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HomeMy WebLinkAbout052124-08.1 ATTACHMENT G"Small Town Atmosphere Outstanding Quality of Life' DRAFT MITIGATED NEGATIVE DECLARATION OF ENVIRONMENTAL SIGNIFICANCE LEAD AGENCY: Town of Danville, Planning Division NAME OF PROJECT: Town of Danville Pickleball Court Development PROJECT DESCRIPTION: The Town is proposing to add up to six new pickleball courts at Osage Station Park where two courts currently exist. ENVIRONMENTAL EFFECTS/MITIGATION MEASURES: 1. NOISE: Would the project result in: a) Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? Less Than Significant with Mitigation Incorporated The proposed project includes the construction of up to six new pickleball courts within an existing park within a residential development. The park currently hosts two pickleball courts and three tennis courts. Noise levels would temporarily be increased due to noise associated with the construction of the courts. The noise impact will be less than significant given required standard conditions of approval which define and limit hours of construction. In addition, concerns have been raised regarding potential noise impacts generated by the impact of the pickleball against the face of the pickleball. In order to study this potential impact, a noise study was prepared by Rincon Consultants, Inc. The study's modeling concluded that using the sound meter set to slow and using "A" weighting, the noise levels would be below the threshold of 60 do found in the Town of Danville General Plan Policy 27.09. In order to address concerns that the nature of the noise generated by pickleball is of a different character due to its "impulsive" nature, the study additionlly modeled the noise generated by taking measurements with the 500 LA GONDA WAY, DANVILLE, CALIFORNIA 94526 Administration Building Engineering & Planning Transportation Maintenance Police Parks and Recreation (925) 314-3388 (925) 314-3330 (925) 314-3310 (925) 314-3310 (925) 314-3450 (925) 314-3410 (925) 314-3400 • TT A r1T T1 rT11 TT n April 99, 7(1741 Page 2 sound meter set to "fast", including a 5 dB adjustment for impulsive noise and utilizing residential thresholds found in the Model Community Noise Control Ordinance (State of California 1977). Using those criteria, if unmitigated, project operational noise levels are anticipated to exceed several of the exterior noise thresholds at residences to the south and west. To mitigate potential noise impacts, the Town will affix sound blankets of a minimum 12 -foot height to the chain-link fences enclosing the courts along the project southern, western, and eastern court boundaries. The sound blankets shall be at least 1/8 -inch thick, continuous from grade to top of the blankets with no gaps, and have a minimum sound transmission class (STC) rating of 28. Prior to project operation, post signs at the pickleball court entrances with a list of allowable USA Pickleball "Quiet Category" -compliant paddles. Non -quiet paddles shall be prohibited. Following project implementation, the Town shall retain a qualified acoustical consultant to measure project operational noise levels to verify that noise levels at the closest residential property lines do not exceed the Town's thresholds. With implementation of the recommended mitigation measure, project operational noise would be conservatively reduced by at least 10 dBA. With sound blanket mitigation, project operational noise would not exceed significance thresholds, and impacts would be less than significant. MITIGATION MEASURE 1: Prior to project operation, aff x sound blankets of a minimum 12 foot height to the chain-link fences enclosing the courts along the project southern, western, and eastern court boundaries. The sound blankets shall be at least 1/8 -inch thick, continuous from grade to top of the blankets with no gaps, and have a minimum sound transmission class (STC) rating of 28. MITIGATION MEASURE 2: Prior to project operation, post signs at the pickleball court entrances with a list of allowable USA Pickleball "Quiet Category" -compliant paddles. Non - quiet paddles shall be prohibited. MITIGATION MEASURE 3: Following project implementation, the Town shall retain a qualified acoustical consultant to measure project operational noise levels to verify that noise levels at the closest residential property lines do not exceed the Town's thresholds. DETERMINATION: Based upon the above identified mitigation measures, no significant environmental impacts are anticipated to be April 29, 2024 Page 3 associated with the subject project. A Draft Mitigated Negative Declaration of Environmental Significance has been prepared. The Initial Study was prepared by the Planning Department, Town of Danville. Copies of the Initial Study may be obtained at the Town offices located at 500 La Gonda Way, Danville, California 94526. ATTEST: Riley Anderson -Barrett Associate Planner April 15, 2024 Project No. 23-14340 Henry Perezalonso, CPRE Recreation, Arts & Community Services Director Town of Danville (925) 314-3454 Via email: hperezalonso@danville.ca.gov Rincon Consultants, Inc. 449 15th Street, Suite 303 Oakland, California 94612 510 834 4455 info@rinconconsultants.com www.rinconconsultants.com Subject: Noise Study for the Osage Park Pickleball Project, Danville, California Dear Mr. Perezalonso: This technical letter report summarizes the results for the Osage Park pickleball noise study for the proposed project located at Osage Park in the Town of Danville. The noise study addresses potential noise impacts from implementation of the proposed project on nearby residences. This report was prepared by Josh Carman, INCE-USA. Mr. Carman is a Noise Director with Rincon Consultants, Inc. and has over 20 years of experience in the field of acoustics and environmental noise and has participated in the environmental review and monitoring process for a wide variety of projects in California, Washington, Nevada, and New York. Mr. Carman prepares noise and vibration assessments for environmental impact studies and technical studies in compliance with the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA) using federal, state, and local guidelines and methodology. Mr. Carman is a member of the Institute of Noise Control Engineering. Project Understanding The project would involve expansion of the existing pickleball courts, from two to up to eight courts, along with bench seating near the courts. A total of three tennis courts would remain. Figure 1 shows the proposed project layout. Park operational hours of dawn to dusk seven days a week would remain. For the purposes of this analysis and based on information from the Town, the pickleball courts operate between the hours of 7:30 a.m. to 9:00 p.m. on weekdays and from 8:00 a.m. to 9:00 p.m. on weekends depending on the season. The closest residences are immediately south of the project site on El Capitan Drive and additional residences are located to the west on Orange Blossom Way. Environmental Scientists Planners E n gine e r s Figure 1 Proposed Project Layout Noise Overview Town of Danville Osage Park Pickleball Noise Study Sound is a vibratory disturbance created by a moving or vibrating source, which is capable of being detected by the hearing organs. Noise is defined as sound that is loud, unpleasant, unexpected, or undesired and may therefore be classified as a more specific group of sounds. The effects of noise on people can include general annoyance, interference with speech communication, sleep disturbance, and, in the extreme, hearing impairment. Noise levels are commonly measured in decibels (dB) using the A -weighted sound pressure level (dBA). The A -weighting scale is an adjustment to the actual sound pressure levels so that they are consistent with the human hearing response. Decibels are measured on a logarithmic scale that quantifies sound intensity in a manner similar to the Richter scale used to measure earthquake magnitudes. A doubling of the energy of a noise source, such as doubling of traffic volume, would increase the noise level by 3 dBA; dividing the energy in half would result in a 3 dBA decrease. Human perception of noise has no simple correlation with sound energy: the perception of sound is not linear in terms of dBA or in terms of sound energy. Two sources do not "sound twice as loud" as one source. It is widely accepted that the average healthy ear can barely perceive changes of 3 dBA, increase or decrease (i.e., twice the sound energy); that a change of 5 dBA is readily perceptible; and that an increase (or decrease) of 10 dBA sounds twice (or half) as loud. Sound changes in both level and frequency spectrum as it travels from the source to the receiver. The most obvious change is the decrease in level as the distance from the source increases. The manner by which noise reduces with distance depends on factors such as the type of sources (e.g., point or line, the path the sound will travel, site conditions, and obstructions). Noise levels from a point source typically attenuate, or drop off, at a rate of 6 dBA per doubling of distance (e.g., construction, industrial machinery, ventilation units). Noise levels may also be reduced by intervening structures; the amount of attenuation provided by this "shielding" depends on the size of the object and the frequencies of the noise levels. Natural terrain features such as hills and dense woods, and man-made features such as Page 2 Town of Danville Osage Park Pickleball Noise Study buildings and walls, can significantly alter noise levels. Generally, any Targe structure blocking the line -of sight -will provide at least 5 dBA reduction in noise level at the receiver. The impact of noise is not a function of loudness alone. The time of day when noise occurs and the duration of the noise are also important factors of project noise impact. Most noise that lasts for more than a few seconds is variable in its intensity. Consequently, a variety of noise descriptors have been developed. One of the most frequently used noise metrics is the equivalent noise level (Leq); it considers both duration and sound power level. Leq is defined as the single steady A -weighted level equivalent to the same amount of energy as that contained in the actual fluctuating levels over time. Typically, Leq Is summed over a one-hour period. L. is the highest root mean square (RMS) sound pressure level within the sampling period, and Lmin is the lowest RMS sound pressure level within the measuring period. Noise that occurs at night tends to be more disturbing than that occurring during the day as it can disrupt sleep. The sound level that is exceeded "n" percent of time during a given sample period is denoted as Ln. For example, the L50 level is the statistical indicator of the time -varying noise signal that is exceeded 50 percent of the time (during each sampling period); that is, half of the sampling time, the changing noise levels are above this value and half of the time they are below it. This is called the "median sound level." The L10 level, likewise, is the value that is exceeded 10 percent of the time (i.e., near the maximum) and this is often known as the "intrusive sound level." The L90 is the sound level exceeded 90 percent of the time and is often considered the "effective background level" or "residual noise level." Regulatory Framework State of California In 1977, the State of California Office of Noise Control published the Model Community Noise Control Ordinance (State of California 1977). This model ordinance was developed as a guide to assist local agencies such as cities and towns in the development of noise ordinances to control noise in their communities. While the State of California Office of Noise Control is no longer operational and has no authority over local noise control in the Town of Danville, the recommended noise limits in this guide are indicative of acceptable levels of community noise exposure. Table 1 shows the recommended exterior noise standards by receiving land use. Table 1 Exterior Noise Limits Receiving Land Use Category Time Period Noise Level (dBA)1• z Noise Zone Classification Rural Suburban Suburban Urban One & Two Family Residential 10:00 p.m. — 7:00 a.m. 40 7:00 a.m. — 10:00 p.m. 50 45 55 Multiple Dwelling 10:00 p.m. — 7:00 a.m. 45 50 Residential 7:00 a.m. —10:00 p.m. 50 55 Public Space Limited Commercial 10:00 p.m. — 7:00 a.m. 55 50 60 55 60 Page 3 Some Multiple Dwellings 7:00 a.m. — 10:00 p.m. 60 Commercial 10:00 p.m. — 7:00 a.m. 7:00 a.m. — 10:00 p.m. 60 65 Town of Danville Osage Park Pickleball Noise Study Light Industrial Any Time 70 Heavy Industrial Any Time 75 Source: State of California Office of Noise Control, 1977. Notes: 1 The noise standard for that land use for a cumulative period of more than thirty minutes in any hour [L50]; or The noise standard plus 5 dB for a cumulative period of more than fifteen minutes in any hour [L25]; or The noise standard plus 10 dB for a cumulative period of more than five minutes in any hour [L8]; or The noise standard plus 15 dB for a cumulative period of more than one minute in any hour [L2]; or The noise standard plus 20 dB or the maximum measures ambient level, for any period of time. 2 In the event the alleged offensive noise contains a steady, audible tone, such as a whine, screech, or hum, or is a repetitive noise such as hammering or riveting, or contains music or speech conveying informational content, the standard limits shall be reduced by 5 dB. Town of Danville General Plan The Town of Danville General Nan contains land use compatibility categories for community noise exposure, noise contour maps, and policies related to noise. The following goal and policy are relevant to the proposed project: Goal 27 Protect existing and future residents of Danville from hazards and nuisance associated with excessive levels of noise by maintaining or reducing noise intrusion levels in all areas of the Town to acceptable levels. Policy 27.09 Generally maintain exterior noise levels below 60 Ldn in areas where outdoor use is a major consideration, such as in residential backyards. Where the Town determines that this level cannot be achieved after reasonable mitigation has been applied, higher standards may be permitted at the discretion of the Town Council. In such cases, indoor noise levels should not exceed an Ldn of 45 dB. Town of Danville Municipal Code The Town of Danville Municipal Code does not have any exterior noise standards. However, it is unlawful for a person to willfully make a loud, unnecessary or unusual noise which disturbs the peace or quiet of a neighborhood or which causes discomfort or annoyance to a reasonable person of normal sensitiveness residing in the area. Thresholds of Significance To determine whether a project would have a significant noise impact, Appendix G of the California Environmental Quality Act (CEQA) Guidelines requires consideration of whether a project would result in generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies. For the purposes of this analysis, the project would be considered to have a Page 4 Town of Danville Osage Park Pickleball Noise Study significant impact if operational noise levels exceed 60 dBA Ldn or the exterior noise level standards shown in Table 2 at nearby residences. The noise levels standards shown in Table 2 are based on the suburban daytime noise standards for single-family residences shown in Table 1 with an adjustment of 5 dBA down to account for the impulsive nature of pickleball noise. Table 2 Exterior Noise Thresholds Receiving Land Use Category L50 L25 L8 L2 Lmax Single -Family Suburban 50 55 60 65 70 Notes: Includes 5 dBA adjustment down to account for impulsive sources. Ambient Noise Measurements To characterize ambient noise levels surrounding the proposed project, five short-term noise level measurements were conducted on Saturday, July 8, 2023 and repeated on Tuesday, July 11, 2023. One additional short-term noise measurement was conducted on Wednesday, December 13, 2023, to document existing pickleball noise with a "fast" sound level meter setting. Short-term noise measurement (ST) -1 was conducted at the north end of the parking lot to capture noise generated from surrounding park activity. ST -2 was conducted near the parking lot to capture noise levels at the backyard of 882 Orange Blossom Way. ST -3 was conducted approximately 50 feet east of the existing pickleball courts while two games were underway on both monitoring days. ST -4 was conducted at the southern boundary of Osage Park to capture noise levels at the backyard of 535 El Capitan Drive. ST -5 was conducted near the west end of the basketball courts at Charlotte Wood Middle School. ST -6 (December 13, 2023, only) was conducted approximately 50 feet north of the northern most pickleball court while four players were playing a game with spectators. The sound level meter was equipped with a windscreen during measurements. The sound level meter used for noise monitoring (Larson Davis SoundTrack LxT) satisfies the American National Standards Institute (ANSI) standard for Type 1 instrumentation. The sound level meter was set to "slow" response and "A" weighting (dBA) for measurements at ST -1 through ST -5. As discussed above, the sound level meter was set to "fast" response at ST -6. Sound level meters set to "slow" have a time constant of 1 second. This setting is commonly used to measure environmental noise sources. However, due to the fast rise and decay of the noise produced by the paddle hitting the pickleball, ST -6 was conducted using a "fast" meter response with a time constant of 125 milliseconds for a more conservative assessment of project noise impacts. The meter was field calibrated before and after the monitoring period. All measurements were at least five feet above the ground and away from reflective surfaces. Table 3 summarizes the results of the noise measurements on a typical weekend day and Table 4 summarizes the noise measurements taken during the week. Table 5 summarizes the noise measurement taken at ST -6 on Wednesday, December 13, 2023. Figure 2 shows the approximate location of the short-term noise measurements taken in the project vicinity. Page 5 Town of Danville Osage Park Pickleball Noise Study Table 3 Project Site Vicinity Noise Monitoring Results - Saturday, July 8, 2023 Measurement Location LF„ Lmin 1 -mak Sample Times (dBA) (dBA) (dBA) ST -1 ST -2 Just north of the parking lot for Pickleball courts near single-family residence. 8:51 — 9:06 a.m. 53.4 50.0 61.0 Middle of the parking lot 9:10 — 9:25 a.m. 53.3 49.7 60.4 for Pickleball courts near single-family residence. ST -3a Approximately 50 feet east of the middle of the Pickleball courts. 8:30 — 8:45 a.m. 58.0 55.4 61.9 ST -3b Approximately 50 feet east of the middle of the Pickleball courts. 10:03 — 10:18 a.m. 58.2 53.9 67.7 ST -4 Osage Park southern boundary near single- family residence, south of Pickleball courts. 9:27 — 9:42 a.m. 54.2 50.7 62.4 ST -5 Just west of the basketball courts at the Charlotte Wood Middle School. 9:46 — 10:01 a.m. 57.7 54.1 69.9 Leq = average noise level equivalent; dBA = A -weighted decibel; L„, = minimum instantaneous noise level; Lmax= maximum instantaneous noise level Table 4 Project Site Vicinity Noise Monitoring Results - Tuesday, July 11, 2023 Measurement Location L,„,, Lnian Sample Times Le„ (dBA) (dBA) (dBA) ST -1 ST -2 Just north of the parking lot for Pickleball courts near single-family residence. Middle of the parking lot for Pickleball courts near single-family residence. 8:05 — 8:20 a.m. 8:24 — 8:39 a.m. 50.2 45.0 50.3 64.9 46.7 64.6 ST -3 Approximately 50 feet east of the middle of the Pickleball courts. 9:13 — 9:28 a.m. 53.2 44.3 66.0 ST -4 Osage Park southern 8:53 — 9:08 a.m. 45.7 41.2 55.0 boundary near single - Page 6 family residence, south of Pickleball courts. Town of Danville Osage Park Pickleball Noise Study ST -5 Just west of the basketball courts at the Charlotte Wood Middle School. 9:30 — 9:45 a.m. 47.1 42.1 58.7 Leg = average noise level equivalent; dBA = A -weighted decibel; Lm;n = minimum instantaneous noise level; Lmax = maximum instantaneous noise level Table 5 Project Site Vicinity Noise Monitoring Results - Wednesday, December 13, 2023 Leq L.. L50 L25 1.8 L2 Lmax Measurement Location Sample Times (dBA) (dBA) (dBA) (dBA) (dBA) (dBA) (dBA) ST -6 Approximately 50 feet north of northern most pickleball court. 3:16 — 3:21 p.m. 60.5 52.0 55.0 56.7 62.3 69.3 82.5 Leq = average noise level equivalent; dBA = A -weighted decibel; Lmin = minimum instantaneous noise level; Lmax = maximum instantaneous noise level Page 7 Figure 2 Aooroximate Noise Monitoring Locations Town of Danville Osage Park Pickleball Noise Study Short Term Noise Measurements {ST) 0 75 150 N I t Feet Imagery provided by Microsoft Bing and Its licensors R) 2024. Page 8 Noise Modeling Results Town of Danville Osage Park Pickleball Noise Study A property of sound is that it attenuates, or drops off, as the distance from the noise source increases. For a point source, such as pickleball courts, sound levels decrease approximately 6 dBA for each doubling of distance from the source (Caltrans 2013). The project would generate noise at the nearby sensitive receptors and the attenuation rate is applied to estimate noise levels at the sensitive receptors. Shielding effects from buildings, terrain, or other barriers are conservatively not factored into the attenuation calculations for the purposes of this analysis. For the purposes of this analysis and based on information from the Town, the pickleball courts operate between the hours of 7:30 a.m. to 9:00 p.m. on weekdays and from 8:00 a.m. to 9:00 p.m. on weekends. Recreational noise would continue to consist of noise from tennis and/or pickleball being played as under existing conditions, including noise from the ball hitting a racquet or paddle, noise from the ball bouncing off the court, noise from the ball hitting the chain link fence, and noise from players and spectators talking. To estimate project noise levels, the noise measurement results for ST -6, taken during a single game of pickleball with a "fast" meter response, were adjusted based on distance from the center of each proposed court to the nearby residences. A reasonable worst-case scenario was modeled assuming that all pickleball courts and tennis courts are used simultaneously. The estimated Lmax noise levels are based on the edge of the closest court to the nearest residential property line. In addition to the statistical Ln and Lmax criteria shown in Table 2, the estimated hourly Leg value at the residential property line is then converted to an Ldn value assuming a worst-case scenario of all courts in operation between the hours of 7:30 a.m. to 9:00 p.m. to assess against the Town's Ldn threshold. Attachment A includes the noise calculations. The results of modeling indicate that project operational recreational noise levels for all eight pickleball courts and all three tennis courts operating simultaneously would result in a noise level of up to 56 Ldn at the closest residential property line to the south and up to 56 Ldn at the closest residential property line to the west. This would be below the threshold of 60 Lan per Town of Danville General Plan Policy 27.09. Estimated project noise levels in comparison to the statistical Ln and Lmax thresholds are shown in Table 6. Table 6 Osage Park Pickleball Project Noise Levels Noise Metric Daytime Noise Standard' Project Noise Levels at Project Noise Levels at Residences to West2 Residences to South3 Lmax L2 L8 L25 L50 70 65 60 55 50 72 67 60 55 53 76 67 60 55 53 Notes: Bold value = exceedance of noise standard. ' Includes a 5 dB penalty for impulsive noise. 2 Distance of 160 feet from edge of the closest court for Lmax. Distance of 110 feet from edge of the closest court for Lmax. Page 9 Town of Danville Osage Park Pickleball Noise Study As shown in Table 6, project operational noise levels are anticipated to exceed several of the exterior noise thresholds at residences to the south and west, if unmitigated. Mitigation measures are recommended to reduce project operational noise levels. Noise Mitigation The Town shall implement the following noise reduction measures: • Prior to project operation, affix sound blankets of a minimum 12 -foot height to the chain-link fences enclosing the courts along the project southern, western, and eastern court boundaries. The sound blankets shall be at least 1/8 -inch thick, continuous from grade to top of the blankets with no gaps, and have a minimum sound transmission class (STC) rating of 28. • Prior to project operation, post signs at the pickleball court entrances with a list of allowable USA Pickleball "Quiet Category" -compliant paddles. Non -quiet paddles shall be prohibited. ■ Following project implementation, the Town shall retain a qualified acoustical consultant to measure project operational noise levels to verify that noise levels at the closest residential property lines do not exceed the Town's thresholds. With implementation of the recommended mitigation measure, project operational noise would be conservatively reduced by at least 10 dBA. Attachment B contains product specifications for AcoustiFence, an example sound barrier product meeting the specifications of the mitigation measure. Table 7 shows the estimated mitigated project noise levels. As shown in Table 7, with sound blanket mitigation, project operational noise would not exceed significance thresholds, and impacts would be less than significant. Table 7 Osage Park Pickleball Project Mitigated Noise Levels Noise Metric Daytime Noise Standard' Project Noise Levels at Project Noise Levels at Residences to West? Residences to South3 Lmax L2 L8 L25 70 65 60 55 L50 50 62 57 50 45 43 66 57 50 45 43 Notes: Bold value = exceedance of noise standard. 1 Includes a 5 dB penalty for impulsive noise. 2 Distance of 160 feet from edge of the closest court for Lmax. Distance of 110 feet from edge of the closest court for Lmax. Reduced Court Alternative In addition to the proposed eight pickleball court project, a reduced six pickleball court alternative was evaluated. Figure 3 shows the six court alternative. Page 10 Figure 3 Six Court Project Alternative Layout PROPOSED CONCEPT eem.ni Diauntl:nc i:.c l...:.., ncwmn Knm.nn man hmi. NFlman *mkt, II • sMliro ea. Town of Danville Osage Park Pickleball Noise Study Noise modeling was conducted for the six court alternative using the same methods as for the proposed project. The results of modeling indicate that the six court alternative would reduce project noise levels by approximately 1 dBA at residences to the south and west and that the recommend mitigation would still be required. This concludes our operational noise impact assessment of the proposed project. Do not hesitate to contact me if you have questions about this environmental noise impact assessment or its findings. Sincerely, RINCON CONSULTANTS, INC. Josh Carman, INCE-USA Director Page 11 References California Department of Transportation (Caltrans), 2013. Technical Noise Supplement ("TeNS") to the Traffic Noise Analysis Protocol. California Office of Noise Control, 1977. Model Community Noise Control Ordinance. Crocker, Malcolm J. (Editor), 2007. Handbook of Noise and Vibration Control Book, ISBN: 978-0-471- 39599-7, Wiley-VCH, October. Danville, Town of, 2013. The Town of Danville 2030 General Plan. Danville, Town of. Danville, California Municipal Code. Available online: https://codelibrary.amlegal.com/codes/danvilleca/latest/danville ca/0-0-0-1. Accessed April 15, 2024. Lawrence E. Kinsler and R. Frey, Austin and B. Coppens, Alan and V. Sanders, James, 1999. Fundamentals of Acoustics, 4th Edition. ISBN 0-471-84789-5. Wiley-VCH, December. Attachment A Noise Modeling Calculations L50 Residences South L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 55 50 39.3 305 Pickleball Court 2 55 50 39.4 300 Pickleball Court 3 55 50 39.4 300 Pickleball Court 4 55 50 39.6 295 Pickleball Court 5 55 50 41.2 245 Pickleball Court 6 55 50 41.2 245 Pickleball Court 7 55 50 41.6 235 Pickleball Court 8 55 50 41.6 235 Tennis Court 1 55 50 44.9 160 Tennis Court 2 55 50 45.2 155 Tennis Court 3 55 50 45.5 150 Combined Noise Level 52.8 Residences West L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 55 50 43.6 185 Pickleball Court 2 55 50 42.3 215 Pickleball Court 3 55 50 41.2 245 Pickleball Court 4 55 50 40.2 275 Pickleball Court 5 55 50 44.1 175 Pickleball Court 6 55 50 42.7 205 Pickleball Court 7 55 50 41.6 235 Pickleball Court 8 55 50 40.5 265 Tennis Court 1 55 50 44.1 175 Tennis Court 2 55 50 42.1 220 Tennis Court 3 55 50 40.5 265 Combined Noise Level 52.7 L25 Residences South L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 56.7 50 41.0 305 Pickleball Court 2 56.7 50 41.1 300 Pickleball Court 3 56.7 50 41.1 300 Pickleball Court 4 56.7 50 41.3 295 Pickleball Court 5 56.7 50 42.9 245 Pickleball Court 6 56.7 50 42.9 245 Pickleball Court 7 56.7 50 43.3 235 Pickleball Court 8 56.7 50 43.3 235 Tennis Court 1 56.7 50 46.6 160 Tennis Court 2 56.7 50 46.9 155 Tennis Court 3 56.7 50 47.2 150 Combined Noise Level 54.5 Residences West L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 56.7 50 45.3 185 Pickleball Court 2 56.7 50 44.0 215 Pickleball Court 3 56.7 50 42.9 245 Pickleball Court 4 56.7 50 41.9 275 Pickleball Court 5 56.7 50 45.8 175 Pickleball Court 6 56.7 50 44.4 205 Pickleball Court 7 56.7 50 43.3 235 Pickleball Court 8 56.7 50 42.2 265 Tennis Court 1 56.7 50 45.8 175 Tennis Court 2 56.7 50 43.8 220 Tennis Court 3 56.7 50 42.2 265 Combined Noise Level 54.4 L8 Residences South L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 62.3 50 46.6 305 Pickleball Court 2 62.3 50 46.7 300 Pickleball Court 3 62.3 50 46.7 300 Pickleball Court 4 62.3 50 46.9 295 Pickleball Court 5 62.3 50 48.5 245 Pickleball Court 6 62.3 50 48.5 245 Pickleball Court 7 62.3 50 48.9 235 Pickleball Court 8 62.3 50 48.9 235 Tennis Court 1 62.3 50 52.2 160 Tennis Court 2 62.3 50 52.5 155 Tennis Court 3 62.3 50 52.8 150 Combined Noise Level 60.1 Residences West L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 62.3 50 50.9 185 Pickleball Court 2 62.3 50 49.6 215 Pickleball Court 3 62.3 50 48.5 245 Pickleball Court 4 62.3 50 47.5 275 Pickleball Court 5 62.3 50 51.4 175 Pickleball Court 6 62.3 50 50.0 205 Pickleball Court 7 62.3 50 48.9 235 Pickleball Court 8 62.3 50 47.8 265 Tennis Court 1 62.3 50 51.4 175 Tennis Court 2 62.3 50 49.4 220 Tennis Court 3 62.3 50 47.8 265 Combined Noise Level 60.0 L2 Residences South L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 69.3 50 53.6 305 Pickleball Court 2 69.3 50 53.7 300 Pickleball Court 3 69.3 50 53.7 300 Pickleball Court 4 69.3 50 53.9 295 Pickleball Court 5 69.3 50 55.5 245 Pickleball Court 6 69.3 50 55.5 245 Pickleball Court 7 69.3 50 55.9 235 Pickleball Court 8 69.3 50 55.9 235 Tennis Court 1 69.3 50 59.2 160 Tennis Court 2 69.3 50 59.5 155 Tennis Court 3 69.3 50 59.8 150 Combined Noise Level 67.1 Residences West L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 69.3 50 57.9 185 Pickleball Court 2 69.3 50 56.6 215 Pickleball Court 3 69.3 50 55.5 245 Pickleball Court 4 69.3 50 54.5 275 Pickleball Court 5 69.3 50 58.4 175 Pickleball Court 6 69.3 50 57.0 205 Pickleball Court 7 69.3 50 55.9 235 Pickleball Court 8 69.3 50 54.8 265 Tennis Court 1 69.3 50 58.4 175 Tennis Court 2 69.3 50 56.4 220 Tennis Court 3 69.3 50 54.8 265 Combined Noise Level 67.0 Lmax Residences South L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 50 Pickleball Court 2 50 Pickleball Court 3 50 Pickleball Court 4 50 Pickleball Court 5 50 Pickleball Court 6 50 Pickleball Court 7 50 Pickleball Court 8 50 Tennis Court 1 50 Tennis Court 2 50 Tennis Court 3 82.5 50 75.7 110 Combined Noise Level Residences West L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) Pickleball Court 1 50 Pickleball Court 2 50 Pickleball Court 3 50 Pickleball Court 4 50 Pickleball Court 5 50 Pickleball Court 6 50 Pickleball Court 7 50 Pickleball Court 8 50 Tennis Court 1 82.5 50 72.4 160 Tennis Court 2 50 Tennis Court 3 50 Combined Noise Level Leq Residences South Pickleball Court 1 Pickleball Court 2 Pickleball Court 3 Pickleball Court 4 Pickleball Court 5 Pickleball Court 6 Pickleball Court 7 Pickleball Court 8 Tennis Court 1 Tennis Court 2 Tennis Court 3 Combined Noise Level Residences West Pickleball Court 1 Pickleball Court 2 Pickleball Court 3 Pickleball Court 4 Pickleball Court 5 Pickleball Court 6 Pickleball Court 7 Pickleball Court 8 Tennis Court 1 Tennis Court 2 Tennis Court 3 Combined Noise Level L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) 60.5 50 44.8 305 60.5 50 44.9 300 60.5 50 44.9 300 60.5 50 45.1 295 60.5 50 46.7 245 60.5 50 46.7 245 60.5 50 47.1 235 60.5 50 47.1 235 60.5 50 50.4 160 60.5 50 50.7 155 60.5 50 51.0 150 58.3 L1 (dBA) Distance (ft) L2 (dBA) Distance to Sensitive Receptor (ft) 60.5 50 49.1 185 60.5 50 47.8 215 60.5 50 46.7 245 60.5 50 45.7 275 60.5 50 49.6 175 60.5 50 48.2 205 60.5 50 47.1 235 60.5 50 46.0 265 60.5 50 49.6 175 60.5 50 47.6 220 60.5 50 46.0 265 58.2 L() Energy+penalty 676082.9754 676082.9754 676082.9754 676082.9754 L L LO r— • cs) N- t- W co co O O O co CO CO ti ti ti (0 co co 676082.9754 676082.9754 2137962.09 2137962.09 CO 000000000<tNI' d' CO r r r r r r r r r CO LO LO N- I -- h- h- 0) 07 07 N CV CV CV N CO O O 00 CO CO CO CO M N- ti CO CO 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V d' r r r r r M M M M M co M M co M M > 0 0 0 0 0 0 0 0 0 0 0 0) CO (fl (fl CO CO CO CO CO CO CO CO 0000000000c, m co co co CD CO CO CO CO CO CO CO WCO CO CO CO CO CO CO 0 CO (0 CO N N N N N N N N N N N 00 co 0 (O c0 00 00 00 a0 00 a0 101010 LO L0 L0 L0 LO L0 CO LO a' 0, J r r 0 0 0 0 0 0 0 0 0 0 M M M 0) O O 000 000 000 000 N N N Cp O W Ln MM o O o o o 0 0 0 0000 0 0 0 0 000 o O o o O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 c 0000 0 0 00 00 000 0 000 0000 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00_09 0 0 p0 0000999 0 0 0 0 0 0 0 0 0 L r r r == r r r r r r r r r r r r r r r r r r •r 000000000000000000 0 00000 000000000000000000000000 d 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 al O O O O O O O O O O O O O O O O O O O O O O O d EN- N M4 CO of O r N M O r N M 4 L() O C` CO r r r r r r r r N N N N 0 0 0 0 0 0 0 0 0 0 r L (V m to e0 a, c 00 Attachment B Noise Barrier Product Specifications RcoUst/IbIo k® / 1quieting the world Product Data Sheet Product Name AcoustiFence® Noise Reducing Fences For Manufacturer Info: Contact: Acoustiblok, Inc. 6900 Interbay Boulevard Tampa, FL 33616 Call - (813) 980-1400 Fax - (813)849-6347 Email - sales@acoustiblok.com www.acoustiblok.com Product Description Basic Use AcoustiFence was originally developed by Acoustiblok, Inc. for noise isolation on offshore oil rigs, but has since proven successful in many other demanding outdoor settings, such as construction sites, commercial/industrial facilities, and residential communities. AcoustiFence Noise Reducing Fences AcoustiFence is a unique, heavy -mineral filled, barium free, viscoelastic acoustical material that is made in the U.S.A. Unlike fences or shrubs, this material does extraordinarily well in blocking direct sound, and a unique characteristic of the material sets it apart from other sound barriers when dealing with very low frequencies. oe 0, Or 05 04 03 0t a Q 4rlBslC$ickT.gxecga:�se (Mdependem cartitied lib) Sound Absorption (NRC) Frequency (Hz) Sound Absorption Test Results Benefits: • Effectively reduces exterior noise • Over 300 UL Classifications • Easy to install • Resistant to UV, dirt and water • Resistant to corrosion, mold and mildew Acoustiblok, Inc. 6900 Interbay Blvd. Tampa, FL 33616 (813) 980-1400 i9coq4jok® uithe world Product Data Sheet Product Name AcoustiFence® Noise Reducing Fences AcoustiFence Noise Reducing Fences continued... In frequencies of 5OHz and below, the heavy limp AcoustiFence material actually begins to vibrate from low frequency sound waves. In essence it is transforming these low frequency sound waves into mechanical movement and internal friction energy. Laboratory tests indicate that this transformation process inhibits these lower frequencies from penetrating AcoustiFence, reducing their level by over 60 percent relative to the human ear. In addition, AcoustiFence becomes an absorbent material in these frequencies with test results show an NRC (noise reduction coefficient) as high as 0.78 (with 1.00 being the max). As such it is clear that AcoustiFence not only reduces sound as a barrier, but also acts as an acoustical absorbent material in very low frequencies, as opposed to reflecting those frequencies back like most other barriers. It is worth noting that lead sheets (which are toxic) work in the same manner. Green AcoustiFence One of Acoustiblok's most popular products, designed as an advanced sound barrier that easily attaches to most types of fencing, is now available in a new green shade that easily blends into the environment. This makes it ideal for landscaping projects, residential home use and any outdoor applications where blending into the natural foliage is a concern. Green AcoustiFence has the same sound deadening properties and features as our original black AcoustiFence. In addition, this new version features advanced reinforced edging and stainless steel cable ties. Made and sourced in the USA, It comes in 6x30 foot sections and is one of the most effective first steps in reducing noise for industrial, commercial and residential projects. Acoustiblok, Inc. 16900 Interbay Blvd. Tampa, FL 33616 I (813) 9804400 RcoUst/IbIok® / / / 1quieting the world Product Data Sheet Product Name AcoustiFence® Noise Reducing Fences Sound Transmission Class (STC) Sound Transmission Class (STC) is a single number that represents the sound blocking capacity of a partition such as a wall or ceiling. STC numbers are often called out in architectural specifications, to assure that partitions will reduce noise levels adequately. For performance similar to laboratory test numbers, it is necessary to adhere closely to the construction materials and techniques used in the tested partition. STC is calculated by comparing the actual sound loss measured when 18 test frequencies pass through a partition, with fixed values for each STC level. The highest STC curve that the measured sound loss numbers fit under, determines the STC rating of the partition. STC calculations emphasize sound frequencies that match the human voice. A high STC partition will block the sound of human speech and block noise that interferes with human speech. To estimate high and low frequency performance, consult the Sound Transmission Loss graph included in STC test reports. Impact Insulation Class (IIC) measure transmitted impact noise and are specified for floor -ceiling assemblies only. Acoustical test reports for numerous wall and floor/ceiling designs are available from Acoustiblok on request. All our test data is taken directly from independent 3rd party laboratories under NVLAP certification. Sound Tranemission loss 40 30 20 10 0 (Independent certified lab) Sound Transmission Loss SFC Rating = 78 OITC Rating = 22 47r --So Ind Transmission Loss —•—STC Colltuin 1C Frequency (1-10 1111. 1111 Sound Transmission Loss Test Results Acoustiblok, Inc. I 6900 Interbay Blvd. Tampa, FL 33616 I (813) 980-1400 \\‘, i9cousti blot® Product Data Sheet Product Name AcoustiFence® Noise Reducing Fences Physical Properties • Barium free • Minimum STC 28 per ASTM E90-02 & ASTM E413-87 • Minimum sound attenuation 24 dBA @ 100Hz & 16dBA @ 40Hz • Size - 6 ft.(1.83m) x 30 ft.(9.14m) x 0.125 in. (.3mm) —180 ft2 (16.83m2) • Color - black or green • High UV resistance • Heat tolerance: 200°F (93°C) for 7 days, Tess than 1% shrinkage with no deformation. • Freezes at -40°F (-40°C). Do not unroll or flex frozen material. Properties not affected by freeze/thaw cycles. • No fungal or algal growth and no visible disfigurement, per ASTM D3273 and ASTM D3274 (rating=10) • Tensile Strength - min. 365 PSI • Weight per section: 185 lbs. (84Kg) Material Specifications — Part # "Acoustifence 6x30 Industrial" Acoustical Rating STC 28 / OITC 22 Size 6 ft. (1.83m) x 30 ft. (9. 14m) x 0.125 in .(3mm) 180 ft2 (16.72m2) Weight 185 lbs. (84Kg) Fastening Black brass grommets every 6 in. (152mm) along top edge with four grommets spaced along the bottom edge. Commonly installed horizontally. Color Black (This is an industnal possibility.) product and minor surface blemishes are a \\A Accuse/ biok® 6900 Interbay Blvd Tampa, Florida USR 33616 Telephone: (813)980-1440 www.Rcoustiblok.com soles@acoustiblok.com Information herein is, to the best of our knowledge and belief, accurate. However, since conditions of handling and use are beyond our control, we make no guarantee of results and assume no liability for damages incurred by the use of this material/product. All material/products may present unknown health hazards and should be used with caution. Although certain hazards are described herein, we cannot guarantee that these are the only hazards are that exist. Final determination of suitability of this material/product is the sole responsibility of the user. No representations or warranties, either expressed or implied, of merchantability, fitness for a particular purpose or any nature are made hereunder with respect to the information contained herein or the material/product to which the information refers. It is the responsibility of the user to comply with all applicable federal, state and local laws and regulations. Specifications subject to change without notice. Acoustiblok, Inc. 1 6900 Interbay Blvd. Tampa, FL 33616 1 (813) 980-1400 June 2012 To Whom It May Concern: An Age 55 and Over Homeowner Community Association Country Roads RV Property Owners Association, Inc. recently purchased and installed Acoustifence® on the Pickleball court within our community. Since being installed only a few years ago, the Pickleball court has been considered a nuisance by some of the nearby residents because of the sound that the paddle makes when hitting the ball. Pickleball is a mixture of badminton and tennis however; the ball is a large type of wiffleball. The Board of Directors saw the need to keep the game because of its growing popularity and abate the noise for the neighboring homes. In researching on the internet, a Board member found the website for Acoustiblok, ® Inc. After much research the Board of Directors voted unanimously to purchase and install the Acoustifence®. Upon installation the neighboring homes noticed a considerable reduction of the repetitive ball Play. With our close proximity to Phoenix, Arizona, other communities have asked to see and test for themselves the Acoustifence® product. I have attached to our testimony the correspondence from Bill Booth, President of The USA Pickleball Association. TM I can attest that Acoustifence® material is not difficult to install, can be easily blended into the aesthetics particularly if you have existing wind screens and does abate any noise pollution Feel fr exper e. contact me personally if you have any questions about our Community's eliss. ood, CAAM® Commun .• ciation Manager 5707 East 32nd Street, #1127 • Yuma, Arizona 85365 • FAX (928) 344-0080 • Resort (928) 344-8910 Acoustifence Testing Date: April 17, 2012 Location: Country Roads RV Village in Yuma. Weather: Temperature was approximately 85 degrees, wind. 3-5mph. Testers: Bill Booth Harry Kirkpatrick (designated hitter) Picldeball Equipment: S -Type Composite Extreme Paddle. New Dura Fast 40 outdoor balls. The S -Type paddle was used because, of the paddles in our possession at the time, it was closest to the mid-range of paddles in the Grand Pickleball Club sound test. Sound Meter: Sper Scientific Digital Datalogging Sound Meter, model 840013 We also had an analog meter provided by SCG CAM. Tests were done with our digital meter because it has the capability of locking on the maximum reading during an interval. That made it easy to identify the maximum instantaneous sound caused by a paddle hit. Test Method: Tests were made with the tester attempting to hit the ball with maximum force for a worst-case scenario. Readings were recorded with the meter at 50 feet from the point of impact. In the first case, the reading was taken through the sound curtain next to the home at a point 42 feet from the curtain. The paddle was 8 feet inside the court for a total distance of 50 feet. The second set of readings was recorded inside the court at a distance of 50 feet from the point of impact. Test results through the sound curtain in decibels (dba): 59.2, 51.5, 55.9, 54.7, 57 Average: 56.7 Note: the reading that has been struck out above and the readings that have been struck out below were not included in the averages because the hitter recognized that he had mishit the ball resulting in a lower reading than for a clean hit. Test results for no sound curtain: 71.8,66.5,6 ,68.9,6- ,71.1,64.2 Average: 68.5 Homeowner Report: The homeowner with the most complaints and living closest to the courts reports a significant reduction in sound level. He said that his wife often does not realize that they are playing on that court. He is reserving final judgment until some of the snowbirds return in the fall. The homeowner was very friendly, assisted with the test, and monitored the results. The homeowner had a theory that the sound would be louder at his home if the hits were not so close to the sound curtain. Therefore, we made several hits at the other end of the court, 90 feet from the home. His theory did not prove correct with an average reading of 52.8 db. Ambient sound levels were in the range of 47-51 db if we waited for quiet periods when there was no aircraft noise, traffic noise, or voices. At other times, ambient noise significantly exceeded paddle noise. We have the homeowner's contact information if necessary. Level volume Change 1 Loudness +40dB ,j 16 t +30 dB ;? 8 1 +20 dB 4 I +10 dB 1 2.0 = double - +6 dB. ' 1.52 times +3 dB 1 1.23 times 10 dB - -1- 1.0 -3 dB0.816 times -6 dB `r 0.660 times 1 10 dB 0.5 = half -20 dB 0.25 1t -30 d6 0.125 -4O dB 0.0625 1 Log. quantity Psycho quantity it dB change I Loudness multipl. I Acoustifenceproduct page. Conclusion: As shown in the table on the left, a 10 db reduction in sound represents a 50% reduction in sound as perceived by the human ear*. With an average reduction of 11.8 decibels, it is likely that the Acoustifence will result in a at least a 50% reduction to the sound experienced by nearby homeowners. That could be the difference between annoying and just barely perceptible. *Chart Source: http://www.sengnielaudio.com/TableOfSoundPressureLe vels.htm Photo: It is recommended that the product be installed on the inside of the court if the fence posts are outside the court as shown in the photo on the next page.