RECORD OF DECISION, OPERABLE UNIT ONE, REEVES … · site, if not addressed by implementing the...

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RECORD OF DECISION OPERABLE UNIT ONE

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Reeves Southeastern Corporation Site Hillaborough County, Florida

STATE?-g;N7 OF BAi;IS AKD ?\jRP.'Q^?,

This decision document presents tha selected reraedial action for tha jRi2eji as..Scuthaas.'carn_',(:.orpOi;aticn .sits. in..HllAt:-fcorouoh Coujity?. .

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The State of Florida, as represented by the Ficrida Department of Environmental Recpulation (FDER),. has been the support agency diiring the Remedial Investigation and Feasibility Study process for the Reeves Southeastern aite. In accordance with 40 CFR ."jOQ '"-30, FDER, 'd . th'- support agency, has provided input during thiii- process. B - L: onn comments received fr :'. '')ER, it is expected thet cor.j:ar-.-iice will be iorthcoming; howciver, a formal letter of concurrence has not yet been received.

ASSESSMENT OF TKE SITE

Actual or threatened releases of hazardous substances from the site, if not addressed by implementing the response action selected in this ROD, may present an imminent and substantial endangerment to public health, welfare, or the environment.

DESCRIPTION OF THE REMEDY

This operable unit is the - J-rst of two operable units planned for the site. The first operable unit for this site will involve the remediation of the soils/sediment on the site. This action will address the principal threat by solidifying/stabilizing the contaminated soils/sediment.

The major components of the selected remedy include:

o Excavation cf approximately 6,000 cubic yards of contaminated soils/sediment

o Ex-situ solidification/stabilization of contaminated soils/sediment

o Onsite disposal of solidified/stabilized material above the water table and capping.

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c .Df .Yiuren hoalth and the ai end state reqxiirements that nt arid appropriate to the ective. This remedy utilises iva treatiEont technologies to the

The selected reniedy is prcrectiv environment, complies with Feder are legally applicable or reieva iiaiedial action, and is cost-eff permanent solutior.s and aiterr.-=3t, maximua extent precticable and satisfiss the statutory preference for remedies that employ tra6":.sient that reduces toxicity. mobility, or volume as a princip wiil not result i n hazardous suJs heQlth-based IpveiSj the fiv?-ye

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8 . 0 SUMMARY OF COMPA.fJATIVE ASAti 'SJ.S OF ALT!-:!iNATXVES 35 8 . 1 C r i t e r i a f o r E v a l u a t i i t g Rmmed ia l A l t o r n a t i v o a 3 5 8 . 2 T h r e s h o l d C r i t e r i a . 3 6

6 . 2 . 1 O v e r a l l P r o t e c t i o n o f Human H e a l t h a n d t h e Environmon t 36

8 . 2 . 2 Corrpl iance w i th ARARs . . . 3 6 B.3 P r i m a r y B a l a n c i n g C r i t e r i a 36

8 . 3 . 1 Long-Tenn E f f c c t i v e n a a a 36 5 . 3 . 2 R e d u c t i o n o f T o x i c i t y , M o b i l i t y o r Vol-.ime 3 8 8 . 3 . 3 S h o r t - T e r m E f f e c t i v e n e s s 3 8 8 .3 .4 I r r p l a m e n t a b i l i t y 38 8 .3 .5 Co.tt 38

8.4 Modi fy ing C r i t e r i a JS 8 .-i .1 S t a t e A c c e p t a n c e 38 8 . j .2 Community A c c e p t a n c e 39

9 .0 SELECTED REMEDY 39

10 .0 STATUTORY REQUIREMENTS 41 1 0 . 1 Pu rpoae 41 1 0 . 2 P r o t e c t i o n o f Haman H e a l t l i a n d t h o E n v i r o n m e n t 41 1 0 . 3 A t t a i n m e n t o f t h e A p p l i c a b l e o r R o l o v a n t a n d

A p p r o p r i a t e R e q u i r e m e n t s 42 10.-i Cos t E f f e c t i v e n o o B 42 1 0 . 5 U t i l i s a t i o n o f P o m i a n a n t S o l u t i o n a to C/10

Majcimum E x t e n t P r a c t i c a b l e 43 1 0 . 6 P r e f e r e n c e f o r T r e a t m e n t a s a P r i n c i p l e E l e m e n t 43

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5 9 OuGi. RECORD OF DECISION; C?ER^3L^ 'JNir ONE

REEVZS S0UrH£;^-5TER>; CORPORATION SITE HILLSBO.ROUGH COUNTY, FLORIDA

0 SITE NAJÊ, LOCATION. AND DF.SCl-^T'^TIQN

The Reeves Southeaster.". CorpDratio.n Site is located in central Hillsborough County, Fiorio'3. The aita consists of -wo facilities located across tha road Irom each other: the J7.36 ?.',:xs iie^<fv''7.K 5o;>,c'h.;-£.-;t.c;'i, G:.iJ.var:ixiT'.-i7. ;3SG) .vC.cJ-l.,it.y on tho north ;.:.i.4Q O'I: St&te F.'-iil ( S A ] t l ' i 6.ppro..slir« to ly .12(10 i>?ei: w:>cz o i

:.•:^Xlio;:C.:\^y :i' '!:iii.iiy: cf.-'. T'". W ..(i"'.{rmr- Re- .'-e Soiitht'eat«rn VJirs (S'.VW) facility iocateo. on 'iht lion-ti'. jida 'J:-.: J,-. :•'!'--. ^\iî,iÂ}.:;..:•-: '...'j '„/.'• feet vjest of Faulkenburg .Roed. Tv/o additional Superfund sites p.ra located in the a.rea. These are the PeaJc Oil sito, which is .lccu-..i->'i.-.-,...i-: .i»--., ;•,-• .^•••:.r: r; .'• t h o 5-^; flicllxt:.''/ -r-riC; tl'JG Sa^^ Dnim-s s i t e , w h i c h i s l o c a t e d ijiunediactiiy nci.3L .ji' .:-:-.• T"'-.-;!"; 0:,I cite.. Figure 1-2, taken from the Reeves site source characterization Feasibility Study '^FS), shows a map of all three sites.

Currontiy, the area north of the SEG facility is Sabal Industrial Park, i.K development containing various light industriai and of LLC" buildings. The area south of the Reeves site is generally u.idi^vcloped, but does encompass about 4 00 acres owned by Hillsborouqh County t Y - : " contains a wastev/ater treatment plant, a solid waste resource r.': ...' tacility and an area des;'mated as the potential location c . . .-.' jail,. Th';rri is no realu^ .itial development in the immadiat'': vicinity tl'o nearest being .25 miles east of the SEW facility. According to the Official 2oning Atlas for Hillsborough County (1985), the Reeves, Peak Oil and Bay Drums properties are all currently zoned for light manufacturing. Ali o t this .information would indicate that it is unlikely that the future use of the property wDuid include residential development.

The largest building, on the SSG f&cility is whsre commercial steei products are pra-trea,tad a.nd galvanized. There is aiso a small office build.ing and maintenar::s shed, A 300 gallon tank situated in a small rectangular ~.-.ea in the northwest corner of the maintenance shed wa.g used in the 1960s as a wastewater catch basin during electroplating. Two inactive liquid v;aste percolation/evaporation ponds are located in the north-central part of the property area. A waste-water pretreatment facility and a double-lined storage basin for settled solids are located on the northeast portion of the SEG.

The largest building on the SEW facility is where steel wire is drawn, weaved into chain link fence, pre-treated and galvanized. The smaller building on the facility is an office building. There are three former percolation/evaporation ponds: one on the

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2.0 SITE HISTORY AND ENFQRCir::'l-y:NT ACTIVITTES

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The SEG facility waa originally bu.vl Plating and Galvanizing Company in t facility was .TCq\t;. r< d by Metnl Zo-iti the Southoastern Galvonizinc: Corpora internal reorganizations, Houtheaats became the Southeastern Division of Corporation., the SEG faciiity utill , a;:-C0l -*LiOr/:;V..ii';5--.v-'o.: Z' .i/.: ^ X'O,':' th ... „ "".afc?". ••'"''arri-ed to t;Jv5i.r p. -cssent vy'i'oh' b ' ' l.:iiinL3 ^iC-.:,-^vLili:-".._," •"•".;••" -J^ ' . - , ' . C-10'.. The ponds were used for dispos until 1982, when the current V7a3t<?,vv'a

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The SEW facility •..•:•= originally built in 1955 and operated by Florida Wholesale Fence, Inc., a subsidiary of Reeves Fences, Inc. Throug.h two ^lergers, Florida Wholesale Fence became the So•• ,hL>a5tern Wi.re Division of Reeves Southeastern Corpcration. T;:. .; • irst percolation/evaporation pond for disposal of SEW's wa^t.^..jter was built irj 1955 and was used until it was backfilled in the- li'i;r' ;'}50G. J.". ' • •:-''P.sic'.3 were approximately 75' long and 25' i;..;- ;j.id vrah: '. long tha centrr^l wr;'.,tor-. .a^dnr of SEW. A .'jccond pOiid \:...:, 'vcr.nd rir.'.o- i n ).9fi!': i! -. subdivided in iDTf. to torn-, Uho two curro'.it ponds in the southwest corner of the facility. Both ponds are approxl.T;ateiy 35' by 35".. &!;>'. ti:::? irii;T:rc;'Jx::?. by r. 3' b- rin. The ponds were excavated to a depth of 3'. Discharge into these ponds ceased in 1980 when £Sff began using its v,w.3tewater pretreatment program. Discharge from this facility a.lso goes into the locel POTW. . .

Xh^ U-.S., 'SPA t'onductiHC'. e Tt.ii; .'.nvestig.'stion in i99i that .' . indicated elevated itistal levels in surface vjatsr and groundwater at the SEG facility. Subsequently, the Florida Department of Environmental Regulation (FDER^ conducted a survey of the types and magnitude of chemical contamination at SEG; this survey resulted in the 1982 placement of SEG on EPA's National Priorities List (NPL). Reeves contracted in 1985 with CH2MHill for a terrain conductivity survcy utilizing electromagnetic induction technology to be performed at both SEW and SEG. The results in.dicated a possible groundwater contamination problem in the surficial aquifer underneath both facilities.

In 1988, the Reeves Southeastern Corporation and a group of potentially responsible partie.-i (PRPs) for the adjacent Peak Oil site signed individual Administrative Orders of Consent (AOCs) to

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:5 2t thti Bav Drums site. In addition

por'orra aourco -hardc,'.:r.'.z.:t:.;..". r.- ~.'.-Foaoibillty Studios .'RI/FSf.' at thei tha AOCs, the Peuk Oil y?.T-s agre ?-::: t characceri:!;^tion Rl/r-'i ::- tr.e Southeactern Corp-;rat;. •. v.-:.;.. RI/FS at its SEG and SF.'. source charscter.'.zation R to the source control .RI/r53 h^ing conducted by Reeves, thc Peak uil PRPs a n d EPA, the Pea;-: Ci." - nd Bay Drums PRPs and thci Roeves Southeastern Corporation agreor' in a sfoerata AOC to pori'orm an arcii"',s'L':».o .;;rn(.'i'T;wTnor P.T-'. ?. ""h'* rr*pu.lr,.-T o: tho groundwt'.r.or Ri aro detailed in i-hfl "A-t-oa-Widc hydx*u.lci{u<: Jciv.j-'di.''l •y:»\voRt: lc. .v< «n anci Risk Assessment", Ccnonit" Ei»viior.:.iiGUtal, :i,<ic., iyi*:*; ui%u »• ..j.-. be addressed in detail in a separate .Record of Decision. There is ^Iso^fi WST.lands impact dtudy bei.ng perfonned by EPA on

. - i i : ' r . j . c ihUi : ';.-}v-!h t:'";.- ' .LiS! ' . : .yti p o z ' n e :<.,.)^'S'r: t : l Lhe: c ] .-.i.'.i- -jI'x.'^'.-^--• - z.h<: .i r^ - ' - sv . ' i r . i ' . Q i ' -feiii;.'- ut-uo,^^^ '..•.. l:. alt't> " ^ -<-~i.vi;..-;irjt' > r. c aopr::r'i3.-Lc "'••.,'?>.

3 . 0 ' H I G H I , T G H T S O F CQi'ii-nJWYTY PA^TTCrVAI'iruJ

C o K w u n i t y r(^ l.at !'jn;; fo.r i..ri(.) Mjuv.-ai .y..;.o ...:.•., :,.•>• -..Jiv. m^v^;; P'.i,'"'., , beon h.-indled ii- c:onjuncMon with the Peak Oil and Bay Drums sites Interc'. n the Reeves site itself has boon minimrtl-'What community i.nterest that has been noted was focused cn EPA activities at the other two Superfund sites. This is probably line: to the removal at Pea.k Oil, where contaminated sludge from a I . )On was incinercitftd, and the removni at Bay Drums, v;herG a Li. jO -.Til,: o t rnoi'Lr..'! shingles had to be removed from the site in ord'.ir 1 • ..i.'iiuuct i' '''F.I. The 1989 Community Relatj ons P.Ian, prepai jy Bever.l" EPA, states tho folio--

"Community involvc:;:.»nt at the Bay/Peak/Reevcs sites .has been minor to date, judging from responses during interview:* of local environmental agency staffs. Agency personnel from the Hillsborough County Environmental Protection Commission {.•aeEPGV,,; i,.,.!T.sthw-?Bt Ficrida Water Management District (SWFWT-ID), Tampa Say Regional Planning Councx:l (TSRi'a}, and Florida Department of Environmental Regulation, Southwest District. *'FDS?,-S';'?D) '.''srs contacted to ascertain the nature o t coi-.irf'.r 'nto or comp;'aint© x e c B . i v t ^ d c'; r.hocso a g e n c i e s , iijo .

.'..cvS-rmiil coi\iTJ.F,\;li}ti: -jr .\i(au.i„i:le'.j wc're Q n rcco.rcl, how.-}vt:<r tJiorci •hii-'/Q btion cchcvirvi.'/<.'>vu:' dho .ci5.'jpbiji'ti,on n', thcj roclihg ' debris on the Bay Dr-M site.

Elected officials or their representatives displayed general knowledge of the sites, .but overt concern within the community was not known to them. General concerns associated with groundwater contamination and hazardous materials were referenced frequently by officials, but nothing specific to the Day/Peak/Reeves sites was presented.

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.Many national and regional er.vironjientai organizations, such as National Audubon Society, Sierra Club, and National 'Wildlife Federation, have local groups in tho Tampa-St. Petersburg area. Local e;'.vi3:on,T,ent?.i organizations, s Brooker Creek Preservation Society- ."ânasota-es, and I Wclton League, aiso havr, ir.rerest in situation similar the Bay/Pea'yt/Reeves sites. Specific interest in the 3ay,'?eak/.Heevns siti-a by any of the natic:-.ai oi •..;;•..•;:_,. o.rganizatians has not been identified at this time. C with the organizations usually has resulted in a reque be notified of public raeetings or issuance of public documents.

•, •. Con!: .ct"vi.tl' ••'-?; " 'ia.Tdicr! q.r-r? C r.'r.b'?r of Commerce, did. not., . . ,. .r.eve-il sg>ecific cc:iC3rns. ih i= i-riirvjc-jj cHi-.-rJr'er. C''OC-:-;J .'icve .-.

•;• '.--'.i.::••. ;••;•'.;'•.';••".••*;'•"•::-;•" '.- .r'. '•'~.''7.i-:iiGS .an?;ooi.ared •wit.h. .• ivater,. wastewater/ ano jitiiai'tiJ.-. .tV.i, ..•..•'._.:.,.; . ;.M.; r ' - .;'

In the time period between the preparation of the 1939 CRP and the public comment period for the Reeves RI/FS, no significant cc'îmunity interest in the Reeves site was noted.

'VI. Source Characterization RI/FS Report and Proposed Plan for v-hL '('••'.-c:? Southep.st'-^rn Site were released to the public in Auguo;. "'J92. Thes-2 .r-i,rionts were released in conjunction with the Pe^.. uil and Bay •.. RI/FSs and Proposed Plar- .nnd were raade avaiJable to the y-..--. -.z in both rnf; Adr,iinistrt. ' ,.;. Record and the information repository mair.tained at tne EPP. Docket Room in Region IV and at the Brandon Public Library. The notice of availability of these documents and announcement oi the pei-idin- j public meeting was published in the Tampa Tribune on both August 11 and 17, 19:>>.. A public comment period -was held frora August 13, 1992 to September 12, 1992. The public meeting was held on A.ugust 18, 1992. At the meeting, representatives from EPA presented the,three Proposed Plans and answered questions regarding the probleitis ar the t'trjei ,3it'£s end the, source controi remedial alternatives under consideration for the f tfeeves, Peak Oil and Bay Drums sites. A response to the comments received for the Reeves site dur .ing tr- public ccTunent period is included in the Responsiveness SuraVvary. -/idLch. is Appendix A of this ROD. This aecision doc\ir.i3nt prssents tne selected so'.:,rc-a control remedial action for the Reeves Southeastern Site, in Hillsborough County, Florida, chosen in accordance with CERCLA, as amended by SARA, and, to the extent practicable the National Contingency Plan. The decision for this site is based on the Administrative Record.

4.0 SCOPS AND ROLE OF OPERART-R liNr'T

As with many Superfund sites, the problems at the Reeves Southeastern site are complex. j\s a result, EPA divided the.work

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into two operable units (C'Js). Thase are:

o OU One: Conca-Tination : n the 3oii? and sediments.

o OU T-y/r . Contamination in the groundwater and wetlands.

uu Two --riLll bf addressed in cor. ju.'icf. ion witn the groundwater end wetlands remeaiation at the Peak Oil Jnt! Bay Drums aitos. OU Two will tti.<;o i.-.idro.'s .Tny nc-dco di.-5posfli of uurftico water from thf> pond.s. The remedial action for OU Two will L>».: ..••:.-'. ..'. .wi :.. ., lutor HOD.

This ROD for QU Ona will address the soil and ssdiajent •."coataTiiriction on hs- Rcovce SSG and ;?S'.i' .• s.c'liitie:"-. Tlr;:- pt:.'-;c>.-5F; cf. .tkip rerpr^nse ssfcLcm is t''z n ^ r . - " j : l . , ' : > i l ~ ''-''•-. .r. r a n g e in contairiintirsd s o i l s / s e d i m e n t a nd co p r e v e n t c u r r & n t o.r future migration of contairdnation to thn groundv^tiar- Potential

principal ria,k to human health because the EPA's acceptable risk range is exceeded and concentrations are greater than KCLa. This operable unit wiil be the first response action tor the site.

-•" • 0 PUHHARY OF SITE CJiARACTERISTICS

This sec:.ion will d.i.-: "iieral site characterist.i.c; .uid outline the results o.: i . .lurce Cfiar:,cteri-v;, ..<.i n RI. The issue of groundwater contamination is addressed in t;ie Areawide Hydrologic Remedial Investiqation and Baseline Risk A3L=ieasm>i;nt -; Bay Drums, Peak Oil and Reeves Southeastern Superfund Sites, Ca.nonie Environmental, April 1992. Although a short summary of this report v/ill be discussed here, SPA decisions pertaining to .the ri&Cid for groundv/atsr remediation v iil be addressed in a separate ROD.

S.2 General Sit-a Characteristics

,Clijaotc> in th© Tarupa area i;; '"herscterf-Sied by isi id winters and relativaly long, humid, wai;..s summetfl. Spring and fall tend to be dry, with the majority of the rainfall in the summer. The general topography is flat. The land use in the area is either industrial or undeveloped, with the nearest single family residential area being 0.25 miles east of the SEW facility. Topographically, surface elevations on the SEG facility range from 36 feet above mean sea level (MSL) at the southern boundary to 2 6 feet above MSL on the northern boundary. The southern portion of the SEW facility slopes gradually toward the south and southwest tcward small wetland areas. The area around the two facilities is relatively flat.

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Tho groundwater systcn bcnea: :c i s rc i coi^. l i - * - • . . . ^ V_* JL Lv.-o n ; d l o r water bearing units: a surficial cquixer rt:ferred to a c tho upper aquifer; and th':' Floridan aq-.iifr-.- systsm. The upper aquifer, whi.ch is dafir.'-j ds a Cl.-i.o;; IIB dquifec. La r.: om 8.5 feet Co .3 7 feet thick •:.-L..V a iiatujated thickness of about 5 to 25 feet. It is separated trc~. the Floridan aquifer by the Hawthorne formation, a clayey iow-perrceabil ( r layer from 15 to 40 feot thick. The upper aquifer ir. h-/draulically connected to surface waters (wetlands and streams) ^r.'J, the flow direction varies seasonally. Water levels alsc :luctuat>- seasonally and change rapidly in ra'iccnciO to ra.f.nJ'i.'i..' and other rjatur-?.! inf luenees. Although regionally the Floridan aquiior flc-..-:; '.ci •:;-,: -.-r.".: southwest, in the vicinity of the site the flovy dirfi~t.von shifts to the northwest. This is thought to be due to the proximity of the site to the Tampa Bypass Cansii, v-'hich reportedly cuts into

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"'•'r'j P:L.„.U^ ,,.,..;r.:; -; •--'• "••>';• ;••":.-: .~:'.' ^ Z ' i tcic.lJ i tipi; included t};e collection of aoii, sediment, surface water, ana air sajnpiea at the two facilities. The field work was conducted in tv/o phases. Soil samples were collected from targeted areas on the properties as well as random locations, Sedi.ment samples were collected fro.m tho fou.r inactive ponda at the two properties a.nd the u'-'.n-ufiGd creek. Surface water sajnpies were collected from the : .':i:v ' ponds that -co.ntain water. The general range of co;it .ii.i.n.'i'.n'.:' can be s -f.in :.r. Table One.

Elevatf: ! .Jnc concor.. wero detec*-?d at ;u.'Vor, . • i ne SEG targeted and .ivrtniom ..c wl-.t lof.i'ii-.sui. A.::. ..iie, cadmium, calcium, chromiu-'i, iron and mercury were elevated in samplcE f:rom an area of high subsurface conductivity noted in ctudios conducted in 1985. Elevated lead levels were noted near a currently used raw acid storage tank area. Cadmium, chromium, 'r.o'ic':-C':''.^\ X-ficd •,;;:".;? >>?r' .?.ont i?,t " l-c voted, no.ncentrJ?t."'.ona in a .yellovf

'•wais''cii Jiiuitfc- r-i'j. Uw ii.' < iori(ic;-r wi.cicLioplat.i.ng vVafJcf:; •iit..o:c2ii^<^ u iiik. Cyanide concentration was also elevated in this material and in a drainage pathway south of a 'iormer drum storage area end• in the drainage swale, along the east side of the SEG site," Organic species are not signiiiicant cointastina.nt .s.ou'x-cst; in -soil SiCTples •f-X'om .the. SEG aite.

Sediment samples from the west SEG pond contained elevated zinc and cyanide while saraples from the east pond contained cadmium, copper, lead, zinc and cyanide at elevated concentrations. Surface water samples from the two ponds generally contained elevated concentrations of calcium, iron, magnesium, manganese, potassium, sodium and zinc. Organic species are not significant contaminant sources in either sediment or surface water at SEG. Elevated zinc concentrations were noted at several of the SEW

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TAaLE ONE

Suim a'-v of Ch .T.-'cal CoT'.ce- ^ rat ions of the Cheniculs of Potential Concern

Chesiical

Concentration"

Soils (mg/kg)

Surface Water Sedijnent (ug/l^ 1 (mg/kq)

Arsenic

Cadmium

Chromium

Gold

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Mercury 0.028-7.57 --- 0.179 1 " " • " "

tilCkt,-:! , !J . iJV-l;:;, a j y S . 0 , 33.1-128.0 j

Carcinogenic PAHs"

Total PCBs (1254/1250)

i \.''.4--Tr.ichloro-benzeno

0.03-0.42

0.32-1.46

0.15-1.40

Zinc ]_5.3-1x3,000 149-362

0.0024

80-120,000

" Values are ranges of detected concentrations, except where only a single sample constitutes the entire data set for a medium.

.•'' Ji'iAHiif o.'.i^r.t-:^v.:.QA in be^'iO (ajpyren-i' -Toj.-iclt-i:' E'T'j:iv"iil;.-ncy Approach (TEFs) (U.S. EPA, 1992)

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western edge cf the site. The so; in this generai area aiso contained organochlorine pesticides, chloi-inated benzenes, polychlorinated biphenyls (PCBs), polynuclear aromatic hydroca"rbon?j (P/vHs) , phthal itr.- compounds and petroleum related co.Tipounds. .

SedJjnent sample.*? froia thc .1011 inar tivo STW p-ond area indicated elevated lead and zinc. Tha sampjfis aiso "onto.--;.-.•. .'. :- :.•'•••••:••• compound and PAHs. Sample-3 frcm the south inactivo. pond contained elevated lead, sodiura and zinc. The samples also contained phenolic coinpounds, a. chlorinated benzene compound and .O.'.H.Z'". r.h'iT?:' ? : ' y ^ . ' r V <'rd!"-"^i.'"':''d'f'.

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manganotiG, nic/:i wore not roliablv present

li,'. •.'"••.",'•';:•.,,"."' " "C.~a•'!Vr^"^^•^'"•cbn>?.t:l;t1i^im;•ti.•' (i.e. present at low ievoiH in two

samples but oi. har not confirmed in a duplicate sample or also present in a travel blank) iri surface water during the Phawe 1 study per.iod and were not investigated further in the Phase 2 study v/ith the conc-ar.rence of U.S. EPA.

•••::•.. LOIlowing conclusions v.'ere made in the Reeves RI based on the iniormnLivvn generat'^ from the Phase 1 and 2 KI activities:

o Metal coni;:. • - '.'. aro present at elevat-"-0 concentratio;"!; in soils, dedLn'ienta a..J surface v/ater at both SEG and SEW. Constituents are liinited in are al extent and are found at concentratio:--:: that 'ir'e amenable to conventional remedial technologies.

o Organic contaminants are present in soils and sediments on the western edge of SEW only. Review of the combined Reeves Phase 1 and 2 sediment and soils data for SEW, Phase 1 and 2 data from the Peak Oil Site Source Characterization RI, available deeds, boundary survey information and available aerial photographs and the absence of significant petrochemicail usage in the SEW operation process indicates that the oily material on the western edge of SEW is probably associated with past operations at the adjacent Peak Oil site.

o Remediation of sediments and soils for organic constituents along the western edge of SEW will be addressed in the Peak Oil Site Source Characterization Feasibility Study (Peak FS). The Peak Gil PRFs have acknowledged the need to include these materials in the Peak FS.

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The Etudy a r e a for t h e Ar-?a-Wide i n v e s t i g a t i o n encbr:ipa3se3 t ho Reeves SEG and SEW f a c i l i t i e s , t he Bay Drums s i t e , t h e Peak Oi l s i t e , and a d j a c e n t p r o p e r t i e s c o v e r i n g ar. a r ea of a p p r o x i m a t e l y 55 a c r e s . In a d d i t i o n t o the e x i s t i n g v.-ells, 38 a d d i t i o n a l raonitor w e l l s were i n s t a l l e d and deve lcoed i n t h e upper su . r f ic j . a l aqu.Lfor and 6 .nronitor w e l l s .-; . - is tal led and developed in t h e upper F l o r i d a n a q u i f e r . >jaalyi : ical pareimeters t h a t "were i n v e s t i g a t e d i n c l u d e v o l a t i l e o r g a n i c cciiu:':;u;7d£< (VOCc), seraivv-l ciul"'.^ • .. -v ;., . compounds (SVOCs), p o i y c h l o r i n a t e d b i p h e n y i a (FCDs), o r g a n o c h l o r i n e p e s t i c i d e s (OCPs), t o t a l patroleLun hyd.rocarbons (TPHs). t o t a l suspended s o l i d s (.TSSs)^. t o t a l d i s s o l v e d s o l i d s

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7hz •^'^•r'.l.'-f^.li-'.r'l r-'J-••'I•<-?,. of th--. g o•J .dv• =it' r sampling in tha surticiai Jiquxie-* ihi-r. d j-.:.- v.'.,:-. :>-.• :'\'<-".ri. f v:. ;-tlcldes, and 23 inorgenic constituents. No PCBs are p.tG.3ent.in the; surticial aquifer groundw.iter samples. Eight of the 23 detected inorganic species are coni.iion constituents normally found in soil and present in most groundwater samples. .Most VOCs were detected in areas close to thc Bay Dr-oms and Peak Oii Sites (which is con.si! .tent with the site source findings). Eight inorganic c.-jnt:::ituents in the surficial aquifer are found tn amounts exceeding federal m-<;:'mun! contaminant levels (KCLs) or Florida MCLs. T'le.'je are ant' • arsenic, beryllium, cadmi-o;:?, chromium, lead, nicJcel, and .SO.J . .,. '\i.evated concentration,'; >: • : j.nc are also present. A total oi 51 wells in the upper aquifer and 14 wells in the Floridan aquifer were sampled.

The analytical saimpling results of ground water fro.m the Upper Floridan Aquifer detected impacts primarily at two of the 10 Vfells sampled, Well F-2 (the Peak Oil Site production well) and

. v eii ?-3,' (-ihe';3 7y Drv:i3s S'^T.s product.ô.n ve.l.l). Previously, .thes wells acted as conduits for surficial aquifer ground water to • migrate to the Upper Flo7.-idar Aquifer. Prior to the Phase 2 field investigation, -EPA instailed outer dasings around these wells to prevent further, migration. Ilwelle F-2 and F-,3 contained 1.3,-and, 15 VOC /ri"?:-:ipi5Ctii? iiy. For'most oi thc ryCCs, concentru'tiona aro significant,ly highe.t in Well F-3 than in Wtill P-2. Compounds detected that are higher than MCLs include benzene, 1,1-dichloroetliene (1,1-DCE), trichloroethene (TCE), methylene chloride, toluene, 1,1,2-trichloroethane (1,1,2-TCA), total 1,2-dichloroethene (1,2-DCS), tetrachloroethene, and vinyl chloride. Sixteen SVOCs were also detected at relatively low concentrations in Well F-2 and Well F-3.

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OCPs and PCBs were not found in the Upper Floridan Aquifer wells, except a low level of aldrin [0.000061 parts per million (ppm)]

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Fourteen inorganic constituents were detected at relatively low levels in the sample? frora Well F-2 and Well F-3. Nine of the 14 inorganic constituents are also pc^sent in fr e backg.round sample from Well F-1. Arsenic was dete-rtcd in "Well F-!-l: (lr.l" ' f.>'-" above the federal and Florida MCL of 0.050 pp;>'-. Since Well F-iO 1.4 upgradient frora the study area, the arsenic is raost likely rom an offsite source. Berylli-om was detected in Wells D-1, F-

4, F-5, and F-7 above the federal MCL. The highest, co.ncentrations of metals found in Upper Florid!;.- - Ag-.;ifer well.'? were detected in Well F-5 and included aluminum, cobalt, iron, rKagneatum.- manganese, nic2<e.l, sodium, and zinc. Nona of the detected c-D>vjir-:v :.••.•:;: .••:51s •-iv;:c£ i-ibove federal HCL?. Weil F-5 is .constructed with galvanized btij.il aSid r-.- v'^-^^ <.--. rl.ace o'.'eu 20

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A "Daseli.ne risk aacesa;..-i*. to estimate the health or onvironmei'.tal probieu.o ..hat couid result if the Reeves site was not remediated. A baseline risk-assessment represents an evaluation of the "No Act.ion" alternative, in that it identifies the risk present if no remediai action is taken. The assessraent considers environmental media and exposure pathways that could result in unacceptable levels of exposure no-w or in the foreseeable future. Data collected and analyzed during the RI provided the basis for the risk evaluation. The risk astassment process can be divided into four components: contaminant identification; exposure assessment; toxicity assessment; and risk characterization.

Tv;o •3eparat:a •ia-seiirLe ri3k. assss'5:: e'it'E' hiuve btsn developed for this site: the.first developed for ths aite-spacific source contrpl RI/FS? the second developed as part ,of the area-wide gz-oundwater RI/FS. The. source control risk assesaxaent is. siimniftrized in.'thi? ROD, J?o;v-.eve.r, because ..the rsffiedisi action 'recdJitsflehdatiOfi in this Operable Unit, Oria flOD does n-o'c focae or. the groundwater, the area-wide groundwater riak assessment ia not summarized in this ROD. Since the soils and sediments evaluated in the source control RI/FS aire a source of groundwater contamination, the riskj associated with the groundwater exposure pathway are an important consideration for any proposed remedial action. T.he risks derived in the area-wide groundwater RA for the potential future groundwater exposure path-way for both workers and onsite residents exceed the acceptable range for both the shallow aquifer and t'ne deeper Floridan aquifer. The

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Floridan aquifer is the current source of municipal water R.-jpplies in t.he area.

6.1.2 Contaminant Identific.'°tio.n

The Reeves source controi RI/FS has focused on :;-':ll . • ' • •'' "• " contamination on the Reeve.^ S'.G and SEW facilities. Both of these facilities contain currently operating plants. According to the Future cf Hillsborough Brandon Planning .\rea Land Use Plan •iap, the site falls within the Urban Level 2 {U1.-2) Land Use Plan Category. This land use category dei-îcnates those areas located within the 1-75 Corridor and determined to be best su.Lted for urban use, with development occurring with the provision and timing of transportation and public facility devolopment. The ariâ a.:o\::v:\ X-lvj -'.•'',-'? "Io';:- •-•.•:-r. ::;:'.:: Cy:.x to coiitriln the public .

• facilitie.': .and ser'.îces-aseociated with the "urbaj-t" • - . classillcation. ?'. '--iri-cin" ar;='j is defined ar 3.:i ares; .h.Q'«.-"ing !.he

, ,cb---:r-;c;tor7 7t-'.c:5r rif-••. .j?i*:-yy vi-cb intense. devtj'icpiTient and ..un " . ' . • i=;dtensive range ox -p^jzlLc L-ac'^^j.-cL'L:^. i:ia ,:;3iv_cci;'. •••':'ct; Comprehensive Plan recognizes that development and redevelopment shcnld be integrated with existing adjacent land uses.

Thirty-Kix { 3 5 ) chemica' contaminants were found in the soils, surface wacf-'r and/or st..'.-o-r.s at the Reeves site. Bfiscd on the cheraical screening g-aii.:.. • : .. published in the U . S . E.!-"/ .'man Health Evaluation Manual (.'i.-iL.:; , ISS.';, 1.. •cliar.ii.-.:.!-; of potential concern were retained for tl-.-e detailed health risk assessment. Those 11 chemicals are:

o arsenic o cadmium o chromium o gold o lead o mercury o nickel o polychlorinated biphenyls (PCBs) . o,. ..po.lyn>j.cl©s-r aromatic hydxqcarbons (PAHs) • d" l,'2,4-trichioroben:,ie.ie . •"•

o zinc

'f'Jhile the selection •of chemicals of-, potential concern vjas .conducted on :-s DTi'Sdia-specific besis,, each chem,ical "on a final list of ch'2i&icais of petential concern was niodeied in the .exposure assess.T.ent for all media in which it was detected. Closer analyses qf the soils data, revealed that some of the chemicals of potential concern were uniformly distributed around the site while othe.rs were non-uniformly distributed. Plotting of this data indicated that four "target areas" existed on the two facilities where levels of contaminants are higher than both the levels on the remainder of the site and background levels.

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Thene tar'jet area can be teen o:~. the next page in Figures 1-6 and 1-9, ta.ken froa the site source c.haracteritetion FS. The soil and sediment exposure poi.nt concentrations at the site can be found in Table Two.

6.1.3 Exposure .^3sessment lnfoi'T:âtion

The two facilities are iencea <xr,d guarded, so o;;iiite access is limited to -.workers and occ:-i£ic:T:il -.'isitors. ya:;e:- J.J. <-_: , this infomiation, bot'n a current and future use exposure assessment -were developed. Two hum.an receptor populations, adolescent trespassers and Reeves employees, were evaluated in tha current use scenario. Chemical exposure:waa modeled through the follov;ing pathtrayj:

d • , : ? ; ' : - • ' ' ' •• . ' • . . _ • o irikaiation c l fu^'itiv": •••' -''^ . - .'^.'.--•^•-.-.~' '. ';. ' .^'*'-'-. - ^ ^ . ' ' r - x , - f ' '•.'^-i•\-':-

\::' i h g e - i x i ' o j i •61 dûi-i,-"' -- ' • •• • •-o ingestion of surfa-ce water; o ingestion of sedijTient; o dermal contact -with soil; o dermal contact with surface water; o dermal contact with sediment.

'j'hti -adolescent trespassers were assumed to .be exposed to soils for 10 days/year 10- J period of time of 9 years. The workera wero acîtuned to bo e • .-"• -i to soils for 3 nrs/day, 5 days/week, 50 weeks/year, for 3i: /• : :. For sediments, v/orkni":; -.-.'ra exposed for 30 days/yedr; the tr'joipa;;ser s.-;en<.'riQ remaxiis the some. Tv/o human receptor populations were also evaluated for tht* future use scenario - onsite resident, both children aiid adults, and adolescent trespassers. Cheraical exposure to tha residents were assumed to be from:

o ingestion of soil; p dermal contact with soil.

Chemical exposure to trespassers was modeled through the following pathways:

inhalation of fugitive dust; ingsstio.a cf fugitive dust; ingestion of soil; ingestion of surface water; ingestion of sediment; dermal contact with soil; dermal contact -with surface water; dermal contact with sediment.

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L. OHSITE SOIL AND SEDIMENT CONCEKT'î^TiONS EXPOSURE POINT CONCENTRATIONS (.-..g/hg).

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Chemical Site ;;id£* ! TAI

Soils •j?-oaj--T

Arsenic 1.54 • .. "3.20

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! Mer:;"ory

Lead

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39.5 57.9

. 1.76

322 "r.l323

Nickr.l

Zinc

Gold

Total PCBs

PAHs

1,2,4-Tri-chloroben-zene

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7795 ; .?7,413

1.41 {ND

0.036 WD

0.002 \ ap

1.90 laD

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ediments r •

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0.31

0.82 2.02

34. -113 31.2

2.64 n.66

351 I 994 " •jOS

0.08

3714

47.

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ND

ND

3.62

4:i'0

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50.6

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23.0

160.2

0.14

1 -1

607

49.2

ND -.1.82

ND

ND

0.21

95

ND_

ND

ND

ND

ND - Not Detected "--" - Not Analyzed .¥or.

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The atandard exposure assvr:2ptions used in t h i s r i s k assesarcent are as fol lows:

Adult Adolescent Child

Body Weight (kg) soil Ingeation Rate (mg/day) In;n.alation Rate (EiVday)

•Skin Surface Area (cmVevent)

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For" th-- - r'Ssirfer.t ady.';" . "ccnarics •'or oX , rp. ::!i.rs; ..:.:.. 50 dav .r-.' -na:: fcr ."lo" srpn-.rlc -•z:;v:. ••r' -r-;-: 7?:^ c;;p/yi:;s':r fv- " "ycisr ";,'• ."5; ? iutur-- >•.•.•. iid:;i<iJcau"c scenarxC p e r i o d of '^xpoiaare watt 80 days/year for .years. For exposure tc sediraents, only the trespasser .scGna.rio ••'r:'j •.•-•,,!; '•.::'.. ;-y; ::'i:ur v as : ::::;-:n:sd to hf; 30 ruiyii/year.

The assumption made in the risk assessment is that onsite chemicals in soil di.' perse into the air at this site. AJ.1 of the chemicals of potential concern are of low volatility and bind to soils weakly.

:.': . •,urj:;arY, the current use scenarios were based on limited <-.cc:„o3 to the site due to various security measures. The future use scenario were bo. d on the assumptions that: (1) the site was develop -:: for reside,'; " uae (no sediment numbers •/£-"'•; generated because sedim.ents v.fo-alJ ..'^ removed for .residential ueveicpment) ; and (2) because access is unrestricted, trespasser frequency is greater than in the current use scenario.

6.1.4 Toxicitv Assessm.ent Information

Slope £ac-:;crs (SFs)'hova .been developed by EPA's Carcinogenic Assessraent Group for estimating excess lifetime cancer ris.ks associated with exposure to the potentially carcinogenic contaminant(^G) of concern. SFs, which are expressed in units of (mg/kg-day)"^, are multiplied by the estiraated intake of a potential carcinogen/ in ing/kg-day^ to provide an upper-bound estimate of the excess .1 iietime cancer risk associated with exposure at that intake level. The term "upper bound" reflects the conservative estimate of the risks calculated from the SF. Use of this approach makes underestimation of the actual cancer risk highly unlikely. Slope factors are derived frora the results of hiiman epidemiological studies or chronic animal bioassays to which animal-to-human extrapolation and uncertainty factors have been applied (e.g., to account for the use of animal data to predict effects on humans).

Reference doses (RfDs) have been developed by EPA for indicating

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A r s e n i . c - , c.::'.di"flic.t: j -OJ.: :ii: , ru2rcv = . -c.^ -Hi —

UaJ.fl'. , O . «:.-'i« .-.

Gold was evaluat-'d for systemic poisoning u'ning s derived chronic non-carcinogenic criteria developed by SEC Donohue during the course of this study. U.S. EP.A guidelines were follo-«?ed in the dov'olopnent of this criteria. The human exposure database for I • ' .• o'Dtained in published scientific literature was used as the .,p'_ tc this analysi".

;ad lire was 'Cdlers (childre:-. <— es 1-5

A refereiice ".ation

• on a 3ubchronic 'nssis f • •'le cur'T^n' n . . , RP'\

uptake/biokinev-ic iiiodel ior lead exposure was us^d. blood lead level of 10 ug/dl for 95% of the e.xuosed popu was used to a.ssess the potential hazard for lead at this site. Arsenic, cadm.ium, chromiuim ("VI), nickel, PCBs, and PAHs -were each evaluated for their carcinogenic potential using U.S. EPA sloipe factors. Cadmium, chromiiun (VI) and nickel are viewed as carcinogenic from the inhalation route of exposure only. Arsenic, PCBs and PAHs are assumed to be carcinogenic from all ccu'tes-' b.j e ipos- re.,

As an interim proced.ure, until more definitive EPA guidance is established, Region IV h e ? adopted a tojticity'equivalency approach (TEF) methodoicgy for .evaluating P.MJs,' This methodology is based on each coT ipouh'd'". ralati-y-e potency '.to the potency of benso(a)pyrene. The-'I'EFs for the carcinogenic PiiHs are contained in Tabla Titres.

6.1.5 Risk Characterization Information

For carcinogens, risks are estimated as the incremental probability of an individual developing cancer over a life-tirae as a result of exposure to the carcinogen. Excess life-ti_rae cancer risk is calculated frora the following equation:

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Chemical Chronic RfD (icg/kg-day',

Slope Fac to r " (mg/kg-day) -1

=.-==^ Oral .Route

A.rsenic

Cadnaum

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O.COl ( f o o d )

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A r s e n i c

Cadmium

Chromium

Mercuiry

Nicke.l

0 . 0 0 0 0 0 0 6

0 . 0 0 0 0 9

PAIIs

1 , 2 , 4 - T r i c h l o r o benzene . '

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^ The slope factor for PA-Hs was obtained from the EPA Environmental Criteria and Assessae.-it Office (SCAO) . The TEFs used to evaluate the carcinoqen ic P.Aiis are:

Compound

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c a i i C d - r J : : . ' ^ 1 ; ^-f I x i S ^ i r : c : c " : . ' i : . r - - - •i:ti.:;t. /-ii ? j?c.:;; :i!>sii)t'.';;- •„•'.• i r .L ' . \ \ i i : i • estijr3"c:e^ L-"r. iri'Sivic-^.a! yt-i;-' .f; ,i •..'. L . . ' } . - : - Q f O u v , h - . ' - ^ i - i i X - i c ^ i c i c ; b a n c o o f

:•: -;'T:'.iv;'.".i-."*.i../::,'.: •;,'.,'''--,!.-r ..•?" . r^ry.^?: ".•" •.?ic.'*-Te''nti?e -exroûi-a,, %-a a,' '.••_.' • c a r c x n o ^ ^ ^ e n o v e r a " O - y i i i j : ItfetiiJUj •^;.:î:i' 'lhe ;.r.;'c:o„.rLC ij'^rv^r,'. ;- ' ..' conditions at a site. The A*ation<ii Contingency Plan (NCP) 8'tate.3 that sites should be remediated to chamical concentrations that correspond to an upper-bound ca.ncer risk tc on individual not fixcoedina IKIO"^ to 1x10'* exceîs lifetime .risk.

The potential for noncarcinogenic effects is evaluated by coraparing an exposure level over a specified time period (e.g., life-tim.e) with a reference doae derived for a similar e.xposure period. The ratio of exposure to toxicity is called a hazard quotient (HQ), By adding the HQs for all contaminant(s) of c:*..' cvT:n that affects the same target organ (e.g., liver) within a ,f,;.,-i£-i<t; or across ail Kodia to which a given population may re3SO'i^?fcly '::e exposed, ths Hazard Index (HI) can be .generated.

The HQ is calculated ^ " •••v.-s:

Non-cancer HQ = CDI/RfD

.'••'•/Jliersr' . ' -. -

CDI = Chronic Daily Intake

RfD = reference doss,'? ajid " • • . ' • ' • • '

CDI and RfD are e:epreoBcd in t/te masne unit's and reprwserit the same exposure period (i.e., chronic, subclixonic, or short-term).

The .level of confidence tnat one has in the information produced by the risk characterization process is dependent on the validity of the information used in previous stages of the risk assessment. Although uncertainties are inherent in all four stages of a risk assessment, the most significant uncertainty in this assessraent is probably associated with the toxicity assessraent for carcinogenic PAHs and arsenic and the evaluation of the dermal absorption exposure route.

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Lif-.etime cancer riaks v/2ro estimated for a l . ch't.'tnicaltj of potential co.nc -rn at t.he .Reevec- Southeastern Co-.-pord tio.'-: i-lta. T. e onjy .-ig.-.i f .''-'''.nt riako as definf-i by U.S. KPA (1950), e.g. risk £. JO'', that -..-are found adsociatsd with aoii contamination at this site in the current uae oconario were to onoito v/orkera duo to e,-';pc3ur.-; to chromium. This rick v/atj lean than 10'"', however. On-.'-. Ltn -.i-orkorfi who contact pond Bodimentc '.vere -iluo shown to cxhitvit nign.ificwnt rijika duo to arBcnic oxpoiiuro. OM-aite roHidencu ( f-a ;uro usa scenario) exhibited aignificant cancer riok~ cac to tixposure to arsenic, PCBs and PAKs ir\ iioil. Arsenic risk."? v ore at li'.t-.;-:'. ' •--" /"''> >, • and TA4, while PCBa and PAiis risks \-êxc prQsar .Z only at TA^.. Arsenic in pond sediments also presented a significant risk to Cutiiro-adolescent. trespasser;:,.

.ijiiîi.:y:'S.^:û .1/4".-.:- •:

Keceotor

CURRENT USE SCENARIO

7\dr'Lo;;v:ent Trespasser 0)- .-;' • . Vi/orker

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On-site Reaident (TAi; On-site Resident (iA4) Adolescent Trespasser

Soil Soil Pond

So; 1 Pond

Ci?.rcj. no CLE r. lc Risk :; •..;:: /.j;'r:f:r! ir: P \ d r . PCBs

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5x10-"' 2x10-''

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As is evident, chrse risks are all well within the EPA's target clean-up risk range for Superfund sites (10"'' to 10"*).

• " • • ' • " • • • • ' • ' ' " : ' " • ' ' • • • ' - ' " • ' • ' " p . . . . |f • . • • . . . . ; , . • .

With respect to the non-carcinogenic chemicals of potential concern at the' Reevea -site, none of the chromic hazard quotients for individual ch^.uical.g or the 3ur«ir.Li>l,:'.on'n, i;'ail'|"iaaard quotients for all chemi Cil .I-,:, to .a re;:;e?tor v;ere cyrâato/ t.hanil :;,,vOO under the current uso scenario. The >argefr3t chronic hazard','quotient was found for on-site workers inhaling fugitive dust containing chromium (assumed to be exclusively chromium VI). This hazard quotient was 0.79, indicating that the Reeves site is unlikely to currently pose any chronic non-cancer health risks to the public.

However, the subchronic assessment of lead exposure to potential on-site children concluded that the levels of lead in on-site soils at several target areas (TAI, TA3) are sufficiently contaminated to be of health concern. The lead model predicts that exposure to lead concentrations in Areas TAI and TA3 would

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In t h e fuc'- .re y s e s c c a j : r i o , î.'-.c a t TAi a n a t r i c h l o r o b o n r . o n e a t TA4 w e r a p r i m a r L i y r c s p o r i r i i b l e f c r s i g n i f i c a n t h a z a r d q u o t i e n t s ( > 1 . 0 0 ) , and t h e s e -.vera a a . a o c i a t c d w i t h t o d d l e r i n g e s t i o n of ' • ^ i l . Bo th cad!T:i'ar„ and chrc--., I •,'•:'-. e t TA2 c o - i b i n e d t o p r o d u c e a s i g n i f i c a n t haz-^.rd q u o t i e n t t c t o d d l e r s f o r t h i s u r e a of t h e Rcfiveo ' p rope r ' " Its':: . ThcjST; c".".'.-ul . i t e d q u o t i . 3 n f s w e r e a l s o d e r i v e d i n a h i g h l y con . ' j s rva t i ' . ' e . •nannei i n t h a t th.o c•rl-•^;^•' r •••;.-?'-'''-•••

.modeled a i icvining t h ' a t t h e y w i l l l i v e on thiâ ni'^^r <'?'.-icl\iBively 4s,t e a c h t a r g e t a r e a ) f o r 5 y e a r s a n d i n g a o t s o i l (200 rcg/d) from o n l y t h i a a r s i e . I t . l ihouid b e n o t e d t h a t , a l t h o u g h t h e o e H i s

'.;::cc:ii<:i •.j,ni"ty,." i d u a - - rhcr tc^?) h''^r,ftrd c rMot i en tu do n o t

The a r e a - W i d e 'gro\j;'Aa<.Jci-â'k- •-.ui.k'aj.: e 3 : p o s u r e s i n c e c n s i t e g r o u n d w a t e r How>?''.'"^r-, r.h<= -rl.'.-.V.'' r!<7sn',':l'^t':»d v;it'r

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i :.: v'55^=i;c-le, fuv:i:"i:o e.v.posure f o r woiko.£j OI rLiîj-•_u:r..;i uxciicici; •.:.».; l U i ; : j.'u..|jc5 iov: l>^jt;'i t h i t3ha.iiCi7 a q u i f e r and d e e p e r F l o r i d a n A q u i f e r , t h e c u . r r e n t a o u r c e of m u . n i c i p a l -water s u p p l i e s i n t h e a r e a . F o r t h i s r o a s o n , a c t u a l o r t h r e a t e n e d r e l e a s e s o f h a z a r d o u s s u b s t a n c e s from t h e s i t e s o i l s a n d s e d i m e n t s , i f n o t a d d r e s s e d by i m p l e m e . n t i n g t h e r e s p o n s e . i c t i o n s e l e c t e d i n t h i s ROD, may p r a o o n t an im.mtnent uiid.

• .1". i a r \ t i u l ondangernif.>nt t o t h e p u b l i c l i e a l t h , v . ' n l f a re o r t h e • •'.'., I<nimnt. Thc ond.ingerra<^.':it i a a r e suU: . o f t h e p o t e n t i a l f o r i^:^ '_i-i -ir d . -^Mtadat ior contaiiiir\ . , : . t . ; j from "i'.

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The environmental risks at this site wQ:re addressed Ln a separate study (Areawide Wetlands Impact Study). This study evaluates the ecological status, of the wetlands associated -with the Bay Drums, y6'rj':. 0.'-T ;\T>d Re.ry\r«= B Southeastern Sites, s t u d y a.r'e concaii'iCd i n . "i'a :' .;a.;c:iv.'i'40' 1..': ':).; The wetlands associated with these three in a separate operGblr' un,<,t.

The re-sults of thia •:"'.!:!'::. -Tr pa-::**, Kf.udy R e p o r t , sites will be adOreBSod

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7.1 Remedial Action Obiectives

Risk based remediation goals v;ere determined for several exposure scenarios. Due to the expected continued industrial operations at the SEG and SEW facilities, risk based action levels based on a cancer risk of < 1x10"* were considered appropriate. None of those levels were exceeded in the soils, sediments or surface water. Although the average site concentration of chromium did

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Soils/sediment remediation gcala that - -ere protective of ground-water wera developed. A r-'.in±5er cf contaminants evaluated in the Baseline .Ria:-: .\BS€;s~.T,er;t 'ii'J not hivo ther.e goals developed; mostiy because th-? contamina.".t wio nc-t r.:-.--~-.-vr- • - •'•":•'•• soil and ground'water ox- ''.-d-..' present but in very iO'/.' concentrationc. Ultimately, remediation goals were developed for -.chromitta, -zinc and lead., .A variety .o.f methods were, used to •"-.••'Svsicr) thia.c'"'•g:;ai*".. '.•.. , ' i •'.' ' ': .'

'•ihe-leL:ohi.."Ly;' 3'. .;.::itll v.: '.,"-.?::-::":•;:.:... •::. . '^^L'. 'd' . ' .r ' i . , ' . ' : :^:^, ..-,.-. ..; aoily/sediments vjraa evalu-ated by perxcmiing 'ICLt' anaiy&es ou'. «c5ie'~i- Boi I r?.nd sediment sfimpl3s. The data was th.:n avaluatiad to Littt/tiipt ;;o a-iit, .,:;..: '.V .i » • • " • - ) " • ' .- :';i;::•.;<..T: '.'.'.<:< »:':'"!:ai and TCLP l e a c h c o n c o n t r a t i o n o ; ho'«-ever, tho leacn concentratioa:-) w i r e lo-.v and no correlation could be determined. Considering these results, and the conaer-\'ativo nature of the-healLh-bastid goal of 49 rag/kg, no further efforts were made to developed a separate groundv/ater protection gonl . However, an fjvaluation of the r' :--„ . imn concentrations found during the Reeves RI indicates that '.«\'\' . '. the detections are below 69 mg/kg and the next highest

''kg- The large gap in detected •'-•-'.t values above 69 mg/kg e.rc: elevated

'.iig/kg wn.^. r;elected c s • '<' 1

CO l i e - . : -1 r .-11 j • ".'i .is 132 concentr-r ions indic for thc siC3. Theroc remediation goal.

The leaching potential of 'j:inc contained in the- -.r ? l.'/sedio-'.ent.g was evaluated in the same way as the chromi-om potential, Analyses of the TCLP versus total concentration data concluded •t'hii'E the 33di.r'5?'r.t "data \i: ?, .raore va-riabie than the, soils data, therefore, only the soils data v/as -ased.- -rai grohi-idwatez protection goal was computed using the correlation between total soil and TCLP- and the computed, dilution factor for the site. The health based drinking v/ater standard for sinc; (10 .rag/1) vas multiplied by the dilution factor to de'fcermine the maximuia acceptable TCLP concentrati'.yn and is used to deterreirie tha corresponding total allowaole soil concentration. Based on this computation, the resulting groundwater protection goal is 10,860 mg/kg.

The leaching potential of lead was evaluated in the same way a soil remediation goal for le lead was also a contaminant of Drums sites, necessitating the for all three sites. The leve soil cleanup levels calculated techniq-ue for the throe sites

contained in the soils/sediments as zinc. However, the selection of ad was complicated by the fact that concern at the Peak Oil and Bay selection.of a common lead goal 1 was established by averaging the using the direct partitioning Reeves levels are 748 mg/kg and

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The areas to be excavated can be seen on the next page in Figures 1-5 a. d 1-5, talcoTi fres the eite source charaptepization FS." .

7 . 3 ARARs

Section 121 ( d ) . ( 2 ) { A ) of CERCLA specifies that Supertund Remedial ActioR?3 -Lni-v.-t; .!',•!©•::: t a- y federal "p'ttindar'dyr.ef uirGnien-t,-'

, cri.torJ.a. or lirtiitation tltr: c i.y detorai.ied ito by "an applicable or . relevant and appropriate requirement (ARAR). ARARs fall into three categories: contaminant-specific; location-specific; and action-specific. Some rules do not specifically apply to a remedial action; however, because of their subject matter, they may provide some guidance in implementing a chosen RA. These rules are called to-be-considereds (TBCs). Potential ARARs and TBCs can be found in Table Four.

The conteuninated material at the site was evaluated in regard to the applicability of the RCRA Land Disposal Requireraents (LDRs) and it was determined that the RCRA LDRs were not an ARAR. The

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: j: .•• :"r-A.-- .iîrrKii

Location Sper if -:.

Fish and Wildlife Act USC 611-666)

Relevant ar. .--Apprcprlate":

Requires EPA to coordinate with federal and state agencies if remedy '.'.ould modify a '.-.-ater body. Remedy r-ist contain

i.'v.ons for • Kin of fish

' anv.

Endangered Species Act (50 CFR Part 402)

Florida Stormwater Discharge Regulations, FAC 17-25.042

-.-LlQlliS .

Applicable Kt^nsidered it -:&rr[edy involves iiacharge to »-inne.i3ed creek.

i none

Requires action to conserve endangered or threatened species for activities in critical habitats.

Specific standards for oil/grease in storTTT 'iter discharged to wetlands

ADDlicabl&-'-'-):

"JiOî.-.-idered i f îix.^- i s l o c a t e d in c r i t i c a l hab . i t a t a r ea for endangered or t l i r ea tened Goecies

TBC 1

J.

Considered if remedy involves discharge of stormwater to wetlands

.3A, 3D, SB

1, 3A, 3D, 5B

cn

f.'.:.fJSidered in :ii;-'.feiop[r.ent of -'.::-':';eK»atives if "•^-chrq'-oqlcal ^.^.--'c}i..toziciil -•.ijtii.acta may "'.:r i i ipac ted by ;'^;'i=aedy

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RCPA Landf illf:", 40Ci 264.300-264.335

Reg'ulistions for closure and post closure care of landfills

Clean Air Act, llatior.il Ambient Air Cj'uality.r I Standards (HP.AQ'j) lor

Specifies maximum primary and secondary 24-hour

TBC L.O-»-$ia.jjL-^v- _.:.

de 'y°elopnent of a l t e r n a t i v e s

Appl ic-li.jis. ' I Ccji'>.-Jidered ir i a l t e r n a t i v e s ' i i t o f i c t i n o «i';

3D

3D, 5B

ffuraiitv ! CFR 5 0 . 5 - 5 0 . " ? 1

1 1 t o t a l suKuendU'-; ; s o l i d s . 1

j C l e a n W a t e r A c t ( 3 3 USCA {-Oischarges t o 1 1 2 5 1 - 1 3 7 6 ) , h ' a fc iona l \ 1 P o l l u t a n t D i ' ^ c h a r g e 1 1 JJi-lTni'i-.tion i^JyEteiS; 40 ' f i •CFR i'/:2-i;;-", \

;l . t

C l e a n W a t e r A c t , S e c t i o n 3 0 4 ( a ) ( 1 ) , V76ter Oua?.^-'iy C r i t e r i a (V<QC) -•.'-• -.--

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a u r f a e e w a t e r m u s t m e e t NPDES r e q u i r e m e n t s , i n c l u d i n g d i s c h a r g e ' . i n i t a t i o n s , •..•:[\: .--oring ..-'jq - •_ - ' ?men t s , 'S nd b e s t managemei-.:. p r a c t i c e s

WQC a r e h e a l t h . 'based c r i t e r i a d e v e l o p e d t o p r o t e c t a q u a t i c

- l i f e and h\i:nan h e a l t h frora h a r m f u l e f f e c t s c a u s e d by c h e r a i c a l c o n s t i t u e n t s i n

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CV7A Water Q u a l i t y S tandards [CWA 4 02 ( a ) ( 1 ) ]

Ef'.'.iluent l i i i J i t a t i o n s

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• -0

CWA Discharge to ?LL,oli/"ix Owned Trea tment Works (POTW), CWA 307., 40 CFJi 403 .

i F l o r i d a VJetiands ! /iDolicsbii. ' R e g u l a t i o n s , ! F>.C .•.?-;-; II. .00

regulations ror diocharge into

^C-Oj ::,eciJie i D'jvelopment cf i none

General q u a l i t a t i v e deîign c r i t e r i a fo r d.f-.charge of r-r : la imed water • •.'0 wetiands

Rele'vant and Appropriate

Florida Surface Watei,-Standards, FAC 17-302.3^[.

Florida Surface Water Standards, FAC 17-302

••..••:..iV.n d i s c h . ^ r g e ; . "Re levant

•"jevslopment of • s i t e m a t i v e s i f remedy in 'volves d i s c h a r g e t o v?3tland

o l .was tes i n t o F i o r i d a wa te r s w i t h o u t t r e a t m e n t t o p r o t e c t b e n e f i c i a l uses

I .*.pp'i' . ate

Surface water standards for Class H i wate.r<? and site-specific alternative cr.lteria

Relevant and Appropriate

none

^velopment of . i-ternatives if retr-''dy in voi ves i diech'arqe to -.-/etl and

Cons.idered for discharge to the unnamed creek

none

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5 9 Oljiô material -would have, at one time, been considered a listed hazardous waste because of >te disposal on the spent pickle liquor, which was included i.i EPA's definition of a K062 hazardous waste. However, ir. 1986, E.''A amended the regulations by clarifying that t h e . listi.-ig for spent pickle lic[uor appliea to "Spent pickle licTiiOr generated by ateel f irti.shi :.y .:u.<.'riit.v j:.~. ..;: facilities within the iron and steel ind'ustry (SIC Codes 331 and 332)". As a result, the solids generated by the treatment of spent pickle liqrjor at thesa fwo facilities can b e evaluated forthe cht-.racteristics of ;iazardous waste and is not considered a derivative of a listed hazardous waste. Tasting dor.-.2 during thn RI .has determined chat, the contaminated raateriai does not exhibit . a n y . o f ("M'-i, ch::i-i:.scte:i.'^\pt.jiCi3'.-'t'^<''r hasdrdoua waste,'

•Vj. i'ii"" • ih 'di : (KCS-t-r ' i s t ' ' i^ \ : '

7.4 Development and Scre.efiu'ic. ' o i Al tar.-'.a tlv S'c-:'•'• '•' . ••' •

7.4.1 Process

hn a part of the process, the FS preljjninarily evaluates a number o*' different technologies. The technologie.:. are generally •• i-.luated on the b-asis of their effectiveness, implementability a ' . u c-oBt .in relf.tic-. to thc remedial action goal? for the site. •After the .screeniii'_ ••'••>- major alternatives were ''J'^termined to be worlh de-/elopir,ij 'i' caiJ.ed alternatives fo-. . ..Juation as the final cleanup p....--.. : ;jr sasu oi cross i.:,.i.orence with the FS, this ROD has maintained the numbering system used in the FS. The retained alternatives are as foilows:

Alternative 1

Alternative 3A

:^=lltern3tive 3D •-I

Alternative 5B

No Action

Cement Stabilization, Backfilling and Capping

Ceicent Stabili2at,ipn,, Backfill Onsite • .•• " ..i' •.i;,;",,:'ili."'i: :. •• ' •• . . - , . . .

Soil Washing.

7..4.;2 Alternative 1 - i-io a^ction '',!'.'

j!;'i::-jior Ccfflponents '0,f , the, . off adifi.l ..'Alternat j yrj... :>th&. National Contingency Plan (NCP) requires the development of a no action alternative as a )Dasis for comparison with the other alternatives. Under this alternative, no action be taken to reduce the risk posed by the soil/sediment contamination at the site. Only continued groundwater raonitoring is included in thia alternative.

General Components. The groundwater would be monitored on an annual basis frora the existing monitor well network. The estimated present worth cost of this alternative is $29,000.

•32-

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5 9 0 ;- . material would have, at one tiite, been considered a listed hazardoua waate because c£ .."ic disposal on the spent pickl liquor, which '.-/as included iri iuFA's definition of a K062 hazardous waate. Hc-*,'ever, in 1986, EPA amended the regula by clarifying that thc lir.ti.- g for sperit pickle liquor app

i*ciiiti.2€ '.'.•l:t.'".iri tn^'ircn an'd B K C ^ I iu&j .B 'cr .y (Sic. Codes 3 ' • ^ y ' ^ ) ' .. '' ': .'-" •-^•••^l'v.. •''''- .^<-;i-5 .'7r^.v"r.:>t^d .b- '- inhe tirrpt.;m!?;p.t:

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"der'ivat'ive' of 'e liatea •'naz'araotii*' • •v asxi;,-"'•"xi%is't i'iV9'''uoiie <i^^-^. RI has determined that the contaminated raateriai does not any of the characteristics that -v/ould make it a character! hazardous waste.

7.4 Development and Screening of Alternativeo

7.4.1 Process

A s a part of the process, the FS prolimina.riiy evaluates a number o^ different technologies. The technologies are generally •-•aluated on tho basis of their effectiveness, implementability

,-•••: d cost .in relation to the reraedial action goals for the site. .2Vfter the screenin-; four major alternatives -were determined to be worth developin, • ' detailed alternatives for j'/aluation as the finol cleanup pi;ii'i. I'or e-a .-j o t croad j:c;£erence with the FS, this ROD has maintained the numbering systein used in t.he FS. Tha retained alternatives are as follows:

Alternative 1

Alternative 3A

Alternative 3D

A,lternative 5B

7.4.2 Alternative 1

No Action

Cement Stabilization, Backfilling and Capping <-

Cement Stabilization, Backfill Onsite

Soil Washing.

No Action

Major Components of the Reraedial Alternative. The National Contingency Plan (NCP) requires the development of a no action alternative as a basis for comparison with the other alternatives. Under this alternative, no action be taken to reduce the risk posed by the soil/sediment contamination at the site. Only continued groundwater monitoring is. included in this alternative.

General Components. The groundwater would be monitored on an annual basis from the existing monitor well network. The estimated present worth cost of this alternative is $29,000-

-32-

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•.iKi;i'_'^ti:i...>l ,J.;: i,' : v " : "1 ;:>t;C: jjf "i,"' V •:;:. i.i ;?;:. ; •• "•-iteinbrarve over lc l .d vitl ' i i: .-r . 'nthotic r''--rj.ir.4<je- p-.it-cind -a i c i b r i c . f i l t e r . A. two. foo t t h i c k v e g e t a t e d -iioQ crjvC'r would b e - p l a c e d •'- :J~ t h e f a b r i c .-tiltc-j;:

••' •l]ir;.?/'_'C' '!JS3.'?i l'J:..... " '-i'-'.-eg-li-'i'ie would b;7 '-:;-'*:-.'.l . t. . ••«::.ccavato t h e SBG pbnU .' "•f'.L'Ke'nta •'. -::.':• --A ban.': ccnstr ' i . icrei ' 'i ic-••';•'.•••••' '•r-t-.a n].i-/aed '

:0'.-' I i •->' F". ;; " ...W'i. ''.'hc 'S-fc : p o n d riTC"? :r7-r'ftt "-•.: . . : o' C'. .' ' •-..:-.f-:;.•••;/':;, .:;"-'... ,. *.:"I:l.h a -bf.oic: rtrr: -r- ,.: .; .vc;:.. .'o ": .' "• igl:!.": , ...../ •, .'.i:.!:' :;f;':( >t. :i3iea b e i > t ' ' , , . T n o -• •former p o n d s -iV«d excaviitr.a ai:>â. '.-.'..JiUj-l bf, h.ucittiiled v i t h fiOi. f. from the pond bsrma, and i.mportcd backf-illp' if necesQa.ry. *i'he stabiiizatio.n agent would be pneumaricaliy pumped onto the soils/sediniSi»-Ls and mixed into the material using a backhoe. The stabilized materiai .would then be placed above tha water table in the SEG pond area and capped. To insure that contaminant leaching did,not occur, a five year annual groundwater monitoring program would be implement-..d. The capital costs for this alternative is $544,000 and the operation a,nd maintenance costs for the groundwater monitoring are ,"57,000. 'The total, present worth cost of the alternative is ?J51,000. .'

, AKARs.,Component. The major federal ARARs.and,TBCs for this alternative are as .f.ollov?'? • i ' '

o Safe Drinking Water Act, 40 CFR 141.11-141.16, 141.50-141.51;

o •. Snd-ingsrad Species Ac.t (50 GI'P. P'T t 402);

o , Proposed Rule for Corrective A,ction for Solid Waste j lanagemsnt Units, 40 CFR Parts' 26.4, 265, 270and 271;

The major State ARARs and TBCs are as, follows'-

•'-Q • riori'da-Drinking Water Standards;;; |F5VG. 1.7-550;

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This alternative will meet ell Federal and State ARARs.

7.4.4 Alternativp 3D - Cement Stabilization and Backfill Onsite

Major Components of the Remedial Alternative. The major feat-urc-iti of thia alternative include excavation of approximately 6,000 cubic yards of contaminated material frora the t-wo .facilities, '-:C.: ' ri ':--•,,-:.:;•.••.::•.'•J-..u,..;.!!;'..-!-.i.c-:i o ' . r h . ^ z m~i:e.rial,: backfiliina of tr.e excavated areas to grade, dispoadl ol tuc^ £,.-iiidif icd r,;jtcria;i into the SEG pr-nd areas a n d backfilling over the stabilized

. - ' ' ' S U ^ X e r i S i l ' Z c ' c : ' - : : ' . ^ - ' : ' • • • . ' •• '-•' •' ,'"'' "-• •;--^-y-;.ir-:;t^.r^^- • : y -. • • • • • - . - ' • .••• '••:

:•• •^|!U^:aiia^'l:.SSS&2^ ' Tho,' ?oJ:irtifi d/::i+ h: ;l:iiJo;a. rnntrriÎ. w \ \ . pi' 'svent botn cu,rrent -direct contact ritik -a-tfe'-'OdVi'iiiiiueJi ••-.'•l-. ./,'• .-:',-, .temination of the groundwater from contamination in the soi,'Lo/3ediments. Soil would be backfilled over the stabilized material to reduce, • i'n filtration of rainwater th,'-'-iugh the stabill-jed material.

General Coraponent. A dr. ugi ine x-jcald be used tc excavate the SSG pond sediments to a sloped bank constr>-3cted ( •a.rby. The sloped bank would allow excess water to run back into the ponds, 'îho SEW pond .sediment and the SSG soil t.vPL>id: bs oksfc-'.vs-.tQd with a backhoe and i.oved to-"a -staging .area: 'near- irhR? ptcO'Jid banlt-., • The . former ponds and excavated areas would be^ isat'lirliled with soil from the pond benr.s, and imported backfill, i>f necessari'. The stabilization agent would be pneumatically pum.ped onto the soils/sediments and mixed i:,::o the material using a backhoe. The stabilized material would then be placed above'the vfater table in the SEG pond area and capped. To insure that: contaminant leaching did not occur, a five yea'- annual groundwater raonitoring program would be implemented. The capital costs for this alternative is $451,000 and the operation and maintenance costs for the groundwater monitoring are $7,000. The total present worth cost of the alternative is $458,000.

ARARs Com.ponent. The major federal ARARs and TBCs for this alternative are as followa;

. - o. '• . af-a Crinhing Water Act, 40 C?F .l'i>l.ll-141.16, 141.50-, 14"1.51; •.,••.,'.:;:•.

o Endange.r£d Species Act (50 CFR ?art|,,402) r

b Prooca.-:: ^ Huis-i Cor Corr.ect-iv-i .PS-t.-lc-r,,. f,a-,- 'îolxo V7.-i5t.' ••;• ''• ., iianac,.2men-c Units, •••'iO CFIi'. I'firt'r •2.fc'.-'S .VasS., .270 c u d 271;,

The major State ARARs and TBCs are as follows:'

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This a l t e r n a t i v e w i l l .-neet a l i Federa l and S t a t o ARARs.

7 . 4 . 5 A l t e r n a t i v a 5S - S o i l s '^•'itihvna - Major Components of t h e Remedial A c t i o n . Approximate ly 6,000

''- :CM i:f:'-yf>xrfc- ^f n a t e r i - s l 'x.-r>ulci b?: fi^fêivetocfc es^^^put'ir!t-c> a hipAiîng. t a n k . ' uTh'. - uo. t i3 wa;ih;'.n*j'frnce'sis vau^ci ."JtTiti - ' Hf • :,'-e'S3la-i.ct-: t".he,',-

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covered with t o p s o i l ajid reaaeded.

'i'rfc:at:-.ui!at C o u u . •0'-~'"« it"p>.lf -would consist of a chelating agent/acid solution countercurrent fiow that would strip the metaia frora the sediment/soil particles. Three to seven "wauhing stages would be req-aired to achieve cleanup levels. The washed soil would gc through two or three rinse stages, dewatering by filter press and then placement back .•.•.;to the SEG ponds . The leach solution would be treated by p. ' oip.i.tation and recycled back through the soil washing process. T.-.rf precipitated >,-=?-il .s-ludgo would be transported to a metal recla-.:.-.: ion facil ii .

General Com.ponei-.ta. .('A. S'"/'araullc '.-jreclije woulu uc U3(;d to remove the SEG pond sediiinents, which •,y-0"uld thei-i 'oe p-omped into a holding tank. The contaminated soil and SEW pond -oedi-Cients wo-ald be excavated with a bac3choe and mixed with the SEG sediraents. Because this process would remove the co.ntamination from the site, no operation and maintenance is required. The tptal present worth cost of this alternative $2,22,5,000.

ARARs Component. The major federal ARARs and TBCs for this alternative are as follows:

o Safe Drinking. Water Act, ^0 CFR 141.11-141.16, 141.50-141.51;

o Endangered Species Act (50 CFR Part ,40-2) ;

o ' Proposed .Rule for Corrective .Action, for Solid Waste '- ,, Management Units,- 4p CFR Parts, 264,j, 26,5/270 and 271?

The major State ARARs and TBGs are as foIlowsT

o Florida Drinking Water Standards, FAC 17-550;

o Florida Stormwater Discharge Regulations, FAC 17-25.042.

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b.O. SU?tMARY OF THS CO-MPARATI'/." _?-y'S*.;.Ji^l5_3_? ALTERNATIVES

8 . 1 Cri.terif. fc_r,.Eva 1 ]i5.tJ; ig_Jif:f••e d.i._aj.__? Iternativej

In selecting its pr .-fGrr-- .-! tleinur. alternat-ve. £.'.•.-. .;.:•.•. ... ,-criteria to evaiuate each of the detiiilao alternatives developed in the FS. Those nine criteria are developed in more detail in the figure cn the next page. The comparison of the four alternatives using those criteria can be found in the remainder of Section 3 of this .HOD.

8-2 Threshold Criteria

,Jt?"-r?^\'.>---'Oy,'^'CtjiI y-'''^^,:SC_t^c:T:_ -^'t:: i---t;!.rr'.=."-

'• i i i ' t e r d £ t i v > i ; - - i ; j i ...:.: ,-,-,.i:vi::.--.i:v.:.Chj.iy ,,•^J;,^t•::r. ^,::;j:L:b!|:\j,;!i,o,:, '"•'>:, h ' o ; : i h . '' - ," health and the environment than either 3A or'3b'because the " contaminants are removed from the environment. However, the i,T5-.iobilization of contaminants offered in 3A and 3D provides ,--c..'.5uate protection, Tho protection offered by 3A is slightly bfecLor than 3D beca-aae vrater contact with the stabilized waste is m.inimi?:ed in 3A. Z i n c B the No Action Alternative does not elimir..-:3, reduce c '-•'•'-ol any of the expo8u.re pr-rh^'ays, it is therefore not protec:.: --. •- • human 'aoKlt,h or thc onv.-, ,-....'.'iient and will not be conaiderea ^jr^ner in :h.-: analysi::, as an option for the source control.

8.2.2 Compliance with ARARs

All of the alternatives comply with relevant Federal and State ARARs and with SARA's preference for treatment.

8.3 Primarv Balancing Cri.ter-ia

8.3.1 Long-Term Effectiveness

Alternative 5B provides the greatest degree of long-term risk reduction because the hea-vy metals are reraoved frora the soils/sediments. Alternatives 3A and 3D provide significant 'long-"tenR pro-ta'c-r.lon' j^.' that the bee-iry •'vetfl.ls are immobilized onsite and therefore are "not signiricant-ly avaiiable for-airecc contact or leaching .into groundwater. Because 3A minimizes the amount the stcibiiized. vaste comes into contact'jwith -water,- it affords slightiy .more; long te^nu e"ffectiv.ehess-i-fehan 3D; however,, ' bench scale tests "indicate that the stal?,ilized v/ascs will not significantly leach -even if it comee into sustained contact with water.

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CRITERIA F O R Ey.-U.l-AT •.WG RF.}.!ED!J'± . \ I . 7 t F L \ A T r ^ ' E S

In . t i lecdng it", p^^'ferred c leanup cl'.er~:::f...-f. F P . \ uî.^: ',}te :'oi!<su:in>^ cri leria ta n-aluiiie eiK-ft of tkii aiierr.cd>..-^.i d^'.-iiopid -"'t ;.".r Fec..''-tit-.r-,- S','.idy 'FS) The fir-j: :.»o cr i t t r ia an : thf ssi>iiiticJ. Th. '^shoid Cri:e^.-ia a n d mua : isf r-tcl b t f a ^ n," cir.'r'-r':c.'::-jr.'^.'! b^c~-iiiidfr\-d f-.irt/ier. The ne.rt fii<e are the Pr-l.-nory Br:Jn. idng C.-~.ii;.-:a :-.j:td :-J f-j-tkc^ C-L j.'t;(i?f ;hc a-.'.i.i . , .-• :,. j . , . •_ _.,• Cri ter ia have betn mel. Tlie i'liir Cwo .VoiiAj/i.tr Cr i t ena a m used t-j I 'unhcr cvaJuc.le F . P A ' S preferred alterr.atice ar.d Proposed P l a n afte'- p:.c:i-r cOTj.fr.fn.' p r r i c d ha^ cnji-ii a n d comments f rcm the State have bes.t rex.^Jv€d. .4// n ine c n t a r c tuv t x p l a i m d ir: rr.orv. dc tc i ! here.

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CsmpHan-ce imiî w-ppiicable or It^levcaii an/d Appnipnals Reqvdre.i^?jat'is • .we. sp.* civnplioiite with. Federal IState requirsmenti.

.•'.':• "f- -.Vcigfung ih.: ':' ':•.'- ..-f •?. rzrtie.dy against ihc coat cf implementotion..

^mplc!rii:rJx:H,'.''-f - Rcftrs to n,,. tr.-'iniccii ftr-j -iciKvy c-zd adnDKLxirciiit't' ease of a mtmedy.

SSvori-Term Effediucnsss - Length of tima for rtriicd-y to cchiei>e protection and potenticd irnpact of •::::•.-'.>-.'. '• '^.td irnplementation of a remedy.

Ltmg-Term EffkcSiitsxtess • Degree to which a remedy ca.i rn^nlain protection of health a:id environment ance clsaniap goals ht!'-." baen met.

' iiedstj-xicn cf'i'txiddiy, LJoiaJaity, c r---ifCiiunx 'thror^jn Yrîiiiinenl - "Ii^fers to expiciKc! per-foT-ir j.c^ of the treatment ieehr.aJogies to lessen karmfui natan.; niovement or a.iiount of contaminanta.

S&si-s Jis^}'ca::xt - Coruddsrcticn of Sfcfe's opinion, of f.'ts pfvfen-ed alismative.

Cammuitity AocspUmes - Consideration af public comments on tke preferred alternative.

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Alternati-/o 53 provides the greatest in toxicity, rtobility or volume by reclai.îng the '.-.ea'. netals froa tha aoils/sediment. Alternative 3A and ID are roughly rr:ual in that the stabilization should sufficiently reduce c.ov;.'rv-'rt of contajTiinants to groundwater.8 , 3 . 3 Short-Terra Effectiveness

Alternatives" 'ik and .'JD present r.i:";..':'\al irho.-rt.-rcrr: ••'.-r-.'.-•«; --•.-- '-..•• to onsite workers imp] er,-t»:ir. > r.g the cleaj-.-jp plan. Tt-;r;6e can Dn averted by precautionary' --/or-ker safety meaBures . Alternative 5B ;hac! a slightly higher riak that the othor threa bocaufje of: a slight rioe in potential risk to tho generni p-ablic due to tha transportation of t.he wetal aludge t e a rtJt;l;unation iactlitv.

Q. 3. 4 linplomenyabi Iit_v •• r ^ - T J i i - ^ ' - l h - ' : ' " ••' • - . ' i . - ^ ' l . - i r :

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X:: ^ y , , } } - ^ \ ^ A r,ec--jy.£i-.--

, i . c - '•>. 1.'^$'. '".''t'c-.ti u^-:-::rx a .••»•.-: V i i i f t t • » .' " ; . , • - : • ' : •

•:• - . . . • - . - , - - „ • ' - . • r • ...--.**•' ., •--•-•.; , . . , - 1 , . . . , . , j . . . - •, ^ ; ^ . • • ^ f ' j i j , . •^ ,;',?< i i . - - r . r . \ j . a . , i h t

many sites. ' Con^jequehtly, there ' is 'hot a "iar 'I' 'bdv •ot'-knowiiitigii '--concerning how to "-ipply the soils washing technolog-v' to a, particular site. Implementation of Alternatives 3A'and 3D would present identical levels of difficulty to each other. The '':echnolog;i.'- utilized by these two alternetives, solidification/stabilization, has been implemQnted at numerous ."lite:', rr.d ii; well und-rstood.

8.3.5 Cc;c

The comparative p.resent worth co.st.-alternativGs are as follows:

o't tne threa r ':.n;jining

.Mternative 3A Altarnativ-a JD Alternative 5B

$551,000 $458,000

$2,225,000

Ily The costs developed for Alternatives 3A and 3D are substantia identical. The increased cc... for Alternative 3A over 3D is based on the cost of the cap plus the cost of the additional lâckfill. The cost of Alternative 5B is primarily made up of the •hydraulic .dredging, sollc .-.••"c-ih.ihfjj . •'vd •(:&?! •::„ran3ppr'tation and metal reclamation of the metals contaminated residual' sludgeis.' '" The excavation and backfill costs are otherwise identical to AlternatiV'B 3A. •," -, -.' .y .; "]

• • . • . ' ' " " . - • • ' i I '

3.4 Hodif ving Criteria ,• " • , : ' \.--

8.4.1 State Acceptance

The State of Florida, as represented by the Florida Department of Environmental Regulation (FDER), has been the support agency during the Remedial Investigation and Feasibility Study process

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In i c c o r d a n for t he Rc'CVas 3cvitho<J3tt;cn s, 300.4 30, ?D2H, as t h e s-;>pport t h i a p r o c e a s . Based upon co.-rj- ^ . , . . expec t ed t h a t c o n c u r r e n c e 'rfili 'cr! for thcoming; howeve: I 'Qtter of concurrence, ha i not yot bfien rec-:-: i.ôd.

g_..4 ..,2 Comrnunity Accept^tnce

wit,h tho 40 CFR agency, has provided input durir;q ents recei'.'cd from FDER, it is

a fornu'l

The community e-xprcs-ed no -iieJOJ: concftrr.s about t h e , s e l e c t e d remedy during th-r cv/oJ ic C'2;--iv,.;.'-.t por led. coinmunity axe discaased in detail i;; the Heaoon6x^-i:nosii Sajt'.;'a=;ry, which is Appendix A of this ROD.

•- L.> ' ;ed' .upo;! ,concia,ej£-atien .o,f the . riqwii«',[r.ei?t' il h i - CSKCLA';- th-s t^n ' - , : ' ^ ' : " \ ' - - \ y . , . . ' - •;;- c :-."•..:.>,: -ri-.-li;:;:;.''. t''•;-:--v. -j ,Kyj *:Vr-,. nc* -itoto.'-' '-,-,

comments^ EPA has seiecteo'-AltiiUi:';!--r^ ''..v W'i^h^v'-'-yarce ôr^ttol-remb^dy for thic site. ,At the completion of this remedy, tho riek associated v.'it.h the .soils and sediments at this site haa been ' calculated to range between 1x10"^ and 1x10"--, which is within EPA'E acceptable risk range of 1x10"° to 1x10"'. EPA has r.-' te.rmlned that this risk range is protective of huinai. health and ''i-< environment. Because thia remedy will not result in :':ri2ardoV'3 substance.? remaining onsite above health-based levels, the fn/G-year rev;.-- --,'111 not apply to this action. The total presenc worth cot-v. -; .'êlected remedy is esti^.-rr-d at $551,000.

Mloi_Cpm£onent,s_^f__ciie_ReiT:6d^^ T.ne ma lor features of this alternative include excavation of"apprax.-;-..T:atei-v 5,00'?; cubic yards of contaminated material from the two facilities;, 3ol.idifici„...^,(/stabilisation of that material, backfilling of the excavated areas to grade, disposal of the .solidified raateriai above ground where the SEG ponds formerly existed and capping of that material. The areas to be excavated can be seen in Fioures 1-5 and 1-6 on page 27 of his ROD.

Contaiiiiflent Component. The 8oiiaifi&d/bca'bil''ized material' should prevent both current direct contac'- risk and continued migration of. contaitiination froni the soils'/sediments into th'S groundwater.

,A lov.psrracability cap shall be constr'.icteti loyer the stabil:Lzed mate):ta'l to sftii\inii2e t.he anoiuit of rainfall; linfiltratina through it. T h e cap shall consist of an "HDPS mexob'raln©'over l a i d ' w i t h , synthetic drainage net and a fabric filter. A two foot thick vegetated soil cover would be placed over the fabric filter.

P_er.formance Standards- Performance standards for excavation of the soils/sediment were developed to protect human health, to prevent contamination of the groundwater and to be in compliance with ARARs, Excavation shall continue until the remaining

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soils/sediment ara at cr below tha selected performance standards. All excavation activitiea shall cc.mply with ARARa. Testing ff.ethods approvad by HPA shall be used to deterraine v/hether the performance standarda have been achieved. The standards fi.'jiected for the ch^-^'icals of concern are as follows:

Chemical rertorii'.a.'' c_ Standarda (MC(/kg)

ijhioniium

5!inc.. ^

69

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''-;•;.-; :i''5.i' After the Hoiii;,':;edl;^:onLb tJii.:. ..i'._ .•'•^'^•\.-.•\r..^:^'::A. performance st.ar.do'rd'S are axcavatad, it will be stabilised. Based in part on recommendations found in the EPA publication Stabilization/Solidification of C5RCI>A and RCRA Wastes, (SPA/625/6-89/022, May 1989), EPA has determined that the ,collowi,ng performance standards for the stabilized mater'i.al aro •'Of>':ooriate:

^erii-^:,?-'ter ?.:'r-forraance

• "iard Testing Metho'-^'loqry

Permesbili'^'.'

Unconfined Convpr;-!': - •" ---~ Strength

Leachability

Leachability

..x-O"

.> 200 psi

< 5 mg/l Lead < 5 r--/l Chromium

l e a ^ c h a b i L L t y i-ndox ,.'>• 12.:

r.FA Method 9100-;SW8''i-5

ASTM 1 6 3 3 - 8 4

TCLP

I J ' Jod i f i ed ',•' jl i^,s!i^'s,'.'-i6.1

Because certain performance stQnda.rd3 may. not ibp determined until the Remedial Design phased, it sha,!! be undafij-tclod that the.list of performance standards in this section is notl;: ejfc.lusi-ve and .may be .s.ubject to add.ition and/or. modification by'; RD/RA phase.

tihe Agency in the

General Component. A dragline shall be used to excavate the SEG pond sediments to a sloped bank constructed nearby. The sloped bank would allow excess water to run back into the ponds. The SEW pond sediment and the SEG soil shall be excavated with a backhoe and raoved to a staging area near the sloped bank. The former ponds and excavated areas shall be backfilled with soil from the -pond ber-ms, and imported backfill, if ne-cessary. The

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^^:"-''":- " r ^ ; . ' : : r:^^:r'1^J^f^':--..^-;^-;: ::.:-;;, ": ;;•.',- '>^"^ ' :?V:r :^ i4^ ' : , "d ^•'^-..,"' • ,:' .;-.,:,::'i-:0"-'"'' ,,:'i .-,•?-:«v:''&,A.'-;,: I; 'V''*/>'""-< •' • rV : • V--

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stabilization agent shall be pnou-r-atiCi lly piinped onto the soi-5a/p,ediments and oixod i.-.t;:: thc Daterial using a backhoe. Tho stabilized material shall the.-, h-: placed above the water tabic in th ^ SEG pond .area and capped. De.ed restriction;-, or sorae other tyra of iand use restrictions will be so\jght ir. order to provent a.ny activity v/ith the pote .-itia.! to damage 'tiit} solidified/sta'oilized raonoloth. To insure that contaminant leaching did not occur, a five year annual groundwater raonitoring prograra shall be iraplemented. Addition operation and maintenance activitiea •-•ill be outlined in the Operations f. Maintenance Plan that wiJl be developed as a part of the RD/RA, -Tho capita•". coeta for xhjLe sJrternatJ.ve i:P. $iJ44,0Q0 rind th -'o st ation-and , ':.. .: ... E(i.i.Iii-:,eatt,T::v» ;::o.-"if:- i . • ^ : ^ • ' . . ' • r j ' q ' . ' , : - c \ : : i ' d ' - - \ v - z T . . ' : r;:.,.: ••,;tcr |,'': '-' j . , i ' ( -^ $ , ' L J } 0 ^ . . ' ' ^ l a , ,"•".":•••:'-•". .'j'"--?'^.--V ' .-'-i;>i..-r ':-i,-r ,c-,i: th«=- al'tîi:nr-,i: We-,;vi|!;,^39j,,"(;"iJ(},. l" . ''.'^'

ARARs Coraponent, The major federal A.RAR3 and TBCa for'this ' """ alternative arr ns follows:

o Safe Drinking Water Act, 40 CFR 141.11-141.16, 141.50-141.51;

o Endangers:. Species Act (50 CFR Part 4 02)

Proposi'-vl Mfinageni...

Corrective Action for ' ,'lid Waste 40 CFT'. Paitr. 264, 26-'., .' ond 271;

The major State I-JRARs and TBCs ar.? as follows^

o Florida Drinking Water Standards, FAC 17-550. "

o Florida Stormwater Discharoe Regulations, FAC 17-25.042.

This alternative shall m' e*- all Federal and State Ai--/vRs.

10.0 STATUTORY DETERMINATIONS

10.1 Purpose

Under CERCIJA section 121, EPA must select reraedies that are protective of human health and the environment, comply 'with ARARs (unless a statutory waiver is justified), are cost-effective, and utilize permanent solutions and alternative treatment technologies to the maximum extent practicable. In addition, CERCLA. indiudes e.:. r?ref,erenc3 for rem.ed-ies,-that employ treatraent that permanently and significantly reduce' the 'volume, toxicity, ' or mobility of hazardous wastes as their pjrincipal element. The following sections discuss how the Se,.lecteqi,'; .brpmedy meets these statutory reiijuirement s-. '' . ' ,' , .IiT .j • ' ''

10.2 Protective of Human Health and the, Snvi'romnant,

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The selected remedy protects hu.aan health and the environment by immobilizing the contaminants in the stabilized matrix and disposing of the matris abcvs r.he - -ater table. Stabilization •will reduce and/or elicviinate the direct contact threat to human health and, by binding the c-ov.ts2>ir;.^nLs in the i't dV : "! • ".-i •^^*'-:y... will elLiiinate further migration of contaciiir-.atior. to the groundwater. The stabilized matrix will be disposed of above the water table, covered 'wit.h a lo-w permeability meirib.rane and a two foot soil cover th.3t -will be revegetated. This will serve further to prevent direct co.ntact with the stabilized mat-.sr.ia.i and leaching into the gr'Oundwater frcm the .material.

.M;i;i;."i :•;•.: j i

Requirementg {ARA?..g) Xi X"'•""able iir .Bsl3>: nt_an,d_ .Appropriate

A - , i , - . - . -

lj. ( ., The-seleCiê.-l re-i-a'rr o.£ •&iu::'.':.''c.tio:i, stabiJii'ij 'ltjjioh,' d i i ipOsal , abo-Vs

thS"; !,:''-;t'%,r. 1 .?i?lF ar-^.",c^:-j>-'"n'c -ri.'' ;*„ .-c-smiply-Iv-lt?i''.. ,i<?ji'li AJSAR?.-',-",. T.2-)c""':•:.,;-.';, •"AR'5r g -iit'ey-pr.asanteci,'b.i.:;,L.o.-,, ,' •. • , -.-'/-.r'-'il.V'C^'''•'•'. "•• "• •".V, „„• " •-' ''."•"'

o Safe Dr ink ing Water A c t , 40 CFR 1 4 1 . 1 1 - 1 4 1 . 1 6 , 1 4 1 . 5 0 -l';i.51;

o

c

Endangere--- Act (50 CFR Part 4 0.'O ;

Propcied Rule L.DX: Cor.rGC'.ivo /-rctlo.-i l-:r Solid Waste .Management Units, 4 0 CFR Parts 26-1, 2-S5, 270 and ?7j

Tiie .major State AFJ<Rr and TBCs are as follow.":

o Florida Drin.king 'Water Standards, F. .C 17-550;

o Florida Stormwater Discharge Regulations, FAC 17-25.C42.

This alternative will raeet all Federal and State ARARs,

-10.4 Cost Effectiveness . . , „ , , , , . ' • ' " ' " • • " ' • ' : „.;, - • • • . ' ' • .. . | ' J : ' , . . • y I , . . , , ,• , . , • • • • '

EPA believes that the selected remedy 'vill reduce the risk to human health and the environment from the soils and sediments at a cost of $551,000. The :Selected remedy,, thbugh slightly more expensive than t h e s.iini.lar Alternative ,'3.0, .provide.^ a higher level of -'ion^ term p.rpteet-ivena3s by remOvlngj -the,, contaminated, materiai from•contact with the groundwater., Thia will prevent further- contamination of the groundwater. Although Alternative 5B provided the greatest degree of long term effectiveness, it cost significantly more than the other three alternatives without providing a significantly greater degree of reduction of risk to human health and the environment.

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EPA has de t e rmined t h a t t he 3oiec::od •L'e,x:ecy r e p r e s e n t s t h e maximum e x t e n t to whicn perauane.-it s o l u t i o n s and t r e a t m e n t t e c h n o l o g i a s can be u t i 1 i't'f.'-*. i n .1 ccat-e££GCti ' , -e r?flnner for t h e f i n a l sou rce c o n t r o l operft;Jio u n i t a t tho .RCOVCE; ?,C'r '••'.'••''.r''•'•'--s i t e . Of t h o s e a l t c rna t i voL i t h a t cire p r o t e c t i v e of hvur.an h o n i t h and t h e enviroma-ant and comply wi th ARARs, EPA has dotarminod t h a t t h i s . s e l ec ted remedy p r o v i d e s t h e b e a t b a l a n c e of t r a d e - o f f s in terms of l o n g - t e i m e f f e c t i v e n e s s and permanence, r e d u c t i o n in t o x i c i t y , .mob i l i t y , , o r voluice ach i eved throu.gh t r e e t n s e n t , s h o r t -te rm e f f e c t i v e n e s s , I m p l e m e n t a b i l i t y , und c o s t , w h i l e a l s o cons-iderlr jg t h s ' .s'^.atutory" :njr?frr:e-^.r:'c: "for "•S :'o,<ii:"ib"#ii :r -33-"".•?>, : i: iWyi'oici-H,ifei:(c-.-n: . "Tijvd. GrATtylderi-.' q: £v,tt'f.e '•iifiij co;i;*-iaii,j.t > "•Sit:-G'.'i,d{:.: iij:cc." • ' ':

. ' • : " ' : . . " ' ' ' " ' ~ : . - , - " , ••^•' ' ' " ' • ' ' . ' • . • • : • ' , • ' •' ' , • ' • - ' " • ' a i - ' - j t ' • ,• '

The selected reraedy -will " ef fectiv-ely' immobiiii:itdi''ii;v;4' ••Jortta.i.*ina.ii\;ii in the soils and .:e-d±n]entc and will prevent a,Ry. .further direct risk to human heaitii or threat to the groundwater.

10.6 Prefe.rence for Treatment as a Principle Element

?y: ii-,;,',obil ixing the contaminants in the stabilized .matrix, EPA wiii meet the statute—' preference for treatment as a principal element o'-' ' :ha remedy.

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At the time of the pi.;,.bli'j cor- -.e.t period, £r''A m.'; .- ...,,:,,....•. preferred alternative for the aource control Operable Unit (OU) at the Reeves Southeastern site. EPA's recom.mended alternat addressed the soil and sediment conta:nination problems; groundwater and '.vetiandfi contamination problems will be addroo in a separate Record of Decision (RCD). '.Che prefoj:r';>ri 3.1tern«t in th© OD One ROD .'..s..excavation Oi" the contam.inated.soilE/scdiniCi

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Judging from the comments received during the puJblic comment pvsriod, there are no objections to the selection of EPA's preferred rijternative as the selected remedy.

:tions foli-o>.

Sackgrc-.jp. -iriunity Invoivement

o Sununary cf Co.'n,-.;t.-"'',ts 'A&r.ty'iy:•:>'•. •.••arii.u ...he Public Comment Period and Agency Responr-HG

o Remaining Concerns

B. BACKGROUND ON COHMUNITT IirVOL""/EMKNT

Coramunity relations for the been .handled in conjunctiot'

Reeves Site has, 'ith the Peak Oil

for the most part, a.nd Bav Drums sites.

In'te.re.' t • .in the Reeves, site • itseljf . has been , minimal. What community inxereit tha't.- has '.been: jiOted'"''"'Waa;r'' 'focua.ed oa - SP.5L activities at the other two Superfund sites. The 1989 Communitv .Relations Plan (CRP) f prepared by "lieverly. Mossl^, EPA, states the following: . ' ' '',,''- :•• ' -ililii, ;;T, : " :-,1

"Cbmrûi'»ity-involvement st the Bay/Eeek/^'RsJaves sites has bean , minor to date, judging from responses, during inteirviews of local environmental agency staffs. Agency personnel from the Hillsborough County Environmental Protection Commission (HCEPC), Southwest Florida Water Manageraent District (SWFWMD), Tampa Bay Regional Planning Council (TBRPC), and Florida Department of Environmental Regulation, Southwest District (FDER-SWD) were contacted to ascertain the nature of comments or complaints received at those agencies. No forraai complaints or inquiries were on reccrd, however there have been concerns over the disposition of the roofing debris on

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Elected officials or their r.jpresentat-vas displayed general knowledge of the sices, bL',-: overt concern within the community was not kno-wn to them. General concerns associated with ground^--atcr contarain;!it v::'f\ and hazardous -materials '.cere referenced frequentiy by ofticials, but nothing specific to che Oay/Peak/Reevec :eH wa; presented.

.Many nat ional and regional enviror..'iientai o rgan iza t ions , such as Nationai Audubon Society , S ie r ra Club, and National Wild l i fe Federat ion, have loca l g,roups in ths Tompa-St. Petersburg a rea . Local environmental o.rgani za t i ons , ;,ir,ch aa Brooker Creek ?r0 3'J;rv<ition Socie-ty^ JfeL ji-aspta-BS, and, l2a,ok

:'>7aj.ton-"Leag-:c:, i-,jcri. rii-.-i x r . ' ' y^ ' i ; z}sx '^ . . : - ' ? . :x , \ i ^ ; t i> ' : ' ' . iO r.-'jiv'.la'" u6 ^ > x . 'y'^t;.:^/V':^:y;.^ri.^^^.r-.-,..'si.cq^. , ' • • ' • TpaxlZj,-:^. ''._..L^.-(,Qi:îit ' i n ' -.the

organizations has not been identified at this time. Contact with the organizations usually has resulted'in .a .request to be notified of public meetings or issuance of public documents.

Contact with ths Brandon area Chamber of' Commerce did not reveal specific concerns. The Brandon. Chamber does have a cormiittee that follows local activities associated with water, waste-water, a'"-.': .,i. ardou3 waste activities."

In the time period h'j . • • oublic commsht period

:. -ho prapar.-'tion o£ the HM."' ;:!<? and the lor t.he i;ec-/e3 Rl. 'r ' i^, no significant

''^ community relations activities for the .=.eevss site too.k piece.

The Proposed Plan was released to the public on August 12, 1932 and the publir. •:; _.-.-znont period on the preferred source control alternative ran from August 13 to September 12, 1992. The public comment period for the Reeves site was .held simultaneously with those of the Peak Oil and Bay Drujns sitea, A public meeting to dii-JcuES the preferred jioivi-.-- control alternatives for all three sites was held the evening of August 18, 1992 at the Brandon Campus at.the Hillsborough Community College, Florida, The public meeting :--:'ffiiri-- spiiroe.Vy!' at.te*ided 'nnd there ye:.-^ very few;q?'eotions from the audience." " " ' ' '• ' " ' • " ' "•-

C, SUMMARY OP CC:€2E.«?,'3 PJSCSIlfBD PDTtr - G- XIQ .'PBHiii'vC' COI ISTST PKRIOD AND AGEHCY RESP05JSSS ' ; .- y '

The'pre fe r red a l t e r n s t i v e s . preseyited for the Reeves, Peak O i l , arid Bay Drums s i t e s only address the source con t ro l . What, i f any, i s the ex tent of groundwater contamination and what i s EPA going to do about i t ?

EPA REPLIES; The selected remedy in this ROD only addresses the soils and sediments at the site. The Reeves site is adjacent to the Peak Oil and Bay Drums Superfund sites. The nature and extent

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Svzll-.any- pQtentii i l- . ' .grctt i idv'^ter. proX' ^,-' .3t, ^,~f ' • •--.r?-:- :-••-,,- - • tr&atod'- sisiulthsiôuisly.''-'i.^-'"'- ^ >y .oo-re.-.ni,J,'i ,{/rou,nav«Cf/r :;raijie.Mi; a t the.p&ak.pil:aridiB''Tyyp.r\tm3':<3ite

^(,o;::::-.0y:''motuiX;i^tiri::''

. •'iiii'i - t h e ' - s i t iB . .be m^ :nake' s u r e the ' re i s l -dy works and;.' if."- .-30//hdw':.long.wil..'). thk. rK^m- .r- .'.ng c o n t i n u e ?

'i(i ' '::i:''.'. :;-;: EPA--RSPLIES::, •:-u'heV^ni.-t:a:'W.t'l. 1 b«? mrsnitored to-maks s u r s t .hat t h e r e i s ^^,f^.;'.\-:^-i}ivitW}':Jai:^^ l"eachirig"v:y',of;. "contarainants^ ;" from'"--the-: $^-"lS''^*;:vi.-i";'?^^î^?^ °'^- c a l c u l a t i n g , costay-^ÊPA-.-: ' ^ ' ^ ^ • ^ - i - y . y l ' • - • ' ' ' ' • ' ' — ~ — ' — " — . . • J - ' • — r • • ' — . • * " " . ' ' ' . • • - . - • - . ' • • • • . ' . , . • • • . ^ . : - - . - . . > • . ' • ' . • . . . . . . . . . • • - . • • .

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both t h e Adaiinia t r a t i v e Order ao'.irc« c h a r a c t e r i r s t l o n PI/FS co.i't'.-jrriinj -ir.s =.z' •:•-•:.'-•:' •-;-.-••••.':•--

>e r . Consent JAOC) concerning tho ;i>ocket s S'i-IT-C", .*nd chts • -- -' - ~ J >'.- 1 r-oc."'-;.:? t f 3 9 - V 5 - C ) .

t h e s e A O C s , b o t h s i g n e d b y t h e R e e v s a •Coj:yoi:iS,zx-:.:'., ;i:-,: ';.-.•.•.«••:;cip; of the site included both the SEG and SEW facilities.

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The "Risk Assoasmenc" s e c c i o n of the Proposed Plan st.atQS t h a t 'The c i i ' ka d o r i v e d f o r tho p o t e n t i a l f u t u r e grou.TOT 'ater pat.'iway f o r bo th work'.'!-.t o r o n s i t e res id . ' sn ts exceed the a c c e p t a b l e rango f o r bo th yi-.t .-.. . i l lcw and de-apf.ir F l o r i d a n a q u i f e r , t h e current sourcj of munlcip-c.]. f«'.-.r,';r s u p p X y ' . ' I 3 t h i s s t u t e x e n t not m i s l e a d i n g , i n t h a t iv L^p.: ies t h a t t:.. ' - - y ^ c i p a l --••'ater s u p p l i e s are drs-im from t h e aquif&z i n t h e iattei,.;' . - ' c i n i t y of the r i t e ?

from"

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source of municipal'water 'supplies" in":thQ"-rampa"-&rea-';--

D. REMAINING CONCERNS

As a part of its overall cor.a..c.'. - on the preferred alternative, the PRP foir this site submitted comments concerning documents included in, or excluded from, EPA's Administrative Record. Because these comments do not address the selection of the remedial action in this ROD, they will .be addressed separately from the Responsiveness Summary.

There were no significant concerns expressed during the public comment period about EPA's preferred alternative for the source control at the Reeves Southeastern site.

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SUPERPU?<D PROPOSED PLAN . .\"D EXPLATiATION OF S I G . V I F I C A : : T DIFFErRE.NCrS y . \C r SHEET

REEVES SOUTKEASTtiiN SiJiî;Ki Jr,!. . i l : : . . .

EPA

Hillzborough County, Fiorida FE8.fiU.-VRY li)33

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KPAV, pr-'r"'"?'.' * c!r:.'.'>itip altcniiitive J'or th'.* grouiidwuttT at the ailc. Th<j Proposfid P!nn explain.s the options EPA c\-aluated for Operable "unit Two, the groundwater. EPA, in cons'-iltation -with the i'lorida Department of Environmenta] Regulation CFI^Si"'.), -.viii JcLv- a

. final remedy onlv after public comments have been considered. Terms in bold print are defined in a glossary at the end of the fact sheet.

As a part of this fact sheet, EPA is also issuing an Explanation of Significant Differences to notify the public of a proposed change to the selected remedy in the Operable Unit One Beoorrl of Decisior..CROD). Operable Unit One addressed the cleariup of the soils .and sediment at the site. EP.A. 'issues t'nis Flan and ESD as

- part of its pubfc pivrticipation responsibilities

iLidcr Section 117(p) of Use Compreher-wive

,,11.' "l-r ". v"^'-'-. -,-.,,7,••,-,' :•' Inf'OraMiUoui' iCspiJiaiuity tor the"" fo«voa "'irte c;in bt- found ot thc foUowing loaition:

BRANDON PUBLIC L]BP.ARY H O U P J S : 618 Vonde.'bufij Drive Monday-Thursday: 9-9 Brandon, floridii 33.511 Friday- 0-G (813) 654-4068 Saturduy: 9.^.

Se.'id written comments prior to the dose of the comment pwriod or address questions to:

-Martha Berry, Remedial Project Manager " O R

Betty "Winter, Commiuiity Relations Coordinator "EPA, 345 Courtland Street, NE,

.Atlanta, Georgia 30365 l-SOO-435-9234. .

i" • ' ! . ;• • i ' l ; -

Public CoininEnt Period •

Dales:.' February 20 through March 22, 1993"

Public Meeting "••: -D a t e Febniary 24, 19^3

,. "Erne: 7:30 p.-in. • ; ,', Place: Brandon PubL'c Library , ' .• 619, Vonderbiirg Drive- '•

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-'Hil!3borou-.fr" •*'l';r-tnt7, Fiorici;! " S;H-.thf'.;ijiorn G.iivanI?.;:": Hi'.:.-. . ." . 'hr? 17.36 cere facility lc<uti. .'i .o thf noni-. -'vi-j ci SR 574. The Reeves SouthoiVjtom Wire Division (SEW) is the 11.6 acre fadlity located lc the s'-.nth of SR •57'!. The Ree-zes Sile is ir. close pro.ximity !•:> r'U' ?•- 'V Oil/Bay Drum Superfund Site, The three sites arc sho-^n on Figure 1 on page t.'uec.

Tho brgest building on the SEG facility is -wfjere commercial steel products are pre-treateu tuid galvanized. There is also a small office building and maintenance shed. A small rectangular area in the northwest comer of the maintenance building contains a 300 gallon tank that vras pre-viously used as a catch basin for ^vastewater generated during eiectroplatii-ig acti'.-ities during the 1960s. T~wo inactive liqtiid waste

,.percoIatio,Q/evaporation ponds,are located i:i the ,"ft.or):hHiSjri'ij ,.part,.;.'Of the: area;", a ' :ist ^•v/aten-,. pretreatment facility and a double-lined storage

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rThe;largest,biu!diag'bn t^ is -where steel vidre is drawn, weaved into chain link" fences pre-treated and galvanized. The smaller buildnig on the fjacility is an oEGce buildirig. There wais.a percolation/evaporation pond, now backfilled, on the central -ivestern edge of the SEW" property and two fonner pen:o!ation/e\'npor;ition ponds on the sout'n-vvest portion of the facility. The SEG facility ^vas orlg-L.-.c\liy built and operated as Acme Plating and GaJvanixing

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The SEW facility \vna britin.illy built in ISSS'and '0pcrtte <3 5w Florida Whblira.-52? F-jr.ce, Inc., 'a subaldiar:,- cf Rf-'---t\ ^^ \. ••-. Througli two .">i-r(;'>c. ., riuri'ln Wioif.îii' 1 ..jii;u bocamc the SouthcMtern Wire Division of Reeves-So'jthO;iu?tcri\ Corporfltion. The- firaC percob.idtin/evaporution pond for •iisiroa-:-'.; of SEWs waste"*Btcr •wa.i b-aijt in 1955 and v, is iised until it was backfilled in liie late 19603. Its dimensioiis were RpproxLT.af.cly 75 feet long and 25 feet wide and vms located alocg th.e ccntrr,] ' western border of SEW. A seco.id pond •--•-;::• constracted prior o 1969: it wa-s sulx.^mdec! in 1975 to form the t-wo current p>onds in tin; southwest comer of the faciiity. Both ponds ore Pfproximately 35 feet by 35 feet, and are surrounded by a 3 foot berm. The ponds were excavated to a depth of 3 feet. Discharge into these ponds ceased in 1980 -when SE"W began iising its pilot wastewater pretreatment program.

.The- U-S.' iS?A jdid.i ,s .te in-'/estJiôiii in ,}981, . that indicated elevated aicLal levels iii surface

, water and:groujQdwate,r-at the.SBGfacili^.

' Subsequently, j, t i i i ijiBlorida Department, of. ' Enviroraiental B;eJai|{,tioq (FDER) conducted a

survey of the types and magnitude of chemical contamination at SEG; this survey resulted in the 1982 placement of SEG on EPA's National Priorities List OSfPL).

Reeves contracted in 1985 with ClI2miiU for a t e r r a i n conduc t iv i ty su rvey u t i l i z ing electromagnetic induction technology tc be performed at bolh SEW and SEG.

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=. JS.qn.'iTpii-^B^-a wo^lsi p-e}fjirjp._ii^fjiivxy.js>v.iro'i^ ', "î;:"A-ijt-i::P:/^^::'''. r.""?''"- •-?;!*" tV^-SoSi r ; : ., ffiv„:KV':iii,r,'":T; pc!,--;:.:.-;,,. .,--, ••'•-ji'V'i-.•f'-i,-r'".":'r,i5 ti:',: ..,?;«--.i,ree ci.aTroii'vKi/i-'S •J-'.'-ih.-db.f i KO a;i5 SSW'-

. • ;.'-,..:(ic."':j.'i-"i, :...s..^jj:rtsi^'Cy..,.-^'-...i'si^".:.::.^sir^..:u.j^.: •/j;ârc3 ?;!t" In additiort, m 'h'i sciirce control "RilTFSs;ti:;- Pfr;:5;03'ii:-in :X^y Drisiris'PRPs-aria"" the Ro';ve3 Corporation ,.,y. •••••' •.-, :>. sepitr.ite AOC to pêrform an ari>;i-u .: '1;. . •'• j^c Rl/T'S. 'I'he area-wide grfjundwfiier ltl f":? and ;h.-: prefoiTcd aiteroalive !:or tl'.e Reeves portion of the gro-.ij'.dwatf^r remedy is the .subject oi this Proposed Plan.

The source control lU/FS -was completed and presented to the public in August 1992. A public meeting was held at the Brandon Commimity C/jUege on August 18, 1992, at -.viiich the Agency's preferred alternative I'oi ut^ Reeves source contro! cleanup plan was presented. The preferred alternatives for thc sour-oes at the Peak Oil and Bay Drtims sites were also

• presented at this meeting. The preferred alternative .presented in the Reeves August 1992 'Proposed Pian--was;in fact, the cleanup plaa -ihat;" wns selected In the Operable Unit One ROD,

'October 1992., That.cleaaup plan conasts of the" following: excavation, of containinat^ soils aad sediments on the SEG and SE'W fadlities; backfslUng of.fexcavait'd jsriias with,,clean. SB; solidiiication/stabiUzation; of the contaminated . soils aad . sediments; disposed of the solidiBed, jcoaterial above the vrater table, on the SEG facility, and cappir.g of the solidified material -with a low permeability cap.

AHEA-WIDE GEOLTNDWATEE REMEDIAI. INVESTIGATION .'.ESULT

The area-wide groundwater RI for ths tliree sites was divided into two pliases of Geld work. Field

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T-va ftO(>.uf'Cr ,w3t«-rM ikrpitrct^ h-.- ,-i rLnycy <nw-pc.TJcabSi'.y la;.'n;'r u-ero iderilU'i.-.i i'.'. tin- lou:. '.'"?•.•-' upj-wr. or sttrr'ictnJ, aquif^T i;. frof.: S.G lo 'Al ic^\ '.hifk -rt-i-.h n s'^tlire-led U-'id', -.'.-;' '. i'l r.!,>iiMt 6 ':'.- ;\~, f':-'-"., T1:t: furHiji-U .iCjuifdr L'. J'./r-rfr.iy'ii- .ilv-COIJttvCii.'AJ^ 'ill t - ; e ^•••J:"LtAC- vrtVi•;'r^S i^.' -'i .'•I'.R'r^ra

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.^..c.-;:, '..-4!;;,:\ys,.:J. v:;„"-v"•" - y y y : : ; iy.-. y.-;^.'. Bypass Cfis:'i flows in a v.-est-north-.vcslerly direction 'at the site: "It iii the priirwry source- oi' dri;tk.ing wutcr nnJ '. -afsr for 'u-idtistrLal use in Jlilbhorciuph CouriM. ' "wo-.-er, ibcre nri- no v. .-•'.'.('.(''•'.' v-''b. whi ch urf: used for drii-iknig v.iile,- U! th.; p.-iic-d.! vioai'.y of the sitp.

Groundwater Itve! aaeasttreraenCs of Cli£ surilc'Lal aqiiifer were taken in January and .Septe.mber -ji 1991 CPluises I j-ind II). PhfL-ic I was taken du.'-irig the dry scos.'..; Php.se TI duriisp thc wet season. The findings in Pl-iase I indiciUe four grouiidvi-ater CO-A- dircction.s, radiating from a hi:^ gro'jndwater level nu-j-k in ths .lortheast coraer of the SEW property, l l io flow directions can be seen in Figure 2 on page 5. The fmdings ia Phase II, taken during the v/ct sf::-:nr;, indicate three grctindwater flo*.v direti.Jo.-:.s ,-.>;!'J

, can be seen in Figurc 3 ' o n page 6., Tiv.; iiffcrenee 'appears' to be that, during- the wot season, the wetlandii di^chargi; v.-ater into thc

vsurfidal aquifer. - "IIMS causes the north-,'/cst^. cotiapoti^rit to be the docodnant fiow pattern iii. tlie area; wliichijis .'jsparatedfrom the southeast and southwastj,'.companeats by an east-west;', trending gf-oundwater dividel During ithis time, the (fischarge point for the upper extent of the surficial aquifer appears to be the north flowing stream. During the dry season, the siuficial aqtiifer serves to recharge the \-arious surface water bodies and flows toward the various di'uies and wetlands in the immsdiate vicinity. This restilts in tho stronger southwest component, as ca.n be seen in Figure 2.

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'V.y\< .-•jsj'iyt-.-'r ' -2sa^,s frotrv f' aquif-jr dv. :• '•••'' i.-^jpacls pr'u • ten wells iompk-'j , "'-Veli F'.<! ; i . production wclU :tn(l '••'.'cr'J 1-; p?cd-jctic.n weH!. W'tiiU F2 aitd F 3 cnnirir.iid 33 and 15 VOCs, rcspcctivtiy. 'j"lio3e coiiUirtiinitnis a re ciot thought to be rclaicd to thc Reeves So-.itheasteni Corporations 's activities. The re svcre levels a i l;-.ii.iii!'jtot;thy(ene (TCE) foujjri in thc two former production wells on the .ÊG facility. Ho-,vever, it is thought t h - : this resuJt

ffi(\ wa"; a function of contamiri.-ition o f the well -,\'atcr ^ through leaky casings in the weiis t;j_-;i..j._: ..:-a,

not a result of a plume of contamination in the upper Florida.-: aoiiifer.

In suamuirj', the RI "identLHcd tfirec areas of concern: the northern surficial aquifer, which is primarily impacted by metals; the soulhern

•-.'. • y" .:su!;-5ci'il- aqipfj?J:.v;ifl;;iiic ^ by. VOCs, ' '''" S'^'"OCs"",''""and''met-Bs';'arid'"the"'-'t;ppe"r' Floridan'

aqtufer, wliich contains levels of VOCs.

•. ' . SampliCLg.ojF-t,h& surfnf s v<aters and sediments .in. the several nearby wetlands was perforined aa a part of this RL However, this Proposed Plaji only addresses the proposed grtrund-iirater remedy. Therefore, those results vrill not be; discussed as a part of this Proposed Plan, but will be addressed 'in a later, separate propa.';ed plan and HOD.

RISK /iSSESSiffiNT

l l i e final pb.:iS'i .•;•:" the RI included un assessment of -.v'fiethcr e.xf.'v.tirc or future contact v,-it!i

.~ . - r , » . . u;n

. ' 1 , 1 .i.i;0.cr cudKl ;»-'•.••• -.-. irinientiO rwU, 'T't\~>

ri-î >;>;..- • ..'•nv-n'. J?-terniiiU'<l lui esunvile of ri.s.k .'. - an:uvT EP . \ tor't n^ fvirthfr jwrtion to iidtlross .» •.•,:!.,iii-s..t::iii; ir. iii • '.-.-uiiii'S'j/i'cr nt ll-.i .-ilti'.

" o la: c-ri.>:t' 'rr<'. v-itliin FIPA'.s W.fe risi: ruj-i(-;r, '.IiC a-\^'rv,ivJ r..-». <•'"" .-. l•i •o - fror:-. c.irr.tr.;ii7-.'-.!-.i• •-•/v.-:r.,:-. ;v,i •..•;" :'.-,{.-ti'...!i''i .-<.i:.u':;.-f! i-n ;jn <*•;.,• .•:-.';-.-.'. mviuvjuvja: uJUi. i.-c ;;L _;T:;t;::.;- ;.i\:«ii ..'tie iOitiU^îvi: ca.' e in ion. t|:au,'yind H . T 1 0 ~ ' ) ruid prt-ft-nibly na rr. -:''"" thaii lan^ a'it'i'ipn.il rjist;, [a .oot; million •;:; '5-""T: ''.j;T--"i:s'?"'V8^r, > i s ^ i . ^ ^ ^ ' p i i i ^ A i H ' '

: y i : ^ ::jSa<iA ^

HcwevtM-, ..futiv*' iii-t.' ccetmrioii "associated wfjtli'''" ingfstt'Jrt of groi;.idv.ît>ei*by ar. onsite -worlter or onsite rfrsidwjt pores uu' .^-- - irthlc risks in both 'ho £<trficiDJ !"'<\ *•':•; upr.'.r Floridan aquifer. Tit; arcinogetyc ri^ks VTC. pri.mari!y drivrrn. by the prr!-;vc!,\~'J of i,1-DCE, vhiy) 'jhiorivl-:, 'rm'.! arsJinic.

With .-(iiprd to no'i-carcinogcnic chemicals, a numter of factors are tak.-'.n into u/;connt to calculate a li."jtard index for e.nch chemical of concem. IT the . \-jrim.«it5on of the ha-,'-.arcJ indines for all of the chciTiicals of concem is jjreater Lhau or equal to 1, then the levels of non-carcinogeaic chemicals are hij:;h enough to "no of bealth I-T .cm. There arc no current use scenarios where the suranwtion of thc hazard indices meets or exceeds 1. However, in the futiira use sceniu-io for bolh the oaîte worker and the onsite resident, the summation of the hazard

• ' " • ( ' / t ' f . . .

indices Is^'igrehtcr than 1." 'The--nr>near!Cmogen3':t, risfc) are primarily driven by 1,1-DCE, zinc, and njiphihaiene, • •.;'

. Some, of'; the contsiroinants .diijcussed • m- tfaii; overall riak assessment were not related,^ operatior,3 at the Reeves site, but rathe'f,i»wc"re "••; associated with contaminants at the Pesik Oii ajid Bay Drums sites. This l'J disci.issed in more detail Ln the next soction.

Actual or th.-eatened releases of haiardous substances frcci this site, if not addressed by the preferred alternative or one of the other active measures considered, nxaj- present a current or potential throat to public he_,Ji, welfare, or the

Mr ;-3'"C:;

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"ti. ' .".ir.r.i -It.

SCOPK OF H I E j'KOPOtiEJJ AC"i;-:'. >N

iliLi Propc.-;t,"l V'\^l\ a/Jdrtî.'c^ orjy •.•;l'-»ji:-ni;. .vr-.h • ;C"ouniI-*i?ritcr In the north^.m ivirf^tai uip.ij'i-r. 'llie cleanup of the scutlifrn ûrfet'iai a'tiiii'v-r ar-t) thc uppi^r Florid.m aquif^rr are a-ilrt.'-.,;.".l in a r.<:[/irale Propor,ed Plan iiiui.-d Ter ths-:y,,\iri''-!V.f-r '•' t S ' ?i-.<V O-J \r.d 3tiy DruJiis sitci. 'i-î-i CLtiictui .vJtj .: .-.•;,..'., : :,.. - ,: ,•,: *'"* aqtiifer Gov.' direetJoni:, tiit' ccafming tayijr

1,crid"in xt\.;"

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: - r . ' , . . - , . • , „ : • - , ' . • ;

Th..- ./:!'--l";Dt! opdrarions .1- •.'• deta"il latQT' -Hddrcssod in :.<

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& ''':.-U&".| ?'5.:?,'''.'^'S:f •.

'oe 3ei: n 'tn Fip,iire 4 on i'.!:;- ,<.

Ar, stated beforf;, tho Pisk .'•''.sot.s.---ment tl-.at wf.s done for the groiind'A;ater RI/FS did not di.CTtu'ent.iit''' h';t-,' »' n the contaminants that were found in thc northern, southem and Upper Floridan aquifers. This Proposed Plan bcporates the chemicals of concern reirultii'.^; from thc Reeves site from the chemicals of conce.T. resulting from the Peak Oil and Bay Druaij ii...i. The methodology used by EPA -was to compare the list of Indicator chemicals that were determined to bc important 'in the Reeves Source

risk assessment to the list of iv. !•,, t h e ' Area-Wide

Groundwater r"i£k a.sscssmenl.' The indicator chemicals from t h e B e e v e s ' s o u r c e , chomcterizatioi!, -.vera as follows:

o arsenic ;., ' - •, : : " ,i ',;•, p cadmium 6' chromiutni o gold o lead o mercury o nickel o polychlorinated biphenyls (PCBs) 0 polynuclear aromatic hydrC'<aarbons (PArk) 0 l,2,4-tridiloroben2ene o zinc.

; ,(I^^Jaracteriâtiorl risk ags "iridieator •-' chefeicals,-:;

; : '.,, - • : . : - : r ., :..^..-'. - . ' :. r i ' : \ ^ .0..*

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' j ^ ' . - , h c v i-% er n.^ pAJi . s "!\.i'.i- <-VIT l . w i i

>>• ^•-ir.lu'ij Vi-iih tt-,.' Ui'i". .• . •>;i'>r.<U.->!i. Tii '^ VAM-.

i.v'-rv - j i r i i id fO in \l-.\. V„r\-\'-:. •« ."•

c;'_ij.^.:'l''.-";;.iti,in r\.>"ii a;v-^-.^..sliunl t v v j i u j f of (ii.î.-

],T---cr:.::^ <r. \]n- :.rii.-. '. n C i r v.«.-:•.',I'.-i^ iM'.rii^!' i f

•.:''.• .--:.•'.', '...L-.'Jr.'. . 'Jv; 'fvivr \-:n-.^ r-.'.xv.'miU-i'i '•.-.;

«5A,!-ax....v;.:.;; U;; ?".•.;. Oil i H c . y^ t r ' i n i r ; /UM\K n u t

roujtd in the groundwoi r in level*.* nbove tht? ,,:;--itl5)y eslnl'.lbhod ,.MCL of 2 wfA lîij? . ' ' y y y i i '''•• •'"'' "'•l^'^.y^-pi^^.h,'':'^... fV«U.>'i>nr(>^';j:iit-; 'jr>. '..,'„,,,.;•

' ^:.':.:-;• • z.•: :y'':^^'ii-y'^\J^'.<^.prv.\.n^.^:.-\:y'.li'\yyi^ " '.'•' '..: ' ,ib.;iutrb,aii:v;'.,.V,Lj;o''Ri;yi£r: L'lU: '.-'';"" " . ' _ ,",-";',••'

" ' • • • • • • ' • ' • ^ • " . • ' " ' ' • ' ' i - - : ' - ' " " ' - l i t " ' , " • • . . • , • : . ' . ; : • . : • . l ; ' . : , . = • • ' . , . • , • > ' . • c arsenic .,.„,.,-,,,,„.., ^ ,,,,..., .-_.

0 cfidciitira''"' '• •'••• 0 riircmittir, .1 ! . ' . ! ' !

0 nickt! o rJn.;.

.•Vfter review'ing tlie above list, tho Sla'u; of Flori'itt had one addition, altrniinuni. This addition is biscd on the ehwilcd levels of KliiniinLmi in thc groundv,-(i'ker and in nowly prcn-.ulgnt~J State regulations mandating tliat sccnndarv' drinking •water st-ia-Jard? he enforced as cleanup goals in Class GI and GU aquifers. Tlsosc regulations were not a'/ailable when the or'~.uni rislt assessment list w-as developed; therefore aluminum was not included in thnt list.

' Cltanup les/cls fdr:'lftDdciciontainin£nLs;|w'ere.tVlft^ ' -.., • selected to protect human health, v/clfore arid ' •"'' '" the •'Bh'virbnment and to be in compliance with •appUcable dt' ifrejle^rsnt atfd appropnate leqiaraoeEto: (^JltiRs)..^ The cleanup ' ieval's selected for -the con^Jamihants of coaceiU hi the • • groundiffaler are as follows:

' \ mm

Contaminant

Aluminum

/"vrseruc

Cadmiuin

Cleanup Levels {}if0^;}^^ 'W.

200

50

5

" % ; • ; ,

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COWFtt-ViCi ROUiiOWi' Alio AflL^ C'' ll.lPACTCO GRDUHO '^'AluR

nofniiEiRff s u R n c ^ i AO'J!FE:I! DA'l' DRU -.S. P&s.K OIL, A.'IO RLP- 'CS

S'JPERFUSD SITES UWFA, FLORIDA

POTENTIALLY RESPONSIBLE PARTl'ES

En.'ii"onms'nta] .-i.;;:. > - 7 - i 7

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• : ' l ! ' . ' ( ;

111 •.;;(,• F S iis

(Contingency P l a n (J^CP) also requi res i hc development c f a no action a l te rna t ive a s a basis for co.mpnring ovl'ier aJternaiives. Ho-.veve-, tht: groui-idwater F S '.vas developed in conjiunnion iivith t he source charac tcr iza l i rn R l / F S and assumes t h a t sorae tj 'pe of so-orce control remedial action -isil! be ur.plem-.r:it';::; ..-'.::•; - -.-ith t he selected groundwater remedial action. T h s t r a e no action altermitive tb.at is p re sen ted h e r e

. ''(fas ; developed,,; a s ; a par t , ^ of t h e so tuce

'•.oharactettzattq!; :E]/FS.r.,',';Sadi; -aitemaitjv;^,- j ' d n ,.,creened ti3"ing t h e nine cri teria explained in l"ne

.,- ',ti;s on,page 1 1 , - . ' ' i ' " ' ' \ ' 7 i • " • ? , • ' ! . ' • ' j i " ' ' • • • : , : " : • • • • • • • , : •

NOAcnioN;ALTEPJ<r.4Trv^ ' ": •' •. •

As s ta ted eariier, the,' NC3» requi res t h e development of the" no action a l t ema t ive a s a basis for comparing o the r a l ternat ives . Therefore, tliis a l ternat ive would m e a n no act ion would b e tnken to reduce t h e r i sks posed by t h e groimdwater contajcaination. N o res t r ic t ions would "DO placed on future use of t h e grou,nd water ; only ground-A-ater monitoring -A-ould bo do:ie on the site.

TOT.M. COST: $29,000

"v; N'.. .'vl.TVJ.Ji.V .".'vK 1

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... •--.,•' -:-r-.rv-',,T! •'•r ' ><',- .-•'. 'uir'tK: conti-ol r^modLMi "-••'V,,,'^'^,*^/^ !"c»f . , i t l s^^ :s cf ccnSsaL'itji).-',,^. ,!->v- :'-"( .,, •,• ,;,, ,,'••• 'i ,"v,-, •,jtv..>-•v:''!'-te'<;Ji" ." ' '^ ' Zy'â^y-. ,^fi>^%',/ '- ' ' '*^': ' ' , ' 'y

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PJl.'rf>;niAL ALT^ :H^T. ';'l ' f ' 'iA

* ,,-\i±rs-"0 Gr^.u;.-: ....:.*'r'rTi.-aU.ucjil

/ilterai.t.ivc' 2A -.'.'0.' -Ir-.- Jii 'iT.y^-i>j:w-:} iji-o'ur.d-.v.-itsr

'uhat mi l be cstrticietl fr-om t h e sui-ndn] ."iqiufer [rom ."".n csliin.'ited number of five extraction w.nlk. 'Fne grour.d',".-alar will b^; t r ea t ed 'ny p. che'i 'j>il precipitation pro<;i;;:» followed by an ion lucchange j-/?)L"5hing syst t ra . Tlie t rea ted grcôndwater wLii then bo discharged into tlte unnamed creek arid -.v'li! coniply vnth applicable surffice v.-ater discharge criteria. Groimdwater modeling done for t h e F S es t imates t h a t this

''-;v,;'i^gjocete; V:-ii!.clead,: u p ' A e ; g r p t m d s r a t e r ^ ^ ;••, ' "estimated i year period; as opposed lo t he l.Q" '" ' ' ' ' " '

years estimated, i n Alternat ive 1. Thi"; 3 yeiir ' • period also eppTied'to Al temat ives 2 B a n d 2 0 . ., ;,.

••' ' T o l a ! ' C o s i : ' ' ^ ^ s k r n O . : ' • ' '\ y : . , . / - •

REMEDIAL ALTERNATIVE 2 B

" AciivE Groundwate r T r e a t m e n t

Alternative 2B will t r e a t impacted groundwater t ha t w'lll be estnici.ed frora, the s-arficiol aquifor • from a n , es t imated number of five e:'.tractioi-i wells. T h e ground-Aatcr \s-iU be t r ea ted by :i chemica] predpi ta t ion process with subsequent onsite discharge by a n onsite spray irrigation system- T h e t rea ted gronndwater will

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XmBlcmaitcbilitf - 'Refers to the technical feasibiUty CL,-,d t.i.-irrJn.istra.'iuc case of a r-;mc.dy.

Short'Term. Effsrtiv^ness - Lenftth of time for remedy to achiei>-.: protection and piyu-nliai impaa ^ of construction and implementation of a remedy.

Long-Term Effeciiu^ness - Deg.-ve tc uihich a remedy can maintain protection of health and environment once cleanup goals hai.'e been met.

'v'^xfcîjjrt 'ofTadciiyi ^TctJay, c r Y^ltMis T J i r a u ^ Tr&<3&msni'h Fefjety^'cxpscte'df iKrformancp • • v?, o;"r/;t: treatment technologies' id'lessen harmfii! h'nfiire.'TT.ose'.Tient or'am.oiint cf contem: i'naiit's.'"'"^

Stoic j\cc€ptancc - Ccniiderttkon of-iîalti's-opinic/i iif Cic preferred cdtsmeiiuz.

Communitf Accepiantx:- CprJisideration of puhlic cominents on the PrvposedPUm.. . •';;•.."

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Al temat ives .1, 2.V '.v3 a.'ul 2C oro till cqi:a.!.'y effective a t providing oventli proU'clion of hunuin JiciiJth and tin.; •,:;.•.. ..;..,., ;-it. I ' he nc action a l te rna t ive is not protective of human health nnd thc envi ronment .

Conipliance wi th AKiVIla

Al temat ives 1, 2A., 2B ojid 2C comply v.-ilh rclr.vont Federa l and S t a t e AliARs and with Supefund 's preference for t rea ln ien t . Because the no action a l te rna t ive does nol comply with t he first two criteria, it wiil not bc considered

, furthor in this analysis of a l temat ives . , l ! l : ; •^-"a^. ; ,„ .^ | •- , . I ' - : . . , , - ' , „ " . •• ' .- . ' ••"; . y j , , ' - . . , . : •,

Long-Terra EfTectiveness • ' • 1 ' , •

Altcmjitives 2.^, 2B and 2 0 a r e all equaUy effective a t providing overall protection of h u m a n hful th a n d the environment . Al ternat ive 1 •will provide slightly lesser long t e r m efTectiveness, primarily because of t he length of t ime to r each the cleanup goads.

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Cost

T h e co.-nparalive present worth cost? of liic four al ternat ives iiro as .''ol'o'.vs:

Alter:-..jtivc I 5140,000

Ajicmtitivc 2.'\ 52,7.50,000

/Mtemi t ivf 2B 52,210,000

/Mtcn-mlivc l C S2,.j00,000

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;i^*u: ani i Conim'UDuly Accsptjioce

These cr i ter ia will bs ci/alua'ted a f t e r t h e public comment period and S t a t e agency review.

EPA'S PREFERRED ALTERNATIVE

EPA' s preferred altcrn;jtrve is Alternat ive 2 0 . Based on information current ly a'vailable, E P A believes t l iat Alternative 2C provides t h e best balance of trade-offs among the o ther

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^•-'t TAiii £'Sn ct.'.-:.>-i.s:ts or one iscdl-îc,'?tj.-jii t o tht : . â lnc t ad r&iondy aa o-jitllr-ed ±n w-:s Opar<3hlo U n i t One R<fCor<l c f Dcci-j.i.an, -Octcbor .1992. I n t h e O c t o b e r F.OO, i t i s s t a t e d tb^. t , "i?ocs(.-.';.? ti'.r. ,<iAl«sct!9c/ ,'S«i.'ri:'9 c o n t r o l re^Têdy -..-iii noc r e s u l t i n h a s a r d o u s s i i b s t a n c e s r e t a s i n i n g o n s l t s above h e 3 l t h - b a . s e d l e v e l s , t h e f i v e y e a r r e v i e w v i i i /:Dt a p p l y , t o t h i s ac'f.'.io.':. •• .- .dificionai flna,Iysi.s nf S P A ' B F i v e y e a r r-«v.?.(ju' p o l i c y i n d i c a t e s t ha . t , b e c a u s e l a n d tzse r e z t r l c t i o n n v i l l h-i r e q a i r c c ? t o p r o ' t e c t t h e j r .onol i th t h a t w i l l r e s v l t from c h s a s l e c t Q d sourcis contxrol .remedy, a t l e a s t ons f i v e y e a r revioif -will b e r e q u i r o d . T h e r e f o r e , t h i s SSO m o d l f z p s t h e O p e r a b l e Un i t One ROD t o r v g u l r e a t l e a n t ona f i v o y-cur rn-j'iiiv f o r ;-'•" •:• • -'co co.-it.roZ remedy s t thg s i t e .

T h i s ESO does r .c t a l t e r t l ic f a c t t h a t t ho s e l e c t e d ce:nody m e e t s a l l ARARs i d e . n t i f i e d a t th.G t j jus of t h e o r i c S j i a l ROD. I t s h o u l d a l s o be n o t e d i^hat t h i s ESD i s b e i n g pt^blisherz r o r p-jirposea c f p u b l i c n o t i c e . Un l ike tS-ie P r o p o s e d P l a n p o r t i o n s of t h i s document , EPA i s n o t r e q u e s t i n g publ .zc cc-rtrr-i.-ic cn t h i s ESD.

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Adoiinistrative Order on Consent: Ajjrecmcnt between EPA smd private parties describing actions to bo taken by private parties at a Superfund sitc.

Administrative Record: File containing information \ised Ln selecting a response aclion •andsr CERCl^V CS.RCL.-\ aj:id the NCP require Uus file to be a-vailable for public re-.-iew at or

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HiSf .usu{fi!y.:wiJ;b at) information

mm Adôrpijoti: Stickuig pCi-DCieciil^s ofa gtis. liquid,

'f-(jr dissolved'. substsiit& -iio a •inrfa-'ie :ôlso ",î;,'0'^|srs«?^:-, • , •, . I '•

• AppUcable or Belevaat and xîjpropriate Requireinenta (ARARs): Clean-up standards, control standards, or other substantr'/e environmental protection requirements, criteria or liauUitions prom'aigaled under 1'\;deral or state h'.v.

Aticnuation; To lessen, wcake:: 'P.:.Tppear.

Coajprehctivdve EnvirtiUMeaLa" Eesporwe, Compensation, 3sxd liabiiiry Act (CEIlCSjC): The Federal law which created a tax for a trust fund. corarr.cniy known a^ Svp<^!rfand, io investigate and clean up -aoregiJated or abandoned haiardous waste sites.

Dispersion: Breaking up and scattering of substances.

Eisjiliaaiion tif; Signi^qaut DiffCTenccs: This is a documenl that announces jin iiicremeiital "clidngc ' to a component of the remedy that, while signiEcan*.; does -obt fundamentally alter the cvCTaB cieanup;|piQii. •

FBtratioii: Process of removing impiirities from a liquid by passing it through a porous substance.

Granular ActJvat.-d Ciîrbon (GAC): Tlie use of carbon to adsorb hinzardous materiais from ground'rvator.

Groimdwater: Water found beneath the etvrth's

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Monitoring WeH; A liole or s.b.'ifl sunk into t h e ear th which i-s p^rrii.'-L-. ,::,> .^licapl-i-d to evjiliuit,-; the hydrogeologic conditions and quality of groundwater undcr'n'ing the site.

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National Priorities iJst 'U 'F.'--): A lii-tLro ; ' uncontrolled or alxindoned Iruardous waste sites identified for possible long-term remedial response -ander Superfund. Sites arc proposed for addition to the NPL bo-sed on theix HRS score (over 28.5).

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Potcnti.-illy Responsible Partiea (PRPs): Private parlies who may luive contributed to thc biiziirdous waste at a sito, who .-:;:iy be held liable

.;-for,^t;idy£u^dcl?ûp costs u«def ,CER(^v. , . ,

Preferred Altem.otivc: .''vftcr eva!',.i.iting \-a.rious remedial altematives, EPA proposes the altemative(s) that best meets prntecUvanessGuid other factors.

Proposed Plan: A required ptiblic, doctunent in which EPA summarizes cleanup options considered, its preferred clean-ap strategy and rationale, and presents any -waivers to cleanup standards of §L21(d)(4) whach might be proposed. The Plan must actively solicit public comment on all fLsoect;; of Uie Plan.

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RECORD OF DECISION, OPERABLE UNIT ONE, REEVES … · site, if not addressed by implementing the...

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