HomeMy WebLinkAboutCT 83-01; MONARCH PLACE; ACOUSTICAL ANALYSIS REPORT; 1981-09-21• •
A C 0 U S TIC A L A N A L Y S S
TENTATIVE MAP FIL)NG
TENTATIVE TRACT NO. "75-7
REP O-R T
120 CONDO~II N I UM UNIT DEVELOPMENT LOCATED AT THEI-NTERSECT ION OF
E L CAM I NOR E A LAND LEV ANT EST R E E TIN THE CIT Y 0 F C A.R L S BAD-
PREPARED FO:R
SHAPELL INDUST~IE~ OF SAND/EGO ~NC.
9787 AERO DR1VE, S~ITE B
SAN DIEGO~ CALIFORNIA 92123
(714) 56-0--9987
SEPTEMBER 21, 1981
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T A 8 L E o F CON TEN T S
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EXECUTI VE S U ~1 MAR Y • • • • • • • • • • • • • • • • .-. • • ~. ., • • _. • • • • • • -. 'r i
Env i ronmenta I Sett i ng •••••••••••••••••••••••• '.', •••
J I Noise Impacts ••••••••••••••••••••• ~i& ••• ~ ••••• ;~. 2
I J I • M• t' t' . 1 I 9 a Ion •••••••••••••••••••• ~ •••••••••••••••• ':-" ..
I V • Ref ere nee 5 • • • • • • • • • • • • • • • • • • • • • • • • • • !.. • • • • • • • • • .~. '7
IV. Attachments
Plot plan with cross-section sample •••••••• q·.-; A-l
CNEL contour pri ntout , topography •• ' ••. ~ ••• ,' .•••••• A-2
Barrier attenuation VS'. fresnel No ••••.••••••••• A-:-3
Traffic flow diagram ••••••••••••• , ••••••••••••• A~4'
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E X E CUT I V E S UM M A 'R Y
ENVIRONMENTAL SETTING
GENERAL DESCR I PT ION: The 8.83 acre 5 I te I s loca.ted qt the
, I n t er sec t Ion 0 f E L Cam i' noR e a I and L e'v ant eSt r e e t. E 1 C cl-ln i n 0
Real Is located below the grage of thep("oject.
Traffic Noise Description: The presel)f Average Dally Tr:-1p'loads
(ADT) on EI Camino Real and Levante Street are 1.1,800 an.d 2,500
respectively. The EICamino Real AOT wf.ll gro'w a't approximately,
10% per year. Levante Street ADTgrowt,h ca,nn'ot beac¢urately
predicted.
Shopping Center Noise: Ash 0 P pin g, c e n t e r Is', I 0 C a t'e d g d, J ace n t,t 0
the pro j e c t , how eve r , r 0 uti n e n 0 i sed i s.t u r ban c· e is, not
anticipated.
NOISE IMPACTS
Traffic NQ/se: Because of th~ elevation and setback distances of.
the res ide n c est h e cum u I a t I vee f fee t s 0 fin c r 8,<;\ se, d v e h .i c'u I a r
activity will not affect residents.
S hop pin 9 C e n t erN 0 i 5 e : Com mer cia I v e h i cui a,r 9'P eT a ti 0 n s w i 1.1 (lot'
significantly impact residents.
,MITIGATION
T r a f f i c N 0 i s e : B e c a use 0 f the to p 0 'gr a p h ic (,I I a t t e:n ua t I 'on n 0
m' I t i gat ion i s n e c e s s a r y for com p I ian c e with ex i s, ti n g,a n d
applicable noise standards.
Shopping Center Noise: The occasional nuisance noise' created. by
co~mercial activity does not require mitigation.
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J N T R 0 D,U C T JON
THIS ACOUSTICAL ANALYSIS REPORT IS PREPARED PURS~UA~t T'O IRE
REQUIREMENTS OF THE CITY OF CARLSBAD NOISE ELEMENt TO THE GENE~Al
'> PLAN IvlANDATED BY THE CALIFORNIA NOI,SE IN LAND'USE PLANNIN-G ACT .. ,
THE PROPOSED DEVELOPMENT IS A ZONE CHANGE AN~ ~TRACT' M~P (~O.
75-7) FOR 120 CONDOMINIUMS AND 273 PARKING SPACES.
E N V RON MEN TAL SET TIN G
The 8.83 acre site is bordered to the we$t by EI Caril'!no' Real and
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to the south by Levante Street. As i~dicated on ,t~a'attached'
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site plan (tentative tract NO. 75-7) the land cont-ol,lr v,ar'·les-in
he i gh t from 100 feet m ea,n sea 1 eve I {r.l Sl) a-to t'/')e -north e-or n'er to
72 feet at the south corn·er of the property •. The roadway. g,r·aqe
h e i g h t s v a r y fro m 56. 4 fee t to 85 fee t • S eve r a lsi n 'Q I,.e -f a·.m: i J y
dwell ings are located immediately 'east of the site. the property
is v~getated with wild grass and severa,1 small trees a'iong the
perimeter. None of this vegetation ~easureably ~ffect~ noise
pro p a gat ion 0 nth e 5 i tea n d w I 'I I not rem a·j n o'n -sit e . aft, e r
grading.
The proposed development will consist of 12.0 m:u_lt.lple-fartllly
d)/ell ings and 273 parking spaces •
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I..c.ll~ No I sa Oescr I pt I g'D
The present Average Da II y Tr i pi oads (APT) on E I Cam I n6 Rea I a:n,d
Levante Street are approximately 11,800 (appro.ximately 6'%-t·rucks>
'> and 2,500 respectively. The E.I Ca.min.o 'Real -ADT :wi II grow ·a.t
. a p pro x I mat ely 1 0 % per yea r for s eve r a lye a r s ~ L e v~ n t e A:O· T
. growth 15 dependent on many t,actors., th~refo·re, ,I t ca·nn9·t be
I" ac,curate·1 y pred i cted, however, growth I s not ex.pec.ted. to be
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significant. Vehlclliar traffic' gener.ated by the project will be
~ppro~imately 960 dai Iy trips assuming 8 trips per dw.lll~g unit
1 <. ref: W i I I dan ass 0 c I ate s; San Die g 0 C A ). The s :pe e d lim: i t ,o,n EI
·,Camlno Real Is approximately 45 mph, and· 35 mph o,n Leva:nte.
The F H WAH I G H W AY T R A F F I C NO I S E PRE D I C T ION MOD E L, $N A Pl. 0 2 w a $
used In co~juctlon with peak hour (4:30 to. 5:30 PM ) on~ ho~r
a v era g e , A -wei 9 h ted, Sou n d Level mea sur e ri1~ n t 5.' 'M e a $ u r e'm en t. ~ w ere
taken with a calibrated M.etrologer 306dB .tim:e ·integrating, spuriq
I eve I met e r 4 0 fee t fro m the c e n t e r' 0 f the n e a re s t w ~ s·t r' an e 0 f
EI' Camino Real. EXisting COMMUNITY NOrSE EQU1VIL~Kt LEVELS (CHELl
ARE SUMMARIZED ON THE ATTACHED TABLE.
A £ommerclal complex is located adjacent to the hcrthwesf corner
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oft h e pro j e c t ,s I t e. I n g res s ~ n d . e g res s 0 f . pat r. 0 nan d com m er cia I .
vehicles will generate noise but because loading cfocksand ·r-sfu.s.e
~Ick~up are not located immediately adjacent to'thepr~Jett,
routine noise disturbance Is not ~nticipat.~.
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NO I SE MPACTS
The cumulative effects of In'crease,d vehicular' activ'ity whl not
'> s i g n i f I can t I Y a f f e c t res Ide n t sad j ace n t toE f. Cam i h Q R e,a I .,
The low ADT on Levante $,treet and the t'r.'aff it .ge,nerated by t~he
project will a I so' not si gn if i cant I y affect res i d:ents. The
o v era I I Inc rea sed AD T .i sex p e c ted t 0 b e .c 0 m p a.f i b .I ,e U e. I I e'S s
than 65 dB CNEU with ex I sti n9 surround I'ng re's i dent'i all an·d use'.
teat-tiC Hgtse lmpacts
The surface transportation noise Is-sl!mmar.i4,edln the following
table as Community Noise Equivelent Levels from 55 to: 80 decib,els
i n 5 dec I be I Inc rem e n t s.P e a k 'h our so un die v e·1 -mea s' u r ~ m e n,t s
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discussed above indicate that the$e lev,ls are fepre~entatJve ~+
actual conditions. As Indfcatvd by the calcutations, f~eCNEL
values caused by the "project generated trips" wlil' increa~e b'ut
not signifIcantly.
Met hod s 0 f E val u at ion and E q u' I pm en t : The F H \fA. f .r a e'" f J e'l d' ,
ad jus t men t 3 f or de pre sse d r 0 ad way sis a I so c a I c u'(a ta d below. A
sound level pro~agatlon factor of "5 was assumed from t'he roadway
to the bar r j e r sin c e the 9 r 0 un. d co v e .r and ,I and 5 cap I ng ,w 1,1 I ' b e -
planted.
The attenuation of traffic noise cau.sedby barr'ler Insertion-:
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'-'-r ,-... ', -...... ,. :-.. --
los s was c a I cui ate d wit h the F H 'II A bar r \i ~ r i h s e r t i on f O's.S
formula 3 • With this formula the path length difference ls
~etermlned by subtracting the distance travelle~by a 500. her~z
sound wave over the barrier from. the shortest distance. between
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the sou r c e ( t r a f f I c ) and the r eel eve r ( t h· e . r es I'd e n c eat· e a c h
cross-section.) The Fresnell Number which iSl:Ised to 'det,er:'min~
the bar r I era t ten u a t ion fro m the' I e a s t -me a, n s "" s qua red 'd a"tq
sup P I led b y the F H W A ( d e r I v e d fro m Mae k a w a,. 1 960 4) I 5 ,d'e f. t ned ,~S.
fol lows:
FRESNELL NO; =.2 X DELTA/ LAMBDA
~/HERE DELTA = PATH LENGTH, DIFFERENCE
WHERE LAMBDA ~ WAVELENGTH IK FEET
Sin c e I a m b d a for a 5 0 0 h z w' a v e = 2 f t , the. F: res n:e -1"1 Numb e r-Ls
e qua Ito del t a a t 5 0 a h zan d can· the ref 0 reb e re a (f d Ire t I y ·f r o·in
the graph attached. A cross-section of"' each repre.senta'tlye pad
elevation in relation to the road grade wasanalyz'e:d to de'termine
the C N E L ate a c h res ide n c e with 0 uta w a I I or ~. q r r i e r • . Wh e·n .
residences are exposed to CNEL values ~reater than permjt~ed by
existing and applicable regulations or s~andards they are, re-.
e x a min edt 0 c a I u c I ate the nee e s s a r y w a I I '.0 r . ·b a r r I e~r h e i 9 h t
necessary to achieve compl iance.
TOPOGRAPH I CAL ATTENUAT ION FOR' CROSS-·SECT·! ON:$' A THROUGH F
A= 6.1 dB
D= 13.1 dB
B= 1203 dB
.E= 500 dB
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C= 12.1 d'S
F = 5 •. 0 d'B
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ADJUSTED CNEL AT RES JOENCES FOR CHOSS-SEcr,IONS; A TIiROUGH F
A= 55.9 dB
D= 47.9 dB
B= 50.7 d'S
E= 57.0 dB
C= 4'9.9. d'B
F:;: 55 .• 0 dB
Commercial vehicular activity especlal-Iy at. nigh·t an,d j·n the
ea.rly morning hours may occasionall.y cau's·.e· transi.tory 'nuisance
noise. However, since loading and u'nloadin~ oper·atio:.ns are not
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concentrated near the residences, th i s'i s· n'ot a sl gn If i ca;rtt.
I m.pact.
MIT I GAT I 0 ~
Due to the elevation of the residences above· the ~Qad.ay, ~~e
unit setbacks, and the rei atively low AQT, res.ld·ents. w·i II be
out sid e 0 f the 60 dB C N E L con t 0 u.r a n.dw i I I not .b e s i .g n i f J Cern fly
affected by tr:-affic noise, therefore NO MITIGATION IS'
RECOMt4END EO.
Occasional nuisance noise cau$e~ by commercial actJvlty should ~e
reg u I ate d b Y m u n I c I p a I cod e. . S 0 un d T ran s m iss 10 n. Co n fTO I has
drafted noise legist.ation for severat 'Cal iforn·j'a: citlesan,d would
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be pIe a sed to d I c us 5 5 U c has 51 stance wit h 'Ci ty . of -tar I' $ bad-.
Officials. NO OTHER MITIGATION IS RECOf'<lMENDED.
JAMES E. DUKES
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REF ERE N C ES
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1. Wilidan Associates, San Diego, CaHfornl~: Potent'ial Traffic
Imp act s Fro m rot 0 n arc h P I ace 0 eve lop men t : S e p'te m b E? r 1 6 , J 981 ,.
2. F.F Rudder, JR. and D.F. Lam: User's fvlaoual: F·HWA Hf.ghway
Traffic Noise Prediction Model" SNAP 1.0: January 1979~ . . "
3. Simpson,M.A.: "Noise Barrier' Attenuation.; Flel:d Experience",
U • S • 0 epa r t men t 0 f T ran s p 0 r tat ion, 'F e d era r .' ·H I g_ hw-a y
Administration, Report No. FHWA-RD-76-·54., Fe·bruary 1976.":. ,':' ,
4 • F • F. R u d d e r , JR. , 0 • F. Lam, and P • 0 h:u eng: U; s e, r 0 s· r.ta n ua I :
FHWA Level 2 HIghway Traffic noise 'PredicTion 'Model,' Sta'mln'a 1.0':
May 1979.
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PRO..JECT:MCtNARCH PLACE
DATE:9/21/81
, PROPAGATION FACTOR: 15
, STREET
YEAR ADT 55 DB
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CNEL IjONTOllR,DISTANCES IN "FT .,'
(;'0 rIB 65 DB, 70 Dl;! '75 DB ,:30
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EL CAMINO REAL AT LEVANTE STREET I NTERSECT ION,
1981 11800 67 304 141 66 30 '14 7 '>
EL CAM IN':) REAL AT LEV ANTE STREET INTERSECTION
1985 17569 68 397 184 85, 40 18 ,9, "
LEVANTE STREET " 19::11 2500 58 74 34 16 7 3 ,2
CAMINO REAL CROSS-SECTION A/NO BARRIER
rlELTA A B d
.0596695 89.2693 26. :3002 l'16.0l
~. c. R. CRO:3S-SECT I ON B/NO BARRIER
DELTA A 'B d
• 8~:7753 ::=6.3134 11.9269 97 •. 4025
::.C.R. CROSS-SECTION C/NO BARRIER'
DELTA A Ef d
.780266 96.7655 11.9261;;> t07.91,2
::. -C. R. CRO:3S-SECT I ON D/NO BARRIER
DELTA A B d
.993286 111. 15~: 11.9269 122.091
::.C.R. CROSS-SECTION E/NO BARRIER
DELTA A B d
5. 64575E-04 93.6216 26 .. 8002 120.421 .-
:.C.R. CROSS-SECTION F/~O BARRIER
DELTA A B q
8. 69751E-04 110.856 27.7714 .138.6126
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Observer height is: measured' frorn the' t~Jerence pla·ne: "position (+) above,
ths, plane and n~gative (-) ~elow the plo,!e :' , : ~! i
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; • ! I : I" . ._ ** The path length di fferenc,e a mustl?e'cckulated to tW0signHicorit, fi.gures .• ' ,
If pcth length difference <3 is negative (-), 'adjustment is equel to Z'~ro.:
* ** For Trucks odd +3 dB to vol ue given by Figure C-1 •
I
Plane
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.----_ .. ~.---~"""=-2ol . I . '. : 1---. UPPER LIMIT IS 20 dB FOR fHWA LEVEL 2
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FIGURE A-4. 8ARRiER'=ArTENUATlOO 'AS A'FUHcTION6F~E "
, , FRESNEL ',WNBERF:OR :OIFFRACTI0N' ' .
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LEGEND
EXISTINGI PROJECT I FUTURE DEVELOPMENT
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t .• 2·4111146
+ 57/25.1 JOS ."
r· ,f'LE:VANTE 3T.
142/62/199 . ',.,','
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.' wILtDAN. ASSOCIAr:ES.
ANT-I'CIPA'TED TUR'NING '·VOLUMES. . . .
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