hazards and safety - millbrae 2040€¦ · capuchino drive 54.7 1 5 15 47 broadway between center...

Hazards and Safety

Millbrae General Plan Update

Public Review Draft Existing Conditions Report Page 8-57

February 2017

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58 Public Review Draft Existing Conditions Report

February 2017

TABLE 8-4

TYPICAL NOISE LEVELS

Common Outdoor Activities Noise Level

(dBA) Common Indoor Activities

110 Rock band

Jet flyover at 1,000 feet 100

Gas lawnmower at 3 feet 90

Diesel truck moving at 50 mph at 50

feet

80 Food blender at 3 feet, Garbage disposal at

3 feet

Noisy urban area, Gas lawnmower

at 100 feet

70 Vacuum cleaner at 10 feet, Normal speech

at 3 feet

Commercial area, Heavy traffic at 300

feet

60

Quiet urban daytime 50 Large business office, Dishwasher in next

room

Quiet urban nighttime 40 Theater, Large conference room

(background)

Quiet suburban nighttime 30 Library, Bedroom at night, Concert hall

(background)

Quiet rural nighttime 20 Broadcast/Recording Studio

Threshold of Human Hearing 0 Threshold of Human Hearing

Notes: dBA = A-weighted decibel; mph = miles per hour Source: Caltrans 2013.

Hazards and Safety



February 2017


February 2017

Hazards and Safety



February 2017

TABLE 8-5

HUMAN RESPONSE TO DIFFERENT LEVELS OF GROUND NOISE AND VIBRATION

Vibration-Velocity Level

Human Reaction

65 VdB Approximate threshold of perception.

75 VdB

Approximate dividing line between barely perceptible and distinctly

perceptible. Many people find that transportation-related vibration at this

level is unacceptable.

85 VdB Vibration acceptable only if there are an infrequent number of events per

day. Notes: VdB = vibration decibels referenced to 1 μ inch/second and based on the RMS velocity amplitude. Source: FTA 2006


February 2017

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Hazards and Safety



February 2017

TABLE 8-6

SUMMARY OF AMBIENT NOISE LEVEL MEASUREMENTS

City of Millbrae

Measurement Location1

Start (Date/Time)

Stop (Date/Time)

A-Weighted Sound Level (dBA)

Short-Term Leq Lmax Lmin

ST-1 March 24,

2016/12:27

PM

March 24,

2016/12:57

PM

65.4 79.0 55.1

ST-2 March 24,

2016/10:12

AM

March 24,

2016/10:42

AM

52.9 68.5 42.4

ST-3 March 24,

2016/9:18 AM

March 24,

2016/9:38 AM 57.4 71.3 50.6

ST-4 March 24,

2016/10:57

AM

March 24,

2016/11:27

AM

56.9 72.2 45.6

ST-5 March 24,

2016/1:11 PM

March 24,

2016/1:41 PM 59.2 77.1 51.0

Long-Term CNEL/Ldn Daytime Nighttime

Leq Lmax Lmin Leq Lmax Lmin

LT-1 March 24,

2016/9:00 AM

March 25,

2016/9:00 AM

64.5/67.6 61.2 90.3 50.2 55.4 84.8 40.5

1 Refer to Figure 8-6 for ambient noise level measurement locations.

Notes: dBA = A-weighted decibel; Leq = average sound level over a given period; Lmax = maximum sound level; Lmin

= minimum sound level; CNEL = Community Noise Equivalent Level; Ldn = Day-Night Noise Level Source: Field data collected by Ascent Environmental, Inc., March 2016.

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LOMITA

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CRESTVIEW

SEQUOIA

FRONTERA

LAUREL

AVIADOR

LOYO

LACLEARFIELD

LUDEMAN

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HEMLOCK

CHADBOURNE

ADRIAN

BAYVIEW

LARKSPUR

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MILLWOOD

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MANZANITA

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LASUEN

PIN

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JUAN

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CENTER

ROLLINS

TOYON

PARAMOUNT

BARCELONA

WILLOW

VALLEJO

CASTENADAEL PASEO

CUARDO

BEVERLY

PINE

MONTEREY

LA PRENDA

SYCAMORE

TUOLUMNE

CYPRESS

MCDONNELL

HACIENDA

MARCELLA

SILVA

GARDEN

SERRA

ROBLE

AUR

A VI

STA

MINORCA

AH

WA

HN

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BROOKSIDE

EL CAPITAN

BANBURY

ELMW

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OAKWOODGLENW

OOD

MATEO

VICTORIA

BON

ITA

FERNWOOD

TERRACE

SAN ANSELMO

VISTA GRANDE

PALMITO

SANT

A BA

RBAR

A

CAPUCHINO

MICHAEL

CEDAR

VIA CANON

BERKSHIRE

BARCLAY

COLO

RADO

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EL BONITO

VIEW

OLD BAYSHORE

LANDING

LINCOLN

LOREE

LIBRARY

NADINA

SPRUCE

HERMOSA

ALTO LO

MA

RIVERTON

FINEHURST

HEIDI

LANSDALE

EVERGREEN

SANTA TERESA

MADRONE

MA

PLE

DUMONT

CAMINO ALTO

HENRY

COAS

TGUA

RD

MEADOW GLEN

DEXTERROBERT

ROBLAR

SPRING VALLEY

LA MANCHA

JASMINECYPRESS

LAUREL

PAR

K

VISTA GRANDE

MURCHISON

MURCHISON

MILLBRAE AVE

M I L L SC R E E K

ST-5

ST-1ST-4

ST-2

ST-3

LT-1280

101

82

E

LZ A N J O N C R E E K

S A NF R A N C I S C O

B A Y

MI L L S C R E E K

H I GH L I N E C R E E K

M I L L S C R E E K

S A N B R U N O

B U R L I N G A M ESAN MATEO

COUNTY

S A N A N D R E A S L A K E

¯0 0.55 1.1Mi

Figure 8-6: Noise Measurement Locations

Source: Ascent Environmental 2016Map Date: 6/7/2016

Intermodal Transportation Station: BART/Caltrain/Future HSR

"A Short-term Measurement Location

%C Long-term Measurement Location

Millbrae City Limits

Schools

G150100110 01 003

Hazards and Safety



February 2017


February 2017

TABLE 8-7

SUMMARY OF MODELED EXISTING TRAFFIC NOISE LEVELS

City of Millbrae

Roadway Segment Location

CNEL (dB) at 50 feet from

Roadway Centerline

Distance to Noise Contours (Feet from Roadway Centerline)

70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

US 101 S. of Millbrae Avenue 83.8 2,407 7,611 24,070 76,115

US 101 N. of Millbrae Avenue 83.7 2,348 7,424 23,478 74,243

I-280 S. of Hillcrest Boulevard 79.9 986 3,119 9,862 31,186

I-280 N. of Larkspur 80.4 1,092 3,452 10,915 34,516

Alpine Way

Between Springfield Drive

and Clearfield Drive 47.2 – 1 3 8

Alto Loma Street East of Del Centro 45.4 – 1 2 6

Anita Drive

Between Laurel Avenue and

Magnolia Avenue 51.7 1 2 7 24

Broadway

Between Millwood Drive and

Capuchino Drive 54.7 1 5 15 47

Broadway

Between Center Street and

Ludeman Lane 59.5 5 14 45 143

Broadway

Between Meadow Glen

Avenue and Taylor Boulevard 64.5 14 45 142 450

Broadway

Between Taylor Boulevard

and Hillcrest Boulevard 63.4 11 34 109 343

Broadway (S) Between Millbrae Avenue 55.2 2 5 16 52

Hazards and Safety



February 2017

TABLE 8-7


City of Millbrae



Roadway Centerline


70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

and Magnolia Avenue

California Drive

Between Murchison Drive

and Irwin Place 61.7 7 24 75 236

Center Street

Between Broadway and El

Camino Real 56.1 2 7 21 65

Center Street

Between El Camino Real and

San Anselmo Avenue 59.2 4 13 41 131

Clearfield Drive

Between Alpine Way and El

Capitan Drive 54.2 1 4 13 42

Clearfield Drive

Between Riverton Drive and

Alpine Way 53.8 1 4 12 38

Crestview Drive


Springfield Drive 52.8 1 3 10 30

Crestview Drive

Between Springfield Drive

and Tuolumne Road 52.8 1 3 10 30

Cypress Avenue

Between Park Boulevard and

Juanita Avenue 50.3 1 2 5 17

Del Centro

Between Alto Loma Street

and Hillcrest Boulevard 49.1 – 1 4 13

El Camino Real

Between Murchison Drive

and Millbrae Avenue 69.0 39 125 394 1,246

El Camino Real

Between Millbrae Avenue

and Hillcrest Boulevard 70.2 53 167 527 1,668

El Camino Real

Between Hillcrest Boulevard

and Center Street 68.8 38 121 381 1,205

El Camino Real

Between Center Street and

Park Boulevard 67.5 28 88 279 881

Hazel Avenue


and Taylor Boulevard 45.4 – 1 2 6

Hazel Avenue


and Laurel Avenue 47.3 – 1 3 9

Helen Drive

Between Sleepy Hollow Lane

North and Sleepy Hollow

Lane East 60.4 6 17 55 175

Helen Drive

Between Sleepy Hollow Lane

East and Tioga Drive 60.5 6 18 56 176


February 2017

TABLE 8-7


City of Millbrae



Roadway Centerline


70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

Helen Drive

Between Larkspur Drive and

Sleepy Hollow Lane North 57.8 3 10 30 96

Helen Drive

Between Magnolia Avenue

and Laurel Avenue 59.8 5 15 48 151

Hillcrest Boulevard

Between Minorca Way and

Hazel Avenue 58.9 4 12 39 124

Hillcrest Boulevard

Between Vista Grande and

Minorca Way 58.6 4 12 37 116

Hillcrest Boulevard

Between Linda Vista and

Vista Grande 59.5 4 14 45 142

Hillcrest Boulevard

Between Linda Vista and

Skyline Boulevard 58.3 3 11 33 106

Hillcrest Boulevard

Between Palm Avenue and

Hazel Avenue 58.3 3 11 34 106

La Cruz

Between Poplar Avenue and

Magnolia Avenue 48.5 – 1 4 11

Larkspur Drive

Between Pinehurst Court

and Helen Drive 61.4 7 22 69 217

Larkspur Drive

Between Crestview Drive

and Pinehurst Court 61.3 7 21 67 213

Larkspur Drive

Between Helen Drive and

Ridgewood Drive 55.1 2 5 16 51

Laurel Avenue

Between Richmond Drive

and Anita Drive 55.7 2 6 19 59

Laurel Avenue

Between Hazel Avenue and

Taylor Boulevard 50.6 1 2 6 18

Lomita Avenue

Between Bayview Avenue

and Santa Barbara Avenue 54.3 1 4 13 42

Lomita Avenue

Between Ridgewood Drive

and Bayview Avenue 52.3 1 3 9 27

Magnolia Avenue

Between Park Boulevard and

Capuchino Drive 58.2 3 10 33 104

Magnolia Avenue


and Taylor Boulevard 60.7 6 19 59 186

Magnolia Between Ludeman Lane and 56.3 2 7 22 68

Hazards and Safety



February 2017

TABLE 8-7


City of Millbrae



Roadway Centerline


70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

Avenue Green Hills Drive

Millbrae Avenue

Between Rollins Road and El

Camino Real 72.5 89 282 891 2,818

Millbrae Avenue

Between Elder Avenue and

Palm Avenue 60.0 5 16 49 156

Millbrae Avenue

Between Skyline Boulevard

and Vallejo Drive 57.8 3 10 30 96

Millbrae Avenue

Between Palm Avenue and


Murchison Drive

Between Conejo Drive and

Valencia Drive 51.9 1 2 8 25

Murchison Drive

Between Marcella Way and

Sequoia Avenue 55.0 2 5 16 51

Murchison Drive

Between Ashton Avenue and

Marcella Way 54.5 1 4 14 44

Murchison Drive

Between Sequoia Drive and


Old Bayshore Highway


and Cowan Road

(Burlingame) 68.4 34 109 343 1,086

Palm Avenue


and Lansdale Avenue 54.8 2 5 15 48

Palm Avenue

Between Lansdale Avenue

and Taylor Boulevard 55.0 2 5 16 50

Palm Avenue


and Millbrae Avenue 50.9 1 2 6 19

Park Boulevard

Between Cypress Avenue

and Magnolia Avenue 55.8 2 6 19 60

Park Boulevard

Between Santa Susana

Avenue and Cypress Avenue 54.6 1 5 14 45

Poplar Avenue


and Richmond Drive 52.1 1 3 8 26

Poplar Avenue

Between La Cruz Avenue and

Hillcrest Boulevard 54.9 2 5 16 49

Richmond Drive




February 2017

TABLE 8-7


City of Millbrae



Roadway Centerline


70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

Richmond Drive

Between Tioga Drive and

Geraldine Drive 55.3 2 5 17 54

Ridgewood Drive

Between Larkspur Drive and

Mosswood Lane 52.4 1 3 9 28

Ridgewood Drive

Between Lomita Avenue and

Mosswood Lane 52.2 1 3 8 26

Riverton Drive


and Skyline Boulevard 57.1 3 8 26 81

Rollins Road

Between Adrian Road and

Broderick Road (Burlingame) 65.7 18 58 185 584

Santa Florita Avenue

Between Bayview Avenue

and Lomita Avenue 57.6 3 9 29 92

Skyline Boulevard


Larkspur Drive 65.2 17 53 166 525

Skyline Boulevard


and Hillcrest Boulevard 57.0 2 8 25 78

Sleepy Hollow Lane

Between Helen Drive and

Ahwahnee Drive 53.6 1 4 11 36

Springfield Drive

Between Alpine Way and

Crestview Drive 49.4 – 1 4 14

Taylor Boulevard

Between Elder Avenue and

Poplar Avenue 55.8 2 6 19 60

Taylor Boulevard

Between El Camino Real and

Broadway 59.6 5 15 46 145

Taylor Boulevard



Taylor Boulevard

Between Hazel Avenue and

Laurel Avenue 56.1 2 6 20 64

Tuolumne Drive


and Tuolumne Court 48.4 – 1 3 11

Vista Grande


and La Prenda 52.6 1 3 9 29

Notes: dBA = A-weighted decibel; CNEL = Community Noise Equivalent Level

Source: Ascent Environmental, Inc. 2016. Based on Caltrans Technical Noise Supplement, 2013; and FHWA Traffic Noise Model Technical

Manual, 1998.

Hazards and Safety



February 2017

TABLE 8-8

SUMMARY OF MODELED EXISTING RAILROAD NOISE LEVELS

City of Millbrae

Railroad Line Location

CNEL/Ldn (dBA) at 100 feet from

Railroad Centerline

Distance (feet) from Railroad Centerline to Noise Contours

70 CNEL (dBA)

65 CNEL (dBA)

60 CNEL (dBA)

55 CNEL (dBA)

CalTrain – CalTrain

and BART transit

East of El

Camino Real 63 35 70 150 315

Notes: dBA = A-weighted decibel; CNEL = Community Noise Equivalent Level Source: Ascent Environmental, Inc., 2016. Based on FTA, 2006

SKYLINE

SAN FRANCISCOINTERNATIONAL AIRPORT

£¤101

HELEN

HILLCREST

MAGNOLIA

PALM

MURCHISON

BROADWAY

ASHTON

EL CAMINO REAL

ANITA

TAYL

OR

LAKE

POPLAR

MILLBRAE AVE

LOMITA

ELDER

HAZEL

BAY

RICHMONDPA

RK

CRESTVIEW

SEQUOIA

FRONTERA

LAUREL

AVIADOR

LOYO

LACLEARFIELD

LUDEMAN

ENCINA

TIO

GA

HEMLOCK

CHADBOURNE

ADRIAN

BAYVIEW

LARKSPUR

CONE

JO

MILLWOOD

LEWIS

MANZANITA

SEBASTIAN

ROBIN

LASUEN

PIN

ON

JUAN

ITA

RIDGEW

OO

D

MADERA

CENTER

ROLLINS

TOYON

PARAMOUNT

BARCELONA

WILLOW

VALLEJO

CASTENADAEL PASEO

CUARDO

BEVERLY

PINE

MONTEREY

LA PRENDA

SYCAMORE

TUOLUMNE

CYPRESS

MCDONNELL

HACIENDA

MARCELLA

SILVA

GARDEN

SERRA

ROBLE

AUR

A VI

STA

MINORCA

AH

WA

HN

EE

BROOKSIDE

EL CAPITAN

BANBURY

ELMW

OOD

OAKWOODGLENW

OOD

MATEO

VICTORIA

BON

ITA

FERNWOOD

TERRACE

SAN ANSELMO

VISTA GRANDE

PALMITO

SANT

A BA

RBAR

A

CAPUCHINO

MICHAEL

CEDAR

VIA CANON

BERKSHIRE

BARCLAY

COLO

RADO

S

EL BONITO

VIEW

OLD BAYSHORE

LANDING

LINCOLN

LOREE

LIBRARY

NADINA

SPRUCE

HERMOSA

ALTO LO

MA

RIVERTON

FINEHURST

HEIDI

LANSDALE

EVERGREEN

SANTA TERESA

MADRONE

MA

PLE

DUMONT

CAMINO ALTO

HENRY

COAS

TGUA

RD

MEADOW GLEN

DEXTERROBERT

ROBLAR

SPRING VALLEY

LA MANCHA

JASMINECYPRESS

LAUREL

PAR

K

VISTA GRANDE

MURCHISON

MURCHISON

MILLBRAE AVE

M I L L SC R E E K

82

101

280

E

LZ A N J O N C R E E K

S A NF R A N C I S C O

B A Y

MI L L S C R E E K

H I GH L I N E C R E E K

M I L L S C R E E K

S A N B R U N O

B U R L I N G A M ESAN MATEO

COUNTY

S A N A N D R E A S L A K E

¯0 0.55 1.1Mi

Figure 8-7: Noise Contours: Existing Conditions

Source: Ascent Environmental 2016Map Date: 6/7/2016

Noise Contours

60 dBA

65 dBA

70 dBA

Millbrae City Limits

Schools

G150100110 01 004

Hazards and Safety



February 2017


February 2017

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Hazards and Safety



February 2017

TABLE 8-9

CALTRANS RECOMMENDED VIBRATION LEVELS

PPV (in/sec) Effect on Buildings

0.4-0.6 Architectural damage and possible minor structural damage

0.2 Risk of architectural damage to normal dwelling houses

0.1 Virtually no risk of architectural damage to normal buildings

0.08 Recommended upper limit of vibration to which ruins and ancient monuments should be

subjected

0.006-0.019 Vibration unlikely to cause damage of any type Notes: PPV = peak particle velocity; in/sec = inches per second Source: Caltrans 2004


February 2017

TABLE 8-10 MILLBRAE GENERAL PLAN LAND USE COMPATIBILITY GUIDELINES FOR COMMUNITY NOISE

ENVIRONMENTS

Land Use

Exposure (dBA CNEL)

Maximum “Normally

Acceptable”

Maximum “Conditionally Acceptable”

Unacceptable

Residential, Hotels, and Motels 60 75 >75

Outdoor Sports and Recreation,

Neighborhood Parks and Playgrounds

65 80 >80

Schools, Libraries, Museums, Hospitals,

Personal Care, Meeting Halls, Churches

60 75 >75

Office Buildings, Business Commercial,

and Professional

60 80 >80

Auditoriums, Concert Halls,

Amphitheaters

N/A 70 >70

Industrial, Manufacturing, Utilities, and

Agriculture

70 >70 N/A

Notes: dBA = A-weighted decibel; CNEL = Community Noise Equivalent Level Normally Acceptable: Specified land use is satisfactory, based upon the assumption that any buildings involved are of normal conventional construction, without any special noise insulation requirements. Conditionally Acceptable: Specific land use may be permitted only after detailed analysis of the noise reduction requirements and needed noise insulation features included in the design. Unacceptable: New construction or development should generally not be undertaken because mitigation is usually not feasible to comply with Noise Element policies. Source: City of Millbrae General Plan, 1998

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Hazards and Safety



February 2017

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February 2017

LAND USE COMPATIBILITY FOR COMMUNITY NOISE ENVIRONMENTS

Land Use Type Exterior Noise Exposure (Ldn or CNEL, dB)

55 60 65 70 75 80

Residential, hotels, and motels

Outdoor sports and recreation, neighborhood parks and playgrounds

Schools, libraries, museums, hospitals, personal care, meeting halls, churches

Office buildings, business commercial and professional

Auditoriums, concert halls, amphitheaters

Industrial, manufacturing, utilities, and agriculture

Normally Acceptable Specified land use is satisfactory, based upon the assumption that any buildings involved are of normal conventional construction, without any special noise insulation requirements.

Conditionally Acceptable Specified land use may be permitted only after detailed analysis of the noise reduction requirements and needed noise insulation features included in the design.

Unacceptable New construction or development should generally not be undertaken because mitigation is usually not feasible to comply with Noise Element policies.

Hazards and Safety



February 2017

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MAXIMUM ALLOWABLE NOISE EXPOSURE FOR STATIONARY NOISE SOURCES (1)

Daytime (5) (7 AM to 10 PM)

Nighttime (2,5) (10 PM to 7 AM)

Hourly Leq, dB (3) 55 45

Maximum Level, dB (3) 70 65

Maximum Level, dB - Impulsive Noise (4) 65 60

(1) As determined at the property line of the receiving land use. When determining the effectiveness of noise mitigation measures, the standards may be applied on the receptor side of noise barriers or other property line noise mitigation measures. (2) Applies only where the receiving land use operates or is occupied during nighttime hours. (3) Sound level measurements shall be made with "slow" meter response. (4) Sound level measurements shall be made with "fast" meter response. (5) Allowable levels shall be raised to the ambient noise levels where the ambient levels exceed the allowable levels. Allowable levels shall be reduced 5 dB if the ambient hourly Leq is at least 10 dB lower than the allowable level.

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February 2017

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Hazards and Safety



February 2017

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Hazards and Safety



February 2017

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TABLE 8-11

NOISE/LAND USE COMPATIBILITY ZONES FROM SAN FRANCISCO INTERNATIONAL AIRPORT LAND USE COMPATIBILITY PLAN

Land Use

CNEL

Below 65 dBA

65-70 dBA 70-75 dBA Over 75

dBA

Residential

Residential, single-family detached Y C N N

Residential, multi-family and single-family

attached

Y C N N

Transient lodgings Y C C N

Public/Institutional

Public and private schools Y C N N

Hospitals and nursing homes Y C N N

Places of public assembly, including places of

worship

Y C N N

Auditoriums and concert halls Y C C N

Libraries Y C C N

Outdoor music shells and amphitheaters Y N N N

Recreational

Outdoor sports arenas and spectator sports Y Y Y N


February 2017

TABLE 8-11

NOISE/LAND USE COMPATIBILITY ZONES FROM SAN FRANCISCO INTERNATIONAL AIRPORT LAND USE COMPATIBILITY PLAN

Land Use

CNEL

Below 65 dBA

65-70 dBA 70-75 dBA Over 75

dBA

Nature exhibits and zoos Y Y N N

Amusements, parks, resorts, and camps Y Y Y N

Golf courses, riding stables, and water recreation Y Y Y Y

Commercial

Offices, business and professional, and general

retail

Y Y Y Y

Wholesale, building materials, hardware Y Y Y Y

Industrial and Production

Manufacturing Y Y Y Y

Utilities Y Y Y Y

Agriculture and forestry Y Y Y Y

Mining, fishing, and resource production and

extraction

Y Y Y Y

Notes: dBA = A-weighted decibel; CNEL = Community Noise Equivalent Level Y = Yes; land use and related structures compatible without restriction. C = Conditionally compatible; Land use and related structures are permitted, provided that sound insulation is provided to reduce interior noise levels from exterior sources to CNEL 45 dBA or lower and that an aviation easement is granted to the City and County of San Francisco as operator of SFO. N = No; land use and related structures are not compatible. Source: City/County Association of Governments of San Mateo County, 2012. Comprehensive Airport Land Use Compatibility Plan for the Environs of San Francisco International Airport, page IV-18.

Hazards and Safety



February 2017

TABLE 8-12

AIRCRAFT NOISE/LAND USE COMPATIBILITY GUIDELINES ADOPTED BY CITY

Land Use CNEL Range

(dBA) General Land Use Criteria

Residential

Schools

Libraries

Churches

Hospitals

Nursing Homes

Auditoriums

Less than 65 Satisfactory, with little noise impact and requiring no special noise

insulation requirements for new construction

65 to 70 New construction or development should be undertaken only after

an analysis of noise reduction requirements is made and needed

noise insulation features included in the design.

Greater than 70 New construction or development should not be undertaken.

Commercial

Retail

Restaurants

Office Buildings

Hotels-Motels

Sports Arenas

Playgrounds

Cemeteries

Golf Courses







Conventional construction will generally be inadequate and special

noise insulation features should be included in construction.

Industrial

Manufacturing

Transportation

Communications

Utilities

Less than 75





Conventional construction will generally be inadequate and special

noise insulation features should be included in construction.

Open

Agriculture

Mining

Fishing



Greater than 75 Land use involving concentrations of people (spectator sports and

some recreational facilities) or of animals (livestock farming and

animal breeding) should generally be avoided.

Notes: dBA = A-weighted decibel; CNEL = Community Noise Equivalent Level Source: San Mateo County Comprehensive Airport Land Use Plan 1996


February 2017

Hazards and Safety



February 2017

hazards and safety - millbrae 2040€¦ · capuchino drive 54.7 1 5 15 47 broadway between center...

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