:as: halliburton nus a r i n n n o · project no. 3620-33 epa dsn md-181 facility id no....

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DRAFT OR'G'NAlHAZARD RANKING SYSTEM <**»

SAUER DUMP

EPA WORK ASSIGNMENT NO. 37-36-3JZZPROJECT NO. 3620-33

EPA DSN MD-181FACILITY ID NO. MDD981038334

ARCS III PROGRAMEPA CONTRACT NO. 68-W8-0037

SEPTEMBER 1995

:as: Halliburton NUS a R i n n n o( o K i> o K \ i i o \ A n I U U U U

1-8-5-10

DRAFTHAZARD RANKING SYSTEM

SAUER DUMP

EPA WORK ASSIGNMENT NO. 37-36-3JZZPROJECT NO. 3620-33

EPA DSN MD-181FACILITY ID NO. MDD981038334

HALLIBURTON NUS CORPORATIONARCS III PROGRAM

EPA CONTRACT NO. 68-W8-0037

FOR THEUNITED STATES ENVIRONMENTAL PROTECTION AGENCY

SEPTEMBER 21, 1995

SUBMITTED BY REVIEWED BY APPROVED BY

DONALD WHALEN TIMOTHY UNGRADY LEONARD JOHNSONSITE MANAGER HRS COORDINATOR PROGRAM MANAGER, ARCS III

MRS DOCUMENTATION RECORD - - REVIEW COVER SHEET ORIGINAL

(Red)

Name of Site: Sauer Dump

Contact Persons

Site Investigation: Michael Taurino (215) 597-3437(Name) (Telephone)

Documentation Record: Kevin Wood (215) 597-1110(Name) (Telephone)

Pathways, Components, or Threats Not Evaluated

The groundwater, groundwater to surface water component, soil exposure, and air migration pathways werenot evaluated because they are not expected to present a significant threat to human health or theenvironment.

WP51\ARCS\36203301\R-51-8-5-10 jj A R I 0 H Q Q 3

WORKSHEET FOR COMPUTING MRS SITE SCORE

1. Groundwater Migration Pathway Score (S )(from Table 3-1, line 13)

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

2b. Groundwater to Surface Water Migration Component(from Table 4-25, line 28)

2c. Surface Water Migration Pathway Score (Ssw)Enter the larger of lines 2a and 2b as the pathway score.

3. Soil Exposure Pathway Score (Ss)(from Table 5-1, line 22)

4. Air Migration Pathway Score (Sa)(from Table 6-1, line 12)

5. Total of Sgw2 + Ssw

2 + Ss2 + Sa

2

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

not evaluated

100

not evaluated

100

not evaluated

not evaluated

10,000

10,000

50

WP51 \ARCS\36203301 \R-51 -8-5-10 III A R I Q O O O I *

MRS DOCUMENTATION RECORD

Name of Site: Sauer Dump

EPA Region: III Date Prepared: September 25. 1995

Street Address of Site: 4225 Lynnhurst Road, Dundalk, Maryland

County and State: Baltimore County, Maryland

General Location in the State: Northeast

Topographic Map: Middle River

Latitude: 39° 16' 10" N Longitude: 76° 27' 08" W

Scores

Groundwater PathwaySurface Water PathwaySoil Exposure PathwayAir Pathway

MRS SITE SCORE

not evaluated100not evaluatednot evaluated

50

WP51 \ARCS\36203301\R-51-8-5-10 IV A R ! 0 H n C 5

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5^ "A"'s,'^ "Ah><-. ---MX3GE FOREST5 £•' ' 5 , - * * ^/S^.V-'-BO.HEVA.HrpL , .,

t? "'• 3 * 2 t ^v. ^?.i« = t ,.,. .

Site Name: Sauer Dump

TABLE 4-1SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET

FACTOR CATEGORIES AND FACTORS

LIKELIHOOD OF RELEASE MAXIMUM VALUEVALUE ASSIGNED

1 . Observed Release 550 550

2. Potential to Release by Overland Flow2a. Containment 10 02b. Runoff 25 02c. Distance to Surface Water 25 02d. Potential to Release by Overland Flow

[lines 2a x (2b + 2c)] 500 0

3. Potential to Release by Flood3a. Containment (Flood) 10 03b. Flood Frequency 50 03c. Potential to Release by Flood (lines 3a x 3b) 500 0

4. Potential to Release(lines 2d + 3c, subject to a maximum of 500) 500 0

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

WASTE CHARACTERISTICS

6. Toxicity/Persistence * 10,000

7. Hazardous Waste Quantity * 100

8. Waste Characteristics 100 32

TARGETS

9. Nearest Intake 50 0

1 0. Population10a. Level I Concentrations ** 010b. Level II Concentrations ** 010c. Potential Contamination ** 010d. Population (lines 10a + 1 0b + 10c) ** 0

1 1 . Resources 5 5

12. Targets (lines 9 + 10d + 11) ** 5

DRINKING WATER THREAT SCORE

13. Drinking Water Threat Score"*[(lines 5 x 8 x 12)/82,500, subject to a maximum of 100] 100 1 .07

a R ! n n n n 7WP51\ARCS\36203301\R-51-8-5-10 vj

M ' ' ' u "" ^

Site Name: Sauer Dump Site Score: 50

TABLE 4-1 (continued)SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET


HUMAN FOOD CHAIN THREAT MAXIMUM VALUEVALUE ASSIGNED

LIKELIHOOD OF RELEASE

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

WASTE CHARACTERISTICSQ

15. Toxicity/Persistence/Bioaccumulation * 5 x 1 0


17. Waste Characteristics 1,000 320

TARGETS

18. Food Chain Individual 50 20

19. Population19a. Level I Concentrations ** 019b. Level II Concentrations ** 019c. Potential Human Food Chain Contamination ** 0.34119d. Population (lines 19a + 19b + 19c) ** 0.341

20. Targets (lines 18 + 19d) " 20.341

HUMAN FOOD CHAIN THREAT SCORE

21. Human Food Chain Threat Score*** 100 43.39[(lines 14 x 17 x 20)/82,500, subject to a maximum of 100]

WP51\ARCS\36203301\R-51-8-5-10 vii F- p I f

Site Name: Sauer Dump Site Score: 50

TABLE 4-1 (continued)SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET


ENVIRONMENTAL THREAT MAXIMUM VALUEVALUE ASSIGNED

LIKELIHOOD OF RELEASE

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

WASTE CHARACTERISTICSQ

23. Ecosystem Toxicity/Persistence/Bioaccumulation * 5 x 1 0


25. Waste Characteristics 1,000 320

TARGETS

26. Sensitive Environments26a. Level I Concentrations ** 35026b. Level II Concentrations ** 3026c. Potential Contamination ** 0.8126d. Sensitive Environments (lines 26a + 26b + 26c) ** 380.81

27. Targets (value from line 26d) ** 380.81

ENVIRONMENTAL THREAT SCORE

28. Environmental Threat Score***[(lines 22 x 25 x 27)/82,500, subject to a maximum of 60] 60 60

SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE FOR A WATERSHED

29. Watershed Score***(lines 13 + 21 +28, subject to a maximum of 100) 100 100

SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE

30. Component Score (Sof)***(highest score from line 29 for all watersheds evaluated,subject to a maximum of 100) 100 100

Maximum value applies to waste characteristics category.Maximum value not applicable.Do not round to nearest integer.

WP51\ARCS\36203301\R-51-8-5-10 yiii ft R | Q Q H Q

REFERENCES

Please note that the number of pages listed for each reference indicates the number of pagesincluded in the reference package for this Hazard Ranking System document. This may or may notreflect the number of pages contained in a complete copy of the original reference.

ReferenceNumber Description of the Reference

1. United States Environmental Protection Agency, December 14, 1990. Hazard RankingSystem; Final Rule. 40 CFR Part 300, Federal Register, Volume 55, No. 241.

2. United States Environmental Protection Agency, June 1994. Superfund Chemical DataMatrix.

3. Maryland Waste Management Administration. June 1985. A Preliminary Assessment ofSauer Dump, Dundalk, Maryland. 40 pages.

4. Halliburton NUS Corporation, ARCS III, August 1995. Site Location Map, Sauer Dump,Dundalk, Baltimore County, Maryland. 1 page (presented in the documentation record).

5. Halliburton NUS Corporation, ARCS III, March 1994. Expanded Site Inspection, SauerDump, Project No. 3739-16. 626 pages.

6. NUS Corporation, FIT 3, July 3, 1986. Site Inspection of Sauer Dump. TDD No. F3-8505-33. 220 pages.

7. Halliburton NUS Corporation, ARCS III, November 5, 1992. Field Activities Plan, SauerDump, Dundalk, Baltimore County, Maryland. 17 pages.

8. Siewierski, E.G., Baltimore County Department of Health. March 11, 1985. FieldMemorandum. 1 page.

9. Siewierski, E.G., Baltimore County Department of Health, Bureau of EnvironmentalServices, September 18, 1985. Complaint Record. 2 pages.

10. Grills, Rick, Maryland Department of the Environment, to Frank Henderson. MarylandDepartment of the Environment, March 4, 1991. Memorandum. 1 page.

11. Matlock, Dennis D., United States Environmental Protection Agency, March 20, 1991.Polrep Number 1 and Final, Sauer Dump Site. 2 pages.

12. Halliburton NUS Corporation, ARCS III, August 1995. Source Location/Surface WaterContamination Map. 1 page.

13. United States Geological Survey. Middle River. Maryland Quadrangle, 7.5 Minute Series.Topographic Map. 1969, photorevised 1985; Gunpowder Neck, Maryland Quadrangle, 7.5Minute Series. Topographic Map. 1949, photorevised 1986; Hanesville, MarylandQuadrangle, 7.5 Minute Series. Topographic Map. 1948, photorevised 1985; SparrowsPoint, Maryland Quadrangle, 7.5 Minute Series. Topographic Map. 1969, photorevised1974; Swan Point, Maryland Quadrangle, 7.5 Minute Series. Topographic Map. 1953;Rock Hall, Maryland Quadrangle, 7.5 Minute Series. Topographic Map. 1953.photorevised 1973; Gibson Island, Maryland Quadrangle, 7.5 Minute Series. TopographicMap. 1954, photorevised 1979 and Love Point, Maryland Quadrangle, 7.5 Minute Series.Topographic Map. 1953. 1 page. (Supplemental information added by Halliburton NUS,ARCS III.) 1 page.

A R I O O O I OWP51 \ARCS\36203301 \R-51 -8-5-10 jx

14. Lippson, Alice Jane, Editor, the Natural Resources Institute of the University, of Maryland.1973. The Chesapeake Bay in Maryland, an Atlas of Natural Resources. 6 pages.

15. James, Robert, United States Geological Survey, with Donald Whalen, Halliburton NUS,August 1, 1995. Telecon. 1 page.

16. Halliburton NUS Corporation, ARCS III, December 7, 8, and 9, 1992. Expanded SiteInspection of Sauer Dump, Logbook Nos. P022 and P023. Project No. 3738-1605. 40pages.

17. Lewis, Connie, Maryland Department of Natural Resources, to Donald Whalen, HalliburtonNUS, August 3, 1995. Correspondence. 3 pages.

18. United States Geological Survey. Baltimore, Maryland Quadrangle, 30 x 60 Minute Series.Topographic Map. 1984. Combined with Washington, D.C. - Maryland Quadrangle, 30x 60 Minute Series. Topographic Map. 1983. 1 page. (Supplemental information addedby Halliburton NUS, ARCS III.) 1 page.

19. Maryland Department of the Environment, July 1, 1991. Code of Regulations, 26.08.02.Water Quality. 3 pages.

20. McKegg, Janet, Maryland Department of Natural Resources, to Gregory DeCowsky,Halliburton NUS, December 21, 1992. Correspondence. 2 pages.

21. United States Department of the Interior, Fish and Wildlife Service. Middle River, MarylandQuadrangle, 7.5 Minute Series. National Wetlands Inventory Map. March 1982.Combined with Gunpowder Neck, Maryland Quadrangle, 7.5 Minute Series. NationalWetlands Inventory Map. April 1982; Hanesville, Maryland Quadrangle, 7.5 Minute Series.National Wetlands Inventory Map. March 1982; Sparrows Point. Maryland Quadrangle, 7.5Minute Series. National Wetlands Inventory Map. March 1982; Swan Point, MarylandQuadrangle, 7.5 Minute Series. National Wetlands Inventory Map. March 1982; RockHall, Maryland Quadrangle, 7.5 Minute Series. National Wetlands Inventory Map. March1982; Gibson Point, Maryland Quadrangle, 7.5 Minute Series. National Wetlands InventoryMap. March 1982; and Love Point, Maryland Quadrangle, 7.5 Minute Series. NationalWetlands Inventory Map. March 1981. 1 page. (Supplemental Information added byHalliburton NUS, ARCS III.) 1 page.

22. United States Environmental Protection Agency, July 1994. Using Qualified Data toDocument an Observed Release. Directive 9285.7-14FS, PB94-963311, EPA\540\F-94\028. 14 pages.

23. Halliburton NUS Corporation, September 1995. Planimeter Calculation Sheet for PotentialHuman Food Chain Contamination. 1 page.

24. Lewis, Connie, Maryland Department of Natural Resources, with Donald Whalen.Halliburton NUS, August 3, 1995. Telecon. 1 page.

25. Halliburton NUS Corporation, ARCS III, August 1995. Wetlands Location Map, SauerDump, Dundalk, Maryland. 1 page. (Presented in the documentation record.)

A R I O O OWP51\ARCS\36203301\R-51 -8-5-10 v

SITE SUMMARY

The Sauer Dump Site is located at 4225 Lynnhurst Road in Dundalk, Baltimore County, Maryland [ref. nos.3 (p. 4) and 4 (p. 2, documentation record)]. The approximately 2-acre site is bordered by a cove of theBack River to the south, a pond to the northwest, a marsh to the west, and a tidal channel to the east [ref.no. 25 (p. 3, doc. rec.)].

In the middle to late 1950s, the site properly was owned by William Lusk, Jr. [ref. no. 3 (pp. 1 and 22).The site was part of a larger area of marshland that was being filled and stabilized by Mr. Lusk [ref. no.3 (pp. 1 and 22)]. The site property was bought by the late Frederick Sauer from Irene Sessa inapproximately 1963 [ref. no. 6 (p. 2-1)]. It is not known when Irene Sessa bought the property or how sheused it [ref. no. 6 (p. 2-1)]. Mr. Sauer used the property as an unpermitted open dump and salvageoperation [ref. no. 3 (p. pp. 2 and 13)]. As of December 1992, the site was owned by Fred Sauer (the sonof the late Frederick Sauer) and the Beachwood Development Corporation [ref. no. 7 (p. 1)]. It is notknown when Fred Sauer became the owner.

On November 8, 1954, the Baltimore County Health Department (BCHD) performed an inspection of Mr.Lusk's property because of complaints by adjacent property owners of floating debris on the Back River[ref. no. 3 (p. 22)]. The site consisted of marshland fronting the Back River that was being filled withmaterial consisting mainly of plaster board and "other waste materials of an inert nature," according toBCHD [ref. no. 3 (p. 22)]. Several areas had been raised to several feet above normal water levels dueto dumping operations [ref. no. 3 (p. 22)]. The floating debris about which the residents complainedconsisted of paper that had separated from the plasterboard when it had been immersed in water [ref. no.3 (p. 22)]. Mr. Lusk was near completion of filling operations and was planning to cover the area with earthand building materials [ref. no. 3 (p. 22)]. No action was taken against Mr. Lusk [ref. no. 3 (p. 22)].

On April 4, 1984, BCHD conducted an inspection of the site due to a request for an evaluation by aproposed developer [ref. no. 3 (p. 1)]. A large quantity of debris, including auto parts, empty drums, wood,and plastic products, was observed on the surface, partially buried by earth [ref. no. 3 (p. 20)]. Nocontrolled hazardous substances were observed [ref. no. 3 (p. 20)]. As a result of this inspection, on April12,1984, BCHD ordered Mr. Sauer to clean up the site within 60 days, citing violations of the County Code[ref. no. 3 (p.1)].

On May 4, 1984, a follow-up inspection by BCHD found that no additional waste had been accepted [ref.no. 3 (p. 21)]. On June 8, 1984, BCHD inspected the site and found that little progress had been madein cleaning up the site [ref. no. 3 (p. 21)].

On October 2, 1984, an inspection by BCHD found that 60 to 70 percent of the cleanup had beencompleted [ref. no. 3 (p. 21)]. On January 24, 1985, the Maryland Waste Management Administration(MWMA), accompanied by BCHD, conducted a preliminary assessment of the site [ref. no. 3 (pp. 2 and4)]. Approximately 70 percent of the original debris had been removed from the site [ref. no. 3 (p. 2)]. Inaddition, a small quantity (5 to 10 cubic yards) of refuse had been brought on site since the October 2inspection [ref. no. 3 (p. 21)]. The following wastes were observed on site: "paper, lumber, scrap metal,demolition debris, old empty trailers, junked cars, a couple of cranes and dozers and about 10 to 12 emptyand rusted drums" [ref. no. 3 (p. 2)]. No evidence of hazardous materials or water contamination problemswas observed [ref. no. 3 (p. 2)]. The report states that the owner had no records of the waste types andquantities disposed at the site [ref. no. 3 (p. 2)]. In a maintenance shed in the northwestern corner of theproperty were a drum containing solvent and a drum containing antifreeze, both used for vehiclemaintenance [ref. no. 3 (p. 2)]. Two burn areas were observed on site: an approximately 30- by 30-footarea of charred debris and ashes on the southern border of the site and an empty, rusted roll-off truck box.which was used for burning paint off scrap metal [ref. no. 3 (p. 2)]. The report mentions that the site hadbeen used to store approximately 250 empty drums, which were removed in the summer of 1984 [ref. no.3(p. 3)].

WP51\ARCS\36203301\R-51-8-5-10 o n 1 2

SITE LOCATION

,* /sVEssei Skyoirn ,'•' /

TcdU •'. \ »,Fl»t 3

Porter Pio

SCALE 1.24X00

MOO 6000 'OOP FEE1

QUAOSANGLE LOCA' ON I

SOURCE: (7.5 MINUTE SERIES) U.S.G.S. MIDDLE RIVER, MD, QUAD.

SITE LOCATION MAP

SAUER DUMP, DUNDALK, BALTIMORE Co., MD.

REFERENCE NO. 4

M(SCALE 1:24000)-*

p i n n nHALLIBURTON NUSEnvironmental Corporation

AUGUST 1995

3

BACK RIVER

GENERALIZED SHORELINE(VARIES W/TIDE)

ct:

REFERENCE NO. 25

WETLANDS LOCATION MAPSAUER DUMP

DUNDALK, MARYLANDAUGUST 1995

100

SCALE IN FEET

200

Halliburton NUSC O R P O R A T I O N

The BCHD report recommended further investigation due to unanswered questions regarding the contents,handling, and disposal of the drums and the fact that the waste types and quantities diajrcsed at the sitewere not known [ref. no. 3 (p. 3)]. An administrative conference with the owner was Kj fe l BCHDto inform him that additional legal action may be taken to ensure the immediate clean•M^Blfcfref. no.3 (p. 21)]. On March 11, 1985, a BCHD inspection of the site found that "significan^ j SKad beenmade in site cleanup since the last inspection. The entire site, except for the perimeter, hacIbeiK cleanedand graded. Debris observed along the perimeter included metal scraps, wood, furnitute, (Sees, and paperscraps (ref. no. 8).

On June 27, 1985, Halliburton NUS Corporation (HNUS) (formerly NUS Corporation), accompanied byrepresentatives of EPA, Maryland Department of Health and Mental Hygiene (MD DHMH), and BCHD,conducted a site inspection of the site [ref. no. 6 (p. 5-1). The following wastes were observed on site:large piles of construction debris (concrete, wire, plaster, rebar, and wood); large, empty storage tanks;several empty trucks and trailers; metal scrap; on open-ended dumpster that served as a burn area; anda former burn area covered with wood chips [ref. no. 6 (pp. 2-1 and B-3)]. On-site surface and subsurfacesoil samples and on-sile surface water and sediment samples were collected [ref. no. 6 (pp. 5-3, 6-2, andB-4)]. No background soil sample was collected, however [ref. no. 6 (p. 5-5)]. PCBs were detected in on-site surface and subsurface soil samples and on-site sediment samples at concentrations up to 267,899ppb and in an on-site surface water sample at 29.91 ppb [ref. no. 6 (p. 6-3)]. Various polycyclic aromatichydrocarbons (PAHs) and phthalates were delected in on-site surface and subsurface soils and on-sitesurface water and sediment samples [ref. no. 6 (pp. 6-2 and 6-3)].

On September 17, 1985, BCHD inspected the site and found that further progress had been made in sitecleanup [ref. no. 9 (p. 1)]. It was noted that metal and wood scraps and pieces of equipment were stillbeing brought into the site for storage and eventual salvage or re-use [ref. no. 9 (p. 1)].

On March 1, 1991, the Maryland Department of the Environment (MDE) and EPA Emergency Removalevaluated the site for an emergency removal action in response to elevated levels of PCBs in on-site soils[ref. nos. 10 and 11 (p. 1)]. Samples collected by MDE on October 24, 1990 contained PCBs at 110 ppmand 62 ppm in soils adjacent to the on-site tidal channel [ref. nos. 10 and 11 (p. 1)]. The following werenoted during the removal assessment:

• Three empty storage tanks with a capacity of up to approximately 2,000 gallons.

• Approximately fifty 55-gallon steel drums, empty and rusted.

• Several pieces of heavy equipment in various stages of decay (cranes, roll-offs, and boxtrailers).

• An area currently utilized for welding operations.

• Evidence of ongoing fill and grading operations utilizing construction and metal debris.

• No release or threat of releases was observed. No releases to the stream or leakingdrums/containers were observed, [ref. no 11 (pp. 1 and 2)}.

As a result of the inspection, no further removal action was deemed necessary [ref. no. 11 (p. 2)].

On December 7 through 10, HNUS and Gannett Fleming, Incorporated (GF) personnel conducted anexpanded site inspection of the Sauer Dump Site [ref. no. 5 (p. 2-1)]. A large amount of debris wasobserved on the ground surface, including scrap metal, concrete pipe, broker concrete and asphalt, railroadties, treated lumber, rigging hardware, wire, cable, plastic, rock, and gravel. In addition, about 12 rusty 55-gallon drums were observed at various locations [ref. no. 5 (p. 2-8)]. Samples were collected from on-sitesurface soils, surface water, and sediment; surface water and sediment samples were also taken from theBack River [ref. no. 5 (pp. 2-3, 2-4, 2-5, and 2-6)]. On-sile surface soils contained elevated levels ofAroclor 1254 (up to 150 ppm), phenol (up to 21 ppm), naphthalene (up to 20 ppm), several other PAHs

A R ! 0 0 H I 5WP51\ARCS\36203301\R-51-8-5-10 4

and metals, including arsenic, chromium, lead, manganese, and nickel [ref. no. 5 (pp. 2-6, 3-3, 3-4, 3-31,3-32, 3-33, 3-34, 3-36, and 3-37)]. On-site sediment samples contained elevated levels of Aroclor 1254,several metals, including chromium, lead, and nickel, and several PAHs [ref. no. 5 (c^^^h^^ -3, 3-31,3-35, and 3-36)]. On-site surface water samples contained elevated levels of nnetaV^^H^H^p. 2-6,

In summary, the site consists of one source: contaminated soil. Hazardous substances'were detected insurface soil samples at elevated levels relative to background (see Section 2.4.1 of the doc. rec.).

The site was operated as an unpermitted landfill from the early 1950s until 1984 [ref. no. 2 (p. 1)]. Thereare no records of waste types and quantities accepted by the landfill [ref. no. 3 (p. 2)]. Wastes observedat the facility include scrap metal, wood, tires, paper, junked vehicles, construction debris, empty drums,and empty storage tanks [ref. nos. 3 (p. 2), 5 (p. 2-8), 8, and 11 (p. 1)].

ft R ! 0 n n I 6WP51 \ARCS\36203301 \R-51 -8-5-10 5

SD - Characterization and ContalMDent

SOURCE DESCRIPTION

2.2 SOURCE CHARACTERIZATION

Nkjmber of the source: 1

Name and description of the source: Contaminated soil

On-site surface soil samples collected by HNUS in June 1985 contained PCBs and various PAHs [ref. no.6 (pp. 5-1, 6-4, 6-5, and B-3)]. On-site surface soils collected by HNUS/GF in December 1992 containedelevated levels of PCBs, PAHs, pesticides, and metals [ref. no. 5 (pp. 2-1, 2-5, 2-6, 3-3, 3-4, 3-31, 3-32,3-34, 3-36, and 3-37)].

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

The 1985 soil samples were located in the western half of the site in a former drum storage area and ina burn area [ref. no. 6 (pp. 5-3 and B-3)]. Soil samples collected in December 1992 were distributedthroughout the central portion of the site [ref. no. 5 (p. 2-6)].

Containment

Release to groundwater: Not evaluated

Release via overland migration and/or flood:

The site is bordered by a tidal channel to the east, a marsh to the west, and the Back River to the south[ref. nos. 3 (pp. 9 and 18), 5 (pp. 1-3 and 1-4), and 6 (pp. 3-1 and B-3)]. No maintained engineered coveror functioning and maintained run-on control system and runoff management system is present [ref. no.3 (p. 15)]. Therefore, a surface water containment factor value of 10 was assigned [ref. no. 1 (Table 4-2)].

Gas release to air: Not evaluated

Particulate release to air: Not evaluated

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RGURE 2-1

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SD - Hazardous SubstancesSource No.: 1

2.4 WASTE CHARACTERISTICS

2.4.1 Hazardous Substances

Hazardous Substance Evidence Reference

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene

bis(2-ethylhexyl) phthalate

butylbenzyl phthalate

chrysene

chlordane alpha

chlordane gamma

fluoranthene

naphthalene

phenanthrene

phenol

pyrene

chromium

lead

mercury

nickel

selenium

silver

S-6, S-8, S-9, S-10,and S-11

S-1, S-6, S-7, S-8,and S-9

S-1, S-7, S-8, S-9,and S-10

S-1, S-6, and S-9

S-8 and S-9

S-1, S-6, S-7, S-8,and S-9

S-11

S-2, and S-7

S-7, S-8, and S-9

S-10

S-6, S-7, S-8, andS-9

S-10

S-7, S-8, and S-9

S-8 and S-9

S-8, S-9, and S-10

S-1, S-2, S-5, S-6,S-8, S-9, S-10, andS-11

S-1, S-6, S-7, S-8,S-9, S-10, and S-11

S-9

S-9

5 (pp. 2-6, 3-36, 3-37, B- 3, B-201,B-204, B-206, B-207, and B-208)

5 (pp. 2-6, 3-31, 3-34, B-170, B-176,B-178, and B-180)

5 (pp. 2-6, 3-31, 3-34, B-170, B-176,B-178, B-180, B-182, and B-183)

5 (pp. 2-6, 3-31, 3-34, B-170, B-176,and B-182)

5 (pp. 2-6, 3-34, B-180, and B-182)

5 (pp. 2-6, 3-31, 3-34, B-170, B-176,B-178, B-180, and B-182)

5 (pp. 2-6, 3-37, and B-208)

5 (pp. 2-6, 3-36, 3-37, B-199, and B-202)

5 (pp. 2-6, 3-34, B-178, B-180, andB-182)

5 (pp. 2-6, 3-32, and B-183)

5 (pp. 2-6, 3-34, B-176, B-178, B-180,and B-182)

5 (pp. 2-6, 3-32, and B-183)

5 (pp. 2-6, 3-34, B-178, B-180, andB-182)

5 (pp. 3-4, B-24, and B-25)

5 (pp. 2-6, 3-4, B-24, B-25, and B-26)

5 (pp. 2-6, 3-3, 3-4, B-19, B-20, B-21,B-22, B-24, B-26, and B-27)

5 (pp. 2-6, 3-3, 3-4, B-19, B-22, B-23,B-24, B-25, B-26, and B-27)

5 (pp. 2-6, 3-4, and B-25)

5 (pp. 2-6, 3-4, and B-25)

WP51 \ARCS\36203301\R-51 -8-5-10

-H i

n r.

Hazardous Substance

vanadium

zinc

Evidence Reference

S-1 and S-8 5 (pp. 2-6, 3-3, 3-4, B-19, an<

S-8, S-9, and S-10 5 (pp. 2-6, 3-4, B-24, B-25, and;B-26]

* This and the following listed items are on-site surface soil samples taken by HNUS/GF inDecember 1992 [ref. no. 5 (pp. 2-1, 2-5, and 2-6)].

The substances listed above were detected in surface soil samples at elevated levels relative tobackground [ref. no. 5 (pp. 2-5, 3-3, 3-4, 3-31, 3-32, 3-34, 3-36, and 3-37)].

The site was operated as an unpermitted landfill from the early 1950s until 1984 [ref. no. 3 (p. 1)]. Thereare no records of the waste types and quantities accepted by the landfill [ref. no. 3 (p. 2)]. The followingwastes have been observed at the site: scrap metal, wood, tires, paper, junked vehicles, constructiondebris, empty drums, and empty storage tanks [ref. nos. 3 (p. 2), 5 (p. 2-8), 8, and 11 (p. 1)].

The site has been used for scrap metal salvaging [ref. no. 3 (p. 2)]. In addition, approximately 250 emptydrums were removed from the site in 1984 [ref. no. 3 (p. 4)]. Because the contents and handling of thesedrums while they were on site are not known, the drums represent a possible source of contamination [ref.no. 3 (p. 4)].

WP51 \ARCS\36203301 \R-51 -8-5-10 rt 2

The following tables list the background sample and corresponding source samples used topresence of hazardous substances associated with this source:

Sample ID

Background Sample

S-12

Source Samples

S-1

S-2

S-5

S-6

S-7

S-8

S-9

S-10

S-11

ret. no. 5 (p. 2-5)

Hazardous Substance

Background Sample S-12

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene



chrysene

chlordane, alpha

chlordane, gamma

fluoranthene

naphthalene

phenanthrene

phenol

pyrene

chromium

Sample Medium

soil

soil

soil

soil

soil

soil

soil

soil

soil

soil

Concentration

ND

ND

ND

82B ug/kg

288 (67J) ug/kg

ND

0.45B ug/kg

ND

630 (63J) ug/kg

ND

ND

262 (82J) ug/kg

423 (51 J) ug/kg

14.3 mg/kg

Laboratory Identification Number'

CHH43 (organic); MCGX 41 (inorganic)

CHH43 (organic); MCGX41 (inorganic)









Sample Quantitation Limit*

47 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

2.4 ug/kg

2.4 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

471 ug/kg

2.8 mg/kg

WP51 \ARCS\3620 3301 \R-51-8-5-10 ., R i G C G 2 I

Hazardous Substance

lead

mercury

nickel

selenium

silver

vanadium

zinc

Concentration

53.2 mg/kg

[0.09] mg/kg

1 1 .2 mg/kg

3.2 (1 .4J) mg/kg

[1.9] B mg/kg

24.7 mg/kg

98.2 (75.5L) mg/kg

Sample Quantitation Limit*

16.9 mg/kg jg

0.28 mg/kg ^^

1 1 .3 mg/kg p.; ,

1.4 mg/kg ^: _•

2.8 mg/kg

14.1 mg/kg

5.6 mg/kg

ref. no. 5 (pp. 3-4, 3-32, 3-34, 3-37, B-28, B-187, B-188, and B-210)

* Sample quantisation limits are calculated by using the following formula [ref. no. 5 (p. 3-32)]:

contact required detection limit x sample dilution factor

L =

(100 - percent moisture)/100

Analyte present. As values approach the instrument detection limit, the quantitation may not beaccurate [ref. no. 5 (p. 3-1)].

Analyte present. Reported value may be biased low. Actual value is expected to be higher.Biased-low concentrations in background samples are multiplied by an analyte-specific factor. Theresulting value is listed in front of the unadjusted value [ref. nos. 5 (p. 3-1) and 23],

B = Not detected substantially above the level reported in laboratory or field blanks [ref. no. 5 (p. 3-1)].

Hazardous Substance Concentration Sample Quantitation Limit*

Source Sample S-1

benz(a)anthracene

benzo(a)pyrene


chrysene

mercury

nickel

vanadium

Source Sample S-2

chlordane gamma

mercury

465 ug/kg (2,000 J ug/kg)

530 ug/kg

450 ug/kg

540 ug/kg

0.27 mg/kg

60.8 mg/kg

77.9 mg/kg

4.2L ug/kg

8.1 mg/kg

407 ug/kg

407 ug/kg

407 ug/kg

407 ug/kg

0.23 mg/kg

9.1 mg/kg

11.3 mg/kg

2.0 ug/kg

1.1 mg/kg

WP51 \ARCS\36203301 \R-51-8-5-10 10 flRI00022

Hazardous Substance Concentration Sample Quantital

Source Sample S-5

mercury

Source Sample S-6

Aroclor 1254

benz(a)anthracene

bis(2-ethylhexyl) phlhalate

chrysene

phenanthrene

mercury

nickel

Source Sample S-7

benz(a)anthracene

benzo(a)pyrene

chrysene

chlordane, gamma

fluoranthene

phenanthrene

pyrene

nickel

Source Sample S-8

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene


chrysene

fluoranthene

phenanthrene

pyrene

chromium

lead

mercury

nickel

vanadium

zinc

0.31 mg/kg

320 ug/kg

810 ug/kg

710 ug/kg

570 ug/kg

420 ug/kg

0.32 mg/kg

19 mg/kg

2,100 ug/kg

1 ,800 ug/kg

1 ,900 ug/kg

30 ug/kg

7,1 00 ug/kg

5,600 ug/kg

4,500 ug/kg

22.6 ug/kg

29,000 ug/kg

3,600 ug/kg

2,800 ug/kg

2,900 ug/kg

3,100 ug/kg

7,500 ug/kg

4,600 ug/kg

5,000 ug/kg

134 mg/kg

1,170 mg/kg

3.1 mg/kg

88.2 mg/kg

1 1 9 mg/kg

1,9101 mg/kg

,^0.23 rrfg/kg•'%. >,•c_- \

36 ug/kg

407 ug/kg

407 ug/kg

407 ug/kg

407 ug/kg

0.26 mg/kg

10.4 mg/kg

1 ,303 ug/kg

1 ,303 ug/kg

1 ,303 ug/kg

2.2 ug/kg

1 ,303 ug/kg

1 ,303 ug/kg

1 ,303 ug/kg

9.9 ug/kg

5,000 ug/kg

1,500 ug/kg

1 ,500 ug/kg

1 ,500 ug/kg

1 ,500 ug/kg

1 ,500 ug/kg

1 ,500 ug/kg

1 ,500 ug/kg

2.6 mg/kg

155 mg/kg

0.52 mg/kg

10.3 mg/kg

12.9 mg/kg

5.2 mg/kg

WP51 \ARCS\36203301 \R-51 -8-5-10 11 A R I 0 0 0 2 3

Hazardous Substance Concentration Sample Quantitation Limit*

Source Sample S-9 (--£'Aroclor1254 150,000 ug/kg 38,372 ug/kg -V'^v

benz(a)anthracene 890 ug/kg 384 ug/kg

benzo(a)pyrene 610 ug/kg 384 ug/kg

bis(2-ethylhexyl) phthalate 1,300 ug/kg 384 ug/kg

butylbenzyl phthalate 2,200 ug/kg 384 ug/kg

chrysene 660 ug/kg 384 ug/kg

fluoranthene 2,000 ug/kg 384 ug/kg

phenanthrene 720 ug/kg 384 ug/kg

pyrene 1,500 ug/kg 384 ug/kg

chromium 645 mg/kg 27 mg/kg

lead 3,160 mg/kg 159 mg/kg

mercury 5.6 mg/kg 0.53 mg/kg

nickel 304 mg/kg 10.6 mg/kg

selenium 18.2L mg/kg 6.6 mg/kg

silver 11.6 mg/kg 2.7 mg/kg

zinc 4,7901 mg/kg 5.3 mg/kg

Source Sample S-10

Aroclor 1254 110 ug/kg (1,1 OOJ ug/kg) 41 ug/kg

benzo(a)pyrene 2,800 ug/kg 1,500 ug/kg

naphthalene 20,000 ug/kg 3,626 ug/kg

phenol 21,000 ug/kg 3,626 ug/kg

lead 600 mg/kg 156 mg/kg


nickel 44.9 mg/kg 10.4 mg/kg

zinc 420L mg/kg 5.2 mg/kg

Source Sample S-11

Aroclor 1254 48 ug/kg (480J ug/kg) 41 ug/kg

chlordane, alpha 2.6 ug/kg (26J ug/kg) 1.9 ug/kg


nickel 46 mg/kg 10.6 mg/kg

ref. no. 5 (pp. 2-6, 3-3, 3-4, 3-31, 3-32, 3-34, 3-36, 3-37, B-19, B-20, B-21, B-22, B-23, B-24, B-25, B-26,B-27, B-170, B-176, B-178, B-180, B-182, B-183, B-198, B-199, B-201, B-202, B-204, B-206, B-207, andB-208)

WP51\ARCS\36203301\R-51-8-5-10 12 fi R I 0 0 0 2 ^

* Sample quantitation limits are calculated by using the following formula [ref. no. 5 (p. 3-

contact required detection limit x sample dilution factor

(100 - percent moisture)/"! 00

J= Analyte present. Reported value may not be accurate or precise [ref. no. 5 (p. 3-1)]. The bias ofJ-qualified data is unknown. Therefore, the J-qualified release values have been divided by ananalyte-specific factor, making these data eligible for MRS evaluation (ref. no. 23). These adjustedvalues area listed in front of the unadjusted J-qualified results.

L = Analyte present. Reported value may be biased low. Actual value is expected to be higher [ref.no. 5 (-. 3-1)]. Biased-low concentrations in background samples are multiplied by an analyte-specific factor (ref. no. 23).

WP51\ARCS\36203301\R-51-8-5-10 13 A R 1 0 0 0 2 5

SD - Hazardous Constituent QuantitySource No.: 1

2.4.2 Hazardous Waste Quantity

2.4.2.1.1 Hazardous Constituent Quantity

ConstituentHazardous Substance Quantity (pounds) Reference

A hazardous constituent quantity for this source is not documented.

sum: (pounds)

Hazardous Constituent Quantity Value (C): 0

WPS 1 \ARCS\36203301 \R-51-8-5-10 14A R I O O G 2 6

2.4.2.1.2 Hazardous Wastestream Quantity

Hazardous WastestreamQuantity(pounds)

SD - Hazardous Wastestream QuaSource

Reference

A hazardous Wastestream quantity for this source is not documented.

sum: (pounds)

Hazardous Wastestream Quantity Value (W): 0

WP51 \ARCS\36203301 \R-51 -8-5-10 15A R I 0 0 0 2 7

2.4.2.1.3 Volume

The volume of this source is not documented.

SD - Hazardous Waste QuSource

Dimension of source (yd3 or gallons):

References:

Volume Assigned Value: 0

2.4.2.1.4 Area

The area of contaminated soil is 21,700 square feet [ref. nos. 5 (pp. 3-3, 3-4, 3-31, 3-32, 3-33, 3-34, 3-36,and 3-37) and 12].

21,700 + 34,000* = 0.62

* Division for contaminated soil [ref. no. 1 (table 2-5)]

Area of source (ft2): 21,700

References:

Area Assigned Value: 0.62

2.4.2.1.5 Source Hazardous Waste Quantity Value

Source Hazardous Waste Quantity Value: 0.62

WP51\ARCS\36203301\R-51 -8-5-10 16A R I O O Q 2 8

SITE SUMMARY OF SOURCE DESCRIPTIONS

Containment

Source Hazardous AirSource No. Waste Quantity Value Groundwater Surface Water Air Gas Particulate

(contaminated soil) 0.62 not evaluated 10 not evaluated not evaluated

Total Source Hazardous Waste Quantity Value: 1 (rounded) [ref. no. 1 (Section 2.4.2.2)]Site Hazardous Waste Quantity Factor Value: 100*

[ref. no. 1 (table 2-6)]

Because hazardous constituent quantity is not adequately determined and because targets in the surface waterpathway are subject to actual contamination, a site hazardous waste quantity factor value of 100 is assigned to thesurface water migration pathway [ref. no. 1 (Section 2.42.2) and Section 4.1.4.3 of the doc. rec.].

WP51\ARCS\36203301\R-51-8-5-10 17 A R I O O G 2 9

SWOF - Surface Water Overland Flow/Flood Migration P,

4.0 SURFACE WATER MIGRATION PATHWAY

4.1 OVERLAND/FLOOD MIGRATION COMPONENT

4.1.1.1 DEFINITION OF HAZARDOUS SUBSTANCE MIGRATION PATH FOR OVERLAND/FLOODCOMPONENT

The site is bordered by unnamed tributaries to the Back River to the east and west and by the Back Riverto the south [ref. no. 4 (pp. 1-3 and 1-4)].

Since no specific drainage pathways are apparent, the probable points of entry (PPE) will be defined bythe shortest distance from the source to each of these surface water bodies (ref. no. 12). From therespective PPEs, the eastern unnamed tributary flows 140 feet to the Back River and the western unnamedtributary flows 580 feet (ref. no. 12). The eastern unnamed tributary and a portion of the western unnamedtributary are tidally influenced [ref. no. 4 (pp. 4-5, 4-9, and 4-10)]. The Back River is tidally influencedupstream to the confluence with Northeast Creek, as determined by the presence of tidal flats on thetopographic map (ref. no. 13). The Back River flows to the southeast 3.80 miles and empties into theChesapeake Bay (ref. no. 13). The remaining portion of the 15-mile surface water migration pathway(11.20 miles) is in the Chesapeake Bay (ref. no. 13). The portion of the Chesapeake Bay within thesurface water migration pathway is tidally influenced [ref. nos. 13 and 14 (p. 4)].

The most upstream PPE to the surface water migration pathway is to the western unnamed tributary (ref.no. 12). The most downstream PPE is to the Back River adjacent to the site (ref. no. 12). The mostdownstream PPE is approximately 580 feet (0.11 mile) from the most upstream PPE (ref. no. 12).

No gaging stations are located within the surface water migration pathway (ref. no. 15). Therefore, the flowfor the surface water bodies must be estimated.

The flow rates and drainage areas of three tributaries of the Back River are as follows (ref. no. 15):

Stream

Stemmers Run

Brian Run

West Branch of Herring Run

Drainage Area(square miles)

4.46

1.97

2.13

Flow Rate (cfs)

6.51

2.55

2.59

The average flow rate per square mile of drainage area for the Back River drainage basin is estimated asfollows:

6.51 cfs + 2.55 cfs + 2.59 cfs

4.46 sq. mi. + 1.97 sq. mi. + 2.13 sq. mi

11.65 cfs

8.56 sq. mi.= 1.36 cfs per sq. mi.

The drainage area of the Back River at its mouth is 62.4 square miles (ref. no. 15). The approximate flowrate of the Back River at its mouth is

62.4 sq. mi. x 1.36 cfs/sq. mi. = 84.86 cfs

WP51\ARCS\36203301\R-51-8-5-10 18

& R I O Q 0 3 0

The flow rates of the unnamed tributaries on the eastern and western borders of the site are estimbe less than 10 cfs. A flow rate of 10 cfs corresponds to a drainage area of 7.35 sq. mi. (10 cfscfs/sq. mi.). The area of the site is only 0. 003 sq. mi. (2 acres - 640 ac./sq. mi.).

The Chesapeake Bay is a coastal tidal water and, therefore, flow is not applicable [ref. no. 1 (Table

Surface Water Body

Western Unnamed Tributary

Eastern Unnamed Tributary

Back River

Chesapeake Bay

Length (miles)

Start

0

0

0.11

3.91

End

0.11

0.03

3.91

15.11

Flow(cfs)

<10

<10

10 to100

NA

Dilution Weight[ref. no. 1 (table 4-1 3)]

1

1

0.1

0.0001

Reference

see above

see above

see above

see above

WP51 \ARC S\36203301 \R-51 -8-5-10 19 & R I O O Q 3 !

4.1.2.1 LIKELIHOOD OF RELEASE

4.1.2.1.1 OBSERVED RELEASE

Direct Observation

Basis for Direct Observation

N/A

Hazardous Substances in the Release

N/A

Chemical Analysis

Background Concentration

Sample ID Sampling Location Depth Date Reference

Sd-26 Northeastern tip ofWetland Unit 2

SW-26 Northeastern tip ofWetland Unit 2

unknown Decembers, 1992

unknown December 8, 1992

5 (pp. 2-1, 2-3, and 2-6)and 16 (p. 37)

5 (pp. 2-1, 2-3, and 2-6)and 16 (p. 37)

WP51 \ARCS\36203301 \R-51 -8-5-10 20A R I 0 0 0 3 2

Sample ID Hazardous Substance Concentration

SampleQuantitationLimit Reference

Sd-26 Aroclor1254(CHH05)

benzo(a)pyrene

benz(a)anthracene

alpha chlordane

chrysene

fluoranthene

phenanthrene

pyrene

(MCGX05) chromium

lead

mercury

nickel

selenium

vanadium

zinc

SW-26 chromium(MCGX06)

lead

mercury

nickel

selenium

vanadium

zinc

ND

ND

ND

0.69 ug/kg

ND

1,200 (120J)* ug/kg

ND

1,162 (140J)* ug/kg

16.4 ppm mg/kg

68.3 mg/kg

0.32 mg/kg

[12.2]B mg/kg

10.6 (4.6J)* mg/kg

[23.0] mg/kg

147 mg/kg

ND

6.1 B ug/kg

ND

ND

ND

ND

23.7B ug/kg

1 03 ug/kg

1,031 ug/kg

1,031 ug/kg

5.3 ug/kg

1,031 ug/kg

1,031 ug/kg

1,031 ug/kg

1,031 ug/kg

3 mg/kg

10 mg/kg

0.3 mg/kg

13 mg/kg

2 mg/kg

1 7 mg/kg

7 mg/kg

10ug/L

3 ug/L

0.2 ug/L

40 ug/L

5 ug/L

50 ug/L

20 ug/L

5 (pp. 3-35 and B-1$8,''^ . v

5 (pp. 3-28 and B-134)

5 (pp. 3-28 and B-134)

5 (pp. 3-35 and B-192)

5 (pp. 3-28 and B-134)

5 (pp. 3-28 and B-134)

5 (pp. 3-28 and B-134)

5 (pp. 3-28 and B-134)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-2 and B-6)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)

5 (pp. 3-5 and B-30)t

Note: B = Not detected substantially above the level reported in laboratory or field blanks.[ ]= Indicates analyte present. As values approach the instrument detection limit, the

quantitation may not be accurate.

* A J qualifier indicates that the analyte was present, but the reported value may not be accurate orprecise [ref. no. 5 (p. 3-1)]. The direction of bias of these J-qualified results is not known.Therefore, the J- qualified background values have been multiplied by an analyte-specific factor,making these data eligible for MRS evaluation (ref. no. 23). These adjusted values are listed infront of the unadjusted J-qualified results.

WPS 1 \ARC SN36203301 \R-51 -8-5-10 21flRIOOG33

Contaminated Samples


Sd-4

Sd-10

Sd-18

Sd-21

Sd-22

Small feedertributary on easternborder of site

Wetland Unit 4

Wetland Unit 3

Drainage ditchbetween WetlandUnits 2 and 3

Drainage ditchleading fromWetland Unit 2 toWetland Unit 3

unknown

unknown

unknown

unknown

unknown

Sd-25

Sd-27

Sd-1

Sd-15

Sd-24

Sd-2

SW-10

SW-15

SW-18

SW-22

SW-25

SW-1

Wetland Unit 2

Wetland Unit 5

Wetland Unit 5

Wetland Unit 3

Wetland Unit 2

Wetland Unit 5

Wetland Unit 4

Wetland Unit 3

Wetland Unit 3

Drainage ditchleading fromWetland Unit 2 toWetland Unit 3

Wetland Unit 2

Wetland Unit 5

unknown

unknown

unknown

unknown

unknown

unknown

2 to 3 inches

unknown

unknown

6 to 8 inches

unknown

unknown

December 9, 1992

December 9, 1992

December 9, 1992

December 9, 1992

December 9, 1992

December 9, 1992

December 9, 1992

December 8, 1992

December 8, 1992

December 8, 1992

December 9, 1992

December 9, 1992

December 8, 1992

December 9, 1992

December 9, 1992

December 9, 1992

December 8, 1992

5 (pp. 2-1. 2-*',2-6) and 16 (p. 38)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 37)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 39)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 39)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 39)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 39)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 38)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 36)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 36)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 37)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 38)

5 (pp. 2-1, 2-4, and2-6) and 17 (p. 20)

5 (pp. 2-1, 2-3, and2-6) and 16 (p. 36)

5 (pp. 2-1, 2-4, and2-6) and 17 (p. 20)

5 (pp. 2-1, 2-4, and2-6) and 17 (p. 21)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 38)

5 (pp. 2-1, 2-4, and2-6) and 16 (p. 36)

WP51\ARCS\36203301 \R-51-8-5-10 22A R I G Q Q 3 I 4

SW-2

SW-4

Wetland Unit 5

Wetland Unit 5

5 to 6 inches

unknown

December 9, 1992

December 9, 1992

y

2-6) arifl->lfc;

5 (pp. 2-1, 2


j. 20)

I, and2-6) and 16 (p. 38)

The release samples listed above and the background sample were collected from wetland areas borderingthe site that drain to the Back River and, therefore, are from the same depositional environment [ref. no.5 (pp. 2-1, 2-3, 2-6, and 4-5)].

WP51\ARCS\36203301\R-51-8-5-10 23op I PI ft r;" '"*

Sample ID

Sd-21(CHH23)

Sd-22(CHH25)

(MCGX24)

Sd-25(CHH27)

(MCGX28)

Sd-27(MCGX28)

Hazardous Substance

Aroclor 1254

phenanthrene

fluoranthene

pyrene

benz(a)anthracene

chrysene

alpha-chlordane

Aroclor 1254

lead

mercury

nickel

zinc

Aroclor 1254

chromium

lead

nickel

zinc

chromium

lead

mercury

vanadium

zinc

Concentration

220 ug/kg

3,400 ug/kg

8,800 ug/kg

9,600 ug/kg

8,200 ug/kg

760 ug/kg

7.8 (78J)* ug/kg

310(3,100J)*ug/kg

394 mg/kg

1.6 mg/kg

50.4 mg/kg

851 mg/kg

140 ug/kg

70.6 mg/kg

364 mg/kg

51.1 mg/kg

1 ,050 mg/kg

77.2 mg/kg

1 ,060 mg/kg

1.5 mg/kg

104 mg/kg

2,360 mg/kg

SampleQuantitationLimit

79 ug/kg

2,444 ug/kg

2,444 ug/kg

2,444 ug/kg

2,444 ug/kg

2,444 ug/kg

6.3 ug/kg

1 22 ug/kg

16 mg/kg

0.3 mg/kg

10 mg/kg

5 mg/kg

132 ug/kg

3 mg/kg

16 mg/kg

10 mg/kg

5 mg/kg

2 mg/kg

15 mg/kg

0.2 mg/kg

12 mg/kg

5 mg/kg

Reference

5 (pp. 3-36 and B-193)

5 (pp. 3-31 and B-160)

5 (pp. 3-31 and B-160)

5 (pp. 3-31 and B-160)

5 (pp. 3-31 and B-160)

5 (pp. 3-31 and B-160)

5 (pp. 3-36 and B-194)

5 (pp. 3-36 and B-194)

5 (pp. 3-3 and B-15)

5 (pp. 3-3 and B-15)

5 (pp. 3-3 and B-15)

5 (pp. 3-3 and B-15)

5 (pp. 3-36 and B-195)

5 (pp. 3-3 and B-16)

5 (pp. 3-3 and B-16)

5 (pp. 3-3 and B-16)

5 (pp. 3-3 and B-16)

5 (pp. 3-3 and B-17)

5 (pp. 3-3 and B-17)

5 (pp. 3-3 and B-17)

5 (pp. 3-3 and B-17)

5 (pp. 3-3 and B-17)

WPS 1 \ARCS\3620330 UR-S1 -8-5-10 24 A R I O O G 3 6

Sample ID

Sd-1(MCGX03)

Sd-1 5 (CHH07)

(MCGX07)

Sd-24(MGCX09)

Sd-2(CHHl3)

(MCGX12)

Sd-4(CHHl5)

(MCGX14)

Hazardous Substance

chromium

lead

nickel

zinc

chromium

lead

mercury

nickel

zinc

chromium

lead

mercury

nickel

zinc

Aroclor 1254

chromium

lead

mercury

nickel

vanadium

zinc

Aroclor 1254

chromium

mercury

nickel

Concentration

54.1 mg/kg

716 mg/kg

58.3 mg/kg

1 ,220 mg/kg

99.2 mg/kg

288 mg/kg

1.5 mg/kg

84.6 mg/kg

874 mg/kg

145 mg/kg

839 mg/kg

2.2 mg/kg

54.5 mg/kg

1 ,270 mg/kg

15,000 ug/kg

193 mg/kg

436 mg/kg

2.1 mg/kg

74.3 mg/kg

133 mg/kg

1 ,620 mg/kg

280 ug/kg

149 mg/kg

1 .2 mg/kg

102 mg/kg


3 mg/kg

0.9 mg/kg

12 mg/kg

6 mg/kg

2 mg/kg

0.7 mg/kg

0.2 mg/kg

9 mg/kg

5 mg/kg

6 mg/kg

2 mg/kg

0.6 mg/kg

22 mg/kg

1 1 mg/kg

310 ug/kg

2 mg/kg

0.7 mg/kg

0.2 mg/kg

10 mg/kg

12 mg/kg

5 mg/kg

254 ug/kg

2 mg/kg

0.2 mg/kg

9 mg/kg

Reference ' <" >v

5 (pp. 3-2 an&B-S)

5 (pp. 3-2 and B-5)

5 (pp. 3-2 and B-5)

5 (pp. 3-2 and B-5)

5 (pp. 3-2 and B-7)

5 (pp. 3-2 and B-7)

5 (pp. 3-2 and B-7)

5 (pp. 3-2 and B-7)

5 (pp. 3-2 and B-7)

5 (pp. 3-2 and B-8)

5 (pp. 3-2 and B-8)

5 (pp. 3-2 and B-8)

5 (pp. 3-2 and B-8)

5 (pp. 3-2 and B-8)

5 (pp. 3-35 and B-196)

5 (pp. 3-2 and B-9)

5 (pp. 3-2 and B-9)

5 (pp. 3-2 and B-9)

5 (pp. 3-2 and B-9)

5 (pp. 3-2 and B-9)

5 (pp. 3-2 and B-9)

5 (pp. 3-35 and B-198)

5 (pp. 3-2 and B-10)

5 (pp. 3-2 and B-10)

5 (pp. 3-2 and B-10)

WP51 \ARCS\36203301 \R-51 -8-5-10 25> \ R I G O G 3 7

Sample ID

Sd-10 (CHH19)

(MCGX18)

Sd-18 (MCGX20)

SW-10(MCGX17)

SW-15 (MCGX08)

Hazardous Substance

phenanthrene

• fluoranthene

pyrene

benz(a)anthracene

chrysene

benzo(a)pyrene

chromium

nickel

zinc

chromium

nickel

zinc

chromium

lead

nickel

vanadium

zinc

chromium

lead

zinc

Concentration

2,200 ug/kg

5,200 ug/kg

6,800 ug/kg

4,300 ug/kg

3,700 ug/kg

3,500 ug/kg

84.5 mg/kg

64.8 mg/kg

467 mg/kg

96.4 mg/kg

114 mg/kg

934 mg/kg

162 ug/L

458 (550K)f ug/L

198 ug/L

77.4 ug/L

2,390 ug/L

15.4 ug/L

41.8 (50.lK)t ug/L

193 ug/L


892 ug/kg

892 ug/kg

892 ug/kg

892 ug/kg

892 ug/kg

892 ug/kg

3 mg/kg

12 mg/kg

6 mg/kg

2 mg/kg

9 mg/kg

5 mg/kg

10 ug/L

3 ug/L

40 ug/L

50 ug/L

20 ug/L

10 ug/L

3 ug/L

20 ug/L

-NReference

5 (pp. 3-31 and B-VSOp'

5 (pp. 3-31 and B-150)

5 (pp. 3-31 and B-150)

5 (pp. 3-31 and B-150)

5 (pp. 3-31 and B-150)

5 (pp. 3-31 and B-150)

5 (pp. 3-2 and B-12)

5 (pp. 3-2 and B-12)

5 (pp. 3-2 and B-12)

5 (pp. 3-2 and B-13)

5 (pp. 3-2 and B-13)

5 (pp. 3-2 and B-13)

5 (pp. 3-5 and B-36)

5 (pp. 3-5 and B-36)

5 (pp. 3-5 and B-36)

5 (pp. 3-5 and B-36)

5 (pp. 3-5 and B-36)

5 (pp. 3-5 and B-31)

5 (pp. 3-5 and B-31)

5 (pp. 3-5 and B-31)

WPS 1 \ARCS\36203301 \R-51 -8-5-10 26

Sample ID

SW-18 (MCGX19)

SW-22 (MCGX23)

SW-25 (MCGX25)

SW-1 (MCGX04)

SW-2 (MCGX11)

SW-4 (MCGX13)

Hazardous Substance

chromium

lead

nickel

vanadium

zinc

lead

lead

selenium

zinc

chromium

lead

mercury

nickel

zinc

chromium

lead

zinc

chromium

lead

nickel

selenium

vanadium

zinc

Concentration(ug/L)559

973

713

253

10,800

27.6 (33.1 K)f

44.8 (53.8K)f

5.6 (7.3J)

124

227

2,300 (2,760K)f

2.2

213

7,850

30.2

100(120K)t

449

802

2,167(2,600K)t

604

11.5 (14.9J)*

253

5,580

SampleQuantitationLimit (ug/L)

10

3

40

50

20

3

3

5

20

10

3

0.2

40

20

10

3

20

10

3

40

5

50

20

™-"JWfc|5 (pp. ^dFvl?5 (pp. 3-5 and B-37)

5 (pp. 3-5 and B-37)

5 (pp. 3-5 and B-37)

5 (pp. 3-5 and B-37)

5 (pp. 3-6 and B-39)

5 (pp. 3-6 and B-40)

5 (pp. 3-6 and B-40)

5 (pp. 3-6 and B-40)

5 (pp. 3-5 and B-29)

5 (pp. 3-5 and B-29)

5 (pp. 3-5 and B-29)

5 (pp. 3-5 and B-29)

5 (pp. 3-5 and B-29)

5 (pp. 3-5 and B-33)

5 (pp. 3-5 and B-33)

5 (pp. 3-5 and B-33)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

WPS 1 \ARCS\36203301 \R-51 -8-5-10 27flRiUG033

Sample ID

SW-4(MCGX13)

SW-8(MCGX15)

SW-29 (MCGX30)

Hazardous Substance

chromium

lead

nickel

selenium

vanadium

zinc

chromium

lead

nickel

zinc

chromium

zinc

Concentration(ug/L)

802

2,167 (2,600K)!

604

11.5 (14.9J)*

253

5,580

761

1,175 (1,410K)f

111

11,200

20.7

84.8

SampleQuantitationLimit (ug/L)

10

3

40

5

50

20

10

3

40

20

10

20

^vReference W^Afl

5 (pp. 3-5 ano^nfl

5 (pp. 3-5 /jfg'&fe^

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-34)

5 (pp. 3-5 and B-35)

5 (pp. 3-5 and B-35)

5 (pp. 3-5 and B-35)

5 (pp. 3-5 and B-35)

5 (pp. 3-6 and B-42)

5 (pp. 3-6 and 8-42)

A J qualifier indicates that the analyte was present, but the reported concentration may not beaccurate or precise [ref. no. 5 (p. 3-1)]. The direction of bias associated with these J-qualifiedresults is unknown. Therefore, the J-qualified release values have been divided by an analyte-specific factor, making these data eligible for MRS evaluation (ref. no. 23). These adjusted valuesare listed in front of the unadjusted J-qualified results.

A K qualifier indicates that the analyte was present, but the reported value may be biased high [ref.no. 5 (p. 3-1)]. Therefore, the K-qualified release values have been divided by an analyte-specificfactor, making these data eligible for MRS evaluation (ref. no. 23). These adjusted values arelisted in front of the unadjusted K-qualified results.

WP51\ARCS\36203301 \R-51 -8-5-10 28

Attribution:

The substances listed as qualifying for an observed release were detected in surface soil samples atelevated levels relative to background (see Section 2.4.1 of the doc. rec.). ' .

The site was operated as an unpermitted landfill from the early 1950s until 1984 [ref. no. 3 (p. 1)]. Thereare no records of the waste types and quantities accepted by the landfill [ref. no. 3 (p. 2)]. The followingwastes have been observed at the site: scrap metal, wood, tires, paper, junked vehicles, constructiondebris, empty drums, and empty storage tanks [ref. nos. 3 (p. 2), 5 (p. 2-8), 8, and 11 (p. 1)].

The site has been used for scrap metal salvaging [ref. no. 3 (p. 2)]. In addition, approximately 250 emptydrums were removed from the site in 1984 [ref. no. 3 (p. 4)]. Because the contents and handling of thesedrums while they were on site are not known, the drums represent a possible source of contamination [ref.no. 3 (p. 4)].

Hazardous Substances Released:

Aroclor 1254benzo(a)pyrenealpha chlordanechrysenefluoranthenephenanthrenevanadium

benz(a)anthracenechromiumleadnickelseleniumpyrenezinc

Surface Water Observed Release Factor Value: 550

WPS 1 \ARCS\36203301 \R-51 -8-5-10 29

SWOF/Drinking - Toxicity/Persistence

4.1.2.2 WASTE CHARACTERISTICS

4.1.2.2.1 Toxicity/Persistence

HazardousSubstance

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene

bis(2-ethylhexyl) phlhalate


chrysene

chlordane

fluoranthene[benzo(j,k)fluorene]

naphthalene

phenanthrene

phenol

pyrene

chromium

lead

mercury

nickel

selenium

silver

vanadium

zinc

SourceNo.

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

ToxicityFactor Value(ref. no. 2)

10,000

1,000

10,000

100

10

10,000

100

1

1100

110,000

10,000

100

100

100

100

10

PersistenceFactor Value(ref. no. 2)

1

1

1

1

1

1

1

1

0.4

0.4

1

1

1

1

1

1

1

1

1

1

Toxicity/PersistenceFactor Value[ref. no. 1(table 4- 12)]

10,000

1,000

10,000

100

10

10,000

100

0.4

1

100

110,000

10,000

100

100

100

100

10

Toxicity/Persistence Factor Value: 10,000[ref. no. 1 (table 4-12)]

WP51 \ARCS\36203301 \R-51 -8-5-10 30 n '-•' !H. I \ '

SWOF/Drinking - Hazardous Waste

4.1.2.2.2 Hazardous Waste Quantity

Source Number

Source HazardousWaste Quantity Value(Section 2.4.2.1.5)

.

Is source hazardous 'constituent quantitydata complete? (yes/no)

0.62 no

Sum of values: 1 (rounded)Hazardous Waste Quantity Factor Value: 100* [ref. no. 1 (Section 2.4.2.2)]

Because the hazardous constituent quantity is not adequately determined and because targets inthis pathway are subject to actual contamination, a hazardous waste quantity factor value of 100is assigned (see Section 4.1.4.3 of the doc. rec.).

4.1.2.2.3 Waste Characteristics Factor Category Value

10,000 x 100= 1,000,000

Toxicity/persistence factor value Xhazardous waste quantity factor value: 1 x 106

Waste Characteristics Factor Category Value: 32[ref. no. 1 (table 2-7)]

WP51 \ARCS\36203301\R-51-8-5-10 31n P I P Pi " L TH P. i L J .j 4 J

SWOF/Drinking - Targei

4.1.2.3 DRINKING WATER THREAT - TARGETS

Level I Concentrations

Sample ID: N/ASample Medium:Location:Reference:

Hazardous Substance BenchmarkHazardous Substance Concentration Concentration Benchmark

Reference for Benchmarks:

Most Distant Level I Sample

Sample ID: N/ADistance from the probable point of entry:Reference:

Most Distant Level II Sample


K n i r ' r - ' • U UWP51 \ARCS\36203301\R-51-8-5-10 32 A f\ ' u '"* ~

SWOF/Drinking - Nearest Intake

4.1.2.3.1 Nearest Intake

Location of nearest drinking water intake: N/ADistance from the probable point of entry: - - - .., w

Reference: '\ '-•' >

Potential Contamination:

Type of surface water body: - - -

No drinking water intakes have been identified within the 15-mile surface water target distance limit.

Dilution Weight: -

Nearest Intake Factor Value: 0[ref. no. 1 (section 4.1.2.3.1)]

WP51 \ARCS\36203301\R-51 -8-5-10 33

-ASWOF/Drinking - Level I Concentrati*

4.1.2.3.2 Population

4.1.2.3.2.2 Level I Concentrations

Distance Along theIn-Water Segment from the

Intake Probable Point of Entry Population Reference

N/A

Population Servedby Level I Intakes: X 10 = Level I Population Factor Value: 0

WP51\ARCS\36203301\R-51-8-5-10 34

SWOF/Drinking - Level II Concentr,

4.1.2.3.2.3

Intake

Level II Concentrations•0,

Distance Along the In-WaterSegment from the ProbablePoint of Entry Population Reference

N/A

Population Served by Level II Intakes: Level II Population Factor Value: 0

WP51 \ARCS\36203301 \R-51 -8-5-10 35O Q O U 7

SWOF/Drinking - Potential Contamjn^jpn

4.1.2.3.2.4 Potential Contamination

Average Annual PopulationIntake Flow (cfs) Served Reference

N/A

Type of Surface Dilution-Weighted PopulationWater Body Total Population [ref. no. 1 (table 4-14)]

Dilution-Weighted PopulationServed by PotentiallyContaminated Intakes: + 10 = Potential Contamination Factor Value: 0

WP51 \ARCS\36203301 \R-51 -8-5-10 36 ^. p, \ U '- •-> • ^

SWOF/Drinking - Resourc

4.1.2.3.3 Resources

Irrigation (5-acre minimum) of commercial food crops or commercial forage crops

Watering of commercial livestock

Ingredient in commercial food preparation

Major or designated recreation area, excluding drinking water use

Numerous parks are located on the shores of the Back River and the Chesapeake Baywithin the surface water migration pathway (ref. no. 13).

Any portion of the surface water is designated by a state for drinking water use underSection 305(a) of the Clean Water Act as amended

Any portion of the surface water is usable for drinking water purposes

Resources Factor Value: 5[ref. no. 1 (section 4.1.2.3.3)]

WP51 \ARCS\36203301\R-51 -8-5-10 37

SURFACE WATER OVERLAND FLOW/FLOOD MIGRATION PATHWAYDRINKING WATER THREAT SCORE CALCULATION

Targets Summary

Nearest Intake Factor Value:Level I Concentrations Factor Value:Level II Concentrations Factor Value:Potential Contamination Factor Value:Resources Factor Value:

Total Drinking Water Threat Targets Score:

00005

Likelihoodof Release

550

WasteCharacteristics

32

Targets

5

+ 82,500 = 1.07

"Subject to a maximum of 100.00

WP51 \ARCS\36203301 \R-51 -8-5-10 38 ., r ; f; r.: c ,--. i i i <J ~ .. J •-

SWOF/Food Chain - Toxicity/Persistence/Bioaccum

4.1.3.2 WASTE CHARACTERISTICS

4.1.3.2.1 Toxicity/Persistence/Bioaccumulation

HazardousSubstances

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene



chrysene

chlordane


naphthalene

phenanthrene

phenol

pyrene

chromium

lead

mercury

nickel

selenium

silver

vanadium

zinc

SourceNo.

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Toxic ityFactorValue(ref. no. 2)

10,000

1,000

10,000

100

10

10,000

100

1

1

100

110,000

10,000

100

100

100

100

10

PersistenceFactorValue(ref. no. 2)

1

1

1

1

1

1

1

1

0.4

0.4

1

1

1

1

1

1

1

1

1

1

Bioaccu-mulationValue*(ref. no. 2)

50,000

50,000

50,000

50,000

500

500

50,000

5,000

500

50

5

50

500

5,000

50,000

500

5,000

50

0.5

50,000

• : \

Toxicity/Persistence/BioaccumulationFactor Value[ref. no. 1(table 4-1 6)]

5x 108

5 x 107

5x 108

5x 106

5,000

5x 108

5x 10s

200

5

5,000

500

5x 107

5 x 108

50,000

5 x 10s

5,000

50

5x 105

Not listed in Reference No. 2.

Because a portion of the 15-mile surface water migration pathway is brackish, the higher of thefreshwater or saltwater bioaccumulation values is assigned [ref. nos. 1 (Section 4.1.3.2.1.3) and14 (p. 6)].

Toxicity/Persistence/Bioaccumulation Factor Value: 5 x 1 0 ®[ref. no. 1 (table 4-16)]

WP51 \ARCS\36203301 \R-51 -8-5-10 39

SWOF/Food Chain - Hazardous Waste Quantity


Source Number

1 (contaminated soil)

Source HazardousWaste QuantityValue (Section 2.4.2.1.5)

0.62

Is source hazardousconstituent quantitydata complete? (yes/no

no

Sum of values: 1 (rounded)Hazardous Waste Quantity Assigned Value: 100* [ref. no. 1 (Section 2.4.2.2)]

Because the hazardous constituent quantity is not adequately determined and because targets inthis pathway are subject to actual contamination, a hazardous waste quantity factor value of 100is assigned (see Section 4.1.4.3 of the doc. rec.).

4.1.3.2.3 Waste Characteristics Factor Category Value

10,000 x 100 = 1 x 10b

Toxicity/persistence factor valueX hazardous waste quantity factor value: 1 x 106

1 x 106x 50,000 = 5 x 1010

(Toxicity/persistence X hazardous waste quantity)X bioaccumulation potential factor value: 5 x 1 0


WP51 \ARCS\36203301\R-51-8-5-10 40 _ - . ' : • . /

, i I I 'J _ -, J L.

4.1.3.3 HUMAN FOOD CHAIN THREAT - TARGETSV

Actual Human Food Chain Contamination

Surface Water and Sediment Samples

BioaccumulationDistance from Potential

Sample ID Probable Point of Entry Hazardous Substance Factor Value

The wetlands adjacent to the eastern and western perimeters of the site are not documented as fisheries.

Closed Fisheries

Identity of Fishery Hazardous Substance

N/A

Distance fromSample ID Probable Point of Entry Hazardous Substance

N/A

WP51\ARCS\36203301\R-51-8-5-10 41

Berth ic/Tissue

Distance fromSample ID Probable Point of Entry Organism

N/A

Level I Concentrations

Sample ID: N/ASample Medium:Location:Reference:

Hazardous Substance BenchmarkHazardous Substance Concentration Concentration Benchmark

Reference for Benchmarks:

Most Distant Level I Sample


WP51 \ARCS\36203301\R-51 -8-5-10 42

Level I Fisheries

Identity of FisheryExtent of the Level I Fishery(Relative to Probable Point of Entry)

N/A

Most Distant Level II Sample


Level II Fisheries

Identity of FisheryExtent of the Level II Fishery(Relative to Probable Point of Entry)

N/A

WP51\ARCS\36203301\R-51-8-5-10 43 flRi00055

SWOF/Food Chain - Food Chain Indi

4.1.3.3.1 Food Chain Individual

Sample ID: SD-21Hazardous Substance: aroclor 1254Bioaccumulation Potential: 50,000

Dilution WeightType of Surface [ret. no. 1

Identity of Fishery Water Body (table 4-13)] Reference

An observed release is not documented to a fishery. However, the Back River and the Chesapeake Bayare fisheries [ref. no. 17]. Because there is an observed release of a hazardous substance having abioaccumulation factor value of 500 or greater to surface water and there is a fishery within the targetdistance limit, a food chain individual factor value of 20 is assigned [ref. no. 1 (Section 4.1.3.3.1) andSections 4.1.2.1.1 and 4.1.3.2.1 of the doc. rec.].

Food Chain Individual Factor Value: 20[ref. no. 1 (section 4.1.3.3.1)]

WP51\ARCS\36203301\R-51-8-5-10 44 H R I O Q 0 5 6

SWOF/Food Chain - Level I Concentrations

4.1.3.3.2 Population


'%•cv

Identity ofFishery

Annual Production(pounds) Reference

Human Food ChainPopulation Value[ref. no. 1 (table 4-18)]

N/A

Sum of Human Food Chain Population Values: X 10 = Level I Concentrations Factor Value: 0

WP51\ARCS\36203301\R-51-8-5-10 45* 9 I [~J 0 ^ 5 7

SWOF/Food Chain - Level II Concentf&Qn

4.1.3.3.2.2 Level II Concentrations

Identity ofFishery

Annual Production(pounds) Reference

Human Food ChainPopulation Value[ref. no. 1 (table 4-18)]

N/A

Sum of Human Food Chain Population Values: Level II Concentrations Factor Value:

WP51 \ARCS\36203301 \R-S 1 -8-5-10 46 * R i n n n fiK r\ I u u »j <j u

SWOF/Food Chain - Potential

4.1.3.3.2.3 Potential Human Food Chain Contamination

ition

IdentityofFishery

Back River

ChesapeakeBay

AnnualProduction(pounds)

37,200

3,868,973

Type ofSurface WaterBody

Small tomoderatestream

Coastal tidalwater

AverageAnnualFlow

10 to 100

N/A

Reference

see below andSection 4. 1.1.1of the doc. rec.

see below andSection 4. 1.1.1of the doc. rec.

PopulationValue (Pj)[ref. no. 1(table 4- 18)]

31

3,100

DilutionWeight (D,)

0.1

0.0001

P i X D j

3.1

0.31

Sum of P X D: 3.41

Rnfish and oyster/soft clam catch data and blue crab landings for the Back River and the upper middleChesapeake Bay* for the years 1990 to 1994 are given below [ref. no. 17 (pp. 2 and 3)]:

Year

1990

1991

1992

1993

1994

Total

AnnualAverage

Rnfish Catch(pounds)

BackRiver

143,200

26,800

4,100

5,600

5,800

185,500

37,100

Upper MiddleChesapeake Bay

315,600

1,077,000

610,800

502,500

862,400

3,368,300

673,660

Soft Clam/Oyster Catch(pounds)

BackRiver

0

100

400

0

0

500

100

Upper MiddleChesapeake Bay

831,800

588,800

287,400

457,400

261,600

2,427,000

485,400

Blue CrabLandings (pounds)

Upper MiddleCheasapeake Bay

4,284,300

4,981,400

3,279,200

6,024,700

4,945,500

23,515,100

4,703,020

Since the entire length of the Back River falls within the surface water migration pathway due to tidalinfluence (see Section 4.1.1.1 of the doc. rec.), the total catch for the Back River is subject to potentialcontamination.

The area of the upper middle Chesapeake Bay as measured by planimeter is 219 square miles (ref. nos.18 and 23).

* The upper middle Chesapeake Bay is defined as the area of the bay from the Bay Bridge northto the Sassafrass River (ref. no. 24).

WP51 \ARCS\36203301 \R-51 -8-5-10 47; o i n nj rt I u uH i

The area of the portion of the upper middle Cheasapeake Bay within the surface water migral•s measured by planimeter is 145 miles (ref. nos. 18 and 23). The ratio of the portion of theChesapeake Bay within the surface water migration pathway to the total area of the upper middleChesapeake Bay is 145 square miles divided by 219 square miles equals 0.66. The 5-year averages offinfish catch, soft clam/oyster catch, and blue crab landings for the upper middle Cheasapeake Baymultiplied by 0.66 equal 444,616 pounds of finfish, 320,364 pounds of soft clams/oysters, and 3,103,993pounds of blue crab for the portion of the Chesapeake Bay within the surface water migration pathway.

HUMAN FOOD CHAIN PRODUCTION SUMMARY FOR SURFACE WATER MIGRATION PATHWAY

Description

Finfish Catch (pounds)

Soft Clam/Oyster Catch(pounds)

Blue Crab Landings (pounds)

Total Pounds

Back River

37,100

100

37,200

Chesapeake Bay

444,616

320,364

3,103,993

3,868,973

(Sum of = Potential Human Food Chain Contamination Factor Value: 0.341[ref. no. 1 (section 4.1.3.3.2.3)]

WP51\ARCS\36203301\R-51-8-5-10 48 ». p i n n n £ i'M n i <u> j U D L

SURFACE WATER OVERLAND FLOW/FLOOD MIGRATION PATHWAYHUMAN FOOD CHAIN THREAT SCORE CALCULATION

Targets Summary

Food Chain Individual Factor Value:Level I Concentrations Factor Value:Level II Concentrations Factor Value:Potential Contamination Factor Value:

Total Human Food Chain Threat Targets Score:

20000.341

20.341

Likelihoodof Release

550

WasteCharacteristics

320

Targets

20.341 = +82.500 = 43.39*

* Subject to a maximum of 100.00

WP51\ARCS\36203301\R-51-8-5-10 49

SWOF/Environment - Toxicity/Persistence/Bioaccumulatioi

4.1.4.2 WASTE CHARACTERISTICS *%

4.1.4.2.1 Ecosystem Toxicitv/Persistence/Bioaccumulation

HazardousSubstance

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene



chrysene

chlordane*


naphthalene

phenanthrene

phenol

pyrene

chromium

lead

mercury

nickel

selenium /•

silver /// t

vanadium s^v"

zinc

SourceNo.

1

1

1

1

1

1

1

1

!

1

1

1 ^1

1 *~^

1 //~)\1NOY

-1^V .S

T^N. ^

-1 / :

•tw.

EcosystemToxicityFactorValue*(ref. no. 2)

10,000

10,000

10,000

1,000

1,000

10,000

10,000 /

1 0,000, / '

i,«d >i/a ,/710>QpK

' — *^Vy

V^V*^Vo^o

-sjd^oo"V;ooo•v 100e

10,000

100

100

PersistenceFactorValue(ref. no. 2)1

1

1

1

1

1

y 1\ 1

0.4

1

1

1

1

1

1

1

1

1

1

Ecosystem Toxicity/PersistenceFactor Value[ref. no. 1(table 4-20)]

10,000

10,000

10,000

1,000

1,000

1,000

10,000

10,000

1,000

1,000

10,000

10

1,000

10,000

1,000

100

10,000

100

100

Because a portion of the 15-mile surface water migration pathway is brackish, the higher of thefreshwater or saltwater ecosystem toxicity values is assigned [ref. nos. 1 (Section 4.1.3.2.1.3) and14 (p. 6)].

WP51\ARCS\36203301\R-51-8-5-10 50A R I C 0 0 6 2

HazardousSubstance

Aroclor 1254

benz(a)anthracene

benzo(a)pyrene

bis(2-ethylhexyl)phthalate


chrysene

chlordane


naphthalene

phenanthrene

phenol

pyrene

chromium

lead

mercury

nickel

selenium

silver

vanadium

zinc

Ecosystem Toxicity/PersistenceFactor Value

10,000

10,000

10,000

1,000

1,000

10,000

10,000

10,000

1,000 </N

1 ,000 //

10,000 NN*

/""*""***•-*

10 YW1"1"1,000 /"**N \ Nlo.ooK / N

1£OO^V.\

•4.9,000, /100^ -

100

EcosystemBioaccumulationFactor Value(Section 4.1.3.2.1.3)(ref. no. 2)

50,000

50,000

50,000

50,000

500

5,000

50,000

/ °°

v/ QQbV

^ 5,000

<x5

•

-' 500

5,000

50,000

500

5,000

50

0.5

50,000

Ecosystem ToxicgW ^^9Persistence/ /iL /lBioaccumulation ^*qtj *Factor Value[ref. no. 1(table 4-21)]

5x108

5x 108

5x 108

5x 107

5 x 10s

5x107

5x 108

5x 107

5x10 6

5x 106

50,000

5,000

5x 106

5x 108

5x105

5x 105

5x 105

50

5x 106

Because a portion of the 15-mile surface water migration pathway is brackish, the higher of thefreshwater or saltwater ecosystem bioaccumulation factor values is assigned [ref. nos. 1 (Section4.1.3.2.1.3) and 14 (p. 6)].

Ecosystem Toxicrty/Persistence/Bioaccumulation Factor Value: 5 x 108

[ref. no. 1 (table 4-21)]

WP51 \ARCS\36203301 \R-51 -8-5-10 51 A R I 0 0 0 6 3

SWOF/Environmental - Hazardous Waste Quantiwy/


Source Number

Source HazardousWaste QuantityValue (Section 2.4.2.1.5)

Is source hazardousconstituent quantitydata complete?(yes/no)

0.62 no

Sum of values: 1 (rounded)//Hazardous Waste Quantity Factor Value: 100' O- [ref. no. 1 (Section 2.4.2.2)]

Because the hazardous constituent quantofy/s p6t adequately determined and because targets inthis pathway are subject to actual contarniratiojr a hazardous waste quantity factor value of 100is assigned (see Section 4.1.4.3 of the doc 8<;J>..

4.1.4.2.3 Waste Characteristics/Fj r Calf gory Value

10,000x100

1 x 106x 50,000 =

Ecosystem toxicity/persistence factor valueX hazardous waste quantity factor value: 1 x 106

(Ecosystem toxicity/persistence X hazardous waste quantity]X bioaccumulation potential factor value: 5x10"


WP51 \ARCS\36203301 \R-51-8-5-10 52

SWOF/Environment -

4.1.4.3 ENVIRONMENTAL THREAT - TARGETS

Actual Environmental Contamination

Sample ID: SW-10Sample Medium: Surface water (brackish)Location: Wetland Unit 4Reference: 5 (pp. 2-6, 3-5, and 4-5)

Hazardous Substance

chromium

lead

nickel

vanadium

zinc

Hazardous SubstanceConcentration (ug/L)

162

458 (550)Kf

198

77.4

2,390 />

Benchmark*Concentration (ug/L)

210

3.2

X^/v''XNv* se'x^

Benchmark

Ambient Water QualityCriteria (AWQC)/Ambient Aquatic LifeAdvisory Concentration(AALAC)

Sample ID: SW-15Sample Medium: Surface water (fresh)Location: Wetland Unit 3Reference: 5 (pp. 2-6, 3-5, and 4

Hazardous Substance

x;'Hazardous Substance

jrioenjratlon (ug/L)Benchmark*Concentration (ug/L) Benchmark

chromium

lead

zinc

15.4^ -"'

41.8(50.1 K)f

193

210

3.2

110

AWQC/AALAC

The lower of the freshwater or saltwater values is assigned [ref. no. 1 (table 4-22)].

A K qualifier indicates that the analyte was present, but the reported value may be biased high [ref.no. 5 (p. 3-1)]. Therefore, the K-qualified release values have been divided by an analyte-specificfactor, making these data eligible for HRS evaluation (ref. no. 23). These adjusted values arelisted in front of the unadjusted K-qualified results.

WPS 1 \ARCS\36203301 \R-51 -8-5-10 53 A R 1 0 G 0 6 5

SWOF/Environment - Targets



Sample ID: SW-18Sample Medium: Surface water (fresh)

\ Location: Wetland Unit 3Reference: 5 (pp. 2-6, 3-5, and 4-5)

Hazardous Substance

chromium

lead

nickel

vanadium

zinc


559

973

713

253

10,800 /


210

3.2

A

f^>

Benchmark

AWQC/AALAC

Sample ID: SW-22Sample Medium: Surface water (fresh)Location: Channel connecting Wetland UnitReference: 5 (pp. 2-6, 3-6, and 4-5)

itland Unit 3

Hazardous SubstanceBenchmark*Concentration (ug/L) Benchmark

lead K)f 3.2 AWQC/AALAC

The lower of the freshwater or saltwater values is assigned [ref. no. 1 (Table 4-22)].


WP51 \ARCS\36203301 \R-51 -8-5-10 54 A R I 0 0 0 6 6



SWOF/Environment - Targ

Sample ID: SW-25Sample Medium: Surface water (fresh)Location: Wetland Unit 1Reference: 5 (pp. 2-6, 3-6, and 4-5)

Hazardous Substance

lead

selenium

zinc

Hazardous SubstanceConcentration (ppb)

44.8 (53.8K)f

7.3J

124

BenchmarkConcentration (ppb)

3.2

36

/ft

Benchmark

AWQC/AALAC


Hazardous Substance

chromium

lead

mercury

nickel

zinc

HazardotfCFbbstance,Conce0u«io)i jgbbi/

227 NsvC ""

fc^OtrtZ^oft)*/ / ^\

^ , / ?213 '^^

7,850

Benchmark*Concentration (ppb)

210

3.2

0.012

8.3

86

Benchmark

AWQC/AALAC


A K qualifier indicates that the anahyte was present, but the reported value may be biased high [ref.no. 5 (p. 3-1)]. Therefore, the K-qualified release values have been divided by an analyte-specificfactor, making these data eligible for HRS evaluation (ref. no. 23). These adjusted values arelisted in front of the unadjusted K-qualified results.

WP51 \ARCS\36203301 \R-51 -8-5-10 55 A R I 0 0 0 6 7

SWOF/Environment -




Hazardous Substance

chromium

lead

mercury

zinc


30.2

100(120K)f

0.26

449


210

3.2

flftH2

//8pN

Benchmark

AWQC/AALAC


Hazardous Substance

chromium

lead

nickel

selenium

vanadium

zinc

HazacdoCsSUhsta^ceConcentoaJio^ug/L)

/^"^vN4j67 (2,^OOK)t

604 ~^/

11.5(14.9J)n

253

5,580


210

3.2

8.3

36

86

Benchmark

AWQC/AALAC

tt



A J qualifier indicates that the analyte was present, but the reported concentration may not beaccurate or precise [ref. no. 5 (p. 3-1)]. The direction of bias associated with these J-qualifiedresults is unknown. Therefore, the J-qualified release values have been divided by an analyte-specific factor, making these data eligible for HRS evaluation (ref. no. 23). These adjusted valuesare listed in front of the unadjusted J-qualified results.

WP51 \ARCS\36203301 \R-51 -8-5-10 56 A R I 0 0 0 6 8

SWOF/Environment - Targets



Sample ID: Sd-4Sample Medium: SedimentLocation: Small feeder tributary on eastern border of site (Wetland Unit 5)Reference: 5 (pp. 2-6, 3-2, 3-35, and 4-5)

Hazardous SubstanceHazardous SubstanceConcentration

BenchmarkConcentration Benchmark

Aroclor 1254

chromium

mercury

nickel

280 ug/kg

149 mg/kg

1.2 mg/kg

102 mg/kg

N/A N/A

Sample ID: Sd-10Sample Medium: SedimentLocation: Wetland on western border of site (WefWhd Unit 4)Reference: 5 (pp. 2-6, 3-2, 3-31, andXjgN \\

Hazardous SubstanceHaztfifaous Sqp&tance

^Ohcenkation (ppb)BenchmarkConcentration (ppb) Benchmark

phenanthrene

fluoranthene

pyrene

benz(a)anthracene

chrysene

benzo(a)pyrene

chromium

nickel

zinc

S»£bO ug/kg N/A N/A

5,200 u§/kg

6,800 ug/kg

4,300 ug/kg

3,700 ug/kg

3,500 ug/kg

84.5 mg/kg

64.8 mg/kg

467 mg/kg

WPS 1 \ARCS\36203301 \R-51 -8-5-10 57 A R I 0 0 0 6 9

SWOF/Environment - Tai



Sample ID: Sd-18Sample Medium: SedimentLocation: Wetland on western border of site (Wetland Unit 3)Reference: 5 (pp. 2-6, 3-3, and 4-5)

Hazardous Substance

chromium

nickel

zinc

Hazardous SubstanceConcentration (mg/kg)

96.4

114

934

BenchmarkConcentration

N/A

/^

Benchmark

N/A

Sample ID: Sd-21Sample Medium: SedimentLocation: Drainage channel between WetlReference: 5 (pp. 2-6, 3-36, and 4-5)

Wetland Unit 3

Hazardous Substance

Aroclor 1254

Hazardquvejrosrawce( jjc^7r tio?Kmg/kg)S ..— ss, % "V

/t X>Ny_ *"» ?

v " S. /

XV

Benchmarki Concentration

N/A

Benchmark

N/A

WP51 \ARCS\36203301 \R-51 -8-5-10 58 & R I 0 0 0 7 0

SWOF/Environment •*



Sample ID: Sd-22Sample Medium: SedimentLocation: Drainage channel between Wetland Unit 2 and Wetland Unit 3Reference: 5 (pp. 2-4, 2-6, 3-3, 3-31, 3-36, and 4-5)

Hazardous Substance

phenanthrene

fluoranthene

pyrene

benz (a)ant hracene

chrysene

alpha chlordane

Aroclor 1254

lead

mercury

nickel

zinc

Hazardous Substance BenchmarkConcentration Concentration Benchmark

3.400 ug/kg N/A N/A

8,800 ug/kg

9,600 ug/kg /*>/ C

8,200 ug/kg //""Ov

7,600 ug/kg /J >s/"

78J ug/kg OC/*"

3.100J ug/kg ^SN^

394 mg/kg \\^^"-^

1.6 mg/kg \//

50.4 m(Ag* \ 1-sN/

851 moW/^

Sample ID: Sd-25Sample Medium: Sediment ,». ..Location: Wetland Unit 2 - Large PoTidReference: 5 (pp. 2-4, 2-6, 3-3, 3-36, and 4-5)

Hazardous Substance

Aroclor 1 254

chromium

lead

nickel

zinc

Hazardous SubstanceConcentration

140 ug/kg

70.6 mg/kg

364 mg/kg

51.1 mg/kg

1 ,050 mg/kg


N/A

Benchmark

N/A

WP51\ARCS\36203301\R-51-8-5-10 59 flRIOOO?

SWOF/Environment -



Sample ID: Sd-27Sample Medium: SedimentLocation: Small feeder tributary on eastern border of site (Wetland Unit 5)Reference: 5 (pp. 2-3, 2-6, 3-3, and 4-5)

Hazardous Substance

chromium

lead

mercury

vanadium

zinc


77.2

1,060

1.5

104

2,360 /S


N/A

/ //<wx

* \^

Benchmark

N/A

WP51 \ARCS\36203301\R-51-8-5-10 60A R I 0 0 0 7 2




Sample ID: Sd-1Sample Medium: SedimentLocation: Small feeder tributary on eastern border of site (Wetland Unit 5)Reference: 5 (pp. 2-6, 3-2, and 4-5)

Hazardous Substance

chromium

lead

nickel

zinc


54.1

716

58.3

1,220i

A


N/A

A>

Benchmark

N/A

Sample ID: Sd-15Sample Medium: SedimentLocation: Wetland on western border of siteReference: 5 (pp. 2-6, 3-2, 3-35, and/£

Hazardous Substance

fndUnit 3)

HazSraous Sqratanceehka ion (mg/kg)

BenchmarkConcentration Benchmark

chromium

lead

mercury

nickel

zinc

N/A N/A

288

1.5

84.6

874

WP51 \ARCS\36203301 \R-51 -8-5-10 61 flRI00073




Sample ID: Sd-24Sample Medium: SedimentLocation: Wetland on western border of site (Wetland Unit 1)Reference: 5 (pp. 2-6, 3-2, and 4-5)

Hazardous Substance

chromium

lead

mercury

nickel

selenium

zinc

Hazardous Substance BenchmarkConcentration (mg/kg) Concentration

145 N/A

839

2.2 A

54.5 />\V

16.1 /y ^s/1,270 /C/7

Benchmark

N/A

Sample ID: Sd-2Sample Medium: SedimentLocation: Wetland on eastern border,Reference. 5 (pp. 2-6, 3-2, 3-35, ar

Unit 5)

Hazardous Substance

Aroclor 1254

chromium

lead

mercury

nickel

vanadium

zinc

/^N^yrtazardoys Substance Benchmark^concentration Concentration

15,000.ug/kg N/A

1 93 mg/kg

436 mg/kg

2.1 mg/kg

74.3 mg/kg

133 mg/kg

1 ,620 mg/kg

Benchmark

N/A

WP51\ARCS\36203301\R-51 -8-5-10 62 A R I 0 0 0 7 1 *

4.1.4.3.1 Sensitive Environments


SWOF/Environment - Level I Concentration'

\,<**

Sensitive Environments

Sensitive Environment

Distance from ProbablePoint of Entry to NearestPoint of SensitiveEnvironment Reference

SensitiveEnvironmentValue(s)[ref. no. 1 (table 4-23)]

Unnamed tributary oneastern border of site(state-designated area forprotection or maintenanceof aquatic life)

Unnamed tributary onwestern border of site(state-designated area forprotection or maintenanceof aquatic life)

Ofeet

Ofeet

Wetlands

Wetland

5 (p. 2-6). 19 (p.19), and doc.rec. (Section4.1.4.3)

:-6), 19 (p.and doc.

lection4.1M-8)

Sum of Sensitive Environments Value: 10

_/"^\Wetland Frontage Reference

Drainage channel between '^ -Wetland Units 2 and 3 (palustrine.wetland, unconsolidated bottom),Wetland Unit 3 (palustrineemegrent wetland), Wetland Unit4 (estaurine intertidal emergentwetland), and Wetland Unit 5(estaurine intertidal emergentwetland)

m''e5 (pp. 4-8, 4-9, and 4-10), 12, anddoc. rec. (Section 4.1.4.3)

Total Wetland Frontage: 0.25 mile

Wetland Value: 25[ref. no. 1 (table 4-24)]

Sum of Sensitive Environments Value + Wetland Value: 35X 10 = Level I Concentrations Factor Value: 350

WP51\ARCS\36203301\R-51-8-5-10 63A R I 0 0 0 7 5

4.1.4.3.1.2 Level II Concentrations


SWOF/Environnnent - Level II Concei

Sensitive Environment

Distance from ProbablePoint of Entry to NearestPoint of SensitiveEnvironment Reference

SensitiveEnvironmentValue(s)[ref. no. 1 (table 4-23)]

Pond on northwesternborder of site (state-designated area forprotection andmaintenance of aquaticlife)

4 (p. 2-6), 19 (p. 19),and doc. rec. (Section4.1.4.3)

Wetlands

Wetland

Sum of Sensitive Environments Value: 5

ontage Reference

Wetland Units 1 (palustrineemergent wetland) and WetUnit 2 (palustrine emergewetland) ^x^ •-> f

Wetland Unit 5 (estuarine intertidal - 30 feetemergent wetland)

5 (pp. 4-7 and 4-8), 12, and doc.rec. (Section 4.1.4.3)

5 (p. 4-10), 12, and doc. rec.(Section 4.1.4.3)

Total Wetland Frontage: 840 feet = 0.16 mile

Wetland Value: 25[ref. no. 1 (table 4-24)]

Sum of Sensitive Environments Value + Wetland Value: 30 = Level II Concentrations Factor Value: 30

WP51 \ARCS\36203301 \R-51-8-5-10 64 A R I 0 0 0 7 6

4.1.4.3.1.3 Potential Contamination

SWOF/Environment - Potential Contaminate


Type of SurfaceWater Body Sensitive Environment Reference

SensitiveEnvironment Value(s)[ref. no. 1 (table 4-23)]

Small to moderatestream (Back River)

Coastal tidal water(Chesapeake Bay)

State-designated areafor protection ormaintenance of aquaticlife

Terrestrial area utilizedfor breeding by large ordense aggregations ofanimals (ColonialNesting Waterbird Site atEdgemere)

State-designated area/"/ 13 afor protection or - fmaintenance of aqlife

13 and 19 (p. 19)

13 and 20 (p. 1)

Terrestrial anfor breeding bydense

9 (p. 19)

_Spawning area criticalfor the maintenance offish species withincoastal tidal water

State land designated forwildlife of gamemanagement (historicwater fowl staging andconcentration areas atRamona Beach, ShallowCreek, and Copeland toRock Hall)

13 and 20 (p.1)

13 and 14 (pp. 36 and37)

13 and 20 (p. 1)

75

75x3

75

25x3

WP51\ARCS\36203301\R-51-8-5-10 65

A R I 0 0 0 7 7

Type of SurfaceWater Body Sensitive Environment Reference

SensitiveEnvironment Valye($)[ref. no. 1 (table'£$3)1

Coastal tidal water(Chesapeake Bay)

Wetlands

Type of SurfaceWater Body

Habitat known to beused by state-designatedendangered orthreatened species(Black Marsh: tickseedsunflower, AgalinisFasciculate, white-breasted boneset, andKoehnes' ammannia)

Habitat known to beused by species underreview as to its federalendangered orthreatened status (BlackMarsh: black rail)

18 and 20 (p. 2) 5 0 x 4

18and20(p.2) 50

State-designated natural/,area (Hart-Miller X*Pleasure Island Natujm/Resources Manage/napt/_,Area)

//25

Reference

Wetlands Value for Typeof Surface Water Body[ref. no. 1 (table 4-24)]

Back River (small tomoderate stream)

Chesapeake Bay(coastal tidal water)

8.4 mire's,'v'

21

21

75

250

WPS 1 \ARCS\3620330 Ufl-51 -8-5-10 66flRI00078

SURFACE WATER OVERLAND FLOW/FLOOD MIGRATION PATHWAYENVIRONMENTAL THREAT SCORE CALCULATION

Targets Summary

Level 1 Concentrations Factor Value:Level II Concentrations Factor Value:Potential Contamination Factor Value:

Total Environmental Threat Targets Score:

Likelihood Wasteof Release X Characteristics X

350300.81005

380.81005

Targets

550 320 320.81005 = + 82.500 = 684.39*

* Subject to a maximum of 60

SURFACE WATER OVERLAND FLOW/FLOOD l fijY»O>[ ATHWAY SCORE CALCULATION

Drinking WaterThreat Score

1.07

Human Food ChThreat Score

43.39

EnvironmentalThreat Score =

60

Pathway Score*

104.46

\ \ * Pathway score subject to a maximum of 1 00

WP51 \ARCS\36203301 \R-51 -8-5-10 68 A R 1 0 0 0 7 9

Type of SurfaceWater Body

Sum of SensitiveEnvironmentValues (S,)

Wetland FrontageValue (W,) Dilution Weight (D) Dj (W,

Back River (small 5to moderatestream)

Chesapeake Bay 755(coastal tidal water)

75

250

0.1

0.0001

8

0.1005

Sum of D: (W: + S:): 8.1005

[Sum of D: (W: + S|)]/10: 0.81005 = Potential Contamination Factor Value: 0.81005

WP81 \ARCS\36203301 \R-51 -8-5-10 67 A R I 0 0 0 8 0

PLANIMETER CALCULATION SHEET FOR POTENTIAL HUMAN FOOD CHAIN CONTAMINAT

Planimeter Information

Manufacturer: LaSicoModel: L30Tracer Arm Setting: 16.0Planimeter Unit (u): 0.089091 cm2

Trial No.

1

2

3

4

5

Sum

N

Area*

Number of Planimeter Units (N)

Upper Middle Chesapeake Bay

6,365

6,357

6,395 /£

6.397 _<^XX

6,3Z6//V

31 .W^

/"wza^N^568.2 i ^ymjz)

Area Within Migration Pathway

4,211

4,208

4,216

4,210

4,213

21,058

4,212

375.3 km2 (145 mi2)

Area CaxN

Ca

Ca

Area

Sc is the map scalev ^*

- x 0.089 cm2 = 0.089 km2

N

WP61\ARCS\36203301\R-51-8-5-10 69 & R 1 0 0 0 8 I

:as: halliburton nus a r i n n n o · project no. 3620-33 epa dsn md-181 facility id no....

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