8/11/2019 PROPOSED PLAN Madison Metropolitan Sewerage District Superfund Site

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EPA

United States

Environmental Protection

Agency

Officeof

Public Affairs

Region5

77 Wes t Jackson Blvd.

Chicago, IL 60604

Illinois

Indiana

Michigan

Minnesota

Ohio

Wisconsin

;f 1

3

EPA

Region5 Records Ctr.

Public

Comment Period

235637

U.S.

EPA

w i l l

accept

w r i tt e n

comments

on the

Proposed

Plan dur inga30-day p u b l i ccomment period from

November

18

through

December 18 ,

1996.

PublicMeeting

U.S. EPAw i l l hold apub l ic meet ing toexpla in th e

Proposed

Plan and the other cleanup alternat ives

consid-

ered

for the

site. Oral

and

writ ten commentsw i l l

b e

acceptedat the mee t ing .

e:

Time:

Place:

Tuesday,

No vember

19 ,

1996

7

p.m.

Madiso n

Mun i c i pa l

B u i l d i n g

R o o m L L l l O

215

Mart in Luther King,

Jr .

Boulevard

Madison, Wisconsin

PROPOSEDPLAN

Madison

Metropolitan

Sewerage

District

Superfund Site

BloomingGrove,

Wisconsin

November

1996

Introduction

This Proposed Plan

identifies

the U.S.

Environmental Protection Agen cy (U.S. EPA)

cleanup recommendation

for the

Madison

Metropolitan Sewerage District Superfund site

(Madison M etro site)

in

Blooming Grove,

Wisconsin(Figure 1). U.S.EPA isproposing

Remedial Alternative 4(RA-4), w hich w ould

includeconstru cting dikes, consolidating con-

taminated

sludge,

an d

covering

the

sludge

wi th

anapprov ed cap. Itw ould a lso include

monitoring

and

m aintenance activit ies

and

future deed restrictions. U.S. EPA's recom-

mendat ion

is

based

on

information collected

dur ingthesite remedial investigation/feasibil-

ity study(RI/FS)and a riskassessment,

which evaluated potential

health r isks

posed

by site contamination

1

.

Public input on theal ternat ives and the infor-

mat ion

t h a t supportsthesealternativ es is an

important

contribut ion to the

cleanupremedy

select ion process. Based

on new

information

or p u b l i c comment .U.S .EPA m ay modify

the recommended

al ternat ive orselect

anoth-

1

Section 117 a)

of theComprehensive Environmental

Response.

Compensation,a na

Liao- i

ty A ci

iCERCLA) requires publication

o f a

nonce

and a

Proposed Plan for possible site remediation . Tne Propo sed Plan mustalso be made available to t^e public for com me nt Tnis Proposed Plan is a summary

of in format ionincludedin the

Feasibility

Study Report Septem ber 1996) and other docum ents .n the

Aa m m i s t r a t i ve

Reco rd for the site Please consult the

FeasibilityStudy Report a long

w th the

Admin is t r a t i ve Reco

r

?

for the

si te,

f or

more deta i led rfo

r

rra:

on

- _ l

/

Treatment

| | ^ s . Plant Facilities

8/11/2019 PROPOSED PLAN Madison Metropolitan Sewerage District Superfund Site

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eralternativepresentedin this

planand/or

the FSReport. The

publicisencouraged toreview

andcomment on all technolo-

gies

andalternatives considered

for th e

Madison Metro site.

SiteBackground

The

Madison Metro site con-

sistsof two lagoons that cover

approximately 140acres. The

lagoons were constructed in the

1940sand

1960s

to

provide

storageforsew erage s ludge

generated

at the

plan t . N ine

Spr ings Creek f lows along th e

south and east site borders.

Several drainage ditches run

along other site borders and

empty in to

the

creek.

T he

sludge lagoon system

at

the s i te operated w ithou t prob-

lems

un t i l

April 1970, when

part of the Lagoon 2 dike col-

lapsed, releas ing about

85

m i l -

l ion gal lon s of the lagoon's

conten ts to an adjacent d i tch .

The Dis t r ic t subsequ ent ly

repaired thed ike .

N a t i o n w i d e concern arose

abou t

thepoten t i a l

adverse

env i ronmenta l and

hea l th

effects of po lych lor ina ted

b i p hen y l s( PCBs) .

w h i ch

had

been found in

m u n i c i p a l s lu d g e

in otherc o m m u n i t i e s . T h i s

concern led theS e w e r ag e

Dis t r i c t

to beg in v o l u n t a r i l y

a n a l v / i n i i i t s

.sludge

forP C B s .

In late 1982, duringaroutine

analysis

of lagoon sludges, the

District detected PC B concen-

trations above

50

parts

per

mi l -

l ion (ppm), th e legal l imit

allowed by the federal Toxic

Substances Control

A ct

(TSCA).

Because th e District sold

processed

s ludgea s aferti l izer

andsoilcondi tioner through

its

Metrogro program,sludges

containing

PCB

concentrat ions

above50 ppm were separated

to prevent their use in the pro-

gram. Farmers co nt in ue to use

Metrogro sludge

as a

fer t i l izer ,

butal l s ludge used is w ith in the

regulatory

l imit (below 50

p p m )

for PCB

content .

Hazard assessments conducted

by

U.S.

EPA in

1983

an d

1986

determined lagoon s ludge s

posed a potentia l threat to pu b-

l ic heal th

and the

e n v i r o n m e n t .

In 1990,

th e

site

w as

placed

on

U.S. EPA's Nat iona lPr ior i t ies

List( N P L ) ,aroster ofhaz-

ardous w as tes i tes e l ig ib l e for

c l ean u p u n d e r the federal

Super fund

p r o g r a m .

In

J an u a r y

1992, U.S . EPA and

the Dis tr ic t s igned an

agree-

m e n t ,

ca l led a Consen t Order ,

r e q u i r i n g

the

Dis t r i c t

toc o m -

p le te

a s t u d > d e f i n i n g the

ex t en t o f con t amina t ion ( an RI )

for the

s i t e , f o l l owed

bv a

f e a -

sibil i ty study (FS) to evaluate

possible cleanup opt ions.

After

th e

Distr ict comp leted

the first

round

of RI

sampling,

U.S. EPArequested ad dit iona l

sampl ing

and

monitor ing

to

more ful ly def ine s i te condi-

tions.

Thesetwo

separate sam-

pl ing

eventsarereferred to as

Phase

I and

Phase

II of the RI.

All U.S. EPA comments and

data produced from Phase I and

Phase

II

were incorporated into

the final R I repor t , whichw as

submit ted

to

U.S.

EPA in

September 1996.

The RI

indicated that PCBs

were present in Lagoons 1 and

2 at

concentrat ions ran ging

from

1.1 to 17 0

p p m .

The

h ighes t leve l s w ere de tec tedin

the nor thw es t co rner of Lagoon

2,

w h e re

the

Dis t r ic t

had

at tempted tosegregate s ludge s

w i t h the

h i g hes t

PCB

co ncen -

t ra t ions .

L ow leve l sof vo la t i l e

organicco m po unds ( VO Cs) ,

one

semiv o la t i l e o r gan ic co m-

pound (SVOC) , pes t ic ides ,and

severa l m e t a l s w e r e a l s o

detected in s a m p l e sco l lec ted

from

L a g o o n s

1 and 2.

The RIalsoprov ided thef o l -

l o w i n g in fo rma t io n :

P C B s w e r ede tec ted i n t w o

ot f ive pea t s am p lesfrom

the

bot tom of the lagoons ,

b e n e a t h

the

s l u d g e .

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Relatively low levels of

VOCs,

one

SVOC, pesti-

cides, and several metals

were

alsodetected in peat

samples.

PCBs,oneVOC,andsever-

al metals w ere detected

at

low levels in all three

lagoon sludge samples.

Lowlevelsof one VOC and

several metals were detected

in

ground-water

samples.

Low

levels

of

PCBs

were

detected instream sedim ent

samples.

Following

the RI, the

District

conducted

a risk assessment.

The risk

assessment consisted

of ahum an heal th evaluat ion

and an

ecological assessmen t,

whichw ere used

to

assess re a-

sonably anticipated

future

site

w i t h regard

to

_ ian healthand ecological

risks. The District submitted

th e final risk assessment report

to U.S.EPA inSeptember

1996.

The FS focused on the portions

of the s i te conta in ing

s ludge

wi th PCB

concen trations

at or

greater

than 50 p p m . Dur ing

the

FS. 10cleanup a l ternat ives

for th i s s ludge w eredeve loped

and

eva lua ted ,

us ing the n in e

e v a l u a t i on criteria l i s ted in

Figure2.

U.S.

EPA has deter-

mined that

other

sludges,w i th

PCB

concentrations below

50

ppm,can be safely managed

throughaland application pro-

gram.

Summary

of

Site

Rsks

U.S. EPA is concerned abou t

elevated

concentrations of

PCBs at the Madison Me tro

site

because long-term expo-

suretoPCBs at

those

concen-

trations

could have adverse

effects

onhum an heal thand

th eenvi ronment . D ur ingthe

RI/FS,

U.S.

EPA determined

that

sludge

hasbeen

adequately

containedin the lagoon system

an d

does

notposerisks to

humanhealth; how ever, con-

servative assumptions indicate

thatexposuretosludge con-

ta in ing

PCBconcen trations

above 50 ppm could pose an

ecological

risk to

area

wi ld l i f e .

PCBs canonl y have adverse

effects

through exposure,

such

astouchingcontaminated

s ludgeor

soi l , ing est ing con ta-

minated

part icles,

or

i n h a l i n g

organic

vapors . Al ternat ives

developed

for s i te c lean up

inc ludem easures

to

reduce

o r

e l i m i n a t e the

p o s s i b i l i t y

of

exposure

to

site

con tam i n an t s .

Summary of Alternatives

As

part

of theRI/FS,U.S. EPA

identif ied and

evaluated alter-

native s that could

be

used

to

address threats or potential

threats posed by the site.

U.S.

EPAconsidered 10c l eanup

action alternativesfor the site:

N o Action (RA-1)

RA- 1 involvesnoact ive

cleanup

or long-term manage-

men t at the

site.

A

No-Act ion

alternative is

required

by law to

give

U.S.EPA abasisfo rcom-

parison.

Est imated

Cost: 0

Institutional

Controls (RA-2)

RA -2 involves dike construc-

t ion to isolate andconsol idate

s ludge containing PCB concen-

t ra t ions

at or

above

50

p p m .

This

would facil i tate

future

remova l and land appl icat ion

act iv i t ies

fo r

sludges contain-

ing

concentrat ions below

50

ppm. This alternative also

i nvo lves the continuation of

current

rout inea ct iv i t i es,

i n c l u d i n gs ludge managemen t ,

main tenance

of

exis t ing ,natur-

al vegetat ive

cover ,

d i ke

mon i -

tor ing and mainten ance,

ground-w a te r moni to r ing , and

deed

restr ict ions

on future site

use .

Est ima ted Cost: S425.000

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BeneficialReuse(RA-3)

RA-3 invo lves

a

special PCB-

handling approach

to

remove

s ludgew i th

PCB concentrat ions

at

or

above

50 ppm and

recycle

th e

s ludge

for

agricu l tura l use.

Estimated

Cost:

8.8 M ill io n

In-PlaceCapping

(RA-4)

RA-4 inv olve s dike construc-

tionto

isolate

and

consolidate

sludge containing PCB concen-

trations

at or

above

50

ppm.

Lagoon

areasnot

already cov-

ered by natural vegetation

w o u l d then be covered with soil

and

seeded. This alternative

alsoinclude s moni tor ingand

maintenance activit iesand

future

deed restrictions. U.S.

EPA

recommends RA-4

because itprovidesth e best bal-

ance

w i t h

respect to the nine

evaluation criteria (see Figure

2) .

Est imated Cost: 1.8

M i l l i on

In-Situ

Solidification/

Stabilization (RA-5)

R A 5

invo lvesd ike const ruc-

t ion

to isolatean dconso l ida te

s ludge

con ta in ing

PCBconcen-

t ra t ionsat or

above

50

p p m .

R A 5

also

i n v o l v e s

in -p lace

s ludge t rea tment

and

c o n t i n u a -

t ion

of i ns t i t u t i ona l con t ro l s as

descr ibed inR A - 2 .

E s t i m a t e d Cost : S23-S28

M i l l i o n

Ex-SituBiological

Treatment

-

Reuse Residue

(RA-6[a])

RA-6a inv olv es removal and

biological treatment of lagoon

s ludge w i th

PCB

concentrations

ator

above

50ppm. Treated

sludge

w ou ld

be

recycled

fo r

agricultural use.

Estimated Cost:

$44-$66

Mil l i on

Ex-Situ

Biological

Treatment

-

Landfill Residue(RA-6[b])

RA-6b is similar to RA-6a,

except treated sludge would

be

disposed

of in a

Wiscons in solid

was te

landf i l l

rather thanbe

recycled.

Estimated Cost:

$64-$89

Mil l ion

Ex-Situ ChemicalTreatment-

Landfi l l Residue (RA-7)

R A 7

invol ves removal and

chemical t re atm ent of lagoon

s ludge

w i th

PCB

concentrat ions

at or

above

50

ppm . Treated

s ludgew o u ldbe disposed of in

a

solid

was t e landf i l l .

Estimated Cost:$58-$73

M i l l i o n

TSCA Landf i l lDisposal( R A -

8)

R A 8

i n v o l v e s

r em ov a l

andsta-

b i l i za t i o n of

s lu d g e

c o n t a in in g

PCBc o n c e n t r a t i o n s at or

a b o v e

50 p p m .fo l lowed by d i sposa l of

the s t ab i l i zed

s l u d g e

in a

T S C A - p o r m i t t e d

l a n d f i l l .

E s t i m a t e d Cost

S I 6 0 - 5 1 6 8

M i l l i o n

4

WisconsinSolidWaste

Landfill

Disposal( R A - 9 )

RA-9 i nvolve s removal

and

sta-

bi l izat ionof s ludge conta in ing

PCB

concentrations

at or

above

50

ppm, fol lowed

by

disposal

of

the stabil ized sludge in a

Wiscons insolid waste landfi l l .

Es t imated

Cost:

$40-$53

Mil l ion

U.S.EPA

Recommendation

U.S. EPA recommends In-

Place Capping (RA-4).

RA-4 would protect human

health

and the

environment,

beeasy to implement, com-

pl y

w ith state

and

federal

regulations,

reduce move-

ment

of

contaminants ,

an d

becost

effective.

The

Next Step

Before se lec t inga finalc l e a n u p

p l a n ,

U . S .EPA

w i l l cons ider

com m en t s

rece iv edd u r i n ga

30-day p u b l i c

c o m m e n t p e ri o d

from N o v e m b e r18

th rough

December 18, 1996. The

c l e a n u p p lan wi l l be

descr ibed

i n a f i n a l dec is ion document ,

ca l l ed

a

record

of

dec i s ion ,

w h i c h

w i l l

be ava i l ab l e fo r

p u b l i c rev iew in ear ly

1997.

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PublicCommentSheet

Your input

on U.S. EPA's Proposed Planfor the Madison M etro

Super fund site

is impor tan t . Pub l ic comments

assist U.S. EPA in

selecting

its finalcleanup p lan.

Y oum ay use the

space

below to

write your comments about U.S. EPA'sProposed Plan. Com ments must

be

postmarked byDecember 18 , 1996. If you hav e questions abo ut th e comment period, contact Susan Pastor at

312-353-1325 or

1-800-621-8431.

Thosew ith e lec tronic com mun icat ions capabi l i t iesm ay submit their com -

men ts to U.S. EPA via In ternet to: pas tor .susan@ epamail .epa .gov

N a m e :

Address:

C i t y :

Sta te :

Z i p : _

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6/8

Madison Metro Superfund Site

Public

Comment Sheet

Fold

on

Dashed Lines, Staple.

Stamp,andMail

N a m e _

A d d r e s s ^

Ci ty

Z ip

St a l e

Place

Stamp

Here

Susan

Pas tor ( P - 1 9 J )

C o m m u n i t y I n v o l v e m e n t

Coord ina tor

Office of Publ i c Af fa i r s

U.S.

EPA . Re g i on

5

77

Wes t J ackson Boul eva rd

Chicago . 1L60604

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Evaluation

able

Figure2

EvaluationCriteria

Remedial Remedial Remedial Remedial Remedial Remedial Remedial Remedial Remedial Remedial

Alternative Alternative Alternative Alternative Alternative Alternative Alternat ive Alternative Alternative Alternative

1

2 3 4 5

6(a)

b ) 7 8 9

No

Action

1 . Overal l Protection of

Health

&

Envi ronment

2.Compl iance wi th AR AR s

3

Long

Term

Effect iveness

and

Permanence

4.

Reduct ion

ofTowci ty. Mobihty .

or

Volume

through

Treatment

5. Short-Term Effectiveness

6.

Implcmentabi l i ty

7. Cost

8.

Support

Agency Acceptance

9.Commu n i tyAcceptance

D

D

D D

NA

$0 $425,000

8.8

$1.8

23-28

$44-66

S64-89

58-73 160-168

$40-53

M i l l i o n Million M i l l i o n M i l l i o n M i l l i o n

M i l l i o n

M i l l i o n M i l l i o n

The

Wisconsin Department

of

NaturalResourcesacceptsU.S. EPA's recommended alter native

C o m m u n i t y

acceptance

of therecommended alternative

w i l l

beevaluated afterthepublic comment

period.

|

Fullymeets criteria **'

Partially

meets

criteria | |Does

ot

meet c riteria

NA-Not Applicable

Evaluation

Criteria

U.S.

EPA

used

the

fo l l ow i n g

nine criteria

to

evaluate each

alter-

nat ive. The

Evalua t ion

Table (Figure2)compares th e alterna-

t ives to

these criteria.

Overall

Protection

of Human

Health

and the

'Environmentdetermines whetheranalternative eliminates,

reduces,

or

controls threats

to

public

healthand the

environment

th rough

ins t i tu t iona l

controls, engineering controls,o rtreat-

ment .

2. Compliancewith Applicableor Relevantand

Appropriate Requirements (ARARs)

ev a l u a t es wh e th e r

th e

a l t e rn a t i v e

meetsfederal and

state env i r o nm en t a l statu tes ,

regu-

l a t ions , and

otherrequ i r emen t s

that pertain to the s i te or

w he t he r

aw a i v e ris

justified.

3. Long-TermEffectiveness and Permanenceconsidersthe

ab i l i ty of an

al te rna t ive

tom a i n t a i n

protection

of

h u m a n

health

and the e n v i r o n m e n t ov er

t i m e

and the

r e l i a b i l i t y

of suchpro-

t ec t ion .

4. Reduction of Contaminant Toxicity, Mobility,or Volume

Through Treatment

e v a l u a t e s

a n

a l t e r n a t i v e ' s

use of t re a tme n t

to

reduce

the

ha rmfu l effec ts

of

pr i nc i pa l

c o n t a m i n a n t s ,

t h e i r

ab i l i t y

to mo ve in the

e n v i r o n m e n t ,

and the

a m o u n t

of

contami-

na t io n presen t .

5. Short-Term

Effectiveness considers

thelengthoftime need-

ed to

implement

an

alternative

and the risks the

alternativeposes

to

workers, residents,

and thee n v i r o n m e n t

during

i m p l e m e n t a -

tion.

6.

Implementabilityconsiders

the

technical

and

administrative

feasibi l i ty of imp lemen t i ng th ealternative, suchasrelative avail-

abil i tyof

goods

and

services.

7. Costincludes estimated capitalandoperationandmainte-

nancecosts,as

w e l l

aspresent worth costs. Present worthcostis

th etotal cost of an al ternat iveover t ime intermsoftoday' s dol-

lars.

8.

State

Acceptance considersw h e t h e rt hestate agrees w i t h

U.S.EPA's an a l y ses and r e c o m m e n d a t i o n sof theRI/FSand the

Proposed P lan .

9. Community Acceptance

w i l l

beaddressed in theROD.

C o m m u n i t y acceptanceof therecommendedc lean up ac t ion w i l l

b e

e v a l u a t e d af te r

th e p u b l i c

co mment pe r i o d

and before the

record oi d e c i s i o n i s

i s sued .

P u b l i c

c o m m e n t s

and U.S.EP A

responses to thosec o m m e n t s w i l l b e presen ted in the resp on s i v e -

nes - , summarx .

w h i c h w i l l he a t t a ch ed to the recordo f

d e c i s i o n .

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Additional Information

Ifyouhave questions abouttheinformationinthisfactsheetorwould like additional information aboutthe

Madison Metro Proposed Plan, please writeorcalltheind iv idua lslisted below.

U.S.

EPA

Contacts

State of

Wisconsin Contacts

SusanPastor(P-19J)

Community Involvement

Coordinator

(312)353-1325

BobWhippo (SR-6J)

Remedial

Project

Manager

(312)886-4759

Toll-Free:

1-800-621-8431

U.S.EnvironmentalProtection

Agency

77

West Jackson Boulevard

Chicago, Illinois 60604

Larry Lester

StateProject

Manager

(608)

266-7596

Wisconsin Department of Natural

Resources

Bureau

o fSolida ndHazardous Waste

P.O. Box7921

Madison,Wisconsin 53707

Chuck Warzecha

Hydrogeologist

Wisconsin DMsionofHealth

1414E.

Washington, Room

96

Madison,W I 53703-3044

(608)

267-3732

Th eProposedPlan,

Community

Involvement Plan,

fact

sheets,and othersite-related information areavail-

able

forreviewin thesite information repositories at theMadison Public Library,201West Mifflin

Street,Madison,

and the

Madison Metropolitan Sewerage District, 1610Moorland

Road,

Madison.

An

Administrative Record file,w hichcontainsthe information upon

w hich

theselectionof thecleanup plan

will

be

based,

hasalsobeen established at the

Madison Public Library.

EPA

Office of

Public

Affairs(P-19J)

U.S.

EPA

Region

5

77WestJackson Boulevard

Chicago,

Illinois

60604

Bob

Whippo SR-6J)

USEPA

77W. Jackson B lvd.

Chicago, IL6 6 4