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~• COURTHOUSE SQUARE <br />`,~ RE-CONSTRUC "' REMEDIAL AND CONSTRUCTION~RSIGHT ACTIVITIE <br />DRAFT COST ESTIMATE <br />. <br />Ge~,erai AssumpUons: <br />~ Sfte remediation actlvitles will be conducted prior to construction excavation <br />Rert~edial adivtties on fhe former ChEwron parcel are ~ot induded <br />1-level subsurtace garage will be construc~ed <br />Shc wiU be excavated to approx(mately 12 feet bgs for parldng garage; therefore, remedial soil excavations <br />wiU extend to a minimum of 12 feet bgs <br />Remedlal excavatwns wtU take approbmately 4 weeks <br />Units rates for contractors are assumed and will be replaced by bid rates <br />TASK 1 DECOMMISSION USTs <br />Assumptions: <br />The following Iviown UST will be decommissioned by removal: Uu Property <br />The following susped USTs wiii be investigated and decommissfoned by removal: Se~atodJr. Bootery <br />(mu~iple USTs?), Harbison Station, Senator Boiler, Beri Building (muftiple USTs?), St. Paul Rectory <br />Five 1,OOO~ai and four 2,000-gal will be removed <br />50 cubic yardsNST of petroleum-contaminated soil wili be excavated and disposed off-sfte <br />4 HCIDs with quantiTicatioNUST laboratory analyzed <br />Reporting included (n Task VI <br />~ ~ <br />Project Ma~ager 388 40 53,520 53~520 <br />Geolopist/Enpineer 3G0 120 57,200 37.200 <br />UST remoral 9 b13,000 313,000 ~ <br />USTinvestigation ~1,250 3 33,750 53,750 ~ <br />PCs excavation (cubic yards) 58.25 450 $3,713 53,713 -- <br />Soii transportation 521.30 450 39,585 39,585 <br />Soil disposai i31.50 450 514,175 514,175 <br />HCID/quantification analyses 5165 36 55,940 55,940 <br /> 3700 5700 <br />.s: r`•~;, ~ <br />rasK u: sou. ~MOVa~. <br />SoY wql be exaavated to appro~dmately 12 feet bgs for parldtq garage; therefore. rert~edial soA excava8a~s <br />v~iY e~Qend b a mWmum of 12 feet bps <br />Flve ar~s of Iawwn or wspeded PCs v~n~l be excavated: Senator lot, Beri lot, Beri UST, Senator lot sump, <br />and Goldber9 buUd~ sumP <br />5 HCIDs wrth qt~aMificatloNewca~ration laboratory analyzed <br />soa can,ple~ tmm 4 e~ocavation wa~ls ana floor + ~~ile (disposal) analned <br />Surt~p e~acarrattons v~ indude additional analyses (or metals, solveMs, PCBs (vraste compcx-ents) <br />Dewatering oo~ts inck~ded in Task IV <br />Reporting Mxkrded in Task VI <br />1.4 ta~s/CY for sdl <br /> <br />p~oJec;t Nlana~er 388 40 53~520 53~520 <br />C~~9~9~ 360 120 57,200 E7,200 <br />HCI~/quat~tification analyses 5165 25 54,125 54,125 '~ <br />Waste components 5424 2 5848 5848 <br />Soil overb~uden excavation (cubic yards) S6 720 54,320 54,320 <br />PCs excavation (cubic yards) 38.25 1480 512,210 312,210 <br />Soil transportation 521.30 1480 331,524 a31,524 ~ <br />Sail disposal 531.50 1480 546~620 546,620 <br /> s~oo a~oo <br /> <br />~~ry W~ ~p~~p Pepe 1 24Ju1-97 <br />