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# O Conno r

NP LSite Administrativ eRecor d Addendu mI Inde x Compiled : Apri l 7 , 1994 BS D Signed : Jul y 11 , 1994

Regio nI WasteManagemen t

Divisio n U.S

. Environmental Protectio nAgenc yINTRODUCTION

Thi s documen t i s th e Inde xt o th e Administrativ e Recor d AddendumI fo r th e Explanatio n o f Significan t Difference s fo r th e O'Conno r Nationa l Prioritie s Lis t (NPL ) site . Sectio n I o f th e Inde xcite s site-specifi c documents , an d Sectio n I I cite s guidanc e document s use d b yEP Astaf f i n selectin g a respons e actio n fo r thi s site . Thi s Administrativ e Recor d i s availabl e fo r publi c revie w a t EP ARegio n I , 9 0 Cana l Street , Boston , Massachusetts , an d a t th e Lithgo wPubli c Library , Winthro p Street , Augusta , Maine . Question s concernin g th e Administrativ e Recor d shoul d b e addresse d t o th e EP ARegio n I sit e manager . Additiona l volume s mayb e adde d t o thi s Administrativ e Record . Th e Administrativ e Recor d i s require d b yth e Comprehensiv e Environmenta l Respons e Compensation , an d Liabilit yAc t (CERCLA) , a s amende d b

yth e Superfund Amendment s and Reauthorizatio n Ac t (SARA) .Sectio n I Site-Specifi c Document sADMINISTRATIV E RECORD ADDENDU

M INDE X fo r th e O'Conno r Superfun d NP L Sit e Explanatio n o f Significan t Difference s 4. 0 Feasibilit yStud y 4. 1 Interi mDeliverable s 1 . Memorandumfro mAn n Mari e Burke , EP ARegio n I Toxicologist , t o Ros s Gilleland , EP ARemedia l Projec t Manager , date d Apri l 5 , 199 4 concernin g ris k calculations . 5. 0 Recor d o f Decisio n 5. 1 Correspondenc e 1 . Lette r fromCharle s R . Nickerson , P.E. , Centra l Main e Power , t o Ros s L . Gilleland , EP ARegio n I , date d Novembe r 9 , 199 2 concerning Ne wSit e Informatio n wit hattache d Figur e I , and Appendice s A , B , an d C . 2 . Lette r fromAla n M . Prysunka , Director , Burea u o f Hazardou s Materia l and Soli d Wast e Control , Main e Departmen t o f Envrionmenta l Protectio n date d Jun e 20 , 199 4 concerning Explanatio n o f Significan t Differences . 5. 2 Applicabl e o r Relevan t and Appropriat e Requirement s 1 . Lette r fromRos s L . Gilleland , EPARegio n I , t o Alle n Bingham , Main e Departmen t o f Environmenta l Protection , date d Januar y18 , 199 3 concerning Applicabl e o r Relevan t and Appropriat e Requirements . 2 . Lette r fromAlle n J . Bingham , Main e Departmen t o f Environmenta l Protection , t o Ros s Gilleland , EP A Regio n I , date d February10 , 199 3 concernin g Applicabl e o r Relevan t an d Appropriat e Requirements . 3 . Lette r fro mJoann e O . Morin , GE I Consultants , Inc. , t o Charli e Nickerson , Centra l Main e Powe r Compan ydate d Apri l 7 , 199 4 concernin g th e PC B disposa l Requirement s promulgate d unde r th e Toxi c Substance s Contro l Ac t (TSCA) .

### 5. 4 Recor d Decisio n 1 . Draf t "Explanatio n o f Significan t Differences, " EP ARegio n I (Apri l 1994) . 2 . "Explanatio n o f Significan t Differences, " EP A Regio n I (Jul y11 , 1994 ) . 6. 0 Remedia l Desig n 6. 4 Remedia l Pre-Desig n Document s Oversized Attachments associated withentry number1 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 1 . "Sourc e Contro l Samplin g Report, " prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r (Octobe r 22 , 

### 1991 ) 

### . Oversized Attachments associated withentry number2 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 2 . "Sourc e Contro l Summar yRepor t Bench-scal e Treatabilit yStud

yVolum e I " (Report , Tables , an d Figures) , prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y14 , 1992 ) . 3 . "Sourc e Contro l Summar yRepor t Bench-scal e Treatabilit yStud

yVolum e II " (Appendice s A , B , & C) , prepare d b

yGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y14 , 1992) . 4 . "Sourc e Contro l Summar yRepor t Bench-scal e Treatabilit yStud

yVolum e III " (Appendice s D , & E only) , prepare d b

yGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y14 , 1992 ) .

5 . "Sourc e Contro l Summar yRepor t Bench-scal e Treatabilit yStudy : Supplementa l Informatio n Volum e I o f II, " prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y14 , 1992) .6 . "Sourc e Contro l Summar yRepor t Bench-scal e Treacabillt yStudy : Supplementa l Informatio n Volum e I I o f II, " prepare d byGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y14 , 1992 ) . 7 . "Comprehensiv e Draf t Sourc e Contro l Summar yRepor t Pilot-scal e Treatabilit yStudy, " prepare d byGE I Consultants , Inc . fo r Centra l Main e Powe r (Januar y 21 , 1993) . 8 . Comment s date d Ma y18 , 199 3 fro mAlle n J . Bingham , Stat e o f Main e Departmen t o f Environmenta l Protection , o n th e Januar y21 , 199 3 "Comprehensiv e Draf t Sourc e Contro l Summar yRepor t Pilot-scal e Treatabilit yStudy, " prepare d byGE I Consultants , Inc . fo r Centra l Main e Powe r Company . 9 . Comment s date d Jun e 3 , 199 3 fromMar k C . Meckes , EP AOffic e o f Researc han d Development , o n th e January21 , 199 3 "Comprehensiv e Draf t Sourc e Contro l SummaryRepor t Pilot-scal e Treatabilit y Study, " prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r Company . 10 . Comment s date d Augus t 27 , 199 3 fro mMaryJan e O'Donnell , EP ARegio n I , o n th e Januar y21 , 199 3 "Comprehensiv e Draf t Sourc e Contro l Summar yReport ' Pilot-scal e Treatabilit yStudy, " prepare d byGE I Consultants , Inc . fo r Centra l Main e Powe r Company . 11 . "Respons e t o th e U.S . Environmenta l Protectio n Agency' s (EPA ) Comment s o n th e Comprehensiv e Draf t Sourc e Contro l Summar yRepor t Pilot-scal e

. Treatabilit yStudy, " prepare d byGE I Consultants , Inc . fo r Centra l Main e Powe r (Octobe r 29 , 1993 ) . Oversized Attachments associated withentry numbe r 1 2 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 12 . "Revisio n 1 , Comprehensiv e Draf t Sourc e Contro l SummaryRepor t Pilot-scal e Treatabilit yStudy, " prepare d b

yGE I Consultants , Inc . fo r Centra l Main e Powe r (Novembe r 1 , 1993 ) .

### 6. 6 Wor k Plan s and Progres s Report s 1 . "Sourc e Contro l Sampling an d Analysi s Plan , Volume I - Qualit yAssuranc e Projec t Plan, " prepare d b

yGE I Consultants , Inc . fo r Centra l • Main e Powe r (Marc h28 , 1991) . Oversized Attachments associated withentry number2 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 2 . "Sourc e Contro l Samplin g and Analysi s Plan , Volume I I - Fiel d Sampling Plan, " prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r (March 28 , 1991) . 3 . "Sourc e Contro l Pre-design Wor k Plan, " (fo r bench

scal e treatabilit ystudies ) prepare d b yGE I Consultants , Inc . fo r Centra l Main e Powe r (Augus t 7 , 1991) . 4 . "Tri p Repor t fo r Oversigh t Activities " (Pre-desig n sampling an

d analysis ) prepare d b yCD M Federa l Programs Corporation , fo r th e U.S . EPA(Novembe r 4 , 1991) . 5 . "Trip Repor t fo r Oversigh t Activities " (VL F survey ) prepare d b yCD M Federa l Program s Corporation , fo r the U.S . EP A(Marc

h22 , 1992 ) . Oversized Attachments associated withentry number6 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 6 . "Sourc e Contro l Pilot-scal e Treatabilit yStud y Work Plan, " GE I Consultants , Inc . fo r Centra l Main e Powe r (Jun

e 19 , 1992 ) . Oversized Attachments associated withentry number7 may be reviewed, by

appointed only, at EPA RegionI Waste Management DivisionRecords CenterinBoston, Massachusetts. 7 . "Sourc e Contro l Pilot-scal e Projec t Operation s Plan , Volume I - Sit e Managemen t Plan and Communit ySuppor t Plan, " GE I Consultants , Inc . fo r Centra l Main e Powe r (Jun e 19 , 1992) .

### Oversized Attachments associated with entry number8 may be reviewed, by

appointed only, at EPA Region I Waste Management Division Records CenterinBoston, Massachusetts. 8 . "Sourc e Contro l Pilot-scal e Projec t Operation s Plan , Volum e I I - Samplin g & Analysi s Pla n - Fiel d Samplin g Plan, " GE I Consultants , Inc . fo r Centra l Main e Powe r (June 19 , 1992) . 9 . "Sourc e Contro l Pilot-scal e Projec t Operation s Plan , Volum e II I - Samplin g & Analysi s Pla n - Qualit yAssuranc e Projec t Plan, " GE I Consultants , Inc . fo r Centra l Main e Powe r (June 19 , 1992 ) . 10 . "Tri p Repor t I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud yActivities, " prepare d b

yCDM Federa l Program s Corporatio n fo r th e U.S . EPA(Septembe r 2 , 1992 ) . 11 . "Tri p Repor t I I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d b yCDM Federa l Program s Corporatio n fo r th e U.S . EP A(Septembe r 15 , 1992 ) . 12 . "Tri p Repor t II I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d b yCD M Federa l Programs Corporatio n fo r th e U.S . EP A(Septembe r 30 , 1992) . 13 . "Tri p Repor t I V fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d b yCD M Federa l Program s Corporatio n fo r th e U.S . EP A(Septembe r 30 , 1992 ) . 14 . "Tri p Repor t V fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud yActivities, " prepare d b

yCDM Federa l Program s Corporatio n fo r th e U.S . EP A(Septembe r 30 , 1992) . 15 . "Tri p Repor t V I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d b yCD M Federa l Program s Corporatio n fo r th e U.S . EPA(Octobe r 27 , 1992) . 16 . "Tri p Repor t VI I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d byCD MFedera l Program s Corporatio n fo r th e U.S . EP A(Octobe r 27 , 1992) . 17 . "Tri p Repor t VII I fo r Oversigh t o f th e Sourc e Contro l Pilot-scal e Treatabilit yStud y Activities, " prepare d byCD MFedera l Program sCorporatio n fo r th e U.S . EP A(Octobe r 27 , 1992) . 18 . "Sourc e Contro l Scop e o f Wor k fo r Supplementa l Treatabilit yTesting, " Marc h11 , 1993 . 13. 0 Communit yRelation s 13. 5 Fac t Sheets/Informatio n Update s 1 . " ACitizen' s Guid e t o Innovativ e Treatmen t Technologies, " EP AOffic e o f Soli d Wast e an d Emergenc yRespons e (Marc h1992 ) . 2 . " ACitizen' s Guid e t o Solven t Extraction, " EP A Offic e o f Soli d Wast e and Emergenc yRespons e (Marc h1992 ) . 3 . . " ACitizen' s Guid e t o Ho wInnovativ e Treatmen t Technologie s Ar e Bein g Successfull yApplie d a t Superfun d Sites, " EP AOffic e o f Soli d Wast e an d Emergenc yRespons e (Marc h1992 ) . 4 . "PRP s t o Tes t Cleanu p Technologie s fo r O'Conno r Site, " EP ARegio n I (June-1992 ) .

- ~ "Mino r change s mad e t o O'Conno r cleanup plan, " EP A Regio n I (Apri l 1994 ) .Sectio n I I Guidanc e Document sGUIDANC E DOCUMENT S

EP Aguidanc e document s ma yb e reviewe d a t EP ARegio n I , Boston , Massachusetts . Genera l EP A

Guidanc e Document s 1 . U.S . Environmenta l Protectio n Agency . Offic e o f Soli d Wast e and Emergenc yRespons e "Interi mGuidanc e o n Non-Liqui d PC B Disposa l Method s t o B e Use d a s Alternative s t o a 4 0 CF R 761.7 5 Chemica l Wast e Landfill, " (OSWE R Directiv e No . 9355.4-01) , Jul y3 , 1990 . 2 . U.S . Environmenta l Protectio n Agency . Offic e o f Emergenc y and Remedia l Response . Guidanc e o n Remedia l Action s fo r Superfund Site s wit hPC B Contaminatio n (OSWER Directiv e No . 9355.4-01) , Augus t 1990 . 3 . U.S . Environmenta l Protectio n Agency . Offic e o f Researc hand ^ ~ , n //*- | Development . Ris k Assessmen t Guidanc e fo r Superfund ; Volum e L ' ' t_ J I - Huma n Healt hEvaluatio n Manua l (EPA/540/R-92/003) , Decembe r 1991 . 4 . U.S . Environmenta l Protectio n Agency . Offic e o f Researc hand Development . Derma l Exposur e Assessment : Principle s and Applications , Interi mRepor t (EPA/600/8-91/011B) , Januar y 1992 .