Noise Calculations Worksheets - Department of City · PDF fileNoise Calculations Worksheets ... Time Wind Noise Level, dB(A) Comments Start Finish Speed Dir'n L90 L67 L50 L23 L10 L5

Forest Lawn Memorial Park Hollywood Hills Master Plan – EIR

Noise Calculations Worksheets

Provided by Acoustical Engineering Services

Ambient Noise Measurements

Acoustical Engineering Services

22801 Crespi Street, Woodland Hills, California 91364 - 818.239.4600

Long-term measurements, see attached graphs for measured noise data

114 114

Quest QC 10

Quest 2900

Matrix Environmental

Forest Lawn Hollywood Hills

SB 5/4/2010

Loc 2 - Mount Hollywood Drive.

Client: Job No:

Sheet No:Job Title:

Location:

Environmental Noise Survey

Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:

Calibration Before: Calibration After:

Notes:

2

N

Log Sheet - Forest Lawn.xls

Time Wind Noise Level, dB(A) CommentsStart Finish Speed Dir'n L90 L67 L50 L23 L10 L5 Lmin Lmax Leq

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

2

N


Measured Ambient Noise Levels

Project: Forest Lawn - Hollywood HillsLocation: 2 - Mount Hollywood TrailSources: Ambient

Date: 5/4/2010

HNL,

TIME dB(A)2:00 PM 51.63:00 PM 50.94:00 PM 50.95:00 PM 49.66:00 PM 48.67:00 PM 53.08:00 PM 51.69:00 PM 49.7

10:00 PM 48.411:00 PM 48.312:00 AM 47.61:00 AM 49.12:00 AM 46.43:00 AM 48.84:00 AM 49.45:00 AM 53.56:00 AM 56.3

55 620.0

30.0

40.0

50.0

60.0

70.0

80.0

WEI

GH

TED

NO

ISE

LEVE

L, d

BA

7:00 AM 55.68:00 AM 53.89:00 AM 51.7

10:00 AM 52.011:00 AM 50.912:00 PM 0.01:00 PM 0.0

CNEL, dB(A): 58.1

NOTES:

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

2:00

PM

3:00

PM

4:00

PM

5:00

PM

6:00

PM

7:00

PM

8:00

PM

9:00

PM

10:0

0 P

M11

:00

PM

12:0

0 A

M1:

00 A

M2:

00 A

M3:

00 A

M4:

00 A

M5:

00 A

M6:

00 A

M7:

00 A

M8:

00 A

M9:

00 A

M10

:00

AM

11:0

0 A

M12

:00

PM

1:00

PM

A-W

EIG

HTE

D N

OIS

E LE

VEL,

dB

A

TIME



Primary noise source: FWY 134 traffic

Quest 2900

Quest QC 10

114 114



Loc 3 - Intersection of W. Valleyheart Drive and Morningside Drive

SB 5/4/2010

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

3

N


Time Wind Noise Level, dB(A) CommentsStart Finish Speed Dir'n L90 L50 L10 L1 Lmin Lmax Leq

58.8 75.0 63.5

61.8

3:28 PM 3:43 PM calm 61.0 63.2 65.0 67.8

63.1 68.2 57.6 76.610:55 AM 11:10 AM calm 59.3 61.0

60.361.3 64.2 55.6 75.19:31 AM 9:46 AM calm 58.3 59.5

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

3

N




Primary noise source: Traffic from W. Valley Heart and FWY 134

Quest 2900

Quest QC 10

114 114



Loc 4 - W. Valleyheart Drive just South of Fairview Street

SB 5/4/2010

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

4N


Time Wind Noise Level, dB(A) CommentsStart Finish Speed Dir'n L90 L50 L10 L1 Lmin Lmax Leq

56.858.5 65.7 42.3 45.6

46.3 66.8 56.8

3:02 PM 3:17 PM calm 8.2 54.3

57.6

11:21 AM 11:36 AM calm 52.2 55.8 59.5 62.4

60.1 63.4 49.6 70.210:01 AM 10:16 AM calm 52.5 56.5

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

4N




Long-term measurements, see attached graphs for measured noise data

Quest 2900

Quest QC 10

114 114



Loc 5 - Mount Lee Drive.

SB 5/4/2010

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

5

N


Time Wind Noise Level, dB(A) CommentsStart Finish Speed Dir'n L90 L67 L50 L23 L10 L5 Lmin Lmax Leq

Client: Job No:

Sheet No:Job Title:

Location:


Date:Made By:

Sound Meter: S/N:

Calibrator: S/N:


Notes:

5

N


Measured Ambient Noise Levels

Project: Forest Lawn - Hollywood HillsLocation: 5 - Mount Lee DriveSources: Ambient

Date: 5/4/2010

HNL,

TIME dB(A)10:00 AM 0.011:00 AM 50.312:00 PM 50.01:00 PM 50.72:00 PM 50.23:00 PM 50.84:00 PM 54.65:00 PM 48.96:00 PM 47.87:00 PM 49.18:00 PM 49.49:00 PM 48.5

10:00 PM 50.711:00 PM 48.212:00 AM 46.71:00 AM 49.12:00 AM 44.1

48 920.0

30.0

40.0

50.0

60.0

70.0

80.0

WEI

GH

TED

NO

ISE

LEVE

L, d

BA

3:00 AM 48.94:00 AM 46.95:00 AM 49.16:00 AM 52.87:00 AM 51.38:00 AM 49.99:00 AM 49.2

CNEL, dB(A): 56.1

NOTES:

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

10:0

0 A

M11

:00

AM

12:0

0 P

M1:

00 P

M2:

00 P

M3:

00 P

M4:

00 P

M5:

00 P

M6:

00 P

M7:

00 P

M8:

00 P

M9:

00 P

M10

:00

PM

11:0

0 P

M12

:00

AM

1:00

AM

2:00

AM

3:00

AM

4:00

AM

5:00

AM

6:00

AM

7:00

AM

8:00

AM

9:00

AM

A-W

EIG

HTE

D N

OIS

E LE

VEL,

dB

A

TIME

Sean

Text Box

Noise Measurement Data at Location 1 - Performed by CAJA 2008

Construction Equipment Noise Calculations

Project: Forest Lawn Hollywood Hills

Construction Phase: Phase 1 - Central Grading

Equipment

DescriptionNo. of Equip.

Reference Noise Level at 50ft,

LeqAcoustical

Usage FactorDistance to Receptor, ft

Estimated Noise Shielding, dBA

Grading 1 86 100% 860 0

Receptor: Location 1

Results: Hourly Leq: 61.3

Source for Ref. Noise Levels: LA CEQA Thresholds Guides, 2006

9/30/2010


Construction Phase: Phase 2 - East Grading

Equipment



LmaxAcoustical



Grading 1 86 100% 750 0




9/30/2010


Construction Phase: Phase 3 - West Grading

Equipment



LmaxAcoustical



Grading 1 86 100% 2075 0




9/30/2010



Equipment



LeqAcoustical



Grading 1 86 100% 900 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 200 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 4525 0




9/30/2010



Equipment



LeqAcoustical



Grading 1 86 100% 3750 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 4050 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 4325 0




9/30/2010



Equipment



LeqAcoustical



Grading 1 86 100% 1100 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 1100 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 1000 0




9/30/2010



Equipment



LeqAcoustical



Grading 1 86 100% 1550 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 2700 0




9/30/2010



Equipment



LmaxAcoustical



Grading 1 86 100% 3900 0




9/30/2010

Construction Blasting Noise & Vibration Calculations

Blasting Noise and Vibration CalculationsRef. Caltrans 2004

Airblast

Peak Air Overpressure (psi) = K(Ds)^‐1.2

K = 0.78 to 2.5 for confined charge

K = 82 for unconfined charge

Ds = Distance (feet) / cube‐root of charge weight (lbs)

dB = 20*log(psi / 2.9x10^‐9)

lower bound upper bound

K 0.78 2.5

Distance 600 600 ft

Charge Weight 165 165 lbs

Ds 109.4 109.4

psi 0.00279 0.00894

dB 120 130 (linear peak)

Phase 1 ‐ Central Grading Air Overpressure, psi Sound Level, dB

Receptor Distance, ft Ds Lower Bound Upper Bound Lower Bound Upper Bound

R1 2000 364.6 0.00066 0.00211 107 117

R2 1900 346.4 0.00070 0.00224 108 118

R3 4850 884.3 0.00023 0.00073 98 108

R4 3400 619.9 0.00035 0.00111 102 112

R5 1650 300.8 0.00083 0.00265 109 119

Phase 2 ‐ East Grading Air Overpressure, psi Sound Level, dB

Receptor Distance, ft Ds Lower Bound Upper Bound Lower Bound Upper Bound

R1 1125 205.1 0.00131 0.00420 113 123

R2 600 109.4 0.00279 0.00894 116 127

R3 4475 815.9 0.00025 0.00080 99 109

R4 5875 1071.1 0.00018 0.00058 96 106

R5 3450 629.0 0.00034 0.00110 101 112

Phase 3 ‐ West Grading Air Overpressure, psi Sound Level, dB

Receptor Distance , ft Ds Lower Bound Upper Bound Lower Bound Upper Bound

R1 2150 392.0 0.00060 0.00193 106 116

R2 4550 829.6 0.00025 0.00079 99 109

R3 4400 802.2 0.00026 0.00082 99 109

R4 1625 296.3 0.00084 0.00270 109 119

R5 4025 733.8 0.00028 0.00091 100 110

Sound level at Receptor 2 is based on maximum 65 lbs charge weight

Printed 9/30/2010

Ground Vibration

PPV (in/sec) = K(Ds)^‐1.6

PPV = peak particle velocity in in/sec

Ds = square‐root scaled disance (distance to receiver in ft. divided by square root of charge weights in lbs.)

K = a variable subjtect to many factors

K = 24 to 242 for most conventional blasts

K = 605 for blast under extremely high confinement

lower bound upper bound

K 24 242

Distance 600 600 ft

Charge Weight 165 165 lbs

Ds 46.70993665 46.70993665

PPV 0.05 0.52 in/sec

Phase 1 ‐ Central Grading PPV, in/sec

Receptor Distance , ft Ds lower bound upper bound

R1 2000 155.7 0.007 0.075

R2 1900 147.9 0.008 0.082

R3 4850 377.6 0.002 0.018

R4 3400 264.7 0.003 0.032

R5 1650 128.5 0.010 0.102

Phase 2 ‐ East Grading PPV, in/sec


R1 1125 87.6 0.019 0.189

R2 600 46.7 0.024 0.245

R3 4475 348.4 0.002 0.021

R4 5875 457.4 0.001 0.013

R5 3450 268.6 0.003 0.031

Phase 3 ‐ West Grading PPV, in/sec


R1 2150 167.4 0.007 0.067

R2 4550 354.2 0.002 0.020

R3 4400 342.5 0.002 0.021

R4 1625 126.5 0.010 0.105

R5 4025 313.3 0.002 0.025

Vibration levels at Receptor 2 is based on maximum 65 lbs charge weight.

Printed 9/30/2010

Documents

Noise Calculations Worksheets - Department of City · PDF fileNoise Calculations Worksheets ... Time Wind Noise Level, dB(A) Comments Start Finish Speed Dir'n L90 L67 L50 L23 L10 L5