The URL can be used to link to this page

Home My WebLink AboutCT 00-16; POINSETTIA PROPERTIES PA 2, 3 & 4 - WATERS END; NOISE ANALYSIS; 2001-04-13NOISE ANALYSIS FOR THE POINSETTIA PROPERTY CITY OF CARLSBAD Report #01-80 April 13, 2001 Prepared for: John Laing Homes 895 Dove Street, Suite 110 Newport Beach, CA 92660 Prepared By: Fred Greve, P .E. Mike Holritz, INCE Mestre Greve Associates 280 Newport Center Drive, Suite 230 Newport Beach, CA 92660 Phone (949) 760-0891 FAX (949) 760-1928 SUMMARY NOISE ANALYSIS FOR THE POINSETTIA PROPERTY CITY OF CARLSBAD EXTERIOR NOISE MITIGATION Mestre Greve Associates Report #01-80 Page 2 of 17 A number of rear yard areas in the project will be exposed to noise levels greater than 60 CNEL, and therefore will require noise barriers to meet the City's 60 CNEL standard. The required noise barrier locations and heights are listed in Table S1 and Table S2, and are shown in Exhibit SL Table Sl REQUIRED FIRST FLOOR EXTERIOR LIVING AREA NOISE BARRIER HEIGHTS AND LOCATIONS ALONG THE SAN DIEGO NORTHERN RAILROAD LOT Lot155 Lot149 Lot 117 Lot 106 Lot 101 Lot 100 Lot 95 Lot94 Lot66 Lot65 Lot26 PAD ELEVATION 50.9 51.2 51.7 52.0 52.1 52.7 49.9 49.4 47.6 47.1 47.7 REQUIRED TOP-OF-WALL ELEVATION 58.9 59.2 60.2 60.5 60.6 60.2 56.4 56.4 55.1 55.6 56.2 Wall Height (ft) Above Berm 5.0 5.0 5.5 5.5 5.5 4.5 3.5 4.0 4.5 5.5 5.5 Barrier Height (ft) Above Pad 8.0 8.0 8.5 8.5 8.5 7.5 6.5 7.0 7.5 8.5 8.5 Grading plans show a small berm at the property line along the railroad. The noise barriers along the railroad shall be constructed at the top of this slope. Barrier heights along the railroad tracks are expressed in terms of the required top-of-wall elevations. These elevations can be achieved using natural topography, berms, or walls, or a combination thereof. The required top-of-wall elevations are shown at several locations along the railroad. The top-of-wall elevations shall progress in a linear manner between these specified points. TOW=58.9' TOW=59.2' TOW=59.2' TOW= 57.7' TOW=59.7' TOW=60.2' TOW=60.2' TOW=60.5' ~T -"0~,uw = 60.2' TOW=S TOW=56.4 TOW=S6.4' TOW=55.6' TOW=56.2' ER LOCATIONS BARRI REVE ASSOCIATES MESTREG PVT. ST. "N" -:=::::;:::::;::::::;:::::;,.._--.:::::;::::,:s=~ :,. ' ,.. ,. r;J "' • 1 8 183 1 :} 186 ... 1) -~ (I) .... r,{ • 17 --.-~.~,---_::---r, ·~ 171 ~ 213 208 (/) E :-"f t-:=2~14,-t~rt I ~ lffi ~~"1r~>l ct! 52 ~ rt 43 B (/) 7 .... LJ 41 t:J • 40 fS5 10 El 8 ~ .~ 1 16 PVT. ST; 11 25 24 3 2 21 1 ---- al "0 ... = Wall Ht= 3.0' ~ > ~ Wal1Ht=3.0' ·'--·-------. Needed .---~;-;;;-:_;;6~0•• • Barriers d wa11m-• • t Floor Noise . e Standar Ex I 60CNE x h.bit S1 -Firs LE terior No1s To Meet The Homes Requiring I I I I \ \ I I . ~ I I ' • • 1 Ventilation Mechamca REVE ASSOCIATES MESTREG ... 155 156 157 .., QI 160 161 1 ~ ~ "' 177 176 7 ~ 1 1 l .... 209 • t--:::-:;:::,-,-r':':20;;-""Ls., I • VJ 213 :--f .-r--:-;,.,-,=-,..1'1 I ' 214 1 15 t t 16 PVT. ST. 11 [ij~~" --- Poinsettia Lane • al Ventilation Exhibit S2 -MechamcRequirements Mestre Greve Associates Report #01-80 Page 3 of 17 The noise barrier along the railroad must have a surface density of at least 4.0 pounds per square foot, and shall have no openings or gaps. The noise barriers may be a wall, berm, or a combination of the two. The wall along the railroad may be constructed of 3/8" plate glass, 3/4" plexiglass, any masonry material, or a combination of these materials. Table S2 REQUIRED FIRST FLOOR EXTERIOR LIVING AREA NOISE BARRIER HEIGHTS AND LOCATIONS ALONG POINSETTIA LANE AND A VENIDA ENCINAS LOT BARRIER HEIGHT (FT) Along Poinsettia Lane Lots 18 through 22 Along A venida Encinas Lot 170 and Lot 171 Lots 191 through 201 Lots 1 through 18 @ -Denotes height above pad elevation t -Denotes height above top-of-slope 6.0@ 3.0t 3.0t 3.0t The noise barriers along Poinsettia Lane and along A venida Encinas must have a surface density of at least 3.5 pounds per square foot, and shall have no openings or gaps. These walls may be constructed of stud and stucco, 3/8" plate glass, 5/8" plexiglass, any masonry material, or a combination of these materials. All first floor exterior living areas in the project are projected to meet the 60 CNEL outdoor noise standard with the noise barriers listed above. The noise barrier heights are relative to top-of slope. Rear yards satisfy the City's requirement for providing mitigated exterior living areas. Therefore, the City is not requiring balconies to meet the exterior noise standard. Balcony barriers will not be required. INTERIOR NOISE LEVELS Mestre Greve Associates Report #01-80 Page 4 of 17 Building surfaces along A venida Encinas and along Poinsettia Lane will be exposed to noise levels of less than 65 CNEL, and therefore will require less than 20 dB noise reduction in order to meet the 45 CNEL interior noise standard. With construction practices common in California, residential buildings achieve outdoor-to indoor noise reductions of at least 20 dB. Therefore, all rooms along A venida Encinas and along Poinsettia Lane are projected to meet the City's 45 CNEL interior noise standard without building upgrades. Second floor building surfaces along the railroad will be exposed to noise levels about 67.4 CNEL, and therefore will require at least 22.4 dB noise reduction in order to meet the 45 CNEL interior noise standard. Based upon the construction details and the EWNR values, the exterior to interior noise reduction was calculated for a number of rooms in the project. The results of the analysis indicate that the worst case room will achieve an outdoor to indoor noise reduction of 22.8 dB. This exceeds the worst case required reduction of 22.4 dB. Therefore, all rooms are projected to meet the 45 CNEL interior noise standard without building upgrades. MECHANICAL VENTILATION Since the noise attenuation of a building falls to about 12 dB with windows open, all buildings exposed to noise levels greater than 57 CNEL will meet the 45 CNEL interior noise standard only with windows closed. In order to assume that windows can remain closed to achieve this required attenuation, adequate ventilation with windows closed must be provided per the applicable Uniform Building Code. This can be achieved with mechanical ventilation to provide fresh air. The fresh air inlet duct shall be of sound attenuating construction and shall consist of a minimum of ten feet of straight or curved duct, or six feet plus one sharp 90 degree bend. Mechanical ventilation will be required for those homes listed in Table S3 and shown in Exhibit S2. Air conditioning units may be an adequate substitute for mechanical ventilation as long as they meet the ventilation requirements specified in the Uniform Building Code. The acceptability of using air conditioners to meet the mechanical ventilation requirement varies by municipality. The local jurisdiction and the mechanical engineer for the project should be consulted. Table S3 MECHANICAL VENTILATION REQUIREMENTS BUILDING Along the San Diego Northern Railroad Home on Lot 26 Homes on Lots 65 and 66 Homes on Lots 94 through 98 Homes on Lots 100 and 101 Homes on Lots 106 and 107 Homes on Lots 116 and 117 Homes on Lots 132 and 133 Homes on Lots 148 and 149 Homes on Lots 154 and 155 Along Poinsettia Lane Homes on Lots 19 through 25 Along A venida Encinas Homes on Lots 170 and 171 Homes on Lots 191 through 201 Homes on Lots 1 through 18 Mestre Greve Associates Report #01-80 Page 5 of 17 1.0 INTRODUCTION NOISE ANALYSIS FOR THE POINSETTIA PROPERTY CITY OF CARLSBAD Mestre Greve Associates Report #01-80 Page 6 of 17 The purpose of this report is to demonstrate compliance of the "Poinsettia Property (Planning Areas 2, 3, and 4)" with the noise related 'Conditions of Approval' placed on the project by the City of Carlsbad. The project calls for the development of single-family homes. This report addresses the future noise levels at the project site, and incorporates the 60 CNEL exterior and 45 CNEL interior noise standards adopted by the City of Carlsbad. The project is located in the City of Carlsbad, as shown in Exhibit I. The project will be impacted by traffic noise from Poinsettia Lane and A venida Encinas. The project will also be impacted by railroad noise from the nearby San Diego Northern Railroad. (Due to distance and intervening projects, the San Diego Freeway is not projected to be a significant impact). This report determines any mitigation measures necessary for the project to meet the City's 60 CNEL exterior noise standard and the 45 CNEL interior noise standard. Grading and site plan information was obtained from the "Site Development Plan for the Poinsettia Property (Planning Areas 2, 3, & 4)" by Hunsaker & Associates, March 26, 2001. Building construction details were obtained from the architectural drawings for "Poinsettia" by Dahlin Group Architects, April 3, 2001. 2.0 CITY OF CARLSBAD NOISE STANDARDS The City of Carlsbad specifies outdoor and indoor noise limits for residential land uses. Both standards are based upon the CNEL index. CNEL (Community Noise Equivalent Level) is a 24- hour time weighted annual average noise level based on the A-weighted decibel. A-weighting is a frequency correction that correlates overall sound pressure levels with the frequency response of the human ear. Time weighting refers to the fact that noise occurring during certain noise sensitive time periods is given more significance because it occurs at these times. In the calculation of CNEL, noise that occurs during the evening time period (7 p.m. to IO p.m.) is weighted by 5 dB, while noise occurring in the nighttime period (10 p.m. to 7 a.m.) is weighted by IO dB. These time periods and weighting factors are used to reflect increased sensitivity to noise while sleeping, eating, and relaxing. The City of Carlsbad has adopted an exterior noise standard of 60 CNEL for a five foot tall observer. In addition, the City has decided upon an interior noise standard of 45 CNEL. RANaD ACIM l,£0l0'G4 21 22 Exhibit 1 -Vicinity Map MESTRE GREVE ASSOCIATES 3.0 METHODOLOGY Mestre Greve Associates Report #01-80 Page 7 of 17 The traffic noise levels projected in this report were computed using the Highway Noise Model published by the Federal Highway Administration ("FHW A Highway Traffic Noise Prediction Model", FHWA-RD-77-108, December 1978). The FHWA Model uses traffic volume, vehicle mix, vehicle speed, and roadway geometry to compute the "equivalent noise level". A computer code has been written which computes equivalent noise levels for each of the time periods used in CNEL. Weighting these noise levels and summing them results in the CNEL for the traffic projections used. Mitigation through the design and construction of a noise barrier (wall, berm, or combination wall/berm) is the most common way of alleviating traffic noise impacts. The effect of a noise barrier is critically dependent upon the geometry between the noise source, the barrier, and the observer. A noise barrier effect occurs when the "line of sight" between the noise source and the observer is broken by the barrier. As the path length that the sound travels around the barrier increases, the level of noise reduction increases. The FHW A model was also used here in computerized format to determine the required barrier heights. 4.0 NOISE EXPOSURE 4.1 Traffic Noise Exposure The traffic volumes for A venida Encinas and Poinsettia Lane were obtained from "The Poinsettia Properties Specific Plan Program EIR" by Coton/Beland/ Associates. The projected future average daily traffic volumes, vehicle speeds, and roadway grades used in the CNEL calculations are presented in Table 1. Traffic distribution which was used in the CNEL calculation is presented below in Table 2. Arterial traffic distribution estimates are based upon traffic surveys, and can be considered typical for arterials in Southern California. Table 1 TRAFFIC VOLUMES, SPEEDS, AND ROADWAY GRADES USED IN CNEL CALCULATIONS ROADWAY A venida Encinas Poinsettia Lane ADT 14,000 11,000 SPEED 35 40 GRADE <3% <3% Table2 TRAFFIC DISTRIBUTION PER TIME OF DAY IN PERCENT OF ADT VEHICLE TYPE DAY Automobile Medium Truck Heavy Truck 75.51 1.56 0.64 EVENING 12.57 0.09 0.02 NIGHT 9.34 0.19 0.08 Mestre Greve Associates Report #01-80 Page 8 of 17 Using the assumptions presented above, the future noise levels were computed. The results are listed in Table 3 in terms of distances to the 60, 65, and 70 CNEL contours. These represent the distances from the centerline of each roadway to the contour value shown. Data used in the CNEL calculations are included in the Appendix. Table 3 DISTANCE TO TRAFFIC NOISE CONTOURS FOR FUTURE TRAFFIC CONDITIONS ROADWAY Poinsettia Lane A venida Encinas DISTANCE TO CONTOUR (Ff) -70 CNEL--65 CNEL--60 CNEL- 26 24 56 53 120 113 The exterior living areas in the project must comply with the City's 60 CNEL exterior noise standard. The results in Table 3 and the site plan (Exhibit 2) indicate that rear yard observers along A venida Encinas would be exposed to a maximum unmitigated traffic noise level of about 64.0 CNEL. Rear yard observers along Poinsettia Lane would be exposed to a maximum unmitigated traffic noise level of about 62.0 CNEL. Mitigation measures to meet the 60 CNEL exterior noise standard are discussed in Section 5.0. REVE ASSOCIATES MESTREG I I I I ~ 147 1 "" 144 1 1 33 134 36 ,._ ~ ... ~ ~· . ,.. 115 ;::: I I 1[1:]~ \ \ \ I . i--! I I I Poinsettia Lane !II 177 176 !::; 1 1 190 " 1 a B "t> ~ V) 53 8 .... QI • Exhibit 2 -Site Plan ---- ~ j I~ --------·---------.. ----------=----------L--··-· -·····-l_ ~--__,f--ll- _.---------------__ ... -,,, ____ ,.. ---.. EN c IN As \ 64 ______ ---:::.--- ,,, __ ,,--_,-~ AVENIDA ------------~ IJ..I ~# ---·· -• -·· -• • --® L --------I I-------------------------~----® vuo1nnll u1aqpoN o~a\O uus ; ~ <( ~ ~ w (/) z 0 0.. ~ ~ r:n I < ("':\ ~ ~ $. ~ r.n ; u 0 r.n r.n < ~ i t., ~ ~ r"' r./) ~ ~ 4.2 Railroad Noise Exposure Mestre Greve Associates Report #01-80 Page 9 of 17 The San Diego Northern railroad line passes near the western boundary of the site. To determine train noise levels, the Wyle Model was used ("Assessment of Noise Environments Around Railroad Operations," Wyle Laboratories Report WCR-73-5, July, 1973). The noise generated by train operations can be divided into two components; noise generated by the engine or locomotive, and noise generated the railroad cars. The characteristic frequency of the engine is different than the characteristic frequency of the cars. The noise generated by the engine is the result of the mechanical movements of the engine parts, and to a lesser extent, the exhaust system. The noise generated by the cars is a result of the interaction between the wheels and the railroad track. A zero source height is used for the car noise, and a source height of 10 feet is utilized for the locomotive. Mitigation through the design and construction of a noise barrier (wall, berm, or combination wall/berm) is the most common way of alleviating traffic and railroad noise impacts. The effect of a noise barrier is critically dependent upon the geometry between the noise source, the barrier, and the observer. A noise barrier effect occurs when the "line of sight" between the noise source and the observer is broken by the barrier. As the path length that the sound travels around the barrier increases, the level of noise reduction increases. The Wyle Model was also used here in computerized format to determine barrier heights. The railroad line will be used for freight and passenger train operations. Projected future freight and commuter railroad operations were obtained from the "Noise Assessment of the NCTD Passing Track, City of Encinitas", Report #96-171 by Mestre Greve Associates, November 7, 1996. Updated Amtrak operations were confirmed with the schedule posted on the Internet. (The projected commuter operations were confirmed by Mr. Pete Aadland of NCTD on July 24, 2000). The projected future operational data presented in Table 4 was utilized in conjunction with the Wyle Model to project train noise levels on the project site. The train noise model used for Amtrak and commuter trains was calibrated in order to more closely match actual measured noise levels. Measured Amtrak and commuter train noise levels were approximately 10.1 dB lower than the model predicts. This may be due to continuously welded rails and/or quieter engines. Amtrak and commuter train noise levels were adjusted to reflect the 10.1 dB difference. Mestre Greve Associates Report #01-80 Page 10 of 17 The results of the train noise projections are displayed in Table 5 in terms of noise levels at distances of 100, 200, and 400 feet from the tracks. These projections do not include topography or barriers which may reduce the noise levels. Table 4 RAILROAD OPERATIONS MODELED OPERATION FREIGHT AMTRAK COMMUTER Day 3 11 16 Evening 1 1 2 Night 2 1 3 Number of Engines 2 1 1 Number of Cars 60 6 8 Speed 50 90 60 Table 5 RAILROAD NOISE LEVELS DISTANCE (FEET) 100 200 400 CNEL 68.9 65.0 59.3 The worst case proposed exterior living area is approximately 143 feet from the railroad tracks. At this location, if shielding is not present, the worst case noise level associated with train operations was estimated to be 67 .5 CNEL. Mitigation measures to meet the 60 CNEL exterior noise standard are discussed in Section 5.0. 5.0 EXTERIOR NOISE MITIGATION Mestre Greve Associates Report #01-80 Page 11 of 17 A number of rear yard areas in the project will be exposed to noise levels greater than 60 CNEL, and therefore will require noise barriers to meet the City's 60 CNEL standard. A number of cross sections (see Appendix for analysis data) were chosen and analyzed to determine the required barriers. The results of the analysis indicate that noise barriers are required along the San Diego Northern Railroad, along A venide Encinas, and along Poinsettia Lane. The required noise barrier locations and heights are listed in Table 6 and Table 7. and are shown in Exhibit 3. Table 6 REQUIRED FIRST FLOOR EXTERIOR LIVING AREA NOISE BARRIER HEIGHTS AND LOCATIONS ALONG THE SAN DIEGO NORTHERN RAILROAD LOT Lot155 Lot 149 Lot 117 Lot 106 Lot 101 Lot 100 Lot95 Lot94 Lot66 Lot65 Lot 26 PAD ELEVATION 50.9 51.2 51.7 52.0 52.1 52.7 49.9 49.4 47.6 47.1 47.7 REQUIRED TOP-OF-WALL ELEVATION 58.9 59.2 60.2 60.5 60.6 60.2 56.4 56.4 55.1 55.6 56.2 Wall Height (ft) Above Berm 5.0 5.0 5.5 5.5 5.5 4.5 3.5 4.0 4.5 5.5 5.5 Barrier Height (ft) Above Pad 8.0 8.0 8.5 8.5 8.5 7.5 6.5 7.0 7.5 8.5 8.5 Grading plans show a small berm at the property line along the railroad. The noise barriers along the railroad shall be constructed at the top of this slope. Barrier heights along the railroad tracks are expressed in terms of the required top-of-wall elevations. These elevations can be achieved using natural topography, berms, or walls, or a combination thereof. The required top-of-wall elevations are shown at several locations along the railroad. The top-of-wall elevations shall progress in a linear manner between these specified points. The noise barrier along the railroad must have a surface density of at least 4.0 pounds per square foot, and shall have no openings or gaps. The noise barriers may be a wall, berm, or a combination of the two. The wall along the railroad may be constructed of 3/8" plate glass, 3/4" plexiglass, any masonry material, or a combination of these materials. TOW=58.9' TOW=59.2' TOW=59.2' TOW=57.7' TOW=59.7' TOW=60.2' TOW=60.2' TOW=60.5' TOW=60.6' TOW=60.2' TOW=56. TOW=56.4' TOW=55.6' TOW=56.2' BARRIER LOCATIONS VE ASSOCIATES MESTREGRE .,, 177 176 !::; s Esll 1 PVT, ST. "M" tr 1 ~~"17=;:;Jl af 197 n. Wall Ht= 3.0' --- Table7 REQUIRED FIRST FLOOR EXTERIOR LIVING AREA NOISE BARRIER HEIGHTS AND LOCATIONS ALONG POINSETTIA LANE AND A VENIDA ENCINAS LOT BARRIER HEIGHT (Ff) Along Poinsettia Lane Lots 18 through 22 Along A venida Encinas Lot 170 and Lot 171 Lots 191 through 201 Lots 1 through 18 @ -Denotes height above pad elevation t -Denotes height above top-of-slope 6.0@ 3.0t 3.0t 3.0t Mestre Greve Associates Report #01-80 Page 12 of 17 The noise barriers along Poinsettia Lane and along A venida Encinas must have a surface density of at least 3.5 pounds per square foot, and shall have no openings or gaps. These walls may be constructed of stud and stucco, 3/8" plate glass, 5/8" plexiglass, any masonry material, or a combination of these materials. All first floor exterior living areas in the project are projected to meet the 60 CNEL outdoor noise standard with the noise barriers listed above. The noise barrier heights are relative to top-of slope. Rear yards satisfy the City's requirement for providing mitigated exterior living areas. Therefore, the City is not requiring balconies to meet the exterior noise standard. Balcony barriers will not be required. 6.0 INTERIOR NOISE LEVELS Mestre Greve Associates Report #01-80 Page 13 of 17 Building surfaces along Avenida Encinas and along Poinsettia Lane will be exposed to noise levels of less than 65 CNEL, and therefore will require less than 20 dB noise reduction in order to meet the 45 CNEL interior noise standard. With construction practices common in California, residential buildings achieve outdoor to indoor noise reductions of at least 20 dB. Therefore, all rooms along Avenida Encinas and along Poinsettia Lane are projected to meet the City's 45 CNEL interior noise standard without building upgrades. Second floor building surfaces along the railroad will be exposed to noise levels about 67.4 CNEL, and therefore will require at least 22.4 dB noise reduction in order to meet the 45 CNEL interior noise standard. Detailed engineering calculations are needed for building attenuation requirements greater than 20 dB. Construction details presented below were taken from the architectural drawings prepared for the project by Dahlin Group Architects. Roofs are attic space constructions and incorporate composition shingles on the exterior and gypsum drywall on the interior surface of the living area. Attic spaces are insulated with fiberglass insulation, and roofs are sloped. This roof/ceiling assembly was estimated to achieve a noise reduction rating of at least EWNR=35. (This is roughly equivalent to a noise reduction rating of STC=39 ). All exterior walls that are adjacent to the railroad are to be wood stud construction with stucco exteriors and minimum 112 inch gypsum drywall on the interior. All exterior walls include fiberglass insulation in the stud cavities. The walls were estimated to achieve a noise reduction rating of at least EWNR=40. (This is roughly equivalent to a noise reduction rating of STC=44 ). Windows are assumed to be single glazed. Most windows are operable. The operable windows were estimated to achieve a noise reduction rating of at least EWNR=22. (This is roughly equivalent to a noise reduction rating of STC=24 ). The fixed windows were estimated to achieve a noise reduction rating of at least EWNR=26. (This is roughly equivalent to a noise reduction rating of STC=28 ). The entry doors were estimated to achieve a noise reduction rating of at least EWNR=26. (This is roughly equivalent to a noise reduction rating of STC=28). Based upon the construction details and the EWNR values, the exterior to interior noise reduction was calculated for a number of rooms in the project. Results of the EWNR calculations are presented in Table 8. Table 8 DATA USED TO COMPUTE THE EXTERIOR TO INTERIOR NOISE REDUCTION Room Building Element Second Floor, Plan 1, Master Bedroom Window (operable) Entry Door Wall Roof/Ceiling Room Absorption 0 AREA (SQ. Ff.) 49.5 24.0 290.5 304.0 EWNR (dB) 22 26 40 35 Total Noise Reduction: 23.3 dB Second Floor, Plan 1, Bedroom #3 Window (operable) Wall Roof/Ceiling Room Absorption 0 33.0 197.5 155.3 22 40 35 Total Noise Reduction: 23.4 dB Mestre Greve Associates Report #01-80 Page 14 of 17 continued next page .... Table 8 (continued) DATA USED TO COMPUTE THE EXTERIOR TO INTERIOR NOISE REDUCTION Room Building Element Second Floor, Plan 1, Loft Window (operable) Wall Roof/Ceiling Room Absorption -3 AREA (SQ. Ff.) 24.8 107.2 145.0 EWNR (dB) 22 40 35 Total Noise Reduction: 26.1 dB Second Floor, Plan 2, Bedroom #2 Window (operable) Wall Roof/Ceiling Room Absorption 0 38.5 184.5 149.5 22 40 35 Total Noise Reduction: 22.8 dB Mestre Greve Associates Report #01-80 Page 15 of 17 The data in Table 8 indicate that the worst case room will achieve an outdoor to indoor noise reduction of 22.8 dB. This exceeds the worst case required reduction of 22.4 dB. Therefore, all rooms are projected to meet the 45 CNEL interior noise standard without building upgrades. 7.0 MECHANICAL VENTILATION Mestre Greve Associates Report #01-80 Page 16 of 17 Since the noise attenuation of a building falls to about 12 dB with windows open, all buildings exposed to noise levels greater than 57 CNEL will meet the 45 CNEL interior noise standard only with windows closed. In order to assume that windows can remain closed to achieve this required attenuation, adequate ventilation with windows closed must be provided per the applicable Uniform Building Code. This can be achieved with mechanical ventilation to provide fresh air. The fresh air inlet duct shall be of sound attenuating construction and shall consist of a minimum of ten feet of straight or curved duct, or six feet plus one sharp 90 degree bend. Mechanical ventilation will be required for those homes listed in Table 9 and shown in Exhibit 4. Air conditioning units may be an adequate substitute for mechanical ventilation as long as they meet the ventilation requirements specified in the Uniform Building Code. The acceptability of using air conditioners to meet the mechanical ventilation requirement varies by municipality. The local jurisdiction and the mechanical engineer for the project should be consulted. Table 9 MECHANICAL VENTILATION REQUIREMENTS BUILDING Along the San Diego Northern Railroad Home on Lot 26 Homes on Lots 65 and 66 Homes on Lots 94 through 98 Homes on Lots 100 and 101 Homes on Lots 106 and 107 Homes on Lots 116 and 117 Homes on Lots 132 and 133 Homes on Lots 148 and 149 Homes on Lots 154 and 155 Along Poinsettia Lane Homes on Lots 19 through 25 Along A venida Encinas Homes on Lots 170 and 171 Homes on Lots 191 through 201 Homes on Lots 1 through 18 \ \ \ \ ;;, ·~ 6l ~ ~ ~ "' PVT. ST. "N" PVT. ST. "N• ~=~ ,-:::::::;:::::;::::::;::::::~:=::;~:::::;:::::::;:=:::::--.... JJ"' ~~gg ?;l~Jl[J 1 ::: 115 ; .\ 10'1 ~ \ \ 106 1 101 102 \ \ \ ' r \ ~~~[!Es [!~~ .~ s -~8 63 \ ~~cg \ 9 ~l]c~l • 16 mes Requiring }lo . l Ventilation • LM~e~cb:::an::.:.1c_a -- RE,VE ASSOClA TES M,ESTREG -- Poinsettia Lane 1 19 1'7 \ . l Ventilation Exhibit 4 -M.echanic.;_equirements APPENDIX Mestre Greve Associates Report #01-80 Page 17 of 17 CALCULATION SPREADSHEETS USED TO DETERMINE NOISE LEVELS "Poinsettia Property'\ Carlsbad John Laing Homes -Pablo Leon 949-265-6854 (also contact Mike Howes@ Hofman Plannin 760-438-1465 MT Poinsettia 4-2001 (SdB SM) MacTrain Til.AlN NOlSB PREDICTION MODlll.. TIJMH LAST MODIFICATION -JULY 26, 2000 REPORT #01-80 EARLIER REPORTS FOR THIS PARCEL: #00-165 AND #97-4 AND #95-188 FRED/ MIKE; April 2001 Train Ops from Repon #96-171 (MB) confl11Ded no chanaes (Pete Aadland) NCTD Carl5bad on 7-24--00 I LOCAL I TRAIN TYPE: FREIGHT FREIGHT AMTRAK COMM. TOTAL OPS DISTRIBUTOR TOTAL 6 Day Operations 3 0 22 16 41 (7 a.m. -7 p.m.) DAY 3.0 Evening Operations 1 0 4 2 7 (7 p.m. -10 p.m.) EVENING 0.8 Night Operations 2 0 2 3 7 1110 o.m. -7 a.m.l NIGHT 2.3 Average Length 4300 0 560 720 I X where N=±X(A+B-d) Number of Engines 2 1 1 1 Engine: 1000 1. 7699115 or X=21Wavelength Number of Cars 60 0 6 8 Cars: 2000 3.539823 Speed 50 50 90 60 TOTALS SEL Car SEL O 100' 101.6 0.0 85.2 * 84.6* 101.8 • -Amtrak & Commuter SEL's include a 10.1 dB reduction Engine SEL O 100' 99.5 0.0 86.6* 88.6* 100.0 to match measurements at site on 7-27-00 104.0 ITERATED CONTOURS OTHER DISTANCES DISTANCE ++++++++++++ CNEL LEVEL++++++++++++ CNEL (CNEL VALUES! (CNEL VALUES) 50' 71.2 o.o 59.7 60.6 71.9 76' 70.0 147' 67.4 100' 68.4 o.o 56.9 57.8 69.1 200' 65.0 225' 64.0 200' 64.5 o.o 53.0 54.0 65.1 363' 60.0 260' 62.8 400' 58.7 0.0 47.4 48.6 59.4 525' 57.0 290' 61.9 CROSS Rail Distance Base Of Dist. To Pad Observer Wall Barrier Reduction DX Attenuation SECTION Elevation To Wall Wall Observer Elevation Helaht Helaht Car Enalne Car Enalne .. (.i>ssurned 3' benn) • ··1sscrici miti 53.1 160 53.9 166 50.9 5 0.0 0.0 0.0 2.5 2.3 155 53.1 160 ····················53.9 166 50.9 5 5.0 13.9 10.6 2.5 2.3 •••••• 149\nci m1ii 53.1 160 54.2 166 51.2 5 0.0 0.0 0.0 2.5 2.3 149 53.1 160 54.2 166 51.2 5 5.0 13.9 10.6 2.5 2.3 i1i(ncimit) ••• ············s2.a ......... . 146 54.7 152 51.7 5 0.0 0.0 0.0 1.7 1.7 117 52.8 146 54.7 152 51.7 5 5.5 14.9 11.8 1.7 1.7 ... 1oscricimil> •• 52.1 140 55.0 147 52.0 5 0.0 0.0 0.0 1.6 1.6 106 52.1 140 55.0 147 52.0 5 5.5 14.6 11.4 1.6 1.6 • • 101 ino miif 52.2 139 145 0.0 ........ 0.0 1.5 55.1 52.1 5 0.0 1.5 101 52.2 .... }$1:J .... 55.1 145 52.1 5 5.5 14.9 11.9 1.5 1.5 1oo,ricimiti. 51.8 210 55.7 220 52_7··· 5 0.0 0.0 0.0 5.0 4.4 100 51.8 210 55.7 220 52.7 5 4.5 11.6 8.4 5.0 4.4 9scriomii) 51.6 • 265 52.9 271 49.9 5 0.0 0.0 0.0 6.9 6.0 95 51.6 265 52.9 271 49.9 5 3.5 9.4 7.2 6.9 6.0 •• 94/ncimiti 51.4 240 52.4 246 49.4 5 0.0 0.0 0.0 6.0 5.3 94 51.4 240 52.4 246 49.4 5 4.0 11.2 8.4 6.0 5.3 ••• 66(nomit) 51.2 190 50.6 196 47.6 5 0.0 0.0 0.0 4.0 3.6 66 51.2 190 50.6 196 47.6 5 4.5 12.7 9.4 4.0 3.6 .............. •••••••••••••• sscriomiif 51.1 145 50.1 151 47.1 5 0.0 0.0 0.0 1.7 1.7 I······· 65 51.1 145 50.1 151 47.1 5 5.5 14.7 11.5 1.7 1.7 2scricimi1f···· 50.8 137 50.7 143 47.7 5 0.0 0.0 0.0 1.4 1.4 . .:26 50.8 13? .. 50.7 143 47.7 5 5.5 14.7 11.6 1.4 1.4 dlstancea to four bldg• nr (Lot 28) Lot 88 Lot 94 far (Lot 98) CNEL REQ'D relative (60 standard) TOW to pad 5.0 dB safet 0.0'safety ....... 66.6no mit 54.5 TOW=58.9' 8.0 66.6 54.4 TOW=59.2' 8.0 67.4 54.1 TOW=60.2' 8.5 67.5 54.6 TOW=60.5' 8.5 67.6 54.2 TOW=60.6' 8.5 64.3 54.5 TOW=60.2' 7.5 62.6 54.3 TOW=56.4' 6.5 63.4 53.7 TOW=56.4' 7.0 65.3 54.4 TOW=55.1' 7.5 67.4 54.3 TOW=55.6' 8.5 67.6 54.5 TOW=56.2' 8.5 MZ Poinsettia Prop 4-2001 Ave Encinas "Poinsettia Property", Carlsbad CNEL PREDICTION WORKSHEET-CALVENO Last Update: 7/10.'!IO-fg John Laing Hornes -Pablo Leon 949-265-6854 (also contact Mike Howes@ Hofman Plannin 760-438-1465 REPORT #01-80 EARLIER REPORTS FOR THIS PARCEL: #00-165 AND #97-4 AND #95-188 FRED/ MIKE; A ril 200 I Created From: MZ Arterial Mix CNEL MASTER Date Roadway Name Vehicles per day Posted Speed Limit (mph) Grade Adj. (dB) Vehicle Noise Red dB Avenida Encinas 14,000 35 0 0 Figure 5-9 Colon Beland EIR Auto MT HT Last Revised: 3-24·95 170 170 191 201 1 5 j(J ff 1"1 (TRAFFIC ONLY) To get other noise levels, Put In other distances ft Soft 1st. 0 a Auto 64.0 50 65.3 .6 (TRAFFIC ONLY) To get other distances (ft), Put in other noise levels \JNICL .:,on Hard 57 179 455 Medium Truck 56.2 60 64.1 65.8 58 154 362 Heavy Truck 57.5 nearest bldg 80 62.3 64.6 59 132 287 c;ross Section with wall with wall with wall with wall with wall ···············-······· .......... . Total 65.4 Road Elevation 85 61.9 64.3 60 113 228 90 61.5 64.0 61 97 181 95 61.1 63.8 62 83 144 100 60.8 63.6 63 71 114 105 60.5 63.4 64 61 91 110 60.2 63.2 65 53 72 115 59.9 63.0 66 45 57 120 59.6 62.8 67 39 46 farthest bldg 125 59.4 62.6 68 33 36 200 56.3 60.6 69 28 29 60 CNEL Standard 250 54.8 59.6 70 24 23 Nearest Observer Check -7, 2.7 .8 Distance Base Of Dist. 1 o Pad uoserver Wall -·oamer Reduction•• ++ r.;rvt:L++ Traffic To Wall Wall Observer Elevation Helaht Helaht Auto MT HT Soft Hard Shieldina TOTAL •• 62.4 60 63.2 •• oo ··· &nr s ·· o.o · · o.o o.o o.o 63.5 SM ••••••••••• o.o o.u [Jg331lilty ·· ···· ~!----~··· ~j 90~orst ::~ ··········~····· 0.5 5.0 5.0 o.o 59.8 M.-7 o.o 59.8 62.4 60 63.2 90 58.5 5 0.5 5.0 0.0 0.0 58.6 8-1-.4 0.0 58.6 ActuaI Wall Soecified 3.0' 3.0' ••••••••••••• •••••••• • 6B ••••••••• 60 •••••• 64.o 75 58.o • s o.o 4.9 5.o o.o 59.o 61.2 •• o.o---+--~59_0·------ 64.5 60 64.o 75 58.o 5 a.a 4.9 5.o o.o 59.o 61.2 o.o 59.o 3.o· • 66.8 60 ••• 66.8 •• 75 62.1 5 • 0.0 0.0 0.0 0.0 62.7 64.8 •••••• 0.0 62.7--+---'----I 66.8 60 66.8 75 62.1 5 0.5 5.0 0.0 0.0 59.7 61.8 0.0 59.7 3.0' ••••••• •••••••••• 66.f 60 • 66.7 70 63.4 • 5 0.0 0.0 0.0 0.0 63.1 66.t 0.0 63.1 66.7 60 66.7 70 63.4 5 2.0 4.9 5.0 0.0 59.5 6l.6 0.0 59.5 3.0' •......... ····•······ 65)f •·•··••••··· 60 .. .......... 65.4. 70 • ••••••• 6().9·· • 5 0.0 0.0 0.0 0.0 63.1 66.t -·75:0 63.1' ___ _c..cc......--1 with wall 65.4 60 65.4 70 60.9 5 1.0 4.9 5.0 o.o 59.5 6l.6 o.o 59.5 3.0' •••••••• ••••• •• •• ••• •••• 64A 60 ti4:4 • ·75 • &i.9 ···5·· o.o 5.0 o.o o.o 59.7 61.8 0.0 59_7--+-----1 with wall 64.4 60 64.4 75 58.9 5 0.0 5.0 o.o 0.0 59.7 61.8 0.0 59.7 3.0' ••• •••• ••• ••••• ••• •••• ••••••• 63.5 to • ••• 63.5 16 59. 1 • ··5 o.o o.o o.o o.o 62.6 64.8 •• •••••••• b.O 62.6~-----• 63.5 70 63.5 76 59. 1 5 1.0 4.9 5.0 0.0 59.0 61.4 0.0 59.0 ___ --"3'-'-.0'-'--1 • • • 60.6 • •• 75 • •••••• • 60:tf •••••• 80 • 56. 1 5 0.0 0.0 0.0 0.0 62.3 64'6 0.0 62.3 with wall with wall 60.6 75 60.6'-_----"8eC-o ___ 5"'6"--. '-1 ___ 5=----1-a~.5=--+---'5"-'.o'---_o~.o=----'-o'-".o--1-"'5"'9_-=-3---'M.1'-'-'-'-. ---+--=-o'-".o-+----'5-=-9·'-"3---1-__ 3::.:·=-o·_--1 Page 1 012 "Poinsettia Property", Carlsbad John Laing Homes -Pablo Leon 949-265-6854 MZ Poinsettia Prop 4-2001 Poinsettia CNEL PREDICTION WORKSHEET· CALVENO Last Update: 7/10/90-fg (also contact Mike Howes @ Hofman Planning 760-438-1465) REPORT #01-80 !EARLIER REPORTS FOR THIS PARCEL: FRED I MIKE; A ril 2001 ate Roadway Name Vehicles per day Posted Speed Limit (mph) Grade Adj. (dB) Vehicle Noise Red dB to Medium Truck Heavy Truck Total cross Section 19 (noinlt) with wall 19 •••• ••••• (iiomltf with wall 22 •••• • •• (iio iiiltf with wall 4-11-1 Poinsettia Lane 11,000 40 0 0 TRAFFIC ONLY 15 meters Soft Hard 65. 56.1 57.6 57.0 58.2 65.8 67.0 Hoaa Elevation Distance To Wall #00-165 AND #97-4 AND #95-188 Figure5-9 Coton Beland EIR nearest bldg farthest bldg (TRAFFIC ONLY) To get other noise levels, Put in other distances ft 1st. 0 50 5. 60 64.5 66.2 70 63.5 65.5 80 62.6 64.9 90 61.9 64.4 100 61.2 64.0 115 60.3 63.3 120 60.0 63.2 130 59.5 62.8 140 59.0 62.5 150 58.5 62.2 250 55.2 60.0 500 50.7 57.0 1000 46.2 54.0 .7 (TRAFFIC ONLY) To get other distances (ft), Put in other noise levels ot ar 57 4 58 163 394 59 140 313 60 120 248 61 103 197 62 88 157 63 76 124 64 65 99 65 56 79 66 48 62 67 41 50 68 35 39 69 30 31 70 26 25 Created From: Last Revised: MZ Arterial Mix CNEL MASTER 3-24-95 60 CNEL Standard Base Of Dist. To Paa vcserver wan ··aarrler Reauctlon .. ++ l,/Vt::L++ from Actua1 wan Wall Observer Elevation Heiaht Heiaht Auto MT HT Soft Hard 55.6 5 0.0 55.6 5 6.0 55.6--~5 0.0 55.6 5 6.0 51.4 5 ••••••••••••••• 0.0 51.4 5 6.0 0.0 6.0 0.0 6.6 0.0 5.2 0.0 5.4 ········· o.o·· 5.9 0.0 5.0 0.0 ••• 62.2 •••• S4J' 0.0 57.7 80.4 o.o ·······s2.2· m 5.0 56.0 li8.4 0.0. 62.0 84.e 0.0 58.0 6G.6 Poinsettia TOTAL Specified 62.2 •••••••• •••••••••• 0•00:2~:tety •••••••••••• plannedEW 57.7 57.7 tralf barr 62.2 62.2 planned 6.0' 56.0 56.0 !raff barr 62.0 62.o~-1----+ planneds:o' 58.0 58.0 tralf barr 24 (nomltf 60 so ao 90 50.6 s • o.o • •• •• • 0.2 5.3 ••••• o.o •••• 57.a --se;s 57.3 57.3 with wall 60 50 60 90 50.6 5 0.0 6.2 5.3 0.0 57.3 69.8 57.3 57.3 none 25 ••••• (nomltJ· ······55----50---as·--~g5 49.4---s· o.o ····9_0 8.o 5.5 53.3 66.9 53.3 53.3 ••••••••••• ••••••••••••••••••••••• with wall 65 50 65 95 49.4 5 0.0 9.0 8.0 5.5 53.3 66.9 53.3 53.3 none nsRV (noiiiltJ tr •••••••• 50 11 10s 49.7 s o.o 10.e 9.5 6.9 51.1 64.0 51.1-+--+---st:1 •••••••••••••• ••• •••••••••••• •••••••••• with wall 71 50 71 105 49.7 5 0.0 10.6 9.5 6.9 51.1 64.0 51.1 51.1 -------by 0.1' increment'""'s'-'-=----"-'-=----==--+-C-'-'--'----'--'-+-'--'-'--none Page 2 of 2 "Poinsettia Property", Carlsbad (Formerly "Parcel A") John Laing Homes -Timothy McSunas 949-476-9090 (also contact Mike Ryan @ CastleLyons 760-432-2626) REPORT#00-165 FRED/ MIKE; July 2000 DATE : 7-27-00 LOCATION: TIME TRAIN TYPE <i? : 2..2-ArvtTfi!.J,, K ~ : 1v Co1,.~n;:R.. ~ : t;'S-'TIZlSµGH J>Ad ct :00 At>1-rF-AK C\. : 2.'7 AM,~i4K '1 : '1 ~ bR.lrl)ult-tJ+ \o : \ 7, Ar-1\~K lo :~Y A-~fl-K \o : 5""g Art&,6/f' N =i:. \\ : \3 CDA.$1£g__ # of Engines - -- l \ - \ 2.. - I SOUND LEVEL METER 2054750 SYSTEM 1 CALIBRATOR 2242109 CALIBRATION Before:~-~9_3_, _'if __ -1 After: .__ _______ _. TIME: ?f :oo TEMP: /p'!f,0 WIND: St. t&HT COVER: ove:l!<A~r # of Cars NB/SB SPEED Hom?? Lmax SEL NOTES -c;g. 4o t.JO --~,~so lf,A\ -NB S-o Nv --II -58 "' I MPtt No LE.<fl = &0 REF. ONL y b tJB YD Ye:5 i2.2. ~8'.(p ILi /1>-~ ~ ss yo ""° 'ir .&:'t q,, ( w/'Po~~ ----Le~-S:'1 ~£FowLY "'"'\ l\li t...Jo ,-Jo ~z..3 ~K'-~ \A) I br/rf>, '"" (o >~ "lo Yc.5 ~2-"l. jC,,Lf w ( "1Wl>t ,J (. ----L£tSl = 51 $(.1(.HT '°''"~-,.,~ ~ S'S c.D No T}~.'5' g2,o Le~v,,u. 571t"Tlo,.J "Poinsettia Property", Carlsbad (Formerly "Parcel A") John Laing Homes -Timothy McSunas 949-476-9090 (also contact Mike Ryan @ CastleLyons 760-432-2626) REPORT #00-165 FRED/ MIKE; July 2000 DATE: 7-27-00 LOCATION: TIME TRAIN TYPE \\ :CO Art't-rfl.A K 11 :3S"" JJ'll1£r<r t,le. \ L : l '7 ft/Y}'fRAIC 1'2.. : l./3 AMiR~K 13 :DZ... A M"f"J~ A I< \ '; :2.0 ~~,~~f"/ I'> : 1../0 IAMYlle,11" ,J=t;-_ : : : # of Engines \ - I I I 4 - SOUND LEVEL METER 2054750 SYSTEM 1 CALIBRATOR 2242109 CALIBRATION Before:11----------i After: 9 3 . cg .___ __ ____..;;._;_~----' TIME: I I ~ \ s- TEMP: '60° WIND: Sll '=-..,.,. #of Cars NB/SB SPEED Hom?? Lmax SEL NOTES ~ N~ Lfo '(eS z,.~ Gt5.~ Lovl) +fol&,) rJc ----Lt::Q -511 $l1'-WT t:..Nf7ft, ,Ji.. i 5B "f 0 No '8 'f. '7 '-lo• '7 f"'•tJ, 4AJS~· N:t:= 1"\ rJ~ 'fo Ye:S ~<".' qo, I l o'TS ~ t,.oV}> Ht,~,J '=, SB 40 No ~, .'1 g'&,L/ M• tJ Cq>Jfr2. ,J~ ~x NB 3o '(e:S 't'J. \ /o'2..9 5" /rtlTlt F'"E. FR-, ----L-EQ. -= 5L/ C-oiJ S-"11Z • Ne.