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PETITIONED PUBLIC HEALTH ASSESSMENT

COUNTRY CLUB LAKE ESTATES
HATTIESBURG, FORREST COUNTY, MISSISSIPPI


APPENDICES

APPENDIX A


Figure 1


Figure 2


Figure 3



APPENDIX B

Toxicity Equivalency Factors for Polychlorinated
Dioxins and Furans


Abbreviation Name Toxicity
Equivalency
Factor
TCDFs Tetrachlorodibenzo-furans 0
2,3,7,8-TCDF Tetrachlorodibenzo-furan 0.1
PECDFs Pentachlorodibenzo-furans 0
1,2,3,7,8-PECDF Pentachlorodibenzo-furan 0.05
2,3,4,7,8-PECDF Pentachlorodibenzo-furan 0.5
HxCDFs Hexachlorodibenzo-furans 0
2,3,7,8-HxCDF Hexachlorodibenzo-furan 0.1
HpCDFs Heptachlorodibenzo-furans 0
2,3,7,8-HpCDF Heptachlorodibenzo-furan 0.01
OCDF Octachlorodibenzo-furan 0.001
TCDDs Tetrachlorodibenzo-p-dioxins 0
2,3,7,8-TCDD Tetrachlorodibenzo-p-dioxin 1
PeCDDs Pentachlorodibenzo-p-dioxins 0
2,3,7,8-PeCDD Pentachlorodibenzo-p-dioxin 0.5
HxCDDs Hexachlorodibenzo-p-dioxins 0
2,3,7,8-HxCDD Hexachlorodibenzo-p-dioxin 0.1
HpCDDs Heptachlorodibenzo-p-dioxins 0
2,3,7,8-HpCDD Heptachlorodibenzo-p-dioxin 0.01
OCDD Octachlorodibenzo-p-dioxin 0.001

Due to a wide range of isomers for dioxins and furans, a Toxicity Equivalency Factor (TEF) has been applied to the results in Table 1 , those figures are then summed, producing a total 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) toxicity equivalent. The TEF is used to analyze isomers of dioxins and related compounds, multiplying the concentration of each dioxin or furan by a weighted value so that the toxicity of the isomer can be considered equal to that of an equivalent concentration of the most toxic isomer. The TEF has been calculated for isomers and congeners that are less toxic than 2,3,7,8-TCDD, the most toxic and most widely studied of the chlorinated dioxins. This procedure has been applied to data in Table 1 in order to calculate the 2,3,7,8-TCDD toxicity equivalent of groundwater in monitoring wells 2, 3, and 4.

Table 1. Summary of Polychlorinated Dioxins and Furans Found in On-site Groundwater Monitoring Wells 09/18/901

Contaminants
Concentrations in µg/L
MW-2
MW-3
MW-4
TCDFs (Total) ND ND 0.000036
PeCDFs (total) 0.00004 ND ND
HxCDFs (Total) 0.0019 0.000043 0.000058
1,2,3,4,7,8-HxCDF 0.000082 ND ND
1,2,3,6,7,8-HxCDF 0.000032 ND ND
1,2,3,7,8,9-HxCDF 0.00008 ND ND
2,3,4,7,8,9-HxCDF 0.000075 ND ND
HpCDFs (Total) 0.0078 0.0016 0.00033
1,2,3,4,6,7,8-HpCDF 0.0013 0.00031 0.000085
1,2,3,4,7,8,9-HpCDF 0.0002 0.000049 ND
OCDF 0.0084 0.0019 0.00039
PeCDDs (Total) 0.000078 ND ND
HxCDDs (Total) 0.0011 0.000086 ND
1,2,3,4,7,8-HxCDD 0.00012 ND ND
1,2,3,6,7,8-HxCDD 0.00024 ND ND
1,2,3,7,8,9-HxCDD 0.00018 ND ND
HpCDDs (Total) 0.016 0.0033 0.0011
1,2,3,4,6,7,8-HpCDD 0.011 0.002 0.00066
OCDD 0.081 0.016 0.0069
Total 2,3,7,8-TCDD
Toxicity Equivalent
0.0002953 0.00004149 0.00001474
*Comparison Values 0.00001 0.00001 0.00001
Note: Shading designates the high and low concentrations.
ND = Not Detected
* = Environmental Media Evaluation Guidelines for 2,3,7,8-TCDD
1 = Reference Used: 25

Table 2. Octachlorodibenzo-p-dioxin in Off-site Sediment Samples 10/17/86-10/18/861

Sampling Location OCDD
Concentration
µg/kg
2,3,7,8-TCDD*
Toxicity
Equivalent
µg/kg
Comparison
Value **
µg/kg
Fork of Mineral Creek Below Site - 1" 60 0.06 0.05
Fork of Mineral Creek Below Site - 2-4" 50 0.05 0.05
Fork of Mineral Creek Below Site - Leaf Litter 1000 1.0 0.05
Country Club Lake, Mid-Lake - 1" 80 0.08 0.05
Country Club Lake, Dam - 1" 250 0.25 0.05
Country Club Lake, Dam - 2-4" 70 0.07 0.05
Private Lake, Dam - 1" 20 0.02 0.05
Private Lake, Dam - Leaf Litter 100 0.10 0.05
Private Lake, Dock - 1" 50 0.05 0.05
Private Lake, Dock - 2-4" 70 0.07 0.05
***Lake Serene, Dam Near Road - 1" <0.1 <0.0001 0.05
1 Reference Used: 33
* 2,3,7,8-Tetrachlorodibenzo-p-dioxin toxicity equivalent
** Environmental Media Evaluation Guides, values reflect a child's dose
*** Control sample taken from control watershed

Table 3. Concentrations of Pentachlorophenol Detected in the Tissue of Fish From the Lakes on Mineral Creek1

Date Species Sample Penchlorophenol
µg/kg
Comparison
Value2
µg/kg
12/03/87 Largemouth Bass Fillet 4.7 26
12/03/87 Hybrid Sunfish Fillet 11.6 26
12/03/87 Hybrid Sunfish Whole 19.4 26
01/26/87* Hybrid Sunfish Whole 7,036 26
01/26/87* Green Sunfish Whole 2,840 26
01/15/82* Unknown Unknown 301 26
01/24/79* Warmouth Livers 4.4 26
01/24/79* Chubsuckers Whole 17 26
01/24/79* Chubsuckers Whole 17 26
12/28/76* Unknown Unknown 5,200 26
1 References Used: 36, 38, 39, 41
2 EPA comparison value
* Denotes samples that were taken on or within a few days following a documented fish kill

Table 4. Concentrations of Total 2,3,7,8-Tetrachlorodibenzo-p-dioxin Detected in the Tissue of Fish From Mineral Creek and Country Club Lake1

DATE SPECIES SAMPLE TOTAL 2,3,7,8-TCDD TEQ
µg/kg
COMPARISON
VALUE2
µg/kg
12/87 Hybrid Sunfish Whole Composite 0.15669 0.000021
12/87 Largemouth Bass Fillet Composite 0.10328 0.000021
04/18/90* Spotted Sunfish Composite 0.007534 0.000021
04/18/90* Spotted Sunfish Unknown 0.003486 0.000021
06/12/91 Bluegill Fillet 0.004693 0.000021
06/12/91 Brown Bullhead Fillet 0.004907 0.000021
06/12/91 Largemouth Bass Fillet 0.004427 0.000021
1 References used: 44,46,47
2 EPA comparison value
* Quality Assurance/Quality Control problems

Table 5. Completed Exposure Pathways

Pathway Name
EXPOSURE PATHWAY ELEMENTS
Time
Source Environmental
Media
Point of
Exposure
Route of
Exposure
Exposed
Population
FOOD CHAIN DAVIS TIMBER COMPANY FISH RESIDENCE INGESTION MINERAL CREEK AND ITS LAKES' FISHEATERS PAST
PRESENT
FUTURE
MINERAL CREEK AND LAKE SEDIMENT DAVIS TIMBER COMPANY SEDIMENT MINERAL CREEK AND ITS LAKES SKIN CONTACT, INGESTION USERS OF MINERAL CREEK AND ITS LAKES PAST
PRESENT
FUTURE
SURFACE WATER DAVIS TIMBER COMPANY SURFACE WATER MINERAL CREEK AND ITS LAKES SKIN CONTACT, INGESTION USERS OF MINERAL CREEK AND ITS LAKES PAST
PROCESS AREA SOIL DAVIS TIMBER COMPANY SURFACE SOIL DAVIS TIMBER COMPANY SITE SKIN CONTACT, INGESTION, INHALATION ON-SITE WORKERS PAST
PRESENT
FUTURE


Table 6. Potential Exposure Pathways

Pathway Name
EXPOSURE PATHWAY ELEMENTS
Time
Source Environmental
Media
Point of
Exposure
Route of
Exposure
Exposed
Population
GROUNDWATER DAVIS TIMBER COMPANY GROUNDWATER RESIDENCE SKIN CONTACT, INGESTION USERS OF GROUNDWATER SOURCES NEAR THE DAVIS TIMBER COMPANY SITE PAST
PRESENT
FUTURE
GOLF COURSE SOIL DAVIS TIMBER COMPANY SURFACE SOIL HATTIESBURG COUNTY CLUB GOLF COURSE SKIN CONTACT, INGESTION GOLF COURSE EMPLOYEES AND USERS PAST
PRESENT
FUTURE
POND SEDIMENT DAVIS TIMBER COMPANY SEDIMENT HATTIESBURG COUNTY CLUB GOLF COURSE IRRIGATION POND SKIN CONTACT, INGESTION NEIGHBORHOOD CHILDREN PAST
PRESENT
FUTURE

Appendix C

Reported Fish Kills Documented by
Mississippi Department of Natural Resources

        Date       Location
December 16, 1974 Country Club Lake
December 28, 1976 Country Club Lake
February 2, 1978 Country Club Lake
January 24, 1979 Country Club Lake
January 28, 1979 Downstream Private Lake
January 14, 1982 Downstream Private Lake
February 15, 1983 Country Club Lake
January 24, 1987 Country Club Lake


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