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HomeMy WebLinkAbout0275.092, - r- I .June. 4, 1992 THE HONORJ..eLE CI'1'"~ COUNCIL P~lo Alto, California 6 Airport. Tank Re;mov~l e.._nd C1eal1up Pro-iect. elP 19001 -A.ro.endment No. l to Consultant Aareement Members of the Council: Report in Brief This report recommends that Council ~pprove Amendment NO. J, in the amount of $98,000, to Consultant Agreement No. C-59292 with Emcon As~ociates at the Palo Alto Airport~ These funds will be used to establish a two year intensive ground ~ater monitoring program at the airport. Funds are available in elP 19001, Airport Tank Removal and Cleanup. In 1988 1 the city removed. three underground tanks from the Palo Alto Airport site. It was discovered through Fire Department inspections that some wastE:: oil had leaked into the soil and ground water from these old, abandoned fuel tanks. In J.9S9, Council approved Agreement No. C-59292 (eMF.: 451:9) ~ith Emcon Associates for $210,000 to provide technical assistance to identify the full extent and concentration of 'Waste. oil leakage and provide a remediation design for the airport site. The agreement also included preparing closure reports for fcur other tank sites and designing modifications t-:l an above ground storage tank at the Municipal SErvices Center. The agreement was later amended t(' ioentify separately the $193,900 cost pertaining to the airport. This was done to facilitate possible future cost sharing by santa Clara county. the airport operator. The County leases the site from the C-ity. In 1990, the initial monitoring indicated that the co~centra~ion of waste oil was essentially limited to the airport site~ Wi~'. this -1- CMR:275:92 L ,'." - informatiC'll'l, staff and consultants :met wit.h representat.ives of tr..e regulatory aqency~ Santa Clara Valley Water District (District) to discuss alternative remediation action plans. It ~as agreed that the city could proceed .... ith a risk analysis to detenr.ine the potential adverse impacts of not actively remediating the ground water at this site. In October 1991, Council approved Amendment Nc. 2 to ),.qreement No. C-S9292 (CMR:457:91) for $54~ 745, -whicn authorized preparation of the risk analysis. piscussion The risk analysis rE"port has been completed and recommends against any remedial action. According to the report, the limits of the ~aste oil leakage into the ground vater appear to be stable. In addition, based on ~odelinq results, removing the waste oil could take as long as 232 years to reach nondetectable levels of "Che.mica1s of Potential Concern" (CPC's) in the aquifer. The amount of money the City ~ould have to allocate at the beginning of the project in order tn complete its implementation could be as -much as $1,300,OOO~ Instead of" remedial action, the report recommends that the ground -water be tested for .. as·te oil migration over the next two years and that the case be closed if the situation remains stable. The risk analysis has been presented to the Santa Clara Vall~y Water District and is currentl~~ under review. Action by the District could range from concurrence with the risk analysis recommendation to aome form of remediation. The results of the District review are not expected until late summer. While the risk analysis .!s under review. the District staff is requirinq the City to begin "the t'Wo year monitoring program in June 1992. Twelve ~onitorinq wells i 'Which were established during ths initial investigative \rr{Qrk, .... ill be used. The ground .a.ter level will be :ne.3.sured every month, and samples will be taken every thr-ee rlOnths and analyzed for petroleum hydrocarbons {gasoline, diesel, benzene, toluene, xylenes, and ethylbenzene). Attached Amendment No. 3 for $98,000 "Will fund the follo'Jinq Monitoring program: • Sample and analyze 12 monitorjng wells on a quarterly basis for two years ($60,000). • Measure ground 'Water le-/els for t .. o years. Water levels .'ill be collected during the months when quarterly monitoring is not scheduled ($6,700). -2- CMR:275! 92 i i ! I - o • Prep~:re quarterly monitoring reports and one final report (S31,300). Quarterly monitoring reports will be submitted for two years to th~ District. while the ri.50k analysis is under review. Per District revie~, if the coursa of action differs from the two year monitoring progr~m outlined in this staff report; a corrective plan will be presented to council. Environmental Assessment Adoption of Amendm~nt No. 3 to Agreement No. categorically exempt from the California Environmental (CEQA) under-section 15306 of the CEQA guidelines. Recommendation C-59292 is QuaIl ty Act Staff recommends that council approve and authori~e the Mayor to execute the attached Alner.dment No.3, in the amount of $98,000, to Consultant Aqreeme,nt No. C-:'9292 with Emcon A~sociat2s for add.itional services for the Airport Tank Removal and Cleanup Project, elP 19001. Respectfully submitted, h, /~~_ / .' 4i, -,.~ jZ)f.JV' GEORGE BAGDON Assistant Director of Public Works Related CMRs: 451:9, 457:91 -3- CMR:275:92 L .>,' .. JUotENDHENT NO~ 3 TO CONTRACT N':i. CSSl292 BETWEEN CITY OF Pl\LO ALTO A...'lD EKCON ASSOCIATES FoR PROFESSIONAL CONSULTING SERVtCES Tr'IS AJ'fENDMENT to Contract No. C59292 is made and entered into this _____ day of June, 1992, by and between the CITY OF PALO ALTO, a municipal corporation of california, hereinafter referred to as IICITY," and EHCCN A.SSOCIATES (Taxpayer Identification Number 71-0283274), 'With offices at 1921 Ringwood Avenue, San ... "'rose , CA $5131, hereinafter refe~red to 35 "CONSULT~T~; WHEREA.S, Contract No. C59292 .... as previo·.J.sl~t entered into between CIT)' and CONSUI.,TANT for the prov..i.sio .. of engineering and design servi ces for CITY' s ait""port underground tank clean-up and municipal service center fuel tank modification; and WHEFEAS, the parties EdY agree: to amend said agreement from time to time; NOW, THERErORE 1 in con5idera~ion of their mutual covenants, the parties hereto aqree as fo110'.1'5: SEQI2.J..9J!_.l· The' first: par03graph of Section 7.1 of contract No. C59292 is hereby a!'r'.ended to read as (0110\0'5: '"Tn consideratior:. foz:-the full perfonr.ance of the Basic ser~ices and Reimbursable Expenses described in Sections 4 and 7 of this Agreement, CITY agrees to pay CONSULT~T a fee. not to E'.xceed Three Hundred seventy Thousand r Three Hundred Se:vent)'-nir.e Dollars {$370,3.79), an increase of Uine.ty-eight Tr.ousand DolL?Is ($98,000) o;.ling to Amendment Nurr.ber 3 to this Agreement. SECTiON 2. Exhibit ".A" to Contract No. CS92";12, as amended by ~endment No. 2 to sa~a agreement, is hereby fUrther amended to include additional tasks under Task 4 as set forth in Exh,ibit ·A" attached to this AJ'r .. endment and inco.r·porated herein by this reference. SECTION 3. Exhibits nB A and ~Bl" to Contract No. C59292, as amended by Amendment Nos. 1 and 2 to said agreement, are hereby further amendee as set forth in Exhibit ~B" att.ached to this Amendment and incorporated r~ersin by this refer .. mce=. SECTION. .... 4... Exhibit "c H to Contract No. C592S2 is hereby amended to i:"ead as se"t forth in Exhibit "en attached to thi s Amendment and incorporated herein by this referenc~. SECTION 5. Except as herein modified, all other provisions of and ~xhibits c:.nd amend':\'.ents to said agreeme.nt shall remain in :full force and effect. 1 L - IN WITNESS WHEREOF, the parties he~eto have executed this Amendment the day and year first above \rIritten. Arl'EST: CITY OF PALO ALTO APPROVED AS TO FORM: senior Asst. City Attorney APPROVED: AssIstant City Ma!1ager Taxpaye,r Identification No.: '17-0~3.d/1 Director of Finance Risk Manager APPROVED }.S TD CONTENT ~ Directcr of Public Works Attachments: T2'sk 1 (Amended) EXHIBIT ttAn! EXHIBIT fiB'": EXHIBIT lie" ~ ~ended Exhibits Band B1 Insurance CCNerage , • - CONTRACT CS9292 TASK 4 {AMENDED! UNDER EXHiBIT A ~ ._---., ~ -~ ---. Tas.k 4 Of the Scope of "Work !isted in Exhibit A of COfluact C59292 with Emccn Associates is amended to read in fiJll as foilo .. vs: TASK ~. MO;"1ltoring VJeli Installation, Quartedy Moniwr:ng and Reporring for the MAS A. Part 1 -Weil Installation ana" Initial rAonjtoring Based on the concentration of pet,oleum hydrocarbons defeCted in tr.e three Phase I ground-watei monjtoring welis, additional ground-water monitoring welis \<,\'il: he iequ'red ':0 determine the lateral extent of petroleum hydrocarbons jn the ground water beneath the site. EMCON!s assuming that up to four additional ground-v.'ale( monitoring welis will be required and that the Santa Clara Va:ley \/I/ater DisHier jSCYWD) and the Reg'(1n61 Water Quality Contred Board (RWQCBi will req'Jes~ quarterly samp~ing, analysis anc reporting. Selection Of four wells assumes that the extent of existing soil and grOund-wate, contarnlnation is close to then defined in the Phase I site assessment work (Results of Site Assessmen~, Palo Alto Municipal Airport, December 28, 19881_ To meet these object'rves, EMCON proposes the following rasks: • Select up to four locaticlns for add;t~onal g~o'Jrld water mor.;wring 'Ne1ls using the da!a del,ie~op€,j in Task:s 2 and 3 • S'Jbccntract the we!J drilling to a crilling contractor (s'Jper· ... ised by an EMCON georogistj, .and purge arid sample the welJs • Analyze the ground-vli'ater samples for gasolil18, BTXE, diese~ and rotal leaJ • Prepare a summary report to document instaliation of the additionar weils, present and evaJuate trle analytical reslJrtS, and recommend additional work [rf necessary) • Conduct quarterly monitorjng of the monitoring wells !up to sev€r, wells) 0'1 the siie for 1 year • Anal'y'ze the quarterly ground-... vatef samples for gasoline, BTX£, diesel end tota1 lead L • • Prepare quart€rl'y' repor'ts docllme~t',ng purgi:-Ig, sarnpirng, (',<',d ar,a!ysi" techniques and the ana;ytrcar results ~or sr...:bmission to ~he SCV\,VD a:ld RWQCB Tne City wi!1 be responsrble for the d;,spos<;.tl of dr;l! cuti.:ng frC'~ v'II'ell construction and purge water from \,Nell deveioprner;t. Purge 'Ndter disposal \'I.'i!! be address~d in the contract documen: specifications d8".'eroped in TasK 6. B. Part 2 - 2 year MonitN:ng Program All wel!s shown rn ffgure 1, r,,1W-' through r~,wv-' 2, wili b,~ sam;Jred Quartpr!y for 2 ~'ears, The sarnplir,g E''1E::nts '~·"I'I'I take p\ace in r,l'arch, June, September and December with the first event taking piace in JUi'.e 1992, During each sampi':ng event, ground­ water leve!s wiil be measurEd in the 12 s.;te we!!s and the v"!e~!s purged \/vith a balle, unt'I'r the temrerature, electficaJ cond:Jctiv;ty and Ph hJve siabililed. After 4 casir'lg vo!umes have been purged fror.. each v.'e l,'" 'the g~cund water wiJi be sarTIDred. Samples vvi!i be decamed inro cOlltainers app!Gved by ~Jle U.S EnvironrTien!aJ Protf:ction A~ei,C')" iEPAl. stored on ice and transpon€d wilt". chain-ot-cus!ody documentation to a stat,e ce:t'lfl€d laborawl"l for anaiys.is. Sampies wW be a,lalyzed for to!al pe!roieum r,'r'drocarbons 3S gasoline [TPHG) (DHS LUFT methodl, Tor TPH as diesel (TPHD) (DHS LUFT method). and for benzene. toliJ€:1e, tetal xy1enes. and ethylbenzene (BTXE , [EPA meth~ 8020). The sarnptes from the ftrs! quarterly event will also be a~aiyzed for total oil and grease {TOGi ['EPA method -413.1 I. and for volati!e hydiocarbons iEPA method 8240) in accordance wi~h table 2 of the Tri-RegionaJ RecDmm.enda!;ofls A:1aJysis "vi!1 be cor';"~p~eH:d withiil the appropriate ho;d~!"g times. One field b:ank arc (li'.e o'up:rcate saiTIp',e wlli be aI:alyzed during €dch quzrteriy e'J€n: The fie;d bla'1k w:.'i be 8tJcl'{ze-d fer TPHG and 8TXE. The field dupl"icate sample .. "\,;,1 be cnalyzed !(., tr18 ~de'l~ical sUite of compounds as the prirlary sample. Puroe water generated during sampling of each vlei, ..... ill be stared !n labeled, 55· gallon drums on s;,te, to be: disposed of by "(he City of Para Alto. MQDJ.hly Ground-\Y51.e.r Levels Greund-wa:er eievation data Will be collected mOinhl,y at the Site to moniTor char:ges. Water !evers wi!i be collected during the months 116 rotal) when QuartNfy mo~'toring events are r;ot scheduled starting in Jul',' 1992. Vl\J!er levels w/ij be coliected at all 12 wens shown i;1 figure 1. Tne data wi'li be evaluated and comp'l!ed for future referer-ce into a table v/hich summarizes the 'h'ster-level elevation data and grounc,­ water contour maps ..... dl! be prepared for each monthly dsta set. -~ , - --~~--------- o Prepare Reports following receipt of the ar,aiyses for each qua"rterly sampl:ng E'vem. a 1echnicai re.tt-er report will be pr€pared to lnclude the documenta!io;-, :equtred by the SC\/VVD, as fajlows: • sJte p\ar:s with monthly ground-waier contours and gradie.nt • le; boratory results, co pies of the ce rt,fied ana rytica ~ repa rt'S. cha rn-of-c ustod y forms. field date sheets, and a descriptior, of sarnple collection procedures • compa:ison of iT1orlitorirl9 results with resuits predicted by risk assessment models, particularfy with respect to contaminant migration and 'Impact on receptors or ber;eficial uses .At "the conclusion of the 2 year monitoring pericd under this Part 2 of this Task 4, consultant will prepare a comprehensive report sUr.imarizing the dots accumulated during the two years. n",e technical reports wilr be based on the DIstrict's Guidelines for Investigation and Technical Report Prepara~/on, (revised Oetobe;" 1990: c'ld on the report appendices. including the Tri-Aegional Recommendat/ons. Incorporated into Task 4 is the anBched figure 1 showing we:1 'ocatic:"s and fiffJre 2 sl"1.owing t!"1e project schedure for Task 4, part 2. L . -., , I I I :1 : -- EXHiBIT 81: EXHIBIT 82: EXHIBIT 83. TOTAL CONTRACT C59292 EXHIBIT 8 (AMENDEDI PALO ,o.L TO ."-IRPORT (Refer to sLJrnmzry be!o\,o"vJ MSC CLOSURE REPORTS (Refer to sUrTlmar'~' beiow) 81: PaiD ArLe Airport i=ee Summary Original $344, i 39 $9,950 $370,379 Corltra~:t A me nd iTH?r'l AmenO!Tlern Ser'vices Amount 1 ..l'{u m be r 2~ Basic $191,394 $ 54,7 4 5 Additional $ 2,006 $ U Reimbur.sab!es i_oDD L~ Totar $193,900 $ 54,745 Consultcm's Schedl ... ie of Charges :s 2:ttaC~€d 1. Includes Alternate' 2 Fl.fsk Analysis 3. 2 year monitoring program 83: Closure Rep'Jrts Summary Original Contract Services Amount Basic $ 6,150 Amendment Number 2 $10,140 Number 3 J $ 98,000 $ 0 .L Q $ 98,000 Amendment N~mber 3 $ 0 -';{J~0jrL . -0:'-t,\' New Com:ract AmOun..1 $34".139 $ 2,006 $ 5QQ $346,645 New Contract Amount $ 1 6,290 Pagelof2 J ; j ·.t 1 -.,' CONTRACT C59292 EXHIBIT B (AMENDEDI SUMMARY OF PROJECT COSTS Contract Amendment Amendment i Amount Number 2 Number 3 EXHIBIT 81; $5474~5 ! Palo Alto A.irport $191394 $98,000 _,_. I EXHIBIT B2: MSC $ 9,950 $ G $ 0 EXHIBIT B3: 1--Closure Reports $ E,150 $10,140 $ 0 --I -~- BASIC SERV1 CES I IS1, 82, 83) TOTAL: $207.494 $64.885 I $96.000 ----- ~-nONAL SERVICES $ 2.006 $ 0 $ 0 ~- REIMBVRSA8LES $ 500 $ 0 $ 0 ~ ----~-• S210,000 I TOTA!:J $64.885 $98.000 ------------~- -.',- New I Contract Amount $344,139 --- $ 9,950 ---- $1 E,290 $370.379 $ 2.006 $ 500 $372.885 i Page 2 of 2 - o CONTRACT C59292 EXHIBIT B1 (AMENDED! ---" CONSUL TArn FEES FOR PALO ALTO AIRPORT SITE The fees for the abo .... e scope of work shall be as follows: Task 1 -{Pan) Closure SUrrlr.lary Reports for Tank Remova~s • Pa~o Arto Municipal Airport Task 1 Tota! Task 2 -Records Review (~1·..Jnicipa! Airport Si~eJ • Review and Heport • Meetings and Carnrnun;cation • Amendment #2 Task 2 Totar Task 3 -Soil and Ground-Water Characterization (MAS) • nFounh Tank" Investigation ~2 daY's) • Fietd Investigation ~2 devsi • Mobile laboratofY field SamplJng and Analysis {20 anaiyses for gasoline and BTXEj • Sa:Tlp~ir.g and Anaryses fer gc$c\;r,e {10 analyses for g;;:sollne,. 9TXE. dieS'Ed ar::d ieaC:1 • SummaiY Le::~e: Repon Task 3 To'CaJ Task 4 -M0n1tor;ng Well Installation, Quarter!y MO'1~toi"lflg and Reporting {Munic~pal Airport S:te) Part 1 -VJerl Instaiiation and Initial Monitoring • Field Activities (im.:.al!, develop and survey document fou~ 2-inCI1. ·.".'E.i~SI • Quarterly S~mpling (seven weHs, four Quarters) • Quarter!y Anarysis fgasui:.'le, BTXE, diesei and lead for seven weils, fow quarters} • Quarterly Reports J;L325 $ 2,325 $3,3i5 1,518 54 i45 $59,578 $ 3,128 3,794 6,900 4,655 _665.± $25,131 $17,438 13,548 15,970 5,664 Page1of2 .- -. - o Part 2 -2 year rv!onilOr-;ng Pr~giam • Ground VVater Sampling and Ar>a!ysis • Monthly Ground \Vater Le\/e~s • Prepare Reports Task 4 Tota; Task 5 -Define Cleanup Goa!s and Evalua!e Rernedia!­ Action Alrernati\,les E\laluatFon (MAS! • Ground-Water Cleanup Definition • Evaluation and Report • V,fell pump test (1 test) • Ground-\'\'ater Analyses for blotreatment testing ISee table 11 Task. 5 To~al 60.000 6,700 31 ~OQ $150,620 $ 9.500 20,750 12,000 4.800 $47,050 Task 6 . Remedjal-Action Design and ConSHuction MOI.i'tOring (MAS) • Grou:",d-\'Vater Extraction System Design • Construction Specifications and Plans • Water Discharge Permit ASslstance • Construction Monimring and Start-up • Construc!;on Meetings • Post-ccnstru,:::tio:l Report Task 6 Total • Treatment S·ystem Design lif required) Task 7 -Meetings Regulatory Agencies (MASI Task 7 Tar.d: TOTAL $12.100 10.700 1,700 10,485 2.570 3000 $40,955 $15.000 $ 3 480 $344,139 Page 2 of 2 'I I ~ j .j .. ,- ~il:M~""W:"5:"''''''i n A04.1~1t. CERTifiCATE OF INSURANCE Rol! i.,s !5urd~tk H~ntll:(~NQ c. r 2"50S:S Eut Ihys!1::or1 &o,":elflrd P.o tao)( 51110 p,rQ Aj,~. C~ 94J03~325~ ·;'S-BSo6-650C 1 ...... --------- - EMCON A$S6c;,tt$ 1r21 Ri~9wood Av~n~e Sin J~H" c. Cit)' cf Pilio Alto. [l1!!F':IIrtme(!1 of P~blic \II~Tk$ 250 Hu.i I tor. Ava Pillo IIlto, CII 95301 A1tI'l: JIIIlI!!S Hllningto,rI ~COIW1$-Sl7lt:C)' , L ',.aoo,OOO/CI:lli~ "1.000,000 A;g 5HO Ul.D ... 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"\ C,) '--.-- ___ J" c) L'"M~" Cj r.:: .... SARCADAAO --.. -----------------~,-- Scali' a rOO 200 r,al L---~ __ ~ ____ ~~ ~ em(On I@tAssocio-' ':;, li, MW·fl ,;J MW-] fAW-9 ® ,'!}"-(W-IO crrv OF PALO ALTO PALO ALTO MUNICIPAL AIRPOriT r'ALO AlTO, CALIFORNIA WELL LOCATIONS " '~~1'1''!I'''~ ':. .... -.. ~ .----------.:.-- ") ,~ EXI"LA,NAnDt-· "fovn<j-ffllrer monltOflnljl ... 11 Ii ) /I!", ",GUR' I ------1 i ""'~, " 199-08.06 ! ~ , --~, ; .. " i ~ t , ," • ~"~ ... -- ---• ,~ .~ ~ " p~ ~~ I. " I~ !~ , ,. ~ ,~ i ! i , .--"1 ~=--'-.-.- I:;; ,1.-,< ... :~ [~ i i j ~ : J: "S i:" i -- I - I~ ! :i if. i"::: I 1 i '~ ~ I' ;& • ',i ,e ---l I I --",' '.-~,,',',"',' --I I I I I I I[ i!~ I§ \~ :Ql. I! !~ ;~ ~~ cO ' ;: !ii ~ , ~ II !~ Ii ,~ i~ ij i'-,~ • ~I i ~ 0 _ ._ 111. ___ ,_,,:, - .. '--,,--. -. /. fl,~1tJr-~.:.:'·""'_"_k_~~~"''''--¢''"--'''~'O/-"'-:.-... ; ..... --.,-,-~ \ i, - e emcon "S$OCIAT!!'S SCHEDULE OF CH~.RGES PERSONNELC~iAFiGES Senior Executives .. Exect.r..ilfe Manage:'s •• " _ ••.• Project Managers .•...... ~ •. Senior Tedmicar St..aff. , •.. _ . Certtfied lndllS!!'iat Hyglenistsi'Toxic:Jicg-ists > Technical Statf . _ . Technical Samplers/Re'd Technicians. _ < ••• , •• Oratt<ersICAD Operators •.. , ... Teo"1n.lca! WctterslEdltan, .. Projed. Asslstanls ..... ~ ... __ . SchedulersJGocrdir\ators ..... _ .... Non-Techn.i~~ WI),{d Processors (includes equipment} . SecretarieslCI-erical .. CONtact Adminis.trators. . . .. _ . _ Acccunting Clerks ...... _ .. _ .. _ , Reproduction/Printing. _ Efi"ectJve Ja.nua-ry 1, '1992 Rate Per Houl ... $130· · $1 00 - . ... $87 . .$87 · $87 . , $55 .S35 .$63 · $50 $S6 $55 .~s $32_ · $4< S3S · $32 140{or- 132lh{ 122Jh, 12210' 122./tv g9lhr 57ihr B9/!1r 69/!1r G9lhr 69/!1r 5Cfhr 5011lr 62"',\ SD.'l"'.r SQ/!1r Depos;,ticns ana Expen'Witness T~s.t;mor:i. Ir.ci!JO',r.g ?fep2ra'!0:"1 time, \Hili be c..hargelj a~ 150"/" ol '~e above Tates_ Travel Tlme ...... m be c!':arged in accordance with 1he above rates. up to a maximum 01 8 hours per day. DIRECT CHARGES Xerox ReprOduction. per sheet _ Auto or Pickup Tr.Jck: per mHe ..... 4 -x 4 Trucks per milE ...• _ . _ Blueprints per square tOC! .. Mylar per square foot. ~ ... _ .... _ .... __ _ Fax per page .............. . Storage of sampres per month per container ~ . Disposal per con taine r .. _ ,. . _ . . . . . $0.15 $0.47 .$0.58 . .$0.13 · .. 51.50 · .. $3.00 · ... $S.oo .. $50.00 "A conlaifieris defined as a standard core be)', a capped Shelby lube. or a sealed five garlon bucket ADM WCPSC..lMW Form 0-2 R",",. , 192