HomeMy WebLinkAboutResolution 1987 - 0093I
RESOLUTION NO.87-93-7
APPROVING NEGATIVE DECLARMYION RE NORTH
AIRPORT DIVERSION SEWER,CONTRACT NO.7-10,.
AND SOUTH AIRPORT DIVERSION SEWER,CONTRACT
NO.7—10—1 -
A RESOLUTION OF THE BOARD OF DIRECTORS OF
COUNTY SANITATION DISTRICT NO.7 OF ORANGE
COUNTY,CALIFORNIA,APPROVING A NEGATIVE
DECLARATION AND INCORPORATING CERTAIN
MITIGATION MEASURES RE NORTH AIRPORT DIVERSION
SEWER,CONTRACT NO.7-10 AND SOUTH AIRPORT
DIVERSION SEWER,CON~PRACT NO.7-10-1,PROVIDING
FOR NOTICE THEREOF AND DIRECTING FILING OF A
NOTICE OF DETERMINATION
The Board of Directors of County Sanitation District No.7
of Orange County,California,
DOES HEREBY RESOLVE,DETERMINE AND ORDER:
Section 1 That the projects concerning which this
determination is made are described as follows:
Construction of a 18—inch gravity sewer in Business Center
Drive between Von Karman Avenue and MacArthur Boulevard;
and construction of future sewer between MacArthur
Boulevard and Von Karman Avenue in Campus Drive.
Section 2 That an Initial Study and Environmental Impact
Assessment,which said assessment is attached hereto as
Exhibit hAlt,of the environmental effects of said projects have
been undertaken and completed by the District,and the results
thereof have been reviewed by this Board;and,
Section 3 That based on the findings of the Initial Study,
this Board determines that the proposed projects could have a
significant effect on the environment,but there will not be a
significant effect because of the mitigation measures described
within the Negative Declaration which is attached hereto as
Exhibit “B”;and,
Section 4 That said Negative Declaration has been
circulated for public review for a period from June 11,1987 to
June 26,1987,during which time the following comments were
received on the document:
A.Orange County Transit District,June 22,1987
(Commented relative to maintaining lanes on
Campus Drive during construction.)
Section 5 That this Board hereby notes all comments
received on the North Airport Diversion Sewer and South Airport
Diversion Sewer Negative Declaration;and,
Section 6 That,for reasons set forth in said Exhibit “A”
and in accordance with the mitigation measures incorporated in
Exhibit “B”and by this Resolution,it is hereby found that said
projects will not have a significant effect on the environment
and,therefore,the Board hereby approves the Negative
Declaration regarding the environmental impacts of said projects;
and,
Section 7 That the Secretary be,and is hereby,
authorized and directed to file a certified copy of this
resolution,the aforesaid Initial Study and Environmental Impact
Assessment and the Negative Declaration at the District’s office
to be available for public inspection and copying;and,
Section 8 That the Secretary be,and is hereby,authorized
and directed to file a Notice of Determination in accordance with
the Guidelines Implementing the California Environmental Quality
Act of 1970,as amended.
PASSED AND ADOPTED at a regular meeting held July 8,1987.
FILED
In the Office of the Secretary
County Sanitation District
N
JUN 10 1987
Name of Project:NORTH AIRPORT DIVERSION SEWER,Cont.7-10
SOUTH AIRPORT DIVERSION SEWER,Cont.7—10—1
Location:North —in Business Center Drive and private
easements south and adjacent to 405 freeway;
South -in Campus Drive,both in the City of
Irvine
Entity or Person Undertaking Project:
A.District:
B.Other:
County Sanitation District No.7 of
Orange county
Staff Determination:
The District’s staff,having undertaken and completed an
Initial Study.of this project in accordance with Section 15063
of the Amendments to the California Environmental Quality Act,
for the purpose of ascertaining whether the proposed project
might have a significant effect on the environment,has reached
the following conclusion:
xx 1.The project will not have a significant long
term effect on the environment because of the
mitigation measures incorporated;therefore,a
Negative Declaration can be prepared.
2.The project could have a significant effect on
the environment;therefore,an EIR will be
required.
June 3,1987
Date
0
ENVIRONMENTAL IMPACT ASSESSMENT
COUNTY SANITATiON DISTRICTS
of ORANGE COUNTY.CALIFORNIA
10844 EWS.AVENUE
P.O.B0X~127
FOUNTAIN VALLEY.CALIFOPNIA 92728.8127
(714)962.2411
DATEPOSTED uune ~i~o
DATE RNAL
COUNTY SANITATION DISTRICTS
OF ORANGE COUNTY,CALIFORNIA
P.O.~OX 8127.FOUNTAIN VALLEY.CALIFORNIA 02728.8127
10844 ELLiS.FOUNTAIN VALLEY.CALIFORNIA 02708-7018
(714)962-2411
NEGATIVE DECLARATION
In accordance with the California Environmental Quality Act,County Sanitation
District No.7 of Orange County has conducted an Initial Study to determine whether
the following project may have a significant adverse effect on the environment and
on the basis of that study hereby finds:
Although the proposed project could have a significant adverse effect on the
environment,there will not be a significant adverse effect in this case because the
Mitigation Measures described on the reverse side of this sheet have been added to
the project.An Environmental Impact Report is not required.
The environmental documents which constitute the Initial Study and provide the basis
and reasons for this determination are attached and hereby made a part of this
document.
PROJECT:
North Airport Diversion Sewer (Contact No.7—10)and
:South Airport Diversion Sewer (Contract No.7-10-1 File No:
____________
Location:John Wayne Airport,Orange County
Descriptiorr Rerouting of the South Irvine Subtrunk through a new sewer line easterly
along Btsiness Center Drive to the Von Karman Trunk Sewer,and the rerouting of the
MacArthur Trunk Sewer to a new sewer line along Campus Drive to the Von Karman Trunk
Sewer.The existing lines will be decommissioned.
Lead Agency:County Sanitation DistrIct No.7 of Orange County
Address:•10844 EllIs,Fountain Valley,CalIfornia 92708—7018
Contact Person:Project:Thomas M.Dawes Telephone:(962-2411
Environmental:Thomas M.Dawes Telephone:(962-2411
NOTICE:
This document and supporting attachments are provided for review by the general public.This is an information
document about environmental effects only.Supplemental information is on file and may be reviewed in the Ot~ico
listed above.The decision-making body will review this document and potentially many other sources of infor
mation before considering the proposed project.
This Negative Declaration may become final unless written comments or an appeal is received by the office
Usted above by 4:30 p.m.on June 26,1987
.it you wish to appeal the
appropriateness or adequacy of this do~uthent,address your written comments to our finding that the project will
have a significant adverse effect on the environment:(1)identify the environmental effect(s),why they would
r,and why they would be significant,and (2)suggest any mitigation measures which you believe would eliminate
duce the effect to an acceptable level.Regarding item (1)above,explain the.basis for your comments and submit
any supporting data or references.
Dated:~/
/
COUNTY SANITATION DISTRICTS
OF ORANGE COUNTY,CALIFORNIA
P.O.BOX8127.FOUNTAIN VALLEY.CALIFORNIA 92728-8127
10844 ELLIS.FOUNTAIN VALLEY.CALIFORNIA 92708-7018
(714)982-2411
Pursuant to the California Environmental Quality Act of 1 970,the following environmentél analysis
was prepared to determine whether the project may have a significant effect on the environment.
1.~-WILT.19!PROPOSAl.P2501.?1W
OR HE Arr~.~HY~
A.BATE?
1)UMSTAHLE HARTS ~IDITIONS OW IN
CHJIGHE IN GHOLOGIC 50~ROCTUR~7
2)EXPOSURE 0?PEOPLE OR PRO~~xTT
10 CHOLOCIC !AZ7.RV5 SUCH AS WARTS—
Q0A~•LMID~.IO~•PIUDST.IDHS,
G~HO TAILOR!,OR SIMILM IAWAPDS?
3.TJJIDPOHE IL?P2AT!OW
~)~JIC!TN TOPOGRAPHY OR C~HO
su~cz R~Z~PEATUREX?
2)192 DiWCTION,OOV!RX1IG,OR
HODIPICATION OR MIT UNIQUE GEOLOGIC
OR PHYSICAl.TZATUR~?
C.CHANGE 1)1 D~0SITIOW OR EXOSION
01 REACH SANDS,OR CHANG~IN SZLTA—
?ION.D~OSI?ION OR ~OSIOR WHICH
IIAX HODIFY 19!CHM1N~.0?A RIV~OR
STREAM OR 19!RED 0?THE UC!AN OR
Mi!HAY,TNT.!?OR LAX!?
2.211 —WILT.Ill!PROPOSAL RESULT TNt
A.INCRZASEO AIR D(ISSIONS OR 0!?!-
*XORA?IOK OR MIDIEX?AIR QUALITY
REYQID PROJICTION 3!19!S~J1W OOAS?
?4R QU7~LI?f MMU,G~4mT FLAIl.
B.EXPOSURE 0?P!R~1S TO Z~ALLY
~.EV*TEO L!V~.S 0?AIR POLLUTION?
C.19!CREATION 0?OBJ~TZONABL!
ODORS?
H.AL?EPMIOII 0?AIR HOV~IT.
HOISTURE OR 104P!RATUR!,OR ANT
C!AMC!Ill CLTMAT!•EIT!~LOCALLY
(AD.7ACDI?10 PHO3~T)OR R~IONALLY
(III ODCtrrY)?
3.~-WILT.lEE PROPOSAl.~0L?
A.CHMGEX 1)1 CURATSIS.01 TEE
ODORS!OR D!R~T1OW 0?WA?!W MOVE
IN EITHRE 11221)1!OR FRESH
WArnS?
1.CHAliCES IN ABSORPTION RATES,
DRAINAGE FAlTERS,~SIOtt OR TEE
RAT!210 flIT 0?SURP?C!WAlER
C.MT TICREASE IN 11110 OR WATER
~SIOW 0?SOILS,EITSEX ON OR
B.~NCZ 1)1 TEE AI~71l?0?SURFACE
WA~III ANY WAlER HOOT?
!.DISCHA~!INTO SURFACE WATERS,
01 TN ANY ALTERATION 0?SURFACE—
WATER QUALITY,INCWDIIIO SOT tO?
T.XMITES TO TEXPERATURE,DISSOLVES
OXTOI,OR TURBIDITY?
P.ALTERATION OF 192 DIR~?IOII OR
RATE 0?FLOW OF C~fl0 WATERS?
C.CHANCE 1)1 THE QUM11ITY OW QUAL
ITY 0?C1~$1ID WATERS,EITHER ThROUGH
DIN~?ASDITIOWS OR WDIIIDRAIIALS •OR
19ROOCE INT!RO~?IO?1 0?121 AQUIFER
BY CUTS OR EXCAVATIONS?
I.EXPOSURE OP PEOPLE OR PROPERTY
TO WAT!R-REI.ATES 521.2209 SUCH AS
FLOODING OR TIDAL WAVES?
4.BIOLOGICAL ~—WILL TEE
PROPOSAL RZSUZ.T ZN,
A.~NGE 11(19!DIVERSITY OP SF!—
CIES,CHAlICE OR D!T!RIORATIOII 0?
FLORA AND FAUNA HABITAT •CHANCE Ill
19!NU)IDER 0?ANY SPECIES 0?PLANTS
OR MIIMALS,INTRODUCTION 0?NEX
SPECIES 0?PLANTS OR ANIMALS INTO MI
AREA,OR IwrROcuCTzON 0?A BARRIER
TO 19!HO~4AL R~LVI!SW43I?OR
MIGRATION OF EXISTING SPECIES?
I.R25OCTION 0?THE NTYS~RS OF MIT
UNIQUE,AESTHETICALLY SIGNIFICANT,
112!OR ERDMGERES SPECIES 0?PLANTS
OR ANIMALS?
5.ODLTURAL/&~.i.~vr~P’IC ~—
WILL 19!PROPOSAL RESULT IN AN
ALT!EXATION OF A SIGNIFICANT AACEA!
OLOGICAL.OR HISTORICAl.SI?!,STRUC
TURE,OB3IC?,OR BUILDING,PALEON—
!OWGICAL SI?!,OR OTHER IMPORTANT
CULTURAZISC!ERTII’IC RESOWC!?
y 6.A~r~tnriCH —WILT.TUE PROPOSAL
—RESULT IN TUE OROTRUCTIOW 0?ANT
SCESIC VISTA OR VI!ll OPER 10 19!
PUBLIC,OR WILT.1!!PROPOSAL RESULT
IN 19!CREATION 0?Ml AESTHETICALLY
OT?ERSIVE SIT!OPOI TO PUBLIC VI~l?
7.~—WILL TEE PROPOSAL
X RESULT IN,
A.05!0?AMID~(AZL!SIGN APOUWPS
OF FUBL OR W~Y?
X B.ISCREAS!DB4MID UPON ERISTING
——SOOSCES 0?0l~!,OR R~UIRZ 19!
D!VEI.OI~ODI?0?HER SDU~ES 0?
x
—
S.LAND ~—WILL 19!PROPOSAl.
RESULT IM~
x
—A.~l?L2C?WITS ZONING OR CERERAL
PLAN DESICXATIOWPQLXCIES FOR TB!
PROPERTY?
YES MAY19 HO
——-L
x
x
x
x
x
x
x
_L
_L
x
x
x
x
x
x
x
x
C/)
4
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1.~iYLIC?W?!W ~CD~?,UTS?—
IRO,OR PWJ*I~LAID D~S7
C.fl~OCW~IT 0?UREMI C~lTE,
IWCWDZNO POPUlATION AID !~3S!)P3
BEYDID PRO3~~C~TE LEV~.8?
—
D.VU.!.PROPOSAL ~UL?IN CONVER
51015 OP VPIWAEZ2 AGRICULTURAL LAID
50 D!VUOPNDS??
—
I.VT!.!.PROPOSAL PR~!~DE NATURM.
~IC!UTEACTIOII?
—
~•TRMI5PO~kTOP/~.,L~ULarr~—
IV!PROPOSAL RESULT INs
A.O~5ERAT!OR 0?ADDIrIOIOJ.VER!CU..
LA!)IDVD~IT ~T0ID P~IOiU.L MIALESIS.
—
P.~75..-i1 05 UISTflID PRRXflID
PACILITIES,OR D~IAND SO!
PAERDID7
C.VGAC?01051 ERTS?T1~OR fl.MNIIV
TP.MSPORTA?IOI5 SYSTVSS?
—
0.ALTER PRESVS?PA?1VRNS 0?CITCU—
LATION OR )OVIVIVT 0?PEOPLE ?*ID/OR
GOORS?
—
V.ALTER WATERROIDSE,N?.!!.,OR MR
TRA7?1C7
P.?RA7?TC EAIARDS 10 ~0ESTRIMlS,
)IDTOR VECICLES,BIC!CLISTS,OR
P~ESTRIA2IS?
C.OREATION 0?INTERNAL CIICULMION
PROBL~5S7
10.~ST05 —III!.!.NE PROPOSAL
RESULT IN MI D(PACT UPON IS!QUALITY
OR QUPRTITY 0?ERISTING R~!ATIONAL
OPPORTUNITIES?
~.IC ~.LTE AID SAPET —WILL
TEE PROPOSAL,
A.INPOLVE IS!RIEX 0?ERP!OS!OR OR
151 R~.EASE OP UAZAID~S SOESTANCES,
IWCWDING OIL,PESTICIDES,~lICAL,
OR RADIATION IN TEE EVDIT 0?Ml
ACCID~1T OR UPSET C0DIT!OSIS?
B.ERPOS!PERSONS OR PROPER?!TO
WI!DLMD TIRE HAZARDS?
C.I~W PRZVI~JS USE OP TEE
PROPERTY ERPOSE PERSONS WRO MA!
~CUPT IV!SITE 10 EAZAPD~S SUB—
STANCES •ISCWDIWG 10?lID?r.INrr~
TO OIL,PESTICIDES,~IICALS OR
RADIATION?
0.DOES TEE P~?PLACE PRESDIT
OR FUTURE SUR7O.TIDING RESID~I?3 AT
NINA 0?EXPOSURE TO TOXIC OR RADIO
ACTIVE GAS,DCP!.OSIOISS OR I)DUS?R!AL
FIRE?
1.~tD IV!PROPOSAL T1?IVR?NE
luTE NI D~C~CY ~PONSR PLJJI OR
XVACUATZON PWfl
P.I~tD 111 PROJECT US!OR DISPOS!
0?POTIVTIALLY EAZAIDOUS MATERIAL3
SUOR AS TOXIC SUESTANCES,FLAISSADLE
OR ~PL0SIVES?
2.2.~—WILL TEE PROPOSAL RESULT
flit
S~(ER OR S~?IC TAXRS
STO~(WATER DRAINAGE
J.SOLID WASTE AND DISPOSAL
V.OTSER SERVICES
is.
_______
YES MATES lID
x
x
x
x
x
x
—-~
x
x
x
x
x
x
—--I
x
x
x
——-I
x
x
x
x
x
A.VROP.NASE OP ERISTI1ID ROtS!
LEV~.S?
B.ERPOSURE OP PEOPLE ¶0 ROtS!
X.EVPLS IN EXcESS 0?~UCl?T!
SIMIDARES?
13.LION?AID —WILL TEE PROPOSAl.
PRODUCE NEW LIGHT OR GLARE?
14.PUN.IC ~vr~AID HT!Lt~TRE -
WI!.!.THE PROPOSAL CREATE TEE NETS
10!NEW FACILITIES OR ¶5!UTTSSION
OP EXISTING FACILITIES WHICH WWLD
1kV!ADVERSE P5151CM.IMPACTS?
A.TIP.!PROTECTION
B.POLICE PROTECTION
C.s~or3
0.PARIS MID OTNER RECREATION
FACILITIES
V.POlES OR NATURAL GAS
P.~p05UNICXIIONS STSTURS
C.WATER
V.
I.
x
x
——-x
x
*.oo~.~PROJECT HAVE TN POTENTIAl.10 S!GMOE TN ~3A!.11~Y 0?TN VIID1NNT,SUSSTSJITW.LT
YTS MAThS NO
j
NWC!ITS MANIlA?0?A !1SH OR WtL.Cl.!PE POPULATIOS TO DROP S!!~SZ1?-SUSTAIN!WG LZVEI.S,IIINAIVI
TO ELIMINATE A PlANT OR ANIMAl.~e(INITV.NDU~TN )&H~t*OR ~TRZC?TN MN(~0?A Ml!
DIORN~~D PLAPS?OR ANIMAl.OR E!.IWINATE DOORTANT EXAI5~.ES 0?TN MASOR PE*IO~0?CM.!P05111A
IlSIORT OR PNIIISTORT7
0
F INDINGS
S.01ES H~PROJECT HAVE TN POft)1TZAI.TO ACHIEVE SHORT—T!511.TO 110 DISADVANTAS!0?5.0.0-15*.
~-‘~~~~IS 04!WHIOl ~URO IN A
SRI!?.Dt?11IITIVE PERIOO 0?11)0 WHIZ.!La.G-1E*IP~ACTS Will.ENW)0 WEll.INTO TN ?~flV~.)
.1
C.TOES 110 PROjECT hAVE DOACTS 5111105 AN TNOTVIDWhU.Y LIMITED,BUT CWVLA?IV!LY C0.0TOCMSLZ7 ~A
PROJ~NAT DOACP 01 150 OR ION SEPARATE NSOU~T~WN)0 1)0 DOAC?01 EAQI ~CU~!IS
NLATIVE!.T SMALL.317?WHEN TN !?TWT OP TN TOTAl.0?THOR!DOACTS 01 110 !)NI~00W1 IS
II01IPICAWT.)
•
B.TOES 1131 PROJECT NAVE OIVI~0DITA5.EFFECTS %IflOI WILL CAUSE SUSSlANTIAL APJENE sr~tS 01
501AM B!IN~.!ITN*OINC?LT OR INOINCTLY?
~_~.
1JETERMIKATION:
04 THE BA~1S Or THIS DIZTLAL EVAWATIOI,
________
I P1110 TN PROPORTS PROJECT ~UZ.D NO?HAVE A SI0II?ICAII?EFFECT 01 1131 ENVIMPIPON?.AID A ,31CATIVE
ORCIARATIOI WILL B!PNPA~.
X I FillS THAT ALTIIO1~1 TN PROPOR!D PROJECT COUlD NAVE A S!OII?!CANT E?F!C?01 1)0 O4Vt~n31NT.TSSN WILL
NO?BE A SIOIIPICAW?EFFECT IN THIS CASE BECAUSE 1131 WITICATT01 )0ASUJES DESCRIBED 01 AN A?T~CHED SHEET
NAVE B~ADORD TO TN PROJECT.A lOCATIVE DECIAHATIOI WIll.BE PNPAND.
________
I FIND TN PRO~ED PROJECT MAT 11kv!A S1O4I?ICAW?EFFECT 01 TN EWVIROI)OWT.AIlS All DN1~øDrrkI.DOACT
~OO IS NOU1~.
-
Dii.1
‘yi~’’~~r’‘~_~
Project Proposal and Background
The proposed project involves the abandonment of the South Irvine Subtrunk Sewer
(extension of Michelson Drive Subtrunk Sewer)and the portion of the MacArthur
Trunk Sewer,westerly of MacArthur Boulevard;and Redirection of Flows to the
North Airport Diversion Sewer (Contract No.7-10)and South Airport Diversion
Sewer (Contract No.7—10-1).
Project Background
-
Both lines are presently located within the John Wayne Airport (JWA)property
boundaries.These lines service JWA and the area west from Von Karman Avenue
and Birch Street to MacArthur Boulevard and Campus Drive.Currently,both trunk
lines are intercepted downstream by the Gisler-Redhill Trunk Sewer.The South
Irvine Subtrunk and MacArthur Trunk sewers are both owned by the County
Sanitation District No.7 of Orange County.
The approved Consolidated Master Plan of Trunk Sewer Facilities for the County
Sanitation Districts depicts sewer flows from the MacArthur Trunk and South Irvine
Subtrunk to be redirected from their confluence with the Gisler-Redhill Trunk to the
Main Street Pump Station.The rerouting of these flows is to provide relief to the
Gisler-Redhill Trunk.
On February 26,1985,the Orange County Board of Supervisors adopted the Master
Improvement Plan for JWA.The JWA Master Plan proposes the construction of a
terminal building and parking structure directly above the existing South Irvine
Subtrunk easement,thereby precluding service access to the trunk line.JWA has
requested the County Sanitation District relocate the South Irvine Subtrunk sewer
prior to the initiation of construction of the terminal and parking structure.
The County Sahitation Districts have agreed with JWA’s request.Additionally,the
Districts are interested in relocating the MacArthur Trunk Sewer that runs dia
gonally across the JWA property because of the difficulty associated with servicing.
Therefore,the relocation of the sewer lines off of the JWA property is being treated
as one project,although possibly separated into two separate construction efforts.
—1—
EXHIBIT B—4
-
Project Analysis
The 1982 Consolidated Master Plan of Trunk Sewers Facilities,as amended,proposes
the rerouting of the South Irvine Subtrunk Sewer northerly and westerly along the
south side of the San Diego Freeway.The MacArthur Trunk Sewer would remain live
across the airport to their confluence where the proposed master sewer would cross
the freeway and convey the combined flows to the Main Street Pump Station.
However,the proposed project provides a less costly route and would not require a
new crossing of the San Diego Freeway.
The MacArthur Trunk flows would be rerouted through a new sewer line along
Campus Drive,and discharging into the existing Von Karman Trunk at Von Karman
Avenue.From the Von Karman Trunk,rerouted flows will travel north to intercept
with the Main Street Trunk,and then proceed west toward the Main Street Pump
Station (see attached exhibit).
The South Irvine Subtrunk flows would be rerouted through a new sewer line easterly
along Business Center Drive,then extending by easements through two privately
owned parcels to an existing manhole on the Von Karman Trunk Sewer.From the
Von Karman Trunk,rerouted flows will travel north and intercept with the Main
Street Subtrunk,and then proceed west toward the Main Street Pump Station.The
proposed South Irvine Subtrunk route will require easements through the Irvine
Company and Parker-Hannifin Corporation property.However,both easements will
be along existing parking areas or landscaped portions of existing parking areas.The
required easements will not eliminate any parking spaces or permanently disrupt
existing circulation patterns.
The abandonment of the MacArthur Sewer involves the construction of a sewer line
from the Von Karman Trunk Sewer,located at Von Karman Avenue and Campus
Drive,westerly to the existing airport service facilities,intercepting existing ser
vices and City of Newport Beach,and County of Orange service connections without
interruption.The existing MacArthur Trunk Sewer will bfle decommissioned and the
existing Campus Subtrunk Sewer will be abandoned.
—2—
EXHIBIT B-5
Source:County Sanitation Districts
of Orange County.
Relocation of MacArthur Trunk
And South Irvine Subtrunk
John Wayne Airport
Orange County
EXHIBIT B—6
Legend
EXISTING SEWER LINES
The proposed relocation of the MacArthur Trunk and South Jrvine Subtrunk will not
alter present or proposed service,capacities.The existing MacArthur Trunk line and
South Irvine Subtrunk line will remain underground in an idle state except for
providing sewer servicing capacities to the airport terminal.Relocation of the South
Irvine Subtrunk Sewer is anticipated to be initiated in 1987.The MacArthur Trunk
Sewer will be relocated in approximately 3 to 5 years.
-3-
EXHIBIT B—7
ENVIRONMENTAL CHECKLIST EXPLANATIONS
The following is an analysis of the project’s environmental impacts,as indicated on
the attached environmental analysis checklist.An explanation of the impact deter
mination is provided for each analysis topic.If a potential impact has been
identified,a mitigation measure that reduces the impact to a level of no significance
is provided.
1.Earth Resources Explanation
Implementation of the proposed project will require limited grading and
landform alteration.The proposed trunk routes are located within areas that
are presently developed;therefore,no significant earth resource impacts are
associated with the project.
2.b Air Explanation
The proposed project will not,generate any additional air emissions that will
reduce the level of air quality within the project area.The use of construction
vehicles and equipment may affect ambient air quality,however these impacts
are not anticipated to be significant.
3.b.c Water Explanation
The project area is presently developed.Therefore,no long—term impacts are
anticipated.The existing drainage system may experience minor disruption
during construction,but the level of disruption is not expected to be signifi
cant.~Dewatering devices may be employed during construction of the
proposed facilities.Water from dewatering activities may be discharged to the
existing flood control system.
Mitigation
Any dewatering required during construction will comply with the California
Water Quality Control Board standards.
1
EXHIBIT B—8
4.Biological Resources
S
Explanation
The proposed project involves the placement of sewer trunk lines under existing
paved roadway surfaces or landscaped medians.There are no significant bio
logical resource impacts.
5.Cultural/Scientific Resources Explanation
The proposed trunk routes will be located within areas that are presently
developed.Because of the disturbed nature of the route locations and limited
surface grading,the probability of discovery of cultural resources is small.
Should cultural resources be discovered during construction,a qualified
archaeologist/paleontologist shall be notified and site-specific mitigation
measures be developed and implemented as appropriate.
6.Aesthetics Explanation
The proposed project involves the placement of sewer trunk lines under existing
paved roadway surfaces or landscaped medians.There are no aesthetic impacts
associated with the project.All removed landscaping during project con
struction shall be replaced.
7.Energy Explanation
Implementation of the proposed project will not result in any significant
impacts on existing energy sources or create additional demand for energy use.
8.Land Use Explanation
The proposed trunk lines will be constructed under existing highways.Imple
mentation of the project will not have any significant land use impacts.The
proposed South Irvine Subtrunk route will require easements through The Irvine
Company and Parker Hannifin Corporation property.However,both easements
will be along existing parking areas or landscaped portions of parking areas.
The required easements will not eliminate any parking spaces or permanently
disrupt existing circulation patterns.
2
EXHIBIT 3—9
9.Transportation/Circulation Explanation
Construction impacts associated with the proposed project will result in the.
temporary disruption of present circulation patterns.
Mitigation
Provisions for a safe and continuous passage of local pedestrian and vehicular
traffic at all times will be made.Prior to the commencement of work a traffic
control plan shall be submitted to and approved by the City of Irvine.The traf
fic control plan shall include measures such as:
A.The erecting and maintaining of signing,striping,barricades,temporary
signals and other safety measures as directed by the city engineer.
B.The covering of existing signing not in conformance with the detour plans
for the duration of the detour.
C.The relocation of existing stop signs to provide visibility from all relocated
traffic lanes.
D.The replacement of delineators with barricades equipped with lighting
devices at construction areas where an open trench exists and/or where
traffic detour will be in existence during night hours.
E.Conformance with the guidelines in the Work Area Traffic Control
Handbook (WATCH).
F.Notification to properties adjoining the construction area in compliance
with the City of Irvine standards,if normal access is to be restricted.The
notice should include the nature and duration of the restriction.
All existing facilities,including signing,striping,signs,markings and markers shall
be restored to the original condition and/or location at the end of the construction
period.
10.Recreation Explanation
The proposed trunk lines will be constructed under existing highways offering
no recreational opportunities.Implementation of the project will not have sig
nificant impacts on recreation.
3
EXHIBIT B—lU
11.Public Health and Safety Explanation
The proposed project is not associated with hazardous substances.Therefore,
implementation of the project will not have any significant public health and
safety impacts.
12.Noise Explanation
Construction-related impacts will include a temporary increase in existing
ambient noise levels.However,the increase in noise levels will be in areas
located away from noise-sensitive land uses (i.e.residential)and will not be
significant.
13.Light and Glare Explanation
The proposed project may require onsite lighting if night construction is neces
sary.This additional light and glare will be short-term,during construction
only.No sensitive uses (e.g.,residential)are in close proximity to the project
area;therefore no impacts are anticipated.
14.Public Services and Utilities Explanation
The proposed relocation of the Mac Arthur Trunk and South Irvine Subtrunk will
reroute existing sewage flows to the Von Karman Trunk Sewer,thus providing
needed relief to the Gisler—Redhill Trunk Sewer.The proposed relocations will
not impact existing service capacities.County Sanitation District No.7 of
Orange County’s 1982 Consolidated Master Plan of Trunk Sewer Facilities,as
amended,depicts the South Irvine Subtrunk Sewer being rerouted northerly and
westerly along the south side of the San Diego Freeway,to be joined by the
MacArthur Trunk Sewer,and cross under the freeway to the Main Street Pump
Station.The proposed project is a change in routing from what is shown in the
District’s master plan.
4
EXHIBIT B—Il
Mitigation
The Consolidated Master Plan of TrUnk Sewer Facilities should be amended to
reflect the proposed rerouting of the facilities to the Main Street Pump
Station.No significant impacts are anticipated from the proposed modification
to the master plan.
5
EXHIBIT B—12
STATE OF CALIFORNIA)
SS.
OJUJ~.7rY OF ORA~E
I,RITA J.BRC~~1N,Secretary of the Board of Directors of County
Sanitation District No.7 of Orange County,California,do hereby certify that
the foregoing Resolution No.87-93-7 was passed and adopted at a regular
flEeting of said Board on the 8th day of July,1987,by the following vote,to
wit:
AYES:Richard B.Edgar,Chairmen,John C.Cox,Jr.,Dan Griset,Sally
Anne Miller,Don Roth,Don E.Smith,James Wabner
NOES:None
ABSENT:None
IN WITNESS WHEREOF,I have hereunto set my hand and affixed the official
seal of County Sanitation District No.7 of Orange County,California,this
8th day of July,1987.
Rita J.Brown,Secretary
Board of Directors of County
Sanitation District No.7
of Orange County,California