwater samples were analyzed for TPH-d, TPH-mo, TPH-g, VOCs, PNAs/PAHs, CAM 17 metals, and CR6.

Concentrations of arsenic and vanadium were found in all five soil samples exceeding their respective RWQCB Tier 1 Environmental Screening Levels (ESLs). Total lead was detected in soil samples B-3 and B-4 exceeding its respective Tier 1 ESL. None of the detected metal concentrations, including lead, exceeded Tier 2 ESLs except for arsenic. Arsenic and vanadium concentrations are within typical regional background levels. None of the detected metals concentrations exceeded State of California Title 22 Total Threshold Limit Concentration (TTLC) hazardous waste levels.

Low concentrations of various metals, petroleum hydrocarbons, VOCs, PAH/PAHs, and OCP p,p’- DDT were detected in several soil samples; however, none of the soil samples exceeded its respective Tier 1 ESLs with the exception of sample B-3. Organochlorine Pesticides p,p-DDT was detected in sample B-3 which slightly exceeds its Tier 1 ESL. No other constituents of concern (COCs) were detected in the soil samples exceeding their respective ESLs.

Concentrations of naphthalene was found exceeding its respective Tier 1 ESL in all groundwater samples. Organochlorine Pesticides p,p-DDT and Molybdenum was detected in sample B-1 (GW) exceeding its respective Tier 1 ESL. Nickel and cobalt were detected in sample B-3 (GW) exceeding their respective Tier 1 ESL. No other COCs were detected in the groundwater samples exceeding their respective Tier 1 ESLs. Low concentrations of various metals, TPH-mo, VOCs and PAH/PAHs were detected in the groundwater but were not exceeding their respective Tier 1 ESLs.

Based on the findings of the Phase I and II ESAs, the slightly elevated COC concentrations identified on-site would not impact human health or the environment. Consistent with the TESP FEIR, the project would be required to implement mitigation measures HAZ-1.4 to HAZ-1.6 to ensure that the proposed development would not exacerbate any potentially existing hazardous materials contamination. Therefore, the project would not result in new or more substantive hazardous materials impacts than were previously identified in the TESP FEIR.

3.5 HYDROLOGY AND WATER QUALITY
The following analysis addresses the projects consistency with the Municipal Regional Stormwater NPDES Permit (MRP).

Because the proposed project is consistent with the development assumptions in the TESP FEIR, water quality impacts from construction would be consistent with the conclusions of the FEIR.

Furthermore, the project would be consistent with the findings of the FEIR regarding groundwater, drainage, and inundation hazards. No further discussion of these issues is provided.

3.5.1 Findings of the Previously Certified FEIR
Post-Construction Stormwater Treatment
The TESP FEIR states that all projects within the TESP area are required to comply with the MRP and C.3 stormwater treatment regulations. The TESP FEIR concluded that compliance with regulatory requirements would result in a less than significant water quality impact.

3.5.1.1 5185 Lafayette Street (Parcel 11) Project 44 Addendum to Tasman East FEIR City of Santa Clara October 2023

3.5.2 Hydrology and Water Quality Impacts Resulting from the Proposed Project Post-Construction Stormwater Treatment
Consistent with the TESP FEIR, the proposed project would be required to comply with the MRP and NPDES requirements. The project proposes to treat runoff from the project site with a media filter and flow-through planters. The final stormwater control plan shall be reviewed and approved by the City at the development permit stage. Therefore, the proposed project would not result in any new impacts or substantially increase the severity of the previously identified hydrology and water quality impacts.

3.6 NOISE AND VIBRATION
The following analysis addresses the potential operational noise impacts that would result from the proposed project. Because the project is consistent with the development assumptions in the TESP FEIR, construction noise and vibration would be consistent with the conclusions of the FEIR and all identified mitigation measures would be required and are incorporated by reference. No further discussion of construction noise and vibration is provided.

Operational noise issues pertaining to mechanical equipment, traffic noise, and aircraft noise was found to be less than significant in the TESP FEIR. Because the project is consistent with the development assumptions in the TESP FEIR, the proposed project would also have a less than significant impact. No further analysis for operational noise is required.

3.6.1 Findings of the Previously Certified FEIR
With limited exceptions like airport noise, CEQA does not address the effects of existing environmental conditions on a project. The TESP FEIR analyzed aircraft noise as a CEQA impact and concluded that the impact would be less than significant, as the anticipated noise levels would be compatible with the proposed land uses with respect to the guidelines set forth in the Airport Master Plan. Since the proposed project is located within the TESP area and is consistent with the development projections in the TESP FEIR, the project’s aircraft noise impacts would also be less than significant. For noise from sources other than aircraft, the City of Santa Clara addressed the effect of existing noise sources on future residents in the TESP area as a planning consideration.

The predominant sources of noise that affect the noise environment within the TESP area and at nearby land uses results primarily from vehicular traffic along Lafayette Street and Tasman Drive.

Traffic along the local streets within the TESP area, which include Calle Del Mundo and Calle De Luna, also affect the ambient noise environment. Aircraft associated with Norman Y. Mineta San José International Airport and trains passing along the Lick Mill Light Rail Transit Station and Great America Station also contribute to the noise environment in the area. Levi’s Stadium, approximately 1,352 feet away from the project area, periodically contributes to the noise environment during large events such as NFL games and concerts. Based on findings from the 2009 Stadium EIR4F 12, residences
within 2,000 feet of the stadium would experience elevated exterior noise levels during events which would result in a significant unavoidable impact.

12 City of Santa Clara. 49ers Santa Clara Stadium Project FEIR. November 2009.

3.5.2.1 5185 Lafayette Street (Parcel 11) Project 45 Addendum to Tasman East FEIR City of Santa Clara October 2023
Future Exterior Noise Levels
Based on the long-term measurements made within the TESP area, future exterior noise levels would be 70 A-weighted decibel (dBA) Community Noise Equivalent Level (CNEL) along Tasman Drive, 74 dBA CNEL along Lafayette Street, and up to 67 dBA CNEL along the future Lick Mill Boulevard extension. Residential development proposed along these roadways would be incompatible with noise levels established for residential outdoor activity areas. The following conditions of approval were included in the TESP FEIR to reduce exterior noise levels at common outdoor activity areas consistent with the City’s General Plan:

• Do not locate common outdoor activity areas immediately adjacent to Tasman Drive, Lafayette Street, or the future Lick Mill Boulevard extension. • Utilize site planning by placing outdoor activity areas in courtyards, on shielded podium levels (sky gardens) or rooftops, or behind buildings adjoining Tasman Drive, Lafayette Street, and Lick Mill Boulevard. Development adjacent to existing and planned open space shall be designed to provide shielding of the open space from Tasman Drive, Lafayette Street, and Lick Mill Boulevard.

Future Interior Noise Levels
Commercial Land Uses
Interior noise levels would vary depending upon the design of the buildings (relative window area to wall area) and the selected construction materials and methods. The CALGreen Code establishes that interior noise levels shall be maintained at 50 dBA Leq(1-hr) or less during hours of operation at any proposed commercial buildings. Standard commercial construction provides approximately 30 dBA of exterior-to-interior noise reduction. At a distance of 50 feet from Lafayette Street along the western edge of the project site, the future noise level would be up to 77 dBA. At a distance of 65 feet from Tasman Drive along the southern edge of the project site, the future noise level would be up to 74 dBA. Standard construction would result in compatible interior noise levels in commercial uses within the plan area.

Residential Land Uses
The City of Santa Clara requires that interior noise levels be maintained at 45 dBA CNEL or less for residences. Interior noise levels would vary depending upon the design of the buildings (relative window area to wall area) and the selected construction materials and methods. Standard residential construction provides approximately 15 dBA of exterior to interior noise reduction, assuming the windows are partially open for ventilation. Standard construction with the windows closed provides approximately 20 to 25 dBA of noise reduction in interior spaces. Where exterior noise levels range from 60 to 65 dBA CNEL, the inclusion of adequate forced-air mechanical ventilation is often the method selected to reduce interior noise levels to acceptable levels by closing the windows to control noise. Where noise levels exceed 65 dBA CNEL, forced-air mechanical ventilation systems and sound-rated construction methods are normally required. Such methods or materials may include a combination of smaller window and door sizes as a percentage of the total building façade facing the noise source, sound-rated windows and doors, sound rated exterior wall assemblies, and mechanical ventilation so windows may be kept closed at the occupant’s discretion.

5185 Lafayette Street (Parcel 11) Project 46 Addendum to Tasman East FEIR City of Santa Clara October 2023
According to the TESP FEIR, sound levels would range from 72 to 74 dBA CNEL at a distance of 50 feet from the southern and western border of the TESP area. Future interior noise levels at the plan area would be up to 55 dBA CNEL, which exceeds the 45 dBA CNEL threshold of the General Plan.

The TESP FEIR includes the following conditions of project approval to reduce interior noise levels to 45 dBA CNEL or less:

• Assuming a conservative estimated ratio of 30 percent windows/doors to total wall area, preliminary calculations indicate that the facades of high-density residential buildings having line-of-sight to Lafayette Street would require windows and doors with a minimum STC rating of 30 to meet the interior noise threshold established by the City. • Along the façades having direct line-of-sight to Tasman Drive and Lick Mill Boulevard, the minimum required STC rating for windows and doors would be 26. • Provide a suitable form of forced-air mechanical ventilation, as determined by the Community Development Director, for all residential units in the plan area so that windows can be kept closed at the occupant’s discretion to control interior noise and achieve the interior noise standards.
• A qualified acoustical consultant shall review the final site plans, building elevations, and floor plans of the proposed residential buildings and make recommendations for noise insulation to reduce interior noise levels to 45 dBA CNEL or less. Treatments would include, but are not limited to, forced-air mechanical ventilation systems, sound-rated wall and window constructions, acoustical caulking, protected ventilation openings, etc. The specific determination of what noise insulation treatments are necessary shall be conducted during final design of the project. Results of the analysis, including the description of the necessary noise control treatments, shall be submitted to the City, along with the building plans and approved design, prior to issuance of a building permit.

3.6.2 Noise and Vibration Impacts Resulting from the Proposed Project In July 2023, Illingworth & Rodkin, Inc. prepared an Interior Noise Assessment for the proposed project. A copy of this report is provided in Appendix E.

Exterior Noise Levels
Future noise levels along Lafayette Street and Tasman Drive were calculated as part of the TESP Traffic/Construction Noise Update Memorandum.13 At a distance of 50 feet from the southern and western border of the TESP area, noise levels would range from 72 to 74 dBA CNEL. Noise levels would range from 62 to 67 dBA CNEL throughout the remainder of the site due to vehicular traffic along Calle De Luna and Calle Del Sol, as well as aircraft associated with Norman Y. Mineta San José International Airport.

The project site would be subject to noise generated primarily by vehicular traffic along Lafayette Street and the UPRR. The worst-case noise exposure would occur along the western building façade, approximately 60 feet from the Lafayette Street centerline. At this distance, future exterior noise

13 Illingworth & Rodkin, Inc. Tasman East SEIR Traffic/Construction Noise Update Memo. December 2, 2022. The updated analysis confirmed that noise levels along Tasman Drive and Lafayette Street would not be substantially different than those previously disclosed in the TESP FEIR.

3.6.2.1 5185 Lafayette Street (Parcel 11) Project 47 Addendum to Tasman East FEIR City of Santa Clara October 2023
levels would be up to 74 dBA CNEL.

Where exterior noise levels range from 60 to 65 dBA CNEL, adequate forced-air mechanical ventilation can reduce interior noise levels to acceptable levels by allowing occupants the option of closing the windows to reduce noise. Where noise levels exceed 65 dBA CNEL, adequate forced-air mechanical ventilation systems and sound-rated construction methods (e.g., a combination of smaller window and door sizes as a percentage of the total building façade facing the noise source, sound- rated windows and doors, sound-rated exterior wall assemblies, and/or mechanical ventilation) would be required.

As proposed, the building would include private balconies. Per the TESP FEIR, private terraces or balconies within mid/high density residential developments are not typically considered sensitive to exterior noise levels. The project proposes private open space on floors one, six, and 21. The proposed open space would be set back from Lafayette Street by the proposed parkway and landscaping by approximately 31 feet at the northern end of the site and 20 feet at the southern end of the site. Nevertheless, the proposed project would be required to comply with the conditions of project approval identified in the TESP FEIR to reduce exterior noise levels at common outdoor activity areas. As a result, the proposed project would not result in any new impacts or substantially increase the severity of the previously identified impact.

Interior Noise Levels
Standard residential construction provides approximately 15 dBA of exterior to interior noise reduction, assuming the windows are partially open for ventilation. Standard construction with the windows closed provides approximately 20 to 25 dBA of noise reduction in interior spaces.

Consistent with the conditions of project approval in the TESP FEIR, the proposed site plan and building elevations were reviewed and interior noise levels from exterior noise sources were quantified by Illingworth & Rodkin, Inc. to determine the necessary building treatments to meet the City’s interior noise standard. To maintain a habitable interior environment, all dwelling units should be mechanically ventilated so that windows and doors can be kept closed at the occupant’s discretion. The following noise insulation features shall be incorporated, as a condition of project approval, to reduce interior noise levels to meet the City’s interior noise threshold.

Conditions of Project Approval:

• The proposed retail space and residential units located on floors two to five shall have windows and doors with a Sound Transmission Class (STC) rating of 35 or greater to meet the interior noise threshold established by California Green Building Standards Code (CALGreen) requirements.
• The proposed residential units along the western (sixth floor and above) and portions of the northern and southern building façades closest to Lafayette Street shall have windows and doors with a STC rating of 32 or greater to meet the interior noise threshold established by the City.
• The remaining building façades shall have windows and doors with a STC rating of 28 or greater.

3.6.2.2 5185 Lafayette Street (Parcel 11) Project 48 Addendum to Tasman East FEIR City of Santa Clara October 2023
• A suitable form of force-air mechanical ventilation, as determined by the local building official, shall be provided to all dwelling units on-site so that windows can be kept closed at the occupant’s discretion.
• If substantive changes are made to the design of the project prior to building department submittal, a qualified acoustical consultant shall confirm the noise insulation recommendations based on the final site plans, building elevations, and floor plans of the proposed building. Results of the analysis, including the description of the necessary noise control treatments, shall be submitted to the City, along with the building plans and approved design, prior to issuance of a building permit.

With implementation of the conditions of approval identified above, the interior noise levels would be below 45 dBA CNEL within the residential units and below 50 dBA Leq within the retail space. As a result, the proposed project would not result in any new impacts or substantially increase the severity of the previously identified impact.

3.7 CONCLUSION
Based on the above analysis and discussion, no substantive revisions are needed to the TESP FEIR, because no new significant impacts or impacts of substantially greater severity would result from the proposed project. There have been no changes in circumstance in the project area that would result in new significant environmental impacts or substantially more severe impacts, and no new information has come to light that would indicate the potential for new significant impacts or substantially more severe impacts than were discussed in the TSEP FEIR. Therefore, no further evaluation is required, and no Subsequent EIR is needed pursuant to State CEQA Guidelines Section 15162, and an EIR Addendum has therefore appropriately been prepared, pursuant to Section 15164.

APPENDICES

Appendix A: Construction Air Quality and Health Risk Assessment Appendix B: Avian Collision Risk Assessment
Appendix C: Phase I Environmental Site Assessment
Appendix D: Phase II Environmental Site Assessment
Appendix E: Interior Noise Assessment
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM
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VESTING TENTATIVE PARCEL MAP

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SANITAIIYS£11!"R.WAmt.ANDRECYa.IDWAmt
U1JUlES,Fl!Ol,IE .. SllNGAIIJPIIOPOSEDlllEES.

ClENIANCEFROMTREEIEDIJC£STCs' F fflEE
HfROMTHEEDCll:OFll'IEERob-lNIRIERTC
EDCEOFWATi:RFACl.lllE5).MOSlRIJCllJRES
(FENCIMG,FOOMDA~,BIOfl.lRA~SWALES,
ETC.)AI..LOIE)OVERSAMTNIYSEWER.PDTAII..E
~::iJ/ORIIIE0\1ll.IDW>.TEflUTIJTIE'SAND
I

I LEGEND
lREO.Ti:DSlORMDRAl<u,/E
~ffl[AltDSTORMDRAIN~E -!<I- ll -
--$--__ , __
--•--
.ONTrnEHCH(IIYOTHEIIS.flJI
flEftREHCEOl'I..V)
SANITNIY!EIER/!HORMDRAl<MANH[ll
•
55CCI./IIDCCI.
~·. .... rHl>FDc/9"','
-=

CONSTRUCTION KEY NOTES
(I};'r~FK!ri:_1-1~ '(/ We'f ~~~A ~~A.OCPARTMENT
@~=,..J ~~ ~w1~-•~~li?:.wi~~~r~~N;Amt
@NSTAI.LPOSTINDIOATCRW,.V£.(Plv)
©~=ARIJ~: ~~~- r:,vi~ ~~ ~TYS~T~~~RA WATER
®r~~~~~J=:T~O.lfll'/N:ii'?ro~ CITY
©NSTAI.L10"X~"MEDIAAl.'IER(O.D7C~MEDIAAI.TER)-MEDIA
CwATEflSTANDARDDCTAII.Mo.s. CEPEaarrOFSANTA<URA
@:~ JNl~~zti: ~r~~~~) SANTA CMA
®~::C~SANITARYSEll!"RLATtRALTOCITYMAINBY"TAP-lllt"
GN0.1B."""'"""'""TPEIICITYOFSANTACI.All,\STAIIJARIJDITM. @=~ =• """ =•~· '""=
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@=~ =• ""'" ...... '""= @rom"'"'~"=•
@= '"' =• ~, ~" ro =
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o-~.-.•--"""== ~, ~, ~-~" ""'"" _, = -, .,-« ~, ~-~ ,. - """· .. -, _,. @INSTA1.LMEWl2"DPWAlERMAIN
@••= ~ ~~ .. "'- '"" ••• .. -~ .. ,.-,-OIT~=•=n---OITM
@== .. ••·~•= .. --

TASMAN EAST
PARCEL 11
~185 L.AF"AYETTE ST
SANTAO,_ARA_CA
9505+
51851..Af"AYETTESffiEETLLC
+4-4-WOCEANBL550
LONGBE-"CH,CAQOII02
9B BATTERY STREET, SUH'E 300
SANffiANCISCO,CAi.4111

BKFENGINEERS
1730N.FIRSTSTREET.SUITE600
SANJOSE.CA
95112

CCI ENGINEERS
135 M-"IN ST. SUITE 1~00
SANffiANCISC0.CA'-4105

UTILITY PLAN
TM7.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM

CITY OF SANTA CL
ARA

TREATMENT MEASU

RE CONTROL SUMMARY TABLE
·
·
·
·
·
\

CALLE DE LUNA
C.3TREATMENTFACII.ITIESCONSTRUCTIOHNOTES
(TO APPEAR ON STORMWATER MANAGEMENT PLAN)
1 ~~~PGTA~~ ~~G=N~r~ ;~ ... cNoT~s~~~ ... ~~R~~iL_~~~~Jt~ ~~~~~+c.!ttsu5i:s ~~~0~s::c~NJJu1c~ 1'1~0A6c~ ... :~~~ TI-IEAPPROVEDBUILDINGPLANS. TJ-E THIRD-P ARTYREVIEVIER\11 1..L RECOMMENDTJ-EREQUIREDNUMBEROFS IT'E INSPECTIONS ATDIFfEREN T INTERVALSOF ~r~~:VE n;tE ~J;~;?;r;;N~::~~~T~~1!irl ~~~~~n~'tot0rn=g: ~f3~ifit,~i~~ic~ i~~l~:i ~~ TI-IBEE 5r¼Iio ~ 0~[alNI A SANT.0. Cl.ARA VALLEYURBANRUNOFFPOLLUTIONPRE\/ENTIONPROGRAM(SC\IURPPP)WEBSITEATWWW.SCWRF'PP-W2K.COM/CONSULTANT$_LIST.SHTML

2. SOILS IN TI-IE BIORETENTI ON FACll.lllES SHOUW MEET TI-IE BIOTRE,t,TMENT SOIL MIX (BSM) SPECIFICATIONS PER SC\IURPPP C.J STORMWATI:R H,t,NDBOOK, APPENDIXC. A MINIMUMPERCOI.ATIONRATEOF51NCHES/HOUR ANO A MAXIMUMPERCOlA TIONR ATE OF101NCHES/HOURAREREQUIRED(INlll AL ~~~~~~~c~:~o~ ~~~~0A c~~ ~ ~C:/~~~L~i~11~~~m;~ ~~rrn: M~~f!._ 0~~~E~: ~~~Gs~ ... ~ A~ ~~~:E~~- OR J. ~~~~r::~~..&1rili]. ~~~~ ~ ~o:MTH:OCK PER CALTRANS STANDARD SECTION 68-1.D25. THE MATERIAL SH ALL BE WASHED AND FREE

4. ~~~ORATED PIPE SHALL BE SOLVENT WELD PVC SOR 35 (OR Af'PRO\IED EQUAL) ~Tl-I PERFORATIONS FACED DOWN. LOCATION OF THE PIPE VARIES, SEE

5. INSTALLATION OF POROUSPA.EMENTAND/ORV AULTSSI-IALLBEDONEPERSTANDARDDETAILSANDSPEC lflCAllONS.Tl-llRDPARTYREVIEWEROR\IENDOR ~~~R~~~~TL~~~OIJ~:-t~~T tNNDl,.,~~iTS INSTALLATION (INCLUDING IF NECESSARY, PERFORMING PERCOLATION TEST) AND SUBMIT Tl-lEIR

6. INSTALLATIONOFINTERCEPTORlREES AS A TREATMENTCONlROLME ASURESHALLBEINSPECTEDTO\IERIF'r'lHE ACCURACYOFLOC ATIDN,SPEaES, AND

NUMBER OF INTERCEPTOR TREE&
FOR ANY LJNER PENETRATIONS. RADIAL CUT Tl-IE LJNER FOR PIPE. MASTIC AND SEAL WITH PIPE CLAlilP TO INSURE WATER-TIGHT SEAL

SEE LANDSCAPE PLANS AND SPECIFICATIONS FOR PLANTING MATERIALS WITHIN BIORETENTION FACILJTIE&

DRAINAGE

AREA A REASIZ E
(SF)
8,325
6,675
39,024

PERVIOLJS
SURfACE(SFJ PERVIOUS

SURFACE
t

IM PERVIOLJS TYPE O F IMPERVIOUS
SURfACE(Sf ) S.URFACE e-,-rn-c-,e,-,-------0 T~:~~i~ T
8,315
6,675
31,450

I LEGEND
ft AISffiflOW-THIIOUQHPI.ANTEII
PROP<.ISEOSTOIIN Dl'AIN(UNlREATEIJ)
f'l!Ol'OSfDS-NCftAIN(-...T!:C)
Dl'£Afl.OWDftAIN,-tlROPINI.CT

STORMIJRAIN-'JNCTIONBOX
--w--
c::::==:::::J
rITITIII1J
c=::::==-i

I STORMWATER CONTROL NOTES

1. !ffCIAj""9:/f&! 9:',TfMr<Y"9'
f'l!OJECTQUAL/fl[Snl!LOCl,Tlctl,CENSITYAHC PAR~INGCREDIT, LOCAT!ON: IIITHIN 1/4 Mil£ Of TKANSIT ff.JR • ~OIi CREDIT 5_ll~i\J!,~~:cr,~l~R ! 'to; c~~~ 30" ~T
2, §TORMWATERTJIE~TMENT/'JW,P,,,TA
lWAl.9lEAREA•~.0245Q.FT.(D. ~ ACIU)
TOTAI.IMPElll!OIJSAREA•31,4150SQ.FT.
°' IIIIPER..,OIJ!S AREA ffl EA'ltD BY UC ( PI.ANT915) • Z0,510/31,4:IO • 050!.211 °'IIIIP ER..,OU5AREAfflEA'l[[l8YMEDIA F1.."TER•10.034/31,4i!ll• 33.!~

3. MflllAF ■ Tf """!:/Q " UMWRYTAflf

I HYDROMODIFICATION REQUIREMENTS I
I :~7.l':¼':~w.::"!:\K_~~~=-i:'~~r~Th'!' I
~•~ AA"' "'"' " "' --=••• ™" "''" ro ,AAoe,m •~~ THATEXIENDCONllNUOJSI.YTO TlE I.TlEHMSTANCAIEAMl ASSOCIATmft[QIJIREMENTSOONOTN'PLYTO-CTSIIITIINlHISAREA
I
:-..-• .LJ-J

TASMAN EAST
PARCEL 11
~185 LAF'AYETTE ST
SANTA Cl.AAA.CA
9505+
5185LAF'AYETTESffiEETLLC
+4+WOCEANBL550
LONGBEACH,CAQOII02
98B ATTERYSTREET,SUH'E JOO
SANffiANCISCO,C A i.4111

BKFENGINEERS
1730N.F IRSTSTREET,SUITE600
SANJOSE.CA
95112

DCIENCINEERS
135 MAIN ST. SUITE 1~00
SANffiANCISCO,C A '-'4105

STORMWATER

MANAGEMENT PLAN
TM8.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM
ADS N
-12 x SDR 35

TRANSITION COUPLING

PIPE RISER
CUT 8" BELOW

FINISH GRADE

STORM DRAIN LINE
12"x12" GALVANIZED
STEEL GRATE W/1/2"

SCREEN BELOW

LUBE GASKET AND

PIPE - SET TOP TO

GRADE AND ORIENT

GRATE TO MATCH

SURFACE

IMPROVEMENTS
TEE
P6

INLET TOP
(BOLT D
OWN)
***FOR OVERFLOW AREA DRAIN - SET RIM
ELEVATION HIGHER THAN FINISH GRADE.

SEE PLANS FOR RIM ELEVATIONS.

PROV
IDE COBBLE STONES AROUND DRAIN.
(SEE PLAN FOR PIPE SIZES)
A
A
"',>on"UL .O l_T_ , _ll',DOC\OG-0.,-1-,a..,,.,.., _- ·,-••Af\o«_,,,,.,OM<,p,, ,.,_, , ,, ·" ,.,.,,.,
SIZING TABLE BB-2
/ "GOC" f< PA\<SDAAEAS

STORM DRAIN/SANITARY SEWER CLEAN OUT
.• A .. NUAle!O:Cl'flCa-'P.)
-~- ,,.+,,.., ~ -""'
- ,_,, _, ....,.,..~,,1,.,.y,,,,.,,...,..._,.,,,, . . _,o, J .<wr,-~ - ..... -- .. ri,-~•···~··" ,_(In )
""""' '""" .... ,, ... ,.,., ,,,,. .. c-,
·:,o, 11 _ __ 11\PCG ,·,,-·0<t _C. u,· .,,,,., , . ..,°"',...""'-'·"'' ,., '"" ''"
SIZING TABLE BB-3
®
NOlE:
~f!)l2irfpi~~~~T

2.EXPANSIONJOINTSWITI-1
DOWELS TO 8E PLACrn ~VEn
'1.0'EXCEPTATRETURNS

VERTICAL CURB
®
0 6
@~:y;~:C .. l1 ~·;.
;;•. ~,...,,s.,_, Cw>•_,,,_,,.__ -,._,,'.Z,,,,, _;-•-•

STORM DRAIN CONCRETE VAULT MEDIA FILTER

OVERFLOW RISERS AT FLOW THROUGH PLANTERS

STORM DRAIN BUBBLER BOX
"-,,~, ,:w1 '·"·
',...~i~'l
i<i,; t,os•,o-, ,,,..,"°"""°"''"•"'""°"'·""'•"·""''""-'·fa'wg</ "i~I A,<,, ..,,'""1••"(•· •·••1;e.-,,,_,,,_,
A~,>teJU , . .. ,.,,w, .. ,V~ .,._= • C'"
.,.";-,- ,.., .._ .. ,.,.,..,,. ,,0,-,asl
"cl<ao· ·· O. p<hb;' , m,.,,, d<
, ,. ,,, ,,.,-, , ~ , ""' " ' "''~"' '0.' ,/0.•""1."""-"'} '-'"·""''''""'"'"'"ff "'"" ,ood..,b<t.~toflo.Alo,l<>dO',tfJ,., ""'"~•oT,c•a,"~·•l'"'''·""••~
r-·1 .. 1
, . .10ams.,, _ _ 'm"_1"00,:wu1,,,. ,\..,,.,-,,__ -..., ,,. m,· · ·· '1 ,,~.,-1o11
SIZING TABLE BB-1
~ ::"-":-.."":::."".:==.. .. __ .,., ___ .,......,
+
KrlStar Enterprises, Inc.
... ,--··"'-·"'-.. , ....... _,~ ,.,_,..-.., ----004ICI& Ill.-_,,. :;,.,,,,., ..,.,, .. ,

TASMAN EAST
PARCEL 11

DETAILS
ITM9.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM
' I
I
I
I
-~~~~~~~;~\ ~,
I
I
I~
I ..:..)P
l
I
-::_,-- ---- - - -~::--~
'•'

CALLE DE LUNA
~ 2.50 1'. 50
Wheelchair Lift Van
Lock Time
Angl e
I

GMPHIC SCALE
k.-.,W-J

TASMAN EAST
PARCEL 11
1111111 LAFAYETTE ST
=a..ARA,CA
1111111 LAFAYETIESTREETU.C
4MWOC£AN Bl.690
L.0NljlEIPCtf,CAIIOII02
-­
NBATIERYS11EET, S111E ;,oo
SMl'ltANasco,CA!M-111
BICFENQINEEltS l73DN.FIIISTSTREET,Sll1EIICIO
~2JOSE,CA
---~ m~STcf:.::;,4
00 .......
135MAINST.5ll1E1800
SANFRANC19CO,CAM10!I
'::=
_CAR TURNING TEMPLATE
TM10.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM
I
I
I r
,,
11 I .

I
I ,, I
I
I
I
~
. 1
I l'i
1;
1•
..
t

EXISTING FIRE

HYDRANT
;ij
~ . . ~ 0
~ ~;~Clara r·r eTruck
~Ill-- ~ .. ~--
~

11.90 18.50
San t a Clara FireTruck
feet
Lock Tim e
Angl e
ij
IB(>

I FIRE REQUIREMENTS

I LEGEND
I
~ STANCE BETWEEN
FlREH YO RANTS

TASMAN EAST
PARCEL 11
1111111 LAFAYETTE ST
=a..ARA,CA
1111111 LAFAYETIESTREETU.C
4MWOC£AN Bl.690
L.0NljlEIPCtf,CAIIOII02
-­
NBATIERYS11EET, S111E ;,oo
SMl'ltANasco,CA!M-111
BICFENQINEEltS l73DN.FIIISTSTREET,Sll1EIICIO
~2JOSE,CA
---~ m~STcf:.::;,4
,.......,
135MAINST.5ll1E1800
SANFRANC19CO,CAM10!I
'::=

FIRE HYDRANT
DISlRIBUllON
TM11.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM

LAFAYETTE STREET SECTION
I!_ I
~ ------I
ic'}., I
it?- ,7 ~:
' I
i "4:-4---~~----'~· AC~' I_';;.~-~:.:~~;~-~-~~--'
~ o i I
~;;!NL._..-' !
i i
i i
' I
I :

SECTION

TASMAN EAST
PARCEL 11
~185 L.AF"AYETTE ST
SANTAO,_f.RA.CA
9505+
51851..AF"AYETTESffiEETLLC
+4+WOCEANBL550
LONGBEACH,CAQOII02
98 BATTERY STREET, SUH'E 300
SANffiANCISC0,CAi.4111

BKFENGINEERS
1730N.F IRSTSTREET.SUITE600
SANJOSE.CA
95112

CCI ENGINEERS
135 MAIN ST. SUITE 1~00
SANffiANCISC0.C A '-'4105

SECTIONS
TM12.0
Copyright 2018 Steinberg Hart, All Rights Reserved - These Plans and/or Specifications are intended for the sole benefit of Steinberg Hart's client and may not be used, reused, copied, or reproduced in any form without the express written consent of Steinberg Hart. 12/14/2022 2:29:52 PM
Construction Best Management Practices (BMPs)
Materials & Waste Manag ement
Non- Haza rdou s Mate rials
□ Benn and cover stockpiles of sand. din or other construction material withtarpswhenrainisforecastorwhentheyarcnotinuse
0 Use (but don't overuse) reclaimed wate r for dust control. 0 Ensure dust control water doesn '1 leave site or discharge to stonn drnins.

Hazardo us Materi.a ls
0 Label all hazardous materials and hazardous wastes (such as pesticides, paints, thinners, solvents, fuel, oil, and am ifreeze) in accordance with City, County, State and Federal regulations. 0 Store hazardous materials and wastes in water tight containers, store in appropriate secondary containment, and cover them at the end of every work day or during wet weather or when rain is forecast. 0 Follow manufacturer's application instructions for hawrdous materials and du not use more than necessary. Do not app ly chemicals outdoors when rain is forecast with in 24 hours. 0 Arrange for appropr iate disposal of all ha7..ardous wastes.

Wa ste Ma nagemen t
□ Cover and maintain dumpsters. Check frequent ly for leaks. Place dumpsters under roofs or cover with tarps or plastic sheeting secure d around the outside of the dumpster . A plastic liner is recommended lo prevent leaks. Never clean out a dumpster by hosing it down on the construction site.
0 Place portable toilets away from stoITTl drains. Make sure they are in good working onkr . Check frequently for kaks.
0 Dispose of all wastes and demolition debr is properly . Recycle materials and wastes that can be recycl ed, including solvents, walcr­ hasecl paints, vehic le fluids, broken asphalt and concrc1c, wood, and clean:d vegetation.
0 Dispose ofliqu id residues from paints , thinners, solvents, glues, and cleaning fluids as hazardous waste .
□ Keep site free of litter (e.g. lunc h items, cigarette butts). 0 Prevent litter from uncovered loads by covering loads that are being cransportcd to and from site.

Cons tr uction [ntranees and Perimeter
0 Establish and maintain effective perimeter wntrols and stabi lize all constrnction entrances and exits to sufficient ly control eros ion and sediment discharges from site and tracking off site
0 Sweep or vacuum any street tracking immediately and secure sediment source to prevent further tracking. Never hose down streets tocle;in uptnu;king.

Construction project s are required to implement year -round stormwater BMPs.

Equipment Management &
Spill Control
Ma intenance and Parki ng
0 Designat e an area of the construction site, well away from streams or stOITTl dmin inlets and filled with
;ipprupriate BMPs, for auto and equipment p,1rking,
and s1orage.
0 Perform major maintenance, repair jobs , and vehicle
and equipment washing off site.
0 If refueling or vehicle maintenance must be done
onsite, work in a bcrmed area away from storm drains
and over a drip pan or drop cloth s big enough to collect fluids. Recycle or dispose of fluids as hazardous waste. 0 If vehicle or equipment cleaning must be done onsitc, clean with water only in a bcm1ed area that will not
allow rinse water to run into gutters, street~, stoITTl drains,orsurfaccwaters.
0 Do not clean veh icle or equipment onsite using soaps. solvents, degreasers, OI' steam cleaning equipment, and do not use diesel oil to lubricate equipment or parts
ons1te.

Spill Prc,·entio n and Co ntrol
0 Keep spill cleanup materials (e.g ., rags, absorbents and 1:at litter)availablcut the construction site at all times. 0 Maintain all vehicles and heavy equipment. Inspect
frequently for and repair leaks. Use drip pans to catc h leaksuntilrepairsaremade .
0 Clean up leaks , drips and other spills immediately and dispose of cleanup materials properly.
0 Use dry cleanup methods whenever possible
(absorbent materials, cat litter and/or rags).
0 Sweep up spilled dry materials immediately. Never
attempt to '"wash them away " with water, or bury
them
0 Clean up spills on dirt areas by digging up and
properly disposing ofcontmninatcd soi l.
0 Report significant spills to the appropriate local spill response agenc ies immediately. If the spill poses a
significant hazrd to human health and safety, property
or the environment, you must report it to the Slate
Office of Emergency Services. (800) 852-7550 (24
hours).

Earthmoving
G radin g a nd Earthwork
0 Schedule grading and excavation work
during dry weather
0 Stab il ize all denuded areas , install and
maintain temporary erosion controls (such
as erosion control fabric or bonded fiber
matr ix) until vegetation is establis hed.
0 Remove existing vegetation only when
abso lutely necessary, plant temporary
vegetation for erosion contro l on slopes
or where construction is not immediately
planned
0 Prevent sediment from migrating offsi te
and protect stonn drain inlets, drainage
courses and streams by installing and
main taining appropriate BMPs (i.e. silt
fences, gravel bag s, fiber rolls, temporary
swalcs,etc.).
□ Keep excavated soi l on site and transfer it
to dump trucks on site, not in the streets .

Co ntaminat ed So ils
0 If any of the follow ing conditions arc
observed, test for contamination and
contact the Regional Water Quality
Control Board:
- Unusual soi l conditions, disco loration,
or odor.
- Abandoned underground tanks.
- Abandoned wells
Buried barrels, debris, or trash.
0 If the above rnnditiuns are observed,
document any signs of potentia l
contamination and clearly mark them so
they arc nm distrurbcd by construction
a1:tivities.

Land sca pin g
0 Protect stockpiled landscaping materials
from wind and rain by storing th em under
tarps all year-round
0 Stack bagged material on pallets and
undercover.
0 Discontinue application of any erodib le
landscape material with in 2 days before a
forecast rain event or during wet weathe r.

Concrete Management
and Dewatering
Concrete Manage ment
0 Store both dry and wet material s under
cover, protected from rainfal l and runoff and
away from stoITTl drains or waterways. Store
tmiterials off the gro und, on pallets. Prok-ct
dry materials from wind.
0 Wash down exposed aggregate concrete
only when the wash water can (1) flow onto
a din area ; (2) drain onto a bem1ed surface
from which it can be pumped and disposed
of properly; or (3) block any storm drain
inletsandvacuumwashwaterfromthe
gutter. If possible, sweep first
0 Wash out concrete equipment/trucks offsite
or in a designated washout area onsitc,
where the water will flow into a temporary
waste pit, and make sure wash water docs
not leach into the underlying soil. (Sec
CASQA Construction BMP Handbook for
properly designed concrete washouts.)
Uewat erin g
0 Dis<.:hargc:s of groundwater or captured
runoff from dcwatcring operations must
be properly managed and disposed . When
possible, send dcwatcring discharge to
landsca ped area or sanitary sewer. If
discharging to the sanitary sewer, call your
local wastewater treatment plant.
0 Divert run-on water from omitc away from
all disturhedarcas.
0 When dewatering, notify and obtain
approval from the local municipa lity before
dischargi ng wate r to a street gutter or stonn
drain. Filtration or diversion through a basin,
tank,orsedimenttrapm<1yberequired.
0 In areas of known or suspec ted
contaminat ion, ca ll your local agency to
dctcm1inc whether the ground water must be
tested. Pumped groundwater may need to be
colkctcd and hauled off-site for treatment
and proper disposa l.

Paving /Asphalt Work
Paving
0 Avoid paving and seal coating in wcl
weather or when rain is forecast. to
prevent material s that have not cured
from co ntact ing stormwatcr runoff.
0 Cover stoITTl drain inlets and manholes
when applying sea l coat, slurry seal, fog
seal.or sim ilar materials.
0 Collect and recycle or properly dispo se of
excess abrasive gravel or sand. Do NOT
sweep or wash it into gutters.

Sawcuttini;: & Asphalt /C oncr ete Removal
0 Protec, storm drain inlets during saw
cutting.
0 If saw cut slurry enters a catch basin,
clean it up immediately.
0 Shovel or vacuum saw cut slurry deposit s
and remove from the site. When making
sawcut s, useaslittlewateraspossible.

Swe ep up, and properly dispose of all
residues.

Painting & Paint Removal
Painting Cleanup and Remo val
0 Never clean brushes or rinse paint
contmncrs mto a strcel, gutter, storm
drain,or strcam.
0 Fur water-based paints, paint out brushes
to the extent poss ible, and rinse into a
drain that goes to the sanitary sewe r.

Never pour painl down a stonn dr.iin
0 For oil-based paints , paint out brushes to
the extent possible and clean with thinner
or solvent in a proper container. Filter and
reuse thin ners and solvents. Dispose of
excess liquid~ as hazardous waste
0 Sweep up or collect paint chips and dust
from non-ha zardous dry stripping and
sand blasting into plastic drop clot hs and
dispose of.is lr.ish.
□ Chemical paint stripping residue and chips
and dust from marine paints or paints
containing lead , mercury , or tribut yltin
must be dispos ed of as hazardous waste.

Lead based paint removal requires a statc­
ccrtiticd contractor.

Urban Runoff
Pollution Prevention Program
Storm drain polluters may be liable for fines of up to $10,000 per day!

TASMAN EAST
PARCEL 11

BLUEPRINT FOR A

CLEAN BAY
TM13.0