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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