PRELIMINARY CLOS E OUT REPORT

PO P

ROGERS ROAD MUNICIPAL LANDFILL 8UPERPUN D SIT E PULASKI COUNTY, ARKANSAS

UNITED STATE S ENVIRONMENTAL PROTECTIO N AGENCY SEPTEMBE R 199 5ROGERS ROAD MUNICIPAL LANDFILL BUPBRPUND SIT E PRELIMINARY CLOS E OU T REPORT Pulask i County, Arkansa s

I« INTRODUCTIO

N Thi s Preliminar

yClos e Ou t Repor t document s tha t th e United State s Environmenta l Protectio n Agenc y(EPA ) ha s completed constructio

n activitie s fo r th

e Roger s Roa

d Municipa l Landfil l Superfun d Sit e (Site) i n accordanc e wit h OSWE R Directiv e 9320.2-3C . EPA, th

e Arkansa s Departmen t o f Pollutio n Contro l an

d Ecolog y(ADPC&E) , an

d the Cit

yo f Jacksonville , conducte d a Sit e inspectio n on Septembe r 20 , 1995 , an d determine d tha t th

e EP A contractor s an

d th e cit yo f Jacksonvill e had substantially complete d th e constructio n activitie s i n accordanc e wit h th e Remedia l Action (RA ) wor k plan s an

d specifications . Durin g thi s inspection , EP

Adetermined tha t al l remedia l activitie s wer e complet e an

d tha t th e onl yremainin g activitie s a t th

e Sit e prio r t o fina l sit e clos e ou t woul d b e Operatio n an d Maintenanc e (O&M ) an d groun d wate r monitoring . II . SUMMARY 0 7 SIT E CONDITION S Background The Sit e encompasse s abou t 1 0 acre s i n Pulask i County , outside the cit

ylimit s o f Jacksonville , Arkansa s approximatel y 1 2 mile s northeas t o f Littl e Rock, Arkansas . (See Figure s * 1 an d 2 . ) A n estimated 10,000 peopl e liv e withi n thre e mile s o f th e Sit e an d dra w drinkin

g wate r fro

mpubli c an

d privat e wells . Les s tha n one-hal f mil e wes t o f th e Roger s Road Municipa l Landfil l Superfun

d Sit e i s the Jacksonvill e Municipa l Landfil l Superfun d Site . Becaus e o f th e proximityo f th

e site s an

d th e similaritie s i n thei r feature s an d characteristics , the site

relate d activitie s for thes e site s wer e carrie d ou t concurrently . The Cit yo f Jacksonvill e operate d the landfil l fro mth e tin e i t purchased the lan

d i n 195 3 unti l 1974 . Ope n burnin g an d trenchin g wer e the primar

ymethod s o f wast e disposa l used a t th e Site. Th

e landfil l wa s closed i n Jul y197 3 whe n ADPC& E refuse d t o gran t a landfil l permi t becaus e o f th e hig h wate r tabl e an

d poo r drainag e i n th

e area. Specifi c wast e type s an d quantitie s wer e no t recorded b ythe Sit e owner/operators ; however , i n additio n t o municipa l waste , severa l drum s o f industria l wast e fro ma loca l herbicid e manufacturer , Verta c Chemica l Corporation (Vertac) , wer e disposedSCALE (FEETt^"" ^ SWAMP/MARSH GRASS I N SOLD SITE DETAILS ROGER S ROA D LANDFILL , JACKSONVILLE. AR m FI G ^ \ \\3k* —on i n th e landfill . On~sit e soi l an d abou t 3 0 decayin

g drums wer e foun

d t o b e contaminated wit h dioxi n (2,3,7,8-tetrachlorodibenz o (P ) dioxi n expresse d a s 2,3,7,8-TCD D equivalents) , th e herbicide s 2,4- D an

d 2,4,5-T , an

d th e pesticide dieldrin . I n earl y1986 , th

e Cit yo f Jacksonvill e fence d th e Sit e t o preven t publi c access . Althoug h the Cit

yo f Jacksonvill e maintain s the fenc e aroun d the Sit e perimeter , the Sit e i s stil l used recreationall yfor huntin g b yloca l residents . The Sit e wa s adde d t o th e Nationa l Prioritie s Lis t on Jul y22 , 1987 , wit h a scor e o f 29.64 . Remedial Planning Activities EP Areviewed th

e result s o f th

e Jul y199 0 Remedia l Investigation/Feasibilit yStud y(RI/FS) conducte

d b yth e EP A contractor . Pee r Consultants , an d al l publi c comment s received . On Septembe r 27 , 1990 , a Record o f Decisio n (ROD ) for th

e Sit e wa s issued . The RO D selected excavation , soi l cover , an d of f sit e treatmen t an

d disposa l a s the remed yfor th e Site . Th

e remed y included :

• Excavation o f contaminated soi l an d debri s containin

g greate r tha

n 1 0 par t pe r billion (ppb ) equivalen t 2,3,7,8-TCD D an

d backfillin

g th e excavated area ;

• Transportatio

n o f th e excavated materia l t o th e Verta c Chemica l Corporation Superfun d Sit e i n Jacksonville , Arkansas ;

• Incineratio

n o f the excavated contaminated materia l an d disposa l o f residual s a t Vertac ;

• Steam-cleanin

g an d disposa l o f larg e item s o f refus e remove d fro

mcontaminate d area s a t the Roger s Roa d Site;

• Coverin

g soil, debri s an

d wate r meetin

g the criteri a state d belo w wit h twelv

e inche s o f soil: 1 ) 2,3,7,8-TCD D concentration s >1. 0 an d ^1 0 ppb, 2 ) Cumulative Hazard Inde x >. 7 fo r 2,4,5-T ; 2,4, 5 TP; an

d dieldrin ; o r 3 ) Dieldri n >3 7 pp b

• Institutiona l control s suc h a s fenc e maintenanc e an d land-us e restrictions ; an d

• Groun

d wate r monitoring .

4O

n Jun e 20 , 1994 , a Consen t Decre e (CD ) betwee n EP Aan d th e Cit yo f Jacksonvill e regardin g th e Sit e wa s entere

d i n Federa l Distric t Court . Unde r th e agreement , EP

Aperformed th

e wor k tha t involved handlin

g th e hazardou s substances , includin g picking-u

p the ho t spots , transportin g the materia l t o Vertac , incineration , an d decontamination . The Cit yperformed th

e non-hazardou s work , includin g fencing , backfilling , grading , re-vegetating , inspectio n an d maintenance , installation o f additiona l groun d wate r walls, groun

d wate r samplin

g an d analysis , an

d institutio

n o f an yland-us e controls . Thi s CD an d the C D fo r th e nearb y Jacksonvill e Sit e wer e the firs t i n th e countr ybetwee n a municipalit yan

d EP Atha t utilize d thi s typ e o f mixe d wor k an d mixe d fundin

g settlement . Ramodial'Construction Activities On Augus t 22 , 1995 , Ecolog yan d Environmen t (E&E) , th e EP A Technica l Assistanc e Tea m (TAT ) an

d th e Emergenc

yRespons e Clean

u p Servic e (ERCS ) contractor , Riedel-Peterson , mobilize d t o begi n remedia l operation s a t the Site . Afte r preliminar yroa d wor k wa s completed , excavatio n o f contaminated soi l wa s initiated . Durin g th e action , Riedel-Peterso n recontainerize

d contaminated materia l tha t wa s i n decayin g drums an

d excavated soil. Thi s material , alon g wit h investigation-derive d wast e suc

h a s contaminated persona l protectiv e equipment , wa s transporte d t o the Verta c incinerato r fo r treatment . Confirmation soi l sample s wer e collected afte r thi s initia l excavatio n t o verif yth

e degre e o f contaminan t remova l an d t o determin e the area s o f moderat e contaminatio n (2,3,7,8-TCD D concentration s >1. 0 an d ^1 0 pp b an

d dieldri n >3 7 ppb) whic h woul d late r b e covered wit h clean soil. Atota l o f 9 3 soi l sample s wa s taken durin g th e R At o confir mattainmen t o f clean-u p standards . Sample s wer e collecte d fro mpoint s on a 1 4 x 1 4 foo t gri d patter n extendin

g outsid e o f the boundar

yo f contamination a s established durin g th e Remedia l Investigation . Eighty-si x o f thes e sample s wer e analyzed fo r dioxi n an

d related compound s an d 1 3 wer e analyze d for dieldrin , i n accordanc e wit h the QualityAssuranc e Samplin g Pla n (QASP ) prepare d fo r th

e Remedia l Actio n b

ythe TAT. Atota l o f 20 0 cubi c yard s o f contaminate d soi l an d 76 drums o f hazardou s material s (includin g 19 drum s o f investigation

derive d wastes ) wer e transported t o Verta c an d incinerated . Thi s i s a highe r volume tha

n the 13 0 cubi c yard s estimated i n th e ROD. Despit e thi s increas e i n volume, remedia l activitie s wen t smoothly . Incineration a t Verta c bega n o n Octobe r 20 , 1994 , an d ende d o n Decembe r 4 , 1994 . The Januar y20 , 1995 , Technica l Assistanc e Repor t fo r the Roger s Roa d Municipa l Landfil l writte n b yE&E, detail s the R

Aactivitie s performe d b yEP Aan d it s contractors . 5The tota l cos t for th e R Awa s $129,070.0 0 for th e excavation , preliminar

ysampling , an

d transportatio

n o f th e wast e an

d $1.07 millio n for th

e confirmator

ysamplin

g an d incineratio

n a t Vertac . Durin g th e fal l o f 1994 , th

e Cit yo f Jacksonvill e continue d it s regradin

g activitie s an

d installed the thre e additiona l groun d wate r monitorin

g well s betwee n th

e Jacksonvill e Landfil l an d the Roger s Roa d Landfil l a s required b yth e RO D an d CD. The Cit ydemobilize d i n lat e Octobe r whe n heav yrain s i n th

e are a mad e passag e throug

h th e Sit e difficult . Cit

yactivitie s recommence d i n Jul y199 5 whe n th e Sit e wa s sufficientl

ydr yfor vehicle s t o pass. Th

e Cit yregradin

g activitie s wer e completed i n Septembe r 1995 . Alis t o f al l sit e activitie s undertake n b y the Cit yi s included i n th

e weekl yactivit

yreport s i n th

e Sit e file.

III. DEMONSTRATION O F QUALITY ASSURANCE/QUALITY CONTROL (QA/QC) FROM

CLEANUP ACTIVITIE S Becaus e o f th

e simplicit

yo f th e action a t th

e Site, one wor k plan wa s submitted which encompassed th e Remedia l Desig

n (RD ) an d R AActivitie s consistent wit h th e RO D an d CD requirements . Th

e QAS P fo r th

e R Adetailed stric t samplin g an d analytica l program . Al l procedure s an d protoco l fo r confirmator y sampl e analysi s ar e included i n thi s document . Th e selectio

n o f th e location s fo r confirmator ysamplin

g an d a graphica l presentatio

n o f th e concentration s o f contaminant s a t thes e locations ar e documente d i n th e Januar y20 , 1995 , Technica l Assistanc e Repor t fo r the Roger s Road Municipa l Landfill . EP Aprovide d direc t oversight o f th e excavation an

d confirmator

ysoi l samplin

g activities . Th

e Jacksonvill e Communit yRelation s Offic e maintaine d administrativ e suppor t fo r th e projec t five day s a week . Th e QA/Q C progra

mutilized throughou t th e remedia l actio

n wa s sufficientlyrigorou s an d wa s complie d wit h adequately . Thi s enable d EP

At o mak e the determination tha t al l analytica l result s reporte d ar e accurat e t o th

e degre e neede d t o assur e satisfactor y execution o f th

e remedia l action , consistent wit h th e RO D an d th e RD/R Awor k plan.

6IV . ACTIVITIE S AND SCHEDULE FOR SIT E COMPLETION

Th e followin

g ar e task s whic h wil l b e performe d i n orde r t o complet e th

e remedia l proces s a t the Site : TAS K

Groun d Wate r Monitorin

g Receiv e 10/15/9 5 Groun d Wate r Dat a Complet e Analysi s o f Dat a Fina l Operabl e Uni t Inspectio n Operabl e Uni t Completion/Remedia l Actio n Repor t Closeou t Repor t Revegetation (must occu

r i n rain

yseason ) Groun d wate r monitorin

g Groun d wate r monitorin

g Groun d wate r monitorin

g Five-Yea r Review O&M activitie s ESTIMATE D COMPLETIO

N 10/15/9 5 01/15/96 02/29/9 6 03/15/96 03/31/96 03/31/96 04/30/96 10/15/96 10/15/9 7 10/15/9 8 08/04/99 TB A RESPONSIBL E ORGANIZATIO

N ADPC&E/Cit

y ADPC& E EP A EPA/ADPC& E EP A
EP A Cit y ADPC&E/City ADPC&E/City ADPC&E/City EP A Cit y Th e City, wit h th

e assistanc e o f ADPC&E, wil l conduc t a t leas t fou

r mor e annua l groun

d wate r monitorin

g samplin

g event s prio r t o the Sit e five-yea r review . EP Aan d ADPC& E wil l evaluat e thi s dat a an

d determin e whethe r o r no t additiona l monitorin g i s necessary . Sampl e result s fro mbot h th

e R I an d th e Novembe r 199 4 an d May1995 samplin

g event s sho

w tha t the groun

d wate r i n the are a surroundin

g th e Sit e i s no t contaminated . I f enoug h dat a i s collecte d prio r t o th

e fift h yea r o f groun

d wate r monitorin

g t o sho w a statisticallysignifican t tren d o f non-contamination , EP A ma ynotif ythe Citytha t additiona l samplin g i s no t necessary . Sit e O& M activitie s wil l includ e routine inspection s o f Sit e condition s like drainage , maintenanc e o f perimete r fencing , an d annua l groun

d wate r monitoring . The Sit e ha s bee n cleane d t oresidentia l clean-u p standards ; however , groun d wate r monitorin

g wil l b e conducte

d t o ensure tha t th

e groun d wate r i s no t contaminated . Unde r th e CD, th e Cit yo f Jacksonvill e ha s assume d al l responsibilit

yfo r O& M a t th e Site . Th

e Cit ywil l als o remai n i n contro l o f Sit e access . Th e remedia l constructio n an d remedia l action activitie s achieve d th

e cleanu p criteri a an

d performanc e standard s required b yth e RO D fo r thi s activity . ^1TTMr Y o f Five-Yea r revie

w Status Becaus e th

e Sit e wa s cleaned t o residentia l level s throug h excavation an

d cappin g o f lo w concentratio

n material s with clea

n soil, th

e residua l risk a t th

e Sit e i s no t abov

e health-base

d levels . However , unti l additiona l groun d wate r dat a i s acquired , ther e i s a possibilit ytha t hazardou s materials , abov e health-based levels , coul d b e foun d i n th e groun d water . I f so, th e us e o f th

e groun d wate r mus t b e restricted . Afive-year revie

w wil l b e conducte

d fiv e year s fro

mth e dat e on whic h th

e firs t contrac t for remed yimplementatio

n wa s awarded . E& E wa s taske d throug h a n Augus t 4 , 1994 , Technica l Directiv e Memorandu

mt o perfor

mth e RD/RA. Therefore , EP

Awil l complet e th

e firs t five-year revie w on o r befor e Augus t 4 , 1999 . Furthe r five-year reviews wil l b e conducte d pursuant t o OSWE R Directiv e 9355.7-02 , "Structur e an d Component s o f Five-Yea r Reviews " or othe r guidanc e availabl e a t th e time.

^9^

^ Q, /^v^^^ Myro n 0

. Knudson , P.E. Director , Superfun d Divisio n

8 Dat e