HomeMy WebLinkAboutCT 01-09; LA COSTA TOWN SQUARE COMMERCIAL; ACOUSTICAL HVAC COMPLIANCE ASSESSMENT; 2014-10-16,.
Investigative Science and Engineering, Inc.
October 16, 2014
Mr. Mark Langan
Smith Consulting Architects
13280 Evening Creek Drive South, Suite 125
San Diego, CA 92128
The Leader in Scientific Consu/ling and Research ...
SAN DIEGO CORPORATE OFFICE
P.O. Box488/1134 D Street, Ramona, CA 92065
Phone: 760-787-0016
Fax: 760-787-9165
www.ise.us
RE: ACOUSTICAL HVAC COMPLIANCE ASSESSMENT
LA COSTA TOWN SQUARE BUILDING 23-CARLSBAD, CA
ISE PROJECT #14-020
Dear Mark:
At your request, Investigative Science and Engineering, Inc. (ISE) has examined
the acoustical compliance of rooftop HVAC units within the La Costa Town Square
(LCTS) Building 23 commercial development located in Carlsbad, CA. Our findings are
presented in this summary letter report.
Project Background
The La Costa Town Square commercial project consists of multiple proposed
retail tenant structures and future development pads located on approximately 37.3
acres within the City of Carlsbad as shown in Figure 1 on the following page. The site is
located at the intersection of Rancho Santa Fe Road and La Costa Avenue, and is
surrounded predominately by a mix of single-and multi-family residential lots as shown
in Figure 2 on Page 3 of this report.
Specific Purpose and Need
The LCTS property contains, as part of its development, a concrete tilt-up multi-
tenant commercial structure having a nominal roof height of 23-feet above ground level
(AGL), and average parapet top of 30-feet AGL (Building 23). The structure is located in
the eastern portion of the project site (as also shown in Figure 2), adjacent to a proposed
single-family residential development immediately east of the LCTS development parcel.
As a result of the proposed location of HVAC units atop Building 23, the City has
requested a screening compliance assessment of these units to ascertain compliance
with a 60 dBA Leq-h (hourly energy average) property line noise threshold. The purpose
of this report is to demonstrate compliance of said HVAC units.
AEROSPACE I FORENSIC ENGINEERING-ACOUSTICS-VIBRATION -MATERIALS SCIENCE
EXPERT WITNESS -AIR QUALITY & ENVIRONMENTAL COMPLIANCE
Investigative Science and Engineering, Inc.
FIGURE 2: Project Study Area Parcel Map (ISE 1 0/14)
Mr. Mark Langan
Acoustical HVAC Compliance Assessment
La Costa Town Square Building 23-Carlsbad, CA
ISE Project #14-020
October 16, 2014
Page 3
183 Acoustical Model Input Deck I Output Results
Mr. Mark Langan
Acoustical HVAC Compliance Assessment
La Costa Town Square Building 23-Carlsbad, CA
ISE Project #14-020
October 16, 2014
Page 7
IS3 .PROGRAM INPUT DECK -(C) 2014 INVESTIGATIVE SCIENCE & ENGINEERING INC.
GLOBAL VARIABLE DECLARATION
PROBLEM STATEMENT: LA COSTA TOWN SQUARE HVAC ANALYSIS (UNIT 23 ONLY)
STARTING POINT (XY IN FEET): 6257999.1,1973173.4
ENDING POINT (XY IN FEET): 6263226.7,1976840.6
ANALYSIS FREQUENCY (HZ): 500
REFERENCE DISTANCE FOR SOUND (DIN FEET): 15
SOUND PROPAGATION COEFF XLOG10: 20
EXCESS ATTENUATION (DB): 0
COMPUTATIONAL STEP DISTANCE {IN FEET): 3
RECEPTOR ELEVATION (IN FEET): 5
ACOUSTIC SOURCE DECLARATION (XYZ -SOUND LEVEL -LABEL)
NUMBER OF SOURCE POINTS: 12
6261163.5,1975114.2,24,80,HVAC 23-1
6261174.5,1975123.1,24,80,HVAC 23-2
6261171.5,1975095.5,24,80,HVAC 23-3
6261180,1975096.4,24,80,HVAC 23-4
6261164,1975084,24,80,HVAC 23-5
6261172.5,1975084.9,24,80,HVAC 23-6
6261169,1975057.4,24,80,HVAC 23-7
6261185,1975036,24,80,HVAC 23-8
6261187.5,1975018.2,24,80,HVAC 23-9
6261189.5,1974998.2,24,80,HVAC 23-10
6261192,1974978.8,24,80,HVAC 23-11
6261193.5,1974963.1,24,80,HVAC 23-12
BARRIER SEGMENT DECLARATION (START XY -END XY -HEIGHT -STC -LABEL)
NUMBER OF BARRIER PAIRS: 155
6259697.5,1974621.2,6259614,1974682.8,30,0,BLDG 1
6259614,1974682.8,6259657.5,1974732.2,30,0,BLDG 1
6259657.5,1974732.2,6259737.5,1974669.5,30,0,BLDG 1
6259737.5,1974669.5,6259697.5,1974621.2,30,0,BLDG 1
6259655.5,1974765.8,6259602.5,1974805.4,30,0,BLDG 2
6259602.5,1974805.4,6259671.5,1974884.2,30,0,BLDG 2
6259671.5,1974884.2,6259721.5,1974845.5,30,0,BLDG 2
6259721.5,1974845.5,6259656,1974765.8,30,0,BLDG 2
6259878,1974996.9,6259860,1975053.5,30,0,BLDG 3
6259860,1975053.5,6259911.5,1975070.9,30,0,BLDG 3
6259911.5,1975070.9,6259916,1975057.5,30,0,BLDG 3
6259916,1975057.5,6259930,1975061.5,30,0,BLDG 3
6259930,1975061.5,6259944,1975019.1,30,0,BLDG 3
6259944,1975019.1,6259877.5,1974996.9,30,0,BLDG 3
6260023,1975047.6,6260003,1975101.1,30,0,BLDG 4
6260003,1975101.1,6260067.5,1975125.1,30,0,BLDG 4
6260067.5,1975125.1,6260085.5,1975068.5,30,0,BLDG 4
6260085.5,1975068.5,6260024,1975047.6,30,0,BLDG 4
6260194,1975078.2,6260159,1975182.9,30,0,BLDG 5
6260159,1975182.9,6260279,1975224.6,30,0,BLDG 5
6260279,1975224.6,6260315,1975118.2,30,0,BLDG 5
6260315,1975118.2,6260194.5,1975077.9,30,0,BLDG 5
6260413,1974896.2,6260401,1974930,30,0,BLDG 6
6260401,1974930,6260398,1974929.6,30,0,BLDG 6
6260398,1974929.6,6260376,1974995,30,0,BLDG 6
6260376,1974995,6260402.5,1975004.4,30,0,BLDG 6
6260402.5,1975004.4,6260405,197500!.6,30,0,BLDG 6
6260405,1975001.6,6260411.5,1975003.9,30,0,BLDG 6
6260411.5,19750Q3.9,6260415,1975010.1,30,0,BLDG 6
6260415,1975010.1,6260426.5,1975014.5,30,0,BLDG 6
6260426.5,1975014.5,6260437.5,1975009.6,30,0,BLDG 6
6260437.5,1975009.6,6260441,1974998.5,30,0,BLDG 6
6260441,1974998.5,6260438,1974990.5,30,0,BLDG 6
6260438,1974990.5,6260462.5,1974930,30,0,BLDG 6
6260462.5,1974930,6260459.5,1974926,30,0,BLDG 6
6260459.5,1974926,6260464,1974913.5,30,0,BLDG 6
6260464,1974913.5,6260412,1974896.6,30,0,BLDG 6
6260453.5,1974757.4,6260414,1974876.6,30,0,BLDG 7
Mr. Mark Langan
Acoustical HVAC Compliance Assessment
La Costa Town Square Building 23-Carlsbad, CA
ISE Project #14-020
October 16, 2014
Page 8
6260414,1974876.6,6260470,1974896.6,30,0,BLDG 7
6260470,1974896.6,6260513,1974774.8,30,0,BLDG 7
6260513,1974774.8,6260493,1974767.2,30,0,BLDG 7
6260493,1974767.2,6260492,1974769.4,30,0,BLDG 7
6260492,1974769.4,6260453.5,1974757.4,30,0,BLDG 7
6260605.5,1974797.5,6260582,i974862.4,30,0,BLDG 8
6260582,1974862.4,6260588,1974865.5,30,0,BLDG 8
6260588,1974865.5,6260575.5,1974898.4,30,0,BLDG 8
6260575.5,1974898.4,6260629.5,1974916.6,30,0,BLDG 8
6260629.5,1974916.6,6260636.5,1974895.8,30,0,BLDG 8
6260636.5,1974895.8,6260640.5,1974897.1,30,0,BLDG 8
6260640.5,1974897.1,6260654.5,1974859.8,30,0,BLDG 8
6260654.5,1974859.8,6260648,1974856.1,30,0,BLDG 8
6260648,1974856.1,6260659,1974817.5,30,0,BLDG 8
6260659,1974817.5,6260605.5,1974797.9,30,0,BLDG 8
6260572.5,1974915.8,6260544,1974990,30,0,BLDG 9
6260544,1974990,6260540,1974988.8,30,0,BLDG 9
6260540,1974988.8,6260531.5,1975014.5,30,0,BLDG 9
6260531.5,1975014.5,6260534.5,1975016.8,30,0,BLDG 9
6260534.5,1975016.8,6260525,1975042.5,30,0,BLDG 9
6260525,1975042.5,6260563,1975055,30,0,BLDG 9
6260563,1975055,6260562,1975058.5,30,0,BLDG 9
6260562,1975058.5,6260582.5,1975064.2,30,0,BLDG 9
6260582.5,1975064.2,6260589,1975043.9,30,0,BLDG 9
6260589,1975043.9,6260586,1975042.5,30,0,BLDG 9
6260586,1975042.5,6260623,1974934,30,0,BLDG 9
6260623,1974934,6260572,1974916.2,30,0,BLDG 9
6260454,1975314.4,6260506,1975324.1,30,0,BLDG 10
6260506,1975324.1,6260516.5,1975267.1,30,0,BLDG 10
6260516.5,1975267.1,6260507,1975261.4,30,0,BLDG 10
6260507,1975261.4,6260509.5,1975252.5,30,0,BLDG 10
6260509.5,1975252.5,6260473,1975246.8,30,0,BLDG 10
6260473,1975246.8,6260471.5,1975256.5,30,0,BLDG 10
6260471.5,1975256.5,6260465.5,1975255.2,30,0,BLDG 10
6260465.5,1975255.2,6260454,1975313.5,30,0,BLDG 10
6260702.5,1975298.5,6260698,1975325.2,30,0,BLDG 11
6260698,1975325.2,6260703,1975326.6,30,0,BLDG 11
6260703,1975326.6,6260698,1975355,30,0,BLDG 11
6260698,1975355,6260689.5,1975353.2,30,0,BLDG 11
6260689.5,1975353.2,6260687,1975368.4,30,0,BLDG 11
6260687,1975368.4,6260714.5,1975376.4,30,0,BLDG 11
6260714.5,1975376.4,6260714.5,1975380.8,30,0,BLDG 11
6260714.5,1975380.8,6260751.5,1975386.5,30,0,BLDG 11
6260751.5,1975386.5,6260759.5,1975309.1,30,0,BLDG 11
6260759.5,1975309.1,6260702.5,1975298.5,30,0,BLDG 11
6260926,1975289,6260924,1975312.1,30,0,BLDG 12
6260924,1975312.1,6260927.5,1975312.5,30,0,BLDG 12
6260927.5,1975312.5,6260920.5,1975374.4,30,0,BLDG 12
6260920.5,1975374.4,6260943,1975377.9,30,0,BLDG 12
6260943,1975377.9,6260942,1975387.6,30,0,BLDG 12
6260942,1975387.6,6260961,1975389,30,0,BLDG 12
6260961,1975389,6260972,1975305,30,0,BLDG 12
6260972,1975305,6260947.5,1975300.1,30,0,BLDG 12
6260947.5,1975300.1,6260948.5,1975291.2,30,0,BLDG 12
6260948.5,1975291.2,6260925.5,1975289,30,0,BLDG 12
6261016.5,1975151.1,6261014.5,1975170.2,30,0,BLDG 13
6261014.5,1975170.2,6261009.5,1975170.2,30,0,BLDG 13
6261009.5,1975170.2,6261006.5,1975205.9,30,0,BLDG 13
6261006.5,1975205.9,6261029,1975207.1,30,0,BLDG 13
6261029,1975207.1,6261029.5,1975202.2,30,0,BLDG 13
6261029.5,1975202.2,6261152,1975218.6,30,0,BLDG 13
6261152,1975218.6,6261157,1975172.4,30,0,BLDG 13
6261157,1975172.4,6261016.5,1975151.6,30,0,BLDG 13
6261159.5,1974942.8,6261145,1975072.9,30,0,BLDG 23
6261145,1975072.9,6261148,1975073.8,30,0,BLDG 23
6261148,1975073.8,6261144,1975105.8,30,0,BLDG 23
6261144,1975105.8,6261147.5,1975106.6,30,0,BLDG 23
6261147.5,1975106.6,6261145.5,1975127.5,30,0,BLDG 23
6261145.5,1975127.5,6261192.5,1975132.9,30,0,BLDG 23
Mr. Mark Langan
Acoustical HVAC Compliance Assessment
La Costa Town Square Building 23-Carlsbad, CA
ISE Project #14-020
October 16, 2014
Page9
6261192.5,1975132.9,6261212.5,1974945.4,30,0,BLDG 23
6261212.5,1974945.4,6261180.5,1974941.4,30,0,BLDG 23
6261180.5,1974941.4,6261180,1974944.5,30,0,BLDG 23
6261180,1974944.5,6261159,1974942.8,30,0,BLDG 23
6260736.5,1974559.1,6260714,1974756.1,30,0,BLDG 14-15
6260714,1974756.1,6261123.5,1974801.5,30,0,BLDG 14-15
6261123.5,1974801.5,6261141.5,1974638.5,30,0,BLDG 14-15
6261141.5,1974638.5,6261142,1974602.5,30,0,BLDG 14-15
6261142,1974602.5,6261086,1974578.5,30,0,BLDG 14-15
6261086,1974578.5,6261015,1974568.8,30,0,BLDG 14-15
6261015,1974568.8,6261013,1974590,30,0,BLDG 14-15
6261013,1974590,6260907.5,1974578,30,0,BLDG 14-15
6260907.5,1974578,6260910.5,1974550,30,0,BLDG 14-15
6260910.5,1974550,6260851,1974544.1,30,0,BLDG 14-15
6260851,1974544.1,6260847.5,1974570.4,30,0,BLDG 14-15
6260847.5,1974570.4,6260736.5,1974559.1,30,0,BLDG 14-15
6260654.5,1974612.5,6260627.5,1974680,30,0,BLDG 16
6260627.5,1974680,6260647,1974687.6,30,0,BLDG 16
6260647,1974687.6,6260648,1974685,30,0,BLDG 16
6260648,1974685,6260717.5,1974712.1,30,0,BLDG 16
6260717.5,1974712.1,6260725.5,1974647.6,30,0,BLDG 16
6260725.5,1974647.6,6260676.5,1974629.9,30,0,BLDG 16
6260676.5,1974629.9,6260679.5,1974621.9,30,0,BLDG 16
6260679.5,1974621.9,6260654.5,1974612,30,0,BLDG 16
6260519,1974571.9,6260497.5,1974630.6,30,0,BLDG 17
6260497.5,1974630.6,6260571,1974658.2,30,0,BLDG 17
6260571,1974658.2,6260580,1974638.6,30,0,BLDG 17
6260580,1974638.6,6260576,1974636.9,30,0,BLDG 17
6260576,1974636.9,6260594.5,1974590.2,30,0,BLDG 17
6260594.5,1974590.2,6260565,1974579.1,30,0,BLDG 17
6260565,1974579.1,6260561.5,1974587.5,30,0,BLDG 17
6260561.5,1974587.5,6260519.5,1974571.5,30,0,BLDG 17
6260180,1974338.9,6260111,1974524.9,30,0,BLDG 18-20-25
6260111,1974524.9,6260200,1974557.5,30,0,BLDG 18-20-25
6260200,1974557.5,6260205,1974563.2,30,0,BLDG 18-20-25
6260205,1974563.2,6260214.5,1974574,30,0,BLDG 18-20-25
6260214.5,1974574,6260230,1974568.1,30,0,BLDG 18-20-25
6260230,1974568.1,6260391.5,1974627,30,0,BLDG 18-20-25
6260391.5,1974627,6260396,1974616.4,30,0,BLDG 18-20-25
6260396,1974616.4,6260489.5,1974650.2,30,0,BLDG 18-20-25
6260489.5,1974650.2,6260531,1974535.9,30,0,BLDG 18-20-25
6260531,1974535.9,6260452.5,1974506,30,0,BLDG 18-20-25
6260452.5,1974506,6260455.5,1974491.4,30,0,BLDG 18-20-25
6260455.5,1974491.4,6260443,1974485.6,30,0,BLDG 18-20-25
6260443,1974485.6,6260447.5,1974470.9,30,0,BLDG 18-20-25
6260447.5,1974470.9,6260346.5,1974433.4,30,0,BLDG 18-20-25
6260346.5,1974433.4,6260356,1974403.6,30,0,BLDG 18-20-25
6260356,1974403.6,6260180,1974338.5,30,0,BLDG 18-20-25
DISCRETE RECEPTOR POINT DECLARATION (XYZ -LABEL)
NUMBER OF DISCRETE RECEPTORS: 0
O,O,O,NOPOINT
END OF INPUT FILE -REV 4.0