### HRS DOCUMENTATION RECORD--REVIEW COVER SHEET

Name of Site: Eighteenmile Creek

Date Prepared: September 2011

Contact Person:

Documentation Record: Ildefonso Acosta

U.S. Environmental Protection Agency New York, NY

Pathways, Components, or Threats Not Scored

Surface Water: The Surface Water Migration Pathway Drinki ng Water Threat was not scored. Water from Eighteenmile Creek is not used for drinking water purposes [Ref. 43, p. 1]. The Human Food Chain and Environmental Threats produce an overall score above the minimum required for the site to qualify for the National Priorities List.

Ground Water: The Ground Water Migration Pathway is not scored because there is not sufficient documentation to score the Ground Water Pathway, nor would the pathway contri bute significantly to the site score based on the available

data.

Soil Exposure: Although the proposed site consists of a cont aminated sediment plume, there are numerous residential properties along the banks of Eighteenmile Creek. Du ring flooding events, the contaminated sediment from Eighteenmile Creek might have contributed to soil contamina tion. However, soil contamination was not considered in scoring the site at this time because there is not sufficien t documentation to score the Soil Exposure Pathway; regardless, the pathway score based on the available data would not affect the listing decision.

Air: No samples were collected to characterize the Air Migration Pathway; there is no documentation of an observed release or of potential contamination. The Air Migrati on Pathway would not contribute to the site score based on

available data.

The Ground Water, Soil Exposure, and Air Pathways might be evaluated further during future investigations because evaluation of those pathways might lead to identificati on of contributing sources of sediment contamination.

### This page has been left blank intentionally.

### HRS DOCUMENTATION RECORD

Name of Site: Eighteenmile Creek Date Prepared: September 2011

EPA ID No.: NYN000206456

EPA Region: 2

Street Address of Site*: 198-300 Mill Street, Lockport, NY 14094

County and State: Niagara County, New York

General Location in the State: Western New York State; Southern side of Lake Ontario

Topographic Map: Lockport, NY and Newfane, NY

Latitude*: 43 ° 10 ′ 52.68” North Longitude*: 78 ° 41 ′ 22.36 ′′ West

Site Reference Point: Eighteenmile Creek just sout h of its intersection with William Street (midway

between 198 and 300 Mill Street), Lockport, New York

[Ref. 3, p. 1; 4, p. 1, 2; 5, p. 1; 10, p. 1]

* The street address, coordinates, and contaminant lo cations presented in this Hazard Ranking System (HRS) documentation record identify the general area where the site originates. They represent one or more locations EPA considers to be part of the site based on the screening info rmation EPA used to evaluate the site for NPL listing. EPA lists national priorities among the known "releases or threatened releases" of hazardous substances; thus, the focus is on the release, not precisely delineated boundaries. A site is defined as where a hazardous substance has been "deposited, stored, placed, or otherwise come to be located." Generally , HRS scoring and the subsequent listing of a release merely represent the initial determination that a certain area may need to be addressed under CERCLA. Accordingly, EPA contemplates that the preliminary description of facility boundaries at the time of scoring will be refined as more information is developed as to where the contamination has come to be located.

Scores

Ground Water Pathway Surface Water Pathway Soil Exposure Pathway Air Pathway Not Scored

100.00

Not Scored

Not Scored

HRS SITE SCORE 50.00

1

### WORKSHEET FOR COMPUTING HRS SITE SCORE

EIGHTEENMILE CREEK

S S 2



### 1. Ground Water Migration Pathway Score (S gw 

### ) (from Table 3-1, line 13) Not Scored

2a. Surface Water Overland/Flood Migration Component (from Table 4-1, line 30) 100.00 10,000

2b. Ground Water to Surface Water Migration Component (from Table 4-25, line 28) Not Scored

2c. Surface Water Migration Pathway Score (S

sw 

### ) Enter the larger of lines 2a and 2b as the pathway score. 100.00 10,000

3. Soil Exposure Pathway Score (S

s 

### ) (from Table 5-1, line 22) Not Scored

4. Air Migration Pathway Score (S

a 

### ) (from Table 6-1, line 12) Not Scored

5. Total of S gw 2 

### + S

sw 2 

### + S

s 2 

### + S

a 2 

### 10,000

6. HRS Site Score Divide the value on line 5 by 4 and take the square root 50.00

2

### SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORESHEET

EIGHTEENMILE CREEK

SURFACE WATER OVERLAND/FLOOD

MIGRATION COMPONENT Factor Categories & Factors

DRINKING WATER THREAT MAXIMUM

VALUE VALUE

ASSIGNED

Likelihood of Release

1. Observed Release 550 550 2. Potential to Release by Overland Flow

2a. Containment 10 not scored

2b. Runoff 25 not scored

2c. Distance to Surface Water 25 not scored 2d. Potential to Release by Overland Flow 500 not scored (lines 2a [2b + 2c]) 3. Potential to Release by Flood 3a. Containment (Flood) 10 not scored 3b. Flood Frequency 50 not scored 3c. Potential to Release by Flood 500 not scored (lines 3a x 3b) 4. Potential to Release (lines 2d + 3c) 500 not scored

5. Likelihood of Release (higher of lines 1 and 4) 550 550

Waste Characteristics

6. Toxicity/Persistence 7. Hazardous Waste Quantity

8. Waste Characteristics *

*

100 not scored

not scored

not scored

Targets

9. Nearest Intake 50 not scored 10. Population

10a. Level I Concentrations ** not scored

10b. Level II Concentrations ** not scored

10c. Potential Contamination ** not scored 10d. Population (lines 10a + 10b + 10c) ** not scored

11. Resources 5 not scored

12. Targets (lines 9 + 10d + 11) ** not scored

13. DRINKING WATER THREAT SCORE ([lines 5 x 8 x 12]/82,500) 100 not scored

* Maximum value applies to waste characteristics category. ** Maximum value not applicable

3

### SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORESHEET

EIGHTEENMILE CREEK

SURFACE WATER OVERLAND/FLOOD

MIGRATION COMPONENT Factor Categories & Factors

HUMAN FOOD CHAIN THREAT MAXIMUM

VALUE VALUE

ASSIGNED

Likelihood of Release

14. Likelihood of Release (same as line 5) 550 550

Waste Characteristics

15. Toxicity/Persistence/Bioaccumulation 16. Hazardous Waste Quantity

17. Waste Characteristics *

*

1,000 5.00E+08

100

320

Targets

18. Food Chain Individual 19. Population

19a. Level I Concentrations

19b. Level II Concentrations

19c. Potential Human Food Chain Contamination 19d. Population (lines 19a + 19b + 19c)

20. Targets (lines 18 + 19d) 50

**

**

**

**

** 45

0

0.03

0.003

0.033

45.033

21. HUMAN FOOD CHAIN THREAT SCORE ([lines 14 x 17 x 20]/82,500) 100 96.07

* Maximum value applies to waste characteristics category. ** Maximum value not applicable

4

### SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORESHEET

EIGHTEENMILE CREEK

SURFACE WATER OVERLAND/FLOOD

MIGRATION COMPONENT Factor Categories & Factors

ENVIRONMENTAL THREAT MAXIMUM

VALUE VALUE

ASSIGNED

Likelihood of Release

22. Likelihood of Release (same as line 5) 550 550

Waste Characteristics

23. Ecosystem Toxicity/Persistence/Bioaccumulation 24. Hazardous Waste Quantity

25. Waste Characteristics *

*

1,000 5.00E+08

100

320

Targets

26. Sensitive Environments

26a. Level I Concentrations

26b. Level II Concentrations

26c. Potential Contamination 26d. Sensitive Environments (lines 26a + 26b + 26c)

27. Targets (line 26d) **

**

**

**

** 0

100

not scored

100

100

28. ENVIRONMENTAL THREAT SCORE ([lines 22 x 25 x 27]/82,500) 60 60.00

29. WATERSHED SCORE (lines 13 + 21 + 28) 100 100.00

30. SURFACE WATER OVERLAND/FLOOD
MIGRATION COMPONENT SCORE (S of 

### ) 100 100.00

SURFACE WATER MIGRATION PATHWAY SCORE (S

sw 

### ) 100 100.00

* Maximum value applies to waste characteristics category. ** Maximum value not applicable

5

### REFERENCES

Reference

Number Description of the Reference

1. U.S. Environmental Protection Agency (EPA). Hazard Ranking System, Final Rule . Federal Register, Volume 55, No. 241, pp. 51532-51667. December 14, 1990. [138 pages]

2. EPA. Superfund Chemical Data Matrix, SCDM Data Version: 1/28/2004, Appendices B-I (Hazardous Substances Factor Values), B-II (Hazar dous Substance Benchmarks) (excerpts) . Downloaded from http://www.epa.gov/superfund/site s/npl/hrsres/tools/scdm.htm on April 6, 2009. [9 pages]

3. EPA. Superfund Information Systems, CERCLIS Database, Eighteenmile Creek: Site Information

. Downloaded from http://cumulis.epa.gov/supercpa d/cursites/csitinfo.cfm?id=0206456 on July 5, 2011. [1 page]

4. U.S. Department of the Interior Geological Survey (USGS). Lockport Quadrangle, New York, 7.5-Minute Series (Topographic) . 1980; and Newfane Quadrangle, New York, 7.5-Minute Series Topographic) . 1978. [2 maps]

5. New York State Department of Environmental Conservation Region 9 Division of Environmental

Remediation. Remedial Investigation Report Eighteenmile Creek Corridor . September 2006. [243 pages]

6. Ecology and Environment, Inc. Eighteenmile Creek State of the Basin Report . Prepared for U.S. Army Corps of Engineers and Niagara County Soil and Wa ter Conservation District. December 2007. [216 pages]

7. Ecology and Environment Engineering, P.C. Final Supplemental Remedial Investigation Report for the Eighteenmile Creek Corridor Site . Prepared for New York State Department of Environmental Conservation. July 2009. [624 pages]

8. Ecology and Environment Engineering, P.C. Fi nal Additional Investigation Addendum to the Supplemental Remedial Investigation Report for the Eighteenmile Creek Corridor Site . Prepared for New York State Department of Environmental Conservation. July 2009. [170 pages]

9. CH2M Hill, Ecology and Environment, Inc., Envir onmental Design International, Inc., and Teska Associates, Inc. Data Summary Report Site Charact erization of the Eighteenmile Creek Area of Concern

. Prepared for U.S. Environmental Protec tion Agency. March 2011. [6,894 pages]

10. Google Earth. Site Reference Point (Eighteenmile Cr eek Just South of Intersection with William Street) Latitude and Longitude . 2011. [1 page]

11. USEPA Contract Laboratory Program. Modi fications Updating SOM01.1 to SOM01.2 . Date Amended: April 11, 2007. [129 pages]

12. Capriglione, Michele, Weston Solutions, Inc. Project Note to Eighteenmile Creek HRS Site File, Subject: Type of surface water body determination for Eighteenmile Creek . July 5, 2011. [7 pages]

6

### REFERENCES (continued)

Reference

Number Description of the Reference

13. Galloway, Marcia, and Bryan Kroon, Ecology and Envir onment, Inc. E-mail co rrespondence with Michele Capriglione, et al., Subject: Eighteenmile Creek Samp le List From Data Summary Report, March 2011; with attached analytical data package pdf files and pdf files posted to the FTP site . May 20, 21, and 24, 2011. [483 pages]

14. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-3972,A07-3979; STL Project#: NY5A9393.3; SDG#: A73972; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 15, 2007. [1,814 pages]

15. Bogolin, Anthony, STL Buffalo. Analytical Re port Job#: A07-3976,A07-4048,A07-4052; STL Project#: NY5A9393.3; SDG#: A73976; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 15, 2007. [2,272 pages]

16. Bogolin, Anthony, STL Buffalo. Analytical Re port Job#: A07-4049,A07-4053,A07-4121; STL Project#: NY5A9393.3; SDG#: A74049; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 15, 2007. [2,301 pages]

17. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4119,A07-4120,A07-4125,A07-4126; STL Project#: NY5A9393.3; SDG#: A74119; Site Name: Ecology and Environment NYSDEC Standby; Task:

18 Mile Creek Site-002699.ID19.02 . May 15, 2007. [2,161 pages]

18. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4182,A07-4187; STL Project#: NY5A9393.3; SDG#: A74182; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 21, 2007. [1,968 pages]

19. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4183,A07-4188; STL Project#: NY5A9393.3; SDG#: A74183; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 21, 2007. [2,009 pages]

20. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4235,A07-4237; STL Project#: NY5A9393.3; SDG#: A74235; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 21, 2007. [2,128 pages]

21. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4236,A07-4238; STL Project#: NY5A9393.3; SDG#: A74236; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 24, 2007. [2,148 pages]

22. Bogolin, Anthony, STL Buffalo. Analytical Report Job#: A07-4304,A07-4305; STL Project#: NY5A9393.3; SDG#: A74304; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 24, 2007. [2,027 pages]

23. Daniels, Anthony, Weston Solutions, Inc. Documentation of Communication between Sue Donaldson and Guy Boos of Les Allen Bait and Tackle, Subject: Docu mentation of Fish Caught for Consumption at Burt

Dam/Fisherman’s Park . June 3, 2011. [1 page]

7

### REFERENCES (continued)

Reference

Number Description of the Reference

24. Capriglione, Michele, Weston Solutions, Inc. Project Note to Eighteenmile Creek HRS Site File, Subject: Distance Calculations Using ArcGIS 10.0 (with attached site location map) . June 3, 2011. [3 pages]

25. Ecology and Environment. 18 Mile Creek Logbook, Job Number 002699.ID19.02 . April 16, 2007 – June 12, 2007. [49 pages]

26. Bogolin, Anthony, STL Buffalo. Analytical Re port Job#: A07-4304,A07-4319,A07-4455; STL Project#: NY5A9393.3; SDG#: A74303; Site Name: Ecology a nd Environment NYSDEC Standby; Task: 18 Mile

Creek Site-002699.ID19.02 . May 23, 2007. [2,697 pages]

27. EPA. Using Qualified Data to Document an Observed Release and Observed Contamination . November 1996. [18 pages]

28. Weston Solutions, Inc. Region 5 Superfund Technical Assessment and Response Team. Site Logbook No. 1400-4E-ANSF with attached photo documentation log . June 2011. [33 pages]

29. EPA. Basic Information, Polychlorinated Biphenyls (PCBs). Downloaded from http://www.epa.gov/waste/hazard/tsd/pcbs/pubs/about.htm . Downloaded on July 13, 2009. [2 pages]

30. Capriglione, Michele, Weston Solutions, Inc. Project Note to Eighteenmile Creek HRS Site File, Subject: Data Validation Qualifier Information, with att achments from EPA Region 2, EPA Great Lakes National Program Office, and Ecology and Environment, Inc. July 7, 2011. [46 pages]

31. Weston Solutions, Inc. 15-Mile Surface Water Pathwa y Map, Eighteenmile Creek HRS, Niagara County,

NY . July 6, 2011. [1 map]

32. Schmidl, Joseph, Weston Solutions, Inc. Project Note to the Eighteenmile Creek HRS Site File, Subject: Wetland Categories and Frontage to Eighteenmile Creek, Niagara County, New York . June 27, 2011. [9 pages]

33. Environmental Data Resources (EDR). The EDR Radius Map Report with GeoCheck, Eighteenmile Creek, Inquiry Number: 3111131.2s . June 30, 2011. [1,387 pages]

34. Wikipedia, the free encyclopedia. Particle size (grain size) Downloaded from http://en.wikipedia.org/wiki/Particle_size_(grain_size) . Downloaded on July 18, 2011. [2 pages]

35. Capriglione, Michele, Weston Solutions, Inc. Documentation of Communication between Gerry Sweeney of Town of Newfane Marina, Subject: Fishing for Consumption in the Town of Newfane, NY . April 7, 2011. [1 page]

36. New York State Department of Health. Chemicals in Sportfish and Game, Health Advisories . 2010-1011. [39 pages]

8

### REFERENCES (continued)

Reference

Number Description of the Reference

37. Capriglione, Michele, Weston Solutions, Inc. Project Note to Eighteenmile Creek HRS Site File, Subject: Determination of Eighteenmile Creek as Significant Co astal Fish and Wildlife Habitat, with attachments from the New York State Department of State and New York State Department of Environmental

Conservation . July 19, 2011. [6 pages]

38. Capriglione, Michele, Weston Solutions, Inc. Project Note to Eighteenmile Creek HRS Site File, Subject: Calculation of Sample Quantitation Limits (SQLs) . July 21, 2011. [5 pages]

39. EPA. Aroclor and Other PCB Mixtures, Polychlori nated Biphenyls (PCBs), Wastes, USEPA. Downloaded

from: http://www/epa.gov/epawaste/hazard/tsd/pcbs/pubs/aroclor.htm . Downloaded on July 22, 2011. [2 pages]

40. New York State Department of Environmental Conservation Division of Environmental Remediation.

Environmental Restoration Record of Decision Former Flintkote Plant Site City of Lockport, Niagara County, New York, Site Number B-00161-9 . March 2006. [53 pages]

41. New York State Department of Environmental Conservation Region 9 Division of Environmental

Remediation. Site Investigation Report Former F lintkote Plant Site, 198 and 300 Mill Street, City of Lockport, Niagara County, New York . September 2000. [130 pages]

42. New York State Department of Environmental Conservation Division of Environmental Remediation. Record of Decision Eighteenmile Creek Corridor Site, Op erable Unit Nos. 1, 3, 4, 5 and 6, State Superfund Project, Lockport, Niagara County, New York, Site Number 932121 . March 2010. [79 pages]

43. Capriglione, Michele, Weston Solutions, Inc. Documentation of Communication between Victor DiGiacomo of Niagara County Soil and Water Conservation District, Subject: Determination of usage of Eighteenmile Creek . July 14, 2011. [1 page]

9

### SS-Site Summary

SITE SUMMARY

The Eighteenmile Creek site (CERCLIS ID No. NYN 000206456) in Niagara County, New York consists of contaminated sediments and water of Eighteenmile Creek a bove the contaminated sediments. The site as scored presently does not include the shoreline or areas beyond th e shoreline. The site location includes the geographic

coordinates of 43° 10 ′ 52.68” north latitude and 78° 41 ′ 22.36 ′′ west longitude [Ref. 4, p. 1; 10, p. 1]. The headwaters of Eighteenmile Creek originate southeast of Lockport in the Niagara County Park and Golf Course and flow aboveground to the west for approximately 1 mile, where they enter an underground pipe on the east side of Lockport [Ref. 7, p. 65; 28, pp. 6, 7, 21]. The creek then flows northwest under Lockport for approximately 3⁄4 mile, where it empties into a sluice located just southeast of the New York State Barge Ca nal (NYSBC) and just southwest of the Mill Street Bridge [Ref. 7, p. 65; 28, pp. 6, 19, 20]. Water from the NYSBC is discharged through the Hall Spillway and flows east into the sluice [Ref. 28, pp. 6, 19]. The headwaters of Eighteenm ile Creek and NYSBC waters combine in the sluice and flow through Culvert No. 125 under the NYSBC, exiting on the north side of the NYSBC and forming what is referred to as the East Branch of Eighteenmile Creek [Ref. 5, p. 69; 28, pp. 6, 13, 14, 19]. The East Branch associated with the headwaters of Eighteenmile Creek is not the same stream as East Branch, a tributary of Eighteenmile Creek entering the creek just south of Newfane, New York, approximately 4 mile s downstream of the headwaters [Ref. 4, p. 1]. The West Branch of Eighteenmile Creek originates in Upson Park at the dry dock on the north side of the NYSBC, and also receives water from two underground flows from the south and sout hwest [Ref. 5, p. 69; 28, pp. 5, 17, 18]. Waters from the East and West Branches converge on the south side of C linton Street and flow under Clinton Street to the Mill Pond (which is the result of Clinton Street Dam) [Ref. 5, p. 69, 182-184; 7, p. 24; 8, p. 68]. Eighteenmile Creek flows north for approximately 15 miles and discharges to Lake Ontario in Olcott, New York [Ref. 7, p. 24; 9, p. 13, 319]. The zone of contamination, defined by samples documenting an observed release (18MC-L03W-S01-Z1 through R2-001-V-Z3) extends for 12.71 miles [Ref. 7, p. 116; 9, p. 89; 13, pp. 16, 20; 15, pp. 49, 140; 24, pp. 1, 2].

Eighteenmile Creek has a long history of industrial use dating back to the 19 th 

### century. In Lockport, New York, where the creek originates, four industrial or former industrial facil ities (i.e., Former Flintkote Plant; Former United Paperboard Company; Upson Park; and Former White Transportation propert y), as well as the NYSBC, have been investigated [Ref. 5, p. 24; 7, p. 24; 9, p. 13]. This st retch of Eighteenmile Creek is referred to as the Eighteenmile Creek Corridor [Ref. 5,

p. 16]. There are several other industrial facilities and inactiv e hazardous waste sites located along or in the vicinity of Eighteenmile Creek [Ref. 9, p. 13]. Investigations have confirmed the presence of polychlorinated biphenyls (PCB), metals, and other contaminants throughout most of Eighteenm ile Creek, but specific sources of contamination have not been definitively identified [Ref. 42, pp. 8, 72]. Possible sources of contamination include: contaminant migration from hazardous waste sites or contaminated properties, industria l and municipal wastewater discharges, storm water and combined sewer overflow (CSO) discharges, as well as sour ces on the NYSBC [Ref. 6, pp. 102, 103; 9, pp. 13, 14]. The Burt and Newfane Dams, both located on Eighteenmile Cr eek downstream of the Eighteenmile Creek Corridor, may

serve as areas within the creek where contam inated sediments accumulate [Ref. 9, p. 13].

Sampling events have indicated that Eighteenmile Creek sediments are contaminated with a variety of pollutants, including the metals lead, zinc and copper; pesticide/insec ticides; PCBs; benzo(a)pyrene; dioxins; and furans. PCBs are the primary contaminants, with total PCB concentrations as high as 237 milligrams per kilogram (mg/kg) in sediment samples collected from Eighteenmile Creek [see Tables 1 and 2]. Although the highest PCB concentrations have been reported within the Eighteenmile Creek Corridor, sampling data indicate that the sediment contamination extends for

12.71 miles downstream, just south of Burt Dam [Ref. 24, pp. 1, 2].

Eighteenmile Creek and surrounding properties have been th e focus of numerous investigations by New York State Department of Environmental Conservation (NYSDEC) and EPA since the late 1980s. In Lockport, New York, where the creek originates, four industrial or former industrial facil ities (i.e., Former Flintkote Plant; Former United Paperboard Company; Upson Park; and Former White Transportation Propert y), as well as the NYSBC, have been investigated [Ref. 5; 7; 8]. The area encompassing these properties and the associated reach of Eighteenmile Creek (i.e., from NYSBC downstream past the Former Flintkote Plant) is referred to as the Eighteenmile Creek Corridor and is the focus of a

10

### SS-Site Summary

Remedial Investigation (RI) and Supplemental RI completed on behalf of the NYSDEC [Ref. 5; 7; 8]. The most recent study completed on behalf of EPA (for the Great Lakes National Program Office [GLNPO]) focused on collecting sediment samples from Eighteenmile Creek beginning just dow nstream of the Eighteenmile Creek Corridor for almost the entire length of the creek, but samples were not collected downstream of Burt Dam to the mouth of the creek at Lake Ontario [Ref. 9]. NYSDEC has identifie d six Operable Units (OU) within the Eighteenmile Creek Corridor and has produced two Records of Decision (ROD), but remedial actions have not been implemented [Ref. 40; 42].

Eighteenmile Creek is surrounded by six residential townships [Ref. 7, p. 24]. The land within the Eighteenmile Creek watershed consists primarily of croplands and orchards, with residential, commercial and industrial areas located around Lockport, Newfane, and Olcott Harbor [Ref. 6, pp. 51, 68]. There are 3.3 miles of wetlands along the contaminated portion of the creek, and evidence of fishing has been reporte d in the Eighteenmile Creek Corridor and other portions of the creek [Ref. 23, p. 1; 32, pp. 1-3; 35, p. 1; 36, pp. 5, 29]. The 15-Mile Surface Water Pathway begins at the farthest upstream sediment sample locations meeting observed releas e criteria and extends for 15 miles along surface water [Ref. 1, p. 51605; 31]. Fisherman’s Park, a public fishing area lo cated within Eighteenmile Creek just downstream of Burt Dam, is a major fishing destination where species of fish including steelhead trout, salmon, walleye, perch, and northern pike are caught and consumed [Figure 2E; Ref. 23, p. 1]. In addition, a consumption fishery is located on Eighteenmile Creek at Ide Road in Newfane, New York, within the zone of contamination [Ref. 35, p. 1]. The reach of Eighteenmile

Creek between Burt Dam and Lake Ontario has been classi fied as an Area of Concern (AOC) by the EPA GLNPO, due

to its natural resources value within the Lake Ontario watershed, although GLNPO subs equently evaluated upstream reaches of Eighteenmile Creek for inclusion in th is AOC [Ref. 6, pp. 27-28; 9, pp. 13, 318, 319].

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See Figure 2A Site Reference Point Burt Dam Burt Dam / Fisherman's Park Fishery

Ide Road Fishery

Newfane Dam

FIGURE #: DRAWING NUMBER: CLIENT NAME: PROJECT: LEGEND: TITLE:

PROJECT MANAGER:

SCALE:

DATE: DRAWN BY:

REVIEWED BY: 

## Site Location Map Eighteenmile Creek HRS Niagara County, NY

09850 1 J. Lynes

M. Capriglione

G. Gilliland

1" = 5,000'

July 2011 

# ®

Eighteenmile Creek HRS

EPA Note: 1. The extent of Burt Dam / Fisherman's Park Fishery is 1,370'
Sources: 1. CH2M Hill, Ecology and Environment, Inc., Environmental Design International, Inc.,

and Teska Associates, Inc. Data Summary Report Site Characterization of the Eighteenmile Creek Area of Concern. Prepared for U.S. Environmental Protection Agency. March 2011. 2. Ecology and Environment, Inc. Final Supplemental Remedial Investigation Report for

the Eighteenmile Creek Corridor Site. Prepared for New York State Department of Environmental Conservation. July 2009. 3. National Geographic TOPO! U.S. Geologic Survey (USGS). 7.5-Minute Series

(Topographic) Quadrangles: Cambria, NY 1980; Lockport, NY 1980; Newfane, NY 1978; and Wilson, NY 1979. 

# Legend

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Inset Box

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Graphic Scale In Feet Pennsylvania New York

Site Area " Canada

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# ! ( Sample ID: 18MC-L18-S02-Z1
Date: 4/25/2007 Depth: 0.2-0.9 FT
Aroclor 1242: 1.2 Copper: 1,123*

Sample ID: 18MC-L10-S01-Z1
Date: 4/23/2007 Depth: 0.5-1.5 FT
Aroclor 1248: 1.9

Aroclor 1254: 0.85

Copper: 397

Sample ID: 18MC-UP-S01-Z1
Date: 4/25/2007 Depth: 0.1-0.8 FT
Aroclor 1242: 0.023 U

Aroclor 1248: 0.023 U
Aroclor 1254: 0.023 U
Aroclor 1260: 0.023 U Benzo(a)pyrene: 0.62 Copper: 21.3

Lead: 33.5
Zinc: 108

Sample ID: 18MC-UP-S01-Z2
Date: 4/25/2007 Depth: 1.1-1.8 FT
Aroclor 1242: 0.023 U
Aroclor 1248: 0.023 U
Aroclor 1254: 0.023 U

Aroclor 1260: 0.023 U Benzo(a)pyrene: 0.38 Copper: 11.7

Lead: 8.6
Zinc: 43.7 Sample ID: 18MC-L08-S01-Z1
Date: 4/23/2007 Depth: 0.5-1.5 FT Copper: 499.1* Sample ID: 18MC-L12-S01-Z1
Date: 4/24/2007 Depth: Copper: 594* Sample ID: 18MC-L11-S02-Z1
Date: 4/24/2007 Depth: 0.5-0.9 FT Benzo(a)pyrene: 7.1

Zinc: 5,106.7* Sample ID: 18MC-L13-S03-Z1
Date: 4/24/2007 Depth: 0.5-1 FT
Aroclor 1242: 46 Copper: 2,319.7*

Zinc: 4,893.3*

Sample ID: 18MC-L09-S03-Z1
Date: 4/23/2007 Depth: 1.5-2.5 FT
Aroclor 1248: 41

Aroclor 1254: 20 Copper: 54,900 Lead: 15,000 Zinc: 21,400 Sample ID: 18MC-L09-S01-Z1
Date: 4/23/2007 Depth: 0.5-1.2 FT
Aroclor 1242: 33

Copper: 857

Sample ID: 18MC-L08-S03-Z1
Date: 4/23/2007 Depth: 0.5-1.5 FT
Aroclor 1248: 35 Sample ID: 18MC-L07-S02-Z1
Date: 4/23/2007 Depth: 0-0.8 FT
Aroclor 1248: 23 Sample ID: 18MC-L15E-S01-Z1
Date: 4/24/2007 Depth: 0.5-0.9 FT
Aroclor 1248: 1.9*

Aroclor 1254: 1* Copper: 1123*

Sample ID: 18MC-L02E-S01-Z1
Date: 4/20/2007 Depth: 0.8-1.5 FT
Aroclor 1248: 1.5

Aroclor 1254: 2.3

Sample ID: 18MC-L01W-S03-Z1
Date: 4/18/2007 Depth: 0.3-1 FT
Aroclor 1242: 0.019 U

Aroclor 1248: 0.019 U

Aroclor 1254: 0.1
Aroclor 1260: 0.019 U Benzo(a)pyrene: N/A Copper: 42 J

Lead: 227
Zinc: 240 J Sample ID: 18MC-L01W-S01-Z1
Date: 4/18/2007 Depth: 0-02 INCHES

Aroclor 1242: 0.021 U

Aroclor 1248: 0.021 U
Aroclor 1254: 0.021 U
Aroclor 1260: 0.021 U Benzo(a)pyrene: N/A

Copper: 42.09*

Lead: 411 Zinc: 1,545*

Sample ID: 18MC-L01W-S01-Z2
Date: 4/18/2007 Depth: 0.5-1 FT
Aroclor 1242: 0.019 U
Aroclor 1248: 0.019 U
Aroclor 1254: 0.019 U

Aroclor 1260: 0.019 U Benzo(a)pyrene: N/A

Copper: 25.25*

Lead: 127
Zinc: 109.65* Sample ID: 18MC-L02W-S01-Z1
Date: 4/18/2007 Depth: 1-2 FT
Aroclor 1242: 0.023 U

Aroclor 1248: 0.023 U
Aroclor 1254: 0.023 U
Aroclor 1260: 0.023 U Benzo(a)pyrene: N/A

Copper: 21.7 J

Lead: 88.8
Zinc: 64.8 J

Sample ID: 18MC-L02W-S01-Z2
Date: 4/18/2007 Depth: 2-3.2 FT
Aroclor 1242: 0.022 U
Aroclor 1248: 0.022 U
Aroclor 1254: 0.022 U

Aroclor 1260: 0.022 U Benzo(a)pyrene: N/A

Copper: 71.1 J

Lead: 204
Zinc: 149 J

Sample ID: 18MC-L02W-S03-Z1
Date: 4/18/2007 Depth: 0-2 INCHES

Aroclor 1242: 0.020 U

Aroclor 1248: 0.020 U
Aroclor 1254: 0.020 U
Aroclor 1260: 0.020 U Benzo(a)pyrene: N/A

Copper: 81.2 J

Lead: 87
Zinc: 141 J

Sample ID: 18MC-L02W-S03-Z2
Date: 4/18/2007 Depth: 3.2-4 FT
Aroclor 1242: 0.019 U
Aroclor 1248: 0.019 U
Aroclor 1254: 0.019 U

Aroclor 1260: 0.019 U Benzo(a)pyrene: N/A

Copper: 17.7 J

Lead: 28.9
Zinc: 48.5 J Sample ID: 18MC-L01W-S02-Z1
Date: 4/18/2007 Depth: 0-2 INCHES

Aroclor 1242: 0.020 U

Aroclor 1248: 0.045
Aroclor 1254: 0.020 U
Aroclor 1260: 0.020 U Benzo(a)pyrene: 0.68*

Copper: 129.32*

Lead: 412
Zinc: 319.5*

Sample ID: 18MC-L01W-S02-Z2
Date: 4/18/2007 Depth: 1-2 FT
Aroclor 1242: 0.021 U
Aroclor 1248: 0.069*
Aroclor 1254: 0.021 U

Aroclor 1260: 0.021 U Benzo(a)pyrene: 1.5*

Copper: 56.49*

Lead: 1,660
Zinc: 264* Sample ID: 18MC-L01E-S01-Z1
Date: 4/20/2007 Depth: 0-2 INCHES
Aroclor 1242: 0.020 U

Aroclor 1248: 0.020 U
Aroclor 1254: 0.035
Aroclor 1260: 0.020 U Benzo(a)pyrene: 0.3 Copper: 57.6

Lead: 145 J
Zinc: 292 J Sample ID: 18MC-L01E-S03-Z1
Date: 4/20/2007 Depth: 0-2 INCHES

Aroclor 1242: 0.021 U

Aroclor 1248: 0.026
Aroclor 1254: 0.021 U
Aroclor 1260: 0.021 U Benzo(a)pyrene: 0.34 Copper: 59.6

Lead: 113 J
Zinc: 131 J

Sample ID: 18MC-L01E-S03-Z2
Date: 4/20/2007 Depth: 0.5-1.2 FT
Aroclor 1242: 0.018 U
Aroclor 1248: 0.053
Aroclor 1254: 0.13

Aroclor 1260: 0.018 U Benzo(a)pyrene: N/A Copper: 131

Lead: 170 J
Zinc: 158 J Sample ID: 18MC-L02W-S02-Z1
Date: 4/18/2007 Depth: 0-2 INCHES

Aroclor 1242: 0.019 U

Aroclor 1248: 0.013 J
Aroclor 1254: 0.019 U
Aroclor 1260: 0.019 U Benzo(a)pyrene: 0.024 J Copper: 55.5 J

Lead: 951 J
Zinc: 140 J

Sample ID: 18MC-L02W-S02-Z2
Date: 4/18/2007 Depth: 1-2 FT
Aroclor 1242: 0.025 U
Aroclor 1248: 0.025 U
Aroclor 1254: 0.025 U

Aroclor 1260: 0.025 U Benzo(a)pyrene: N/A

Copper: 29.5 J

Lead: 138 J
Zinc: 124 J Sample ID: 18MC-L03W-S01-Z1
Date: 4/19/2007 Depth: 0.8-1.8 FT
Aroclor 1248: 0.73 Sample ID: 18MC-L15E-S03-Z1
Date: 4/24/2007 Depth: 0.5-1 FT
Aroclor 1248: 14

Aroclor 1254: 3.1 Copper: 5,598.4* Sample ID: 18MC-L16E-S01-Z1
Date: 4/24/2007 Depth: 0.4-1 FT
Aroclor 1242: 31

Aroclor 1254: 6.7 Copper: 2,163.9*

Sample ID: 18MC-L16W-S01-Z1
Date: 4/24/2007 Depth: 0.2-0.8 FT
Aroclor 1248: 5.8

Aroclor 1254: 4.5

Sample ID: 18MC-L06-S02-Z2
Date: 4/19/2007 Depth: 1-2 FT
Aroclor 1248: 0.22

Aroclor 1260: 0.65 Sample ID: 18MC-L09-S02-Z1
Date: 4/23/2007 Depth: 0-2 INCHES

Aroclor 1242: 8.8

Aroclor 1254: 2.1 Sample ID: 18MC-L14E-S02-Z1
Date: 4/24/2007 Depth: 0-2 INCHES

Aroclor 1248: 180

Aroclor 1254: 57 Copper: 942.6*

Sample ID: 18MC-L14E-S02-Z2
Date: 4/24/2007 Depth: 1-1.5 FT
Aroclor 1248: 57

Aroclor 1254: 85 Copper: 529.5* Sample ID: 18MC-L15E-S02-Z1
Date: 4/24/2007 Depth: 0-2 INCHES

Aroclor 1248: 3.7

Aroclor 1254: 1.1 Benzo(a)pyrene: 34

Copper: 596.7* Sample ID: 18MC-L16E-S02-Z1
Date: 4/24/2007 Depth: 0-0.5 FT
Aroclor 1248: 4.3

Aroclor 1254: 1.5

Sample ID: 18MC-L11-S01-Z1
Date: 4/24/2007 Depth: 1-1.6 FT
Aroclor 1248: 1.0

Aroclor 1254: 0.65 Sample ID: 18MC-L15W-S01-Z1
Date: 4/24/2007 Depth: 0.3-1.2 FT
Aroclor 1248: 0.73

Aroclor 1254: 0.67 Sample ID: 18MC-L16E-S03-Z1
Date: 4/24/2007 Depth: 0.5-1 FT
Aroclor 1248: 5.9

Aroclor 1254: 2.8

Copper: 959*

Sample ID: 18MC-L14E-S03-Z1
Date: 4/24/2007 Depth: 0-2 INCHES

Aroclor 1248: 41

Aroclor 1254: 18 Copper: 704.9*

FIGURE #: DRAWING NUMBER: CLIENT NAME: PROJECT: LEGEND: TITLE:

PROJECT MANAGER:

SCALE:

DATE: DRAWN BY:

REVIEWED BY:

R 

### Eighteenmile Creek HRS

EPA J. Lynes

2A 

## Sample Location Map Eighteenmile Creek HRS Niagara County, NY
1 of 5 Notes:
1. All results are in MG/KG
2. J - Indicates estimated value 3. * - All estimated results were adjusted for unknown bias in accordance with "Using Qualified Data to Document and Observed R elease and Observed Contamination" [Ref. 27, pp. 4-8, 14, 16, 18] 4. U - Indicates the compound was analyzed for not detected 5. N/A – The analyte was not analized for
Sources: 1. Ecology and Environment, Inc. Final Supplemental Remedial Investigation Report for the Eighteenmile Creek Corridor Site. Pr epared for New York State Department of Environmental Conservation.

July 2009. 2. NYS Cyber Security and Critical Infrastructure Coordination. “NIAGARA_County_Ortho_4bd_1ft”.http://www.nysgis.state.ny.us/ga teway/mg/2008/niagara/. 2009.P:\SAT2\Eighteenmile Creek HRS\MXD\09581_ECHRS_Sample_Loc_1of5.mxd



### July 2011 M. Capriglione

G. Gilliland

09847 1" = 1,000 ' 

# ¬ Background Sample Location Release Sample Location Site Reference Point 

# ! (

! (

! ( 

### Site Reference PointFIGURE #: DATE: CLIENT NAME: PROJECT: LEGEND: TITLE: 

### ! (

! (

! (

! ( ! (

! (

! (

! (

! (

! (

! ( ! (

! ( ! ( !

( ! ( ! ( ! ( ! ( ! ( ! (

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### See Figure 2A Sample ID: R7-094-C

Date: 11/23/2009

Depth: 0-1 FT
Aroclor 1254: 1.3

Sample ID: R7-092-C

Date: 11/24/2009

Depth: 0-1 FT
Aroclor 1254: 2.5 Sample ID: R7-091-C

Date: 11/24/2009 Depth: 0-1.4 FT
Aroclor 1254: 11

Sample ID: R7-101-C
Date: 11/30/2009 Depth: 0-0.5 FT
Aroclor 1254: 1.1

Sample ID: R7-200-C-Z1a
Date: 6/28/2010 Depth: 0-0.5 FT
Aroclor 1254: 0.052 Sample ID: R7-198-C-Comp
Date: 6/28/2010 Depth: 0-0.9 FT
Aroclor 1254: 1.3 Sample ID: R7-195-C-Comp
Date: 6/29/2010 Depth: 0-0.6 FT

Aroclor 1254: 3

Sample ID: R7-203-T-Z1a
Date: 6/29/2010 Depth: 0-0.5 FT
Aroclor 1242: 0.08 U
Aroclor 1248: 0.08 U
Aroclor 1254: 0.08 U
Aroclor 1260: 0.08 U

Sample ID: R7-204-T-Z1a
Date: 6/29/2010 Depth: 0-0.3 FT
Aroclor 1242: 0.062 U
Aroclor 1248: 0.062 U
Aroclor 1254: 0.062 U
Aroclor 1260: 0.062 U Sample ID: R7-194-C-Comp
Date: 6/29/2010 Depth: 0-0.6 FT
Aroclor 1248: 23
Aroclor 1254: 10

R 

### ! ( Background Sample Location



### ! ( Release Sample Location

Inset Box



## Eighteenmile Creek HRS

EPA June 2011 2B 

# Sample Location Map Eighteenmile Creek HRS Niagara County, NY
2 of 5 1,500 0 1,500 750

Graphic Scale In Feet 

# ®

Notes:
1. All results are in MG/KG

2. U - Undetected Value
Sources 1. CH2M Hill, Ecology and Environment, Inc. , Environmental Design International, Inc.,

and Teska Associates, Inc. Data Summary Report Site Characterization of the Eighteenmile Creek Area of Concern. Prepar ed for U.S. Environmental Protection Agency.

March 2011. 2. Ecology and Environment, Inc. Fi nal Supplemental Remedial Investigation Report for the Eighteenmile Creek Corridor Site. Prepared for New York State Department of Environmental Conservation. July 2009. 3. NYS Cyber Security and Critical Infrastruc ture Coordination. “NIAGARA_County_Ortho_4bd_1ft”.

http://www.nysgis.state.ny.us/gateway/mg/2008/niagara/. 2009.P:\SAT2\Eighteenmile Creek HRS\MXD\09576_ECHRS_Sample_Loc_2of5.mxdFIGURE #: DATE: CLIENT NAME: PROJECT: LEGEND: TITLE: ! (

! (

! (

! (

! (

! (

! (

! (

! ( ! (

! (

! (

! (

! (

! (

! (

! ( ! (

! (

Sample ID: R7-088-C

Date: 11/25/2009

Depth: 0-1 FT

Aroclor 1254: 55 Sample ID: R7-085-C

Date: 11/30/2009 Depth: 0-1.6 FT

Aroclor 1254: 7.8 Sample ID: R7-080-C
Date: 12/2/2009 Depth: 0-1.7 FT

Aroclor 1254: 0.76 Sample ID: R7-077-C

Date: 11/24/2009 Depth: 0-1.2 FT

Aroclor 1254: 1.4 Sample ID: R7-072-C
Date: 11/24/2009 Depth: 0-0.8 FT

Aroclor 1254: 3.9 Sample ID: R6-066-C

Date: 11/25/2009 Depth: 0-1.9 FT

Aroclor 1254: 4.5

Sample ID: R7-082-CR

Date: 11/30/2009 Depth: 0-1.6 FT

Aroclor 1254: 1.4 Sample ID: R7-172-C-Z1a
Date: 6/25/2010 Depth: 0-0.5 FT

Aroclor 1254: 8.4

Sample ID: R7-172-C-Comp
Date: 6/25/2010 Depth: 0-0.9 FT
Aroclor 1248: 10

Aroclor 1254: 12

Sample ID: R7-184-C-Comp
Date: 6/30/2010 Depth: 0-0.75 FT

Aroclor 1254: 6.9 Sample ID: R7-202-T-Z1a
Date: 6/29/2010 Depth: 0-0.5 FT

Aroclor 1242: 0.11 U
Aroclor 1248: 0.11 U

Aroclor 1254: 0.11 U
Aroclor 1260: 0.11 U

Sample ID: R7-202-T-Comp
Date: 6/29/2010 Depth: 0-0.9 FT

Aroclor 1242: 0.067 U

Aroclor 1248: 0.067 U
Aroclor 1254: 0.067 U

Aroclor 1260: 0.067 U

Sample ID: R7-187-C-Comp
Date: 6/30/2010 Depth: 0-0.95 FT

Aroclor 1248: 41 J
Aroclor 1254: 23 Sample ID: R7-174-C-Z1a
Date: 6/25/2010 Depth: 0-0.5 FT

Aroclor 1248: 1.8

Sample ID: R7-174-C-Comp
Date: 6/25/2010 Depth: 0-1.2 FT
Aroclor 1254: 0.71

Sample ID: R7-179-C-Comp
Date: 6/23/2010 Depth: 0-0.7 FT

Aroclor 1254: 2.1 Sample ID: R7-201-T-Z1a
Date: 6/25/2010 Depth: 0-0.5 FT

Aroclor 1242: 0.07 U
Aroclor 1248: 0.07 U

Aroclor 1254: 0.07 U
Aroclor 1260: 0.07 U

Sample ID: R7-201-T-Comp
Date: 6/25/2010 Depth: 0-1.1 FT

Aroclor 1242: 0.064 U

Aroclor 1248: 0.064 U
Aroclor 1254: 0.064 U

Aroclor 1260: 0.064 U Sample ID: R7-176-C-Z1a
Date: 6/24/2010 Depth: 0-0.5 FT

Aroclor 1248: 7.5
Aroclor 1254: 3.2

Sample ID: R7-176-C-Comp
Date: 6/24/2010 Depth: 0-0.9 FT

Aroclor 1254: 3.3

Sample ID: R7-178-C-Z1
Date: 6/24/2010 Depth: 0.5-1.2 FT

Aroclor 1254: 26 J

Aroclor 1260: 42 Sample ID: R7-180-C-Z1a
Date: 6/23/2010 Depth: 0-0.5 FT

Aroclor 1254: 1.2

Sample ID: R7-180-C-Comp
Date: 6/23/2010 Depth: 0-1.1 FT
Aroclor 1248: 26

Aroclor 1254: 18 Sample ID: R7-071-C
Date: 11/25/2009 Depth: 0-1.5 FT

Aroclor 1254: 4.2

R ! ( Background Sample Location

! ( Release Sample Location

Inset Box



## Eighteenmile Creek HRS

EPA June 2011 2C 

# Sample Location Map Eighteenmile Creek HRS Niagara County, NY
3 of 5 1,500 0 1,500 750

Graphic Scale In Feet 

# ® Notes:
1. All results are in MG/KG

2. J - Indicates estimated value 3. U - Indicates the compound was analyzed for not detected
Sources 1. CH2M Hill, Ecology and Environment, Inc., Environmental Design International, Inc.,

and Teska Associates, Inc. Data Summary Report Site Characterization of the Eighteenmile Creek Area of Concern. Prepared for U.S. Environmental Protection Agency.

March 2011. 2. NYS Cyber Security and Critical Infrastructure Coordination. “NIAGARA_County_Ortho_4bd_1ft”.

http://www.nysgis.state.ny.us/gateway/mg/2008/niagara/. 2009. 3. NYS Cyber Security and Critical Infrastructure Coordination. “NIAGARA_County_Ortho_4bd_2ft”.

http://www.nysgis.state.ny.us/gateway/mg/2008/niagara/. 2009.P:\SAT2\Eighteenmile Creek HRS\MXD\09575_ECHRS_Sample_Loc_3of5.mxdFIGURE #: DATE: CLIENT NAME: PROJECT: LEGEND: TITLE: ! ( ! ( ! (

! (

!

(

! ( ! ( Newfane Dam

Sample ID: R5-045-V-Z1

Date: 5/20/2010 Depth: 0-1 FT

Aroclor 1248: 0.88

Sample ID: R6-052-C

Date: 11/19/2009 Depth: 0-1.3 FT

Aroclor 1254: 1.3

Sample ID: R6-056-CR

Date: 11/17/2009 Depth: 0-1.2 FT

Aroclor 1254: 1 Sample ID: R4-035-C

Date: 11/17/2009 Depth: 0-0.8 FT

Aroclor 1254: 0.81 Sample ID: R4-143-C-Z1a
Date: 6/23/2010 Depth: 0-0.3 FT

Aroclor 1254: 1.1

Sample ID: R6-161-C-Z1
Date: 7/1/2010 Depth: 0.5-1.5 FT

Aroclor 1254: 25 J Sample ID: R4-119-T

Date: 11/17/2009 Depth: 0-0.5 FT

Aroclor 1242: 0.048 U
Aroclor 1248: 0.048 U

Aroclor 1254: 0.048 U
Aroclor 1260: 0.048 U

R ! ( Background Sample Location

! ( Release Sample Location

Match Line



## Eighteenmile Creek HRS

EPA July 2011 2D 

# Sample Location Map Eighteenmile Creek HRS Niagara County, NY
4 of 5 1,500 0 1,500 750

Graphic Scale In Feet 

# ®

Notes:
1. All results are in MG/KG

2. J - Indicates estimated value 3. U - Indicates the compound was analyzed for not detected
Sources 1. CH2M Hill, Ecology and Environment, Inc., Environmental Design International, Inc.,

and Teska Associates, Inc. Data Summary Report Site Characterization of the Eighteenmile Creek Area of Concern. Prepared for U.S. Environmental Protection Agency.

March 2011. 2. NYS Cyber Security and Critical Infrastructure Coordination. “NIAGARA_County_Ortho_4bd_2ft”.

http://www.nysgis.state.ny.us/gateway/mg/2008/niagara/. 2009.P:\SAT2\Eighteenmile Creek HRS\MXD\09574_ECHRS_Sample_Loc_4of5.mxdFIGURE #: DATE: CLIENT NAME: PROJECT: LEGEND: TITLE: ! ( ! (

! (

! (

!

( !

(

! ( !

( !

(

! (

! ( !

(

! ( Burt Dam / Fisherman's Park Fishery

Burt Dam

Ide Road Fishery

S l ID R5 045 V Z1 Sample ID: R3-016-V-Z3
Date: 5/26/2010 Depth: 2-3 FT

Aroclor 1248: 1.3 Sample ID: R2-009-V-Z2
Date: 5/19/2010 Depth: 1-2 FT

Aroclor 1248: 0.59

Sample ID: R2-009-V-Z3
Date: 5/19/2010 Depth: 2-3 FT
Aroclor 1248: 4.6 Sample ID: R2-001-V-Z3
Date: 5/18/2010 Depth: 2-3 FT

Aroclor 1248: 2.5

Sample ID: R2-008-V-Z2
Date: 5/19/2010 Depth: 1-2 FT

Aroclor 1248: 0.87

Sample ID: R2-015-V-Z3
Date: 5/25/2010 Depth: 2-3 FT

Aroclor 1248: 6.5

Sample ID: R4-135-C-Z1a
Date: 6/21/2010 Depth: 0-0.5 FT

Aroclor 1254: 5.3

Sample ID: R4-135-C-Comp
Date: 6/21/2010 Depth: 0-0.8 FT
Aroclor 1254: 19

Aroclor 1260: 8.3 J Sample ID: R2-013-V-Z1a
Date: 5/25/2010 Depth: 0-0.5 FT

Aroclor 1248: 0.59

Sample ID: R2-013-V-Z1b
Date: 5/25/2010 Depth: 0.5-1 FT

Aroclor 1248: 1.9 Sample ID: R2-011-V-Z1a
Date: 5/25/2010 Depth: 0-0.5 FT

Aroclor 1248: 0.38 Sample ID: R2-003-V-Z2

Date: 5/18/2010 Depth: 1-2 FT

Aroclor 1248: 0.51

Sample ID: R2-003-V-Z3
Date: 5/18/2010 Depth: 2-3 FT
Aroclor 1248: 4.1 Sample ID: R2-004-V-Z3
Date: 5/18/2010 Depth: 2-3 FT

Aroclor 1248: 2.7 Sample ID: R2-005-V-Z2
Date: 5/19/2010 Depth: 1-2 FT

Aroclor 1248: 0.47

Sample ID: R2-005-V-Z3
Date: 5/19/2010 Depth: 2-3 FT
Aroclor 1248: 7.0

Sample ID: R2-005-V-Z4
Date: 5/19/2010 Depth: 3-4 FT
Aroclor 1248: 2.8 Sample ID: R2-007-V-Z2
Date: 5/19/2010 Depth: 1-2 FT

Aroclor 1248: 2.1

Sample ID: R2-007-V-Z3
Date: 5/19/2010 Depth: 2-3 FT
Aroclor 1248: 22 Sample ID: R2-002-V-Z1
Date: 5/18/2010 Depth: 0-1 FT

Aroclor 1248: 0.42

Sample ID: R2-002-V-Z4
Date: 5/18/2010 Depth: 3-4 FT
Aroclor 1248: 1.2

R ! ( Release Sample Location

Inset Box



## Eighteenmile Creek HRS

EPA July 2011 2E 

# Sample Location Map Eighteenmile Creek HRS Niagara County, NY
5 of 5 1,500 0 1,500 750

Graphic Scale In Feet 

# ®

Notes:
1. All results are in MG/KG

2. J - Indicates estimated value
Sources 1. CH2M Hill, Ecology and Environment, Inc., Environmental Design International, Inc.,

and Teska Associates, Inc. Data Summary Report Site Characterization of the Eighteenmile Creek Area of Concern. Prepared for U.S. Environmental Protection Agency.
March 2011. 2. NYS Cyber Security and Critical Infrastructure Coordination. “NIAGARA_County_Ortho_4bd_2ft”.

http://www.nysgis.state.ny.us/gateway/mg/2008/niagara/. 2009.P:\SAT2\Eighteenmile Creek HRS\MXD\09573_ECHRS_Sample_Loc_5of5.mxd

### 2.2 SD-Characterization and Containment

SOURCE DESCRIPTION

SOURCE CHARACTERIZATION

2.2.1 Source Identification

Number of the source: Source No. 1

Name and description of the source: Ei ghteenmile Creek contaminated sediments

Source Type: Other (contaminated sediments with no identified source)

Source 1 consists of contaminated sediments in Eighteenmile Creek defined by the presence of sediment samples meeting

observed release criteria. The hazardous substances most significantly affecting the creek sediments include PCBs, metals, and benzo(a)pyrene [see Section 2.4.1 of this HR S documentation record]. The origin of these hazardous

substances in the contaminated sediments has not been identif ied due to the presence of mul tiple possible sources for the substance [see Section 4.1.2.1.1]. As a result, the source(s) of all the contamination in any particular location in the creek cannot be determined. The NYSBC runs across the upstream portion of Eighteenmile Creek [Ref. 4, p. 1]. An environmental database search shows dozens of possible po llution sources along the canal and within 1 mile of its confluence with Eighteenmile Creek [Ref. 33, pp. 1-37]. PCBs were detected in six out of seven samples (including one duplicate) collected from the NYSBC with detections ranging from 0.0066 mg/kg to 2.63 mg/kg indicating the presence of possible sources discharging to the NYSBC [Ref. 7, pp. 65, 91, 92, 112, and 130]. In Lo ckport, New York, where the Creek originates, four industrial or former industrial facilities (i.e., the Former Flintkote Plant; Former United Paperboard Company; Upson Park; and White Transportation Property) have been the focus of numerous investigations; detections of PCBs, copper, lead, zinc, and benzo(a)pyrene have been identified in Eighteenmile Creek sediment adjacent to White Transportation, Former United Paperboard, Former Flintkote Plant, Upson Park, and the areas downstream of the Former Flintkote Plant [Ref. 7, pp. 93-96, 118-129]. The highest det ection of PCBs in sediment of Eighteenmile Creek adjacent to the Former Flintkote Plant is 237 mg/kg; more sp ecifically, in sample 18MC-L14E-S02-Z1, Aroclor 1248 was detected at 180 mg/kg and Aroclor 1254 was detected at 57 mg/kg [Table 1; Ref. 7, pp. 65, 95, 126, 127].

Location of the source, with reference to a map of the site:

The sampling results using observed release criteria show that contaminated sediments are located throughoutEighteenmile Creek, from the Eighteenmile Creek Corridor in Lockport (farthest upstream sample: 18MCL03W-S01-Z1 indicated PCB Aroclor 1248 detected at 0. 73 mg/kg) to just south of the Fisherman’s Park fishery near Burt Dam (farthest downstream sample: R2 -001-V-Z3 indicated PCB Aroclor 1248 detected at 2.5 mg/kg) [Tables 1 and 2; Ref. 7, p. 116; 9, p. 89; 13, pp. 16, 20; 15, p. 49, 140; 23, p. 1]. The sample locations are shown on Figures 2A and 2E.

Containment

Release to surface water via overland migration and/or flood:

The presence of contaminated sediments provides evid ence that hazardous substances (PCBs, copper, lead, zinc, and benzo(a)pyrene) have migrated into Eighteenmi le Creek from multiple sources [see Section 4.1.2.1.1]. Therefore, a surface water containment factor value of 10 is assigned for this source [Ref. 1, p. 51609, Table 4­ 2].

18

### SD-Hazardous Substances

Source No.: 1

2.4.1 Hazardous Substances

Sampling and analysis on behalf of NYSDEC in April 2007 and on behalf of EPA from November 2009 through June 2010 showed the presence of PCBs, metals, and other hazar dous substances in Eighteenmile Creek sediments at concentrations significantly above background concentrations . Tables 1 and 2 show samples that document background

and observed release concentrations.

Notes on Sample Similarity:

The background samples from Eighteenmile Creek and its tri butaries and the contaminated samples from Eighteenmile Creek were handled the same procedurally and were similar physically, as follows:

• Physical Setting: All background and release sediment samples were collected from Eighteenmile Creek or (for certain background samples) from tributaries just upstream of the creek [Figures 1 and 2A-2F]. Eighteenmile Creek and its tributaries are considered to be part of the Eighteenmile Creek watershed [Ref. 6, pp. 14, 49]. Available flow data for Eighteenmile Creek in the East Branch and downstream at Ide Road indicate that the water body type (i.e., moderate to larg e stream) is maintained throughout the sample locations [Ref. 1, p. 51613; 8, pp. 23, 24, 26; 12, p. 1].

• Sampling Depth: Background and release samples were coll ected at depth intervals between 0 and 4 feet below top of sediment [Tables 1 and 2; Ref. 7, pp. 55- 57; 9, pp. 454, 487, 525-526, 528, 530-532, 536, 539, 546, 547, 552-556, 561, 563-568, 572-574, 577, 583-588, 581, 589; 25, pp. 5, 7, 8, 10, 15, 20-27, 30].

• Sample Description: Visual descriptions from core logs show that background and release samples within Eighteenmile Creek consist predominantly of the same material (silt with small gravel) [9, pp. 454, 487, 525­ 526, 528, 530-532, 536, 539, 546, 547, 552-556, 561, 563-568, 572-574, 577, 583-588, 581, 589; 25, pp. 5, 7, 8, 10, 15, 21-27, 30].

• Sampling Methods: The background and release sediment sa mples were all collected using coring devices. In April 2007, sediment coring was performed along trans ects using a coring device comprised of a macrocoretype sampler with dedicated acetate liners [Ref. 7, p. 41]. In November and December 2009, sediment samples were collected via hand-coring. All but one core was collected by advancing a clear polyvinyl chloride (PVC) sleeve into the sediment by hand via a pushing and twisti ng motion [Ref. 9, p. 20]. In May 2010, a vibracore was used to core into sediment until refusal [Ref. 9, p. 20]. It should be noted that, due to varying conditions present along Eighteenmile Creek, the various sampli ng methods described above (i.e., macrocore-type sampling; hand-core sampling, and vibracore sampling) were employed to retrieve sediment in cores; EPA considers the collection of sediment samples from cores to be similar, regardless of the method used to retrieve

the sediment core.

• Samples collected in 2007 were analyzed for Aroclors according to Analytical Services Protocol, New York State Department of Environmental Conservation, July 2005 (ASP05) 8082, and samples collected in 2009 and 2010 were analyzed for Aroclors according to CLP Statement of Work (SOW) SOM01.2; both protocols are based on EPA SW-846 analytical methods [Ref. 11, pp. 68, 127; 13, pp. 10, 27, 51, 70, 90, 102, 103, 129, 145, 159, 177, 195, 221, 235, 279, 280, 325, 326, 355-357, 371, 389, 390, 399, 419-421; 14, p. 12; 16, p. 13; 17, p. 12; 18, p. 12; 19, p. 11; 20, pp. 5, 12; 21, pp. 5, 12; 22, pp. 5, 12; 26, pp. 5, 13]. Each set of release samples has its own associated background samples evaluated by the same method [see Tables 1 and 2].

• Total Organic Carbon (TOC): The analytical results indicate that the ranges of background TOC levels and release TOC levels overlap [see Tables 1 and 2].

The following criteria from the HRS were used to evalua te significance above background (i.e., observed release):

• If the maximum background concentration is not detected or is less than the detection limit, an observed release is established when the sample measurement equals or exceeds the sample quantitation limit (SQL) [Ref. 1, p. 51589].

19

### SD-Hazardous Substances

Source No.: 1

• If the maximum background concentration equals or ex ceeds the detection limit, an observed release is established when the sample measurement equals or exceeds the SQL and is three times or more above the background concentration [Ref. 1, p. 51589].

• Because numerous sample analysis results are qualified as estimated (“J”) with no direction of bias specified [Tables 1 and 2; Ref. 13 through 26], EPA took a step to ensure that the observed release significant increase criteria would be met if the possible variation related to the estimates were considered. For the J-flagged results, EPA used adjustment factors presented in the EPA Fact Sheet “Using Qualified Data to Document an

Observed Release and Observed Contamination” to complete the background-release comparison, thereby compensating for probable uncertainty in the analyses [Ref. 27, pp. 1-18]. EPA took the most conservative approach to screening the data (i.e., the highest scruti ny for data to meet observed release criteria) by assuming all estimated concentrations to be of unknown bias [Table s 1 and 2]. Even after this adjustment, the observed

release criteria were met.

20EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)ReferencesBACKGROUND18MC-UP-S01-Z14/25/20070.1-0.8 feetdark gray silt with 50%mixed gravel28N/AAroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.023U0.023U0.023U0.023U0.00290.0040.00870.0035Ref. 7, pp. 51, 54, 55, 65, 84,86, 111-113, 130, 512-522; 26,pp. 4-5, 13, 16-20, 38, 66, 84,179, 874, 2602; 25, p. 30Copper21.30.16Lead33.50.4Zinc108 J1620.55Benzo(a)pyrene0.620.004118MC-UP-S01-Z24/25/20071.1-1.8 feetred-brown clay withfew fine to small gravel27N/AAroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.023U0.023U0.023U0.023U0.00290.0040.00870.0035Ref. 7, pp. 51, 54, 55, 65, 84,86, 111-113, 130, 512-522; 26,pp. 4-5, 13, 16-20, 42, 67, 85,179, 874, 2602; 25, p. 30Copper11.70.17Lead8.60.4Zinc43.7 J65.60.55Benzo(a)pyrene0.380.004118MC-L01W-S01-Z14/18/20070-2 inchesdark gray, very fine silt,moderately plastic, 30%dolostone gravel206,490Aroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.021U0.021U0.021U0.021U0.00290.0040.00870.0035Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 44, 64,137, 160, 704, 1691; 25, p. 5Copper34.5 J42.090.21Lead4110.52Zinc1,030 J1,5450.71Benzo(a)pyreneN/A0.004118MC-L01W-S01-Z24/18/20070.5-1 feetdark gray, very fine siltwith 20% dolostonegravel1429,200Aroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.019U0.019U0.019U0.019U0.00290.0040.00870.0035Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 45, 65,137, 160, 704, 1691; 25, p. 5Copper20.7 J25.250.14Lead1270.34Zinc73.1 J109.650.47Benzo(a)pyreneN/A0.0041Page 1 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L01W-S02-Z14/18/20070-2 inchesdark brown to dark206,490Aroclor 12420.020U0.0029Ref. 7, pp. 51, 53, 55, 59, 65,gray, fine silt,moderately plastic, withAroclor 12480.0450.00484, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 25, 46,20% dolostone gravelAroclor 12540.020U0.008766, 136-137, 160, 704, 1691,Aroclor 12600.020U0.00351694; 25, p. 5Copper106 J129.320.16Lead4120.38Zinc213 J319.50.52Benzo(a)pyrene0.068 J0.680.004118MC-L01W-S02-Z24/18/20071-2 feetdark brown to dark2229,200Aroclor 12420.021U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,gray, very fine silt with30% dolostone gravelAroclor 12480.0069 J0.0690.00484, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 29, 47,and 20% debrisAroclor 12540.021U0.008767, 136-137, 160, 704, 1691,(glass/plastic/metal)Aroclor 12600.021U0.00351693; 25, p. 5Copper46.3 J56.490.16Lead1,6600.38Zinc176 J2640.52Benzo(a)pyrene0.15 J1.50.004118MC-L01W-S03-Z14/18/20070.3-1 feetdark brown to gray,14N/AAroclor 12420.019U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,very fine silt,moderately plastic, 30%Aroclor 12480.019U0.00484, 86, 116, 130, 434-442; 14,pp. 4-5, 14-17, 23, 48, 68, 137,dolostone gravelAroclor 12540.1000.0087160, 704, 1691; 25, p. 5Aroclor 12600.019U0.0035Copper42 J510.14Lead2270.34Zinc240 J3600.47Benzo(a)pyreneN/A0.004118MC-L02W-S01-Z14/18/20071-2 feettan-brown, silty clay28N/AAroclor 12420.023U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,with 10% gravel and5% shell fragmentsAroclor 12480.023U0.00484, 86, 116, 130, 434-442; 14,pp. 4-5, 14-17, 23, 57, 77, 138,Aroclor 12540.023U0.0087160, 704, 1691; 25, p. 8Aroclor 12600.023U0.0035Copper21.7 J26.50.170Lead88.80.400Zinc64.8 J97.20.560Benzo(a)pyreneN/A0.0041Page 2 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L02W-S01-Z24/18/20072-3.2 feetdark gray to black27N/AAroclor 12420.022U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,plastic clay.Aroclor 12480.022U0.00484, 86, 116, 130, 434-442; 14,pp. 4-5, 14-17, 23, 58, 78, 138,Aroclor 12540.022U0.0087160, 704, 1691; 25, p. 8Aroclor 12600.022U0.0035Copper71.1 J86.70.160Lead2040.380Zinc149 J2240.530Benzo(a)pyreneN/A0.004118MC-L02W-S02-Z14/18/20070-2 inchespoorly sorted, sandy,1322,400 JAroclor 12420.019U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,gravelly sediment with20% shell fragmentsAroclor 12480.013J0.130.00484, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 59, 79,Aroclor 12540.019U0.0087138, 160, 704, 1691, 1695; 25,Aroclor 12600.019U0.0035p. 7Copper55.5 J67.70.14Lead951 J13690.34Zinc140 J2100.47Benzo(a)pyrene0.024 J0.240.004118MC-L02W-S02-Z24/18/20071-2 feetmottled dark and light3431,500Aroclor 12420.025U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,gray clay; appearsnativeAroclor 12480.025U0.00484, 86, 114, 116, 130, 434-442;14, pp. 4-5, 14-17, 23, 60, 80,Aroclor 12540.025U0.0087138, 160, 704, 1691, 1693; 25,Aroclor 12600.025U0.0035p. 8Copper29.5 J360.180Lead138 J1990.430Zinc124 J1860.590Benzo(a)pyreneN/A0.004118MC-L02W-S03-Z14/18/20070-2 inchestan-brown, silty clay16N/AAroclor 12420.020U0.0029Ref. 7, pp. 51, 53, 56, 59, 65,with 10-15 % graveland few organicAroclor 12480.020U0.00484, 86, 116, 130, 434-442; 14,pp. 4-5, 14-17, 23, 62, 82, 138,fragmentsAroclor 12540.020U0.0087160, 704, 1691; 25, p. 8Aroclor 12600.020U0.0035Copper81.2 J99.10.140Lead870.350Zinc141 J2120.480Benzo(a)pyreneN/A0.0041Page 3 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L02W-S03-Z24/18/20073.2-4 feetdark gray to black,plastic clay; appearsnative15N/AAroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.019U0.019U0.019U0.019U0.00290.0040.00870.0035Ref. 7, pp. 51, 53, 56, 59, 65,84, 86, 116, 130, 434-442; 14,pp. 4-5, 14-17, 23, 63, 83, 138,704, 1691; 25, p. 8Copper17.7 J21.60.14Lead28.90.34Zinc48.5 J72.80.47Benzo(a)pyreneN/A0.004118MC-L01E-S01-Z14/20/20070-2 inchesblack, granular soilwith 5% fine gravel20193,000Aroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.020U0.020U0.0350.020U0.00290.0040.00870.0035Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 118-119, 130, 464-475;17, pp. 4-5, 14-17, 23, 64, 84,146, 169, 933, 2046, 2050; 25,p. 15Copper57.60.150Lead145 J2090.350Zinc292 J4380.480Benzo(a)pyrene0.30.004118MC-L01E-S03-Z14/20/20070-2 inchesdark brown soil with10% fine gravel2351,400Aroclor 1242Aroclor 1248Aroclor 1254Aroclor 12600.021U0.0260.021U0.021U0.00290.0040.00870.0035Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 118-119, 130, 464-475;17, pp. 4-5, 14-17, 23, 29, 65,85, 146, 169, 933, 1940, 1942;CopperLead59.6113 J1920.160.3925, p. 15Zinc131 J1970.53Benzo(a)pyrene0.340.004118MC-L01E-S03-Z24/20/20070.5-1.2 feetbrown soil with clayand silt, slightly plastic,15% fine gravel andasphalt fragments6N/AAroclor 1242Aroclor 1248Aroclor 1254Aroclor 1260CopperLead0.018U0.0530.130.018U131170 J2450.00290.0040.00870.00350.120.3Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 118-119, 130, 464-475;17, pp. 4-5, 14-17, 23, 66, 86,146, 169, 933; 25, p. 15Zinc158 J2370.42Benzo(a)pyreneN/A0.0041OBSERVED RELEASE18MC-L03W-S01-Z14/19/20070.8-1.8 feetdark brown, soft siltwith 10% gravel32N/AAroclor 12480.730.004Ref. 7, pp. 51, 53, 56, 59, 65,84, 86, 116, 130, 443-452; 15,pp. 4-5, 14-16, 19, 49, 140, 752;25, p. 10Page 4 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L02E-S01-Z14/20/20070.8-1.5 feetDark gray to black siltwith estimated 20%24N/AAroclor 1248Aroclor 12541.52.30.0040.0087Ref. 7, pp. 51, 53, 55, 59, 65,84, 86, 118-119, 130, 464-475;fine to small gravel17, pp. 4-5, 14-17, 23, 67, 147,933; 25, p. 1018MC-L07-S02-Z14/23/20070-2 inchesblack soft silt with 15%gravel4980,500Aroclor 1248230.004Ref. 7, pp. 51, 53, 56, 59, 65,84, 86, 120, 122, 130, 476-483;18, pp. 4-5, 14-17, 23, 56, 141,1855, 1857; 25, p. 2118MC-L08-S01-Z14/23/20070.5-1.5 feetdark brown clay rich71N/ACopper609 J499.20.42Ref. 7, pp. 51, 53, 56, 59, 65,soil with 35% wood84, 86, 122, 130, 476-483; 18,fragmantspp. 4-5, 12, 82, 820, 1855,1857; 25, p. 2118MC-L08-S03-Z14/23/20070.5-1.5 feetMixed brown silty,39N/AAroclor 1248350.004Ref. 7, pp. 51, 53, 56, 59, 65,sandy, clay. 10-20%84, 86, 122, 130, 476-483; 18,unsorted gravelpp. 4-5, 14-17, 23, 64, 140, 820;25, p. 2018MC-L09-S01-Z14/23/20070.5-1.2 feetBrown clay with graveland wood fragments61N/AAroclor 1242Copper338570.00290.3Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 122, 130, 484-491; 19,pp. 3-5, 10-11, 18, 39, 54, 111,747; 25, p. 2218MC-L09-S02-Z14/23/20070-2 inchesLoose black sedimentwith mix of poorly3850,600Aroclor 1242Aroclor 12548.82.10.00290.0087Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 120, 122, 130, 484-491;sorted sand, gravel, and19, pp. 3-5, 10-11, 18, 40, 112,silt747, 1840, 1842; 25, p. 2218MC-L09-S03-Z14/23/20071.5-2.5 feetBlack, unconsolidatedsediment comprised ofa mix of silt, sand, andfine gravel. Possiblevery light sheen.30N/AAroclor 1248Aroclor 1254CopperLeadZinc412054,90015,00021,4000.0040.00873.42.111.3Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 123, 130, 484-491; 19,pp. 3-5, 10-11, 18, 42, 57, 112,747; 25, p. 2218MC-L10-S01-Z14/23/20070.5-1.5 feetDark brown loose topsoil with fragments ofwood, fine gravel, and39N/AAroclor 1248Aroclor 1254Copper1.90.853970.0040.00870.2Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 123, 130, 484-491; 19,pp. 3-5, 10-11, 18, 47, 62, 112,few sand747; 25, p. 2318MC-L10-S01-Z1/D4/23/20070.5-1.5 feetDark brown loose topsoil with fragments of32N/AAroclor 1248Aroclor 12541.20.630.0040.0087Ref. 7, pp. 53, 57, 59, 65, 84-86, 123, 130, 484-491; 19, pp. 3-wood, fine gravel, and5, 10-11, 18, 48, 112, 747; 25,few sandp. 23Page 5 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L11-S01-Z14/24/20071-1.6 feetDark gray to dark tanmixed soft silt. Possible41N/AAroclor 1248Aroclor 12541.00.650.0040.0087Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 123, 130, 492-499; 20,light sheenpp. 4-5, 14-17, 23, 64, 143; 25,p. 2418MC-L11-S02-Z14/24/20070.5-0.9 feetblack silty sedimentwith 30% mixed gravelN/AN/AZincBenzo(a)pyrene7,660 J7.15,106.77.10.0041Ref. 7, pp. 51, 53, 57, 59, 65,84, 86, 123, 130, 492-499; 20,and unsorted sandpp. 4-5, 12, 14, 17, 21, 23, 25,85, 143, 163; 25, p. 2418MC-L12-S01-Z14/24/20071.0-1.6 feetTan to dark brown softN/AN/ACopper725 J5940.19Ref. 7, pp. 51, 53, 57, 59, 65,silt with black streaks84, 86, 126, 130, 492-499; 20,and some small gravel.pp. 4-5, 12, 17, 21, 23, 90, 143;25, p. 2418MC-L13-S03-Z14/24/20070.5-1.0 feetBlack silt with 20%coarse sand to small52N/AAroclor 1242Copper462,830 J2,319.70.00290.25Ref. 7, pp. 52-53, 57, 59, 65,84, 86, 126, 130, 500-511; 21,gravel and fragments ofZinc7,340 J4,893.38.3pp. 4-5, 13-15, 18, 37, 53, 114,plastic730, 1260, 1264; 25, p. 2618MC-L14E-S02-Z14/24/20070-2 inchesGray silt with 25%sorted sand and gravel4651,000Aroclor 1248Aroclor 1254Copper180571150 J942.60.0040.00870.22Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 124, 126, 130, 492-499;20, pp. 4-5, 14-17, 23, 77, 97,144, 935, 1894, 1900; 25, p. 2518MC-L14E-S02-Z24/24/20071-1.5 feetDark brown silt with10% fine gravel3879,000Aroclor 1248Aroclor 1254Copper5785646 J529.50.0040.00870.19Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 124, 126, 130, 492-499;20, pp. 4-5, 14-17, 23, 78, 98,144, 935, 1894, 1901; 25, p. 2518MC-L14E-S03-Z14/24/20070-2 inchesBlack silt with 25%fine gravel and organicmatter37N/AAroclor 1248Aroclor 1254Copper4118860 J704.90.0040.00870.19Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 126, 130, 492-499; 20,pp. 4-5, 14-17, 23, 79, 99, 144,935; 25, p. 2518MC-L15E-S01-Z14/24/20070.5-0.9 feetDark gray silt with 25%unsorted sand and small57N/AAroclor 1248Aroclor 125419 J10 J1.910.0040.0087Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 126, 130, 500-511; 21,gravelCopper1,370 J1,1230.29pp. 4-5, 13-15, 18, 38, 54, 115,737, 1260, 1265; 25, p. 2618MC-L15E-S02-Z14/24/20070-2 inchesBrown-gray silt with60% unsorted sand and35100,000Aroclor 1248Aroclor 12543.71.10.0040.0087Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 125, 127, 130, 500-511;fine gravelCopperBenzo(a)pyrene728 J34596.70.190.004121, pp. 4-5, 13-15, 18, 20, 40,115, 137, 142, 751, 1260, 1267;25, p. 26Page 6 of 7EIGHTEENMILE CREEK HRSTABLE 1 - BACKGROUND AND RELEASE SAMPLESSUPPLEMENTAL REMEDIAL INVESTIGATION REPORT, JULY 2009Sample IDDateDepthSample DescriptionPercentMoistureTOC(mg/kg)SubstanceResults (mg/kg)Adjusted Result(mg/kg) *Detection Limit(mg/kg)References18MC-L15E-S03-Z14/24/20070.5-1.0 feetSoft brown silt. 20%fine to small gravel42N/AAroclor 1248Aroclor 1254Copper143.16,830 J5,598.40.0040.00870.2Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 127, 130, 500-511; 21,pp. 4-5, 13-15, 18, 41, 57, 114,758, 1260, 1268; 25, p. 2618MC-L15W-S01-Z14/24/20070.3-1.2Dark brown clay-richsoil wth 30% organic50N/AAroclor 1248Aroclor 12540.730.670.0040.0087Ref. 7, pp. 52, 54, 57, 59, 65,84, 86, 127, 130, 500-511; 21,matter and 10% smallpp. 4-5, 13-15, 18, 42, 115, 765,gravel1260; 25, p. 2718MC-L16E-S01-Z14/24/20070.4-1.0 feetBlack to dark brown siltwith 25% organicmatter and 10% fine to50N/AAroclor 1242Aroclor 1254Copper316.72,640 J2,163.90.00290.00871.2Ref. 7, pp. 52, 54, 57, 60, 65,84, 86, 127, 130, 500-511; 21,pp. 4-5, 13-15, 18, 44, 60, 115,medium gravel779, 1202, 1209, 1260, 1271;25, p. 2618MC-L16E-S02-Z14/24/20070-0.5 feetSoft black silt with 10%wood fragments5650,200Aroclor 1248Aroclor 12544.31.50.0040.0087Ref. 7, pp. 52, 54, 57, 60, 65,84, 86, 125, 127, 130, 500-511;21, pp. 4-5, 13-15, 18, 45, 115,786; 25, p. 2618MC-L16E-S03-Z14/24/20070.5-1 feetDark brown silt with30% organic fragments(roots) and 5% small59N/AAroclor 1248Aroclor 1254Copper5.92.81,170 J9590.0040.00870.3Ref. 7, pp. 52, 54, 57, 60, 65,84, 86, 127, 130, 500-511; 21,pp. 4-5, 13-15, 18, 46, 62, 115,gravel793, 1260, 1273; 25, p. 2618MC-L16W-S01-Z14/24/20070.2-0.8 feetBrown-red silt with20% organic fragments49N/AAroclor 1248Aroclor 12545.84.50.0040.0087Ref. 7, pp. 52, 54, 58, 60, 65,84, 86, 129, 130, 500-511; 21,and 15% fine to smallpp. 4-5, 13-15, 18, 47, 115, 800;gravel25, p. 2718MC-L18-S02-Z14/25/20070.2-0.9 feetMixed brown silt with40% fine wood4636,300Aroclor 1242Copper1.21,3700.00290.22Ref. 7, pp. 52, 54, 58, 60, 65,84, 86, 128-130, 523-531; 22,fragments and a fewpp. 4-5, 14-16, 19, 48, 66, 125,fine gravel687, 1935, 1939; 25, p. 29Notes:U - Indicates the compound was analyzed for not detected [Ref. 14, p. 23; 15, p. 19; 17, p. 23; 18, p. 23; 19, p. 18; 20, p. 23; 21, p. 18; 22, p. 19; 26, p. 20]J - Indicates estimated value [Ref. 14, p. 23; 15, p. 19; 17, p. 23; 18, p. 23; 19, p. 18; 20, p. 23; 21, p. 18; 22, p. 19; 26, p. 20]*All estimated results were adjusted for unknown bias in accordance with "Using Qualified Data to Document and Observed Release and Observed Contamination" [Ref. 27, pp. 4-8, 14, 16, 18]The sample analyses were not performed under the EPA CLP and the analytical data packages do not establish SQLs, so the detection limits are used [Ref. 1, p. 51589].Boldindicates maximum background levelsPage 7 of 7EIGHTEENMILE CREEK HRSTABLE 2 - BACKGROUND AND RELEASE SAMPLESDATA SUMMARY REPORT, MARCH 2011Sample IDDateDepth(ft bgs)Sample DescriptionGrain Size(% fines)*TOC(mg/kg)Hazardous SubstanceResult(mg/kg)AdjustedResult(mg/kg)*% MoistureDilutionFactorSQL(mg/kg)ReferencesTRIBUTARY (BACKGROUND) SAMPLESR7-203-T-Z1a6/29/20100-0.5Silt, little fine sand, some organic53.750,200PCB-1242 (AROCLOR 1242)0.08U591.00.080Ref. 9, pp. 77, 216, 228, 329, 330, 555, 587, 744-matterPCB-1248 (AROCLOR 1248)0.08U0.080749, 1965, 2118, 2197; 13, pp. 248, 256, 273; 30,PCB-1254 (AROCLOR 1254)0.08U0.080pp. 40; 38, pp. 1, 2PCB-1260 (AROCLOR 1260)0.08U0.080R7-204-T-Z1a6/29/20100-0.3Brown silt, trace organic matter40.352,300PCB-1242 (AROCLOR 1242)0.062U471.00.062Ref. 9, pp. 77, 216, 228, 330, 556, 587, 721-726,PCB-1248 (AROCLOR 1248)0.062U0.0622120, 2198; 13, pp. 182, 183, 188; 30, pp. 41; 38,PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.062U0.062U0.0620.062pp. 1, 2R7-201-T-Comp6/25/20100-1.1Brown silt, organic traces of gravel52.428,400PCB-1242 (AROCLOR 1242)0.064U491.00.064Ref. 9, pp. 77, 214, 228, 326, 553, 585, 744-749,PCB-1248 (AROCLOR 1248)0.064U0.0642838, 2994, 3075; 13, pp. 248, 252, 267; 30, pp.PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.064U0.064U0.0640.06440; 38, pp. 1, 2R7-201-T-Z1a6/25/20100-0.5Brown and grey silt, organic matter,89.334,200PCB-1242 (AROCLOR 1242)0.07U531.00.070Ref. 9, pp. 77, 214, 227, 326, 553, 585, 727-731,and traces of gravelPCB-1248 (AROCLOR 1248)0.07U0.0702996, 3076; 13, pp. 163, 164, 169; 30, pp. 40; 38,PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.07U0.07U0.0700.070pp. 1, 2R7-202-T-Comp6/29/20100-0.9Grey-brown silt and mixed sand and6530,600PCB-1242 (AROCLOR 1242)0.067U511.00.067Ref. 9, pp. 77, 214, 228, 326, 554, 587, 721-726,wet soft organic matterPCB-1248 (AROCLOR 1248)0.067U0.0671962, 2112, 2194; 13, pp. 182, 183, 189; 30, pp.PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.067U0.067U0.0670.06740; 38, pp. 1, 2R7-202-T-Z1a6/29/20100-0.5Grey-brown silt and mixed sand andwet soft organic matter84.945,900PCB-1242 (AROCLOR 1242)PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.11U0.11U0.11U0.11U691.00.1100.1100.1100.110Ref. 9, pp. 77, 216, 228, 326, 554, 587, 744-749,1963, 2114, 2195; 13, pp. 248, 255, 272; 30, pp.40; 38, pp. 1, 2R4-119-T11/17/20090-0.5Brown and green clay few rootlets80.422,000PCB-1242 (AROCLOR 1242)0.048U31.91.00.048Ref. 9, pp. 58, 301, 322, 561, 139, 224, 352; 13,little to trace silt and sandPCB-1248 (AROCLOR 1248)0.048U0.048pp. 323, 326, 335; 30, pp. 33; 38, pp. 1, 2PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)0.048U0.048U0.0480.048RELEASE SAMPLESR7-071-C11/25/20090-1.5Brown soft silt with few mixed sand61.472,000PCB-1254 (AROCLOR 1254)4.267.410.01.0Ref. 9, pp. 59, 188, 227, 302, 326, 385, 566; 13,pp. 469, 470, 472, 473; 30, pp. 35, 38, pp. 1, 2Dark gray siltRef. 9, pp. 59, 188, 227, 302, 326, 386, 565; 13,R7-072-C11/24/20090-0.867.293,000PCB-1254 (AROCLOR 1254)3.953.210.00.70pp. 416, 419, 429, 430; 30, pp. 35; 38, pp. 1, 2R7-077-C11/24/20090-1.2Dark gray to black soft silt with few69.473,000PCB-1254 (AROCLOR 1254)1.4675.00.50Ref. 9, pp. 60, 190, 227, 302, 326, 391, 565; 13,mixed sandpp. 416, 419, 427, 428; 30, pp. 35; 38, pp. 1, 2R7-080-C12/2/20090-1.70.1-0.2 Grey silty clay with mediumgrained sand, organics; 0.2-0.3 finesub angular gravel; 0.3-1.1 grey toblack stained silty clay with finesand, organics sheen and fuel odor;1.1-1.3 black material with strongfuel odor; 1.3-1.7 black stained64.341,000PCB-1254 (AROCLOR 1254)0.7647.51.00.062Ref. 9, pp. 60, 190, 227, 302, 326, 394, 568; 13,pp. 478, 481, 483; 30, pp. 35; 38, pp. 1, 2clayey silt w/o cindersR7-082-CR11/30/20090-1.60-1.4 Gray to black clay silt withsparse sand, high organic content,sheen faint fuel odor, saturated; 1.4-61.539,000PCB-1254 (AROCLOR 1254)1.449.35.00.33Ref. 9, pp. 60, 192, 227, 302, 327, 396, 567; 13,pp. 418, 420, 435, 436; 30, pp. 35; 38, pp. 1, 21.6 Reddish brown clayR7-085-C11/30/20090-1.6Medium to dark brown clayey silt45.762,000PCB-1254 (AROCLOR 1254)7.854.410.00.72Ref. 9, pp. 60, 192, 227, 302, 327, 399, 567, 1510;with high organic content, saturated,13, pp. 418, 420, 437, 438; 30, pp. 35; 38, pp. 1,2sheen, fuel odor present.R7-088-C11/25/20090-1Moist clayey sand almost black61.891,000PCB-1254 (AROCLOR 1254)5553.4100.07.0Ref. 9, pp. 60, 192, 227, 303, 327, 402, 566; 13,pp. 469, 471, 476, 477; 30, pp. 36; 38, pp. 1, 2Page 1 of 4EIGHTEENMILE CREEK HRSTABLE 2 - BACKGROUND AND RELEASE SAMPLESDATA SUMMARY REPORT, MARCH 2011Sample IDDateDepth(ft bgs)Sample DescriptionGrain Size(% fines)*TOC(mg/kg)Hazardous SubstanceResult(mg/kg)AdjustedResult(mg/kg)*% MoistureDilutionFactorSQL(mg/kg)ReferencesR7-091-C11/24/20090-1.4Saturated silty sand, dark brown andorganic debris44.5109,000PCB-1254 (AROCLOR 1254)1167.210.01.0Ref. 9, pp. 60, 194, 227, 303, 327, 328, 405, 565;13, pp. 416, 420, 431, 432; 30, pp. 36; 38, pp. 1, 3R7-092-C11/24/20090-1Saturated silty sand, dark brown andslight organic odor53.164,000PCB-1254 (AROCLOR 1254)2.558.510.00.79Ref. 9, pp. 60, 194, 227, 303, 328, 406, 565; 13,pp. 417, 420, 433, 434; 30, pp. 36; 38, pp. 1, 3R7-094-C11/23/20090-1Black silt with mixed sand62.164,000PCB-1254 (AROCLOR 1254)1.365.81.00.096Ref. 9, pp. 60, 194, 227, 303, 328, 408, 564, 1311;13, pp. 387, 389, 397; 30, pp. 36; 38, pp. 1, 3R7-172-C-Comp6/25/20100-0.9Dark gray and brown silt and sand,hydrocarbon odor3542,900PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)10125250.03.43.4Ref. 9, pp. 75, 200, 227, 325, 326, 524, 585, 738-742, 2823, 2964, 3060; 13, pp. 283, 286, 299,300; 30, pp. 36; 38, pp. 1, 3R7-172-C-Z1a6/25/20100-0.5Dark gray and brown silt and sand,hydrocarbon odor3058,600PCB-1254 (AROCLOR 1254)8.45415.01.1Ref. 9, pp. 75, 200, 227, 325, 326, 524, 585, 744-749, 2966, 3061; 13, pp. 248, 252, 263, 264; 30,pp. 37; 38, pp. 1, 3R7-174-C-Z1a6/25/20100-0.5Mixed silt, mostly dark gray, little79.382,200PCB-1248 (AROCLOR 1248)1.8695.00.53Ref. 9, pp. 75, 202, 227, 326, 526, 585, 744-749,brown , fine gravel and sand with2828, 2974; 13, pp. 248, 252, 265, 266; 30, pp.some decayed organics, hydrocarbonodor, slight sheen37; 38, pp. 1, 3R7-176-C-Comp6/24/20100-0.9Mix of sandy silt, brown and black,31.3108,000PCB-1254 (AROCLOR 1254)3.35910.00.80Ref. 9, pp. 75, 202, 227, 326, 528, 584, 738-742,slight odor no sheen2831, 2980; 13, pp. 283, 286, 295, 296; 30, pp.37; 38, pp. 1, 3R7-176-C-Z1a6/24/20100-0.5Mix of sandy silt, brown and black,slight odor no sheen44.8106,000PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)7.53.27510.01.31.3Ref. 9, pp. 75, 202, 227, 326, 528, 584, 744-749,2832, 2982; 13, pp. 248, 251, 259, 260; 30, pp.37; 38, pp. 1, 3R7-178-C-Z16/24/20100.5-1.20.4-0.9 dark gray silt with fewdecayed oragnics; 0.9-1.2 brown siltysand52.2130,000PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)PCB-1260 (AROCLOR 1260)16 NJ26 J421.6 NJ2.6 J64100.09.19.19.1Ref. 9, pp. 75, 204, 227, 326, 327, 530, 584, 738-742, 2990; 13, pp. 283, 286, 297, 298; 30, pp. 37;38, pp. 1, 3R7-179-C-Comp6/23/20100-0.7All wet soft brown silt, little traces of80.741,400PCB-1254 (AROCLOR 1254)2.16510.00.94Ref. 9, pp. 75, 204, 227, 327, 531, 583, 738-742,gravel.1577, 1832; 13, pp. 283, 285, 291, 292; 30, pp. 38R7-180-C-Comp6/23/20100-1.10-0.5 Brown sandy silt , traces ofgravel, decayed organics; 0.5-1.142.764,500PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)261851100.06.76.7Ref. 9, pp. 75, 204, 227, 327, 532, 583, 738-742,1579, 1836; 13, pp. 283, 285, 293, 294; 30, pp.brown silt with little sand, traces of38; 38, pp. 1, 3organicsR7-184-C-Comp6/30/20100-0.75Very dark gray-brown clayey siltwith fine sand. Very thin film of medbrown sandy silt. Strong sweet/rancidfuel odor. Bubbly and oil sheen on67.8101,000PCB-1254 (AROCLOR 1254)6.95250.03.4Ref. 9, pp. 76, 206, 227, 327, 536, 588, 750-755,2247, 2485; 13, pp. 207, 209, 216, 217; 30, pp.38; 38, pp. 1, 3water surface.R7-187-C-Comp6/30/20100-0.950-0.5 dark grey-brown organicsilt/muck, mild sulfur odor; 0.5-0.9571.153,700PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)41 J234.1 J5950.04.04.0Ref. 9, pp. 76, 208, 227, 327, 539, 588, 721-726,2252, 2495; 13, pp. 182, 184, 190, 191; 30, pp.dark gray brown sandy silt/muck,38; 38, pp. 1, 3high organic content, very mild decayodor.R7-194-C-Comp6/29/20100-0.6Dark gray-brown silty sand with finegravel, organics, paint chips, metal21.884,700PCB-1248 (AROCLOR 1248)PCB-1254 (AROCLOR 1254)23106350.04.44.4Ref. 9, pp. 76, 210, 227, 328-330, 546, 587, 744-749, 1958, 2104; 13, pp. 248, 255, 270, 271; 30,shards, plastic shreds, mild odor ofpp. 39; 38, pp. 1, 3sweet/rancid fuel smell.R7-195-C-Comp6/29/20100-0.6Gray-brown silty sand with finegravel, organic material, blackstaining, shredded rubber, and plastic,strong rancid/sweet fuel odor. Darker22.866,600PCB-1254 (AROCLOR 1254)3.04210.00.57Ref. 9, pp. 76, 212, 227, 329, 330, 547, 587, 727-731; 1959, 2106; 13, pp. 163, 167, 173, 174; 30,pp. 39, 38, pp. 1, 3stained lens at 0.2Page 2 of 4EIGHTEENMILE CREEK HRSTABLE 2 - BACKGROUND AND RELEASE SAMPLESDATA SUMMARY REPORT, MARCH 2011Sample IDDateDepth(ft bgs)Sample DescriptionGrain Size(% fines)*TOC(mg/kg)Hazardous SubstanceResult(mg/kg)AdjustedResult(mg/kg)*% MoistureDilutionFactorSQL(mg/kg)ReferencesR7-198-C-Comp6/28/20100-0.90-0.5 medium brown, fine to mediumgrained sand; 0.5-0.9 dark brown toblack sandy silt with decayingorganic matter, shredded plastic andblack streaking, sweet/rancid fuel likeodor28.457,500PCB-1254 (AROCLOR 1254)1.3405.00.27Ref. 9, pp. 76, 212, 227, 329, 330, 586, 727-731,550, 3119, 3260; 13, pp. 163, 165, 171, 172; 30,pp. 39; 38; pp. 1, 3R7-200-C-Z1a6/28/20100-0.5Dark brown silty sand23.566,900PCB-1254 (AROCLOR 1254)0.52441.00.059Ref. 9, pp. 77, 214, 227, 329, 330, 552, 586, 744-749, 3124, 3270; 13, pp. 248, 253, 268; 30, pp.39; 38, pp. 1, 4R6-052-C11/19/20090-1.3Black silt, strong hydrocarbons odor,67.684,000PCB-1254 (AROCLOR 1254)1.367.55.00.5Ref. 9, pp. 59, 167, 226, 301, 323, 324, 362, 563;sheen visible13, pp. 356, 354, 368, 369; 30, pp. 34; 38, pp. 1, 4R6-056-CR11/17/20090-1.2Sandy gravel with few clays,52.526,000PCB-1254 (AROCLOR 1254)1.039.910.00.55Ref. 9, pp. 59, 167, 226, 301, 324, 366, 561; 13,brownish gray with some redpp. 319, 320, 323, 326; 30, pp. 34; 38, pp. 1, 4observed, dark blue sheenR6-066-C11/25/20090-1.9Gray silt with sand and decayedorganics69.947,000PCB-1254 (AROCLOR 1254)4.560.710.00.82Ref. 9, pp. 59, 171, 226, 301, 325, 326, 376, 566;13, pp. 469, 470, 474, 475; 30, pp. 34; 38, pp. 1,4R6-161-C-Z17/1/20100.5-1.50.5-1.2 mixed black silt and fine sandand few gravel and up to 50%decayed organics; 1.2-1.5 black silt,hydrocarbon odor, no sheen57.551,500PCB-1254 (AROCLOR 1254)25 J2.5 J65100.09.5Ref. 9, pp. 74, 179, 226, 324, 513, 589, 733-737,3390, 3547; 13, pp. 226, 229, 231, 232; 30, pp.34; 38, pp. 1, 4R5-045-V-Z15/20/20100-1Brown silt with mostly twigs andN/AN/APCB-1248 (AROCLOR 1248)0.88751.00.13Ref. 9, pp. 71, 154, 323, 477, 574, 862-869; 13,organics, wetpp. 115, 116, 121; 30, pp. 34; 38, pp. 1, 4R4-135-C-Comp6/21/20100-0.8Mix of dark and brown silt, sand and21.143,200PCB-1254 (AROCLOR 1254)195950.04.0Ref. 9, pp. 73, 139, 224, 321, 322, 487, 581, 738-organics, moderate hydrocarbonPCB-1260 (AROCLOR 1260)8.3 J0.83 J742; 1565, 1808, 4691; 13, pp. 283, 284, 288,odor, little sheen289; 30, pp. 33; 38, pp. 1, 4R4-135-C-Z1a6/21/20100-0.5Mix of dark and brown silt, sand and47.1115,000PCB-1254 (AROCLOR 1254)5.36710.00.99Ref. 9, pp. 73, 139, 224, 321, 322, 487, 581, 744-organics, moderate hydrocarbon749, 1566, 1810; 13, pp. 248, 249, 257, 258; 30,odor, little sheenpp. 33; 38, pp. 1, 4R4-143-C-Z1a6/23/20100-0.3Decayed organics twigs and lleaves,with little brown silt.33.7102,000PCB-1254 (AROCLOR 1254)1.1641.00.091Ref. 9, pp. 73, 141, 224, 322, 583, 738-742, 495,1576, 1830; 13, pp. 283, 285, 290; 30, pp. 33; 38,1, 4R2-001-V-Z35/18/20102-3Wet black slightly soft fine silt97.991,800PCB-1248 (AROCLOR 1248)2.5755.00.66Ref. 9, pp. 62, 89, 222, 320, 434, 572, 767-772,4686, 4847; 13, pp. 15, 16, 19, 20; 30, pp. 30; 38,pp. 1, 4R2-002-V-Z15/18/20100-1Soft very fine silt, few organics(leaves)98.846,200PCB-1248 (AROCLOR 1248)0.42721.00.12Ref. 9, pp. 62, 91, 222, 320, 436, 572, 798-804,4691, 4852; 13, pp. 39, 40, 44; 30, pp. 30; 38, pp.1, 4R2-003-V-Z25/18/20101-2Dark gray silt, few twigs and leaves99.442,800PCB-1248 (AROCLOR 1248)0.51671.00.099Ref. 9, pp. 62, 93, 222, 320, 438, 572, 767-772,debris4700, 4797; 13, pp. 15, 17, 21; 30, pp. 30; 38, pp.1,4R2-003-V-Z35/18/20102-3Dark gray silt, few twigs and leaves93.892,400PCB-1248 (AROCLOR 1248)4.1755.00.66Ref. 9, pp. 62, 93, 222, 320, 438, 572, 767-772,debris4701, 4798; 13, pp. 15, 18, 24, 25; 30, pp. 30; 38,pp. 1, 4R2-004-V-Z35/18/20102-3Gray-black very soft silt, feworganics (leaves, roots), hydrocarbonodor98.173,100PCB-1248 (AROCLOR 1248)2.7745.00.63Ref. 9, pp. 63, 95, 222, 320, 440, 572, 767-772,4240, 4267; 13, pp. 15, 18, 22, 23; 30, pp. 30; 38,pp. 1, 4R2-005-V-Z25/19/20101-2Brown-gray very fine, soft silt, feworganics99.246,900PCB-1248 (AROCLOR 1248)0.47661.00.096Ref. 9, pp. 63, 95, 222, 320, 442, 573, 831-836,4245, 4272; 13, pp. 74, 75, 77; 30, pp. 31; 38, pp.1, 4Page 3 of 4EIGHTEENMILE CREEK HRSTABLE 2 - BACKGROUND AND RELEASE SAMPLESDATA SUMMARY REPORT, MARCH 2011Sample IDDateDepth(ft bgs)Sample DescriptionGrain Size(% fines)*TOC(mg/kg)Hazardous SubstanceResult(mg/kg)AdjustedResult(mg/kg)*% MoistureDilutionFactorSQL(mg/kg)ReferencesR2-005-V-Z35/19/20102-3Black gray very fine silt, few rootletsand leaves, slight sheen, hydrocarbonodor97.9107,000PCB-1248 (AROCLOR 1248)7.07110.01.1Ref. 9, pp. 63, 95, 222, 320, 442, 573, 831-836,4246, 4273; 13, pp. 74, 75, 78, 79; 30, pp. 31; 38,pp. 1, 4R2-005-V-Z45/19/20103-4Gray-black very fine fine silt, tracesof fine gravel, few rootlets, slightsheen, hydrocarbon odor97.269,800PCB-1248 (AROCLOR 1248)2.86810.01.0Ref. 9, pp. 63, 95, 222, 320, 442, 573, 831-836,4247, 4274; 13, pp. 74, 75, 80, 85; 30, pp. 31; 38,pp. 1, 4R2-007-V-Z25/19/20101-2Brown-gray very fine silt, traces ofrootlets10058,300PCB-1248 (AROCLOR 1248)2.1685.00.51Ref. 9, pp. 64, 99, 222, 320, 445, 573, 831-836,4878, 4975; 13, pp. 74, 76, 81, 82; 30, pp. 31; 38,pp. 1, 4R2-007-V-Z35/19/20102-3Gray-black gray very fine silt, fewrootlets, slight hydrocarbon odor,traces of fine gravel99.8136,000PCB-1248 (AROCLOR 1248)227150.05.7Ref. 9, pp. 64, 99, 222, 320, 445, 573, 831-836,4879, 4976; 13, pp. 74, 76, 83, 84; 30, pp. 31; 38,pp. 1, 5R2-008-V-Z25/19/20101-2Gray-brown very soft wet silt, fewrootlets98.957,400PCB-1248 (AROCLOR 1248)0.87631.00.089Ref. 9, pp. 64, 101, 222, 320, 446, 573, 798-804,4885, 4982; 13, pp. 39, 42, 47; 30, pp. 31; 38, pp.1, 5R2-009-V-Z25/19/20101-2Gray-brown soft wet silt, fewrootlets, fine gravel98.954,300PCB-1248 (AROCLOR 1248)0.59661.00.097Ref. 9, pp. 64, 101, 222, 320, 447, 573, 779-785,4892, 4989; 13, pp. 56, 59, 62; 30, pp. 32; 38, pp.1, 5R2-009-V-Z35/19/20102-3Gray-black silt, mildly firm, fewrootlets, wood pulp97.299,700PCB-1248 (AROCLOR 1248)4.66910.01.1Ref. 9, pp. 64, 101, 222, 320, 447, 573, 779-785,5068, 5272; 13, pp. 56, 59, 63, 64; 30, pp. 32; 38,pp. 1,5R2-011-V-Z1a5/25/20100-0.5Brown silt, wet low density, traces offine sand, few organics94.932,000***PCB-1248 (AROCLOR 1248)0.38641.00.091Ref. 9, pp. 65, 105, 320, 450, 577, 862-869, 5609,5745; 13, pp. 115, 120, 122; 30, pp. 32; 38, pp. 1,5R2-013-V-Z1a5/25/20100-0.5Brown wet loose fine silt, traces offine sand, few organics, low density91.9***53,000***PCB-1248 (AROCLOR 1248)0.59701.00.11Ref. 9, pp. 66, 109, 320, 452, 577, 855-861, 5834,5976; 13, pp. 94, 97, 99; 30, pp. 32; 38, pp. 1, 5R2-013-V-Z1b5/25/20100.5-1Brown wet loose fine silt, traces offine sand, few organics, low density91.9***53,000***PCB-1248 (AROCLOR 1248)1.9891.00.3Ref. 9, pp. 66, 109, 320, 452, 577, 855-861, 5834,5976; 13, pp. 94, 98, 100; 30, pp. 32; 38, pp. 1, 5R2-015-V-Z35/25/20102-3Brown wet loose fine silt, traces offine sand91.8131,000PCB-1248 (AROCLOR 1248)6.56910.01.1Ref. 9, pp. 66, 113, 222, 320, 321, 454, 577, 904-909, 6068, 6165; 13, pp. 133, 136, 139, 140; 30,pp. 32; 38, pp. 1, 5Notes:ft bgs = feet below ground surfaceTOC = total organic carbonmg/kg = milligrams per kilogramSQL = sample quantitation limit = adjusted CRQL as defined in CLP Statement of Work SOM01.2 [Ref. 1, pp. 51586, 51589; 11, pp. 62, 111-113].J - The analyte was positively identified-the associated numerical value is the approximate concentration of the analyte in the sample [Ref. 27, p. 6; 30, pp. 3-4]N - The analysis indicates the presence of an analyte that has been "tentatively identified," and the associated numerical value represents its approximate concentration [Ref. 30 p. 3].U - The substance or analyte was analyzed for, but no quantifiable concentration was found at or above the CRQL [Ref. 27, p. 6; 30, pp. 3-4]* - Grain size (% fines) = particle size less than 75-μm [Ref. 34, p. 1]** - All estimated results were adjusted for unknown bias in accordance with "Using Qualified Data to Document and Observed Release and Observed Contamination" [Ref. 27, pp. 4-8, 14, 16, 18]*** - Result for total depthBoldindicates maximum background levelsN/A = not availablePage 4 of 4

### SD-Hazardous Waste Quantity

Source No.: 1

2.4.2 Hazardous Waste Quantity

2.4.2.1.1 Hazardous Constituent Quantity

The information available is not sufficient to evaluate Tier A source hazardous waste quantity; therefore, hazardous constituent quantity is not scored (NS).

Hazardous Constituent Quantity (C) Value: NS

2.4.2.1.2 Hazardous Wastestream Quantity

The information available is not sufficient to evaluate Tier B source hazardous waste quantity; therefore, hazardous wastestream quantity is not scored.

Hazardous Wastestream Quantity (W) Value: NS

2.4.2.1.3 Volume

Analytical results show that contaminated sediments are located throughout Eighteenmile Creek [see Sections 2.2.1 and 2.4.1]. However, the total volume of PCB-contaminated sedi ments is unknown. Therefore, the volume of contaminated sediments is considered to be greater than 0 (>0) cubic yards. The source type is ‘Other,’ so the volume value is divided by 2.5 to obtain the assigned value, as shown below [Ref. 1, p. 51591 (Section 2. 4.2.1.3, Table 2-5)].

Dimension of source (yd 3 

### ): >0 yd 3


### Volume (V) Assigned Value: (>0)/2.5 = >0

2.4.2.1.4 Area

Tier D is not evaluated for source type “other” [R ef. 1, p. 51591 (Table 2-5, Section 2.4.2.1.4)].

Area of source (ft 2 

### ): N/A Area (A) Assigned Value: 0

2.4.2.1.5 Source Hazardous Waste Quantity Value

The source hazardous waste quantity value for Source 1 is >0 for Tier C - Volume [Ref. 1, p. 51591].

Source Hazardous Waste Quantity Value: >0

32

### SD-Summary

SITE SUMMARY OF SOURCE DESCRIPTIONS

Containment

Source

Source Hazardous Waste

Number Quantity Value Ground

Water Surface

Water Gas Air

P articulate

1 >0 NS 10 * NS NS

NS = Not Scored

* The overland flow containment factor is 10 for the source [see Section 2.2.1].

33

### SWOF-Surface Water Overland Flow/Flood Migration Pathway

4.1 OVERLAND/FLOOD MIGRATION COMPONENT

4.1.1.1 Definition of Hazardous Substance Mi gration Path for Overland/Flood Component

The headwaters of Eighteenmile Creek originate southeast of Lockport in the Niagara County Park and Golf Course and flow aboveground to the west for approximately 1 mile, where they enter an underground pipe on the east side of Lockport [Ref. 7, p. 65; 28, pp. 6, 7, 21]. The creek th en flows northwest under Lockport for approximately 3⁄4 mile, where it empties into a sluice located just southeast of the NYS BC and just southwest of the Mill Street Bridge [Ref. 7, p. 65; 28, pp. 6, 19, 20]. Water from the NYSBC is discharg ed through the Hall Spillway and flows east into the sluice [Ref. 28, pp. 6, 19]. The headwaters of Eighteenmile Cr eek and NYSBC waters combine in the sluice and flow through Culvert No. 125 under the NYSBC, exiting on the north side of the NYSBC and forming what is referred to as the East Branch of Eighteenmile Creek [Ref. 5, p. 69; 28, pp. 6, 13, 14, 19]. The East Branch associated with the headwaters of Eighteenmile Creek is not the same stream as East Branch, a tributary of Eighteenmile Creek entering the creek just south of Newfane, New York, approximately 4 miles downstream of the headwaters [Ref. 4, p. 1]. The West Branch of Eighteenmile Creek originates in Upson Park at the dry doc k on the north side of the NYSBC, and also receives water from two underground flows from the south and southwest [Ref. 5, p. 69; 28, pp. 5, 17, 18]. Waters from the East and West Branches converge on the south side of Clinton Street and flow under Clinton Street to the Mill Pond (which is the result of Clinton Street Dam) [Ref. 5, p. 69, 182-184; 7, p. 24; 8, p. 68]. Eighteenmile Creek flows north for approximately 15 miles and discharges to Lake Ontario in Olcott, New York [Ref. 7, p. 24; 9, p. 13, 319].

The Eighteenmile Creek site is scored by the following approach:

The threats being evaluated are the Surface Water Pa thway Human Food Chain and Environmental Threats.

An observed release by chemical analysis is docum ented throughout Eighteenmile Creek, and the hazardous substances present include PCBs [see Section 2.2].

Since the source is contaminated sediments in the wate rway with discernable flow, the 15-Mile Surface water Pathway begins at the most upstream sediment sample documenting observed release [Ref. 1, p. 51605].

The known zone of contamination extends from the Eighteenmile Creek Corridor in Lockport (farthest upstream sample: 18MC-L03W-S01-Z1 indicated PCB Aroclor 1248 det ected at 0.73 mg/kg) to just south of the Burt Dam fishery (farthest downstream sample: R2-001-V-Z3 indicated PCB Aroclor 1248 detected at 2.5 mg/kg) [Tables 1 and 2; Ref. 7, p. 116; 9, p. 89; 13, pp. 16, 20; 15, p. 49, 140; 23, p. 1; 24, pp. 1, 2; 25, p. 1]. The sample locations are shown on Figures 2A and 2E.

Targets subject to actual contamination include wetlands and the Eighteenmile Creek fishery at Ide Road in Town of Newfane [Sections 4.1.3.3 and 4.1.4.3], and targets subject to potential contamination include the Eighteenmile Creek fishery at Fisherman’s Park and significant coastal fish and wildlife habitat downstream of Burt Dam [Section 4.1.4.3].

34

### SWOF-Observed Release

4.1.2.1 Likelihood of Release

4.1.2.1.1 Observed Release

Direct Observation

An observed release by direct observation is not being scored.

Chemical Analysis

An observed release by chemical analysis is documente d in Eighteenmile Creek between the Eighteenmile Creek Corridor in Lockport (farthest upstream sample: 18MC-L03-S01- Z1 indicated PCB Aroclor 1248 detected at 0.73 mg/kg) to just south of the Burt Dam fishery (farthest downstream sample: R2-001-V-Z3 indicated PCB Aroclor 1248 detected at

2.5 mg/kg) [Tables 1 and 2; Ref. 7, p. 116; 9, p. 89; 13, pp. 15, 16, 19, 20; 15, p. 49, 140; 23, p. 1]. The sample locations are shown on Figures 2A through 2E [see Section 2.2].

Attribution

Sediments in Eighteenmile Creek are contaminated with P CBs, copper, lead, zinc, and benzo(a)pyrene for a length of approximately 12.71 miles [see Section 2.2]. The origin of these hazardous substances in the contaminated sediments has not been identified due to the presence of multiple possibl e sources [Ref. 42, pp. 8, 72] . There are numerous routes that contamination can be taking to reach the water body and underlying sediments, including spillage during product shipping and handling, direct disposal and discharge, storm wa ter runoff, and air deposition. As a result, the source(s) of all the contamination in any particular location in the creek cannot be determined. EPA considers any upland properties contributing to the sediment contamination observed in Ei ghteenmile Creek as a “possible source”. After extensive NYSDEC and EPA investigations, including Remedial Investigation and supplemental sampling, the specific sources of contaminants in Eighteenmile Creek have not been defined [Ref. 9, pp. 13-16; 42, pp. 8, 72]. EPA considers these activities equivalent to a multi-stage Expanded Site Inspection (ESI).

The contaminants detected in the creek sediments can come from a wide variety of industrial and other anthropogenic

activities. Potential sources and conduits of contaminants to Eighteenmile Creek have been identified as industrial and municipal wastewater discharges, CSOs, inactive hazardous waste sites, the New York Barge Canal discharge, contaminated sediments already present in the creek, and others [Ref. 9, p. 14]. For instance, CSOs and storm water runoff are major contributors of PCBs, copper, lead, zinc, and other pollutants, with a variety of contaminated properties or facilities as the likely contributors to those waste stream s [Ref. 6, pp. 29, 43, 100, 102, 105]. NYSDEC and EPA have identified several potential contamination sources of hazardous substances in the Eighteenmile Creek watershed [Ref. 7, pp. 16-29]. As discussed below, there are numerous possibl e contributors to the sediment contamination observed in Eighteenmile Creek sediments.

While these facilities or properties are thought to be cont ributing to the contamination in the creek, they have not been identified definitively as such and are not thought to be the only sources of contamination. Previous investigations by NYSDEC – brief descriptions of the fac ilities and associated investigations are provided below:

Former Flintkote Plant Property:

The Former Flintkote Plant property is located at 198, 225, and 300 Mill Street, Lockport, Niagara County, New York [Ref. 5, p. 25; 7, p. 27]. The Beckman Dawson Roof ing Company purchased the Flintkote property in 1928 and manufactured felt and felt products [Ref. 5, p. 25; 7, p. 27]. Production of sound-deadening and tufting felt for use in automobiles began at Flintkote in 1935 and continued un til operations ceased and the plant closed in December 1971

35

### SWOF-Observed Release

[Ref. 5, p. 25; 7, p. 27]. In addition to felt, composite lami nates are suspected to have been manufactured at Flintkote, as they have been observed at the southernmost demolished bu ilding on the 198 Mill Street Property [Ref. 5, pp. 24-25; Ref. 7, p. 26]. A portion of the Flintkote property at 300 Mill Street near William Street was formerly listed as “Site No. 932072” in the Registry of Inactive Hazardous Waste Disposal Sites in New York State (NYS) with a classification code of 3 because of seven drums containing sweepings, solid ma terials and polychlorinated biphenyl (PCB) transformer oil that were stored in the basement of a building on site [Ref. 5, p. 25] . These drums were removed from the property by a waste oil processor in January 1984, and the “site” was removed from the Registry in 1985 [Ref. 5, p. 25] . In 1989, various drums containing chemicals were found at locations throughout the buildings at 300 Mill Street with 28 of these drums containing hazardous wastes [Ref. 5, p. 25] . These drums were disposed of off-site in May 1991 during a

NYSDEC drum removal action [Ref. 5, p. 25; Ref. 7, p. 27] . The Former Flintkote Plant property is currently vacant and in disrepair [Ref. 5, p. 24]

. A Site Investigation completed by the NYSDEC at the Former Flintkote Plant property during November and December 1999 revealed the presence of a consequential amount of hazardous waste (D008-lead) present on the property [Ref. 41, pp. 7, 32]. The NYSDE C concluded that the property should be included on the NYSDEC Registry of Inactive Hazardous Waste Disposal S ites in New York State and that Niagara County should continue to restrict access to the property [Ref. 41, pp. 7, 32].

In 2005, the NYSDEC completed a Remedial Investigation (RI) at the Eighteenmile Creek Corridor to better define the nature and extent of sediment contamination in Eighteenmile Creek [Ref. 5, p. 10]. An objective of the RI included an investigation of potential sources of contaminants to the cr eek, including the Former Flintkote Plant Property [Ref. 5, pp. 10, 69]. In March 2006, the NYSDEC issued a Record of D ecision (ROD) for the Former Flintkote Plant Property [Ref. 5, p. 26; 40, pp. 1-53]. Data collected from October 1995 through October 2003 at the Former Flintkote Plant Property is summarized in the ROD; the data indicates the presence of PCBs, SVOCs including benz o(a)pyrene, and inorganics including copper, lead, and zinc in a variety of matrices, including PCBs up to 108 mg/kg in sediment samples collected from buildings [Ref. 40 pp. 26–32].

A Supplemental Remedial Investigation was completed in Ju ly 2009 to further evaluate sediment contamination in Eighteenmile Creek and to determine the vertical and lateral extent of contamination in properties adjacent to the creek [Ref. 7, p. 16]. A total of 22 sediment samples (and one dupl icate) were collected along seven transects established along the Eighteenmile Creek adjacent to the Former Flintkote Plan t property [Ref. 7, pp. 17, 95]. The highest detection of PCBs in sediment of Eighteenmile Creek were found adj acent to the Former Flintkote Plant at 237 mg/kg; more specifically, in sample 18MC-L14E-S02-Z1, Aroclor 1248 was detected at 180 mg/kg and Ar oclor 1254 was detected at 57 mg/kg [Table 1; Ref. 7, pp. 65, 95, 126, 127]. Detections of benzo(a)pyrene in the sediment samples adjacent to the former Flintkote Plant Property, ranged from an estimated concentration of 0.28 mg/kg to 34 mg/kg, and the highest detections of copper, lead, and zinc in these samples were copper an estimated concentration of 6,830 mg/kg, lead at 3,990 mg/kg, and zinc at an estimated concentr ation of 7,340 mg/kg [Ref. 7, pp. 124-127, 130].

Former United Paperboard Company Property:

The Former United Paperboard Company Property is approxima tely 4.8 acres in size and is located at 62 and 70 Mill Street, Lockport, Niagara County, New York [Ref. 5, pp. 30- 31; Ref. 7, p. 25]. The Jackson Lumber Company owned and operated at the 62 Mill Street United Paperboard propert y in the late 1880s and early 1890s [Ref. 7, p. 26]. A warehouse building was designated as the Saw Mill and Sash & Blind Manufacturing [Ref. 7, p. 26]. Sash & Blind added a pulp mill and box facility to its operations in 1892 [Ref . 7, p. 26]. By 1898 the lumber company had shut down their operations and the area previously occupied by Sash & Blind became the Traders’ Paper Company paper mill, which became United Box Board and Paper Company in 1903 [R ef. 7, p. 26]. The 70 Mill Street United Paperboard property was owned by United Box Board Company in 1909 [Ref . 7, p. 26]. United Box Board Company became United Paper Board Company in 1914, which changed its name to United Paperboard Company in 1928, which then became United Board’s Carton Corporation in 1948 and Beaverboard Company, Inc., in 1969 [Ref. 7, p. 26]. By 1969 the buildings had been vacated and dismantled [Ref. 7, p. 26]. The property is occupied by Duraline Abrasives, Inc., owned by TriSide, LLC, and contains one warehouse build ing [Ref. 5, p. 31; Ref. 7, p. 25].

36

### SWOF-Observed Release

In 2005, the NYSDEC completed an RI at the Eighteenmile Cr eek Corridor to better define the nature and extent of sediment contamination in Eighteenmile Creek [Ref. 5, p. 10] . The investigation included an investigation of potential sources of contaminates to the creek, including the Former United Paperboard Company Property [Ref. 5, pp. 10, 69]. The RI included the following activities: property inspection, completion of soil boring and test pit program, and collection of environmental samples for chemical analysis [Ref. 5, pp. 20-22]. During the property inspection of the Former United Paperboard Company Property, extensive ash fill was observed [Ref. 5, p. 51]. Five soil borings and three test pits were completed at the Former United Paper board Company Property [Ref. 5, pp. 35, 69, 70]. Five surface and seven subsurface soil and fill samples were collected from the Former United Paperboard Company Property [Ref. 5, pp. 51, 72]. The surface soil samples were analyzed for PCBs and select metals and the subsurface soil samples were analyzed for PCBs, select metals, and SVOCs [Ref. 5, pp. 51] . The analytical results i ndicated the presence of PCBs, benzo(a)pyrene, copper, lead, and zinc [Ref. 5, pp. 156-159].

A Supplemental Remedial Investigation was completed in July 2009 in order to further evaluate sediment contamination the Eighteenmile Creek and to determine the vertical and late ral extent of contamination in properties adjacent to the Creek [Ref. 7, p. 16]. A total of 21 surface soil samples a nd 37 subsurface soil samples were collected from the Former United Paperboard Company Property as well as 20 sediment samples collected along six transects established along the Eighteenmile Creek adjacent to the Former United Paperboard Company property [Ref. 7, pp. 17, 94, 99, 104]. Surface and subsurface soil samples all indicated the presence of PCBs , benzo(a)pyrene, copper, lead, and zinc [Ref. 7, pp. 138­ 141, 167-173]. Sediment samples collected along Eighteenm ile Creek adjacent to the Former United Paperboard Company Property indicate the presence of total PCBs ra nging from 0.04 mg/kg to 61 mg/kg; benzo(a)pyrene ranging from non-detect to 7.1 mg/kg; and elevated detections of copper, lead, and zinc at 54,900 mg/kg, 15,000 mg/kg, and 21,400 mg/kg, respectively [Ref. 7, pp. 94, 120-123, 130].

Upson Park:

Upson Park is listed as a town park and it consists of 5.9 acres of land owned by the City of Lockport [Ref. 7, p. 24]. The park is located at 100 Clinton Street, Lockport, Niagara County, New York [Ref. 5, pp. 31-32; Ref. 7, p. 24]. A canal boat building company operated on this property from the mid 1880s until no later than 1892 [Ref. 5, p. 32; Ref. 7,

p. 24]. A pulp mill operated on this property between 1919 and 1928; in 1914, the mill company name changed to the United Paper Board Company [Ref. 5, p. 32; Ref. 7, p. 24]. By 1948, operations at the mill had been shut down and the buildings on the property had been demolished by 1969 [Ref. 7, pp. 24-25].

In 2005, the NYSDEC completed a RI at the Eighteenmile Creek Corridor to better define the nature and extent of sediment contamination in Eighteenmile Creek [Ref. 5, p. 10] . The investigation included an investigation of potential

sources of contaminates to the creek. Potential sources i nvestigated included the Upson Park Property [Ref. 5, pp. 10, 69]. The RI included the following activities: property inspection, completion of soil boring and collection of environmental samples for chemical analysis [Ref. 5, pp. 20-22]. During the property inspection, fill material was observed on the Upson Park property [Ref. 5, p. 48]. Four surface and subsurface fill/soil samples were analyzed for PCBs, select metals, and SVOCs [Ref. 5, pp. 49, 69, 71]. The analytical results indi cated the presence of PCBs, benzo(a)pyrene, copper, lead, and zinc [Ref. 5, pp. 152, 153].

A Supplemental Remedial Investigation was completed in July 2009 in order to further evaluate sediment contamination the Eighteenmile Creek and to determine the vertical and late ral extent of contamination in properties adjacent to the Creek [Ref. 7, p. 16]. A total of 16 surface soil samples and 28 subsurface soil samples were collected from the Upson Park property as well as 24 sediment samples (and one dupli cate) collected along five transects established along the Eighteenmile Creek adjacent to the Upson Park property [Ref. 7, pp. 17, 92, 97, 102]. Su rface soil samples indicated the presence of PCBs, benzo(a)pyrene, coppe r, lead, and zinc; subsurface soil samp les indicated the presence of PCBs, copper, lead, and zinc [Ref. 7, pp. 135, 136, 141, 161, 162, 173]. Sediment sa mples collected along Eighteenmile Creek adjacent to the Upson Park property indicate the presen ce of: total PCBs ranging from non-detect to 0.73 mg/kg; benzo(a)pyrene ranging from estimated concentrations of 0.024J mg/kg to 1.2J mg/kg; and detections of copper, lead, and zinc at 702 mg/kg, 1,660 mg/kg, and 1,300J mg /kg, respectively [Ref. 7, pp. 92, 114-117, 130].

37

### SWOF-Observed Release

Former White Transportation Property:

The Former White Transportation Property is approximately 2.6 acres in size and is located at 30-40 Mill Street, Lockport, Niagara County, New York [Ref. 5, p. 27; Ref. 7, p. 25]. There is a single-story concrete block building on the property, approximately 5,915 square feet in size, whic h was built in 1901 and had an addition to the western end completed in the early 1950s [Ref. 5, p. 27]. The building is currently vacant, but it was used in the recent past to store tractor-trailer trucks and equipment associated with former trucking operations [Ref. 5, p. 27]. Additionally, there were three trailers on the property: one locked trailer located near the front of the building facing Mill Street and two trailers near the bank of the East Branch of Eighteenmile Creek [Ref . 7, p. 25]. One of the trailers along the bank contained 55­ gallon drums, two of which were lying on the ground behind the trailer; trailers and drums were later removed from the property under the supervision of NYSDEC [Ref. 7, p. 25]. The northern portion of the White Transportation property operated as the New York Cotton Batting Company from at least 1909 until at least 1920, as the James O-Ring Company during the early 1940s, and as White Transportation from 1948 until the late 1990s when all operations on the property ceased [Ref. 5, p. 28; Ref. 7, p. 25]. It is unknown wh at operations took place on the northern property during the 1920s and the 1930s [Ref. 5, p. 28; Ref. 7, p. 25]. The southern portion of the subject property operated as the Niagara Paper Mill from at least 1875 until approximately 1898, as a box factor y by D.C. Graham in at least 1903, as a cold storage facility by L. Huston from at least 1903 until at least 1937, as the Lockport Leather Board Company from at least 1909 until no later than 1914, as the Simon William Brewery fro m at least 1940 to 1952; and White Transportation from 1952 until the late 1990s, when operations ceased [Ref. 5, p. 28; Ref. 7, p. 25].

In 2005, the NYSDEC completed a RI at the Eighteenmile Creek Corridor to better define the nature and extent of sediment contamination in Eighteenmile Creek [Ref. 5, p. 10] . The investigation included an investigation of potential sources of contaminants to the creek, including the Former White Transportation Property [Ref. 5, pp. 10, 69]. The RI included the following activities: property inspection, completion of soil borings, and collection of environmental samples for chemical analysis [Ref. 5, pp. 20-22, 50]. During the property inspection, extensive slag and cinder-fill was observed throughout the White Transportation property [Ref. 5, p. 50]. Subsurface soil samples were analyzed for PCBs, select metals, and SVOCs [Ref. 5, pp. 50, 69, 71]. Th e analytical results indicat ed the presence of PCBs, benzo(a)pyrene, copper, lead and zinc [Ref. 5, pp. 154, 155].

A Supplemental Remedial Investigation was completed in July 2009 in order to further evaluate sediment contamination the Eighteenmile Creek and to determine the vertical and late ral extent of contamination in properties adjacent to the Creek [Ref. 7, p. 16]. A total of eight surface soil samples and 21 subsurface soil samples were collected from the Former White Transportation as well as 11 sediment samp les collected along three transects established along the Eighteenmile Creek adjacent to the Former United Paperboard Company Property [Ref. 7, pp. 17, 93, 98, 103]. Surface and subsurface soil samples all indicated the presence of PCBs , benzo(a)pyrene, copper, lead, and zinc [Ref. 7, pp. 135, 136, 141, 163-166, 173]. Sediment samples collected al ong Eighteenmile Creek adjacent to the Former White Transportation property indicate the presence of total P CBs ranging from 0.0066 mg/kg to 3.8 mg/kg; benzo(a)pyrene ranging from an estimated concentration of 0.15J mg/kg to 2.7 mg/kg and detections of copper lead and zinc at 361 mg/kg, 807J mg/kg, and 5,190J mg/kg, re spectively [Ref. 7, pp. 93, 118-119, 130].

Sources on the NYSBC

The New York State Barge Canal (NYSBC; a.k.a. Erie Canal) is a manmade waterway that passes through the Eighteenmile Creek watershed in the City of Lockport [Ref. 6, p. 146]. Approximately 9 miles of the historic canal, which is laid out perpendicular to natural flow patterns a nd is fed by numerous tributaries, occur within the watershed [Ref. 6, pp. 85-86]. Water from the canal provided power for pul p mills, gristmills, tanneries, and sawmills in the City of Lockport during the 1800s [Ref. 6, p. 57]. The NYSBC curren tly provides important recreational land uses such as fishing, boating, and hiking opportunities [Ref. 6, p. 72] . During dry weather, the NYSBC provides an input of approximately 50 cubic feet per second (cfs) into Eighteenmile Creek through a spillway and sluice [Ref. 6, p. 146; 7, p. 24]. The canal is operated from early May to early November, at which time it is drawn down, temporarily increasing the inflow of water into Eighteenmile Creek [Ref. 6, p. 146].

38

### SWOF-Observed Release

An environmental database search shows dozens of possible pollution sources along the canal and within 1 mile of its confluence with Eighteenmile Creek [Ref. 33, pp. 1-37] . These possible pollution sources along the NYSBC are a suspected pollution source in the Eighteenmile Creek watershe d, in addition to industrial and municipal wastewater discharges, inactive hazardous waste sites, and CSOs [Ref . 6, pp. 29, 44; 33, pp. 1-37]. Water quality studies by NYSDEC in 1994 and 1995 reportedly indicated high levels of PCBs in the NYSBC [Ref. 6, p. 96]. An investigation by NYSDEC in 1999 suggested multiple possible sources of the contamination in Eighteenmile Creek, including the NYSBC and the Gulf Creek (a tributary into Eighteenmile Cr eek near Lockport) [Ref. 6, pp. 87, 177]. An April 2005 sediment sampling investigation indicated elevated leve ls of PCBs in the NYSBC downstream from the Eighteenmile Creek confluence [Ref. 6, p. 96]. CSOs in the City of Lockport discharge to the NYSBC and Eighteenmile Creek during periods of significant precipitation; six CSOs have the poten tial to discharge to Eighteenmile Creek, and seven others have the potential to discharge into the NYSBC [Ref. 8, pp. 19-20]. NYSDEC has investigated the New York State

Electric and Gas Substation at South Transit Street and Stat e Road in the City of Lockport as a possible source of contamination in the NYSBC [Ref. 7, p. 205].

Based on findings during recent investigations, NYSDEC ha s indicated that the NYSBC does not appear to be a significant current contributor of PCBs and metals to Eighteen mile Creek sediments [Ref. 7, pp. 19, 204; 8, pp. 56, 57]. Metal contaminant concentrations found in Eighteenmile Creek sediments are generally higher than those found in the NYSBC, indicating that there is one or more sources located downstream of the canal [Ref. 8, p. 50; 33, pp. 1-37]. The NYSDEC found low levels of suspended solids in barge water entering Eighteenmile Creek, indicating that solids transported from the NYSBC into Eighteenmile Creek are mo stly in the dissolved phase [Ref. 8, pp. 52-53]. Furthermore, NYSDEC concluded that the conditions (primarily evaporation and changes in pH) necessary for suspended solids to precipitate or adsorb to sediment in the Eighteenmile Creek Corridor do not exist [Ref. 8, p. 53].

39

### SWOF-Observed Release

Hazardous Substances Released:

PCBs [Aroclor-1242, Aroclor-1248, Aroclor-1254, and Aroclor-1260] Copper

Lead

Zinc Benzo(a)pyrene

[Tables 1 and 2]

=================================================================================== Observed Release Factor Value: 550

40

### SWOF/Food Chain-Waste Characteristics

4.1.3.2 Human Food Chain Threat - Waste Characteristics

4.1.3.2.1 Toxicity/Persistence/Bioaccumulation

Hazardous Substance Toxicity

Factor

Value River

Persistence

Factor Value Food Chain

Bioaccumulation

Factor Value* Toxicity/Persistence/

Bioaccumulation Factor Value (Table 4-16) Ref. 2 Page PCBs [Aroclor-1242,Aroclor-1248, Aroclor1254, and Aroclor-1260] 10,000 1 50,000 5 x 10 8 

### BI-10

Copper 0 1 500 0 BI-3

Lead 10,000 1 5 5 x 10 4 

### BI-8

Zinc 10 1 5 50 BI-12 Benzo(a)pyrene 10,000 1 50,000 5 x 10 8 

### BI-2

* Fresh water value.

PCBs and benzo(a)pyrene are the hazardous substances associated with the highe st toxicity/persistence/bioaccumulation factor value with a quantity of 5 x 10 8 

### . PCBs were manufactured as a mixt ure of various PCB congeners through a chlorination process aimed at achieving a certain percentage of chlorine [Ref. 39, p. 1]. Mixtures with higher percentages of chlorine contain higher proportions of the mo re heavily chlorinated congeners; however, all congeners are expected to be present at some leve l in all mixtures [Ref. 39, p. 1].

41

### SWOF/Food Chain-Waste Characteristics

4.1.3.2.2 Hazardous Waste Quantity

Source Number Source Hazardous Waste Quantity Value (HRS Section 2.4.2.1.5) Is source hazardous constituent quantity data complete? (yes/no)

1 >0 no

Sum of Values: 1 (rounded to 1 as specified in HRS Section 2.4.2.2)

The sum corresponds to a hazardous waste quantity factor va lue of 1 in Table 2-6 of the HRS [Ref. 1, p. 51591]. However, the HRS states that if any target is subject to Level I or Level II concentrations, assign either the value from Table 2-6 or a value of 100, whichever is greater, as the h azardous waste quantity factor value for that pathway [Ref. 1,

p. 51592]. Therefore, a hazardous waste quantity factor value of 100 is assigned for the surface water pathway [Ref. 1, p. 51591-51592].

4.1.3.2.3 Waste Characteristics Factor Category Value

Hazardous substances [PCBs and benzo(a)pyrene] associated with the waste source, which has a surface water pathway containment factor greater than 0 for the watershed, corre sponds to a Toxicity/Persistence Factor Value of 10,000 and Bioaccumulation Potential Factor Value of 50,000, as shown previously [Ref. 1, pp. 51618, 51620; 2, pp. BI-2, BI-10].

(Toxicity/Persistence Factor Va lue) x (Hazardous Waste Quantity Factor Value) = 10,000 x 100 = 1 x 10 6



### (Toxicity/Persistence Factor Value x H azardous Waste Quantity Factor Value) x (Bioaccumulation Potential Factor Value) = (1 x 10 6 

### ) x (50,000) = 5 x 10 10



### The product corresponds to a Waste Characteristics Factor Cate gory Value of 320 in Table 2-7 of the HRS [Ref. 1, p. 51592].

=================================================================================== Toxicity/Persistence/Bioaccumu lation Factor Value: 5 x 10 8


### Hazardous Waste Quantity Factor Value: 100 Waste Characteristics Factor Category Value: 320

42

### SWOF/Food Chain-Targets/Food Chain Individual

4.1.3.3 Human Food Chain Threat - Targets

Eighteenmile Creek at Ide Road in the Town of Newfane (i.e ., within the documented zone of contamination) is fished for human consumption [Ref. 28, p. 11; 35, p. 1]. Therefore, Actual Contamination is documented, and the target fishery

is evaluated for Actual Human Food Chain Contamination. There are no media-specific benchmarks for sediment, so the target fishery is subject to Level II concentrations [Ref. 1, pp. 51592-51593, 51620-51621; 36, pp. 5, 29]. Fisherman’s Park just downstream of Burt Dam is a major fishery wher e several species of fish, including steelhead trout, salmon, walleye, perch and northern pike are caught for consumption [Ref . 23, p. 1]. This target fishery is subject to potential contamination [Ref. 1, pp. 51592-51593, 51620-51621; 23, p. 1].

Sediment Samples for Observed Release Note: The sediment sample showing the maximum PCB concentration is used to demonstrate the observed release.

Bioaccumulation

Sample ID Distance

from PPE* Hazardous

Substance Potential

Factor Value Reference(s)

18MC-L03W-S0 1-Z1 0 feet PCBs [Aroclor- 124 8] 50,000 Figure 2A; Table 2; Ref. 1,pp. 51605, 51620; 2, p. BI10

*The target distance limit is measured from the farthest upstream sediment sample that meets the criteria for an observed release [Ref. 1, p. 51605].

4.1.3.3.1 Food Chain Individual

Sample ID: R-2-001-V-Z3

Hazardous Substance: PCBs Bioaccumulation Potential: 50,000

References: Figure 2E; Ref. 1, p. 51620; 2, p. BI-10; 9, p. 89; 13, p. 16, 20

Type of Dilution Identity of Fishery Surface Water Body Weight Reference(s)

Ide Road Fishery Moderate to large stream 0.01 1, p. 51613; 12, p. 1 (fresh water)

There is an observed release of hazardous substances, including PCBs and benzo(a)pyrene, with Bioaccumulation Potential Factor Values of 500 or greater, and there is Level II Actual Contamination of the Ide Road fishery located in the Town of Newfane [Ref. 1, pp. 51592-51593, 51620; 2, pp. BI-2 , BI-10; 28, p. 11; 35, p. 1]. Therefore, a Food Chain

Individual Factor Value of 45 is assigned [Ref. 1, p. 51620].

=================================================================================== Food Chain Individual Factor Value: 45

43

### SWOF/Food Chain-Level I/Level II Con centrations/Potential Contamination

4.1.3.3.2 Population

4.1.3.3.2.1 Level I Concentrations

There are no media-specific benchmarks for sediment. Therefor e, there are no fisheries subject to Level I concentrations

and the Level I Concentrations Factor Value is 0 [Ref. 1, pp. 51592-51593, 51620-51621].

=================================================================================== Level I Concentrations Factor Value: 0

4.1.3.3.2.2 Level II Concentrations

People fish for consumption from the Ide Road fishery located at Ide Road in Newfane, New York [Ref. 28, p. 11; 35, p. 1]. The fish consumption rate for the fishery is not documente d, so the fishery is assigned to the category “Greater than 0 to 100 pounds per year” [Ref. 1, p. 51621; 35, p. 1; 36, pp. 5, 29]. The category corresponds to the assigned Human Food Chain Population Value of 0.03 in Table 4-18 of the HRS, which is assigned as the Level II Concentrations Factor Value [Ref. 1, p. 51621].

=================================================================================== Level II Concentrations Factor Value: 0.03

4.1.3.3.2.3 Potential Human Food Chain Contamination

People catch fish for consumption from Fisherman’s Park just downstream of the zone of contamination [Ref. 23, p. 1]. The fish consumption rate for the downstream fishery docum ented to be over 1,000 pounds per year, so the fishery is assigned to the category “Greater than 1,000 to 10,000 pounds per year” , which corresponds to the assigned Human Food Chain Population Value of 3 in Ta ble 4-18 of the HRS [Ref. 1, p. 51621].

Annual Type of

Surface Average

Annual Identity of Fishery Production (pounds) Water Body Flow (cfs) Population Value (P i 

### ) Dilution Weight (D i 

### ) P i 

### x D i



### Burt Dam/

Fisherman’s Park 1,000-10,000 Moderate to large stream 100-1,000 3 0.01 0.03

Sum of P i 

### x D i 

### : 0.03 (Sum of P i 

### x D i 

### )/10: 0.003

[Figures 1, 2; Ref. 12, p. 1; 23, p. 1]

=================================================================================== Potential Human Food Chain Contamination Factor Value: 0.003

44

### SWOF/Environment-Waste Characteristics

4.1.4.2 Environmental Threat - Waste Characteristics

4.1.4.2.1 Ecosystem Toxicity/Persistence/Bioaccumulation

Hazardous Substance Ecotoxicity

Factor

Value* River

Persistence

Factor Value Environment

Bioaccumulation

Factor Value* Ecotoxicity/Persistence/

Bioaccumulation Factor

Value (Table 4-21)* Ref. 2 Page PCBs [Aroclor-1242,Aroclor-1248, Aroclor1254, and Aroclor-1260] 10,000 1 50,000 5 x 10 8 

### BI-10

Copper 1,000 1 5,000 5 x 10 6 

### BI-3

Lead 1,000 1 50,000 5 x 10 7 

### BI-8

Zinc 10 1 50,000 5 x 10 5 

### BI-12 Benzo(a)pyrene 10,000 1 50,000 5 x 10 8 

### BI-2

* Fresh water values

PCBs and benzo(a)pyrene are the hazardous substances a ssociated with the highest ecotoxicity/persistence/ bioaccumulation factor value with a quantity of 5 x 10 8 

### . PCBs were manufactured as a mixture of various PCB congeners through a chlorination process aimed at achieving a certa in percentage of chlorine [Ref. 39, p. 1]. Mixtures with higher percentages of chlorine contain higher proportions of the more heavily chlorinated congeners; however, all congeners are expected to be present at so me level in all mixtures [Ref. 39, p. 1].

=====================================================================================

= Ecosystem Toxicity/Persistence/Bio accumulation Factor Value: 5 x 10 8



### 45

### SWOF/Environment-Waste Characteristics

4.1.4.2.2 Hazardous Waste Quantity

Source Number Source Hazardous Waste Quantity Value (HRS Section 2.4.2.1.5) Is source hazardous constituent quantity data complete? (yes/no)

1 >0 no

Sum of Values: 1 (rounded to 1 as specified in HRS Section 2.4.2.2)

The sum corresponds to a hazardous waste quantity factor va lue of 1 in Table 2-6 of the HRS [Ref. 1, p. 51591]. However, the HRS states that if any target is subject to Level I or Level II concentrations, assign either the value from Table 2-6 or a value of 100, whichever is greater, as the h azardous waste quantity factor value for that pathway [Ref. 1,

p. 51592]. Therefore, a hazardous waste qua ntity factor value of 100 is assigned for the surface water pathway [Ref. 1, p. 51591-51592].

4.1.4.2.3 Waste Characteristics Factor Category Value

Hazardous substances [PCBs and benzo(a)pyrene] associated with the waste source, which has a surface water pathway containment factor greater than 0 for the watershed, corre sponds to an Ecotoxicity/Persistence Factor Value of 10,000 and Bioaccumulation Potential Factor Value of 50,000, as s hown previously [Ref. 1, pp. 51618, 51620; 2, pp. BI-2, BI10].

(Ecotoxicity/Persistence Factor Value) x (Hazardous Waste Quantity Factor Value) = 10,000 x 100 = 1 x 10 6



### (Ecotoxicity/Persistence Factor Value x Hazardous Waste Quantity Factor Value) x (Bioaccumulation Potential Factor Value) = (1 x 10 6 

### ) x (50,000) = 5 x 10 10



### The product corresponds to a Waste Characteristics Factor Cate gory Value of 320 in Table 2-7 of the HRS [Ref. 1, p. 51592].

================================================================= ==================== Hazardous Waste Quantity Factor Value: 100 Waste Characteristics Factor Category Value: 320

46

### SWOF/Environment-Targets

4.1.4.3 Environmental Threat - Targets

There are several HRS-eligible wetlands along the contaminated portion of Eighteenmile Creek [Ref. 1, p. 51625; 7, p. 228; 32, pp. 1-3]. Therefore, Actual Contamination is doc umented, and the target sensitive environment (i.e., wetland frontage) is evaluated for Actual Contamination [Ref. 1, p. 51625]. There are no media-specific benchmarks for sediment, so the target sensitive environment is subj ect to Level II concentrations [Ref. 1, pp. 51592-51593, 51624­ 51625].

Sediment Samples for Observed Release Note: The sample that showed the maximum PCB concentration is listed.

Bioaccumulation

Sample ID Distance

from PPE Hazardous

Substance Potential

Factor Value Reference(s)

18MC-L14E-S02-Z1 2125 feet PCBs [Aroclor- 1248] 50,000 Figure 2A; Table 1; Ref. 1,pp. 51613, 51625; 2, p. BI10; 7, p. 126

The maximum factor value of 50,000 app lies to PCBs [Ref. 2, p. BI-10].

47

### SWOF/Environment-Level I/Level II Concentrations

4.1.4.3.1 Sensitive Environments

4.1.4.3.1.1 Level I Concentrations

There are no media-specific benchmarks for sediment. Theref ore, there are no sensitive environments subject to Level I

concentrations and the Level I Concentrations Factor Value is 0 [Ref. 1, pp. 51592-51593, 51624-51625].

================================================================================== Level I Concentrations Factor Value: 0

4.1.4.3.1.2 Level II Concentrations

Sensitive Environments

The zone of contamination within Eighteenmile Creek is not known to contain any sensitive environments (e.g., endangered species habitats) other than wetlands [Ref. 1, pp. 51624-51625; 6, pp. 146; 7, pp. 66, 221-222, 228; 32, p. 3].

Sensitive Environment Distance from PPE

to Sensitive

Environment Reference Sensitive

Environment Value(s)

None N/A 1, pp. 51624-51625 0

Sum of Sensitive Environments Value: 0

Wetlands

Wetland Wetland Frontage Reference(s)

HRS-Eligible Wetlands 3.33 miles (e stimate) 1, p. 51625; 32, pp. 1-3

Total Wetland Frontage: 3.33 mile

Wetland Value: 100

Sum of Sensitive Environments Value + Wetland Value: 100

======================================================================== ============

Level II Concentrations Factor Value: 100

48

### SWOF/Environment-Potential Contamination

4.1.4.3.1.3 Potential Contamination

Since a maximum score of 100.00 was achieved for the surface water migration pathway, the Potential Contamination Factor Value was not scored (NS). However, there are dow nstream targets subject to Potential Contamination. The reach of Eighteenmile Creek between Burt Dam and the Route 18 bridge in Olcott, New York, near Lake Ontario (i.e., downstream of the zone of contamination) is classified as a significant coastal fish and wildlife habitat [Ref. 4, p. 2; 37,

p. 1]. Fisherman’s Park, located within Eighteenmile Creek ju st downstream of Burt Dam, is a major recreational fishing destination where species of fish including steelhead trout , salmon, walleye, perch, and northern pike are caught and consumed [Figure 1; Figure 2E; Re f. 23, p. 1; 36, pp. 5, 29].

================================================================================== Potential Contamination Factor Value: NS

49