E P A/ROD/R10-88/017
1988
EPA Superfund
Record of Decision:
MAMTIN-M ARIETTA ALUMINUM CO.
EPA ID: OMD052221025
OU 01
THE DALLES, OR
09/29/1988
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. AND ROAD BEDS,
PTEl • > ' , 1. - - .V " t ' I' . > . ' « , ? ; ,; r
SCRUBBER £>_!.. , JRE MO LONGER IN USE BUT I NT!r ¦« " THE WATER TABLE AND ABE " ' >T IN
PRO PORT I» " fi^ l_li»j»'XV£ GROUNDWATER ELEVATION.
SURFACE-WATER RUNOFF FROM THE SOUTHWEST PART OF THE SITE FLOWS TO THE SOUTH AND EAST THROUGH ft
NATURAL DRAINAGE CHANNEL PRIOR TO DISCHARGING *0 THE COLOMBIA RIVER, SURFACE-WATER DRAINAGE
ni AO.& o x j
Wf GIX&IU
UNDERLYING THE SOILS/FILL AT 1
r»r%r>tf FA Ipp'T? cjIXE QfH
.,-'1 ' ,i I ¦ " THE CRBG i
SCK OF THE COLD u . BASALT GROUP (CRBG). THE
LYING EXCEPT In laii wOKiH WHERE THE CHENOWETH FAULT
if PLEISTOCENE AGE ALLUVIAL DEPOSITS IN THE NORTHERN
MUNSON PAVING
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CN THE VEGETATED AREAS NORTHEAST OF SF
AMD IN THE AREA HEAR THE
IN ll.r ( ."i,
ttffi
#ES
II„ ENFORCEMENT SUMMARY
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#CR
111. COMMUNITY RELATIONS
I THE CONCERN OVER CYANIDE CONTAMINATION;
I THE IMPORTANCE OF THE ALUMINUM REDUCTION FACILITY TO THE LOCAL ECONOMY; AND
! 'Mil " v\ >' \ | ^ l i i lv I t. t ? V v, 1 If, I I (1 I i_ I t
THE REMEDIAL INVESTIGATION ADDRESSED THE CONCERNS ABOUT CYANIDE# CONCLUDING THAT THERE IS MO
SIGNIFICANT CYANIDE CONTAMINATION IN GROUNDWATER BENEATH THE SITE, THE REDUCTION FACILITY WAS
LEASED AND REOPENED BY NW ALUMINUM, WHICH HAS IMPROVED THEIR PRACTICES FOR HANDLING THE WASTES
WHICH EARLIER CAUSED THE CONTAMINATION MOW BENEATH THE SITE. FINALLY, AS A RESULT OF A LAWSUIT#
i Jfu\A ill i-ji'iiNiiii xn i s i— f ux ¦>
A«4.U AUWUUW i X ncu I'lCjkH X IU1VC.U ftDu/E.
ES
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#HBP
IV. MATURE AMD EXTENT OF PROBLEM
SITE CHARACTERIZATION
' l ' 1 • - ' > > "M , ' In - r , C r ' r HAVE |)> >>< >'< J FROM PAST
I • - r IS . r h " r ¦ T , ,
DUCK POND
LIMED POND
RECYCLE POND
AREA
?QNDS
Mi OITOI
VD CURB
EL
iNNEL
AS WHERE SIGNIFICANT CONTAMINATION WAS DETECTED ARE
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character:
LANDFILL
OF AREAS INVESTIGATED
THE FOLLOWING VOLUMES HAVE BEEN ESTIMATED FOR THE WASTE TYPES til THE LANDFILL;
OF THE TARGET HASTES, IT IS ESTIMATED THAT 5,000 TONS OF SPENT CATHODE WASTE MATE:
PRESES- r~" , * i - 1 < ' > l> , , " .
* ¦ V - I " , is Aim 1 ~ ' i " , • ' AND CONTAIN
* EP TOXIC*
* TOTAL CYJ
* FREE CYA1
-k :
* DE
FORMER CATHODE WASTE MANAGEMENT AREAS
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:ds
SLUDGE PONDS
IBS APP, , • u . - r
3 DOKllff r \ - ' >i
iiO /I K£s£>Uiii.
ACCUMULATED, SAMPLING
POND
COVER SLUDGE
1, 970
SUBTOTAL
4,840
TfYPfcT.
1U kJ v* .K
"S FROM THE SCRUBBER SLUDGE PONDS INDICATE THE PRESH
FOLLOWING CONTAMINANTS
1,940 - 8,510
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,INED BY A LEACHATE COLLECTION SYSTEM THAT CONSISTS OF
MID
STIPIED IM 1 ' i * V " ION DITCH IDENTIFIED THE r i 1 «CE
HOMPOUNDS
8
0.11
HATE SAMPI.ES FROM THE LANDFILL DITCH IDENTIFIED THE PRESENCE OF THE FOLLOWING
2-ETHYL-
GE1ERAL HYDROGEOLOGY
2,
Q. 01
-.,cx
!HE . . " ' NANTS;
I,
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I
CONTROLLED BY THE LOCATION Of THE CHENOWETH "> '< . > " " < i 'V > k " IS
EXPECTED TO BE EAST, TOWARD THE C- . " -
JIFER WHERE IT INTERSECTS THE
j^ri (\x v &n , c juuK
iwuiuHftij *f«xfcc\™awrriux « «s\uu«L/?fftxe«€\ e-uum x« me, o syyif&n is
SOUTH; HYDRAULIC GRADIENTS VARY, HOWEVER, DEPENDING ON THE HYDRQLOG
E,
j roi
D
TO BE
LOCAL!"
CONCEIT
FREE C
ANIMAL
HEALTH
FLUC
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(1) HEAR THE LANDFILL AND F u >, , r '» FLUORIDI * ' ^ ^
FROM 1.0 MS/Ii TO 4®*? MG / L. Ifrtei C X AN i. \jk* K/u^&L' ix\Oki l*. u i* i.i/ u. 136 MG/lar .KND ouu-LO^i KAiMb&y kKuM
57.2 TO B2.2 MG/L.
f24€ TO 658
CONCENTRATIONS OF 5.5 MG/L, SODIUM CONCENTRATIONS OF 90.5 146/1,, AND SULFATE CONCENTRATIONS OF
811 MG/L.
FIGURE 4 SHC IN THE S AQUIFER.
i
CONTAMIHANTS ARE i ¦ 1 > . 1 THE h h , . V.'\R THE SCRUBBEI \ . r " 1 v „ >f OF
. i - ¦ w «
i3 n.€t r u-UAA-fWS!
> ALLOW
!
>F T)
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»
THERE INCREASE OF SUCH CONSTITUENTS AT THE
POJN11 - tfi'i"1. hk*<<
THE I't 1 , r,v, , . M -iv i> ABLE 1 - >« - '¦ r . ¦ «„ HT>» - ¦>'. • !r -
TO
iV U& U4;SJUU K*X .
LIMITS AND BELOW BACKGROUND CONCENTRATIONS. THEREFORE, ALTHOUGH A DEFINABLE MASS, THE . GE
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or
rvtr
IS STATISTICALLY
AIR
GRC
INITIAL B-AQUIFER PRODUCTION WELL
0,012 0.003
NT
EXPOSURE EVALUATION
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^ u i ' K-M' «K.-r'- . QUANTITATIVE RISK •-'!._ ULM FA ''
ruifaKXlit.u LSilAsxc^h wixA^Ujurfiit&L/ 2i#K tUifcltiinrtJuLt iSArQSED POPULAT LON W&fvr, lAilMfaX^jiU Aim k#*\ITICAL
TOXICITY VALUES.
CftRCXBQGEBXC COMPOUNDS. CERTAIN AREi
. . - . V5- r , I .TED AREAS;
10-4 - 10-2
' ' t i > i .: , > i " i 1 10-4 - 10-2
H SEDIMENTS,
HI PAHS IN SOILS. 10-4 - 10-1
TO 8 IN SEDIMENTS. 10-4 - 10-2
rfl PAHS IN POND SEDIMENTS., 10-4 - 10-2
I i .ION BY ~ IN - ' ' 17 t; ION DITCH 1. < AND
I INGESTION BY WILDLIFE OF CYANIDE AND FLUORIDE IM LANDFILL DITCH WATER;
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• I UK - i'
#KE
V. ALTERNATIVES EVALUATION
jmm-m*:, ;r -' 1 uatives &hd evaluation criteria
!
! ti - ;
I ¦ » •- I % 'MftGBMEMT AREAS,
I t - , , , md
I
i
AMI
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EVALUATION CRITERIA
SCREENING OF ALTERNATIVES
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THIS hue;
l s 'i*. -t i'. i j~ki' _- i-t4s, r ° 1 l 1 s i1.'
PROTECTION Of PUBLIC HEALT
I UNCONTROLLED WASTES WOULD
! ^ IT Li' ¦¦ U * T< I' V SIT
I TBI i-rri,rv I •' n
, >
Sr.RF.FN
COST
B THE
DR 5.
COST
I COM SOI, I DAT I Oil OP THE RESIDUAL CATHODE WASTE MATERIAL AMD UNDERLYING FILL Mi
I " I •- ¦ r f r "1 -.1' ¦- . L V'M r-(. 'Tim .r" . « -
I ' !. -.PI . 'ILL IK HACK WITH A MULTI-MEBJT \ •' . f .... ... -A
! PLACING A SOIL COVER OVER SCRUBBER SLUDGE PONDS 2 AND 3;
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! I I ; q I, ,IT. < t.crif PR-1 > 'ELLr m --rt'" r'i > »> rnr ^ :i ; , - r lles
! COLLECTION AND TREATMENT OF LEACHATE GENERATED FROM THE LANDFILL AND PERCHED MATER
! < FROM ME UNLOADING AREA;
! INSTITUTIONAL CONTROLS SUCH AS ACCESS AND DEED RESTRICTIONS; AND
! GROUNDWATER QUALITY MONITORING AND A CONTINGENCY PLAN TO RECOVER MID TREAT
VE
' I i ¦ > ' "i IY PROTECTION i\
. Gi>i_aTLY REDUCE THI"
YEARS TO IMPLEMENT UPON INITIATION 0!
i DURING
LESS THAN TWO
'IAL ACTIONS.
IMFLEMENTABILITY
mm? rnr n e c r\r* r * r\ UT«r»ti de?metvt*t »t woMRmnn? *3 xr>t? runr i?ueiwi*nTP nit muc mmo r«
UTIJ I ZED mfr% *' ^ r\rtr»rn fpirpnumrftit
ED
COMPLIANCE WITH ARARS
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t
am
TBI , [ ' 'V t , t i 'if >.'iL- i l < l • i< i „ > '
,11 "I i ' . r • > • M„ Mr ,,vlt I,. , m > • ... I, , THIS
i. f JS^S- ~S f •www s
n»T WOULD BE IMPLEMENTED UMDEK ALTERNATIVE 3» REMEDIAL ALTERNATIVE
!' -T- ' liUDGT ... - .7 . 1 . I
! I • 1> I AND 1 1 ... L .r t • > ' 1 .1- ' •> >"EN
I tai. ukuuWDWATER;
LONG-TERM
' .ON 1 . ¦ n1 I )' > _ - ' . 1 r . M -i . . t I=r- • TIOH OF
»¦ >r -<•• 1 i - .-7"- .1 : . r > . rneath the bottom
OF THE PONDS, REDUCING THE POTENTIAL FOR lei1'' •> . r. 1 ,* iDGES.
M
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SE
IMPLEMENTS
ASSOCIATED WITH REMEDIAL
1ISS10SS MAY RESULT, HOWEVER, " ' SUP'
THK ROii 111 1 < i 1 111 ' i . i " i i 111J i > 1 1 " 1 ) i L ™i : " 1 I 'i 1 i i ?rr "i
I n-1 . II r • 0 ¦ t i hi . ur - , I . I 1- , ¦ ¦ , : L , - n , i, r ,;E8
r >'t i > '• h ' i, "r< - r ', L r . t-,' ir : " " 1 1 , ¦ > > , »< ,D BE
l 11 I J I'l V M' ~ > It ' 1 : I • > -I ' I f _l_.iLE
OVERALL PROTECTION
l IM I, 1 c ¦ : ' Till CHi.KUOI3&K OijULto
COST
THE
ALTERNATIVE 5 EVALUATION
i- .i«' n •>,„ vms> '1 1 r MS CONTAINED IM ALTERNATIVE 3. REMEDIAL ALTERNATIVE 5 ADDS THE
!
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OF THE
RBt-
>E W..
; LEACHATE GENERA!
XJCES THE TOXICITY
1 Jits, sediments m
IMPLEMENTABILITY
Y TO
COl
AMD
.myE»K»
SPECIFIC AN')
.. TT?P Rt?Mp m TU
m"E
iric. 1? Lljutilljb ftWii DuiffjKic* /iRARfi, in afculliiM a v -
wuuiiLf piiiiii
f%t,h
THE CAPIT. ' , i* OF REMEDIAL ALTERNATING
THROUGH 5 ¦¦ HE 5146,000. THE ANNUAL
TOTAL PRE-* T , SRTH VALUE OF THIS ALTER!11
"JAL OSM COS
¦ IGH 30 WIL1
'3 OF 8% IS
KS
0.
0.
the
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ir ' " I ' EV->L,'i;r t
"i, • 1 nr k ¦; L-r l, > -t , r, -, . ntf i >
I v, _ > \ I >• - .-x - -- r , in .•
OVER SCRUBBER SLUDGE PONDS 2 AMD 3;
1 If AND TREATMENT FOR
SHORT-TERM EFFECTIVENESS
LONG-TERM EFFECTIVENESS
REDUCTION OF TOXICITY, MOBILITY OR VOLUME
D ARABS, IS ADDITION TO
ED
TH ARARS
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COST
ALTERNATIVE 9 EVALUATION
! STABILIZATION OF SCRUBBER SLUDGE PC
MATERIAL;
! 1 r' J 'I* , *80 TREATMENT
LONG-TERM
#e» c\jksu * xn a iv/wviii \j& ' \
f» THE CONTAMINATED SOILS ¦» l- • BEK
ATIVF. WOUI.I
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¦E
COMPLIANCE WITH ARABS
DALLES,
5. IN
AM
COSTS
THE OTHER ALTERNATIVES
i n OF ALTERNATI¥ES AGAINST COMMUNIT' i > i •' - CE CRITERION
iMoixo n i inc. one..
«SA
VI, SELECTED ALTERNATIVE
RESIDOS i""'OD£ WASTE MATERIAL i P "i 1 i, MA' • FROM
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I
!
«
I GROv 1.1 n- • ,lTf MONITORING ANZ " OTINGENCY PLAN TO )N>-t \ >i -• ' AL RECOVERY
-r " ,'s <„ ' '• r* r— EVENT THAT r«ln>Uft CONTAMINATION If ' OR
col1 I CI • -- I r ¦ ! - 1 "i>r , , I - .'K ;i,', • ^ i~ - . limit
THE ACTUAL LATERAL EXTENT OF THE CAP. THE UNLOADING AREA AMD FORMER CATHODE WASTE MANAGEMENT
o,.<;jjf. i.u r„ ,v;:.i:x u. .v..:,xt :,t.„ <¦. < i ' C i ',1.1' EXISTING LANDFILL PRIOR TO ' i - 'PING,
S
A
S
D
MANAGEMENT AREAS WILL BE REMOVED AMD
LANDFILL.
E
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S.B.EA
m OF
7.
C FROM
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RAM
XW i i HID
m
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"*"HJIR1'
I MID
THE SELECTED REMEDY IS PROTECTIVE OF HUMAN HEALTH AND THE ENVIRONMENT
I PREVENTING EXPOSURE TO CONTAMINATED SOILS BY COMSC
! ( M " f ' i > GENE OF i " FROM T!
I INSTITUTIONAL COIfTROLS SUCH AS DEED RESTRICTIONS I
THE SELECTED REMEDY ATTAINS ARMS
S/Ii.
3 or
OF
AL AND
OF
3) TO
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OR
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#BES
APPBHDIX B
RESPONSIVENESS SUMMARY
< . AND
about p:
SITE H , •• f iPPEf
THESE T ¦" ' " ¦ ',S W '
M, ECONOMY, AND
.MARIETTA HAD PRE'
INSTALLED NEW FLUORIDE
ULT Of
I1PMEMT.
JIT, MARTIN
WO
BACKGROUND ON COMMUNITY CONCERNS;
08
K WAS C
EXPRESSED, HAS £ SNTLY
-> ' CI * ~ M,
¦ - " SELE n > ' 2MEDY
OF
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THIS SUPERF' . t' ir< > l! FOCUSSED OH ilAZARDOUS ! > " ',»! -? i>T v
vpr.M PUCT PEnCiiufaa, tr« UliJ NOT IDENTIFY ANY SIGHil " " , I I EMI'
FOUND,
COMMUNITY RELATIONS AND CONCEI .ING PUBLIC COMMENT ON THE RI/FS;
TIONAL COMTROLS HAVE BEEN DISCUSSED AMD EXACTLY WHERE IS THE AGENCY PROPOSING
AT ! SO
EPI
}
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S SHOULD BE 111 FORMED OF MONITORING PLANS. ALL ¦' ' t.-WE BEEN
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*
4 •
mm
1
DATES
1960
illB
1970 JBER SYSTEM ADDED TO PRIMARY AIR
SlSTE PLANT, AMD PLAN" > - >' . IS
1980 ED III THE SCRUBBER
1984
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I ¦
>'U <
MG/1, {G}
IT OF THE
war
THE M1
X 11 <1^4 It
CI
(GJ
{HI
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S , r , » 18S, 19S, ¦ ,
A > >-> , VA, 8A, 91, 10A, '• ' Uh, 15 A,
B " SB, !®, , -> < , . • i
OTHER WETH IRRIGATION 1, 2, AND 3
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