2015-0522 Mesa Data Request #1 Cover Letter · 2015-07-28 · SCE Mesa 500‐kV Substation Project CPUC Data Request #1 Item # Reference/ Page # Title Request 1 PEA, 2.0 Purpose and

STATE OF CALIFORNIA

PUBLIC UTILITIES COMMISSION Edmund G. Brown Jr., Governor

505 VAN NESS AVENUE SAN FRANCISCO, CA 94102-3298

May 22, 2015 Susan Nelson, Project Manager Regulatory Affairs Department Southern California Edison 8631 Rush Street, General Office 4 – G10Q (Ground Floor) Rosemead, CA 91770 Re: Data Request No. 1 for the Mesa 500-kV Substation Project (CPUC Proceeding A. 15-03-003) Ms. Nelson: Upon further review of Southern California Edison’s Proponent’s Environmental Assessment (PEA) for the Mesa 500-kV Substation Project, the Energy Division requests the information contained in Attachments 1 and 2 to this letter. We request that the responses to this item be provided to us within 14 days. The Energy Division reserves the right to request additional information at any point in the process. Questions relating to the Mesa 500-kV Substation Project should be directed to me at (415) 703-1966 or [email protected]. Sincerely,

MJ Orsaba

Lisa Orsaba, California Public Utilities Commission Energy Division CC: Mary Jo Borak, CPUC Infrastructure Permitting and CEQA

Molly Sterkel, CPUC Infrastructure Planning and Permitting Nicolas Sher, CPUC Legal Division

Rachel James, Ecology and Environment, Inc. Attachment 1: Data Request #1 Attachment 2: Mesa Traffic Study Outline

SCE Mesa 500‐kV Substation Project CPUC Data Request #1

Item # Reference/ Page #

Title Request

1 PEA,2.0PurposeandNeed

PowerFlowData ProvidethePowerFlowData.

2 PEA,3.0ProjectDescription,Section3.4,Page3‐2

ModificationstoExistingSubstations

Provideadetailedexplanationoftheactivitiesthatwouldbeinvolvedduringtheproposed220‐kVterminationequipmentreplacementatLagunaBellandLightpipeSubstations.Clarifyiftheproposedequipmentreplacementactivitieswouldrequireadditionaltruckandvehicletripsandtheiranticipatedduration.Inaddition,describethetypeofdisturbancethatwouldbeassociatedwiththeproposedupgradestoprotectionrelaysand/ortelecommunicationequipmentsatothersatellitesubstations.


ModificationstoExistingSubstations

Providetheestimatedduration,materialexcavationimport/exportquantities,andvehicleandtrucktripsrequiredfortheproposedrerouteofexistingtelecommunicationroutesinsidetheperimeterofVincent,Pardee,andWalnutSubstations.Attachment3‐BofthePEAalsomentionstheinstallationofnewconduitstoadjacenttransmissiontowerstoprovidediversefiberopticroutesintotheGoodrichSubstation.ClarifyifthisadditionalsubstationispartoftheproposedreroutesoftelecommunicationlinesinsideexistingsubstationslistedinPage3‐22ofthePEA.


ConversionofStreetLightSourceLine

ProvidetheestimateddurationandadetaileddescriptionoftheactivitiesandstructuresrequiredintheproposedconversionoftheexistingstreetlightsourcelineintheCityofBellGardens.

5 PEA,3.0ProjectDescription,Section3.7

HelicopterUse Page3‐84indicatesthathelicopters"mayusethepotentialstagingyardlocations,asneeded."IntheeventthestagingyardlocationsdescribedinTable3‐7cannotoptimizeflighttimetostructurelocations,clarifyifadditionalhelicopterstagingyardswouldbeused.Ifadditionalhelicopterstagingareaswouldberequired,provideapproximatesizeofsuchareas.

Submitted May 22, 2015 Page 1 of 8



Title Request


OperationandMaintenance Section3.4ofthePEAindicatesthattheproposedMesa500‐kVSubstationwouldbestaffed;however,Section3.8onlyrefersto"SwitchingCenterPersonnel,""SubstationOperationsSupervisor,""SystemOperator,"and"MaintenancePersonnel."ProvideaspecificnumberofpermanentstaffthatwouldbeworkingworkingattheproposedMesa500‐kVSubstation.


RemovalofExistingStructures

Pages3‐91and3‐92ofthePEAmentionthepotentialuseofimportedfilltobackfilltheholesleftfromremovingtemporaryshoo‐flystructuresandwoodpoles.Providetheestimatedvolumethatwouldbeimportedandpotentialsourceforthismaterial.


TrenchlessTechniques Page3‐100ofthePEAindicatesthatalternativetrenchlessmethodswouldbeusedtoinstallundergroundconduitswhereopen‐cuttrenchingmaynotbepermitted,fesible,orpreferred.Providetheanticipatedjack‐and‐boreandHDDlocationsfortheproposedproject.

9 PEA,3.0ProjectDescription,Section3.7,P.3‐102

HorizontalDirectionalDrilling

Provideacopyoftheproposed'frac‐out'contingencyplantobeusedduringHDDoperations.ClarifywhethertheproposedHDDoperationswouldhaveadrillingmudspillpreventionandcontrolplaninplace.

10 PEA,3.0ProjectDescription,Section3.5,P.3‐4

WoodPoleRemoval Provideestimateddateortimeframewhenthewind‐loadtestingandfinalnumberofwoodpolestoberemovedwouldbeavailable.


WasteManagement Providetheestimatedquantityofsolidwastethatwouldbegeneratedbytheproposedprojecttobedisposedofatapprovedlandfills.Clarifyiftheoff‐sitedisposalfacilitieslistedinTable3‐10wouldbeusedforallproposedprojectconstructionactivities.


SubstationEquipment/GreenhouseGas

ClarifyifalltheproposedMesaSubstationequipmentwouldbe100%airinsulated.Intheeventthattheproposedsubstationwouldusegas‐insulatedequiment,providetheestimatedvolumeofSF6tobestoredattheMesaSubstationsiteandtheanticipatedleakratefromgas‐insulatedequipmentduringoperations.




Title Request

13 PEA,3.0ProjectDescriptionand4.16Traffic,3.7.1.1/4.16.1.1

ConstructionRoutesandStagingAreas

Confirmthattheexistingroadwaynetworkdefinedin4.16.1.1includesaccesstothestagingareasdefinedin3.7.1.1.Ifnot,definetheprobableroutesthatwillbeusedforaccesstothestagingareasandmaterialdeliveryfromthestagingareastotheconstructionsites.

14 PEA,3.0ProjectDescription,Table3‐7

StagingYards Table3‐7identifiesfourstagingyardsfortheproposedproject.Confirmthesizeandlocationofanyadditionalstagingorlaydownyardswouldbeneededfortheproposedproject.PleaseprovideGISdataforanyadditionallocationsidentifiedthatwerenotincludedintheoriginalGISdatarequest.

15 PEA,4.1Aesthetics,p.4.1‐24

NewTelecommunicationsLinesandPoles

Thedocumentstates:"Thenewtelecommunicationslineswouldbeinstalledoverheadandinexistingandnewundergroundconduitsandwouldutilizeexistingmanholesandutilitypoles.Wherenecessary,upto46utilitypolesalongtheserouteswouldbereplaced."Explainwhetherthereplacementpoleswouldbethesametypeandheight.Iftheywillbedifferent,describethedesignandheightsofthenewpolescomparedtotheexistingpolestheywouldreplace.

16 PEA,4.1Aesthetics,p.4.1‐24‐4.1‐39

MapofPhotoLocationsforTelecommunicationLines

Provideamapormapsshowingthelocationsanddirectionsofviewsofphotographs15through24.

17 PEA,4.1Aesthetics,p.4.1‐40‐4.1‐41

PotentiallyAffectedViewerGroups

Providesourcesforthedeterminationsofsensitivityforthefivepotentiallyaffectedviewergroups.Inaddition,providetheviewersensitivitylevelforthesixthgroupoffutureviewersfortheplannedretailshoppingcenter.

18 PEA,4.1Aesthetics,p.4.1‐64,footnote2

ColoringofLSTs Thedocumentstatesinfootnote2:"ColoringofLSTelementspriortoassemblywillhamperorimpedethiscontinuouselectricpathbecauseitcreatesaninsulatorbetweentheelements.ColorapplicationtoLSTstructureswouldneedtobeappliedfollowingassemblyoftheindividualpieces."Clarifyifthisstatementappliestothepre‐assemblyapplicationofcommerciallyavailabledarkeningstainsforgalvanizedsteelforLSTs.




Title Request

19 PEA,4.1Aesthetics,p.4.1‐65

VegetationRemovalandPlantingAreas

Thedocumentstates:"TheProposedProjectwouldrequireremovalofsomematurevegetationandwouldalsoincludeinstallationofnewstreettreesatthesitefrontagealongPotreroGrandeDrive."Provideaplanofthesiteindicatingthelocationsofmaturevegetationtoberemovedandaconceptplanshowingareaswherenewstreettreesandothervegetationwouldbeplanted.Identifytheapproximateheight(s)orheightrangesofareasofmaturetreesthatwillberemoved.

20 PEA,4.1Aesthetics,p.4.1‐65‐4.1‐71

RelativeHeightsofExistingandNewStructures

IntheassessmentofimpactsforviewswithvisualsimulationsforKOPs1through13,anumberofreferencesaremadetoneworreplacementstructuresbeingrelatively(i.e.,"somewhat")shorterortallerthanexistingstructures.Wherethesereferencesoccur,identifytheheightsoftheexistingandnewstructuresortherelativeheightdifferences(e.g.,"threeLSTsandoneTSPreplacefiveexistingtowersthatrangebetween10and20feetshorterthanthereplacementstructures"or"thethreenewLSTswillbeapproximately20feettallerthanthefiveexistingLSTstheyarereplacing").InadditiontoheightsofLSTsandTSPs,provideapproximateorrelativeheightsoftheothermajorelementsdiscussed,includingtheswitchracks,transformerracks,operationsbuilding,testandmaintenancebuilding,andperimeterwall.

21 PEA,4.4Biology AgencyContacts ProvidethenamesandcontactinformationfortherepresenativesthatSCEconsultedwithatvariousgovernmentagencies(e.g.wildlifeagenciesandcountyandcityrepresentatives).

22 PEA,4.4Biology ConsultationwithUSACEandRWQCB

ProvideanupdateonthestatusofconsultationwiththeU.S.ArmyCorpsofEngineersregardinganyrequestforanApprovedJurisdictionalDetermination.Inaddition,provideanupdateonthestatusofconsultationwiththeCaliforniaRegionalWaterQualityControlBoardregardingjurisdictionalWatersoftheState.ThisinformationisneededtoevaluatepotentialimpactstoWatersoftheU.SandWatersoftheState.




Title Request

23 PEA,4.6Geology Geo/Soils/MinResourcesReferences

ElectroniccopiesofthereferencescitedintheGeology&SoilsandMineralResourcessectionsofthePEAareneededtoverifyinformationprovidedinthePEAanddeterminewhetheradditionaldataareneeded.

24 PEA,4.8HazardsandHazardousMaterials

HazardousSubstancesOnSite

ProvidealistofhazardoussubstancescurrentlybeingstoredorusedattheMesaSubstationsite,whichwouldneedtobehandled,transported,ordisposedofaspartofthedecommissioningoftheexistingsubstation.

25 PEA,4.16Traffic,Sec.4.16.4

RoadwayRepair Describemeasurestoensureanydamagedonetoarearoadways,includingbicyclelanes,resultingfromconstructionworkwouldberepairedfollowingcompletionofprojectconstruction.

26 PEA,4.16Traffic TrafficStudy Duetothehighvolumeoftrafficduringconstruction,aTrafficStudyisrequiredtosupporttheconclusionsintheimpactanalysis.ProvideaTrafficStudybasedonthe"ProposedTrafficStudyOutline"providedasAttachment#2tothisDataRequest(DataRequest#1).TheTrafficStudyshouldbebasedontheproposedoutlinebutisnotlimitedtothedatarequestedintheoutline,shouldadditionalinformationbenecessarytosupporttheconclusionsintheTrafficStudy.TheTrafficStudymustbeoverseenorpreparedapprovedbyaTrafficEngineerpriortosubmittaltotheCPUC.

27 PEA,4.18Cumulative

CumulativeProject‐‐2015MesaSubstation66‐kVCapacitor

Provideadditionaldetailsastowhattheprojectentailsandwhenconstructionoftheprojectisanticipated.


CumulativeProject‐‐NewMesaSubstationDistributionSubstationPlanCircuit

Provideadditionaldetailsastowhattheprojectentailsandwhenconstructionoftheprojectisanticipatedtostartandend.


CumulativeProject‐‐HardingSubstationElimination

Provideanupdatedscheduleofwhendemolitionisanticipatedtooccurandwhenitisexpectedtobecomplete.




Title Request


CumulativeProject‐‐Mesa‐LagunaBellNarrows66‐kVReconductoring

Provideanupdatedscheduleofwhenreconductoringisanticipatedtooccurandwhenitisexpectedtobecomplete.


CumulativeProject‐‐DistributionCircuitatWalnutGroveAvenueandLandisLane



CumulativeProject‐‐DistributionCircuitatParamountBoulevardandElbaStreet



CumulativeProject‐‐TehachapiRenewableTransmissionProject

ProvideadditionaldetailsastowhetherportionsofTRTPnearMesaSubstationwillbecompleteand,iftheyarenot,whentheywillbecompleted.ProvidedetailsaboutTRTPactivitiesoccurringnear(i.e.,within1mile)oftheMesaSubstationoranyotherprojectcomponents.


CumulativeProject‐‐Mesa‐RushNo.3LineSubtransmissionReconductoring

Provideadditionaldetailsastowhattheprojectentails,theprojectalignment,andwhenconstructionoftheprojectisanticipatedtostartandend.

35 PEA,5.0Alternatives

NoProjectAlternative IftheMesaSubstationProjectisnotapproved,wouldTRTPbeconnectedtotheMesaSubstation(i.e.,wouldthesubstationbeupgraded)aspartoftheNoProjectAlternative?WhatupgradeswouldberequiredundertheNoProjectAlternativetoconnectthe500‐kVline?

36 PEA,AppendixWaterStudy

WaterStudy Thewaterstudyspecifiesthegeneralwaterusefortheproject.Providedetailsforthewateruseduringbothconstructionandoperationsothattheirseparateimpactscanbedetermined.




Title Request

37 DeficiencyResponsePD‐01

EquipmentRemoval Phase1wouldinvolvetheremovalof"someequipmentstoredonsite."Clarifythetypeandquantityoftheequipmentthatwouldberemovedandtheintendeduseofthisremovedequipment(i.e.,ifreused,recycled,ordisposedofatanoff‐sitelocation).


LandDisturbanceperPhase ProvidetheanticipatedlanddisturbanceperconstructionphasewithintheMesaSubstationsite.


Stockpile ProvidethepotentiallocationoftheStockpileforPhase3indicatedinTable1andtheproposedmeasurestocontrolfugitivedustfromthisstockpileduringPhase2ofconstruction.


StructurestobeConstructedperPhase

ProvidetheanticipatednumberofoverheadandundergroundstructuresthatwouldbeinstalledwithintheMesaSubstationsiteduringeachphaseofconstruction.


RetainingWalls Providelocationsandassociatedtemporarydisturbanceareasfortheretainingwallsthatwouldbeconstructedordemolishedduringtheproposedsubstationconstructionphases.

42 DeficiencyResponseNOI‐01

ConstructionNoiseExposure DeficiencyResponseNOI‐01documentschangesintheanticipatednoiseforspecificactivitiesintheworstcasescenario(Phase1,4thquarterof2016)toevaluateconstructionnoise.ThewesternboundaryoftheproposedPhase1area(asdepictedinResponsetoDeficiencyQuestionPD‐01)wouldbeadjacenttotheBestWesternMarklandHotel(locatedat434PotreroGrandeDrive,MontereyPark,CA).Althoughhotelsarenotcommonlydefinedassensitivereceptors,workersandguestsatthishotelcouldbeexposedtonoiseandairemissionsinexcessofambientlevelsduringdaytimehours.ProvidetheestimateddurationandscopeofactivitiesproposedinthewesternboundaryofthePhase1constructionareaadjacenttotheBestWesternMarklandHotel.Inaddition,providetheanticipateddistancefromthesubstationsiteboundarywheremostoftheproposedPhase1constructionwouldoccur.




Title Request

43 DeficiencyResponseAIR‐01

SensitiveReceptors TheupdatedLocalizedSignificanceThreshold(LST)analysisresultsassumepresenceofreceptorslocatedatadistanceof280feetfromtheMesaSubstationsiteand100feetfromthetransmissionandsubtransmission.Justifytheseassumptionsandprovidethelocationofthesereceptors.


Mesa500‐kVSubstationProjectProposedTrafficStudyOutline

1: ExecutiveSummary Brief Project Overview

Short Discussion of Project Traffic Generation Potential

Expected Project Impacts

Summary of Mitigation Measures

2: Introduction Detailed Study Methodology

Regional Map

General Overview of Project Site and Study Area Boundary

o Site Layout Map

o Existing Roadways and Intersections in the Study Area

o Construction Routes

3: AreaDevelopment Description of Existing Land Uses Near Project Site

Description of Proposed Land Uses Near Project Site

4: ExistingStreetSystem(Baseline/2015)o Roadways Used for Project Activities (Anticipated impacted roadways included below;

Transportation Engineer to verify)

Study Area Intersections

East Markland Drive and Potrero Grande Drive

Greenwood Avenue and Potrero Grande Drive

Potrero Grande Drive and Hill Drive

San Gabriel Boulevard and Paramount Boulevard

Study Area Links

Potrero Grande Drive (between East Markland Drive and Greenwood

Avenue) (to capture impacts from substation driveway use)

Study Area Ramps

SR 60 (west) off‐ramp at East Markland Drive

SR 60 (west and east) off‐ramp at Paramount Boulevard

o Roadway Classification (per Monterey Park)

o Peak Hour Traffic Count

Traffic counts can be derived from the Monterey Park Marketplace 2015 Traffic

Impact Assessment (without project) projections if such projections reflect

actual conditions (i.e., actual growth since 2010 and projects constructed

nearby since 2010). If they do not reflect actual conditions, revise 2015 numbers

to reflect actual conditions and provide the methodology for the revision.

o Daily Traffic Volumes

Traffic counts for 2015 can be derived from the Monterey Park Marketplace

2015 Traffic Impact Assessment (without project) projections if such projections

reflect actual conditions (i.e., actual growth since 2010 and projects constructed

nearby since 2010). If they do not reflect actual conditions, revise 2015 numbers

to reflect actual conditions and provide the methodology for the revision.

Existing SCE Traffic Volumes to the proposed substation site

5: TrafficGenerationForecast Projected Trip Generation Based on Construction Activity Data

o AM peak, by construction phase

o PM peak, by construction phase

o Daily, by construction phase

Mitigation Measures, if proposed

o Projected reduction in trips at AM peak, PM peak, and daily

6: TrafficDistributionandAssignment Utilization of Roadways by Project Traffic

Projected Daily Link Volumes

o For three phases of project, using worst‐case scenario

Morning and Afternoon Peak Hour Turning Movement Volumes


Projected Freeway Ramp Volumes


7: TrafficImpactStudy/ProjectImpacts Study Area

o Selected intersections , links, on‐ and off‐ramps as listed in section 4

Intersection Analysis (using ICU procedure)

o Forecasted LOS for studied intersections during three phases of project, using worst‐

case scenario (project plus baseline)

Midblock Analysis (Links) (using HCM method)

o Forecasted LOS for links during three phases of project, using worst‐case scenario

(project plus baseline)

Ramp Analysis

o Forecasted impacts to on‐ and off‐ramps for three phases of project, using worst‐case

scenario (project plus baseline)

Cumulative Analysis


o Cumulative projects may include, but not necessarily be limited to:

Monterey Park Market Place

TRTP

New Mesa Substation Distribution Substation Plan Circuit

Mesa Substation 66‐kV Capacitor

200 East Markland Drive Specific Plan

2015 Potrero Grande Drive Specific Plan

Potrero Grande Drive Sewer Spot Repairs

Montebello Hills Specific Plan

Garfield Village Specific Plan

8: ParkingImpacts Parking During Construction

o Location of staging yards and other parking areas for vehicles associated with substation

construction

o Parking quantity

Parking During Operation

o Location and quantity

9: OtherConstructionImpacts Unusual Circumstances (e.g., truck turn radius issues, use of oversize/overweight vehicles and

any resultant safety issues, potential damage to pavement surfaces and measures for repairing

damage)

Impacts at non‐substation construction areas (e.g., telecom, other substations)

o Lane closures

o Duration of construction activities

o Number and type of vehicles involved

Proposed Traffic Control

o Lane Closures

o Construction Signage

o Safety Features

o Detours

11: MitigationMeasures Mitigation Measures to Reduce Significant Impacts to LOS, per standards in the Monterey Park

Traffic Impact Study Guidelines

Appendices Intersection Impacts Analysis Calculations

HCM Link Analysis Calculations

Documents

2015-0522 Mesa Data Request #1 Cover Letter · 2015-07-28 · SCE Mesa 500‐kV Substation Project CPUC Data Request #1 Item # Reference/ Page # Title Request 1 PEA, 2.0 Purpose and