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HomeMy WebLinkAboutSDP 12-02; Dhiman Goddard School; Site Development Plan (SDP) (2) AEROSPACE / FORENSIC ENGINEERING – ACOUSTICS – VIBRATION – MATERIALS SCIENCE EXPERT WITNESS – AIR QUALITY – ENVIRONMENTAL COMPLIANCE ACOUSTICAL SITE ASSESSMENT GODDARD PRESCHOOL SITE DEVELOPMENT CARLSBAD, CA Submitted to: Mr. Scott Cairns AIA Smith Consulting Architects 12220 El Camino Real, Suite 200 San Diego, CA 92130 Investigative Science and Engineering, Inc. Scientific, Environmental, and Forensic Consultants P.O. Box 488 / 1134 D Street Ramona, CA 92065 (760) 787-0016 www.ise.us ISE Project #12-003 April 18, 2012 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… REPORT CONTENTS INTRODUCTION AND DEFINITIONS 1 Existing Site Characterization 1 Project Description 1 Acoustical Definitions and Theory 1 ENVIRONMENTAL SIGNIFICANCE THRESHOLDS 8 City of Carlsbad Noise Regulations 8 State of California CCR Title 24 9 ANALYTICAL APPROACH AND METHODOLOGY 9 Existing Conditions Survey 9 Traffic Noise Impact Assessment Approach 12 FINDINGS AND RECOMMENDATIONS 14 Ambient Sound Measurement Results 14 Future Traffic Noise Impacts 14 CERTIFICATION OF ACCURACY AND QUALIFICATIONS 16 APPENDICES / SUPPLEMENTAL INFORMATION 17 APP 1 – Quest SP DL/2 Post-Processed Output Data (Monitoring Station ML 1) 17 APP 2 – SANDAG Series 11 Traffic Forecast Data (Scenario Year 2030) 20 APP 3 – TNM Model Input/Output Data 21 INDEX OF IMPORTANT TERMS 28 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… LIST OF TABLES TABLE 1: MEASURED AMBIENT SOUND LEVELS 14 TABLE 2: PREDICTED TRANSPORTATION NOISE LEVELS 15 LIST OF FIGURES / MAPS / ADDENDA FIGURE 1: PROJECT STUDY AREA VICINITY MAP 2 FIGURE 2A: AERIAL IMAGE SHOWING PROPOSED GODDARD SCHOOL 3 FIGURE 2B: PROJECT SITE PANORAMIC PHOTOGRAPH 4 FIGURE 2C: PROJECT SITE PANORAMIC PHOTOGRAPH 4 FIGURE 3: PROPOSED GODDARD SCHOOL FOOTPRINT 5 FIGURE 4A: AMBIENT NOISE MONITORING LOCATION ML 1 10 FIGURE 4B: AMBIENT MONITORING LOCATION PHOTOS 11 FIGURE 5: MODELED RECEPTOR LOCATIONS WITHIN PROJECT SITE 13 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… INTRODUCTION AND DEFINITIONS Existing Site Characterization The proposed Goddard School development site consists of approximately 1.05 commercially zoned acres, located in the Calavera Hills Village “Y” area of Carlsbad, CA as shown in Figure 1 on the following page. Regional access to the site is obtained from College Boulevard via State Route 78 (SR 78). The site is located on the southwest corner of College Boulevard and Red Bluff Place. Surrounding uses are entirely residential in nature. The Goddard School site is a fully disturbed land use having a mean elevation of approximately 315 feet above mean sea level (MSL) as shown by the red bounded area in Figure 2a on Page 3 of this report. Panoramic photographs of the site, taken from approximate south and east vantage points, are shown in Figures 2b and -c on Page 4 of this report. Project Description The Goddard School project would consist of a single 8,570 square-foot preschool building with appropriate playground uses, parking areas and landscaping. The proposed footprint of the project is shown in Figure 3 on Page 5 of this report. A six- foot-high masonry wall is proposed as part of the project design, and would extend along the length of the project frontage with College Boulevard, at the top of the project pad slope. Acoustical Definitions and Theory Sound waves are linear mechanical waves. They can be propagated in solids, liquids, and gases. The material transmitting such a wave oscillates in the direction of propagation of the wave itself. Sound waves originate from some sort of vibrating surface. Whether this surface is the vibrating string of a violin or a person's vocal cords, a vibrating column of air from an organ or clarinet, or a vibrating panel from a loudspeaker, drum, or aircraft, the sound waves generated are all similar. All of these vibrating elements alternatively compress the surrounding air on a forward movement, and expand it on a backward movement. There is a large range of frequencies within which linear waves can be generated, sound waves being confined to the frequency range that can stimulate the auditory organs to the sensation of hearing. For humans, this range is from about 20 Hertz (Hz or cycles per second) to about 20,000 Hz. The air transmits these frequency disturbances outward from the source of the wave. Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 2 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… FIGURE 1: Project Study Area Vicinity Map (ISE 4/12) Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 3 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… FIGURE 2a: Aerial Image Showing Proposed Goddard School Development Area (ISE 4/12) Acoustical Site Assessment Goddard Preschool Site Development -Carlsbad, CA ISE Report #12-003 April18, 2012 Page4 FIGURE 2b: Project Site Panoramic Photograph-View Looking Northeast (ISE 4/12) FIGURE 2c: Project Site Panoramic Photograph-View Looking Northwest (ISE 4/12) © 2012/nvestigative Science and Engineering, Inc. The leader in Scientific Consulting and Research ... Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 5 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… FIGURE 3: Proposed Goddard School Footprint within Development Area (ISE 4/12) Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 6 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Sound waves, if unimpeded, will spread out in all directions from a source. Upon entering the auditory organs, these waves produce the sensation of sound. Waveforms that are approximately periodic, or consist of a small number of periodic components, can give rise to a pleasant sensation (assuming the intensity is not too high), for example, as in a musical composition. Noise, on the other hand, can be represented as a superposition of periodic waves with a large number of components, and is generally defined as unwanted or annoying sound that is typically associated with human activity, and which interferes with or disrupts normal activities. Although exposure to high noise levels has been demonstrated to cause hearing loss, the principal human response to environmental noise is annoyance. The response of individuals to similar noise events is diverse and influenced by the type of noise, the perceived importance of the noise and its appropriateness in the setting, the time of day, and the sensitivity of the individual hearing the sound. Airborne sound is a rapid fluctuation of air pressure, above and below atmospheric levels. The loudest sounds that the human ear can hear comfortably are approximately one trillion (or 1x1012) times the acoustic energy that the ear can barely detect. Because of this vast range, any attempt to represent the acoustic intensity of a particular sound on a linear scale becomes unwieldy. As a result, a logarithmic ratio, originally conceived for radio work, known as the decibel (dB), is commonly employed.1 A sound level of zero “0” dB is scaled such that it is defined as the threshold of human hearing, and would be barely audible to a human of normal hearing under extremely quiet listening conditions. Sound levels above 120 dB roughly correspond to the threshold of pain. The minimum change in sound level that the human ear can detect is approximately 3.0 dBA.2 A change in sound level of 10 dB is usually perceived by the average person as a doubling (or halving) of the sound’s loudness.3 A change in sound level of 10 dB actually represents an approximate 90 percent change in the sound intensity, but only about a 50 percent change in the perceived loudness. This is due to the nonlinear response of the human ear to sound. 1 A unit used to express the relative magnitude of a sound wave. This level is defined as being equal to 20 times the common logarithm of the ratio of the pressure produced by a sound wave of interest, to a ‘reference’ pressure wave equal to 20 micro Pascal’s (µPa) measured at a distance of 1 meter. 20 µPa is the smallest amount of pressure capable of producing the sensation of hearing in a human. 2 Every 3 dB equates to a 50% drop (or increase) in wave strength; therefore a 6 dB drop/increase = a loss/increase of 75% of total signal strength and so on. 3 This is a subjective reference based upon the nonlinear nature of the human ear. Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 7 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… As mentioned above, most of the sounds we hear in the environment do not consist of a single frequency, but rather a broad band of frequencies differing in sound level. The intensities of each frequency add to generate the sound we hear. The method commonly used to quantify environmental sounds, consists of determining all of the frequencies of a sound according to a weighting system that reflects the nonlinear response characteristics of the human ear. This is called "A" weighting, and the decibel level measured is called the A-weighted sound level (or dBA). In practice, the level of a noise source is conveniently measured using a sound level meter that includes a filter corresponding to the dBA curve.4 Although the A-weighted sound level may adequately indicate the level of environmental noise at any instant in time, community noise levels vary continuously. Most environmental noise includes a conglomeration of sounds from distant sources that create a relatively steady background noise in which no particular source is identifiable. For this type of noise, a single descriptor called the Leq (or equivalent sound level) is used. Leq is the energy-mean A-weighted sound level during a measured time interval, and would be defined mathematically by the following continuous integral, Leq =10Log10 1 T SPL(t)2 dt 0 T!" #$% &' where, Leq is the energy equivalent sound level, t is the independent variable of time, T is the total time interval of the event, and, SPL is the sound pressure level re. 20 µPa. Thus, Leq is the ‘equivalent’ constant sound level that would have to be produced by a given source to equal the average of the fluctuating level measured. For most acoustical studies, the study interval is generally taken as one-hour and is abbreviated Leq-h or Leq(h); however, other time intervals are utilized depending on the jurisdictional preference. 4 In some cases, it is important to measure the distribution of sound pressure as a function of frequency. Under these circumstances, the incoming sound wave is passed through a series of band pass filters having predefined frequencies where they are resonant. The relative response of each filter (in dB, dBA, etc.) directly corresponds to the amount of sound energy present at that particular frequency. In standard acoustics two unique filter sets are used to accomplish this task, namely the 1/1 octave band and 1/3 octave band set. An octave is defined as the interval between any two frequencies having a ratio of 2 to 1. By definition, a whole octave filter (1/1) is a band-pass filter having a bandwid h equal to 70.7-percent of its center frequency (i.e., the frequency of interest) distributed across 11 bands between 11 Hz and 22,700 Hz (the effective audio frequency range). A 1/3 Octave Band filter has a bandwidth equal to 23.1% of its center frequency, distributed across 32 bands between 14.1 Hz and 22,390 Hz. Thus, the octave band frequencies would be 16, 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000 and 16000 Hz. The corresponding 1/3 octave band frequencies would be 16, 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000 and 20000 Hz. Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 8 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… To describe the time-varying character of environmental noise, the statistical noise descriptors L10, L50, and L90 are commonly used. They are the noise levels equaled or exceeded during 10 percent, 50 percent, and 90 percent of a stated time.5 The aggregate of all community noise events are typically averaged into a single value known as the Community Noise Equivalent Level (CNEL). This descriptor is calculated by averaging all events over a specified time interval and applying a 5-dBA penalty to any sounds occurring between 7:00 p.m. and 10:00 p.m., and a 10-dBA penalty to sounds that occur during nighttime hours (i.e., 10 p.m. to 7 a.m.). This penalty is applied to compensate for the increased sensitivity to noise during the quieter nighttime hours. Mathematically, CNEL can be derived based upon the hourly Leq values, via the following expression: where, Leq(x)i is the equivalent sound level during period ‘x’ at time interval ‘i’ and ‘n’ is the number of time intervals. Treating each time interval separately yields the following alternate expression for CNEL based upon each discrete time period: ENVIRONMENTAL SIGNIFICANCE THRESHOLDS City of Carlsbad Noise Regulations The Noise Element of the City of Carlsbad identifies traffic noise sound levels that are compatible with various land uses. According to the City of Carlsbad Draft Noise Guidelines Manual, sound levels up to 60 dBA CNEL are compatible with single-family residential land uses. Sound levels up to 65 dBA CNEL are compatible with daytime recreational uses such as parks and playgrounds as well as with proposed daycare uses. 5 Sound levels associated with the L10 typically describe transient or short-term events, while levels associated with the L90 describe the steady state (or most prevalent) noise conditions. The L50 level is the arithmetic average of the measured sound interval. In addition, it is often desirable to know the acoustic range of the noise source being measured. This is accomplished through the maximum and minimum measured sound level (Lmax and Lmin) indicators. The Lmin value obtained for a particular monitoring location is often called the acoustic floor for that location. CNEL =10Log10 1 n 10 Leq(day)i 10 +10 Leq(evening+5)i 10 +10 Leq(night+10)i 10 ! "# $ %& i=1 n' CNEL =10Log10 1 p +q +r 10 Leq(day)p 10 ! "# $ %& i=1 p'+10 Leq(evening+5)q 10 ! "# $ %& i=1 q'+10 Leq(night+10)r 10! "#$ %& i=1 r'( ) ** + , -- Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 9 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Further, the City’s Noise Guidelines Manual addresses procedures to implement policies outlined in the Noise Element. Within this manual it states that noise issues that will not be addressed include loud gatherings or general nuisance noise, which preschool playground noise would fall under. Therefore, onsite noise generation caused by children playing at the proposed Goddard School site will not be addressed in this report. State of California CCR Title 24 The California Code of Regulations (CCR), Title 24, Noise Insulation Standards, states that multi-family dwellings, hotels, and motels located where the CNEL exceeds 60 dBA, must obtain an acoustical analysis showing that the proposed design will limit interior noise to less than 45 dBA CNEL. A standard of 50 dBA CNEL is typically applied to school and office uses such as the proposed project. Interior noise standards are typically applied to sensitive areas within the structure, where low noise levels are desirable. Worst-case noise levels, either existing or future, must be used for this determination. Future noise levels must be predicted at least ten years from the time of building permit application. The City of Carlsbad has adopted the CCR Title 24 standards. ANALYTICAL APPROACH AND METHODOLOGY Existing Conditions Survey A single monitoring location was selected on the project site near the corner of College Boulevard and Red Bluff Place to determine the ambient community noise conditions. This location, denoted as Monitoring Location ML 1, is shown in Figure 4a on the following page. Photos of the test setup are shown in Figure 4b on Page 11 of this report. Onsite monitoring was performed on April 5, 2012, between 11:45 a.m. and 1:15 p.m., under normal daytime traffic conditions. For the field monitoring effort, a Quest SoundPro SP-DL-2 ANSI Type 2 integrating sound level meter was used as the data collection device. The meter was affixed to a tripod five-feet above ground level, in order to simulate the noise exposure of an average-height human being. All equipment was calibrated prior to testing.6 6 All equipment calibration is performed at ISE’s Acoustics and Vibration Laboratory using LORAN-C and Rubidium atomic time standards traceable to National Institute of Standards & Technology (NIST) to verify conformance with ANSI S1-4 1983 Type 2 and IEC 651 Type 2 standards. The ime and frequency calibration signal has a long-term stability of 10-10. Specificaions for traceability can be obtained at www.nist.gov. ................................... ·---................. ... ,-........ _____ ... __ ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' Acoustical Site Assessment Goddard Preschool Site Development -Carlsbad, CA ISE Report #12-003 April18, 2012 Page 10 ' ' \ ...... . '"'· .... •, ? ' \ FIGURE 4a: Ambient Noise Monitoring location Ml1 (ISE 4/12) © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research .. Acoustical Site Assessment Goddard Preschool Site Development -Carlsbad, CA ISE Report #12-003 April18, 2012 Page 11 FIGURE 4b: Ambient Monitoring Location Photos (ISE 4/12) © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research ... Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 12 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Traffic Noise Impact Assessment Approach The Traffic Noise Model version 2.5 (TNM 2.5) based on FHWA-PD-96-010 and FHWA/CA/TL-87/03 standards was used to calculate future onsite vehicular traffic noise levels.7 Currently, TNM 2.5 is the only noise-modeling program formally accepted for use within the State of California. Input to the acoustical model included the following: o The proposed site development plan (Source: Smith Consulting Architects, 3/11) o A digitized representation of all major roadways affecting the project site under the worst-case future noise condition (i.e., College Boulevard). o Future Average Daily Trips (ADT’s) for College Boulevard (Source: SANDAG Series 11 Year 2030 Traffic Projection). o A traffic mix of 88.4% LDA/LDT, 6.4% MDT, 4.7% HDT, and 0.5% MCY in accordance with the Caltrans ITS Transportation Protocols (Source: Caltrans Traffic Data Branch, 3/09). 8 o A peak hour traffic percentage of 10% of the ADT.9 o Receptor and topographic elevations (Source: USGS Digital Elevation Model). o A composite pavement type, consisting of an average of Portland Cement Concrete (PCC) and Dense-Graded Asphaltic Concrete (DGAC) in accordance with TNM 2.5 test results (1998). Modeled receptor elevations (defined as CALC # points) were considered five feet above the appropriate floor (pad) elevation and were taken within, (1) the westerly playground area, (2) the northwesterly building façade adjacent to Red Bluff Place, (3) the play area near the corner of College Boulevard and Red Bluff Place, (4) the easterly building façade along College Boulevard, and, (5) the southern designated play area. Measurement points (2) and (4) were selected to determine future noise exposure levels per CCR Title 24. The modeled receptor locations can be seen in Figure 5 on the following page. 7 The components of the TNM model are supported by a scientifically founded and experimentally calibrated acoustic computation methodology. The database is made up of over 6,000 individual pass-by events measured at forty sites across the country. 8 The Caltrans vehicle classifications are as follows: LDA = Light Duty Automobile, LDT = Light Duty Truck, MDT = Medium Duty Truck, HDT = Heavy Duty Truck, and MCY = Motorcycle. 9 For values between approximately 8 and 12 percent, he energy-mean A-weighted sound level is equivalent to the CNEL. Outside this range, a maximum variance of up to two dBA occurs between Leq-h and CNEL Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 13 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… FIGURE 5: Modeled Receptor Locations within Project Site (ISE 4/12) ~ FINDINGS ANI:> RECOMMENDATIONS Ambient Sound Measurement Results Acoustical Site Assessment Goddard Preschool Site Development -Carlsbad, CA ISE Report #12-003 April18, 2012 Page 14 The results of the ambient sound level monitoring are shown in Table 1, below, with the field data record provided as an attachment to this report. The values for the equivalent sound level (Leq.11), the maximum and minimum measured sound levels (Lmax and Lmin), and the statistical indicators L10, L50, and L90, are given for the monitoring location examined. TABLE 1: Measured Ambient Sound Levels-Goddard School Site 1-Hour Noise Level Descriptors in dBA Monitoring Location Start Time L.o ML 1 1145 a.m. 63.9 77.7 45.0 67.9 59.9 49.2 Monitoring Location: Location 1: Near Comer of College Boulevard and Red Bluff Place. GPS: N 33 deg, 09.834' W 117 deg, 17.637', EPE 13ft, Temp 76.6 •F, RH 36% Measurements performed by ISE on 4/5/12. EPE =Estimated Position Error. Measurements collected reflect the ambient daytime community sound levels in the vicinity of the proposed project site. As can be seen , the hourly average sound level (or Leq.tJ) recorded over the monitoring period was found to be 63.9 dBA and was observed to be entirely due to intermittent traffic activity along College Boulevard. Statistically, the sound varied between 49 to 68 dBA. These levels were found to be consistent with the City's general plan compatibility standards for the proposed land use application. Future Traffic Noise Impacts The predicted future year 2030 traffic volume along College Boulevard adjacent to the project site is expected to be 34 ,000 ADT, respectively, at a future speed as high as 40 MPH. The SANDAG traffic prediction sheet is provided as an attachment to this report. The results of the TNM acoustical modeling within the proposed development are summarized in Table 2 on the following page and provided as an attachment. The tabular output shows the unmitigated usable exterior sound levels (CALC's 1, 3, and 5) subject to the City's General Plan Noise Element as well as the fa~ade sound levels (CALC's 2 and 4) subject to CCR Title 24 interior noise requirements. © 2012/nvestigative Science and Engineering, Inc. The leader in Scientific Consulting and Research ... Acoustical Site Assessment Goddard Preschool Site Development -Carlsbad, CA ISE Report #12-003 April18, 2012 Page 15 TABLE 2: Predicted Transportation Noise Levels -Goddard School Development Plan Receptor 10 CALC 1 CALC2 CALC3 CALC 4 CALC5 . . : ..................... ... --- Unmitigated Sound Level 61.2 63.2 62.0 60.7 61.3 . ! ... <> '...... .. .. \. ' .. . ' . \ . \ ,·· ' ' ..... CALC 3 ... ' ' ' , ...... "': ........ Exterior Mitigation ' ' ' ' Required? ' ' ' ' ' ' ' No No No No No -:+:CALC S CCR Title 24 Interior Mitigation Required? n/a Yes n/a Yes n/a ' ~ \ Based upon the findings, no exterior noise levels within sensitive usable space areas are identified which would exceed the City of Carlsbad General Plan Noise Element standards. No significant exterior acoustical impacts are identified. Future building fa9ade noise levels were found to minimally exceed the CCR Title 24 Noise Insulation threshold of 60 dBA CN EL. It is therefore recommended that the composite structural shell have a minimum sound attenuation (or sound transmission, STC) level of at least 20. This should be easily attainable through conventional construction practices and materials. No additional mitigation beyond this measure is identified. © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research ... Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 16 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… CERTIFICATION OF ACCURACY AND QUALIFICATIONS This report was prepared by Investigative Science and Engineering, Inc. (ISE), located at 1134 D Street, Ramona, CA 92065. The members of its professional staff contributing to the report are listed below: Rick Tavares Ph.D. Civil Engineering (rtavares@ise.us) M.S. Structural Engineering M.S. Mechanical Engineering B.S. Aerospace Engineering / Engineering Mechanics Karen Tavares B.S. Electrical Engineering (ktavares@ise.us) ISE affirms to the best of its knowledge and belief that the statements and information contained herein are in all respects true and correct as of the date of this report. Should the reader have any questions regarding the findings and conclusions presented in this report, please do not hesitate to contact ISE at (760) 787-0016. Content and information contained within this report is intended only for the subject project and is protected under 17 U.S.C. §§ 101 through 810. Original reports contain a non-photo blue ISE watermark at the bottom of each page. Approved as to Form and Content: Rick Tavares, Ph.D. Project Principal Investigative Science and Engineering, Inc. (ISE) Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 17 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… APPENDICES / SUPPLEMENTAL INFORMATION APP 1 – Quest SP DL/2 Post-Processed Output Data (Monitoring Station ML 1) Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 18 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 19 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 20 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… APP 2 – SANDAG Series 11 Traffic Forecast Data (Scenario Year 2030) Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 21 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… APP 3 – TNM Model Input/Output Data Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 22 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 23 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 24 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 25 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 26 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 27 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… Acoustical Site Assessment Goddard Preschool Site Development – Carlsbad, CA ISE Report #12-003 April 18, 2012 Page 28 © 2012 Investigative Science and Engineering, Inc. The leader in Scientific Consulting and Research… INDEX OF IMPORTANT TERMS acoustic floor, 8 A-weighted, 7 Caltrans ITS, 12 CCR Title 24, 15 City of Carlsbad, 2, 8, 9, 15 CNEL, 8, 9, 12, 15 College Boulevard, 1, 9, 12, 14 dB, 6, 7 dBA, 6, 7, 8, 14 decibel, 6, 7, 8 FHWA/CA/TL-87/03, 12 FHWA-PD-96-010, 12 Goddard School, 3, 1, 3, 5, 9, 14, 15 Hertz, 1 Hz, 1 ISE, 1, 2, 9, 11, 14, 16 L10, 8, 14 L50, 8, 14 L90, 8, 14 Leq, 7, 8, 14 Leq(h), 7 Leq-h, 7, 12 LORAN-C, 9 Noise, 6, 8, 10, 14 Quest SoundPro, 9 Red Bluff Place, 1, 9, 12, 14 SANDAG, 2, 12, 14, 20 SR-125, 12 TNM 2.5, 12