north shore gas south plant mgp site (sa) waukegan, il · 2016-02-11 · table 5. soil summary...

North Shore Gas

South Plant MGP Site (SA)

Waukegan, IL

January, 2014

RI Findings

Agenda 1. Introduction

2. Site Description/History

3. Nature and Extent of Contamination

4. BLRA/RAOs/CSM/ARARs

5. Alternatives Array Screening Discussion

6. State/Community/PRP Perspectives

7. Q/A

Site Description • Located near Waukegan Harbor • Former MGP property (2 acres), plus nearby

properties where MGP contaminants were discovered (approx. 20 acres): WPD (marina/adm. bldg/parking lots) Akzo Nobel Aerospace Coatings Elgin, Joliet, and Eastern (EJ & E) tracks & ROW City Of Waukegan ROW

• Zoned for commercial/industrial use

U.S. Environmental Protection Agency

lsiTEI

0 2000 4000 -n-tl3 CI<RAWING WA.3 OE'-'ELOF'ED ~ '"'F~ ' · SrTE LOCA.TX>K lloollAF'...a-v"". BY B URN.B UCOON~ EH EER.lNlG c:x:»Jr;>~. INC... SCA LE I N FEET

S ITE LOCATlON MAP

REMEDIAL INVESTIGATlON REPORT F ORMER SOUTH P LANT MGP

NORTH SHORE GAS OOMPANV VVAU KEGAN. ILLINO IS

CHK"D: E.?K DATE: ~2."04.' .. 2 APP'D: .JMK 0111. TE: ~:2.f06M2

FJGURE NO • ..

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I

I ,

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.. (rl APPROXIMATE PROPERTY BOL DARJES ~~------~~~------------~L---~---

PRO.ECTMllC

FIGURE 10 g

Former MGP property – looking north

Waukegan Harbor Marina – looking east Akzo-Nobel property

Former MGP property – looking southwest

EJ & E railroad tracks

Site History

• MGP constructed in 1897 • Operated from 1898 to 1946 • Ownership Waukegan Pipeline Service Company (1897) North Shore Gas (1900) Integrys (2006 - present)

1937 Photo

-;;!~Z ~u i3

"0 :!! ~

~ e fil ~ ~ ~ ~ i

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APPROXIMATE MGP FACILITY BOUNDARY (1937)

REM E DIAL INVESTIGATIO N REPORT, REVISIO N 1 FO R M ER SOUTH PLANT MG P

NORTH SHORE GAS COM PANY \1\11\UKEGAN. ILLINOIS

OfVMIN BY .<>ATE. T OC 10/17113

REVIEWED BY/DATE. EPK 10/1111 3

APPROVED BY .<>ATE a>K 10/17113

Site History

• MGP facility demolished in 1951 (above-ground structures removed) Coke ovens Tar/oil tanks Gas holders Coal shed Office building

1970s Aerial Photo

1980s Aerial Photo

Site History – Cont’d

• State inspections (2 in 1991) 1991 CERCLA Preliminary Assessment Report 1992 CERCLA SSI Report Recommended placing site in CERCLIS and assigned medium

priority status

• PRP investigations 1993–2007 (soil & gw)

• 2003 – 2004 response action Excavated contaminated soil above water table Plastic liner between clean fill and potentially impacted soil below

water table

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Site History

• PRP request for MGP sites placed under federal program – 2006

• Superfund Alternative Sites (SA)

• Multi-site RI/FS AOCs 2007 and 2008

Multi-Site Investigations

• 19 MGP Sites in IL (13) and WI (6) • Similarities

Same PRP Facilities dismantled/parcels redeveloped Located near a water body in urban areas Shallow gw impacted (not drinking water source) Similar COPCs in gw, soil, and sediment

• Multi-site support documents developed

Multi-site Support Documents

• Health & Safety Plan • QAPP • Risk Assessment Framework (HH and Eco) • CSM • FS

Nature and Extent of Contamination

RI Report

• Draft 12/2012; Final 01/22/2014 • Media: GW, Soil, Sediment, Soil Vapor, and SW

• Constituents of Potential Concern (COPCs) PAHs PVOCs (BTEX + trimethylbenzenes) Cyanides/Phenols Metals

Groundwater

• GW sampling 2009 – 2012: 8 quarterly rounds + 2 semiannual rounds

• 85 monitoring wells

• Data compared with EPA RSLs, Illinois TACO values (residential and industrial), and MCLs

Groundwater

• Primary west to east flow (towards the lake) Depth to gw: 6-8 ft. bgs

• NAPL observed at MGP, WPD, and Akzo • Site-wide PVOC and PAH plume

Benzene Naphthalene Benzo(a)pyrene

Note: Marina sheetpile wall/bulkhead down to clay layer – may be impeding

gw flow to sw along marina

PROJECT NO: 1983

AGURE NO: 28A

--GROUf'<DWATER ELEVATION CONTOUR

---+ GROUIIIDWATER FLOW DIRECTION

(~ APPROXIMATE PROPERTY BOUNDARIES

& MONITORING WELL LOCATION

~ 5ug.1

• - , .. 5llg!11t\FERRED

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500 ug/1

t~j APPROXIMATE PROPERTY BOUNDARIES

0::: w ~

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PROJECT NO: 1983

FIGURE NO: 33A

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PROJECT NO: 19!!3

FIGURE NO: 56A

... , J 0.13 ug.U•IFERRED

APPROXIMATE PROPERTY BOUNDARIES

NOTE. IL RESIDENTIAl GROUNMATER SCREENING LEVa FOR NAPHTHALENE = 140 pg.t

5 MONITORING WELL LOCATION

'""\..., 140 ug/1

140 ug/I INFERRED

APPROXIMATE PROPERTY BOUNDARIES

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PROJECT NO: 1983

FIGURE NO: 46A

Soil

• Sand/silty sand underlain by clay layer

• DNAPL extending from MGP facility to parts of WPD and Akzo properties

• Exceedances of SLs (residential or industrial) for PVOCs, PAHs (incl. all cPAHs), and metals

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Note: Cyanide (<SL of 78 mg/kg) & Thallium not used in HHRA. Arsenic SL s/b 610, instead of 390 – based on revised 10/13 HHRA

Table 5. Soil Summary Statistics for Parameters Exceeding, the Soreening1 Levels Nor1ll Shor(' Gas- FoiTTler Waukegan Souih Plant Manufactured Gas Plant s·.e 2 Nol1b Prii g Road & 1 South Pershing1 Road, Wa kegan., Uli eMs USEPA llD9848002281111in.ois EPA #097 Ul00058

Samples Samples

Minimum Residential Soil SL Parameter (pgfkg) Exceeding Maximum (Jig/kg)

Analyzed the MDL

(Jiglkg) (IJQ/kg)

Volatile Organic Compounds. (VOCs) :Benzene 16Q 24 5.7 UlO,OOO 1,100 Bhylbenzen(' 165 48 8.9 1,000,000 5,400 Total X~enes 165 44 13 7,800,000 e:ro.ooo 1, 2. 4-T rimeth)'lbenzene 6 2 6 62,300 62,000

Polynuclear Aromanc Hydrocarl>ons (PAHs :s~o{a)an.thnroen.e 164 113 27 500,000 150 :s~o(a)pyren.e 164 114 29 430,000 15 :s~o(b)ft'Uornnthene 164 110 30 210,000 150 :s~o(k)fluoranlhen.e 164 108 29 ~0.000 1,500 Camazol(' 128 19 200 34,000 32,000 Chrysen.e 164 115 27 510,000 15,000 Olbenz(a, h)an.lhracen.e 164 88 26 40,000 15 lndeno( 1 ,2,3-cd)p~ene 164 114 26 110,000 150 2-t.lethy!naplllhalene 133 44 180 ~0.000 2:MJ,OOO ~phthalen(' 168 106 30 4,000,000 3,600

Inorganic Compounds Antimony '132 e 1.500 130,000 31,000 Arsenic' 1~ 142 540 32,000 390 ( 13,000) CyarUde 134 23 33{) 68,000 47,000 Iron 96 ~6 2,300,000 57,000,000 55,000,000 lead '165 1!34 11 1,400,000 400,000 Thallium 30 '1 1 000 1100 780

Noes

Samples Ex!ceeding Industrial Soil SL

Residential S L (pgfkg}

3 5,400 21 27,000 5 2,700,000 1 260,000

90 2,100 '114 210 86 2,100 38 21,000 1 290,000 1!3 210,000 8B 210 00 2,100

2 2,200,000 37 118,000

1 410,000 142 (7) 1,600 !13,000)

1 610,000 1 720,000,000 4 800,000 1 10 000

t The arsernic screening criteria. (residential and industrial) is 13,000 ~gJkg, which is the background conoontrntiorn for metropo ~an counties of IDioois as presented

Samples Exceeding

Industrial SL

1 13 1 0

41 83 46 5 0 1

53 25 0 23

0 102 (7)

0 0 1 0

in tile ll~nois l iered Approoch fo Corrective Action Objectives (TACO-Tab e G). Concentrations and ~ rnples exceeding the TACO Table G are ~sted in parenltleses. Re~er o Table E1, Appendix E for a lismg of para.me:ers analyzed. ~9'kg = niorogram per kilogram MDL = M5hod etecti011 limit Sl = Saeening Le11el

Sediment

• Sampled 2009 (marina) and 2011 (Lake Michigan)

Used soil SLs for human health/threshold and probable effect concentrations (TEC/PEC) for eco

Residential SLs exceeded for 5 cPAHs Industrial SLs exceeded for 2 cPAHs One exceedance of TEC in surface sample Along beach, exceedances of residential and eco SLs Exceedances of PECs limited and at depth

Note: HHRA used sediment data from 0-2 ft. interval only; # of exceedances shown in table may be correct, but doesn’t reflect the HHRA

Table 20. Lake Michigan Sediment Summary Statistics for Parameters Exceeding Human Health and Ecological Screening Levels North Shore Gas -Fo rmer Waukegan Soutfl Plant ManufachJred Gas Plant Site 2 North Pershing Road & 11 South Pershing Road, Waukega11, Illinois US EPA ILD984809228 I Illinois EPA #0971 9DOD!t8

Samples Samples

Minimum Maximum Residential Soil Samples

Ecological SL -Samples

Parameter (pgl'kg) Exceeding Exceeding Exceeding the Analyzed

the MDL (IJglkg) (~gfkg) SL (IJgfkg)

Residential SL T1EC (~gfkg)

TEC Volatile Organic Compounds (VOCs}

:Benze,ne 72 6 49.2 893 1,100 0 308 t E~y[beru:ene 72 13 11.6 13,900 5,400 2 459 5 Xy1enes. Total 72 HI 30.7 6,940 630,000 0 465 5

Polynuclear Aromatic Hydrocarbons IPAHs} Acenaphlhene 73 57 2.Q 38,400 3,400,000 0 396 6 Acenaphihylene 73 32 3.3 6,320 3,400,000 0 365 1 Anthracene 73 5Q 5.4 24,900 17,000,000 0 57.2 22 :Benzo{a)anthracoene 73 68 3.3 13,000 150 16 (1)-' 108 24 :Benzo(a)pyrene 73 66 3.6 8,790 15 57 (10)" 150 15 :Benzo(b}ftuoranthe,ne 73 66 4.2 3,820 150 14 {1)-' 788 4 :Benzo(k)fluoranihene 73 63 3.Q 6,230 1,500 1 791 3 Oht)'S€ne 73 6Q 4.1 12,500 15,000 0 166 16 Auoranthene 73 66 10.5 24,800 2.300,000 0 423 13 AuorE!ille 73 52 5.2 17,400 2.300,000 0 77.4 10 Naphthalene 73 5S 4.0 110,000 3,600 3 (1)' 176 7 Phenanthrene 73 6Q 7.2 71,400 17,000,000 0 204 21 Pyrene 73 68 3.6 32,600 1,700,000 0 195 24 Total PAHs 113} 73 71 7.7 370,160 NA 0 1 61 0 21 .Benzo(ghrJpery!ene 73 67 2.3 2,940 1,700,000 0 882 2 Dibenz(a hJanthracene 73 4S 5.8 1,150 15 30 (3)-' 33 16 .lndello(1 .2 3-cd)pyre-ne 73 1)2 4.8 2.,520 150 8 (1)' 899 1

Inorganic Compounds Copper, Total 67 67 2000 436,000 3,100,000 0 31,600 10 Lead, Total 67 67 2300 428,000 400,000 1 35,800 11 Mercury, Tolal 66 66 3.4 670 23,000 0 180 1 Nickel r ,otaJ 67 67 3100 28,800 1,500,000 0 22,700 3

Silver. To!al 67 33 11 1,600 3{10,000 0 1,600 1 Zinc, Tolal 67 67 13300 4,020,000 23,000,000 0 121,000 14

Note: 1 ~ Concentrations are micrograms per kilogram (!Jglkg) fer all parameters.

Ecological SL -PEC (Jig/kg)

NA NA

NA

NA NA 845

1 050 1,450

NA NA

1,290 2,230

536 561

1,170 1,52.0

22800 NA NA NA

149,000 128,000

1,060 48,600

NA 469,000

2~ ValUes exceeding the lluman hea'lth (residential so~) screening levelS are oold'underiined. Values in pare rubes~ highlighled with the asterisk "( 1 0)-'" ind'icale to4al number o samples for a partioular compolJnd thai exceed the indus1rial soil screening criterta. If no value is listed, then al results were below the appl[cable cri .eria.. 3~ For Ecologi~ evalUation. PAHs are screened agains! the Total PAH criteria based on 111e sum of 13 PAHs (lhe three not incll.lded are bli~ed).

Individual PAHs are niX screen~ agai nst their respective TEC and PEC criteria. The screening values for individual PAHs are provided for inforrnal!ional purposes only. Reter to Table 17. 4~ "TEC" is the Threshold Effects Concentration and 'PEC" is the Probable Effects Concentration.

5) [Jglkg = microgram per kilogram. 6~ SL = Screening t evel 7} MDL = Method D&ection Lima

Samples Exceeding the

PEC

0 0

0

0 0 2 2 1 0 0 2 3 1 6 4 3 1 0 0 0

2 3 0 0

0 2

Soil Vapor

• 2009 (soil gas only) and 2012 (2 rd. w/sub-slab) • 2012 data compared to EPA RSLs

Industrial SLs exceeded at Akzo, COW, and WPD maintenance bldg. areas

Detected primarily chlorinated VOCs (TCE and chloroform), naphthalene, and benzene

Tab~e 25. Soil v·apor Summary Statis~ics,

North Shore Gas -Former Waukegan South f lalilt Manufactured Gas Plant s·ite 2 North Pershing Road & 1 South PerShing Ror.~d, WaukeganJ Illinois US EPA [LD984B09~28 11rlinois. BPA #097190 DO~B

Samples. Samples Mi'nimum Maocimum

Parameter bJglm i E.xtedililg Analyzed (IJgfmi (p~m~ 11ile MDL

Benzene 76 Q 1.1 2.400 Ethylbenmne 76 2S 2.1 14(]JJOO Xylenesl T atal 76 36 5 400.000 1.2,4-T rim~hylbenzene 76 14 1.7 10,000 Naph.tha[ene 76 3Q 0.47 5. ~ ao

B:romodlotitorame:.han£! 76 3 5.5 1Q Ctmrofomn 76 14 2.4 6.00 T~etrach.[oroellien£ 76 45 2.8 1.Bt!ID T rrml· oethene 76 3 2.3 45 Vinli Ch1cride 76 1 1411 \140

Notes:

1} ~ . 3 = microg am per cubic meter 2} SL = Saeeni Lev~

3} r. DL = Mehd tecti li .

lmlustri'al ShaUow Sampl~ Exceeding

VaporSL fpglm~ lhild. SihaiiDw 'Vapor SL

16 5 4Q e

44011 3 3111 1 3.6 Q

3 .. 3 3

5.3 ~ 2

4711 1 311 3 28 1

Surface Water

• Samples taken in 2011 (1A, 2A, T3C, 4A, and 5A)

• BaP and lead detected just above eco SL at 2 locations

• In general, very low conc. for detected compounds

T1A

T2A T5A

T4A

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Note: SW data screened against tapwater RSLs – exceedances of BaP , dibenzo(a,h) antharacene, and arsenic

Table 23_ Lak e Mi'chi g>an Surtace wa·te.:- R esl!dts N orih $ 1l.o r& GIHI - Fo!TTI.&l' Wa1.11lulgan S;ou:lh Plant Manuracfured Gaa Pla:nrt $It& 2 Norln Peral'll mg Road & ., .soo11'1 P&ral'll!ng Road~ WaU:Iulgam. 1 In Ola U S EPA II!..J!J):.IW800228 111 ool';a EPA 111!0071'9()0()56

V013'1111& o r gamle compounds ( IJglliJ

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IL R&<a- Water SIL. 5 ·:roo 1DC" 1 DC•JD 1:5 B7 [ L E eollog le SIL. IN>S IN>S l'ol5 l'oiS NS IN>S

T 1A 1017/25.f1 1 <LA1 <154 4157 <2:.5 -cC...S :i' <n..B3

T'2A 1017t.26N 1 ·-<0..41 ·<154 <057 <:!:.6 ..q:'L57 <li..S3

TSC 1017/28.f11 ·-<OA1 ·<IJS4. <0!.67 <:!_5 <0..5 7 <n..B3

T4A 1017/25.f1 1 ·-<0..41 ·<as4 4157 <:!:.6 -<1...57 ·<n..B3

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T 1A 07.r.25.f11 <C! 0045i <l.DI!EE ·-<0..0057 O _C•J6 0..007<!1 0 .0 1 2 II).C•J8-3 0..0 11 0 J0 1 5 c:C.111:1.3:! iT'2A 0712611 1 IJ..OIJ46 <l.IIII!EE ·~57 ·<aa!3S 41.a::J29 l).l[l•J39 <1004a ·<U!Oo'l4 0 .001":5 -cO .~

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T4A IJ7.r.25.f1 1 -<C .~c: <l.DI!EE ·-<0..0057 ·<aal36 0..0041 K!LI[l•J69 0 .01!«5 D .Dilo7 9 0 .0067 <O.D:a.:! T5A IJ71281"11 1).02:2 <J.IJ[J3'.; 0 .01)7 9 IJ..O 1 5 DL01'6 0 .023 0 .0 1 9 IJ..02.S Gu!K!9 C!.C•J5

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280 240 I(I(A-3 140 2 1 00 2 1 0 1_9 1 9 4.,3 1 13 ::u; 0.3

0 .03.:1 <l.004a D .DG68 <11...043' <1:!! !1081 0 .0 18 0 .0 19 -<L004a -<ai!D-<7 ·~7 <IUDB1 [J_I[l•J75

O.IJ~ GIJCIW6 o..a 1 e. ·~ 1).[)27 IJ.DSJ 0 .0 1 :5 <1004a <lLIIG-"'7 ·<LD43' <1:! . !1081 IJ..I[l•J84 IJ..07 D . IJ 1 1 IJ..O 1-5 ·<11...043' D\.11<25 0 .048

! l § i 1'-

i '"" 1-... cS

i 2: --w N

5IJ 50 :50[)1)

5 Q_1 2 120 <!l.4 -<I.Do99 5 .7 <!].4 ..a.ma 5 .5 <!].4 <11!£9 1 9 _7 <!l.4 <l.Do99 8 .2 <!].4 <l.l!o99 1 4

Table 4. Human health screening results: Constituents exceeding criteria

Former South Plant MGP Site

Waukegan, Illinois

Baseline Risk Assessment (Revision 1)

Residential IndustrialSurface Soil (0–2 ft)

NSGSP No data No dataWPD No data No dataAKZO 7 cPAHs, benzene,a ethylbenzene, xylene, antimony, arsenic, (leadb) 4 cPAHs, benzene,a ethylbenzene, xylene, arsenic, (leadb)COW 5 cPAHs Benzo[a]pyrene

Total Soil (0–10 ft)

NSGSP 8 cPAHs, benzene, ethylbenzene, 1,2,4-trimethylbenzene, xylene, arsenic

8 cPAHs, benzene, ethylbenzene, xylene, arsenic

WPD 6 cPAHs 3 cPAHsAKZO 8 cPAHs, 2-methylnaphthalene, benzene,a ethylbenzene, xylene,

antimony, arsenic, iron, (leadb)6 cPAHs, benzene,a ethylbenzene, xylene, arsenic, (leadb)

COW 6 cPAHs 3 cPAHs

Soil Vapor: All Samples, Both Outside and Underneath Building

NSGSP No exceedances No exceedancesWPD Naphthalene, benzene, ethylbenzene, bromodichloromethane,

chloroform, trichloroethene, 1,2,4-trimethylbenzeneNaphthalene, benzene, bromodichloromethane, chloroform

AKZO Naphthalene, benzene, ethylbenzene, toluene, xylene, bromodichloromethane, carbon tetrachloride, chloroform,

tetrachloroethene, 1,1,1-trichloroethane, trichloroethene, 1,2,4-trimethylbenzene, vinyl chloride

Naphthalene, benzene, ethylbenzene, xylene, bromodichloromethane, chloroform, tetrachloroethene, trichloroethene, 1,2,4-trimethylbenzene, vinyl chloride

COW Naphthalene, chloroform, ethylbenzene Chloroform, ethylbenzene

Soil Vapor: Sub-slab Samples Under Buildingc

NSGSP No data No dataWPD Naphthalene, benzene, ethylbenzene, bromodichloromethane,

chloroform, 1,2,4-trimethylbenzeneNaphthalene, benzene, bromodichloromethane, chloroform

AKZO Naphthalene, ethylbenzene, bromodichloromethane, carbon tetrachloride, chloroform, tetrachloroethene, 1,1,1-trichloroethane,

trichloroethene

Naphthalene, ethylbenzene, bromodichloromethane, chloroform, trichloroethene

COW No data No data

Sediments

Marina (<2 ft) 3 cPAHs No exceedancesBeach (<4 ft) 5 cPAHs Benzo[a]pyreneLake (<2 ft) 5 cPAHs Benzo[a]pyrene, dibenz[a,h]anthracene

Surface Water Benzo[a]pyrene, dibenz[a,h]anthracene, arsenic --

Groundwater

NSGSP 17 PAHs, dibenzofuran, BTEX, styrene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, arsenic, chromium, cobalt, iron, manganese, nickel,

thallium, vanadium

--

WPD 16 PAHs, BTEX, styrene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, arsenic

--

AKZO 16 PAHs, 2,4-dimethylphenol, BTEX, methylene chloride, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, vinyl chloride, arsenic

--

COW 8 cPAHs, benzene, ethylbenzene, 1,2,4-trimethylbenzene, arsenic, iron, manganese

--

Notes: This table lists chemicals that exceeded screening criteria developed using a target cancer risk of 1×10–6 or a noncancer hazard quotient of 1, along with default residential and industrial scenario assumptions.

Some additional cPAHs were retained as COPCs because of the method used for deriving toxicity values. See text for details.

-- - not applicableBTEX - benzene, toluene, ethylbenzene, and total xylenescPAH - carcinogenic polynuclear aromatic hydrocarbonCOPC - constituent of potential concernPAH - polynuclear aromatic hydrocarbon

a Some non-detect results for benzene exceeded the criterion in areas impacted by other petroleum components.b Although maximum value for lead exceeded criterion, the average value did not.c Includes only the samples taken immediately below the building (i.e., sub-slab) and excludes any deeper samples.

Appendix O – Page 117 of 301



Waukegan, Illinois









COW 6 cPAHs 3 cPAHs












trichloroethene


COW No data No data

Sediments



Groundwater


thallium, vanadium

--


--


--


--








Waukegan, Illinois









COW 6 cPAHs 3 cPAHs












trichloroethene


COW No data No data

Sediments



Groundwater


thallium, vanadium

--


--


--


--






S:OCOODARY l.tBJIII EXPOSu"J.I

~UVACE!IOIL

!;U5SU=tfACE SOrL

5\JRf ACE WATER

LEGEND: o Pathway potentially complete and warrants rurther evwation within the Baseline Risk

Assessmenl. The level of evaluation oMJI be dependent on sile oonclitions. o Pathway not complete or oonsidered insignificant No further evaklation is

recommended. NA: Not Applicable NAPL: Nonaqueous-phase liquid

a This pathway ind udes vapor intrusion into indoor air from subsurface sources.

b This pathway ind udes 1he po~ential migration ol soil vap«S into exc:avalions created as part of oonstruction activilies, c This pa:hway refers to root uptake.

llDUTI!

JfU)L"-'I l!.ECEPTO!\S ! COlOGIC,U l!.EC'!PTO!\S

CO~!M!ItCU!. CO!iSTl!.UCTION :&lCl!.EATION.U lHIDENTLU mDUST&H lJ I I I 100~ 100~

BIKDS I I I s~c I M."-'-L\!.US n5!:1 DI\'UT<BllUES Pl .. "-""TS

Flgut't' SITE-SPECITIC COI"CEPTUAL SITE MODEL Drawn By: RK 1 FORMER SOUTH PLA .. NT MGP SITE

Rtlision WAUKEGAN, ILLINOIS Checked By: MWK 1 BASELINE RISK ASSESSMENT

Date Appro\'ed By: BA

12131/2013 NORTHSHOREGASCO~~ANY

AWE<!IIX 0 - Page 102 ct 301

HH Risk Assessment

• Human Health Receptors/Exposure Pathways

Construction/Industrial/Commercial Workers Incidental ingestion/Dermal contact/Inhalation (incl. VI) of soil and

gw

Recreational Visitors Incidental ingestion of surface water and sediment Dermal contact with surface water and sediment

Residents (future use scenario) Incidental soil ingestion/Dermal contact/Inhalation (incl. VI)

HH Risk Assessment – Cont’d HHRA Conclusions & Comparison to Risk Management Range (10-6 to 10-4): • SW & sediment – below • GW (Potable Use; all areas) – exceeds • NAPL in subsurface soil, GW, soil vapor - exceeds for construction worker

exposure • Soil (Residential) – exceeds at Akzo & NSGSP • Soil (Industrial) – exceeds at Akzo & NSGSP • Vapor Intrusion (Industrial) - Akzo: may exceed at eastern ½ of building

where subslab sampling not performed • Vapor Intrusion (Residential) – Akzo & WPD maintenance bldg. exceeds

Eco Risk Assessment

• Screening level ERA performed • Focused on adjacent beach and open water south

of Akzo property and harbor area • Media of concern – SW and sediment • Potential receptors

Beach/open water: aquatic mammals, birds, fish, benthic invertebrates, and plants

Waukegan Harbor: fish & benthic invertebrates

Table 49. Sed'ilnent ecological benchmar1< hierarchy and selected screening values IFollller South Plant MGP Site Waukegan, Ill inois Baseline Riisk Assessment (Revision 1)

Screening Criteria

Anatyte Units YIN SolllfCe Value PVOCs

Benzene ~ Yes EQP-SQG 308 Ethytbenz:ene ~ Yes EQP-SQG 459 Toluene ~ Yes EQP-SQG 383 Xytene isornern (total) ~ Yes EQP-SQG 465 1,3,5-T rirneth)l{benzene ~ No NA 1,2,4-T rirneth)l{benzene ~kg No NA

Sernivolatille Organic Compounds PAHs

Total PAHs ~g Yes TEC 1610 Acen~hthene ~ Yes EQP-SQG 396 Acen~hthylene ~ Yes EOP-SQG 365 Anthracene ~ Yes TEC 57.2 Benz[ a]anttuacene ~kg Yes TEC 108 Benzo{b}fluoranthene ~g Yes EQP-SQG 788 Benzo{k]fluoran1hene ~.kg Yes EQP-SQG 791 Benzo{alpyrene ~kg Yes TEC 15(1

Benzo[gtli}pefytene ~g Yes EQP-SQG 882 Chrysene ~ Yes TEC 166 Diben~a,h )anthracene ~.kg Yes TEC 33

Ftooranthene ~.kg Yes TEC 423 Ftooreoe ~ Yes TEC 77.4

1 ooeno[ 1,2,3-cd]pyrene ~ Yes EQP-SQG 899 Naphthalene ~ Yes TEC 176 Phellanthrene ~g Yes TEC 204 Pyrene ~g Yes TEC 195

2-Methylnaphtha!ene ~g Yes EQP-SQG 36(1 Phenols

2,4-0imetllylphendl ~g No NA 2-MethWtJenol ~ No NA 4-MethWtJenol ~ No NA Pheoo1 ~ No NA

_---:.;.;M;:;.;acOooa'l=-=~=d:....;:e;.:..t al= ·:....;:200= 0;;....__ DtToroiMcGrafh 2000 Coosensus-

TEC Col'lSensusBased

Threshold B fed

bared Probable

Effect Concentrations Concentration

1610 22800

572 845 108 1050

15£1 1450

166 1200 33 423 2230 77.4 536

176 561 204 1170 195 1520

EOP-SQG Narcotic

Chemicals and PAH Criteria

308 459 383 465

396 365 479 Gn 700 791 m 682 679 904 570 434 899 311 480 562 360

Table 50. Summary of eco'logical screenin g evaluati on Fonner South Plant MGP Site Waukegan, !Illinois Baseline Risk Asse-ssment (Revision 1)

Sediments Beach (<2

Beach (>2 fi)

Lake (<2ft)

Lake (>2 ft)

Marina (All deptlhsl Surface Water

AI samples

COPC (Number of samples above screenmg criterion)

Copper (4 ), lead (3). nickel (1 }. zinc (6}

To:al 13.-PAH (11 ). be~ene (1 ), ethylbenzene (3), total xylenes (3 }. oopp.er (5), lead (3), mercury ( 1}. zinc (4 }

Tolal 13-PAH (3). oopper ( '1), lead (1 ), zinc (3)

Totai 13-PAH (7) , e hyt:benzene (2). xylenes (2). lead (4 ). nickel (2). zinc ( 1)

Tolal 13-PAHs

Benzo[ a]pyrene (2). lead ( 1 }

Comments Concerning Excee<lances

Niok.el was above its TEC, bu below its PEC. Copper (2), lead ( 1 ). and zinc (2) exceedances were above their PEC.

Total '13-PAHs i;n only one samplE was above lhe f'EC (i .e ., sample BCH-:5_137-223), me~ls exceedances were an below their PEC. There is no T EC and PEC for benzene. ethyl benzene. or to:al xy lenes (see text for explanation). The number of samples exceeding the screening criteria for benzene, ethylbenzene, and total xylenes represent ex:ceedances of EQPSQG values.

Sample(s) were above the T'EC. but be low the PEC.

Exceedances oftota113-PAHs. nickel, and zinc were above he TEC. blJit below the PEC. Lead was below its P EC in two samples and above iiS PEC in two samples. There is no TEC or PEC foc ethylbenzene or lotal xy!Enes (see text for expl.anation). The num'ber of samples exceeding the screen ing ail.eria for ethyl benzene and total xylenes represenl. exceedances of EQPSQG values.

One sample was sl ightly above the TEC. but below the PEC.

T he maximum ccmce11lratio:n of each anal~ was only sl ightly above iiS SCTeening criteria (i.e .• less than 2-folcl factor}. The aver~e ooncentrat ion of each anallyte was below its screening level.

Notes: This tablE lists C!hemical:s that exceed~ ecological screening criteria in each medium. The number of sam ples exceeding the screening ai .ericm is provided in p.arentheses.

The oomme111s section f:s used to describe the magnitudE of t he exceedances to put them in~o a be~er perspeclive.

Refer to TablEs 5 1 through 56 foc detailed resu Its of th:e eool.ogicai screening ev alu aticm .

COPC - constituent o potelllial ooncem based ~on eoological screen i;ng evaluatiol\ EQP-SQG - equi librium partitioning model (EQP) - sediment quality guidel'ines (SQG) (DiToro and McGrath 2000) P AH - polycyclic aromatic hydrocarbol\ PEC - consensu s~based, probable-effect concentration (MacDanald et at 2!JOCI} TEC - consensus-lbased, thresholdl-effect concenlraticm (MacDonal d e al. 2000)

Eco Risk Assessment Conclusions • Aquatic receptors feeding on benthic invertebrates not at

risk to levels of COPCs found in SW and sediments • Upland portion does not support habitat for eco receptors • Harbor sediments don’t pose eco concern/able to support

healthy benthic community • Beach sediments contain metals potentially posing risk to

sensitive receptors (not MGP-related, however)

Media of Concern • Soil: Areas of concern for industrial site users located on former MGP

property beneath Pershing Rd. and Akzo property

• Groundwater: Groundwater impacts include both dissolved and phase separated (NAPL) impacts. DNAPL is located beneath all areas except COW, while LNAPL is present in all areas

• Soil Vapor: Unacceptable HH risks from COPCs in the WPD maintenance building and NE corner of main Akzo manufacturing building

Remedial Action Objectives (RAOs) • Prevent construction worker exposure to soil containing MGP-related

contaminants that present risks> 10-4 ELCR and HQ>1; • Prevent residential & industrial worker exposure to surface soil and total soil,

including dermal contact, ingestion, and inhalation (due to VI), to MGP-related contaminants that present risks > 10-4 ELCR and HQ>1;

• Restore GW to meet cleanup goals for MGP-related contaminants within reasonable time

• Reduce potential for contaminated GW to migrate to surface water at levels above surface water criteria for protection of human health and ecological receptors

• Reduce potential for migration of NAPL to surface water and sediment in the lake

State Perspective

• Long history/involvement with site (since 1990s)

• Overseen previous response action (2003-2004)

• Expected to play active role in future cleanup

Community Perspective

• Environmental Justice area • Knowledgeable • Updated periodically via CAG meetings • Likely to comment on proposed cleanup

plan

PRP Perspective

• Cooperative • Likely to support proposed cleanup plan • Good relations with adjacent property owners

Site Team

Ross del Rosario – RPM Peter Felitti - ORC David Klatt – CH2M Hill (EPA Contractor) Doyle Wilson - IEPA