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PUBLIC HEALTH ASSESSMENT

BAY CITY MIDDLEGROUNDS
BAY CITY, BAY COUNTY, MICHIGAN

APPENDIX A.

FIGURES

Figure 1
Figure 1. Site Location

Figure 2
Figure 2. Site Features


APPENDIX B.

TABLES

LIST OF TABLES

1. Population Demographics within 1 mile of the Bay City Middlegrounds Landfill (1990 Census Data).

2. Contaminants of concern at the Bay City Middlegrounds Landfill site.

3. Groundwater concentrations of contaminants of concern, from MDNR investigations (1986-8), the RI (1989, 1990, 10/92), and the ESI (4/92).

4. Concentrations of contaminants of concern in leachate samples from the Bay City Middlegrounds Landfill, 1985-1988.

5. On-site surface soil concentrations of contaminants of concern, from the ESI, 1992.

6. On-site subsurface soil concentrations of contaminants of concern, from the RI (1990, 10/92) and the ESI (4/92).

7. Concentrations of contaminants of concern in the air at the Bay City Middlegrounds Landfill, from the RI, August 8-18, 1989.

8. Concentrations of contaminants of concern in air samples collected near the BCM site by the MDNR Air Quality Division, November 11, 1992.

9. Concentrations of volatile contaminants of concern in samples of soil gas from the BCM site, collected during Phase III of the RI during September and October 1992.

10. Concentrations of contaminants of concern found in a residential well north of the Bay City Middlegrounds Landfill, October 1988.

11. Off-site shallow sub-surface soil concentrations of contaminants of concern, from the ESI, 1992.

12. Concentrations of contaminants of concern in surface water of the Saginaw River near the BCM site, from MDNR investigations (1988, 8/89), the RI (1989), and the ESI (1992).

13. Concentrations of PCBs in surface water samples collected from the Saginaw River and Saginaw Bay, August 1989.

14. Concentrations of PCBs in surface sediment samples collected from the Saginaw River near Middleground Island, 1988.

15. Concentrations of PCBs in subsurface sediment samples collected from the Saginaw River downstream from Middleground Island, 1988.

16. Concentrations of contaminants of concern in the sediment of the Saginaw River near the BCM site, from the RI (1989) and the ESI (1992).

17. Contaminants in fish collected from the Saginaw River near the BCM site, 1986, 1992.

18. Preliminary Age-Adjusted Incidence and Death Rates for Cancer of All sites by County, Michigan Residents, 1990-1992.

19. Number of New Cases of Cancer of All Sites and Age Adjusted Rates for Selected Zip Codes, 1990-1993.


Table 1. Population Demographics within 1 mile of the Bay City Middlegrounds Landfill (1990 Census Data).
Classification Population
Total Population 7,635
White 7,132
Black 116
Native American 57
Asian 25
Other 286
Hispanic 536
Age Less Than or Equal to 6 Years 827
Age Greater Than or Equal to 65 Years 1,446
Females 15-44 Years 1,695

Reference: 11

Calculated using an area-proportion spatial analysis technique.

Table 2. Contaminants of concern at the Bay City Middlegrounds Landfill site.
VOLATILE ORGANIC CHEMICALS
(VOCS)

benzene
bromodichloromethane
bromomethane
1,3-butadiene
carbon tetrachloride
chlorobenzene
chloroethane
chloroform
chloromethane
1,1-dichloroethane
1,2-dichloroethane
1,1-dichloroethylene
1,2-dichloroethylene
1,3-dichloropropylene
ethylbenzene
methylene chloride
styrene
1,1,2,2-tetrachloroethane
tetrachloroethylene
toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
trichloroethylene
vinyl chloride
xylenes

PESTICIDES AND POLYCHLORINATED BIPHENYLS
(PCBs)

aldrin
alpha-BHC
delta-BHC
gamma-BHC
gamma-chlordane
4,4'-DDD
dieldrin
heptachlor epoxide
PCBs

OTHER SEMI-VOLATILE ORGANIC CHEMICALS
(SVOCs)

benzidine (dibenzothiophene)15
carbazole
dibenzofuran
1,3-dichlorobenzene
1,4-dichlorobenzene
hexachlorobenzene
hexachlorobutadiene
4-methylphenol
1,2,3,4-tetrachlorobenzene
1,2,4-trichlorobenzene

POLYNUCLEAR AROMATIC HYDROCARBONS
(PAHs)

acenaphthylene
benzo(a)anthracene
benzo(a)pyrene
benzo(b)fluoranthene
benzo(g,h,i)perylene
benzo(k)fluoranthene
chrysene
dibenzo(a,h)anthracene
indeno(1,2,3-c,d)pyrene
2-methylnaphthalene
naphthalene
phenanthrene

METALS

antimony
arsenic
barium
beryllium
cadmium
chromium
cobalt
copper
lead
manganese
mercury
nickel
vanadium
zinc


Table 3. Groundwater concentrations of contaminants of concern, from MDNR investigations (1986-8), the RI (1989, 1990, 10/92), and the ESI (4/92).
Chemical Date Maximum Concentration
(ppb)
Reference Comparison Value
(ppb)
benzene 1986 3 14 1C
1987 13 15
1988 29.3 15
1989 90 1
1990 210 7
4/92 6.J 3
10/92 13,020 8
bromodichloromethane 1989 8 1 200E, 0.6C
bromomethane 10/92 56 8 10R
chlorobenzene 1990 200 7 200R
10/92 20 8
chloroethane 10/92 143 8 NA
chloroform 1987 250 14 100E, 6C
1989 29 1
1990 9 7
10/92 470 8
chloromethane 1987 18 14 3A
10/92 5,264 8
1,1-dichloroethane 10/92 10 8 carcinogen
1,2-dichloroethane 10/92 3,860 8 0.4C
1,1-dichloroethylene 10/92 407 8 90E, 0.06C
1,2-dichloroethylene (total) 1988 540,000 15 70A (cis);  200R (trans)
1989 840,000 1
1990 21,000 7
(trans) 10/92 0.08 8
trans-1,3-dichloropropylene 10/92 1,830 8 carcinogen
ethylbenzene 1986 7 14 1,000R
1987 680 15
1988 76.7 15
1989 2,000 1
1990 91 7
4/92 24 3
10/92 44 8
methylene chloride 1987 220,000 15 600E, 5C
1988 1,524 15
1989 1,200,000 1
1990 930,000 7
10/92 1,735,390 8
styrene 10/92 5,640 8 carcinogen
1,1,2,2-tetrachloroethane 10/92 0.6 8 0.2C
tetrachloroethylene 10/92 1,570 8 0.7C
toluene 1986 9 14 2,000R
1987 4,200 15
1988 1,200 15
1989 10,000 1
1990 3,000 7
4/92 2.J 3
10/92 90,400 8
1,1,2-trichloroethane 10/92 400 8 0.6C
trichloroethylene 1987 220,000 15 3C
1988 38,500 15
1989 200,000 1
1990 110,000 7
10/92 401,770 8
vinyl chloride 1988 1,450 15 0.2E, carcinogen
1989 21,000 1
1990 90 7
10/92 2,273 8
xylenes (total) 10/92 675,000 8 2,000Ei
benzo(a)pyrene 1987 15 15 0.005C
1990 1.8 7
4/92 4.J 3
benzo(k)fluoranthene 1987 8.1 15 carcinogen
4/92 7.J 3
chrysene 1990 2.1 7 carcinogen
4/92 8.J 3
2-methylnaphthalene 4/92 16 3 NA
naphthalene 1987 310 15 20A
1988 36 15
1989 50 1
1990 51 7
4/92 35 3
10/92 9 8
phenanthrene 1987 170 15 NA
1988 9 15
1990 21 7
4/92 20 3
10/92 0.6 8
carbazole 4/92 3.J 3 NA
di-n-octylphthalate 10/92 6.3 8 NA
PCBs 1987 320,000 15 0.2E, 0.005C
1988 67,000,000 15
1989 930,000 1
1990 5,900,000 7
4/92 94.P 3
10/92 26 8
aldrin 1990 0.075 7 0.3E, 0.002C
alpha-BHC 4/92 0.032JP 3 0.006C
gamma-BHC 1990 150 7 3R, carcinogen
10/92 0.064 8
delta-BHC 1987 0.05 15 NA
1990 0.082 7
gamma-chlordane 1990 0.039 7 0.03C
4,4'-DDD 1990 34 7 0.1C
dieldrin 1990 0.013 7 0.5E, 0.002C
heptachlor epoxide 1990 0.081 7 0.004C
1,4-dichlorobenzene 1987 12 14 75MCLG, carcinogen
1988 4.5 15
1990 43 7
4/92 39 3
10/92 1.4 8
hexachlorobenzene 1990 0.038 7 8E, 0.02C
hexachlorobutadiene 1990 1.7 7 0.04C
1,2,3,4-tetrachlorobenzene 1990 0.16 7 NA
1,2,4-trichlorobenzene 1988 19 15 100R
1990 140 7
4-methylphenol 4/92 1 3 carcinogen
arsenic 1986 140 14 3E, 0.02C
1987 236 15
1990 0.367 7
10/92 6 8
barium 1988 2,200 15 700R
1989 3,200 1
4/92 3,340 3
10/92 821 8
chromium 1987 45 15 10,000R (III)
50R, 3C (VI)
1989 7 1
1990 0.46 7
4/92 6.J 3
cobalt 1990 0.16 7 NA
copper 1987 25 15 1,300MCLG
1988 25 15
1989 4 1
1990 0.51 7
4/92 94.2 3
10/92 30 8
lead 1987 290 14 15PL, carcinogen
1989 96 1
1990 1.9 7
4/92 12.3 3
mercury 1990 0.0005 7 2A
nickel 1987 77 15 100A, carcinogen
1988 110 15
1989 100 1
1990 0.37 7
4/92 54.4 3
zinc 1987 27,000 15 3,000R
1988 23,000 15
1989 20,000 1
1990 207 7
4/92 5,960 3
10/92 14,700 8

Only chemicals that were detected are listed
Bolded chemicals exceed comparison values.
J – Estimated Concentration: below Contract Required Detection Level, but above Instrument Detection Limit
(III) – For chromium(III)
(VI) – For chromium(VI)
NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available
Comparison Value Bases
E – ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei – ATSDR EMEGs, intermediate-duration exposure
R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
A – U.S. EPA Drinking Water Lifetime Health Advisory
MCLG– U.S. EPA Safe Drinking Water Act Maximum Contaminant Level Goal
PL – U.S. EPA Proposed Action Level for Lead in Drinking Water
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 4. Concentrations of contaminants of concern in leachate samples from the Bay City Middlegrounds Landfill, 1985-1988.
Chemical Date Maximum Concentration
(ppb)
Comparison Value
(ppb)
benzene 1985 5 1C
1988 8.9
1,2-dichloroethylene (total) 1985 22 70A (cis)
200R (trans)
ethylbenzene 1985 8.5 1,000R
1988 20.7
toluene 1985 23 2,000R
1988 37.9
naphthalene 1988 6.5 20A
1,4-dichlorobenzene 1988 7.9 75MCLG, carcinogen
barium 1988 207 700R
chromium 1985 160 10,000R (III)
50R, 3C (VI)
nickel 1985 470 100A, carcinogen
1988 150
zinc 1985 21,000 3,000R

Reference: 15

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

(III) – For chromium(III)
(VI) – For chromium(VI)
NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
A – U.S. EPA Drinking Water Lifetime Health Advisory
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 5. On-site surface soil concentrations of contaminants of concern, from the ESI, 1992.
Chemical Maximum Concentration
(ppm)
Comparison Value
(ppm)
benzo(a)anthracene 0.39 carcinogen
benzo(a)pyrene 0.32J 0.1C
benzo(b)fluoranthene 0.42 carcinogen
benzo(g,h,i)perylene 0.14J NA
chrysene 0.35J carcinogen
dibenzo(a,h)anthracene 0.066J carcinogen
indeno(1,2,3-c,d)pyrene 0.29J carcinogen
2-methylnaphthalene 0.031J NA
naphthalene 0.29J NA
phenanthrene 0.28J NA
carbazole 0.016J NA
dibenzofuran 0.017J NA
gamma-BHC 0.0007JP 0.6E, carcinogen
1,3-dichlorobenzene 0.076J NA
1,4-dichlorobenzene 0.1J carcinogen
4-methylphenol 0.3J carcinogen
arsenic 13.1 0.6E, 0.4C
barium 162 100R
beryllium 1.6 10R, 0.2C
cadmium 1.3J 1E, carcinogen
chromium 62.5 2,000R (III)
10R, 60C (VI)
cobalt 10.4J NA
copper 77.3 NA
lead 157 carcinogen
manganese 879 300R
nickel 38.7 40R, carcinogen
vanadium 27.9 NA
zinc 731 600R

Reference: 3

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

J – Estimated Concentration: below Contract Required Detection Level, but above Instrument Detection Limit
(III)– For chromium(III)
(VI)– For chromium(VI)
NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 6. On-site subsurface soil concentrations of contaminants of concern, from the RI (1990, 10/92) and the ESI (4/92).
Chemical Date Maximum Concentration
(ppm)
Depth
(feet)
Reference Comparison Value
(ppm)
benzene 1990 0.041 12 7 20C
10/92 0.0216 28 8
bromodichloromethane 10/92 0.0137 29 8 40E, 10C
bromomethane 10/92 0.0429 31 8 3R
chlorobenzene 1990 0.22 27 7 40R
10/92 1.18 28 8
chloroform 1990 0.014 7 7 20E, 100C
10/92 0.0119 31 8
chloromethane 10/92 0.534 30 8 NA
1,1-dichloroethane 10/92 0.184 31 8 carcinogen
1,2-dichloroethane 10/92 0.213 46 8 8C
1,2-dichloroethylene 10/92 0.306 46 8 20E, 1C
1,2-dichloroethylene (total) 1990 90 27 7 NA (cis)
40R (trans)
(trans) 10/92 0.714 30 8
trans-1,3-dichloropropylene 10/92 0.327 31 8 carcinogen
ethylbenzene 1990 210 32 7 200R
10/92 317 31 8
methylene chloride 1990 70 32 7 100E, 90C
10/92 34 31 8
styrene 10/92 0.787 33 8 carcinogen
1,1,2,2-tetrachloroethane 10/92 0.180 31 8 4C
tetrachloroethylene 10/92 0.553 33 8 10C
toluene 1990 280 32 7 400R
10/92 54.9 31 8
1,1,1-trichloroethane 10/92 0.284 29 8 NA
1,1,2-trichloroethane 10/92 0.169 29 8 60C
trichloroethylene 1990 610 27 7 60C
10/92 6.61 31 8
vinyl chloride 10/92 6.03 33 8 0.04E, carcinogen
xylenes (total) 10/92 458 33 8 400Ei
acenaphthylene 10/92 0.11 46 8 NA
benzo(a)anthracene 1990 7.9 13 7 carcinogen
4/92 7.J 1-1.5 3
10/92 13 29 8
benzo(a)pyrene 1990 9.5 13 7 0.1C
4/92 5.2J 1-1.5 3
10/92 13 29 8
benzo(b)fluoranthene 1990 9.3 13 7 carcinogen
4/92 7.2J 1-1.5 3
10/92 18 29 8
benzo(g,h,i)perylene 1990 2.7 17 7 NA
4/92 2.7J 1-1.5 3
10/92 6.9 29 8
benzo(k)fluoranthene 1990 7.2 13 7 carcinogen
10/92 7.2 29 8
chrysene 1990 7.9 13 7 carcinogen
4/92 6.3J 1-1.5 3
10/92 15 29 8
dibenzo(a,h)anthracene 10/92 3.4 29 8 carcinogen
indeno(1,2,3-c,d)pyrene 1990 6.3 13 7 carcinogen
4/92 4.7J 1-1.5 3
10/92 18 29 8
2-methylnaphthalene 4/92 0.051J 4-5 3 NA
naphthalene 1990 6.7 13 7 NA
4/92 1.7J 1-1.5 3
10/92 2.6 29 8
phenanthrene 1990 31 13 7 NA
4/92 14 1-1.5 3
10/92 72 29 8
benzidine (dibenzothiophene)(16) 1990 80 13 7 4E, 0.003C (NA)
carbazole 4/92 2.5J 1-1.5 3 NA
dibenzofuran 4/92 0.98J 1-1.5 3 NA
di-n-octylphthalate 10/92 0.46 33 8 NA
PCBs (total) 1990 24,000 32 7 0.04E, 0.09C
4/92 4.3 0.2-0.5 3
10/92 2,100 33 8
alpha-BHC 1990 0.0093 11 7 0.1C
gamma-BHC 1990 0.16 32 7 0.6E, carcinogen
4/92 0.01P 0.2-0.5 3
10/92 0.026 28 8
gamma-chlordane 1990 0.34 14 7 0.5C
10/92 0.0085 35 8
4,4'-DDD 1990 0.25 32 7 3C
10/92 0.028 29 8
dieldrin 1990 0.028 11 7 0.1E, 0.04C
10/92 0.0016 50 8
heptachlor epoxide 1990 0.0024 28 7 0.03R
1,3-dichlorobenzene 10/92 0.0368 31 8 NA
1,4-dichlorobenzene 1990 1.1 13 7 carcinogen
10/92 0.46 28 8
hexachlorobenzene 1990 6.5 27 7 2E, 0.4C
10/92 0.0031 46 8
hexachlorobutadiene 1990 0.016 32 7 0.4Ei
1,2,3,4-tetrachlorobenzene 1990 0.14 32 7 NA
1,2,3-trichlorobenzene 1990 0.18 32 7 NA
1,2,4-trichlorobenzene 1990 0.60 32 7 20R
10/92 0.0088 46 8
antimony 1990 3.3 7 7 0.8R
arsenic 1990 19 9 7 0.6E, 0.4C
4/92 9.9 4-5 3
barium 4/92 205 4-5 3 100R
beryllium 1990 5 17 7 10R, 0.2C
4/92 1.8 1-1.5 3
cadmium 1990 4 7 7 1E, carcinogen
4/92 1.3J 4-5 3
chromium 1990 62 11 7 2,000R (III)
10R, 60C (VI)
4/92 64.2 4-5 3
cobalt 1990 15 9 7 NA
4/92 8.2J 4-5 3
copper 1990 92 7 7 NA
4/92 84.5 4-5 3
lead 1990 220 7 7 carcinogen
4/92 311 4-5 3
manganese 4/92 667 4-5 3 300R
mercury 1990 0.23 8 7 NA
4/92 0.43 4-5 3
nickel 1990 34 9 7 40R, carcinogen
vanadium 4/92 24.1 4-5 3 NA
zinc 1990 860 7 7 600R
4/92 441 4-5 3

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.
J – Estimated Concentration: below Contract Required Detection Level, but above Instrument Detection Limit
(III) – For chromium(III)
(VI) – For chromium(VI)
NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei – ATSDR EMEGs, intermediate-duration exposure
R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 7. Concentrations of contaminants of concern in the air at the Bay City Middlegrounds Landfill, from the RI, August 8-18, 1989.
Chemical Maximum Concentration
(µg/m3)
ComparisonValues
(µg/m3)
Background During Drilling and Sampling
8/8/89 8/11/89 8/17/89 8/18/89
ethylbenzene ND (5) ND (5) 10 ND (5) 200R
methylene chloride 8 ND (5) 23 24 2C
toluene 10 8 32 17 400R
trichloroethylene ND (5) ND (5) ND (5) 5 0.06C
xylenes (total) ND (5) ND (5) 12 ND (5) NA

Reference: 1

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

ND – Not Detected, with detection limit.

NA – None Available

Comparison Value Bases

R – U.S. EPA Reference Concentration
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 8. Concentrations of contaminants of concern in air samples collected near the BCM site by the MDNR Air Quality Division, November 11, 1992.
Chemical Concentration
(µg/m3)
Comparison Values
(µg/m3)
upwind downwind
10:00-13:00 13:00-15:00 10:00-13:00 13:00-15:00
benzene 0.8 0.9 0.5 1.4 0.1C
1,3-butadiene ND ND 0.1 0.1 0.004C
carbon tetrachloride 0.6 0.6 0.3 0.5 0.07C
chlorobenzene 0.1 0.1 0.1 0.05 NA
chloroethane ND ND ND 0.2 10,000R
chloroform 0.1 ND 0.1 0.2 0.04C
chloromethane 1 1 1.0 1.4 800E
1,3-dichlorobenzene 0.06 ND 0.06 ND NA
1,4-dichlorobenzene 1.3 1 0.7 3 1,200Ei,carcinogen
1,1-dichloroethane 0.4 ND ND ND carcinogen
1,3-dichloropropylene (cis) 2.1 1 2 0.3 9E, carcinogen
ethylbenzene 0.1 0.1 0.1 0.4 NA
methylene chloride 17.2 19.1 19.9 157.6 2C
tetrachloroethylene 0.4 0.2 0.4 0.5 2C
toluene 1.1 1.2 1.0 5 400R
1,1,1-trichloroethane 1.1 1.5 0.8 4 4,000Ei
trichloroethylene 0.1 ND 0.1 0.1 0.6C
1,3,5-trimethylbenzene 0.1 0.05 ND 0.2 NA
xylenes (total) 1.1 1.6 1.1 3.1 NA

Reference: 18
Only chemicals that were detected are listed
Bolded chemicals exceed comparison values.
ND – Not Detected, with detection limit.
NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei – ATSDR EMEGs, intermediate-duration exposure
R – U.S. EPA Reference Concentration
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 9. Concentrations of volatile contaminants of concern in samples of soil gas from the BCM site, collected during Phase III of the RI during September and October 1992.
Chemical Maximum Concentration
(µg/m3)
Comparison Value
(µg/m3)
benzene 0.87 0.1C
bromodichloromethane 0.41 carcinogen
chlorobenzene 0.78 NA
chloroform 2.4 0.04C
chloromethane 0.08 800E
1,3-dichlorobenzene 0.2 NA
1,4-dichlorobenzene 0.19 1,200Ei, carcinogen
1,1-dichloroethane 0.05 carcinogen
1,2-dichloroethane 0.1 0.04C
1,1-dichloroethylene 0.11 0.02C
cis-1,3-dichloropropylene 0.06 9E, carcinogen
toluene 17 400R
1,1,1-trichloroethane 1 4,000Ei
1,1,2-trichloroethane 7.4 0.06C
vinyl chloride 0.05 carcinogen
xylenes 3.7 NA

Reference: 8

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei – ATSDR EMEGs, intermediate-duration exposure
R – U.S. EPA Reference Concentration
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 10. Concentrations of contaminants of concern found in a residential well north of the Bay City Middlegrounds Landfill, October 1988.
Chemical Concentration
(ppb)
Comparison Value
(ppb)
cadmium 1.3 7E, carcinogen
manganese 850 50R

Reference: 19

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion

Table 11. Off-site shallow sub-surface soil concentrations of contaminants of concern, from the ESI, 1992.
Chemical Maximum Concentration
(ppm)
Comparison Value
(ppm)
North South
benzene 0.002J ND 20C
chlorobenzene 0.002J ND 40R
chloroform 0.002J ND 20E, 100C
1,2-dichloroethylene (total) 0.002J ND NA (cis);   40R (trans)
ethylbenzene 0.002J ND 200R
toluene 0.003J ND 400R
1,1,1-trichloroethane 0.002J ND NA
trichloroethylene 0.002J ND 60C
xylenes (total) 0.005J ND 400Ei
benzo(a)anthracene 0.048J 3.5J carcinogen
benzo(a)pyrene 0.039J 3.4J 0.1C
benzo(b)fluoranthene 0.08J 4.9J carcinogen
benzo(g,h,i)perylene ND 0.8 NA
benzo(k)fluoranthene 0.02J 1.7J carcinogen
chrysene 0.057J 3.1 carcinogen
indeno(1,2,3-c,d)pyrene ND 1.1J carcinogen
2-methylnaphthalene ND 0.04J NA
naphthalene 0.009J 0.043J NA
phenanthrene 0.068J 2.4 NA
gamma-chlordane ND 0.033J 0.5C
4,4'-DDD 0.0013J ND 3C
PCBs (total) 0.087J ND 0.04E, 0.09C
carbazole ND 0.23J NA
dibenzofuran ND 0.089J NA
arsenic 6.2 3.1 0.6E, 0.4C
barium 192 56 100R
beryllium 0.86J 1.2 10R, 0.2C
chromium 18.4 10.4 2,000R (III)
10R, 60C (VI)
cobalt 4.7J 4.7J NA
copper 19.4 20.4 NA
lead 98.4 171 carcinogen
manganese 340 210 300R
mercury ND (0.12) 0.15 NA
nickel 19 13 40R, carcinogen
vanadium 12.9 14.2 NA
zinc 67.9 73.6 600R

Reference: 3

Only chemicals that were detected are listed

Bolded chemicals exceed comparison values.

ND – Not Detected (with detection limit)

J – Estimated Concentration: below Contract Required Detection Level, but above Instrument Detection Limit

(III)– For chromium(III)
(VI)– For chromium(VI)

NA – None Available
carcinogen – Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases

E – ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei – ATSDR EMEGs, intermediate-duration exposure
R – ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
C – ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)


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