2 5 EC ;

Bob McPhersonStats Planning DirectorOffice of the GovernorAustin, TX 78711RE: Intergovernmental Review of the New £PA Lead Superfund SitesDear Mr.On October /, 19F .4 , tl><» U .S . Environmental Protection Agency (CPA)l isted the orcposed usxiates to the National Priorities List. InVI the EPA w1l 1 take the lead 1n studylrui and cleanlnc un three oft^ese new sites. These sites are: North Cavalcade Street site, SouthCavalcfl i * * : Street site an* Koppers Co., inc. (Texarfcana Plant) site.The following enclosures are provided for State review ami comment*Three* o* the enclosures provide site specific Information. The fourthenclosure, Description of the First Phase Activit ies , is coraraon to eachof th* sites,The EPA plans to al locate fon^s for all three o* thes* sitesDecersber 31, 1 °P4. Since the Jntergovernmental Review must be completed prior tc CPA al location of funds, expediency 1n the comrletlon ofthe State rev iew And comments will be greatly appreciated.Si ncerely,

NottSamuel L. tott, Ch1e £

Superfundcc: Hrvan L-lxon, Texas Deoartncnt of Water Resources

6AW-SE :CWCHRAN :m 1 x o n : 10/ 18/84 :D i s k6AW-SEWRIGH

101OCOC0014

000464

UNlTEt . iTfci tNVIKUNM£NI AL

NORTH CAVALCADE STREET SITEHOUSTON, TEXAS

Site Name and LocationNorth Cavalcade Street Site (the Site) covers about 17 acres and islocated northeast of Maury-Cavalcade Street intersection in Houston,Texas. This site is about one mi le west-southwest of the intersectionof Interstate North Loop 610 and U.S. Route 59.

Site's Rank on the National Priority ListThe Site has a Hazardous Rank ing System score of 3 7 . 1 .

Nature of the Problem at the Si teHouston Creosote began a wood-treat ing operat ion on the Site sometimeoetween 1944 and 1953. The operation covered about nine acres andapparent ly inc luded a 150x50x2 foot p i t . These operat ions ceasedbetween 1957 and 1964. Subsequent ly the southwestern corner of theSite was developed with two warehouses. In the early 1980' s theHouston Metropol i tan Trans i t Authority (MTA) Decame interested inthe property and contracted Camp, Dresser and McKee to conduct ageotechn ica l/foundat ion survey of the Si te . Creosote compounds wereencountered early in the survey and as a result the MTA redefinedthe scope of the Camp, Dresser and McKee i nve s t i ga t i on . The resu l t ingreport , "Cava l cade Contaminant Survey," dated July 11 , 1983, providesdocumentation of the pol lut ion. Surface sediments as well as thesha l l ow groundwaters are contaminated with creosote compounds andheavy meta ls . The contaminants include Anthracene, Chrysene,F luoranthene , Arsen i c , Chromium, Lead and Z in c . The bond i s sue thatwould have f inanced the Houston mass trans i t system was defeated andthe property is present ly owned by three par t i e s .

tIon of the Activit ies to be Undertaken during the First PhaseThe f irst phase of act iv i t ies wi l l cons i s t of the remedial investi-gat ion and the feas ib i l i ty study ( R I / F S ) . The remedial inves t igat ion(R I ) wi l l be conducted to determine the nature and extent of thepollution at the Site . The remedial invest igat ion will be followedby the feas ib i l i ty study ( F S ) . The FS wi l l be conducted to deve lopand evaluate remedial alternatives, and to identify the cost-effectiveremedial action to be taken at the Site . A deta i l ed exp lanat ion ofthe R I / FS is provided in the enc losed "F i r s t Phase Act iv i t ies ,Remedia l Invest igat ion , and Feas ib i l i ty Study."

6AW-SE : JCOCHRAN :X7-9705 :6M-GM: j c :X7-9898 : 10/22/84 :R lQ/22/84 Di s k 1 , #49f *\ CONCURRENCES

SYMBOL k

SURNAME k

DATE k

. . . . . . . . S j . . . . . . . lb^4T

EPA Form 1320- 1 ( 1 2 -70 ) OFF IC IAL F ILE COPY. GPC 1984 '4 16- a ^ e

000465

Est imated Cost of the First PhaseThe EPA has set aside $370,000 to conduct the R I/FS .

Date on which the Prop_osed F1 r s t Pha5e Houl_d BeginThe EPA wil l begin the R I/FS in mid-December 1984.

Estimate of when the First Phase is Expected to be CompletedThe EPA anticipates completing the R I/FS by August 1986.

R.eJd.Qn_J>.P.T-Q-Ject Officer to. be Contacted for Additional InformationJohn Cochran (6AW-SE )U .S . Environmental Protect ion Agency1201 Elm streetDa l l a s , Texas 75270Phone : ( 2 1 4 ) 767 -9705

000466

UNITED4MTES ENVIRONMENTAL PROTECTIONoF IRST PHASE ACT IV IT I ES

REMEDIAL INVESTIGATION AND FEASIBIL ITY STUDY

The first phase of activities will consist of the remedial investigationand feas ib i l i ty study ( R I / FS ) . The remedial invest igation (R I ) will beconducted to determine the nature and extent of the pollution at the site.The remedial investigation will be followed by the feasibility study (FS) .The FS will be conducted to develop and evaluate remedial alternat ives,and to identify the cost-effective remedial action to be taken at the site.The RI can be divided into eight tasks. The FS can also be broken intoeight tasks. A summarization of the first eight tasks is provided asfollows.

TASK 1 — D E S C R I P T I O N OF CURRENT SITUATIONThe purpose of this phase is to gather, organ ize , and rev iew thebackground information pert inent to the site and its problems. Thistask can be subdivided into three subtasks.a * _Sj _ te . .Background* Summarize the regional locat ion , pert inent

a re a bound ary features, and general site physiography, hydrology,and geology.b * Nature and Extent of Problem. Sunrnarize the actual and potential

on-site an'df bYf-site health and environmental effects. Thismay inc lude , but is not l imited to, the types, physical states,and amounts of the hazardous substances, the pathways ofexposure, contaminate re leases, and any human exposure .

c. Hjstory of Re_sponse_ Act i on s * Summarize any prev ious responseactions coriducted by either local , State, Federal , or privatepart ies inc luding the site inspect ions , other technical reports,and their results . The scope of the RI wi l l t>e developed toaddress the problems and questions that have resulted from theprevious work at the s i te .

TASK 2 « INVEST IGAT ION SUPPORTThere are five areas of consideration in Task 2.a. Contractor Procurement . Prepare contractor procurement documents

and award sub-agreement(s) to secure the services necessary toconduct the R I/F5 .

b* S1tp V^s i t . Conduct initial site visits required to becometarc i l 1ar~with s ite topography, access routes, and proximity ofreceptors to possible contaminat ion, and col lect data forpreparation of the site safety plan,

Disk 1, #30_______CONCURRENCES

SVMBOL |

SURNAME k

DATE t, .- . . . „ J

lOKK^VT

......

,̂<$WO\EPA Porm 1320.1 ( 13-701 OFFICIAL PIUE COPY

* b . S . SPO 1 9 » 4 . 4 i . . . . . .

000467

c. Define Boundary Condi t ions . Establ i sh site boundary condit ionsto l imit the area of site invest igat ions . The boundary condit ionsmay also be used to identify boundaries for site access controland site security.

d. Site Map, Prepare a site map showing all wetlands, waterfeatures, drainage patterns, tanks, bui ld ings , ut i l i t ies , cavedareas4 easements, rights-of-way, and other features. The sitemap and all topographic surveys will be of sufficient detailand accuracy to locate and report all existing and future workperformed at the site,

e' Site Office. If agreed to by EPA and the State, establ ish atemporary site office to support site work.

TASK 3 — SITE INVESTIGATIONSConduct those site remedial ' invest igat ions necessary to character izetne site and its actual or potential hazard to pub l i c health andenv ironment , Tne s ite inves t igat ions w i l l result in data of adequatetechnical content to assess pre l im inary remedial a l ternat ivesdeveloped in Task 4 and support the deta i led eva luat ion of a l ternat ivesduring the FS<All sample analyses wil l be conducted at laborator ies fol lowing EPAprotoco l s , or equ iva l en t s . Str ic t chain-of-custody procedures w i l lbe fol lowed and all samples wi l l be located on the s ite map e s tab l i s hedunder Task 2,a. Waste Chara c t e r i z a t i o n . Develop and conduct a complete samp l i ng

and analysis program to character ize all mater i a l s of interest atthe s i t e . A sampl ing plan wil l be developed showing thel ocat ions , quant i ty, frequency, number ing , and const i tuents forana lys i s for each sample. Elements of the Safety Plan and theQA/OC plan described in the "Add i t i o na l Requ irements" section(Task 8} wil l also apply to sampl ing .

b. Hyd ro^eologjc I nvest i gat i on * Deve lop and conduct a program todetermine the present and potent ia l extent of groundwatercontaminat ion . Efforts wi l l begin with a survey of prev ioushydrogeologic studies and other ex i s t i ng data. The survey w i l laddress the degree of haza rd , the mobi l i ty of pol lutantscons idered , the so i l s ' attenuat ion capac i ty , d i s charge/rechargeareas , regional f low direct ion and qua l i ty , and effects of anypumpiny a l ternat ives . Subsequent to the survey of ex i s t ingdata, a sampling program wi l l be developed to determine thehorizontal and vert ica l d i s tr ibut ion of contaminants and predictthe long-term d i spos i t ion of contaminants . The sampl ing programwi l l , at a minimum, evaluate factors affect ing backgroundl eve ls of contaminat ion , the number and locat ion of we ' l s ,cha in-of-custody and record of samp le s , and the groundwater

000468

sampliny method. Geophysical techniques wi l l be considered foruse in def in ing subsurface condit ions and design of the sampl ingprogram.c. So i l s and Sediments Invest igat ion , A sampling program will bedeveloped and conducted to determine the horizontal and verticalextent of contaminated so i l s and sediments. Informatfon regardinglocal Dackground l eve l s , degree of hazard, location of samples,techniques ut i l i zed , and methods of analysis will be included.d. Su rface Water Invest igat ion. Develop and conduct a program todetermine the extent of contaminat ion of local surface water.A sampl ing program w i l l be developed and conducted, discussingthe degree of hazard, including information on local backgroundl e v e l s , locat ion and frequency of samples , sampl ing techniques,

an" method of ana lys i s .e. Air I nv e s t i g a t i o n , Deve lop and conduct a program to determine

the extent o f atmospheric contaminat ion .TAS< - 1 -- P R E L I M I N A R Y REMED IAL TECHNOLOGIES

Identify preliminary remedial technologies, providing detail sufficientto ensure that s ite inves t igat ions wi l l deve lop a data base adequatefor t^e eva luat ion of a l ternat ives dur ing tne feas ib i l i t y study.a . Pre- I nv e s t i g a t l o n Ac ' . i o n . P r i o r to s tar t i ng any site

i nve s t i ga t i on s , as ses s the s i te condit ions to determine potentialcategories of source control and/or off-s ite remedial actions.Examples of quest ions to be answered are :1. Source Control Action

i . What containment techniques appear feas ib l e to preventincreased contaminat ion of yroundwater?

11 . "*oes inc inerat ion or rec lamat ion appear to De a v iab l eoption?

i i i . Does on-s i te treatment appear to De a v iab l e op t i o n ,and if so, what category of treat-lent should heinves t i ga te- 6 . 9 . , h i o l o g i c a " , ^ y s ^ c a l , cherkal ,t h e rma l )?

2. O f f - S i t e Act ionDoes the apparent volume of containwater make inve : nation or treatmer

^d ground-impract icab le?

W- ' - ' t technologies an.- ava i l a b l e t ) treat theia it if ied contaminants at tne s i c e?

000469

1 1 1 . What technologies exist to effectively reirove off-site contaminated materials?

iv. Wi l l the off-s i te contamination continue to pose athreat If no action 1s taken?

The State and EPA wi l l review and screen the preliminary technologiesso that the site investigations can be designed to answer thesetypes of questions and support the feasibility study.b . Post-Invest igat ion Evaluat ion. Either during or following thesite Investigations, assess the investigation results and

reconroend preliminary remedial technologies likely to apply tothe site proHem. These technologies will be a refinement ofthe options considered in Task 4a. The work during the remediali nvest igat ion wi l l general ly be linited to the fo l l ow ing :1. Recommending types of remediato the site cond i t ions .

technologies appropr iate

2. Recomnending whether or not to remove some or all of thewaste for off-s i te treatment, storage, or d isposal .

3. Determin ing the compatabi l ity of groups of wastes withother wastes .

TASK 5 -- S ITE INVEST IGAT IONS ANALYSISPrepare a thorough analys is end summary of all s ite invest igat ionsand their resu l ts . The object ive of th i s task wi l l be to ensurethat the invest igat ion data are suff i c i en t in qual ity and quant ityto support the feas ib i l i ty study.e resu lts and data from all s i te inves t igat ions wi l l be organ ized

and presented logical ly so that the re lat ionsh ips between s i teinvest igat ions for each medium are apparant .a . Data Analys i s and Exposure Assessment . Analyze al l s ite

invest igat ion data and deve lop a sunwary of the type and extentof contaminat ion at the s i te . The summary wi l l descr ibe thequant i t i e s and concentrat ion of a spec if ic chemical at the s iteand ambient leve l s surrounding the s i te . Preparat ion of anexposure assessment descr ib ing the numbr - and location andtypes of nearby popu la t i on s , ac t iv i t i e s and pathways that mayresult in an actual or potent ial threat to publ ic health,welfare , or the environment, and a project ion of chemicalconcentrations at the d i fferent points of exposure through eachmedia pathway over the l ike ly period of exposure .

000470

The analys is wi l l discuss the degree to which either sourcecontrol or off-site measures are required to s ignif icant lymitigate the threat to public health, welfare, or the environment

b. Application _to Prel iminary Technologies. Analyze the resultsof the" site Investigations in relation to the preliminaryremedial technologies developed in Task 4. Data supporting, orrejecting, types of remedial technologies, compatabi l ity ofwastes and construction materials, and other conclusions willbe presented.

TASK 6 -- FINAL REPORTPrepare a f inal report cover ing the remedial invest igat ion phase andsubmit copies to the State, as appropriate. The report wi l l includethe resu l ts of Task 1 through 6, and wi l l inc lude add i t iona l infor-mation in an appendix.

TASK 7 — COMMUNITY RELATIONS SUPPORTAs necessary furn i sh the personne l , s e rv i c e s , mate r i a l s , and equipmentrequired to undertake a community relat ions program. Although th i smay be a l imited program, community re lat ions wil l be integratedclosely with al l remedial response act iv i t i e s . The object ives ofthis effort are to achieve community understanding of the act ionstaken and to obtain community input and support pr ior to se lect ionof the a l t e r na t i v e ( s ) .Community re lat ions support inc ludes , but may not be l imited to thefo l lowing:

o Rev i s ions or add i t ions to community re la t ions plansinc lud in a def i n i t i on of community re lat ions programn^^ds for each remedial activity.

o Ana l y s i s of community att i tudes toward proposedactions.

o Preparat ion and d i s s em ina t i on of news re l ea se s , factsheets, slide shows, exhibits , and other audio-visualmater ia l s aesnjned to appr i se the community of currentor proposed act ions .

o Estab l i shment of a community informat ion c°nt.pr.o Arrangement of br ief ings, press conferences,

workshops , and publ ic and other informal mee t i ng s .o Assessment of the successes **«^ fai lures of the

community re lat ions program.

000471

o Preparat ion of reports and partic ipation in publicmeet ings , project review meet ings, and other meetingsas necessary to the normal progress of the work.

o Sol ic i tat ion, select ion, and approval of subcontracts,if needed.

All community relat ions support will be consistent with:o Superfund community relations policy as stated in

the "Guidance for Implementing the Superfund Program."o Community Relat ions in Superfund -- A Handbook.

TASK 8 -- ADOriONAL REQUIREMENTSa. Repor t i n g Requirements

Month ly reports shal l be prepared by the Engineer to descr ibetne techn ica l and f i nanc i a l progress of the project . Thesereports wil l d i scuss the fol lowing items.

act iv ity,and progress to date .

1 . Ident if icat ion of site and2. Status of work at the s ite3. Percentage of complet ion.4. Diff i cu l t i e s encountered dur ing the report ing per iod.5. Actions being taken to rect ify problems.6. Ac t i v i t i e s planned for the next month.7. Changes in personne l .8. Actual expenditures inc lud ing fee and direct labor hoursexpended for this period.9. Cumulat ive expenditures ( i nc lud ing fee) and cumulat ive

direct labor hours.10. Project ion of expenditures for completing the project,

inc lud ing an exp lana t i on of any . . i t j n i f i cant var ia t ionfrom the forecasted target .

11. A graphic representation of proposed versus actualexpenditures (p lus fee) and comparison of actual vs. targetdirec f labor hours. A project ion to complet ion wi l l bemade for both.

The morrr .b iy progress report wi l l l ist target and actual complet iondates for each element of act iv i ty , inc lud ing project complet ion,and provide an exp lanat ion of any dev ia t ion from the mi les tonesin the work plan schedule .Chain-of-Custpdy . Any f i e ld samp l i ng co l lect ion and analysesconducted wi l l Be documented in accordance w i th chain-of-custodyprocedures as provided by EPA.

000472

c. f plan will be developed to protect they of personnel involved in the remedialThe plan will be consistent with:

o Section l l l ( c ) {6 ) of CERCLAo EPA Order 1440.1 — Respiratory Protectiono EPA Order 1440.3 — Health and Safety Requirements for

Employees Engaged in Field Activit ieso EPA Occupational Health and Safety Manualo Other EPA guidance as providedo State safety and health statuteso Site condit ions( jua l i ty Assurance/Qua l i ty Control ( Q A / Q C ) . A Qual i ty AssuranceProject Plan w i l l b e prepared for the sampl ing , analysis , anddata handl ing aspects of the remedial invest igat ion. The planwill be consistent dith the requirements of EPA' s ContractLaboratory program. The plan shall address the fol lowing points1. OA Object ives for Measurement Data , in terms ofprec i s ion , accuracy, completeness , representat iveness ,

and coniparabi l ity.2. Sampl ing Procedures .3. Sample Custody.4. Ca l i b ra t i on Procedure s , Reference s , and Frequency.5. Internal OC r^ecks and Frequency.6. QA Performance Aud i t s , System audits, and

Frequency.7. OA n^oorts to management.8. preventat ive Maintenance Proceoures and Schedule .,. Specif^ Proce^res to £ ̂ ^

^.Smy^ci *, nd crpl= oU^^^^^^^-10. Correct ive Act ion,

000473

The feas ib i l i ty study ( FS ) wil l be conducted after the completionof the RI. The purpose of the FS is to develop and evaluateremedial alternat ives and to identify cost-effective actionthat will mit igate the problem(s) at the s ite* The FS can bed iv ided into eight tasks.

TASK 9 — DESCRIPTION OF CURRENT SITUATION AND PROPOSED RESPONSESummarize the information on the site background, the nature andextent of the problem, and previous response act ivit ies presented inTask 1 of the remedial invest igation.Following this summary of the current situation, a site-specificstatement of purpose for the response, based on the results of theremedial i nve s t i ga t i on , wi l l be presented. The statement of purposewill be organ ized in terms of components amenable to discreteremedial measure ( e . g . , a statement of purpose descr ib ing theeva luat ion of a l t e rna t i ve s for treatment of contaminated ground-water) .

TASK 10 -- DEVELOPMENT OF ALTERNATESBased on the ^esults of the remedial invest igat ion and cons iderat ionof pre l im inary remedial technolog ies (Task 4), the Engineer wi l ldevelop a l imi ted number of a l ternat ives for source control or o f f -s ite remedial ac t ions , or both , on the bas i s of object ives e s tab l i shedfor the response and the scoping dec i s ion .a. Estab l i snment of Remedia l Response Objec t ive s

Es tab l i s h s i t e - spe c i f i c ob ject ives for the response . Theseobject ives sl-'all be based on pub l i c health and environmentalconcerns , the Remedial Act ion Master Plan and scoping d e c i s i o n ,information gatnereri dur ing the remedial inves t igat ion , Sect ion300.68 of the Nat iona l Cont ingency Plan ( N C P ) , EPA inter imguidance, and the requirements of any other app l i cab l e Federalstatutes. Preliminary cleanup objectives will be developed inconsu l tat ion wi th EPA and the State .

b . Ident i f i cat ion of Remedial Al t e rna t i v e sDeve lop a l t e rnat ive s to incorporate remedial technologies ( f romTask 4 b ) , response ob j e c t i ve s , and other appropr iate cons idera t ionsinto d comprehensive, site-specific approach. Alternativesshould inc lude non-c leanup ( e . g . , a l t e rna t i v e water supp ly ,r e l o ca t i on ) and no-act ion opt ions . The a l ternat ives wi l l bedeveloped in close consu ltat ion with EPA and the State.

000474

TASK 11 — INITIAL SCREENING OF ALTERNATIVESThe alternatives developed in Task lOb will be screened by the Engineer,ERA, and the State to eliminate alternatives that are clearly notfeas ib le , or appropriate, prior to undertaking detai led evaluationsof the remain ing alternatives.Three broad considerations wil l be used as a basis for the initialscreening: cost, effects of the alternative, and acceptableengineering practices. More specifically, the following factorswil l be considered:1) Cost. An alternative whose cost far exceeds that of other

alternat ives will usually be e l iminated. Total cost wil linc lude the cost of implementing the alternat ive and the costof operat ion and maintenance .

2} Environmental effects . Alternat ives posing s ign i f i cant adverseenvironmental effects wi l l be excluded.

3) Environmenta l protect ion. On ly those a l ternat ives that sat isythe response object ives and contribute substant ia l ly to theprotection of public health, welfare, or the environment shallbe cons idered further. Source control alternat ives shallach ieve adequate control of source mater ia l s . Off-s i tea l ternat ives shal l m in im i z e or mit igate the threat of harm topubl ic hea l th , we l fare , or the env ironment .

4 } Implementabi l i ty and re l iab i l i ty . Alternat ives that may proveextremely d i ff i cu l t to implement, wi l l not ach ieve the remedialobject ives in atechnology wil l reasonable timebe e l im inated . per iod, or rely on unproven

TASK 12 — LABORATORY STUDIES { i f Requ i red )The Engineer wil l conduct any necessary laboratory and bench sca letreatab i l i ty studies required to eva luate the effect iveness ofremedial technologies and establ ish eng ineer ing cr i ter ia ( e . g . ,leachate treatment; groundwater treatment; compatabi l i ty ofwaste/leachate with site ba r r i e r wa l l s , cover , ana other ma t e r i a l sproposed for use in the remedy). It is expected that the scope ofth i s task wi l l depend on the resu l t s of Tasks 10 and 11 and thereforewi l l not be complete at the start of Task 13.A separate work plan for any proposed laboratory studies wi l l besubmitted for EPA and State approva l . This submittal wi l l be madein the t imeframe required to ma in ta i n steady progress of the overallfeas ib i l i ty study. {Addi t iona l studies may also be conducted dur ingthe des ign phase if needed to ref ine treatabi l i ty results or deve lopdetai led des ign c r i t e r i a . )

000475

^ •̂MB

*

10TASK 13 -- EVALUATION OF THE ALTERNATIVES

Evaluate the alternative remedies that pass through the initialscreening in Task 11 and recommend the most desirable alternative toEPA and the State.Alternat ive evaluation shall be preceded by a detailed developmentof the remaining alternatives.a. Detai led Development of Remaining Alternatives

The detailed development of the remaining feasible remedialalternatives wil l include as a minimum:1 } Descr ipt ion of appropr iate treatment and d i sposa l

technologies .2} Spec ia l eng ineer ing cons iderat ions required to implement

the alternat ive ( e . g . , pi lot treatment fac i l i ty , addit ionalstudies needed to proceed with final remedial d e s i gn ) .

3) Environmental impacts and proposed methods , and costs ,for m i t i ga t i ng any adverse effects.

4) Opera t i on , ma in tenance , and mon i tor ing requirements of theremedy.

5) Off- s i t e d i sposa l neeas and transportat ion p lans .6) Temporary storage requ irements .7) Safety requirements for remedial implementat ion ( i n c l ud i ng

both on-s i te and off-s i te health and safety cons idera t ions ) .8) A descr ipt ion of how the a l t ernat ive could be phased into

the ind iv idua l operab le un its . The descr ipt ion shouldinc lude a d i s cu s s i on of how var ious operab le units of thetotal remedy could be implemented i nd iv idua l l y or in groups ,resu l t i ng in a s ign if i cant , improvement or sav ings in co s t s .

9) A descr ip t ion of how the a l ternat ive cou ld be segmentedinto areas to a l l ow implementat ion of d i f fer ing phases ofthe a l t e rna t ive .

10) A rev iew of any off-s i t e fac i l i t i e s provided by the Stateto ensure compliance with app l i cab l e RCRA requirements ,both current and proposed .

000476

11Environmental AssessmentPerform an Environmental Assessment (EA) for each alternative.The EPA wil l include, at a minimum, an evaluat ion of eacha l ternat ive ' s environmental effects, an analysis of measures tomitigate adverse effects, physical or legal constraints, andcompliance with CERCLA or other regulatory requirements.In addition, each alternative will be assessed in terms of theextent to which it mitigates long-term exposure to any residualcontaminations and protects publ ic health both during and aftercompletion of the remedial action. The assessment shall describethe levels and characterist ics of contaminants, potentialexposure routes, and potent ia l ly affected populat ion . Theeffect of "no action" should be descr ibed in terms of the shorteffects ( e . g . , lagoon fa i l u re ) , the long term exposure tohazardous substances, and resu l t ing publ ic health impacts. There lat ive reduction in publ ic health impacts for each alternat ivewi l l be compared to the no action leve l . For off-site measures ,the re l a t i ve reduction in impact wi l l be determined by comparingres idual leve ls of each alternat ive with ex i s t i ng cr i t er ia ,standards , or gu ide l ines acceptab le to EPA. For source controlmeasures , or when cr i t e r i a , standards , or gu ide l ines are notava i l ab l e , the compar ison w i l l be made based on ohe re lat iveeffect iveness .The re lat ive reduct ion in pub l i c health impacts for eacha l ternat ive wi l l De compared by l i s t ing alternat ives in increas i ngleve ls of protect ion. The no act ion a l ternat ive wil l serve asthe base l ine for the analys is .Cost Ana lys i sEvaluate the cost of each feas ib le remedia l act ion a l ternat ive(and for each phase or segment of the a l t e rna t ive ) . The costwill be presented as a present worth cost and will include thetotal cost of implement ing the a l ternat ive and the annualoperat ing and maintenance cost . Both monetary costs andassoc iated non-monetary costs wi l l be inc luded. A d i s t r ibut ionof costs over time wil l be prov ided .Eva lua t i on and Recommendat ion of Cos t -Ef f e c t i v e Al te rna t iveAlternat ives shal l be evaluated us ing techn i ca l , env i ronmenta l ,and economic cr i t e r i a . At a min imum, the fo l lowing areas wi l lbe used to evaluate a l t e rna t i v e s :1 . Re l iab i l i ty ,poten t i aTror

beAlternat ive s that m in im i ze or e l iminate therelease of wastes into the environment wil l

considered more re l iab le than other a l ternat ives .

000477

122. |mp1 ementabi_l ity. The requirements of implementing the

alternative^ win be considered, including phasingalternat ives into operable units and segmenting alternativesinto project areas on the s ite .

3. Operation and Maintenance Requirements. Preference willbe given to projects with lower O^M requirements, otherfactors being equal.4. Environmental Effects . Alternatives posing the leastimpact (or greatest Improvement) on the environment will

be favored,5. Safety Requirements. On-s i t e and off-s i te safety

requirements dur ing implementation of the alternat ivesshould be cons idered. Alternat ives with lower safetyimpact and cost wil l be favored.

6. Cos t . The remedial a l t e rnat ive with the lowest totalpresent worth cost will be favored. Total present wo^thcost wil l include capital cost of implementing theal ternat ive and cost of operation and maintenance of theproposed a l ternat ive .

Recommend the alternative determined to be the most effective.The recommendation wi l l be jus t i f i ed by stat ing the re lat iveAdvantages over other a l ternat ives cons idered. Eva luat ivecons iderat ions shal l be appl ied uniformly to each aHernat ive .The lowest cost a l ternat ive that is technological ly feasibleand reliable and that adequately protects (or mitigates damageto) publ i c hea l th , we l fare , or the environnent wi l l be cons ideredthe cost-effect ive alternat ive .

e , Pre l im inary ReportPrepare a pre l iminary report present ingthrough 13 and the recommended remedialcopies of the pre l iminary report to ERA

TASK 14 -- CONCEPTUAL DESIGN

the resu l ts of Tasksa l ternat ive . Submitand the State .

Prepare a conceptual de s i gn of the remedial a l ternat ive selected byEPA and the State. The conceptual des ign shall inc lude, but is notl imited to, the eng ineer ing approach inc lud ing implementat ionschedule, special implementation requirements, institutionalrequ irements , phas ing and segmenting cons idera t ion s , prel iminarydesign cr i ter ia , prel iminary site and facil ity layouts, budget costestimate ( inc lud ing operation and maintenance costs) .operating andmaintenance requirements and durat ion , and an out l ine of the safetyplan inc lud ing cost impact on implementat ion. Any addit ional

000478

13

,be raised to reflect the results of the conceptual design.

TASK 15 - FINAL REPORTfinal for submission to EPA and the State. The

sent to EPA and the State.TASK 16 « ADDITIONAL REQUIREMENTS

Report ing requirements are described in Task 8 of the remedialinvest igat ion scope of work.

000479