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1. ATSDR > Public Health Assessments & Consultations

LIST OF FIGURES

Figure 1. Location Map

Figure 2. Site Vicinity Map

APPENDIX B – CONTAMINANT AND PATHWAY TABLES

LIST OF TABLES

Table 1. On-Site Contamination – Pre-Removal Characteristics of Media
Table 2. Off-Site Contamination
Table 3. Summary – Completed Exposure Pathways and Associated Health-Related Information
Table 4. Summary – Potential Exposure Pathways

List of Acronyms, Symbols, and Abbreviations

ppm ppb < RMEG AL MCL

parts per million parts per billion less than Reference Dose Media Evaluation Guide Action Level Maximum Contaminant Level

Table 1.    On-Site Contamination – Pre-Removal Characteristics of Media

Material/Media		Contaminant	Maximum Concentration	Sample Year & Reference	Comparison Value
					Value	Source
Wastewater Treatment Building – Miscellaneous Solids/Sludge		Chromium VI	23,900 ppm	1993 (13)	4,000e ppm	RMEG
		Total Chromium	154,000 ppm	1990 (2)	4,000e ppm 700,000f ppm
		Lead	38,500 ppm	1990 (2)	none
Wastewater Treatment Building – Liquids		Total Chromium	411,000 ppb	1993 (13)	200g ppb 40,000h ppb	RMEG
Plating Building – Concrete in Floors		Chromium VI	Trough floor – 21,100 ppm	1993 (13) 1994 (7)	4,000e ppm 700,000f ppm	RMEG
		Total Chromium	Trough floor – 21,000 ppm Building floor – 16\,000 ppm
		Lead	Trough floor – 6,020 ppm Building floor – 770 ppm
Plating Building – Dust on Floor		Total Chromium	62,100 ppm	1993 (13)	4,000e ppm 700,000f ppm	RMEG
		Lead	24,300 ppm		none
Wastewater		Total Chromium	21,000 ppb	1971 (14)	50c ppb 10,000d ppb	RMEG
Surface Soil/Sludge, in former lagoon		Total Chromium	5,945 ppm	1989 (2)	10 & 300a ppm 2,000 & 50,000b ppm	RMEG
			19,100 ppm	1993 (13)
		Lead	6,847 ppm	1989 (2)	none
			29,100 ppm	1993, (13)
Surface Soils near lagoon and buildings		Total Chromium	79,200 *ppm 1,990 **ppm.	1993 (13) 1993 (15)	10 & 300a ppm 2,000 & 50,000bppm	RMEG
		Lead	81,800 *ppm 272 **ppm	1993 (13) 1993 (15)	none
Subsurface Soil	Near , or down gradient, of lagoon	Total Chromium	3,056 ppm	1980, 1990 (2)	10 & 300a ppm 2,000 & 50,000bppm	RMEG
		Lead	2,035 ppm		none
	Not near or down gradient of lagoon	Total Chromium	77 ppm		10 & 300a ppm 2,000 & 50,000bppm	RMEG
		Lead	ND		none
Groundwater, Recovery Well		Chromium VI	985 ppb	1980-1988 (3)	50c	RMEG
		Lead	<5 ppb	1991 (2)	15 ppb	AL
Comparison value notes:
a For Chromium VI; 10 ppm for pica child; 300 ppm for child b For Chromium III; 2,000 ppm for pica child; 50,000 ppm for child c For Chromium VI; 50 ppb for child d For Chromium III; 10,000 ppb for child * sample taken between chemical storage building and wastewater treatment building				e For Chromium VI; 4,000 ppm for workers f For Chromium III; 700,000 ppm for workers g For Chromium VI; 200 ppb for workers h For Chromium III; 40,000 ppb for workers **samples taken elsewhere

Table 2.    Off-Site Contamination

Material/Media		Contaminant	Maximum Concentration	Sample Year & Reference	Comparison Value
					Value	Source
Soil/Sediment, in Tributary	Upstream	Total Chromium	5.1 ppm	1989 (2)	10 & 300a ppm 2,000 & 50,000bppm	RMEG
		Lead	61 ppm		none
	Downstream	Total Chromium	14.4 ppm		10 & 300a ppm 2,000 & 50,000bppm	RMEG
		Lead	51 ppm		none
Groundwater, Monitoring Well to East (Down Gradient) of ACE		Total Chromium	1,910 ppb	1990-91 (2)	50c ppb 10,000d ppb	RMEG
			345 ppb	1995 (17)
		Lead	3 ppb	1990-91 (2)	15 ppb	AL
Groundwater, Monitoring Wells at County Landfill		Total Chromium	20 ppb	1995 (18)	50c ppb 10,000d ppb	RMEG
		Lead	5 ppb		15 ppb	AL
Groundwater, PWS #8, Former Public Well		Chromium VI	Zero	1973 (3)	50c ppb	RMEG
		Total Chromium	1,800 ppb 1,100 ppb 980 ppb 64 ppb	1980 (3) 1981 1982 1995 (17)	50c ppb 10,000d ppb	RMEG
Groundwater Other Public Wells		Chromium VI	13 ppb	1985-1988 (3)	50c ppb	RMEG
		Total Chromium	40 ppb 10 ppb	1984 (3) 1994 (19)	50c ppb 10,000d ppb	RMEG
		Lead	6 ppb <1 ppb	1990 (2) 1995 (19)	15 ppb	AL
		Nitrate (as N)	4,400 ppb	1990 (2)	10,000 ppb	MCL
			4,980 ppb	1995 (19)
Private Wells		Chromium VI	For Worst of 2-Wells: Over several months, maximum was 14 ppb. Then, abruptly increased to 4,100 ppb and decreased to 610 ppb in two months; & five months later was not detected. For Second Well: Level increased over 16 months to 12 ppb, then was not detected.	1987 (3)	503 ppb	RMEG
		Total Chromium	Three Wells: Sampled once; maximum value for one well was 17 ppb. For others, nondetect	1990 (2)	50c ppb 10,000d ppb	RMEG
			Eight wells: Maximum value for three wells was 24 ppb. For others, nondetect	1995, 1996 (17)
		Lead	6 ppb Eight wells: nondetect	1990 (2) 1995, 1996 (17)	15 ppb	AL
		Nitrate (as N)	Two wells: 28,190 ppb e 167 wells: 21,000 ppb	1989 (3) 1991-1996 (20)	10,000 ppb	MCL
Comparison value notes:
a For Chromium VI; 10 ppm for pica child; 300 ppm for child b For Chromium III; 2,000 ppm for pica child; 50,000 ppm for child				c For Chromium VI; 50 ppb for child d For Chromium III; 10,000 ppb for child
e Two well owners now connected to public water.

Table 3. Summary – Completed Pathways

PATHWAY NAME:	Former Process Workers	Public Water Users	Private Well Users	Private Well Users
Source:	Process materials, wastes	Process materials, wastes	ACE process materials, wastes, plus possibly undefined sources	Not site related
Medium:	Process materials, wastes, building components, soils, public water supply	Groundwater	Groundwater	Groundwater
Exposure Point:	On-site process buildings and surrounding areas	Off-site Residences/businesses	Off-site Residences, businesses	Some well locations in county
Exposure Route:	Incidental ingestion Inhalation Skin contact	Ingestion	Ingestion	Ingestion
Receptor Population:	Process area workers	Public Water Users	Residents, transients	Residents
Exposure Period:	Past	Principally in Past, also Current and Future	Past, present, future	Past, present, future
Estimated Number Exposed*:	100	6,000	100	1,000
Principal Contaminants	Chromium, some lead	Chromium	Chromium	Nitrates Not site related
* Estimated number of exposed persons is believed to be within an order of magnitude

Table 4. Summary – Potential Pathways

PATHWAY NAME:	Process Building Reuse	Ace Employees at Home
Source:	Residual process materials, wastes	Process materials, wastes, soils
Medium:	Dust, building components	Worker clothing
Exposure Point:	On-site, In building	Off-site, Residences
Exposure Route:	Ingestion Inhalation	Ingestion Inhalation
Receptor Population:	Users	Employee, family
Exposure Period:	Future	Past
Estimated Number Exposed:	50	400
Principal Plausible Contaminants	Chromium, lead	Chromium, lead
* Estimated number of exposed persons is believed to be within an order of magnitude

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