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CC - Operational Noise Study
OPERATIONAL NOISE STUDY IN-N-OUT BURGER RESTAURANT PROJECT 5985 and 6037 N. Ten Mile Road Meridian, Idaho 83646 PREPARED BY: Meridian 860 Hampshire Road,Suite P Westlake Village,CA 91361 Consultants www.meridianconsultantsllc.com MAY 202 5 TABLE OF CONTENTS A. Executive Summary..........................................................................................................1 B. Project Description...........................................................................................................2 C. Existing Conditions...........................................................................................................5 D. Applicable Regulations.....................................................................................................8 E. Methodology....................................................................................................................9 F. Impact Analysis..............................................................................................................10 G. Certification...................................................................................................................18 Figure Page 1 Project Site Location ........................................................................................................3 2 Proposed Site Plan ...........................................................................................................4 3 Noise Monitoring Location................................................................................................6 4 Sensitive Receptor Map ....................................................... Error! Bookmark not defined. 5 Operational Noise Level Contour Map (Daytime) .............................................................14 6 Operational Noise Level Contour Map (Evening) ..............................................................15 7 Operational Noise Level Contour Map (Nighttime) ...........................................................16 8 Operational Noise Level Contour Map (24-hour CNEL).....................................................17 Table Page 1 Ambient Noise Measurements..........................................................................................5 2 Modeled Exterior Noise Levels From Restaurant Operational Sources..............................1 1 3 Modeled Exterior Noise Levels from Truck Deliveries .......................................................12 Appendices 1.0 Noise Monitoring Data Sheets 2.0 Sound PLAN Output Sheets Meridian Consultants i Operational Noise Study May2025 In-N-Out Burger Restaurant Project A. EXECUTIVE SUMMARY This Noise Study assesses and discusses the potential operational noise impacts that may occur with the In-N-Out Burger Restaurant Project(Project), located within the C-G Zone(General Retail& Service Commercial) in the City of Meridian, Idaho. The analysis describes the existing environment in the Project area; estimates future noise levels at surrounding land uses resulting from operation of the Project; and identifies the potential for significant impacts. The study summarizes the potential for the Project to conflict with applicable noise regulations, standards, or thresholds, and to identify any measures that may be necessary to reduce potentially significant impacts. 1 . Operational Noise The Project site is located within 300 feet of another drive-through facility directly to the north (i.e. Cafe Rio), and existing residences and a residential district directly to the west south of Costco (i.e. Olivia Apartments and Townhomes). Single-family residential uses and zoning also exist to the east across N.Ten Mile Road but are separated from the site by the 5-lane arterial street. Sources of noise generated by operation of the Project include parking activities from mobile vehicles, drive-through queuing, outdoor seating area and amplified speech from the speaker box. Additionally,deliveries are proposes to occur between the hours of 2:00 AM and 9:00 AM during non- business hours. Noise levels would not result in a 3 or 5 dBA increase above the measured daytime, evening, nighttime and 24-hour CNEL ambient during both operation and delivery activities. Meridian Consultants 1 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project B. PROJECT DESCRIPTION The 95,860 square foot(2.2 acre) Project site is located at 5985 and 6037 N.Ten Mile Road in the City of Meridian (refer to Figure 1: Project Site Location). The property was annexed as part of a larger development area consisting of residential and commercial property zoned R-40 and C-G. The Project site is currently vacant and undeveloped. The Project would include construction of a 3,886 square foot In-N-Out Burger Restaurant with a drive-through lane. The restaurant would provide indoor seating with a capacity of 74 seats and outdoor seating with a capacity of 46 seats (12 tables). The drive-through would have a queueing capacity of 29 cars and parking spaces for up to 73 vehicles (refer to Figure 2: Proposed Site Plan). This restaurant will be equipped with three burger grills. Two grills will operate at all times, and activation of the third grill will be done in response to high dine-in or, more typically, high drive- through demand as activating the third grill significantly increases the speed at which drive-through orders are delivered to customer vehicles.Standard store operating procedure requires that as soon as the drive-through queue reaches the 81h or 9th car (where the menu board/order speaker is Located), In-N-Out associates are deployed outside to take orders using hand-held ordering tablets. The use of these tablets allows orders to funnel into the kitchen faster than ordering at the menu board resulting in the shortest possible drive-through vehicle queues. Awareness of the queue reaching the menu board (and deployment of associates with hand-held tablets) is enhanced with outdoor cameras and indoor monitors.There will be between 4 and 6 outdoor cameras on this site, with 3 or 4 of them specifically viewing the drive-through lane. These cameras display on multiple monitors located inside the restaurant including at the manager's office,above the grills,and at both the pay and pickup windows. There is no delivery dock or designated delivery parking bay required on the premises as deliveries are made only by In-N-Out owned operated vehicles, after the restaurant is closed to the public between the hours of 2:00 AM and 9:00 AM. Delivery trucks operate after hours to allow the parking and queue management to be at its most effective throughout the day. Allowing trucks to deliver after-hours ensures that truck traffic is not on the road during either morning or evening peak hours. Site access for these delivery trucks would be from N.Ten Mile Road and W. Lost Rapids and would unload at the service entrance located adjacent to parking stalls#1 through#11. The restaurant would operate seven days a week, from 10:30 AM to 1:00 AM Sunday through Thursday, and from 10:30 AM to 1:30 AM on Friday and Saturday.The restaurant, drive-through, and parking lot, as with all In-N-Out Burger restaurants, would be well-lit and meticulously maintained. The restaurant would be staffed by approximately 10 to 12 associates per shift,with 3 shifts per day. Meridian Consultants 2 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project .� w SIIVP.0 F�Eb'�C St f' .. Sliver Rive Ln MF r' •' ^��ina+%rniriri��-.•:rim':'' •, •. � ' �rr•� m - ,�o. _ .� _� .:� ;� .� ;�; .I ��` - W`Everest(St 1 IBC �• i_J � f =E 5 - . . - �CM�L'Rf'fRf.x � h 1 � .J✓ZJ fLCfyr 7 C v� rt }ri rrr �r�; U,Ls N.' [S] iJ V•i .r - Uice. • * s +..1 ,a:'[ :• _I -- E'�-m _, SumiT. 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CEE I I ACCESSIBLE SIGNAGE R "} chi :.'1���•''�'' " °C'"' P . AND BOLLARD(3) 39 50 3 PAY :::j w 11 .ryry.II yy 3 I I '�.40 R-3 ® -� WINDOW L ;': '.1.�'.'J'.'•••• " "F• STONER 1 �''} :;}�{j, .'. qqry�I 16$'�: 35.5' 51 EI ANCE - 29' 39 5 ACCESSIBLE 4 �awN I 52 PARKING DECORAT VE IN4FOIlT } 1. R .. o.1 o SYMBOL BOLLARD(12) ._WIMP, rz 15' .'1 17'38 28' :j N 2554.89 CP I 25 MIN. s3 9' 28' ®5 3,886 SF 1 �„� (f,J .':�:f: (CLASSIC) 2 0 ::'�"•t Ir.I.' W II,� :�'�:' 37 I 2s MIN. LO{. II I 54 6 7 II I 36 73 BLACK C C. ss^ m f J 7 0 3 :!.] 1. 3 I �} o,PzS V IJ V Il Uw �_r- a � :':::j '��'•'• U o :.}: 56 w 34 U I I57 •� '' '�' YELP TO BIKE SIGN 16' 33 9 m 4 ":I.'' ......' "Y Woo IP PP 3" PROPOSED 1,295 S.F.(ROH - - " ,.,:..} RISERS W AN TRANSF. 14' 59 COVER TALL ATTACHED P 32 COVERED PATIO STRUCTURE YY o3ao LP {: 31 AT 5 ;!{•.•�'�..... SL SLP 53236C o$ 30 � I _ _ _ _ _ 60 _ _ _ _ _ 1. 12 12' �3z R=3' R=3' 3' 5� "s TE roe — Fw o¢a I I a7' I - 6 I 1. REAREA U °..� BLA L J 97' o,_, .: f1(j{ ,•�, II 52' 45' 21 31 o b� CONIC. m �`' :::'.:{?•••.�••.'.'.'.'4 5. 10. II Lac DIE' � ._. ::�:;�•.'... ... OFN 3 1o' 10' 2 63 64 65 6 67 u°Q� i =2'.. '^ 1'_.: ....{. I 3m {{{.�.'.' EX.6"CONIC. �I TYP. .'I::::::::.:::::. :..!...:..{.•".'!' ICURB A D 18" `;:q:::' 19'29 28 ::9;:{.`: .'9:4":: 28' 14 7' :I;:!''.:''::;:' ':':, RUC•a GUTTERN 25 MIN. 25 MIN. I 1 L 1 1 I 73 72 71 70 6 68 1 'I'"";�:':';.; 128' } 1J r'yI J w 28 MENU BOARD ':I::':.:;: }j{ '••'.r."'. ; �m I I IT AND SPEAKER 12' I I I 27 rcl al ¢I rcl n �..: 1....r.�..l. " RI A ST I z_ 16 ETE TURN RIG T SI N 10 I I 26 I �I rc N A.C.PAVEMENTf = R-4 25 24 23 22 20 19 18 R:25 11 wLB b 'I _ 9' N '.F.•1l• � I Z II ^7 O ry Q,Q Y I CS 3 8 72' I 13 •:f:'•'.I. 47.5' I 8 4 •, e KE 20 16 pp {z 15 GRADING 9 9 w q y 1I LIMIT .DRADW R-20 25 23 2 D 19 17 INDS y( I1 L1M1T GRAD M NT SIGN + 15 = ............ 1 I'' 555.I3 S � �OP I N 10 1p, .... INOQ$:'' EOGF s"*"r W A .. ....... �•. s'.i-4 is '-'-r. .�ri Rq O 5 S S MJ P I]=OB C"---��. .. ..LIIWFI'. ..'..'.'.'.@AbYN.'.'.'.'.. T P MP N89 1 W CONIC SID WALK 10082 m a TSP �m :a sa"8a Bs �4:: � I � sL CURB W. LOST RAPIDS �� AND i6"GUTTER (PUBLIC STREET, DRIVE _�� o REG W I 15 30 60 j)A0 PPROXIMATE SCALE IN FEET SOURCE: MSL Engineering—2025 FIGURE 2 Meridian Proposed Site Plan Consultants 121-019-25 C. EXISTING CONDITIONS 1 . Ambient Noise Levels Long-term sound monitoring was conducted within the Project site to measure the ambient sound environment in the vicinity. Measurements were taken over 24-hour period between April 29—April 30, 2025, and provided in Table 1: Ambient Noise Measurements. Figure 3: Noise Monitoring Location depicts locations where the long-term ambient noise measurements were conducted. As shown in Table 1, ambient noise level averages were 67.0 dBA during the daytime period (7:00 AM— 7:00 PM),71.9 dBA duringthe evening period (7:00 PM—10:00 PM)and 67.3 dBA duringthe nighttime period (10:00 PM—7:00 AM).Additionally, 24-hour CNEL averages were 67.5 dBA CNEL. TABLE 1: AMBIENT NOISE MEASUREMENTS Location Daytime Evening Nighttime 24-hour CNEL Project site 67.0 dBA 71.9 dBA 67.3 dBA 67.5 dBA Notes:dBA=A-weighted decibels;Leq=average equivalent sound level. Source:Refer to Appendix 1.0:Noise Monitoring Data Sheets. 2. Sensitive Land Uses As mentioned previously,the property was annexed as part of a larger development area consisting of residential and commercial property zoned R-40 and C-G. The Project site is within 300 feet of another drive-through facility directly to the north (i.e. Cafe Rio), and existing residences and a residential district directly to the west(i.e. Olivia Apartments and Townhomes, zoned R-40). Single- family residential uses and zoning also exist to the east across N.Ten Mile Road, but are separated from the site by a 5-lane arterial street(refer to Figure 4:Sensitive Receptor Map). For purposes of this analysis,the following sensitive receptors were identified: • Receptor#1 (R1):Olivia Apartments and Townhomes(5985 N.Ten Mile Road). • Receptor#2(R2):Olivia Apartments and Townhomes(located adjacent to the west). • Receptor#3(R3): Residential uses located on the corner of N.Ten Mile Road and W. Lost Rapids Drive(3150 W. Lost Rapids Drive). • Receptor#4(R4): Residential uses located along N.Ten Mile adjacent to the east(6040 N.Ten Mile Road). • Receptor#5(R5): Residential uses located along N. Fairborn Avenue(5872 N. Fairborn Avenue). • Receptor#6(R6):The Church of Jesus Christ of Latter-day Saints(5855 N.Ten Mile Road). Meridian Consultants 5 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project r t- ��ti ► , r + • k�. it R�1 a ) I iC Q Noise Monitor Project Site 0 25 50 100 r N �r. APPROXIMATE SCALE IN FEET SOURCE: Google Earth-2025 FIGURE 3 Merldian Noise Monitoring Location Consultants 121-016-25 s[ R1 Olivia Apartments and Townhomes x (5985 N. Ten Mile Road) R2 Olivia Apartments and Townhomes R3 Residential (3150 W. Lost Rapids Drive) R4 Residential (6040 N. Ten Mile Road) R5 Residential (5872 N. Fairborn Avenue) Q R6 The Church of Jesus Christ of Latter-day J - R4 i Saints (5855 N. Ten Mile Road) ri' �' +• - ` r .!• f L. .f• � [ ,,,r .� + `- ••fir I R.1 e7z m�11 r r a 0� - 4w R5 Legend , Project Site 0 75 150 200 APPROXIMATE SCALE IN FEET n SOURCE: Google Earth—2025 FIGURE 4 Meridian Sensitive Receptor Map C rxi.sullrants 121-019-25 D. APPLICABLE REGULATIONS 1 . City of Meridian The City of Meridian addresses noise disturbances under Title 6, Chapter 3 of its Municipal Code. Key provisions include: • Quiet Hours: Noise is prohibited between 11:00 PM and 6:00 AM. • Public Disturbance Noises: Certain sounds are considered public disturbances if they unreasonably interfere with the peace and comfort of others.These include o Frequent or continuous sounding of horns or sirens, except as a warning of danger. o Repetitive motor vehicle sounds in residential areas. o Yelling, shouting, or singing on public streets that disturb nearby residents. o Loud sounds emanating from buildings, such as music or social gatherings. o Motor vehicle sound systems audible beyond 50 feet. o Audio equipment operated at volumes audible beyond 60 feet or that disturb others. • Exemptions: Certain sounds are exempt, including those from emergency vehicles, authorized public events, and specific equipment used within zoning regulations. • Enforcement:Violations are classified as misdemeanors. Meridian Consultants 8 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project E. METHODOLOGY 1 . Ambient Noise Measurements Noise-level monitoring was conducted between April 29—April 30,2025 at the Project site,as shown in Figure 3.Ambient noise levels were measured over a 24-hour period to assess baseline acoustic conditions at the site and evaluate the potential impact of new noise sources. Specifically, the analysis aimed to determine whether any future changes could result in increases of 3 dBA or 5 dBA, which are standard thresholds for perceptible and potentially significant noise increases. 2. Operational Noise Operational noise levels related to the drive-through, parking, and amplified speech emanating from the speaker were calculated with the noise model SoundPLAN, a commercially available software that produces computer simulations of noise propagation from sources.The SoundPLAN modeling software accounts for large differences in topography, and the presence of intervening structures or landscaping that would block a direct line of sight between operation activities from the proposed Project Site and nearby sensitive receptors. The operational noise levels were calculated for sensitive-receptor locations using SoundPLAN. It was assumed operating hours would take place between 10:00 AM and 1:30 AM.The SoundPLAN model includes real-world noise Levels and contains noise data in a reference library.To quantify events related to the noise sources generated by the proposed use,the following assumptions were used: • Cars entering and exiting the parking lot and queuing of 29 cars at the drive through, a line source was modeled with a sound power levell (LwA) of 47 dB/m, m2, as referenced in the SoundPLAN noise library for cars driving on asphalt at less than 30 kilometers per hour (18.6 miles per hour); • The menu board and speaker, a point source was modeled with a LwA of 65 dB, as referenced in the SoundPLAN noise library for speaking, normal voice; and • The outdoor seating area, an area source was modeled with a LwA of 65 dB, as referenced in the SoundPLAN noise library for speaking, normal voice. • Truck deliveries at any point between the hours of 2:00 AM and 9:00 AM, a line source was modeled with a LwA of 80 dB, as referenced in the SoundPLAN noise library for truck loading general cargo It is important to note the trash compactor would be positioned behind a wall enclosure. Because of its placement, noise generated by the trash compactor will be attenuated by the wall. 1 The Sound Power Level represents the total sound energy produced by the source under the specified operating conditions.Sound Power Levels cannot be measured directly;instead they are computed from reference sound pressure level measurements. Meridian Consultants 9 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project F. IMPACT ANALYSIS The City of Meridian does not specify a quantitative noise threshold or land use compatibility standard in its municipal code. Therefore, for the purpose of this technical analysis, the following threshold of significance is applied based on guidance from the Federal Interagency Committee on Noise (FICON), the Federal Transit Administration (FTA), and general industry standards for community noise. A Project would result in a significant noise impact if the operational noise associated with the proposed use would: • Result in a substantial permanent increase in ambient noise levels at nearby sensitive receptors (e.g., residences, schools)of 5 dBA CNEL or more,where the existing ambient noise level is less than 60 dBA CNEL; • Result in an increase of 3 dBA CNEL or more where existing ambient noise levels are 60 dBA CNEL or greater; or • Exceed a cumulative ambient noise level of 65 dBA CNEL at residential property lines, which represents a generally accepted upper threshold for "normally acceptable" noise exposure for residential uses under Housing and Urban Development(HUD) These thresholds reflect changes in noise that are generally perceptible to the human ear and have the potential to result in community annoyance or interference with speech and sleep. Where applicable, these thresholds are compared against measured ambient conditions to assess potential impacts from project-related noise. 1 . Operation Impacts (a) Restaurant Noise As mentioned previously, sources of operational noise include parking activities from mobile vehicles, drive-through queuing for a capacity of 29 vehicles, outdoor seating area and amplified speech from the speaker box. Source contributed noise levels throughout the daytime, evening, nighttime and 24-hour CNEL periods from operation of the proposed project are shown in Table 2: Modeled Exterior Noise Levels from Restaurant Operational Sources. For illustrative purposes, noise levels generated from the Proposed Project to the adjacent sensitive receptors are shown graphically in Figure 5: Operational Noise Level Contour Map(Daytime),Figure 6:Operational Noise Level Contour Map (Evening), Figure 7: Operational Noise Level Contour Map(Nighttime)and Figure 8: Operational Noise Level Contour Map (24-hour CNEL). Sensitive receptors shown graphically include the residential district directly to the west(i.e. Olivia Apartments and Townhomes, zoned R-40) and the single-family residential uses and zoning to the east across N.Ten Mile Road Meridian Consultants 10 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project Table 2 compares the modeled exterior noise levels from Project-related noise sources that operate on a daily basis to the ambient noise measurements provided in Table 1 above. As shown in Table 2, modeled daytime noise levels generated from the Project site would range from a low of 28.9 dBA at the residential uses along N. Fairborn Avenue (R5) to a high of 38.7 dBA at the Olive Apartments and Townhomes (R2). Evening noise levels would range from a low of 30.4 dBA(R5)to a high of 40.2 dBA(R2). Nighttime noise levels would range from a low of 26.3 dBA(R5)to a high of 36.1 dBA(R2). Additionally, 24-hour CNEL noise levels would range from a low of 33.8 dBA CNEL (R5) to a high of 43.7 dBA CNEL(R2). Noise levels generated from the Project would not result in a 3 or 5 dBA increase at the adjacent sensitive receptors above the daytime, evening, nighttime or 24-hour CNEL measured baseline Levels identified in Table 1. As such, operational noise level impacts would not be considered significant. SOURCESTABLE 2: MODELED EXTERIOR NOISE LEVELS FROM RESTAURANT OPERATIONAL ModeledMonitoring Site Time Period Daytime 35.5 67.0 -- Evening 37.0 71.9 -- R1(Olivia Apartments and Townhomes,5985 N.Ten Mile Road) Nighttime 32.9 67.3 -- 24-hour 40.4 67.5 -- CNEL Daytime 38.7 67.0 -- Evening 40.2 71.9 -- R2(Olivia Apartments and Townhomes,adjacent to the west) Nighttime 36.1 67.3 -- 24-hour 43.7 67.5 -- CNEL Daytime 33.8 67.0 -- Evening 35.3 71.9 -- R3(3150 W.Lost Rapids Drive) Nighttime 31.2 67.3 -- 24-hour 38.8 67.5 -- CNEL Daytime 31.7 67.0 -- Evening 33.2 71.9 -- R4(6050 N.Ten Mile Road) Nighttime 29.1 67.3 -- 24-hour 36.6 67.5 -- CNEL Daytime 28.9 67.0 -- R5(5872 N.Fairborn Avenue) Evening 30.4 71.9 -- Nighttime 26.3 67.3 -- Meridian Consultants 1 1 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project SOURCESTABLE 2: MODELED EXTERIOR NOISE LEVELS FROM RESTAURANT OPERATIONAL ModeledMonitoring Site Time Period 24-hour 33.8 67.5 -- CNEL Daytime 29.0 67.0 -- Evening 30.5 71.9 -- R6(5855 N.Ten Mile Road) Nighttime 26.4 67.3 -- 24-hour 33.9 67.5 -- CNEL Note:Daytime:7:00 AM-7:00 PM;Evening:7:00 PM-10:00 PM;Nighttime:10:00 PM-7:00 AM. Source:Refer to Appendix 2.0 for Sound PLAN Output Sheets. W Truck Deliveries As mentioned previously, truck deliveries would take place no more than once daily between the hours of 2:00 AM to 9:00 AM lasting less than an hour. Site access for these delivery trucks would be from W. Lost Rapids Drive and would unload at the service entrance located adjacent to parking stalls#1 through#11. Table 3: Modeled Exterior Noise Levels from Truck Deliveries, compares the modeled exterior noise levels from truck deliveries that operate on a daily basis to the ambient noise measurements provided in Table 1 above. As shown in Table 3, modeled daytime noise levels would range from a low of 15.0 dBA at the residential use along N. Ten Mile Road (R4)to a high of 31.8 dBA at the Olivia Apartments and Townhomes(R1). Nighttime noise levels would range from a low of 18.7 dBA(R4)to a high of 37.1 dBA(R1).Additionally, 24-hour CNEL noise levels would range from a low of 24.6 dBA CNEL (R4) to a high of 43.0 dBA CNEL at the Olivia Apartments and Townhomes (R1 and R2). Truck deliveries would not take place during the evening period. Noise levels generated from the Project would not result in a 3 or 5 dBA increase at the adjacent sensitive receptors above the daytime, evening, nighttime or 24-hour CNEL measured baseline levels identified in Table 1. As such, impacts from truck deliveries would not be considered significant. Meridian Consultants 12 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project MODELEDTABLE 3: •R NOISE LEVELS FROM ModeledMonitoring Site Time Period Levels Levels Ambient Daytime 31.8 67.0 -- Evening -- 71.9 -- R1(Olivia Apartments and Townhomes,5985 N.Ten Mile Road) Nighttime 37.1 67.3 -- 24-hour 43.0 67.5 -- CNEL Daytime 31.4 67.0 -- Evening -- 71.9 -- R2(Olivia Apartments and Townhomes,adjacent to the west) Nighttime 37.0 67.3 -- 24-hour 43.0 67.5 -- CNEL Daytime 16.1 67.0 -- Evening -- 71.9 -- R3(3150 W.Lost Rapids Drive) Nighttime 21.3 67.3 -- 24-hour 27.3 67.5 -- CNEL Daytime 13.5 67.0 -- Evening -- 71.9 -- R4(6050 N.Ten Mile Road) Nighttime 18.7 67.3 -- 24-hour 24.6 67.5 -- CNEL Daytime 16.1 67.0 -- Evening -- 71.9 -- R5(5872 N.Fairborn Avenue) Nighttime 21.3 67.3 -- 24-hour 27.2 67.5 -- CNEL Daytime 15.0 67.0 -- Evening -- 71.9 -- R6(5855 N.Ten Mile Road) Nighttime 20.2 67.3 -- 24-hour 26.2 67.5 -- CNEL Note:Note:Daytime:7:00 AM-7:00 PM;Evening:7:00 PM-10:00 PM;Nighttime:10:00 PM-7:00 AM. Deliveries would not occur during the evening period of 7:00 PM-10:00 PM Source:Ref erto Appendix 2.0for Sou ndPLAN Outp ut Sheets. Meridian Consultants 13 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project �'l•�.1IPc,reb lit 11108r rl Noise level Leq,d 4-*4�P o r- m, �(I� r�l6111G�t r 75 80 it j � 35 Y � 60 - 65 t 55 = 60 30 50 SS 45 - SO 40 - 45 35 - 40 fe �. I* 35 I 30 - 35 y � w <= 30 35 �• tea.. + - * 30 � :4 35 rq, � A — Tr r, ■ 30 A Ilk 0 45 90 180 270 360 N feet 3vf I� SOURCE: Meridian—2025 FIGURE 5 W)erigian Operational Noise Level Contour Map (Daytime) (on.sillrants 121-019-25 ,14F1! uric"�11�1�lpt�r r� rfi 1 Im #�� �� � Noise level Le � e� R R ,. •�r �" y ■1'�. in d B(A) .■ ,. 80 1. •r 4. I�� f �� F =1�i�� !� dr . ,.; -. ,..:: •• '� - 75 - 80 WT 65 70 35 jt 55 - 60 ! R 50 - 55 45 - 50 S 35 40 - 45 35 - 40 �� av • �� .ti�, 30 - 35 i <= 30 35 . 35 Zer 0 �. r, ■ s - � � I u ` 0 45 90 180 270 36f — N feet F- SOURCE: Meridian—2025 FIGURE 6 Meridian Operational Noise Level Contour Map (Evening) Cons ill rant s 121-019-25 11 �E�r�bll�glpt�C re r q�F�$F iilj@fet�lB � .- Noise level F; I'r �ltlf�cp q ae K •�,• r in dB(A) o - r �� ;' ■ > 80 Ida1 iFli�lell�l� � r - 75 - 80 E ;.. 9 e 60 — 65 t 55 — 60 S0 — 55 F 45 — 50 40 — 45 r 35 — 40 35 o w 35dL n. • =: 30 r �_Ott % 77 } y - 0 45 90 180 270 360 N IIIIII feet SOURCE: Meridian-2025 FIGURE 7 W)erigian Operational Noise Level Contour Map (Nighttime) (on.sillrants 121-019-25 ,l4F=!! Csl�e its 11106r t ri��� 1 _£ 111 r e !B d .�.•- Noise level r � � V!11 ?1� c 24-hour CNEL t•• r riller ■ty+ 'r`; R ! '"t in dB(A) c 1IfFr ! lelllr r ``� '! > 80 35 s� *� ,....r•... �� 75 — 80 ■ 65 — 70 - 60 — 65 ► 55 — 60 35 •� ' 50 — 55 30 45 — 50 sy rp 'u 60 35 40 30 — 35 sw 35 1 <= 30 1 y35 0. t.' er 35 * F " L A ` 0 45 90 180 270 360 feet 30 SOURCE: Meridian—2025 FIGURE 8 Meridian Operational Noise Level Contour Map (24-hour CNEL) C 0awiltrants 121-019-25 G. CERTIFICATION The contents of this noise study represent an accurate depiction of the noise environment and impacts associated with the proposed In-N-Out Burger Restaurant Project. The information contained in this noise study is based on the best available information at the time of preparation. If you have any questions, please contact me directly at(818)415-7274. Sincerely, Christ K rikian, INCE Partner I Director of Air Quality&Acoustics ckirikian@meridianconsultantsllc.com Meridian Consultants 18 Operational Noise Study May 2025 In-N-Out Burger Restaurant Project APPENDIX 1 Noise Monitoring Data Spreadsheets Monitoring Location: Site A Date:April 29-30,2025 Evening/Night Monitoring Monitored Logarithmic Adjustments Period Leq Equivalent 10 dB 5 dB Midnight 0/24 54.5 278853 2788531 881811 Leq Morning Peak Hour 7:00-10:00 a.m. am 1:00 100 46.9 48879 488786 154568 1 65.6 JdBA 2:00 200 47.0 50030 500299 158208 3:00 300 56.1 408811 4088114 1292775 Leq Evening Peak Hour 4:00-8:00 p.m. 4:00 400 53.3 215303 2153033 680849 1 66.6 dBA 5:00 500 58.9 773072 7730715 2444667 6:00 600 63.1 2025180 20251802 6404182 7:00 700 65.1 3259473 32594731 10307359 8:00 800 66.2 4184042 41840421 13231103 9:00 900 65.3 3373948 33739481 10669361 Leq Daytime 7:00 am-7:00 p.m. Leq Evening 7:00 pm-10:00 p.m. Leq Nighttime 10:00 pm-7:00 a.m. 10:00 1000 65.4 3506548 35065476 11088677 1 67.0 1 1 71. 1 67.3 dBA 11:00 1100 70.5 11296187 112961874 35721681 12:00 1200 65.5 3586013 35860132 11339969 Leq 24-Hour Pm 1:00 1300 65.7 3716230 37162300 11751751 1 64.9 JdBA 2:00 1400 69.2 8309957 83099575 26278393 3:00 1500 66.8 4739693 47396926 14988224 Ldn: 10 dB adjustment between 10:00 p.m. &7:00 a.m. 4:00 1600 67.0 4978597 49785970 15743706 66.9 dBA 5:00 1700 67.1 5104251 51042515 16141060 6:00 1800 66.6 4531425 45314251 14329624 CNEL: 5 dB adjustment between 7:00p.m. &10:00 p.m.,&10 dB 7:00 1900 65.4 3475818 34758177 10991501 67.5 dBA adjustment between 10:00 p.m. &7:00 a.m. 8:00 2000 64.2 2639660 26396599 8347338 9:00 2100 62.9 1927799 19277992 6096236 10:00 2200 58.2 656471 6564712 2075944 Difference between CNEL and Ldn pm 11:00 2300 56.0 399578 3995777 1263576 CNEL-Ldn 0.60095095 APPENDIX / SoundPLAN Output Sheets INOB Meridian 9 Contribution level - Operational Noise Source Source group Source type Ldn Leq,d Leq,e Leq,n dB(A) dB(A) dB(A) dB(A) Receiver Site 1 FI G Ldn 39.8 dB(A) Leq,d 34.9 dB(A) Leq,e 36.4 dB(A) Leq,n 32.3 dB(A) Drive Thru 1 Default industrial noise Line 25.2 20.3 21.8 17.7 Drive-Thru 2 Default industrial noise Line 25.4 20.4 21.9 17.8 Menu Board and Speaker Default industrial noise Point 18.9 14.0 15.5 11.4 Parking Lot Activity Default industrial noise Line 29.6 24.7 26.2 22.1 Table 1 Default industrial noise Point 28.8 23.8 25.3 21.2 Table 2 Default industrial noise Point 29.0 24.0 25.5 21.4 Table 3 Default industrial noise Point 27.9 23.0 24.5 20.4 Table 4 Default industrial noise Point 28.2 23.2 24.7 20.6 Table 5 Default industrial noise Point 28.7 23.7 25.2 21.1 Table 6 Default industrial noise Point 29.0 24.0 25.5 21.4 Table 7 Default industrial noise Point 29.0 24.1 25.6 21.5 Table 8 Default industrial noise Point 28.6 23.7 25.2 21.1 Table 9 Default industrial noise Point 28.6 23.7 25.2 21.1 Table 10 Default industrial noise Point 28.3 23.3 24.8 20.7 Table 11 Default industrial noise Point 28.3 23.3 24.8 20.7 Receiver Site 1 FI F2 Ldn 40.4 dB(A) Leq,d 35.5 dB(A) Leq,e 37.0 dB(A) Leq,n 32.9 dB(A) Drive Thru 1 Default industrial noise Line 25.4 20.4 21.9 17.8 Drive-Thru 2 Default industrial noise Line 25.4 20.5 22.0 17.9 Menu Board and Speaker Default industrial noise Point 19.7 14.7 16.2 12.1 Parking Lot Activity Default industrial noise Line 29.6 24.7 26.2 22.1 Table 1 Default industrial noise Point 29.3 24.4 25.9 21.8 Table 2 Default industrial noise Point 29.6 24.6 26.1 22.0 Table 3 Default industrial noise Point 28.6 23.7 25.2 21.1 Table 4 Default industrial noise Point 28.9 23.9 25.4 21.3 Table 5 Default industrial noise Point 29.4 24.5 26.0 21.9 Table 6 Default industrial noise Point 29.7 24.8 26.3 22.2 Table 7 Default industrial noise Point 29.8 24.8 26.3 22.2 Table 8 Default industrial noise Point 29.3 24.4 25.9 21.8 Table 9 Default industrial noise Point 29.4 24.5 26.0 21.8 Table 10 Default industrial noise Point 29.0 24.1 25.6 21.5 Table 11 Default industrial noise Point 29.0 24.0 25.5 21.4 Receiver Site 2 FI G Ldn 42.8 dB(A) Leq,d 37.9 dB(A) Leq,e 39.4 dB(A) Leq,n 35.3 dB(A) Drive Thru 1 Default industrial noise Line 24.1 19.1 20.6 16.5 Drive-Thru 2 Default industrial noise Line 21.2 16.3 17.8 13.7 Menu Board and Speaker Default industrial noise Point 18.4 13.5 15.0 10.9 Parking Lot Activity Default industrial noise Line 33.0 28.1 29.6 25.5 Table 1 Default industrial noise Point 32.7 27.8 29.3 25.2 Table 2 Default industrial noise Point 32.9 28.0 29.5 25.4 Table 3 Default industrial noise Point 33.7 28.7 30.2 26.1 Table 4 Default industrial noise Point 31.3 26.4 27.9 23.8 Table 5 Default industrial noise Point 31.5 26.5 28.0 23.9 Table 6 Default industrial noise Point 31.7 26.7 28.2 24.1 Table 7 Default industrial noise Point 31.4 26.5 28.0 23.9 Meridian Consultants LLC 860 Hampshire Road, Suite P Westlake Village CA 91361 1 SoundPLAN 9.1 INOB Meridian 9 Contribution level - Operational Noise Source Source group Source type Ldn Leq,d Leq,e Leq,n dB(A) dB(A) dB(A) dB(A) Table 8 Default industrial noise Point 30.8 25.8 27.3 23.2 Table 9 Default industrial noise Point 31.1 26.2 27.7 23.6 Table 10 Default industrial noise Point 30.8 25.9 27.4 23.3 Table 11 Default industrial noise Point 30.5 25.6 27.1 23.0 Receiver Site 2 FI F2 Ldn 43.7 dB(A) Leq,d 38.7 dB(A) Leq,e 40.2 dB(A) Leq,n 36.1 dB(A) Drive Thru 1 Default industrial noise Line 24.1 19.2 20.7 16.6 Drive-Thru 2 Default industrial noise Line 21.3 16.4 17.9 13.8 Menu Board and Speaker Default industrial noise Point 19.1 14.2 15.7 11.6 Parking Lot Activity Default industrial noise Line 33.0 28.1 29.6 25.5 Table 1 Default industrial noise Point 33.6 28.7 30.2 26.1 Table 2 Default industrial noise Point 33.8 28.9 30.4 26.3 Table 3 Default industrial noise Point 34.7 29.7 31.2 27.1 Table 4 Default industrial noise Point 32.3 27.4 28.9 24.8 Table 5 Default industrial noise Point 32.5 27.6 29.1 25.0 Table 6 Default industrial noise Point 32.7 27.8 29.3 25.2 Table 7 Default industrial noise Point 32.4 27.5 29.0 24.9 Table 8 Default industrial noise Point 31.7 26.8 28.3 24.2 Table 9 Default industrial noise Point 32.1 27.2 28.7 24.6 Table 10 Default industrial noise Point 31.8 26.8 28.3 24.2 Table 11 Default industrial noise Point 31.4 26.5 28.0 23.9 Receiver Site 3: West Lost Rapids Drive 3150 FI G Ldn 38.8 dB(A) Leq,d 33.8 dB(A) Leq,e 35.3 dB(A) Leq,n 31.2 1 Drive Thru 1 Default industrial noise Line 24.1 19.1 20.6 16.5 Drive-Thru 2 Default industrial noise Line 20.2 15.3 16.7 12.6 Menu Board and Speaker Default industrial noise Point 20.9 16.0 17.5 13.4 Parking Lot Activity Default industrial noise Line 24.0 19.0 20.5 16.4 Table 1 Default industrial noise Point 6.2 1.2 2.7 -1.4 Table 2 Default industrial noise Point 6.3 1.4 2.9 -1.2 Table 3 Default industrial noise Point 26.6 21.6 23.1 19.0 Table 4 Default industrial noise Point 26.7 21.8 23.3 19.2 Table 5 Default industrial noise Point 29.3 24.3 25.8 21.7 Table 6 Default industrial noise Point 29.2 24.2 25.7 21.6 Table 7 Default industrial noise Point 29.3 24.4 25.9 21.8 Table 8 Default industrial noise Point 27.6 22.7 24.2 20.1 Table 9 Default industrial noise Point 29.4 24.5 26.0 21.9 Table 10 Default industrial noise Point 29.6 24.6 26.1 22.0 Table 11 Default industrial noise Point 29.8 24.8 26.3 22.2 Receiver Site 4: North Ten Mile Road 6040 FI G Ldn 36.6 dB(A) Leq,d 31.7 dB(A) Leq,e 33.2 dB(A) Leq,n 29.1 dB( Drive Thru 1 Default industrial noise Line 25.1 20.1 21.6 17.5 Drive-Thru 2 Default industrial noise Line 15.8 10.9 12.4 8.3 Menu Board and Speaker Default industrial noise Point 17.2 12.3 13.8 9.7 Parking Lot Activity Default industrial noise Line 22.0 17.0 18.5 14.4 Table 1 Default industrial noise Point 11.6 6.6 8.1 4.0 Table 2 Default industrial noise Point 9.6 4.7 6.2 2.1 Table 3 Default industrial noise Point 9.6 4.6 6.1 2.0 Meridian Consultants LLC 860 Hampshire Road, Suite P Westlake Village CA 91361 2 SoundPLAN 9.1 INOB Meridian 9 Contribution level - Operational Noise Source Source group Source type Ldn Leq,d Leq,e Leq,n dB(A) dB(A) dB(A) dB(A) Table 4 Default industrial noise Point 11.9 7.0 8.4 4.3 Table 5 Default industrial noise Point 23.0 18.0 19.5 15.4 Table 6 Default industrial noise Point 27.6 22.7 24.2 20.1 Table 7 Default industrial noise Point 27.7 22.7 24.2 20.1 Table 8 Default industrial noise Point 28.0 23.1 24.6 20.5 Table 9 Default industrial noise Point 27.9 23.0 24.5 20.4 Table 10 Default industrial noise Point 28.3 23.3 24.8 20.7 Table 11 Default industrial noise Point 28.4 23.4 24.9 20.8 Receiver Site 5: North Fairborn Avenue 5872 FI G Ldn 33.8 dB(A) Leq,d 28.9 dB(A) Leq,e 30.4 dB(A) Leq,n 26.3 d Drive Thru 1 Default industrial noise Line 18.6 13.7 15.2 11.1 Drive-Thru 2 Default industrial noise Line 17.4 12.4 13.9 9.8 Menu Board and Speaker Default industrial noise Point 13.7 8.8 10.3 6.2 Parking Lot Activity Default industrial noise Line 21.3 16.4 17.9 13.8 Table 1 Default industrial noise Point 23.6 18.7 20.2 16.1 Table 2 Default industrial noise Point 23.8 18.8 20.3 16.2 Table 3 Default industrial noise Point 22.2 17.3 18.8 14.7 Table 4 Default industrial noise Point 22.3 17.4 18.9 14.8 Table 5 Default industrial noise Point 22.7 17.7 19.2 15.1 Table 6 Default industrial noise Point 22.8 17.9 19.4 15.3 Table 7 Default industrial noise Point 22.9 17.9 19.4 15.3 Table 8 Default industrial noise Point 22.7 17.8 19.3 15.2 Table 9 Default industrial noise Point 22.7 17.8 19.3 15.2 Table 10 Default industrial noise Point 22.5 17.6 19.1 15.0 Table 11 Default industrial noise Point 22.6 17.6 19.1 15.0 Receiver Site 6: The Church of Jesus Christ of Latter-day Saints FI G Ldn 33.9 dB(A) Leq,d 29.0 dB(A) Leq,e 30.5 d Drive Thru 1 Default industrial noise Line 19.4 14.5 16.0 11.9 Drive-Thru 2 Default industrial noise Line 18.0 13.1 14.6 10.5 Menu Board and Speaker Default industrial noise Point 14.9 10.0 11.5 7.4 Parking Lot Activity Default industrial noise Line 21.1 16.2 17.7 13.6 Table 1 Default industrial noise Point 22.3 17.4 18.9 14.8 Table 2 Default industrial noise Point 21.0 16.0 17.5 13.4 Table 3 Default industrial noise Point 23.6 18.7 20.2 16.1 Table 4 Default industrial noise Point 23.8 18.8 20.3 16.2 Table 5 Default industrial noise Point 22.5 17.6 19.1 14.9 Table 6 Default industrial noise Point 22.6 17.7 19.2 15.1 Table 7 Default industrial noise Point 22.8 17.8 19.3 15.2 Table 8 Default industrial noise Point 22.8 17.8 19.3 15.2 Table 9 Default industrial noise Point 22.6 17.7 19.2 15.1 Table 10 Default industrial noise Point 22.5 17.6 19.0 14.9 Table 11 Default industrial noise Point 24.8 19.8 21.3 17.2 Meridian Consultants LLC 860 Hampshire Road, Suite P Westlake Village CA 91361 3 SoundPLAN 9.1 INOB Meridian 9 Contribution level - Truck Deliveries Source Source group Source type Ldn Leq,d Leq,e Leq,n dB(A) dB(A) dB(A) dB(A) Receiver Site 1 FI G Ldn 43.0 dB(A) Leq,d 31.8 dB(A) Leq,e dB(A) Leq,n 37.1 dB(A) Truck Delivery Default industrial noise ILine 1 43.01 31.8 1 1 37.1 Receiver Site 1 FI F2 Ldn 42.5 dB(A) Leq,d 31.3 dB(A) Leq,e dB(A) Leq,n 36.6 dB(A) Truck Delivery Default industrial noise ILine 1 42.5 1 31.3 1 36.6 Receiver Site 2 FI G Ldn 43.0 dB(A) Leq,d 31.8 dB(A) Leq,e dB(A) Leq,n 37.0 dB(A) Truck Delivery Default industrial noise ILine 1 43.0 1 31.8 1 1 37.0 Receiver Site 2 FI F2 Ldn 42.5 dB(A) Leq,d 31.3 dB(A) Leq,e dB(A) Leq,n 36.6 dB(A) Truck Delivery Default industrial noise Line 42.5 31.3 36.6 Receiver Site 3: West Lost Rapids Drive 3150 FI G Ldn 27.2 dB(A) Leq,d 16.1 dB(A) Leq,e dB(A) Leq,n 21.3 dB(A Truck Delivery I Default industrial noise ILine 1 27.2 1 16.1 1 1 21.3 Receiver Site 4: North Ten Mile Road 6040 FI G Ldn 24.6 dB(A) Leq,d 13.5 dB(A) Leq,e dB(A) Leq,n 18.7 dB(A) Truck Delivery I Default industrial noise ILine 1 24.6 1 13.5 1 1 18.7 Receiver Site 5: North Fairborn Avenue 5872 FI G Ldn 27.2 dB(A) Leq,d 16.1 dB(A) Leq,e dB(A) Leq,n 21.3 dB(A) Truck Delivery I Default industrial noise ILine 1 27.2 1 16.1 1 1 21.3 Receiver Site 6: The Church of Jesus Christ of Latter-day Saints FI G Ldn 26.2 dB(A) Leq,d 15.0 dB(A) Leq,e dB(A; Truck Delivery I Default industrial noise ILine 1 26.2 1 15.0 1 1 20.2 Meridian Consultants LLC 860 Hampshire Road, Suite P Westlake Village CA 91361 1 SoundPLAN 9.1