16 - ConstructionDEIS 16-1 9/12/2018
Chapter 16: Construction
16.1. INTRODUCTION
This Chapter describes the anticipated sequence of construction of the Proposed Project as well as analyzes the potential for temporary adverse environmental impacts as a result of that construction. As such, these analyses address the potential for the Proposed Action to have one or more significant adverse environmental impacts that were identified in the Lead Agency’s Positive Declaration (see Appendix A-5).
Construction of the Proposed Project would be expected to take approximately 30 months. Construction would be split into seven phases: demolition of the existing building, road construction and site utilities, building of the Assisted Living (AL) facility, building of the
Independent Living (IL) center core, building of the IL south wings, building of the townhouses, and site restoration. Each new building is expected to be constructed in four sub phases: foundations, framing and roofing, interiors and exterior finishes, and site work.
The Applicant would prepare a detailed Construction Management Plan (CMP), which would provide for the implementation of proposed construction plan and the measures proposed to mitigate potential adverse impacts, as described below. The CMP would be reviewed by Village
of Rye Brook (the “Village”) staff and approved as part of Final Site Plan approval and would be made a condition thereof. The Village would therefore be able to enforce the provisions of the CMP throughout the construction process.
A Village-approved Erosion and Sediment Control Plan (ESCP), meeting State and Village requirements, would be implemented to avoid and mitigate potential impacts associated with the off-Site migration of sediment during construction.
Construction of the Proposed Project at 900 King Street would create daily construction-related traffic to and from the Project Site, including construction workers and the delivery of materials and equipment. A SYNCHRO analysis was conducted for the construction activity peak hours. The results of the analysis indicate that the construction traffic impacts would be less than the typical peak hours during the operation of the Proposed Project.
Strict adherence to the Village’s existing noise code could create the situation where, during times of predominantly exterior construction that is not allowed to start prior to 8:00 AM, construction workers would be arriving at the Project Site at the same time as the peak school arrival time. As
a potential mitigation measure, the Applicant proposes that the Village allow for a waiver of the 8:00 AM start time by no more than 1 hour (i.e., allow a start time of 7:00 AM) in cases where the Village Board finds that such a waiver could reduce potential traffic impacts at sensitive locations
within the Village, such as the Project Site.
Construction of the Proposed Project would incorporate measures to reduce fugitive dust and emissions from construction vehicles to the maximum extent practicable. Implementation of these
measures would avoid and minimize potential adverse air quality impacts during construction.
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Construction of the Proposed Project would be expected to result in elevated noise levels at nearby receptors and noise due to construction would at times be noticeable and highly objectionable.
However, at receptors other than those directly adjacent to the Project Site, noise from construction would be intermittent and of limited duration, and estimated construction noise levels would not exceed New York State Department of Environmental Conservation (NYSDEC) noise screening thresholds.
At receptors immediately adjacent to the Project Site, construction of the Proposed Project would result in large noise level increases and high noise levels during the most noise-intensive construction activities at the adjacent work areas. These noise levels would have the potential to occur for approximately 21 months. Therefore, in the Applicant’s opinion, construction noise at these receptors would rise to the level of significant, but temporary, adverse impact.
These temporary noise impacts would only occur during the daytime hours, Monday through Saturday, as allowed by the Village Noise Code. It is expected that construction would not regularly occur during evening and overnight hours or on Sundays, leaving the surrounding receptors unaffected by noise associated with construction of the Proposed Project at these times during which residences are most sensitive to noise. Finally, as noted in Chapter 17, “Alternatives,” the nature and magnitude of this temporary impact would be similar in all studied
alternatives to the Proposed Project, save the No Action alternative.
16.2. CONSTRUCTION PHASING
Construction of the Proposed Project would be completed in approximately 30 months and is expected to occur in approximately seven phases, which are summarized in this paragraph and described in more detail in the sections below. As shown in Figure 16-1, construction would begin with the installation of silt fencing, disconnection of utilities, demolition of the existing Site building,
asphalt and tree removal, and expansion of the detention pond. This phase is anticipated to take approximately 3 months. Once the building is demolished, road and Site utilities work would start, the garage foundation would be constructed, and the northern wings of the IL building would begin
construction. Construction of the proposed buildings would be separated into four phases with overlapping construction times: AL facility (construction would last approximately 14 months), IL center core (construction would last approximately 23 months), IL south wings (construction would
last approximately 14 months), and town houses (construction would last approximately 14 months). The final phase is the Site restoration phase, which would take place at the end of the building construction and is expected to last approximately 2 months. Since multiple phases would be
implemented simultaneously, it is anticipated that the maximum number of workers on-Site is expected to be 180 workers per day during construction months 20 and 21, and that the maximum number of truck trips would be 140 weekly trips during construction month 21 (see Figure 16-1).
As described in Chapter 4, “Geology, Soil, and Topography,” the Site grading design is anticipated to generate approximately 42,600 cubic yards of earthen cut material, and approximately 51,600 cubic yards of earthen fill material would be required, resulting in approximately 9,000 cubic yards of additional material to be brought to the Site by truck. Assuming 20-yard capacity trucks, a total of approximately 420 truck trips would be required to deliver this material. These trucks are accounted for in the estimated number of weekly truck trips described in more detail below.
During construction, the Site would be fenced off to ensure safety from construction activities. The pedestrian path leading from the Village buildings to Harkness Park and the Blind Brook High School
would be temporarily closed. Students and pedestrians would instead be directed to the existing sidewalk along King Street, where they would cross Arbor Drive at the existing signalized crosswalk,
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continue through the park or along King Street. At the end of the construction period, the pedestrian path on the Project Site would be restored and enhanced and would be re-opened to the public.
16.2.1. PHASE 1: DEMOLITION
Prior to the start of any construction activity or Site disturbance, a pre-construction meeting would be held with the contractor, the Village, and Project engineer to discuss construction
details, the approved CMP, which is described below, and the ESCP. The ESCP would detail how the Project Site and surrounding wetlands and waterways will be protected from erosion and sedimentation during construction activity when soil would be disturbed.
Phase 1 is anticipated to last 3 months. Construction would begin with the installation of security fencing at the access points to the Project Site and at the limits of disturbance as required to prevent unauthorized entry to construction areas, prevent access to areas that could be hazardous to the public, and to protect areas not proposed to be disturbed from damage from construction operations. Construction site lighting during the overnight
hours is not anticipated to be required. Security is expected to be provided through the use of fences and gates.
Stabilized construction entrance/exits (SCE) would be established to prevent tracking of
sediment outside of the Project Site. The construction entrance/exits would be constructed with 1- to 4-inch stone (or reclaimed or recycled concrete equivalent) layered over a filter fabric and would be at least 6 inches thick. The stabilized areas will be maintained regularly
to prevent sediment from being tracked onto public rights-of-way. The majority of the trucks and workers would access the Site through the existing parking lot main entrance east of the existing building. Depending on the type of delivery, a minority of trucks would use the
existing driveway into the site from Arbor Drive west of the parking lot entrance.
Once the construction fencing and the initial Site work has been performed, it is anticipated that construction would begin with the installation of silt fencing, disconnection of utilities, asphalt and tree removal, and expansion of the existing detention pond. The tree protection plan would also be implemented at this time, as described in Chapter 7, “Vegetation and Wildlife.”
The next step under this phase would be to demolish the existing building. Demolition would be conducted in accordance with the requirements of Chapter 107 “Demolition of
Buildings and Structures” of the Village Code. Demolition would begin by disconnecting all utility connections from the existing building and removing all appurtenances. This includes removal of the existing building and all structures, light fixtures and conduits,
walkways, and parking lots. Once the existing building and utilities are removed, the area for the proposed temporary sediment traps would be cleared and grubbed and top soil would be stockpiled on-Site.
As described in Chapter 15, “Hazardous Materials,” prior to the demolition of the building, asbestos-containing material (ACM) surveys would be conducted throughout the existing structure. Any ACM identified would be removed prior to demolition by a licensed asbestos
abatement contractor in accordance with applicable regulatory requirements. Demolition activities with the potential to disturb lead-based paint (LBP) would be performed in accordance with the applicable Occupational Safety and Health Administration (OSHA)
regulation (OSHA 29 CFR 1926.62—Lead Exposure in Construction). Finally, all on-Site hazardous materials, including petroleum products, cleaning fluids, and polychlorinated-biphenyls- (PCB) and mercury-containing lighting fixtures and other electrical equipment
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would be removed from the Site and disposed of in accordance with applicable regulatory requirements prior to the demolition of the existing Site building.
Construction equipment would initially be staged within the existing Site parking lot, and worker parking would also occur on the existing Site parking lot. At no time would worker parking, staging, or queuing of construction equipment occur on any public streets or
along Arbor Drive. Once the building has been demolished, construction workers would park within an area of the existing building slab, which would be prepared for use as a 150-space worker parking area (see Figure 16-2). It is anticipated that the maximum number of workers on-Site for this phase would be 20, and there would be an expected 25 truck trips to and from the Site weekly (see Figure 16-1).
16.2.2. PHASE 2: ROAD AND SITE UTILITIES
Once the building has been demolished, Phase 2 would include the excavation and construction of the garage foundation below the proposed IL facility, the construction of the interior road
loop, and the construction of new utilities for connections to the proposed buildings.
The construction of the road, site utilities, and underground garage would occur over an approximately 3-month period, with an anticipated 85, 130, and 40 weekly truck trips to
the Project Site. As described within the construction period impacts and mitigation section, no blasting is expected to occur during this phase of construction.
Contractor parking (150 parking spaces) would continue to be located on the western side
of the Site (same location as Phase 1 parking), and a material staging area would be located north adjacent to the contractor parking. Trucks and workers would use the interior roads for circulation, and enter the Site through the new entrances along Arbor Drive. The
northeastern entrance would only be used in case of emergencies (see Figure 16-3).
Phase 2 would last approximately 3 months. During this phase, it is expected that there would be approximately 50 workers on-Site daily (see Figure 16-1).
16.2.3. PHASE 3, 4, 5, AND 6: BUILDINGS CONSTRUCTION
Phases 3, 4, 5, and 6 would construct the garage and AL portion of the building, the northern and southern wings of the IL portion of the building, and townhouses. The major components of the building construction stage involve installation of utilities and infrastructure, pouring the foundations, erecting the structures of the buildings, interior finishing work, and landscaping. This would be the most intensive stage of the construction process where material deliveries would take place regularly.
It is not anticipated that construction of the Proposed Project would require materials
processing (i.e., rock crushing) on-Site. If materials processing is required during construction, a permit would be obtained from the Westchester County Department of Health (DOH). According to the Westchester County DOH Air Quality Program, the
minimum permit filing requirements needed in order to operate an approved portable rock crusher and screener on-Site are as follows:
• a licensed and New York State-registered Professional Engineer must prepare the applications;
• an application fee of $4,000 consisting of a one-time $1,000 processing fee and $1,000 operation permit fee for each year of the 3-year operation cycle;
• an authorization letter signed by the owner or owner’s representative authorizing the
Professional Engineer to file applications and plans on the owner’s behalf;
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• a notarized Certificate of Resolution form;
• an Environmental Assessment Form;
• calculations of air emissions generated from power generator, rock crusher(s), and
screener(s);
• proof of Workers’ Compensation and Disability Benefits Insurance; and,
• one completed copy of the Westchester County DOH Application for Certificate to Construct and Operate (Form R).
16.2.3.1. Phase 3: Assisted Living
The AL construction phase would last approximately 14 months and begin after the completion of Phase 2. Both the AL building and the underground
garage below the IL building would be finished. During this phase, the contractor parking area (150 parking spaces) and the material staging area would stay the same as Phases 1 and 2. Trucks and workers would use the
interior roads for circulation, and enter the Site through the new entrances along Arbor Drive. The northeastern entrance would only be used in case of emergencies (see Figure 16-4). During this phase, the maximum number of
workers on-Site would be approximately 180 workers during the last month of this phase (month 20 of construction) due to construction phase overlap between Phases 3, 4, 5, and 6. The maximum number of weekly truck
deliveries would be approximately 120 during month 14 of the entire construction. The number of weekly truck trips is anticipated to range between 25 and 120 during this construction phase (see Figure 16-1).
16.2.3.2. Phase 4: Independent Living Center Core
The IL center core construction phase would last a total of approximately 23 months and would be broken into two sub-phases. The first sub-phase would last 3 months and include the construction of the underground parking garage during Phase 2. The second sub-phase would last 20 months and include the building of the core section of the building, and start on month 10 of the construction duration. During the second sub-phase, the contractor parking area (150 parking spaces) and the material staging area would stay the same
as Phases 1, 2, and 3. Trucks and workers would use the interior roads for circulation, and enter the Site through the new entrances along Arbor Drive. The northeastern entrance would only be used in case of emergencies (see Figure 16-5). During this construction phase, the maximum number of workers on site would be approximately 180 workers during construction months 20 and 21 due to construction phases overlap between phases 3, 4, 5,
and 6. The maximum number of weekly truck deliveries would be approximately 140 during construction month 21 (see Figure 16-1).
16.2.3.3. Phase 5: Independent Living Center South Wings
The IL center south wings construction phase would last approximately 14 months and start during month 16 of the Proposed Project’s construction. During this phase, the contractor parking area would be located in the finished underground garage and the material staging area would be located south of the IL center core, as well as at the center of the townhouse clusters. Trucks and workers would use the interior roads for circulation, and enter the Site
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through the new entrances along Arbor Drive. The northeastern entrance would only be used in case of emergencies (see Figure 16-6).
16.2.3.4. Phase 6: Townhouses
The townhouses construction phase would last approximately 11 months and would not begin until month 18 of construction. At this point, the underground
garage would be completed and used for construction worker parking. The material staging area would be relocated from the western portion of the Site to the area in between the two southern IL wings as well as the culs de sac of each townhouse cluster. Trucks and workers would continue to use the interior roads for circulation, and enter the Site through the new entrances along Arbor Drive. The northeastern entrance would only be used in case of emergencies (see Figure 16-7). During this construction phase, the maximum number of workers on site would be approximately 180 workers during the last month of this phase (month 20 of construction) due to construction phase overlap between phases 3, 4, 5, and 6. The maximum number of weekly truck deliveries would be approximately 140 during month 21 due to construction phase overlap between
phases 3, 4, 5, and 6 (see Figure 16-1).
16.2.4. PHASE 7: SITE RESTORATION
Once building construction work is completed, all disturbed areas would be restored and
the Site would be landscaped according to the approved landscaping plan. This phase would last approximately 2 months. The construction workers would remove all fencing and restore the detention pond (see Figure 16-8). Construction workers would use the
parking, roads, and entrances already built on-Site. During this construction phase, the maximum number of workers on-Site would be approximately 120 workers during the first month of this phase (month 29 of construction) due to construction phase overlap
between phases 4, 5, 6, and 7. The maximum number of weekly truck deliveries would be approximately 30 during month 29 of the construction period (see Figure 16-1).
16.3. CONSTRUCTION PERIOD IMPACTS AND MITIGATION
Adverse impacts from the construction of the Proposed Project would be avoided and minimized through the implementation of a detailed CMP. The CMP would be prepared by the Applicant, in close coordination with Village staff and consultants, and would be approved as part of the final
Site Plan approval and be made a condition thereof. The Village would, therefore, be able to enforce the provisions of the CMP throughout the construction process. The CMP would provide for implementation of the Stormwater Pollution Prevention Plan (SWPPP) and ESCP, as well as
the measures to avoid impacts to traffic, air quality, and noise, described below.
16.3.1. EROSION AND SEDIMENT CONTROL PLAN
Potential impacts associated with construction activities include sediment deposition, rilling and erosion, and the potential for causing turbidity within receiving waterbodies. To avoid an adverse impact from soil erosion, the Proposed Project would conform to the
requirements of NYSDEC State Pollution Discharge Elimination System (SPDES) General Permit for Stormwater Discharges Associated with Construction Activity Permit No. GP-0-15-002, the “New York State Standards and Specifications for Erosion and
Sediment Control,” dated July 2016, and Chapter 118 “Erosion and Sediment Control” of the Village Code. The permit requires that proposed projects disturbing more than 1 acre of land must develop a SWPPP, containing both temporary erosion control measures
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during construction and post-construction stormwater management practices to avoid flooding and water quality impacts in the long term.
An ESCP is included with the full size set of drawings (see Appendix A-4). The ESCP depicts the measures to be utilized to control erosion and sediment leaving the Site. These measures, described in more detail below, include two SCEs, the limit of disturbance
beyond which no soil disturbance is to occur, the installation of silt fencing, inlet protection and other measures as described below, which would be used throughout the construction period to minimize the potential for erosion and sedimentation impacts from construction of the Proposed Project.
• SCE—The SCEs would have a stabilized aggregate pad underlain with filter cloth to
prevent construction vehicles from tracking sediment off-Site. SCEs would be located at specific transition areas between concrete/asphalt to exposed earth.
• Silt Fence—Silt fence would be installed on the down gradient edge of disturbed areas parallel to existing or proposed contours or along the property line as perimeter control. Silt fence would be used where stakes can be properly driven into the ground
as per the Silt Fence detail in the NYSDEC Standards and Specifications for Erosion and Sediment Control and as shown on the full sized drawings. Silt fence controls sediment runoff where the soil has been disturbed by slowing the flow of water and
encouraging the deposition of sediment before the water passes through the straw bale or silt fence. Built-up sediment would be removed from silt fences when it has reached one-third the height of the bale/fence and would be properly disposed.
• Storm Drain Inlet Protection—Inlet protection would be installed at all inlets where the surrounding area has been disturbed. The inlet protection would be constructed in
accordance with NYSDEC Standards and Specifications for Erosion and Sediment Control. Typically, they would be constructed to pass stormwater through, but prevent silt and sediment from entering the drainage system.
• Stockpile Detail—Stockpiled soil would be protected, stabilized, and sited in accordance with the Soil Stockpile Detail, as shown on the detail sheets. Soil
stockpiles and exposed soil would be stabilized by seed, mulch, or other appropriate measures when activities temporarily cease during construction for 7 days or more in accordance with NYSDEC requirements.
• Dust Control—During the demolition and construction process, debris and any disturbed earth would be wet down with water, if necessary, to control dust. After
demolition and construction activities, all disturbed areas would be covered and/or vegetated to provide for dust control on the Site.
• Temporary Seeding and Stabilization—In areas where demolition and construction activities, clearing, and grubbing have ceased, temporary seeding or permanent landscaping would be performed to control sediment laden runoff and provide
stabilization to control erosion during storm events. This temporary seeding/stabilization or permanent landscaping would be in place no later than 14 days after demolition and construction activity has ceased.
• Sump Pit—Depending on the results of the geotechnical investigations, a temporary pit may be necessary to trap and filter water for pumping to a suitable discharge area. The
purpose would be to remove excessive water from excavations. Sump pits would be constructed when water collects during the excavation phase of construction.
• Dewatering—Depending on the results of the geotechnical investigations, there may be areas of construction where the groundwater table would be intercepted and
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dewatering activities would take place. Site-specific practices and appropriate filtering devices would be employed by the contractor so as to avoid discharging
turbid water to the surface waters of the State of New York.
• Temporary Sediment Basin—The purpose of a sediment basin is to intercept
sediment-laden runoff and filter the sediment laden stormwater runoff leaving the disturbed area in order to protect drainage ways, properties, and rights-of-way below the sediment basin. The basin would be installed down gradient of construction
operations that expose critical areas to soil erosion. The trap would be maintained until the disturbed area is protected against erosion by permanent stabilization.
• Materials Handling—The contractor would store construction and waste materials as far as practical from any environmentally sensitive areas (e.g., wetlands). Where possible, materials would be stored in a covered area to minimize runoff. The
contractor would incorporate storage practices to minimize exposure of the materials to stormwater, and spill prevention and response where necessary. Prior to commencing any construction activities, the contractor would obtain all necessary
permits or verify that all permits have been obtained.
A continuing maintenance program would be implemented for the control of sediment transport and erosion control after construction and throughout the useful life of the project.
With the implementation and continuing maintenance of the ESCP that would be approved by the Village and the NYSDEC, construction of the Proposed Project would not be expected to result in a significant adverse impact from sedimentation or erosion.
16.3.2. TRAFFIC AND TRANSPORTATION
16.3.2.1. Construction Period Trip Generation
Construction of the Proposed Project at 900 King Street would create daily construction-related traffic to and from the Project Site, including construction workers and the delivery of materials and equipment. The numbers and types of vehicles would vary depending on the phase of construction, as described above. All construction equipment, materials, deliveries, and worker parking would be accommodated on-Site. There would
be no construction equipment, truck, material, or worker parking, queuing, or staging permitted on Arbor Drive at any time. This requirement, as well as a detailed plan that delineates areas of construction worker parking, truck
queuing and unloading, and material and equipment staging, would be included in the CMP.
Manpower for typical construction projects fluctuates over the duration of the
project in a bell-shaped curve. Beginning and ending months have relatively low manpower and, during the middle of the schedule, manpower peaks. Approximately 20–50 workers would be expected on-Site during the first 10
months of construction. Months 11–16 would have 100–120 workers on-Site. Months 17–27 would have approximately 150 workers on-Site, with months 20 and 21 peaking at approximately 180 workers on-Site. The Construction Manager for the Proposed Project, A.P. Construction, Inc., estimates that at least 20 percent of the Site’s construction workers would arrive by van, with two or three occupants per van. This would be especially true for many of the specialized trades, including plumbing, electrical, and interior finishers.
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These specialty trades are most active during the latter portion of construction when the number of on-Site workers peaks.
16.3.2.2. Construction Traffic Analysis
A quantitative analysis was conducted to identify the potential for construction related trips to impact the area’s roadways (see Appendix F). To provide the
most conservative analysis, the study analyzed the construction time period during which the most number of on-Site workers would be present—months 20 and 21. The study did not take any credits for potential carpooling, and assumed that all 180 workers would arrive and depart in separate vehicles during the peak hour. The peak hours of 6:00 AM to 7:00 AM and 3:30 PM to 4:30 PM were chosen for this analysis. While the Village’s Noise Code (Chapter 154) limits construction that makes audible noise beyond the Project Site boundary to after 8:00 AM, during this time of peak construction, a
substantial number of the workers on-Site would be working interior to the buildings and thus would not be limited to an 8:00 AM start time. Rather, a more typical 7:00 AM start time is assumed for this analysis.1
Utilizing turning movement traffic counts for the study area intersections and the New York State Department of Transportation (NYSDOT) historical count data, the Year 2018 Existing Traffic volumes for the 6:00 AM–7:00 AM hour and 3:30
PM–4:30 PM hour were developed. Following the same methodology described in Chapter 12, “Traffic and Transportation,” the Year 2025 No Build Condition and Year 2025 Build Condition with construction activity were developed. A
SYNCHRO analysis was conducted for the construction activity peak hours. The results of the analysis indicate that the construction traffic impacts would be less than the typical peak hours during the operation of the Proposed Project.
16.3.2.3. Construction Truck Traffic
Construction truck movements would be spread throughout the day and would generally occur between the hours of 7:30 AM and 3:30 PM, depending on the period of construction. Heavy construction equipment is typically brought to the Site at the beginning of the project and kept on-Site
for the duration of the project, thereby minimizing trips. During most of the construction period, it is estimated that only approximately 15–30 trucks per week would access the Site. This translates to an average of 2–5 trucks per
day. There would be three peak times of truck activity, where the number of trucks accessing the Site would rise to between 65 and 140 trucks per week, or approximately 11–23 trucks per day. To the extent possible, truck trips
would be encouraged not to coincide with the school’s entry and exit hours.
During Phases 1 and 7 of construction, dump trucks and equipment delivery trucks (e.g., flat bed) would be the predominant types of trucks accessing the
1 At other times during construction, such as the beginning stages of construction, work would be primarily exterior to the buildings and, according to the existing Village Noise Code, would not be allowed to begin until 8:00 AM. However, during these times, significantly fewer workers would be working on-Site. Therefore, it is the Applicant’s opinion that the construction-period traffic study presents the worst-case scenario.
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Site. During Phases 2–6, material delivery trucks (e.g., “18-wheelers”), concrete delivery trucks and pumper trucks, and portable cranes, lifts, and
lulls would also access the Site.
Construction trucks would be expected to use one of the following routes to access the Project Site:
• I-684 Southbound to Manhattanville Road to Purchase Street to Anderson Hill Road to King Street;
• I-287 eastbound to Westchester Avenue and Anderson Hill Road to King Street;
• I-95 northbound to Boston Post Road (US Route 1) to King Street or I-287 to Boston Post Road (US Route 1) to King Street; or,
• I-95 southbound to Exit 2 to Delavan Avenue to North Main Street (US Route 1) to King Street via Willet Avenue or Adee Street.
The use of these major area roadways for construction trucks would not, in
the Applicant’s opinion, be expected to create a significant adverse impact to the roadway network, as these roads typically carry heavy vehicles. With respect to Arbor Drive, the Applicant would monitor the condition of Arbor Drive throughout the construction period and make necessary repairs, such as repaving, at the conclusion of the construction period.
At the Village’s request, the Applicant evaluated the potential for an alternative construction entrance to the Project Site that would not use the Site’s Arbor Drive (e.g. southern) frontage. Access from the north (e.g.,
Hutchinson River Parkway) or west (e.g., The Arbors) of the Site is not feasible. Therefore, access from the east is the only other potential option. The Site’s King Street frontage is currently unimproved, vegetated, and is at
a significantly higher elevation than the Project Site or King Street. Constructing a new entrance at this point would require extensive Site disturbance and, with the location of the current traffic signal at Arbor Drive,
would not be practical. The only other potential option for construction access would therefore be through the Village’s property. Specifically, it may theoretically be feasible to construct an entrance into the Project Site that used
the driveway in between the Rye Brook Fire Department (RBFD) building and Village Hall for access to King Street. Such an access point would, however, interfere with Village operations, including RBFD. Finally, as discussed above, construction of the Proposed Project is not anticipated to have a significant adverse impact on Arbor Drive, which would warrant the use of the Village property for construction site access.
16.3.2.4. Potential Traffic Impacts on Blind Brook Middle/High School
The Blind Brook Middle School and Blind Brook High School have a start time
of 7:45 AM and a dismissal time of 2:40 PM. Dismissal occurs prior to the typical end of the construction day. As such, the afternoon peak construction hour would occur after the peak school dismissal traffic hour. With respect to
the morning, the peak school arrival time is assumed to be between 7:00 AM and 7:45 AM. As stated above, the Village’s Noise Code (Chapter 154) restricts construction noise audible beyond the property line until after 8:00 AM. The
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Applicant notes that 8:00 AM is not typical of construction start times in the region and is out of sync with the larger construction industry’s typical
schedule. In general, construction workers arrive on-Site prior to the beginning of the regional commuter rush, which typically begins in earnest around 7:00 AM. In typical scenarios, therefore, construction worker trips generally peak
between 6:00 AM and 7:00 AM and therefore occur outside of the morning peak hour and do not coincide with school start times.
Strict adherence to the Village’s existing noise code could create the situation where, during times of predominantly exterior construction that is not allowed to start prior to 8:00 AM, construction workers would be arriving at the Project Site at the same time as the peak school arrival time. As a potential mitigation measure, the Applicant proposes that the Village allow for a waiver of the 8:00 AM start time by no more than 1 hour (i.e., allow a start time of 7:00 AM) in cases where the Village Board finds that such a waiver could reduce potential traffic impacts at sensitive locations within the Village, such as the Project Site.
In 2017, the Blind Brook–Rye Union Free School District (BBRUFSD)
approved a bond for renovations to the Bruno M. Ponterio Ridge Street School and the Blind Brook Middle School and High School. Construction of these improvements is anticipated to begin at the end of the 2018/2019 school year
and conclude immediately prior to the beginning of the 2020/2021 school year.2 While most construction is planned for the elementary school, several improvements are planned for the middle and high schools, including the
construction of a new laboratory space, enclosing the corridors between the middle and high schools, replacing the fire alarm systems, replacing the windows and installing weatherization improvements in the high school, and renovating the high school custodial room for classroom space. There is the potential for the construction of the Proposed Project and the middle school and high school improvements to occur simultaneously. It is anticipated that the construction access for the middle and high schools will be from their signalized intersection and the Project Site would have construction access
from the Arbor Drive signalized intersection.
Notwithstanding the foregoing, applicable provisions of the CMP would be discussed with BBRUFSD officials prior to the commencement of
construction to minimize the potential impacts to students and teachers. It is expected that there would be continuous communication between the Applicant’s contractor and BBRUFSD’s contractor and officials regarding
potential traffic along King Street and other impacts.
16.3.3. AIR QUALITY
The construction of the Proposed Project requires the use of both non-road construction
equipment and on-road vehicles. Non-road construction equipment includes equipment operating on-Site such as cranes, loaders, and excavators. On-road vehicles include construction delivery trucks, dump trucks, and construction worker vehicles arriving to
2 BBRUFSD. https://www.blindbrook.org/cms/lib/NY01913277/Centricity/Domain/4/Bond%20Project%20Schedule.pdf
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and departing from the Project Site as well as operating on-site. Emissions from non-road construction equipment and on-road vehicles have the potential to affect air quality. In
addition, emissions from dust-generating construction activities (i.e., truck loading and unloading operations) also have the potential to affect air quality. There are several factors for consideration in determining whether a quantified on-site and/or off-site construction
impact assessment for air quality is appropriate. These factors can include the use of emission control measures, the duration and intensity of construction activities, the location of nearby sensitive receptors, and Project-generated, construction-related vehicle trips. As required by the approved Draft Environmental Impact Statement (DEIS) Scoping Document (see Appendix A-1), a qualitative analysis of temporary air quality impacts from construction of the Proposed Project was conducted.
16.3.3.1. Emission Control Measures
Air quality impacts associated with construction activities are typically the result of fugitive dust or emissions from vehicles or equipment. Fugitive dust can result from earth moving, including grading and excavation, and from driving construction vehicles over dry, unpaved surfaces. While a large
proportion of fugitive dust would be of relatively large particle size and would be expected to settle within a short distance of being generated and thus not affect off-Site receptors, measures to minimize and avoid this potential
impact to the maximum extent practicable would be incorporated into the Proposed Project and would be included in the CMP, which would be reviewed and approved by the Village during Site Plan approval. The erosion
and dust control procedures that would be implemented would include:
• Minimizing the area of soil that is disturbed at any one time;
• Minimizing the amount of time during which soils are exposed;
• Installing truck mats or anti-tracking pads at egress points to clean the
trucks’ tires prior to leaving the Project Site;
• Watering of exposed areas during dry periods;
• Using drainage diversion methods (e.g., silt fences) to minimize soil erosion during Site grading;
• Covering stored materials with a tarp to reduce windborne dust;
• Limiting on-Site construction vehicle speed to 5 miles per hour (mph);
and
• Using truck covers/tarp rollers that cover fully loaded trucks and keep
debris and dust from being expelled from the truck along its haul route.
Vehicle emissions from construction vehicles and equipment have the potential to result in elevated levels of nitrogen oxides (NOx), particulate
matter (PM), and CO. The greatest potential for impact is typically associated with heavy duty equipment that is used for short durations. The following measures would be incorporated into the CMP, which would be reviewed and
approved by the Village during Site Plan approval, to minimize emissions from construction vehicles and equipment to the maximum extent practicable:
• Ultra-low sulfur diesel would be utilized for all construction equipment and vehicles;
• All equipment would be properly maintained; and
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• Idling of construction or delivery vehicles or other equipment would not
be allowed when the equipment is not in active use.
Implementation of the measures listed above would avoid and minimize potential adverse impacts to air quality during construction of the Proposed Project.
16.3.3.2. Duration and Intensity of Construction Activities
Construction of the Proposed Project, as is the case with any construction project, would result in temporary disruption to the surrounding area. The
construction duration for the entire Project Site, is anticipated to be completed over a period of approximately 30 months. However, the most intense construction activities in terms of air pollutant emissions (demolition,
excavation, and foundation activities where the largest number of large non-road diesel engines such as excavators, dozers, graders and loaders would be employed) is anticipated only to occur over a period of approximately 6 months
for demolition and excavation across the entire Project Site with additional periods of foundation activities for each building (anticipated to take up to 3 month for the largest building). These periods of foundation activities would be phased and not occur simultaneously. Construction sources would move around the Project Site over the construction period such that the air pollutant concentration increments due to construction of the proposed project would not persist in any single location. The other stages of construction, including superstructure, exteriors, and interiors and finishing would result in substantially
lower air emissions since they would require fewer pieces of heavy-duty diesel equipment and would not involve soil disturbance activities that generate dust emissions. In addition, interior construction work would generally occur within
an enclosed building, thereby shielding nearby sensitive receptors.
The approach and procedures for constructing the proposed buildings would be typical of the methods utilized in other building construction projects
throughout the region and therefore would not be considered out of the ordinary in terms of intensity. The air pollutant emission levels associated with construction of the Proposed Project are typical of ground-up building
construction in the region that would require demolition, excavation, and foundation construction (where large equipment such as drill rigs, excavators, and loaders would be employed). Overall, emissions associated with the construction of the proposed project would likely be lower than a typical project due to the emission control measures to be implemented during construction (see “Emission Control Measures”).
16.3.3.3. Location of Nearby Sensitive Receptors
The area near the Project Site contains a mix of residential, commercial,
community facility, and institutional uses. Although there are sensitive receptors locations near the Project Site, in particular the residential neighborhood to the southwest of the Project Site as well as Blind Brook
Middle School and High School and Harkness Park to the southeast, these locations would be located over 170 feet from areas of construction on the Project Site. As discussed under “Emission Control Measures,” measures
would be taken to reduce pollutant emissions during construction. For example, a watering program would be implemented to minimize dust
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emissions from construction activities. Furthermore, the construction areas would be fenced off, which would serve as a buffer between the emission
sources and nearby sensitive receptor locations. As described above under “Duration and Intensity of Construction Activities,” sources would move throughout the Project Site over the construction period such that the air
pollutant concentration increments due to construction of the Proposed Project would not persist in any single location and no portion of the adjacent sensitive receptors would be subject to the full effects of construction for the entire construction period. In addition, the approach and procedures for constructing the proposed buildings would be typical of the methods utilized in other building construction projects throughout the New York City area and therefore would not be considered out of the ordinary in terms of intensity. Therefore, due to these reasons, potential concentration increments from on-Site construction sources at nearby sensitive receptor locations would be substantially reduced and would not, in the Applicant’s opinion, rise to the level of a significant adverse impact.
16.3.3.4. On-Road Sources
Construction of the Proposed Project is anticipated to result in a maximum of 24 trucks per day during the worst-case overlap of construction activities for the IL
building and the residential townhouses would occur. Over the worst-case annual period, construction activities to result in an average of 11 trucks per day.
Construction worker commuting trips and construction truck deliveries would
generally occur during off-peak hours. Furthermore, construction-generated truck trips would be distributed over the entire work day and would not arrive at the Project Site within a single hour. When distributed over the
transportation network, the construction trip increments would not concentrate at any single location outside of the Project Site. In addition, construction-generated traffic impacts would be less than the typical peak hours during operation of the Proposed Project—which did not result in an exceedance of NYSDOT’s screening criteria for mobile source air quality impacts. Therefore, no further mobile source analysis is required.
16.3.3.5. Conclusion
Based on the analyses provided and implementation of the emissions
reduction program described above and in the Applicant’s opinion, construction of the Proposed Project would not result in any significant adverse construction air quality impacts, and no further analysis is required.
16.3.4. NOISE
Potential temporary impacts on community noise levels during construction of the Proposed Project could result from noise due to construction equipment operation and from noise due
to construction vehicles and delivery vehicles traveling to and from the Project Site. Noise levels at a given location are dependent on the type and amount of construction equipment being operated, the distance from the construction site, and any shielding effects (from
structures such as buildings, walls, or barriers). Noise levels caused by construction activities would vary widely, depending on the stage of construction and the location of the construction relative to receptor locations as described below. Construction noise levels
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would fluctuate during the construction period at each receptor, with the greatest levels of construction noise occurring for limited periods during construction. Excavators, loaders,
dozers, and chippers during Site clearing and excavation activities would likely be the most substantial construction noise sources.
16.3.4.1. Construction Noise Analysis Fundamentals
Construction activities increase noise levels as a result of (1) the operation of construction equipment on-Site; and (2) the movement of construction-related vehicles (i.e., worker trips, and material and equipment trips) on the roadways to and from the construction site. The effect of each of these noise sources was evaluated.
Noise from the on-Site operation of construction equipment at a specific receptor location near a construction site is generally calculated by computing the sum of the noise produced by all pieces of equipment operating at the construction site. For each piece of equipment, the noise level at a receptor location is a function of the following:
• The noise emission level of the equipment (see Table 16-1 for typical noise levels associated with various construction phases);
• The distance between the piece of equipment and the receptor;
• Topography and ground effects; and
• Shielding.
Table 16-1 Typical Construction Phase Noise Emission Levels (dBA)
Activity Building Type Typical Leq Noise Level at 50 feet1
Ground Clearing Domestic Housing (1 to 2 story) 83 Office, Hotel, Hospital, School, Public Works 84
Excavation Domestic Housing (1 to 2 story) 88 Office, Hotel, Hospital, School, Public Works 89
Foundations Domestic Housing (1 to 2 story) 81 Office, Hotel, Hospital, School, Public Works 78
Erection Domestic Housing (1 to 2 story) 81
Office, Hotel, Hospital, School, Public Works 87
Finishing Domestic Housing (1 to 2 story) 88
Office, Hotel, Hospital, School, Public Works 89
Source: “Noise from Construction Equipment and Operations, Building Equipment and Home Appliances.” US Environmental Protection Agency. Bolt, Beranek and Newman. December 31, 1971. Table 1a: “Typical Ranges of Noise Levels at Construction Sites with a 50 dB(A) Ambient typical of Suburban Residential Areas.”
Similarly, noise levels due to construction-related traffic are a function of the following:
• The noise emission levels of the type of vehicle (e.g., auto, light-duty truck, heavy-duty truck, bus, etc.);
• Volume of vehicular traffic on each roadway segment;
• Vehicular speed;
• The distance between the roadway and the receptor;
• Topography and ground effects; and
• Shielding.
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16.3.4.2. Construction Noise Analysis Methodology
In this analysis, all measured noise levels are reported in dBA or A-weighted
decibels, as described in Appendix G. In addition, the maximum 1-hour equivalent sound level (Leq(1)) has been selected as the noise descriptor to be used in the noise impact evaluation. The Leq(1) is the noise descriptor recommended by
NYSDEC for noise impact evaluation, and is used to provide an indication of highest expected sound levels (see Appendix G for more detail).
The construction noise analysis consists of the following:
• Identification of sensitive noise receptor locations3 near the Project Site.
• Identification of noise reduction measures that would be employed during construction of the Proposed Project.
• Consideration of potential noise impacts from mobile sources.
• Analysis of potential noise impacts from operation of construction equipment at the Project Site over the course of the construction of the
Proposed Project. The analysis looks first at the intensity of noise levels during construction, then assesses the potential duration of those noise levels, and finally makes a determination of the potential for impact. Duration of construction noise is assessed based on the preliminary construction schedule described above.
• Analysis of potential noise impacts from operation of construction equipment at surrounding receptors.
16.3.4.3. Construction Noise Impact Criteria
For purposes of this impact assessment, construction that would result in an increase of more than 6.0 dBA in ambient Leq(1) noise levels at receptor sites and produce ambient noise levels of more than 65 dBA at residences over a prolonged period of time would be considered to be a significant adverse noise impact resulting from the Proposed Project. These criteria are consistent with the NYSDEC guidance document (see Appendix G).
The Village Noise Control Law, Chapter 158 of the Code of the Village of Rye Brook, specifies acceptable hours of construction that makes noise
audible beyond the property line on weekdays between 8:00 AM and 6:00 PM, on Saturdays between 9:00 AM and 4:00 PM and prohibits construction equipment operation on Sundays and holidays.
The average ability of an individual to perceive changes in noise levels is well documented (see Table 16-2). Generally, changes in noise levels less than 3 dBA are barely perceptible to most listeners, whereas 10 dBA changes are
normally perceived as doublings (or halvings) of noise levels. These guidelines permit direct estimation of an individual’s probable perception of changes in noise levels.
3 A sensitive receptor location is an area where human activity may be adversely affected by elevated noise levels, including residences, parks, churches, etc.
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Table 16-2 Average Ability to Perceive Changes in Noise Levels
Change (dBA) Human Perception of Sound
2-3 Barely perceptible 5 Readily noticeable
10 A doubling or halving of the loudness of sound 20 A "dramatic change"
40 Difference between a faintly audible sound and a very loud sound
Sources: Bolt Beranek and Neuman, Inc., Fundamentals and Abatement of Highway traffic Noise, Report No. PB-222-703. Prepared for Federal Highway Administration, June 1973.
16.3.4.4. Noise Receptor Locations
The Site is bounded by the Hutchinson River Parkway to the north, residences and municipal buildings to the east, Arbor Drive to the South, and The Arbor townhouse community to the west. The area surrounding the Project Site is a mix of predominantly residential and educational uses, with some open space uses.
The noise receptors closest to the proposed construction site are listed in Table 16-3.
Table 16-3
Construction Noise Receptor Areas
Receptor(s) Land Use(s) Relationship to Proposed Construction Work Areas
Arbors Condos (North Side of Ivy Hill Crescent) Residential 50 feet south of Townhouse Work Area Arbors Condos (South Side of Ivy Hill Crescent) Residential 200 feet south of Townhouse Work Area Arbors Condos (South Side of Ivy Hill Lane) Residential 200 feet south of Townhouse Work Area Arbors Condos (North Side of Brush Hollow Crescent) Residential 300 feet south of Townhouse Work Area
Blind Brook High School Education 50 feet south of Townhouse Work Area Blind Brook Middle School Education 400 feet south of Townhouse Work Area 942 King Street (Residences west of King Street) Residential 60 feet north of Assisted Living Work Area
947 King Street (Residences east of King Street) Residential 260 Feet north of Assisted Living Work Area
The Ridge Street Country School Residential 200 feet north of Independent Living Core Work Area
446 North Ridge Street (Residences North of Hutchinson River Parkway) Residential 400 feet north of Independent Living Core Work Area
14 Walker Court (Residences East of King Street south of Arbor Drive) Residential 180 feet east of Independent Living south Wings Work Area
109 Glenville Street Residential 650 feet east of Independent Living south Wings Work Area
16.3.4.5. Noise Reduction Measures
The following noise control measures would be implemented during the construction of the Proposed Project and have the potential to reduce potential noise effects on the surrounding receptors. These measures would include a
variety of source and path controls. Implementation of all the noise reduction measures would result in approximately 7 to 10 dBA noise level reduction at construction noise receptors.
In terms of source controls (i.e., reducing noise levels at the source or during the most sensitive time periods), the following measures would be implemented:
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• As early in the construction period as logistics would allow (likely by the
start of the superstructure phase of construction pending service provisions from Con Edison), diesel- or gas-powered equipment would be replaced with electrical-powered equipment such as welders, water
pumps, bench saws, and table saws (i.e., early electrification) to the extent feasible and practicable;
• Where feasible and practicable, the construction site would be configured to minimize back-up alarm noise. In addition, all trucks would not be allowed to idle more than 3 minutes at the construction site; and
• Contractors and subcontractors would be required to properly maintain their equipment and mufflers.
In terms of path controls (e.g., placement of equipment, implementation of barriers or enclosures between equipment and sensitive receptors), the following measures for construction would be implemented to the extent feasible and practicable:
• Where logistics allow, noisy equipment, such as cranes, concrete pumps, concrete trucks, and delivery trucks, would be located away from and shielded from sensitive receptor locations;
• Noise barriers constructed from plywood or other materials surrounding the construction site would be utilized to provide shielding. The barriers
would be at least 12 feet tall. Where logistics allow, truck deliveries would take place behind these barriers; and
The feasibility and potential effectiveness of these measures will be evaluated
to determine whether noise levels at surrounding receptors resulting from construction of the Project could be substantially reduced.
16.3.4.6. Mobile Source Construction Noise Analysis
Throughout the construction period, vehicles (construction-related trucks and vehicles driven by workers) would travel near the Project Site. As described above, the amount of traffic generated by the construction of the Proposed Project would be low compared with existing traffic volumes on the major feeder streets in the area and would be distributed amongst the different routes to and from the
Project Site. In addition, construction-generated traffic impacts would be less than the typical peak hours during operation of the Proposed Project, which was shown in Chapter 14, “Noise,” not to have a significant noise impact on sensitive
receptors. Accordingly, construction-generated traffic on roadways to and from the project sites would not have the potential to result in significant adverse construction noise impacts at locations away from the construction work areas
(i.e., at locations other than the areas specified above as receptors).
16.3.4.7. On-Site Construction Noise Analysis
As discussed above, the on-Site construction noise analysis looks first at the
intensity of noise levels during construction, then assesses the potential duration of those noise levels, and finally makes a determination of the potential for impact.
Overview of Construction Activities
The overall construction period of the Proposed Project is anticipated to be less than 3 years. The most noise-intensive construction activities (demolition, site
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clearing, leveling and foundation work when dominant noise equipment such as excavators are used on the construction site) are anticipated to occur for only a
portion of the duration—i.e., 2 to 3 months for each phase. Demolition, site clearing, and leveling activities associated with the Proposed Project would not be substantial and are anticipated to occur for less than 3 months at the start of
construction. Foundation work would occur for approximately 2 to 3 months at each construction phase area. Framing and roofing erection, which would be expected to last approximately 5 to 8 months for the AL and IL building and up to approximately 2 months for the townhouses, would require less heavy construction equipment as compared to the demolition, site clearing, leveling, and foundation work.
Intensity of Construction Noise from On-Site Sources
As described above, noise levels resulting from each type of construction
activity were projected at receptors throughout the study area based on distance and shielding provided by existing buildings or project elements already constructed. Receptors further away from the construction work areas, i.e.,
more than approximately 500 feet away, would experience construction noise levels in the low to mid-50s dBA, comparable to or lower than measured existing noise levels throughout much of the study area. Consequently,
receptors further from the Project Site than those discussed below would not have the potential to experience significant adverse construction noise impacts. Noise receptors closer to the Project Site are discussed further below.
The projected maximum noise levels during construction, taking into account the implementation of the noise reduction measures listed above at each of the receptor areas described above are summarized in Table 16-4. The construction noise estimates for the full construction period are shown in Appendix J. The noise estimates presented below are for noise levels exterior to the receptor. Noise levels interior to a structure would be significantly lower than the levels presented below due to the attenuation provided by building walls and windows (approximately 25 dBA lower for typical façade construction with a closed-
window condition). Typical façade construction, including insulated glass windows and some kind of alternate means of ventilation (i.e., air conditioning) would be expected to provide approximately 25 dBA reduction in interior noise
levels compared to exterior levels for a closed-window condition.
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Table 16-4 Estimated Maximum Construction Noise Summary (in dBA)
Receptor Area
Existing Maximum Construction Noise Levels
Leq Leq Increase
Arbors Condos (North Side of Ivy Hill Crescent) 58.1 79.0 20.9 Arbors Condos (South Side of Ivy Hill Crescent) 58.1 66.0 7.9 Arbors Condos (South Side of Ivy Hill Lane) 58.1 69.1 11.0 Arbors Condos (North Side of Brush Hollow Crescent) 58.1 57.4 2.7 Blind Brook High School 59.0 80.0 21.0 Blind Brook Middle School 59.0 63.0 4.0 942 King Street (Residences west of King Street) 68.7 84.0 15.3
947 King Street (Residences east of King Street) 68.7 70.1 1.4
The Ridge Street Country School 61.8 69.4 7.6
446 North Ridge Street (Residences North of Hutchinson River Parkway) 61.8 65.1 3.3 14 Walker Court (Residences East of King Street south of Arbor Drive) 70.0 72.8 2.8 109 Glenville Street 70.3 70.6 0.3
The maximum predicted noise levels shown in Table 16-4 would occur at times during the most noise-intensive activities of construction, which would
not occur every day during the construction period, and would not occur during every hour on days when those activities are underway. During hours when the loudest pieces of construction equipment are not in use, receptors
would experience lower construction noise levels. As described below, construction noise levels would fluctuate during the construction period at each receptor, with the greatest levels of construction noise occurring for
limited periods during construction.
The Arbors Condos (North Side of Ivy Hill Crescent)
As shown in Table 16-4, residents in The Arbors community along the north
side of Ivy Hill Crescent immediately adjacent to the Project Site would experience high levels of construction noise and increases in noise level that would be considered highly objectionable at times during the most noise-intensive construction activities. Maximum Leq(1) noise levels at this receptor resulting from construction would be in approximately the high 70s dBA, resulting in noise level increases of up to approximately 21 dBA.
The maximum construction noise level increases, between 17 to 21 dBA, would occur during portions of the approximately 3 months of road and utilities installation and parking garage foundations construction, portions of the approximately 2 months during framing and roofing construction at the AL facility and IL center core and for portions of the approximately 2 months during
the overlap of interior and exterior finishing at the AL facility and IL center core and framing and roofing construction at the IL south wings and townhouses. Construction noise levels in the mid-60s to mid-70s dBA, resulting in noise level
increases between approximately 8 and 16 dBA, would occur intermittently over the course of another 13 months during the construction period.
During the remainder of the construction period, construction noise levels
would remain below the 65 dBA NYSDEC recommended exterior noise
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levels and the 6 dBA noise increment threshold. Consequently, while construction noise levels would not persist at their maximum level throughout
all construction activities, construction noise levels are predicted to exceed the NYSDEC noise thresholds during portions of approximately 20 months during construction of the Proposed Project.
As stated above, the noise level estimates presented above are for noise levels exterior to the townhouses. Noise levels interior to the townhouses would be significantly lower than the maximum levels presented above due to the attenuation provided by building walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition). However, given the magnitude and duration of construction noise levels, noise from construction of the Proposed Project would, in the Applicant’s opinion, constitute a significant, but temporary, adverse impact at this receptor. As noted in Chapter 17, “Alternatives,” the nature and magnitude of this temporary impact would be similar in all studied alternatives to the Proposed Project, save the No Action alternative.
The Arbors Condos (South Side of Ivy Hill Crescent)
As shown in Table 16-4, the residences in The Arbors community along the south side of Ivy Hill Crescent would experience increases in noise levels of up to
approximately 8 dBA, which would be readily noticeable during the most noise-intensive construction activities. Maximum Leq(1) noise levels at this receptor resulting from construction would be 1 dBA above the NYSDEC recommended
maximum noise level for residential uses of 65 dBA. The maximum construction noise levels would occur during portions of the approximately 3 months of road and utilities installation and parking garage foundations construction and portions of the approximately 2 months of framing and roofing construction at the AL facility and IL center core. Construction noise levels during the remaining 26 months of construction may be noticeable at times, however, total noise levels would remain below the NYSDEC recommended exterior noise level of 65 dBA and the 6 dBA noise increment threshold.
The noise level estimates are for noise levels exterior to the townhouses. Noise levels interior to the townhouses would be significantly lower than the maximum levels presented above due to the attenuation provided by building
walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition).
Based on the limited duration and magnitude of the predicted exceedances of
NYSDEC noise impact criteria, it is the Applicant’s opinion that noise from construction of the Proposed Project would not rise to the level of a significant adverse impact at this receptor.
The Arbors Condos (South Side of Ivy Hill Lane)
As shown in Table 16-4, residents of The Arbors community along the south side of Ivy Hill Lane would experience high levels of construction noise and
increases in noise levels that would constitute a perceived doubling of noise levels at times during the most noise-intensive construction activities. Maximum Leq(1) noise levels at this receptor resulting from construction would
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be in approximately the high 60s dBA, resulting in noise level increases of up to approximately 11 dBA. Consequently, the maximum noise levels predicted
to be generated by on-Site construction activities at this receptor would be expected to result in exceedances of the NYSDEC noise level thresholds at times during the construction period. The maximum construction noise levels
would occur during portions of the approximately 3 months during road and utility installation, and parking garage foundation operations and portions of the approximately 6 months during the overlap of interior and exterior finishing construction of the AL facility, framing and roofing operations at the IL center core, and foundations operations at the IL south wings. Construction noise levels in the low to mid-60s dBA, resulting in noise level increases between approximately 6 and 10 dBA, would occur intermittently over the course of another 7 months during the construction period. The noise level estimates are for noise levels exterior to the townhouses. During the remainder of construction, noise levels may be noticeable at times, but construction noise levels would remain below the 65 dBA NYSDEC recommended exterior noise
levels and the 6 dBA noise increment threshold.
Noise levels interior to the townhouses would be significantly lower than the maximum levels presented above due to the attenuation provided by building
walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition). Based on the limited duration and magnitude of the predicted exceedances of NYSDEC noise impact criteria,
it is the Applicant’s opinion that noise from construction of the Proposed Project would not rise to the level of a significant adverse impact at this receptor.
Blind Brook High School
As shown in Table 16-4, receptors in Blind Brook High School across Arbor Drive from the Project Site would experience high levels of construction noise and increases in noise levels that would be considered highly objectionable at times during the most noise-intensive construction activities. Maximum Leq(1) noise levels at this receptor resulting from construction
would be in approximately the low 80s dBA, resulting in noise level increases of up to approximately 21 dBA. Consequently, the maximum noise levels predicted to be generated by on-Site construction activities at this receptor
would be expected to result in exceedances of the NYSDEC noise level thresholds at times during the construction period.
The maximum construction noise levels would occur during portions of the
approximately 3 months of road and utilities installation and parking garage foundations construction, portions of the approximately 8 months during the overlap of foundations, framing, roofing interior and exterior finishing, at the
AL facility, IL center core, IL south wing and townhouses, and portions of the approximately 2 months during the overlap of interior and exterior finishing at the AL facility and IL center core and framing and roofing construction at the
IL south wings and townhouses. Construction noise levels in the low to mid 70s dBA resulting in noise level increases between 9 and 15 dBA, would occur intermittently over portions of another 7 months during the construction period. During the remainder of construction, noise levels would remain below the 65
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dBA NYSDEC recommended exterior noise levels and the 6.0 dBA noise increment threshold. Consequently, while construction noise levels would not
persist at their maximum level throughout all construction activities, construction noise levels are predicted to exceed the NYSDEC noise thresholds for approximately 20 months during construction of the Proposed Project.
As stated above, the noise level estimates are for noise levels exterior to the school. Noise levels interior to the school building would be significantly lower than the maximum levels presented above due to the attenuation provided by building walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition). However, given the magnitude and duration of construction noise levels, it is the Applicant’s opinion that noise from construction of the proposed project would constitute a significant, but temporary, adverse impact at this receptor. As noted in Chapter 17, “Alternatives,” the nature and magnitude of this temporary impact would be similar in all studied alternatives to the Proposed Project, save the No Action alternative.
942 King Street (Residences west of King Street)
As shown in Table 16-4, residences and sensitive uses on the west side of King Street between Hutchinson River Parkway and Arbor Drive—represented
by 942 King Street—would experience high levels of construction noise and increases in noise level that would be considered highly objectionable at times during the most noise-intensive construction activities. Maximum Leq(1) noise
levels at this receptor resulting from construction would be in approximately the mid-80s dBA, resulting in noise level increases of up to approximately 15 dBA. Consequently, the maximum noise levels predicted to be generated by on-Site construction activities at this receptor would be expected to result in exceedances of the NYSDEC noise level thresholds at times during the construction period.
The maximum construction noise levels would occur during portions of the approximately 6 months of site demolition, road and utilities installation, and parking garage foundations construction and for portions of the approximately
5 months during framing and roofing of the AL facility. Construction noise levels in the mid-70s dBA, resulting in noise level increases of approximately 7 dBA, would occur intermittently over the course of another 4 months during
the construction period. During the remainder of construction, construction noise levels would remain below the NYSDEC 6 dBA noise increment threshold. Consequently, while construction noise levels would not persist at
their maximum level throughout all construction activities, construction noise levels are predicted to exceed the NYSDEC noise thresholds for approximately 15 months during construction of the Proposed Project.
The noise level estimates are for noise levels exterior to the existing house. Noise levels interior to the house would be significantly lower than the maximum levels presented above due to the attenuation provided by building
walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition). Because noise levels in excess of 65 dBA would occur for no longer than approximately 15 months and noise level increases greater than 10 dBA would occur for no longer than
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approximately 11 months, it is the Applicant’s opinion that noise from construction of the Proposed Project would not rise to the level of a significant
adverse impact at this receptor. As noted in Chapter 17, “Alternatives,” the nature and magnitude of this temporary impact would be similar in all studied alternatives to the Proposed Project, save the No Action alternative.
The Ridge Street Country School
As shown in Table 16-4, the Ridge Street Country School would experience moderate levels of construction noise and modest increases in noise levels at times during the most noise-intensive construction activities. Maximum Leq(1) noise levels at this receptor resulting from construction would be in approximately the high 60s dBA, resulting in noise level increases of up to approximately 8 dBA. Consequently, the maximum noise levels predicted to be generated by on-Site construction activities at this receptor would be
expected to result in exceedances of the NYSDEC noise level thresholds at times during the construction period.
The maximum construction noise levels would occur during portions of the
approximately 3 month overlap of trench and utility installation and parking garage foundation construction; portions of the approximately 2 months of overlap of roofing and framing at the AL facility and IL center core; and
portions of the approximately 2 months of overlap of foundations, framing, roofing, interior and exterior finishing operations at the AL facility, IL center core, IL south wings and townhouses. During the remaining 22 months of
construction noise levels would remain below the 65 dBA NYSDEC recommended exterior noise levels and the 6 dBA noise increment threshold. Consequently, while construction noise levels would not persist at their maximum level throughout all construction activities, construction noise levels are predicted to exceed the NYSDEC noise thresholds for portions of approximately 7 months during construction of the Proposed Project.
The noise level estimates are for noise levels exterior to the school building. Noise levels interior to the school would be significantly lower than the
maximum levels presented above due to the attenuation provided by building walls and windows (approximately 25 dBA lower for typical façade construction with a closed-window condition). Based on the limited duration
and magnitude of the predicted exceedances of NYSDEC noise impact criteria, it is the Applicant’s opinion that noise from construction of the Proposed Project would not rise to the level of a significant adverse impact at this receptor.
The Arbors Condos (North Side of Brush Hollow Crescent)
As shown in Table 16-4, residences in The Arbors on the north side of Brush Hollow Crescent would experience minimal levels of construction noise and
negligible increases in noise levels at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse construction noise impact.
Blind Brook Middle School
As shown in Table 16-4, the Blind Brook Middle School would experience minimal levels of construction noise and negligible increases in noise levels
Chapter 16: Construction
DEIS 16-25 9/12/2018
at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse
construction noise impact.
947 King Street (Residences East of King Street)
As shown in Table 16-4, residences east of King Street—represented by 947
King Street—would experience minimal levels of construction noise and negligible increases in noise levels at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse construction noise impact.
446 North Ridge Street (Residences North of Hutchinson River Parkway)
As shown in Table 16-4, residences north of the Hutchinson River Parkway—represented by 446 North Ridge Street—would experience minimal levels of construction noise and negligible increases in noise levels
at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse construction noise impact.
14 Walker Court (Residences East of King Street south of Arbor Drive)
As shown in Table 16-4, residences east of King Street south of Arbor Drive—represented by 14 Walker Co—would experience minimal levels of
construction noise and negligible increases in noise levels at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse construction noise impact.
109 Glenville Street (Residences South of Glenville Street)
As shown in Table 16-4, residences east of King Street south of Glenville Street—represented by 109 Glenville Street—would experience minimal levels of construction noise and negligible increases in noise levels at times during the most noise-intensive construction activities. These receptors would not have the potential to experience a significant adverse construction noise impact.
16.3.4.8. Conclusions
Construction of the Proposed Project would be expected to result in elevated
noise levels at nearby receptors and noise due to construction would at times be noticeable and highly objectionable. However, at receptors other than those directly adjacent to the Project Site, noise from construction would be
intermittent and of limited duration, and estimated construction noise levels would not exceed NYSDEC noise screening thresholds. Consequently, in the Applicant’s opinion noise associated with the construction of the Proposed
Project would not rise to the level of a significant adverse noise impact at receptors not directly adjacent to the project.
At receptors immediately adjacent to the Project Site, construction of the
Proposed Project would result in large noise level increases and high noise levels during the most noise-intensive construction activities at the adjacent work areas. These noise levels would have the potential to occur for approximately 21
months. Therefore, in the Applicant’s opinion, construction noise at these receptors would rise to the level of significant, but temporary, adverse impact.
900 King Street Redevelopment
9/12/2018 16-26 DEIS
These temporary noise impacts would only occur during the daytime hours, Monday through Saturday, as allowed by the Village Noise Code. It is expected
that construction would not regularly occur during evening and overnight hours or on Sundays, leaving the surrounding receptors unaffected by noise associated with construction of the Proposed Project at these times during which residences
are most sensitive to noise. Finally, as noted in Chapter 17, “Alternatives,” the nature and magnitude of this temporary impact would be similar in all studied alternatives to the Proposed Project, save the No Action alternative.
16.3.5. VIBRATION
The potential for vibrations from construction activities to impact structures and residences near the Project Site is discussed below. Vibratory levels at a receiver are a function of the source strength (which is dependent upon the construction equipment and methods utilized), distance between the equipment and the receiver, characteristics of the
transmitting medium, and receiver building construction. Construction equipment operations cause ground vibrations, which spread through the ground and decrease in strength with distance. Vehicular traffic, even in locations close to major roadways,
typically does not result in perceptible vibration levels unless there are discontinuities in the roadway surface. With the exception of the case of fragile and possibly historically significant structures or buildings, construction activities generally do not reach levels
that can cause architectural or structural damage, but can achieve levels that may be perceptible and annoying in buildings very close to a construction site.
Generally, the construction activities with the highest source strength and potential to result in
perceptible or potentially damaging vibrations include excavation and rock disturbance operations such as blasting, pile driving, and rock drilling. Construction of the Proposed Project is not anticipated to include excavation or rock disturbance activities. Aside from
excavation and rock disturbance, demolition would have the most potential to result in perceptible or damaging vibrations at nearby sensitive uses. Vibrations from building erection and finishing activities would be less than demolition activities and would not have the potential to produce damaging or perceptible levels of vibration at surrounding receptors.
16.3.5.1. Construction Vibration at The Arbors Townhouses
Demolition of the existing structure will occur at least approximately 250 feet from the nearest residences within The Arbors community. At this distance, vibrations from building demolition would be expected to be imperceptible and would not have the potential to result in architectural or structural damage to even a structure extremely susceptible to damage from vibration. Therefore, vibrations from construction of the Proposed Project would not have the
potential to result in a significant adverse impact at The Arbors townhouses.
16.3.5.2. Construction Vibration at the Tennessee Gas Pipeline
Demolition of the existing structure will occur at least approximately 1,000 feet
from the Tennessee Gas Pipeline. At this distance, vibration from building demolition would be expected to be well below the threshold of damage to even a structure extremely susceptible to damage from vibration. Therefore,
vibrations from construction of the Proposed Project would not have the potential to result in a significant adverse impact at the Tennessee Gas Pipeline.
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