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COURTHOUSE SQUARE Q~ j1
<br />CHEVRON'S REMEDIATION SCENARIO lJ
<br />COST ESTIMATE
<br />MARION COUNTYICENTURY WESTS ESTIMATE CHEVRONIPACIFIC ENVIRONMENTAL GROUP'S ESTIMATE COMMENTS
<br />TASK 1 SYSTEM OPERATIONIMAINTENANCE
<br />Assumptbns:
<br />Remedialbn system equipment requires mainfenanca overfrvo-year operation
<br />Utility costs provided by Chevron
<br />
<br />~rojeG Manager (6 hrhnoMh) SBO 360 528,80D $28,800
<br />~ield Tech (20 hdmonth) S50 12D0 560,000 S60,D00
<br />~artslequipment (51501manth) 5150 60 $9,000 $9,D00
<br />riilities (51301month) E130 60 $7,800 57,800
<br />:z ses (trans rtalbn,oftice 5100 60 $1,000 S1,D00
<br />TASKII: QUARTERLYAIRlGROUNDWATERMONRORINGIREPORTING
<br />Project Manager (10 hdqtr) S80 200 516,D00 $16,000
<br />Review(1 Adqth S90 20 $1,800 51,800
<br />Field Tech (18 hrfqtr) S50 360 518,000 516,000
<br />DraRer(3hdqtr) S45 60 $2,700 52,700
<br />ProJect AssistaM (3 hrlqtr) 540 60 52,400 52,40D
<br />Groundxater BTEX (5 welis + 10Wqtr) a70 120 $8,4D0 $8,40D
<br />Field E~cp-bailers,PlD,auta (5150lqtr) 5150 20 $3,000 $3,000
<br />Offica Ex nses 51001 5100 20 $2,000 52,000
<br />
<br />TASK IIIA: ADDITIONAL CHARACTERIZATIONIREMEDIATION • UST NEST
<br />Assumpt(ons:
<br />Drill 4 borings to nath and west, Install 1 well and 2 arc sparga poims (to 25 feet) in 3 ot the borings
<br />Anayze 2 soil sampkslboring +1 ~,4
<br />Mayze groundwater upon drilling 3 baings, samplelanayze new rtronitaing well quarlerty
<br />RepaUng included in Tasks II and IV
<br />Drilling rates based on quotes from GeoTech Ezploratbns, Inc.
<br />1997 laboratay ratas from Nath Creek Anatylical (ChevroNPaciTic's currem lab)
<br />120 CY wil will require excavation to obtain Gosure: ~feet thidc (tQ15 feet bgs) by 30-feet diameter
<br />(costs Uom Task IIIB, without used oil ariatyses)
<br />ProJed Manager (wak plan, conVacting) :80 30 $2,400 52,400
<br />GeobgisUEngineer ;50 50 52,500 S2,SW
<br />SoiITPWquantNicaOon 5125 9 51,125 51,125
<br />Soi~ BTEX S70 5 5350 5350
<br />Groundwater BTEX S70 24 $1,680 51,680
<br />Driiling Contradar• baing ;526 1 a526 $526
<br />DrillingContrada-airspargepoints S8T6 2 $1,752 51,752
<br />DrillingContraGa-well 51,036 1 $1,036 $1,036
<br />CanneeWntosystem St,OW $1,000
<br />Soll excavatbn $24,280 ;24,280
<br />Ex nsea 5300 $3D0
<br />
<br />~enlury West Engineerfng
<br />TASKI SYSTEMOPERATIONIMAINTENANCE
<br />Assumptians:
<br />Padfic Environmenlal Group, Inc. (Padfic) pmvidad cost eslimates per fask (mostty wiThout unil cost details)
<br />In thek April 3,1997 bder to Chevron; thek costs were refortnatted to best fA these labbs -1a
<br />exampb, PaciAc reporled;13,600 fa'buaAeAy Groundwater MonNoring" and 518,900 fa "Quarterly
<br />Remedial System Monitoring," whkh were split beMrten Tasks I and II bebw. Unk cosl details provided
<br />by Chevran a Pacific are presented bebw. Pacihc's total estimated wsts to gain site cbsure was a62,975.
<br />.aba
<br />~artslequipment
<br />riilities ($1301month) 5130 60 37,800 37,800
<br />:xpenses
<br />TASK IIIA: ADDRIONAL CHARACTERIZATIONIREMEDIATION • UST NEST
<br />Assumptbns:
<br />Pacific reported "Installation of 3 additianal air sparge wells to system" fa 511,000 and "Inslallafion of
<br />2 groundwater wells" fa s3,650
<br />Locatbn o( air sparge wells on a oft site was not specified
<br />Collectbn and anatysis of soil a grcwndwater samples to delheate contaminatian was nW specified
<br />Paget DRAFT-CONFIDENTIALATTORNEYlCLIENTWORKPRODUCT
<br />Chev~on must inGude remedfatbn equipnent maintanance wsts (labaand
<br />parts) ia the Me year operating period.
<br />$1,235~qtr1a all quaRe~y air and groundwater mon~oring laba, field and ~ce
<br />expenses, and ~aylical costs appears m be nadequate.
<br />$3318TEX anarysb is not NoM Creek Anatytica~s standard rate.
<br />6 samples/quarter x 4 qVtyr x 5 years =120 BTEX analyses, not 20.
<br />Chevron will Gkey be required W deineate Ne extent ol soil and groundwater
<br />conWminaGon around the UST nest lo ohtain cbsure; their estimate does nM
<br />appear to indude sampNng and anatyses of soil and groundwater to delineate
<br />contaminatbn.
<br />Chevron's existing system will likey have to be extended to adequately
<br />remediata orf and ofi sile contaminatbn.
<br />29-May-97
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