Bollard Acoustical Consultants, Inc. (BAC) | P.O. Box 7968, Auburn, CA 95604 | P: 530-537-2328 | bacnoise.com
Memorandum
To: Derek Finnegan Date: November 19, 2024
Lars Anderson & Associates, Inc.
4694 W Jacquelyn Avenue
Fresno, CA 93722
From: Dario Gotchet, Principal
Bollard Acoustical Consultants, Inc.
P.O. Box 7968
Auburn, CA 95604
Subject: SWC W Visalia Parkway & S Mooney Boulevard – Noise Study Revisions
Dear Derek,
Bollard Acoustical Consultants, Inc. (BAC ) completed a noise assessment for the SWC W Visalia Parkway & S Mooney Boulevard project in July 2024. It was brought to attention of BAC in October/November 2024 that revisions were made to the traffic memorandum previously prepared for the project by Kimley-Horn ( Traffic Memorandum for the Proposed Sam’s Fuel Project in the City of Visalia). In response to those revisions, BAC has conducted a re-analysis of project noise level exposure based on revisions contained in the Kimley-Horn traffic memorandum. The following BAC memorandum contains noise impact discussions associated with the revised Kimley-Horn traffic memorandum.
It should be noted that the function of this memorandum is to supplement the noise assessment previously prepared by BAC in July 2024. For the purposes of this memorandum, that assessment will be reference as the 2024 BAC Noise Study.
Summary of 2024 BAC Noise Study Impact Discussions & Warranted Revisions The 2024 BAC Noise Study contains a section titled “Noise Impacts Associated with Project On-Site Operations”. The section includes impact discussions for primary on-site site operations noise sources associated with the project consisting of on-site truck circulation, truck delivery activities, parking area movements, rooftop mechanical equipment (HVAC), car wash drying assembly equipment, and car wash vacuum equipment. These impact discussions are contained in Impacts 2-7 of the 2024 BAC Noise Study. Impact 8 of the 2024 BAC Noise Study contains a discussion on cumulative (combined) project on-site operations noise generation.
After a review of the revised Kimely-Horn traffic memorandum, and revised site design included in that document, it was determined by BAC that the changes identified in the documentation would affect the analysis and a ssociated results contained in the parking movements and cumulative project on-site operations noise impact discussions of the 2024 BAC Noise Study. Further, after a review of a traffic circulation diagram contained in the D. Finnegan
November 19, 2024
Kimley-Horn traffic memorandum, and based on the proximity to nearby residential uses, it was determined that an additional impact discussion for on-site passenger vehicle noise would be warranted.
The following sections of this memorandum contain noise level criteria applied to project on- site operations, a revised impact discussion for parking area movement noise, a new impact discussion for on-site passenger vehicle circulation noise, and a revised cumulative (combined) on-site operations noise impact discussion.
Noise Level Criteria Applied to Project On-Site Operations The Visalia General Plan exterior noise level standards provided in Table 7 of the 2024 BAC Noise Study were applied to project on-site operations noise sources. Additionally, the applied Visalia Municipal Code exterior noise level limits presented in Table 8 of 2024 BAC Noise Study were also used in the assessment of on-site operations noise compliance (these criteria are reproduced in this memorandum in Table 1 below). Finally, the residential interior noise level criteria established in Section 8.36.060 of the Visalia Municipal Code were also applied to project on-site operations noise generation.
Table 1
Adjusted Municipal Code Noise Level Standards Applied to the Project Nearest
Residences1
Average Measured
Noise Levels1 Unadjusted Standards
Adjustment for
Measured Ambient? Applied Standards2
Daytime Nighttime Day/Eve Nighttime Day/Eve Nighttime Day/Eve Nighttime L50 Lmax L50 Lmax L50 Lmax L50 Lmax L50 Lmax L50 Lmax L50 Lmax L50 Lmax Northwest 48 66 43 60 50 70 45 65 N N N N 50 70 45 65
West 47 67 47 63 50 70 45 65 N N Y N 50 70 47 65
Southwest 47 67 47 63 50 70 45 65 N N Y N 50 70 47 65
Southeast 48 68 44 62 50 70 45 65 N N N N 50 70 45 65
1 Lowest average measured hourly noise levels from Table 1 of the 2024 BAC Noise Study. 2 Applied standards based on results from BAC ambient noise level surveys and pursuant to Section 8.36.040.
Parking Operations Noise (2024 BAC Noise Study Impact 2) The project site design utilized in the re-analysis of parking operations noise is presented as Attachment A of this memorandum. This impact discussion also utilizes project trip generation data contained in the revised Kimley-Horn traffic memorandum.
As a means of determining potential noise exposure due to anchor tenant / fueling station parking lot activities, BAC utilized specific parking lot noise level measurements conducted by BAC. Specifically, a series of individual noise measurements were conducted of multiple vehicle types arriving and departing a parking area, including engines starting and stopping, car doors opening and closing, and persons conversing as they entered and exited the vehicles. The results of those measurements revealed that individual parking lot movements D. Finnegan
November 19, 2024
generated mean noise levels of approximately 70 dB SEL at a reference distance of 50 feet.
The maximum noise level associated with parking lot activity typically did not exceed 65 dB L
max at the same reference distance.
To compute hourly average (Leq) noise levels generated by parking activities, the approximate number of hourly operations in any given area and distance to the effective noise center of those activities is required. Based on trip generation data contained in the Kimley-Horn traffic memorandum, the fueling component of the project is estimated to generate approximately 3,899 daily Weekday vehicle trips with 237 AM peak hour and 270 PM peak hour trips. The Kimley-Horn documentation further indicates that the fueling component is estimated to generate approximately 3,943 daily Saturday vehicle trips with 268 AM peak hour and 201 PM peak hour trips. For the purpose of this analysi s, it was conservatively assumed that the fueling component of the project could generate 270 vehicle trips during a worst-case busy daytime hour, and that 50% of those 270 vehicle trips (calculated to be 135) could occur during a worst-case busy nighttime hour. In addition, the revised site design shows traffic circulation associated with two access points. For the purpose of this analysis, the aforementioned fueling component trip generation estimates were assumed to be evenly distributed between the two access points. Finally, it was conservatively assumed that parking area movements associated with the nearest 350 stalls of the anchor tenant parking area could either empty or fill during a worst-case busy hour nearest to a residential use. Parking lot noise exposure was determined using the following equation:
Peak Hour L
eq = 70+10*log (N) – 35.6
Where 70 is the SEL for a single automobile parking operation, N is the number of parking lot operations in a peak hour, and 35.6 is 10 times the logarithm of the number of seconds in an hour. Using the information provided above, and assuming standard spherical spreading loss (-6 dB per doubling of distance).
The Visalia General Plan noise standards are provided in terms of both hourly average (L eq)
and individual maximum (L max) noise levels. Because parking activities would occur throughout the course of an hour (i.e., in excess of 30 minutes), the Visalia Municipal Code median (L
50) noise level descriptor would be applicable. Based on the BAC file data, reference Kimley-Horn trip generation data, and operations assumptions above, and assuming standard spherical spreading loss (-6 dB per doubling of distance), project parking area noise exposure at the property lines of existing nearby residential uses was calculated and the results of those calculations are presented in Tables 2 and 3.
D. Finnegan
November 19, 2024
Table 2
Predicted Parking Area Noise Levels at Nearby Residential Uses – Daytime Hours Receiver
Offset
(dB)1
Predicted Combined Parking Noise Level (dB)2,3
Leq Lmax L50
Residential – Northwest -8 34 47 29
Residential – West -8 27 44 22
Residential – Southwest -8 34 47 29
Residential – Southeast -8 40 55 35
1 An offset of -8 dB was applied to account for shielding that would be provided by an existing solid wall (noise barrier) constructed along the perimet er of the project property boundar y. Existing wall illustrated in Attachment A. Offset based on the result from a source specific barrier evaluation. 2 Predicted combined noise levels from anchor t enant parking area and fueling station stalls/lanes. 3 Predicted combined noise level also include screening from proposed intervening buildings where applicable.
Source: BAC 2024
Table 3
Predicted Parking Area Noise Levels at Nearby Residential Uses – Nighttime Hours Receiver
Offset
(dB)1
Predicted Combined Parking Noise Level (dB)2,3,4
Leq Lmax L50
Residential – Northwest -8 31 47 26
Residential – West -8 24 44 <20
Residential – Southwest -8 31 47 26
Residential – Southeast -8 37 55 32
1 An offset of -8 dB was applied to account for shielding that would be provided by an existing solid wall (noise barrier) constructed along the perimet er of the project property boundar y. Existing wall illustrated in Attachment A. Offset based on the result from a source specific barrier evaluation. 2 Predicted combined noise levels from anchor t enant parking area and fueling station stalls/lanes. 3 Predicted combined noise level also include screening from proposed intervening buildings where applicable. 4 Predicted nighttime parking area activity noise reasonably assumes 50% of daytime trips.
Source: BAC 2024
As indicated in Tables 2 and 3, project parking activity noise levels are predicted to satisfy the Visalia General Plan hourly average (L eq) and maximum (Lmax) daytime and nighttime noise level standards at the nearest existing residential uses. Tables 2 and 3 data also indicate that project parking activity noise levels are predicted to satisfy the applied Visalia Municipal Code daytime/evening and nighttime median (L
50) exterior noise level limits at those nearest existing residential uses.
Standard residential construction (e.g., stucco siding, STC-27 windows, door weather- stripping, exterior wall insulation, composition plywood roof) typically results in an exterior to interior noise reduction of approximately 25 dB with windows closed and approximately 15 dB with windows open. However, the nearest existing residences appear to be manufactured homes with alternative siding/construction ty pes (e.g., wood) which could potentially have a lesser degree of exterior to interior noise level reduction than stucco siding. Therefore, this D. Finnegan
November 19, 2024
analysis conservatively assumes an exterior to interior noise level reduction of 20 dB. After consideration of an exterior to interior noise level reduction of 20 dB, and based on the predicted exterior property line noise levels presented in Tables 2 and 3, project parking area noise levels are expected to satisfy the strictest Visalia Municipal Code interior noise level criteria within the nearest existing residences (manufactured homes).
Using the average measured hourly daytime and nighttime noise levels at each monitoring location during the BAC ambient noise survey shown in Table 1 of the 2024 BAC Noise Study, and the predicted noise levels presented in Tables 2 and 3 of this memorandum, ambient plus project parking area noise level increases were calculated at the nearby residential uses. The results of those calculations are provided in Tables 4 and 5 below. As indicated in Tables 4 and 5, the calculated increases in ambient noise levels at the nearby residential uses would be well below the applied increase significance criterion of 5 dB.
Table 4
Calculated Project Parking Increases in Ambient Noise Levels – Daytime Hours Receiver1
Measured Ambient
Noise Level1
Predicted Combined
Parking Noise Level2
Ambient Plus Project
Noise Level3
Associated Noise
Level Increase (dB)4
Leq Lmax L50 Leq Lmax L50 Leq Lmax L50 Leq Lmax L50
Res – NW 53 67 49 34 47 29 52.7 67.4 49.4 0.1 <0.1 <0.1 Res – W 52 69 48 27 44 22 52.3 69.0 48.0 <0.1 <0.1 <0.1 Res – SW 52 69 48 34 47 29 52.4 69.0 48.1 0.1 <0.1 0.1
Res – SE 51 69 48 40 55 35 51.7 68.8 48.5 0.3 0.2 0.2
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Predicted combined parking noise levels during daytime hours presented in Table 2 of this memorandum. 3 Calculated logarithmic sum of daytime ambient noise level plus project-generated daytime noise level. 4 Calculated increase in ambient daytime noise level at each re ceiver location. Calculated increase is the result of the logarithmic addition of measured ambient noise level and project-generated noise level.
Source: BAC 2024
Table 5
Calculated Project Parking Increases in Ambient Noise Levels – Nighttime Hours Receiver1
Measured Ambient
Noise Level1
Predicted Combined
Parking Noise Level2
Ambient Plus Project
Noise Level3
Associated Noise
Level Increase (dB)4
Leq Lmax L50 Leq Lmax L50 Leq Lmax L50 Leq Lmax L50
Res – NW 47 60 44 31 47 26 47.4 60.5 44.4 0.1 0.2 0.1
Res – W 51 64 48 24 44 <20 50.7 63.7 47.7 <0.1 <0.1 <0.1 Res – SW 51 64 48 31 47 26 50.7 63.8 47.7 <0.1 0.1 <0.1 Res – SE 49 63 46 37 55 32 49.6 63.9 45.9 0.3 0.6 0.2
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Predicted combined parking noise levels during nigh ttime hours presented in Table 3 of this report. 3 Calculated logarithmic sum of nighttime ambient nois e level plus project-generated nighttime noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Calculated increase is the result of the logarithmic addition of measured ambient noise level and project-generated noise level.
Source: BAC 2024
D. Finnegan
November 19, 2024
Because noise exposure from project parking area movements is predicted to satisfy applicable Visalia General Plan and Visalia Municipal Code noise level criteria at the nearest existing residential uses, and because noise exposur e from those activities is not calculated to significantly increase ambient noise levels at those uses, this impact is identified as being less than significant.
On-Site Passenger Vehicle Circulation Noise (New Impact Discussion) This impact discussion utilizes project trip generation data contained in the revised Kimley- Horn traffic memorandum. The project site design referenced in the analysis of on-site passenger vehicle circulation noise is present ed as Attachment A of this memorandum. The site design shown in Attachment A shows two access points.
To quantify project on-site passenger vehicle circulation noise exposure, BAC utilized the Federal Highway Administration Highway Traffic Noise Prediction Model (FHWA-RD-77-108) with project trip generation data contained in the revised Kimley-Horn traffic memorandum.
The FHWA Model was developed to predict hourly L
eq values for free-flowing traffic conditions
and is considered to be accurate within 1.5 dB in most situations.
According to Kimley-Horn, the fueling component of the project is estimated to generate approximately 3,899 daily Weekday vehicle trips with 237 AM peak hour and 270 PM peak hour trips. The Kimley-Horn documentation further indicates that the fueling component is estimated to generate approximately 3,943 daily Saturday vehicle trips with 268 AM peak hour and 201 PM peak hour trips. For the purpose of this analysis, it was conservatively assumed that the fueling component of the project could generate 270 vehicle trips during a worst-case busy daytime hour, and that 50% of those 270 vehicle trips (calculated to be 135) could occur during a worst-case busy nighttime hour. In addition, the revised site design shows traffic circulation associated with two access points. For the purpose of this analysis, the aforementioned fueling component trip generati on estimates were assumed to be evenly distributed between the two access points.
The Visalia General Plan noise standards are provided in terms of both hourly average (L eq)
and individual maximum (L max) noise levels. Because parking activities would occur throughout the course of an hour (i.e., in excess of 30 minutes), the Visalia Municipal Code median (L
50) noise level descriptor would be applicable. Based on the BAC file data, reference Kimley-Horn trip generation data, and operations assumptions above, and assuming standard spherical spreading loss (-6 dB per doubling of distance), project on-site passenger vehicle circulation noise exposure at the property lines of existing nearby residential uses was calculated and the results of those calculations are presented in Tables 6 and 7.
D. Finnegan
November 19, 2024
Table 6
Predicted On-Site Vehicle Circulation Noise at Nearby Residential Uses – Daytime Hours Receiver
Offset
(dB)1
Predicted Vehicle Circulation Noise Level (dB)2
Leq Lmax L50
Residential – Northwest -8 37 47 32
Residential – West -8 25 35 20
Residential – Southwest -8 <20 <20 <20
Residential – Southeast -8 <20 25 <20
1 An offset of -8 dB was applied to account for shielding that would be provided by an existing solid wall (noise barrier) constructed along the perim eter of the project property boundar y. Existing wall illustrated in Attachment A. Offset based on the result from a source specific barrier evaluation. 2 Predicted noise level from closest on-site circulation lane to receiver location, and includes screening from proposed intervening buildings where applicable.
Source: BAC 2024
Table 7
Predicted On-Site Vehicle Circulation Noise at Nearby Residential Uses – Nighttime Hours Receiver
Offset
(dB)1
Predicted Vehicle Circulation Noise Level (dB)2,3
Leq Lmax L50
Residential – Northwest -8 35 47 30
Residential – West -8 23 35 <20
Residential – Southwest -8 <20 <20 <20
Residential – Southeast -8 <20 25 <20
1 An offset of -8 dB was applied to account for shielding that would be provided by an existing solid wall (noise barrier) constructed along the perim eter of the project property boundar y. Existing wall illustrated in Attachment A. Offset based on the result from a source specific barrier evaluation. 2 Predicted noise level from closest on-site circulation lane to receiver location, and includes screening from proposed intervening buildings where applicable.
3 Predicted nighttime vehicle circulation nois e reasonably assumes 50% of daytime trips.
Source: BAC 2024
As shown in Tables 6 and 7, project on-site passenger vehicle circulation noise levels are predicted to satisfy the Visalia General Plan hourly average (Leq) and maximum (Lmax) daytime and nighttime noise level standards at the nearest existing residential uses. Tables 6 and 7 data also indicate that project on-site passenger vehicle noise levels are predicted to satisfy the applied Visalia Municipal Code daytime/evening and nighttime median (L50) exterior noise level limits at those nearest existing residential uses.
Standard residential construction (e.g., stucco siding, STC-27 windows, door weather- stripping, exterior wall insulation, composition plywood roof) typically results in an exterior to interior noise reduction of approximately 25 dB with windows closed and approximately 15 dB with windows open. However, the nearest existing residences appear to be manufactured homes with alternative siding/construction ty pes (e.g., wood) which could potentially have a lesser degree of exterior to interior noise level reduction than stucco siding. Therefore, this D. Finnegan
November 19, 2024
analysis conservatively assumes an exterior to interior noise level reduction of 20 dB. After consideration of an exterior to interior noise level reduction of 20 dB, and based on the predicted exterior property line noise levels presented in Tables 6 and 7, project on-site passenger vehicle circulation noise levels are expected to satisfy the strictest Visalia Municipal Code interior noise level criteria within the nearest existing residences (manufactured homes).
Using the average measured hourly daytime and nighttime noise levels at each monitoring location during the BAC ambient noise survey shown in Table 1 of the 2024 BAC Noise Study, and the predicted noise levels presented in Tables 6 and 7 of this memorandum, ambient plus project on-site passenger vehicle circulation noise level increases were calculated at the nearby residential uses. The results of those calculations are provided in Tables 8 and 9 below. As indicated in Tables 8 and 9, the calculated increases in ambient noise levels at the nearby residential uses would be well below the applied increase significance criterion of 5 dB.
Table 8
Calculated Project Vehicle Circulation Increases in Ambient Noise Levels – Daytime Hour Receiver1
Measured Ambient
Noise Level1
Predicted Vehicle
Circ. Noise Level2
Ambient Plus Project
Noise Level3
Associated Noise
Level Increase (dB)4
Leq Lmax L50 Leq Lmax L50 Leq Lmax L50 Leq Lmax L50
Res – NW 53 67 49 37 47 32 52.8 67.4 49.4 0.1 <0.1 0.1
Res – W 52 69 48 25 35 20 52.3 69.0 48.0 <0.1 <0.1 <0.1 Res – SW 52 69 48 <20 <20 <20 52.3 69.0 48.0 <0.1 <0.1 <0.1 Res – SE 51 69 48 <20 25 <20 51.3 68.7 48.3 <0.1 <0.1 <0.1 1 Average measured daytime ambient noise levels assigned to re ceiver presented in Table 1 of the 2024 BAC Noise Study. 2 Predicted vehicle circulation noise levels during daytime hours presented in Table 6 of this memorandum. 3 Calculated logarithmic sum of daytime ambient noise level plus project-generated daytime noise level. 4 Calculated increase in ambient daytime noise level at each re ceiver location. Calculated increase is the result of the logarithmic addition of measured ambient noise level and project-generated noise level.
Source: BAC 2024
Table 9
Calculated Project Vehicle Circulation Increases in Ambient Noise Levels – Nighttime Hour Receiver1
Measured Ambient
Noise Level1
Predicted Vehicle
Circ. Noise Level2
Ambient Plus Project
Noise Level3
Associated Noise
Level Increase (dB)4
Leq Lmax L50 Leq Lmax L50 Leq Lmax L50 Leq Lmax L50
Res – NW 47 60 44 35 47 30 47.6 60.5 44.5 0.2 0.2 0.2
Res – W 51 64 48 23 35 <20 50.7 63.7 47.7 <0.1 <0.1 <0.1 Res – SW 51 64 48 <20 <20 <20 50.7 63.7 47.7 <0.1 <0.1 <0.1 Res – SE 49 63 46 <20 25 <20 49.3 63.3 45.7 <0.1 <0.1 <0.1 1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Predicted vehicle circulation noise levels during nighttime hours presented in Table 7 of this memorandum. 3 Calculated logarithmic sum of nighttime ambient nois e level plus project-generated nighttime noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Calculated increase is the result of the logarithmic addition of measured ambient noise level and project-generated noise level.
Source: BAC 2024
D. Finnegan
November 19, 2024
Because noise exposure from project on-site passenger vehicle circulation is predicted to satisfy applicable Visalia General Plan and Visalia Municipal Code noise level criteria at the nearest existing residential uses, and because noise exposure from those activities is not calculated to significantly increase ambient noise levels at those uses, this impact is identified as being less than significant.
Cumulative Project On-Site Operations Noise (2024 BAC Noise Study Impact 8) The calculated cumulative (combined hourly average L eq and median L 50) and highest predicted maximum (Lmax) noise levels from analyzed project operations at nearby residential uses are presented in Tables 10-15. The results presented in Tables 10-15 include data from both the 2024 BAC Noise Study and this memorandum.
Bollard Acoustical Consultants, Inc. (BAC) | P.O. Box 7968, Auburn, CA 95604 | P: 530-537-2328 | bacnoise.com
Table 10
Calculated Cumulative On-Site Operations Noise Levels – Daytime Hourly Average (Leq) Receiver
Predicted Noise Levels, Leq (dB)
Calculated
Cumulative,
Leq (dB)3
GP Daytime
Standard,
Leq Parking1
Vehicle
Circ.1
Loading
Dock2 Truck Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 34 37 23 52 40 39 24 53 50
Residential – W 27 25 30 51 42 22 <20 52 50
Residential – SW 34 <20 46 43 40 26 <20 49 50
Residential – SE 40 <20 38 37 41 27 22 45 50
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Calculated cumulative noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Red = exceedance of noise standard
Source: BAC 2024
Table 11
Highest Predicted On-Site Operations Noise Levels – Daytime Maximum (Lmax) Receiver
Predicted Noise Levels, Lmax (dB)
Highest
Predicted,
Lmax (dB)3
GP
Daytime
Standard,
Lmax
Applied MC
Daytime
Standard,
Lmax Parking1
Vehicle
Circ.1
Loading
Dock2 Truck Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 47 47 35 73 -- -- -- 73 70 70
Residential – W 44 35 42 73 -- -- -- 73 70 70
Residential – SW 47 <20 58 64 -- -- -- 64 70 70
Residential – SE 55 25 50 58 -- -- -- 58 70 70
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Highest predicted noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Red = exceedance of noise standard
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 12
Calculated Cumulative On-Site Operations Noise Levels – Daytime Median (L50) Receiver
Predicted Noise Levels, L50 (dB)
Calculated
Cumulative,
L50 (dB)3
Applied MC
Daytime
Standard,
L50 Parking1
Vehicle
Circ.1
Loading
Dock2 Truck Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 29 32 <20 47 40 39 24 49 50
Residential – W 22 20 25 46 42 22 <20 48 50
Residential – SW 29 <20 41 38 40 26 <20 45 50
Residential – SE 35 <20 33 32 41 27 22 43 50
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Calculated cumulative noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Source: BAC 2024
Table 13
Calculated Cumulative On-Site Operations Noise Levels – Nighttime Hourly Average (Leq) Receiver
Predicted Noise Levels, Leq (dB)
Calculated
Cumulative,
Leq (dB)3
GP
Nighttime
Standard,
Leq Parking1
Vehicle
Circ.1
Loading
Dock2 Truck Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 31 35 23 52 40 39 24 53 45
Residential – W 24 23 30 51 42 22 <20 52 45
Residential – SW 31 <20 46 43 40 26 <20 49 45
Residential – SE 37 <20 38 37 41 27 22 45 45
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Calculated cumulative noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Red = exceedance of noise standard
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 14
Highest Predicted On-Site Operations Noise Levels – Nighttime Maximum (Lmax) Receiver
Predicted Noise Levels, Lmax (dB)
Highest
Predicted,
Lmax (dB)3
GP
Nighttime
Standard,
Lmax
Applied MC
Nighttime
Standard,
Lmax Parking1
Vehicle
Circ.1
Loading
Dock2
Truck
Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 47 47 35 73 -- -- -- 73 65 65
Residential – W 44 35 42 73 -- -- -- 73 65 65
Residential – SW 47 <20 58 64 -- -- -- 64 65 65
Residential – SE 55 25 50 58 -- -- -- 58 65 65
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Highest predicted noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Red = exceedance of noise standard
Source: BAC 2024
Table 15
Calculated Cumulative On-Site Operations Noise Levels – Nighttime Median (L50) Receiver
Predicted Noise Levels, L50 (dB)
Calculated
Cumulative,
L50 (dB)3
Applied MC
Nighttime
Standard,
L50 Parking1
Vehicle
Circ.1
Loading
Dock2
Truck
Circ.2 HVAC2
Car Wash
Dryers2
Car Wash
Vacuums2
Residential – NW 26 30 <20 47 40 39 24 49 45
Residential – W <20 <20 25 46 42 22 <20 48 47
Residential – SW 26 <20 41 38 40 26 <20 45 47
Residential – SE 32 <20 33 32 41 27 22 43 45
1 Predicted noise levels presented in this memorandum, which include revised predictions (parking) and new predictions (on-site vehicle circulation). 2 Predicted noise levels presented in the 2024 BAC Noise Study (loading dock, on-site truck circulation, HVAC, car wash dryers, vacuums). 3 Calculated cumulative noise levels from the 2024 BAC Noise Study and impact discussions contained in this memorandum.
Red = exceedance of noise standard
Source: BAC 2024
Bollard Acoustical Consultants, Inc. (BAC) | P.O. Box 7968, Auburn, CA 95604 | P: 530-537-2328 | bacnoise.com As indicated in Tables 10-15, cumulative and highest predicted noise levels from on-site operations are calculated to exceed the Visalia General Plan daytime and nighttime hourly average (Leq) and maximum (Lmax) noise level standards at a portion of the nearest residential uses. Further, cumulative and highest predicted noise levels from on-site operations are also calculated to exceed a portion of the applied Visalia Municipal Code nighttime median (L 50)
and maximum (Lmax) exterior noise level limits at the nearest residential uses.
Standard residential construction (e.g., stucco siding, STC-27 windows, door weather- stripping, exterior wall insulation, composition plywood roof) typically results in an exterior to interior noise reduction of approximately 25 dB with windows closed and approximately 15 dB with windows open. However, the nearest existing residences appear to be manufactured homes with alternative siding/construction ty pes (e.g., wood) which could potentially have a lesser degree of exterior to interior noise level reduction than stucco siding. Therefore, this analysis conservatively assumes an exterior to interior noise level reduction of 20 dB. After consideration of an exterior to interior noise level reduction of 20 dB, and based on the predicted exterior property line noise levels presented in Tables 10-15, cumulative and highest predicted project on-site operations noise levels are expected to satisfy the strictest Visalia Municipal Code interior noise level criteria within the nearest existing residences.
Using the average measured hourly daytime and nighttime noise levels at each monitoring location during the BAC ambient noise survey shown in Table 1 of the 2024 BAC Noise Study, and the calculated cumulative/highest predicted noise levels presented in Tables 10-15 of this memorandum, ambient plus combined (and highest predicted) project on-site operations noise level increases were calculated at the nearby residential uses. The results of those calculations are provided in Tables 16-21.
Table 16
Calculated Cumulative On-Site Operations Ambient Increases – Daytime Leq Receiver
Measured Ambient
Noise Level, Leq1
Calculated Cumulative
Noise Level, Leq2
Ambient Plus Project
Noise Level, Leq3
Daytime Noise Level
Increase, Leq (dB)4
Res – NW 53 53 55.9 3.2
Res – W 52 52 55.1 2.8
Res – SW 52 49 53.9 1.6
Res – SE 51 45 52.3 1.0
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels presented in Table 10 of this memorandum. 3 Calculated logarithmic sum of daytime ambient noise level plus cumulative project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative project-generated noise level.
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 17
Highest Predicted On-Site Operations Ambient Increases – Daytime Lmax Receiver
Measured Ambient
Noise Level, Lmax1
Highest Predicted
Noise Level, Lmax2
Ambient Plus Project
Noise Level, Lmax3
Daytime Noise Level
Increase, Lmax (dB)4
Res – NW 67 73 74.1 6.7
Res – W 69 73 74.1 5.1
Res – SW 69 64 70.2 1.2
Res – SE 69 58 69.0 0.4
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of 2024 BAC Noise Study. 2 Highest predicted on-site operations noise leve ls presented in Table 11 of this memorandum. 3 Calculated logarithmic sum of daytime ambient noise le vel plus highest predicted project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and highest project-generated noise level.
Red = exceedance of increase significance threshold of 5 dB Source: BAC 2024
Table 18
Calculated Cumulative On-Site Operations Ambient Increases – Daytime L50 Receiver
Measured Ambient
Noise Level, L501
Calculated Cumulative
Noise Level, L502
Ambient Plus Project
Noise Level, L503
Daytime Noise Level
Increase, L50 (dB)4
Res – NW 49 49 52.1 2.8
Res – W 48 48 50.9 2.9
Res – SW 48 45 49.7 1.7
Res – SE 48 43 49.5 1.1
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels presented in Table 12 of this memorandum. 3 Calculated logarithmic sum of daytime ambient noise level plus cumulative project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative project-generated noise level.
Source: BAC 2024
Table 19
Calculated Cumulative On-Site Operations Ambient Increases – Nighttime Leq Receiver
Measured Ambient
Noise Level, Leq1
Calculated Cumulative
Noise Level, Leq2
Ambient Plus Project
Noise Level, Leq3
Nighttime Noise Level
Increase, Leq (dB)4
Res – NW 47 53 54.1 6.7
Res – W 51 52 54.3 3.6
Res – SW 51 49 52.8 2.2
Res – SE 49 45 50.6 1.3
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels presented in Table 13 of this memorandum. 3 Calculated logarithmic sum of nightti me ambient noise level plus cumulative project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative project-generated noise level.
Red = exceedance of increase significance threshold of 5 dB Source: BAC 2024
D. Finnegan
November 19, 2024
Table 20
Highest Predicted On-Site Operations Ambient Increases – Nighttime Lmax Receiver
Measured Ambient
Noise Level, Lmax1
Highest Predicted
Noise Level, Lmax2
Ambient Plus Project
Noise Level, Lmax3
Nighttime Noise Level
Increase, Lmax (dB)4
Res – NW 60 73 73.2 12.9
Res – W 64 73 73.1 9.4
Res – SW 64 64 67.0 3.3
Res – SE 63 58 64.5 1.2
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Highest predicted on-site operations noise leve ls presented in Table 14 of this memorandum. 3 Calculated logarithmic sum of nightti me ambient noise level plus highest predicted project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and highest project-generated noise level.
Red = exceedance of increase significance threshold of 5 dB Source: BAC 2024
Table 21
Calculated Cumulative On-Site Operations Ambient Increases – Nighttime L50 Receiver
Measured Ambient
Noise Level, L501
Calculated Cumulative
Noise Level, L502
Ambient Plus Project
Noise Level, L503
Nighttime Noise Level
Increase, L50 (dB)4
Res – NW 44 49 50.2 5.8
Res – W 48 48 50.7 3.0
Res – SW 48 45 49.5 1.8
Res – SE 46 43 47.4 1.8
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels presented in Table 15 of this memorandum. 3 Calculated logarithmic sum of nightti me ambient noise level plus cumulative project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative project-generated noise level.
Red = exceedance of increase significance threshold of 5 dB Source: BAC 2024
As shown in Tables 16-21, calculated increases in ambient noise levels would exceed the applied increase significance criterion of 5 dB at a portion of the closest residential uses.
Because cumulative/highest predicted project on-site operations noise exposure is predicted to exceed Visalia General Plan and applied Visalia Municipal Code daytime and nighttime noise level criteria at a portion of the nearby existing residential uses, and because daytime and nighttime increases in ambient noise levels associated with those operations are also calculated to exceed the applied increase significance criterion at a portion of those uses, this impact is identified as potentially significant.
D. Finnegan
November 19, 2024
Mitigation Measures:
To comply with Visalia General Plan and applied Visalia Municipal Code daytime and nighttime noise level criteria at nearby residential uses, and reduce project-generated increases in ambient daytime and nighttime noise levels to below the applied increase significance criterion at those uses, the following three (3) specific noise mitigation measures would be required of the project:
MM A: Implementation of Mitigation Measure 1 (MM 1) as outlined in the 2024 BAC Noise Study. Specifically, all project loadi ng dock activities shall be limited to daytime hours only (7:00 a.m. to 10:00 p.m.).
MM B: Implementation of Mitigation Measure 2A (MM 2A) as outlined in the 2024 BAC Noise Study. Specifically, the height of the existing masonry wall along the western project property boundary shall be increased to a minimum height of 8-feet. The location of the required 8-foot-tall masonry wall is illustrated in Figure 4 of the BAC Noise Study, and in Attachment B of this memorandum. It should be noted that Section 17.36.050 of the Visalia Municipal Code limits the height of commercial walls to 7-feet-in-height when located in a rear yard. As a result, the project applicant would be required to file for an Administrative Adjustment. As an alternative, an 8-foot-tall masonry wall may be constructed adjacent to the existing wall (i.e., off the property line).
MM C: Implementation of Mitigation Measure 2B (MM 2B) as outlined in the 2024 BAC Noise Study. Specifically, all on-site delivery truck circulation shall be limited to daytime hours only (7:00 a.m. to 10:00 p.m.).
Tables 22-27 of this memorandum show calculated cumulative (and highest predicted) on-site operations noise levels resulting from implementation of Mitigation Measures A, B and C as outlined above. Tables 28-33 data show the calculated cumulative/highest predicted on-site operations increases in ambient noise levels at the nearby residential uses resulting from implementation of Mitigation Measures A, B and C as outlined above.
Bollard Acoustical Consultants, Inc. (BAC) | P.O. Box 7968, Auburn, CA 95604 | P: 530-537-2328 | bacnoise.com
Table 22
Calculated Cumulative On-Site Operations Noise Levels – Daytime Hourly Average (Leq) – Mitigated Receiver
Predicted Noise Levels, Leq (dB)
Calculated
Cumulative,
Leq (dB)1
GP Daytime
Standard,
Leq Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 33 35 22 50 39 38 23 50 50
Residential – W 26 24 29 49 41 21 <20 50 50
Residential – SW 33 <20 45 41 39 25 <20 48 50
Residential – SE 39 <20 38 37 40 26 21 45 50
1 Calculated cumulative noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
Table 23
Highest Predicted On-Site Operations Noise Levels – Daytime Maximum (Lmax) – Mitigated Receiver
Predicted Noise Levels, Lmax (dB)
Highest
Predicted,
Lmax (dB)1
GP
Daytime
Standard,
Lmax
Applied MC
Daytime
Standard,
Lmax Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 46 45 34 70 -- -- -- 70 70 70
Residential – W 43 34 41 70 -- -- -- 70 70 70
Residential – SW 46 <20 57 62 -- -- -- 62 70 70
Residential – SE 54 24 50 58 -- -- -- 58 70 70
1 Highest predicted noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 24
Calculated Cumulative On-Site Operations Noise Levels – Daytime Median (L50) – Mitigated Receiver
Predicted Noise Levels, L50 (dB)
Calculated
Cumulative,
L50 (dB)1
Applied MC
Daytime
Standard,
L50 Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 28 30 <20 45 39 38 23 47 50
Residential – W 21 <20 24 44 41 21 <20 46 50
Residential – SW 28 <20 40 36 39 25 <20 44 50
Residential – SE 34 <20 33 32 40 26 21 42 50
1 Calculated cumulative noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
Table 25
Calculated Cumulative On-Site Operations Noise Levels – Nighttime Hourly Average (Leq) – Mitigated Receiver
Predicted Noise Levels, Leq (dB)
Calculated
Cumulative,
Leq (dB)1
GP
Nighttime
Standard,
Leq Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 30 33 -- -- 39 38 23 43 45
Residential – W 23 22 -- -- 41 21 <20 41 45
Residential – SW 30 <20 -- -- 39 25 <20 40 45
Residential – SE 36 <20 -- -- 40 26 21 42 45
1 Calculated cumulative noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 26
Highest Predicted On-Site Operations Noise Levels – Nighttime Maximum (Lmax) – Mitigated Receiver
Predicted Noise Levels, Lmax (dB)
Highest
Predicted,
Lmax (dB)1
GP
Nighttime
Standard,
Lmax
Applied MC
Nighttime
Standard,
Lmax Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 46 45 -- -- -- -- -- 46 65 65
Residential – W 43 34 -- -- -- -- -- 43 65 65
Residential – SW 46 <20 -- -- -- -- -- 46 65 65
Residential – SE 54 24 -- -- -- -- -- 54 65 65
1 Highest predicted noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
Table 27
Calculated Cumulative On-Site Operations Noise Levels – Nighttime Median (L50) – Mitigated Receiver
Predicted Noise Levels, L50 (dB)
Calculated
Cumulative,
L50 (dB)1
Applied MC
Nighttime
Standard,
L50 Parking
Vehicle
Circ.
Loading
Dock Truck Circ. HVAC
Car Wash
Dryers
Car Wash
Vacuums
Residential – NW 25 28 -- -- 39 38 23 42 45
Residential – W <20 <20 -- -- 41 21 <20 41 47
Residential – SW 25 <20 -- -- 39 25 <20 39 47
Residential – SE 31 <20 -- -- 40 26 21 41 45
1 Calculated cumulative noise levels with implementation of Mitigation Measures A, B and C as outlined in this memorandum.
Source: BAC 2024
Bollard Acoustical Consultants, Inc. (BAC) | P.O. Box 7968, Auburn, CA 95604 | P: 530-537-2328 | bacnoise.com
Table 28
Calculated Cumulative On-Site Operations Ambient Increases – Daytime Leq – Mitigated Receiver
Measured Ambient
Noise Level, Leq1
Calculated Cumulative
Noise Level, Leq2
Ambient Plus Project
Noise Level, Leq3
Daytime Noise Level
Increase, Leq (dB)4
Res – NW 53 50 54.7 2.0
Res – W 52 50 54.3 2.0
Res – SW 52 48 53.6 1.3
Res – SE 51 45 52.2 0.9
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of daytime ambient noise leve l plus cumulative mitigated project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative mitigated project-generated noise level.
Source: BAC 2024
Table 29
Highest Predicted On-Site Operations Ambient Increases – Daytime Lmax – Mitigated Receiver
Measured Ambient
Noise Level, Lmax1
Highest Predicted
Noise Level, Lmax2
Ambient Plus Project
Noise Level, Lmax3
Daytime Noise Level
Increase, Lmax (dB)4
Res – NW 67 70 71.9 4.5
Res – W 69 70 72.5 3.5
Res – SW 69 62 69.8 0.8
Res – SE 69 58 69.0 0.4
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of 2024 BAC Noise Study. 2 Highest predicted on-site operations noi se levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of daytime ambient noise level plus highest predicted mitigated project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and highest mitigated project-generated noise level.
Source: BAC 2024
Table 30
Calculated Cumulative On-Site Operations Ambient Increases – Daytime L50 – Mitigated Receiver
Measured Ambient
Noise Level, L501
Calculated Cumulative
Noise Level, L502
Ambient Plus Project
Noise Level, L503
Daytime Noise Level
Increase, L50 (dB)4
Res – NW 49 47 51.4 2.1
Res – W 48 46 50.1 2.1
Res – SW 48 44 49.4 1.4
Res – SE 48 42 49.3 1.0
1 Average measured daytime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of daytime ambient noise leve l plus cumulative mitigated project-generated noise level. 4 Calculated increase in ambient daytime noi se level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative mitigated project-generated noise level.
Source: BAC 2024
D. Finnegan
November 19, 2024
Table 31
Calculated Cumulative On-Site Operations Ambient Increases – Nighttime Leq – Mitigated Receiver
Measured Ambient
Noise Level, Leq1
Calculated Cumulative
Noise Level, Leq2
Ambient Plus Project
Noise Level, Leq3
Nighttime Noise Level
Increase, Leq (dB)4
Res – NW 47 43 48.6 1.3
Res – W 51 41 51.1 0.5
Res – SW 51 40 51.0 0.3
Res – SE 49 42 50.0 0.7
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of nighttime ambient noise leve l plus cumulative mitigated project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative mitigated project-generated noise level.
Source: BAC 2024
Table 32
Highest Predicted On-Site Operations Ambient Increases – Nighttime Lmax – Mitigated Receiver
Measured Ambient
Noise Level, Lmax1
Highest Predicted
Noise Level, Lmax2
Ambient Plus Project
Noise Level, Lmax3
Nighttime Noise Level
Increase, Lmax (dB)4
Res – NW 60 46 60.5 0.2
Res – W 64 43 63.7 <0.1
Res – SW 64 46 63.7 0.1
Res – SE 63 54 63.8 0.5
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Highest predicted on-site operations noi se levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of nighttime ambient noise leve l plus highest predicted mitigated project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and highest mitigated project-generated noise level.
Source: BAC 2024
Table 33
Calculated Cumulative On-Site Operations Ambient Increases – Nighttime L50 – Mitigated Receiver
Measured Ambient
Noise Level, L501
Calculated Cumulative
Noise Level, L502
Ambient Plus Project
Noise Level, L503
Nighttime Noise Level
Increase, L50 (dB)4
Res – NW 44 42 46.4 2.0
Res – W 48 41 48.5 0.9
Res – SW 48 39 48.3 0.6
Res – SE 46 41 46.9 1.2
1 Average measured nighttime ambient noise levels assigned to receiver presented in Table 1 of the 2024 BAC Noise Study. 2 Calculated cumulative on-site operations noise levels with implementation of Mitigation Measures A, B and C. 3 Calculated logarithmic sum of nighttime ambient noise leve l plus cumulative mitigated project-generated noise level. 4 Calculated increase in ambient nighttime noise level at each receiver location. Ca lculated increase is the result of the logarithmic addition of measured ambient noise level and cumulative mitigated project-generated noise level.
Source: BAC 2024
D. Finnegan
November 19, 2024
The mitigated noise levels presented in Tables 22-27 show compliance with Visalia General Plan and applied Visalia Municipal Code daytime and nighttime noise level criteria at nearby residential uses. As shown in Tables 28-33, the calculated mitigated increases in ambient noise levels at the nearby residential uses would satisfy the applied increase significance criterion of 5 dB.
Significance of Impact with Implementation of MM A-C: Less than Significant
Conclusions
Bollard Acoustical Consultants, Inc. (BAC) completed a noise assessment for the SWC W Visalia Parkway & S Mooney Boulevard project in July 2024 (2024 BAC Noise Study). It was brought to attention of BAC in October/November 2024 that revisions were made to the traffic memorandum prepared for the project by Kimley-Horn (Traffic Memorandum for the Proposed Sam’s Fuel Project in the City of Visalia ). After a review of the revised Kimely-Horn traffic memorandum, and revised site design included in that document, it was determined by BAC that the changes identified in the documentation would affect the analysis and associated results contained in the parking movements and cumulative project on-site operations noise impact discussions of the 2024 BAC Noise Study. Further, after a review of a traffic circulation diagram contained in the Kimley-Horn traffic memorandum, and based on the proximity to nearby residential uses, it was determined that an additional impact discussion for on-site passenger vehicle noise would be warranted.
Based on the analyses presented in this memorandum, including the results from a re-analysis of project parking movement noise, a new analysis of on-site traffic circulation, and a re- analysis of cumulative (combined) operations noise, project on-site operations noise is predicted to comply with applicable Visalia General Plan and Municipal Code noise level limits and applied ambient increase significance criteria at nearby residential uses provided that the project include the implementation of the mitigat ion measures outlined in this memorandum.
The mitigation measures identified in this memorandum are identical to those identified in the 2024 BAC Noise Study.
Please contact me at (530) 537-2328 or [email protected] if you have any questions or require additional information.
Sincerely,
Bollard Acoustical Consultants, Inc.
Dario Gotchet
Principal
Legend
Attachment A
0 100 200
Scale (Feet)
Project Boundary
Fueling Station
Existing Solid Wall (Noise Barrier)
On-Site Delivery Truck Circulation Route
Loading Dock Area
SWC W. Visalia Pkwy & S. Mooney Blvd
Visalia, California
Project Preliminary Site Plan
Car Wash
Anchor Tenant
Site drawing dated 10/9/2024
Legend
Attachment B
0 100 200
Scale (Feet)
Project Boundary
Fueling Station
Existing Solid Wall (Noise Barrier)
Car Wash
Anchor Tenant
Required 8’ Solid Wall (Noise Barrier)
SWC W. Visalia Pkwy & S. Mooney Blvd
Visalia, California
Mitigation Measure – 8’ Solid Wall
Site drawing dated 10/9/2024