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1. ATSDR > Public Health Assessments & Consultations

PUBLIC HEALTH ASSESSMENT

CENEX SUPPLY AND MARKETING, INCORPORATED
(a/k/a WESTERN FARMERS, INCORPORATED)
QUINCY, GRANT COUNTY, WASHINGTON

APPENDIX A: DATA TABLES

Table A1: 1993 EPA & 1995 Cenex site soil volatile organic compound (VOC) concentrations (in mg/kg)

	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sample
Chemical	RPS1 EPA	RPS2 EPA	RPS3 EPA	RPS4 EPA	RPS5 EPA	SS1* EPA	SS2 EPA	SS3 EPA	SS4 EPA	SS5 EPA	1995 Cenex	CV (child)	CV (adult)
Acetone			0.059				0.04	0.042		0.07		5,000 RMEG	70,000 RMEG
Benzene		0.001						0.0003				20 - CREG	20 - CREG
Chloroform			0.002									100 - CREG 500 - EMEG	100 - CREG 7,000 - EMEG
1,2-Dichloropropane	0.006	0.003	1	0.2	0.052		0.005		0.0004		1.5	5,000 - EMEG	60,000 - EMEG
1,2,4-Trimethylbenzene (pseudocumene)	0.015		0.022	0.01								3,900 - EPA	3,900 - EPA
1,3,5-TMB (mesitylene)	0.006		0.036	0.009								3,900 - EPA	3,900 - EPA
Chlorobenzene	0.092	0.008	0.22	0.034	0.026				0.019			1,000 - RMEG	10,000 - RMEG
1,3-Dichloropropane	0.002		0.076	0.019	0.009							N/A	N/A
Total Xylenes	0.068	0.002	0.152	0.045	0.003							10,000 - EMEG	100,000 - EMEG
cis-1,3-Dichloropropene	0.005										0.009	20 - RMEG	200 - RMEG
trans-1,3-Dichloropropene	0.006										0.009	20 - RMEG	200 - RMEG
Chloromethane		0.002	0.002		0.002							76.9 - MTCA B	76.9 - MTCA B
Naphthalene		0.039	0.079	0.009								1,000 - EMEG	10,000 - EMEG
2-Butanone (MEK)			0.026				0.007	0.012				30,000 - RMEG	400,000 - RMEG
Ethylbenzene			0.009	0.002								5,000 - RMEG	70,000 - RMEG
2-Chlorotoluene	0.039	0.009	0.16	0.069	0.011							1,000 - RMEG	10,000 - RMEG
Tetrachloroethene (PERC)			0.003									10 - CREG 500 - RMEG	7,000 RMEG
1,1,1-TCA	0.008			0.001								1,600 - EPA	1,600 - EPA
Chloroethane (ethyl chloride)				0.001								220 - EPA	220 - EPA
1,1,2-TCA					0.001							10 CREG 200 - RMEG	10 - CREG 3,000 - RMEG
Carbon disulfide							0.008			0.028		5,000 - RMEG	70,000 - RMEG
1,2,3-Trichloropropane							0.002					300 - RMEG	4,000 - RMEG
1,1-Dichloroethene									0.0002			1 - CREG 500 - EMEG	1 - CREG 6,000 - EMEG

* Background soil sample
CV = health comparison value
No soil VOCs exceeded health comparison values
EPA comparison values are from EPA Region III risk-based concentration (RBC) Table

Table A2: 1993 EPA & 1995 Cenex site herbicide/pesticide concentrations in soil/sludge (in mg/kg)

	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sample	Comparison value (child)	Comparison value (adult)
Chemical	RPS1* EPA	RPS2 EPA	RPS3 EPA	RPS4 EPA	RPS5 EPA	SS1** EPA	SS2+ EPA	SS3 EPA	SS4 EPA	SS5 EPA	1995 Cenex
Disulfoton (insecticide)	8.79	146	4.67	3.37							4.93	3 - EMEG	40 - EMEG
Diuron	0.295		0.764	0.753			0.93		3.79			100 - RMEG	1,000 - RMEG
Cycloate	0.79											N/A	N/A
Trifluralin (Treflan) (herbicide)	158	57.7	295	349	0.98		294				138	400 - RMEG 90 - CREG	5,000 - RMEG 90 - CREG
Atrazine	5.25	0.694	21.3	38.6			0.735				8.51	4.55 - MTCA B	4.55 - MTCA B
Vernolate (vernam) (herbicide)	42.2	2.89	112	78.3	0.347		6.87				89.7	50 - RMEG	700 - RMEG
Triallate (Fargo)	2.67	1.57	7	8.65			3.21					1,040 - MTCA B	1,040 - MTCA B
Chlorpyrifos (insecticide)	19.6	1.31	19.2	4.75			162					50 - EMEG	700 - EMEG
Tolban (profluralin)	3.51	19.7	192	92			3.92					480 - MTCA B	4,200 - MTCA B
Pendimethalin (Prowl)	14	8.68	20.5	24.8			9.12					2,000 - RMEG	30,000 - RMEG
Hexazinone (Velpar)	1.16	1	1.77	2.14	5.33				0.674			2,640 - MTCA B	2,640 - MTCA B
Ethalfluralin (Sonalan) (herbicide)	373	120	1,530	917			557				478	N/A	N/A
Eptam (EPTC)	45.7	3.47	406	98.4	0.565		2.36					1,000 - RMEG	20,000 - RMEG
Alachlor (Lasso)							19.8	0.529			3.4	12.3 - MTCA B	12.3 - MTCA B
Metolachlor							33.9					8,000 - RMEG	100,000 - RMEG
Bromacil								0.551				N/A	N/A
Terbacil									1.86			1,040 - MTCA B	1,040 - MTCA B

* RPS = subsurface soil/sludge samples
**background sample
+ SS2-SS5 = surface soil samples
Shaded cells = contaminant exceeds health comparison value and was further evaluated in the health assessment

Table A3: Maximum Cenex site soil metal concentrations (in mg/kg)

Chemical	1995 - Cenex	1993 - EPA (Sample # RPS4)	Noncancer CV (Child)	Noncancer CV (Adult)	Cancer CV	90th percentile Background (Yakima Basin)
Beryllium	0.979	1.39	100 - RMEG	1,000 - RMEG	0.233 (MTCA B)	1.57
*Chromium	181	360	200 - RMEG	2,000 - RMEG	NA	38.27
Cadmium	8	25.2	10 - EMEG	100 - EMEG	NA	0.93
Zinc		6,620	20,000 - EMEG	200,000 - EMEG	NA	78.71
Thallium		6.7	5.6 - MTCA B	5.6 - MTCA B	NA	NA
Manganese		397	7,000 - RMEG	100,000 - EMEG	NA	1,105

* assumes hexavalent chromium
Shaded cells = contaminant exceeds health comparison value and was further evaluated in the health assessment

Table A4: 1993 EPA Cenex site soil phenoxyherbicide concentrations³⁴ (in mg/kg)

	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Sam #	Child CV	Adult CV
Chemical	RPS1 EPA	RPS2 EPA	RPS3 EPA	RPS4 EPA	RPS5 EPA	SS1* EPA	SS2 EPA	SS3 EPA	SS4 EPA	SS5 EPA
Dinoseb					0.066			0.035			50 - RMEG	700 - RMEG
MCPP + (Mecoprop)					27						N/A	N/A
MCPA ++											30 - RMEG	400 - RMEG
2,4-D	3.7	8.5	27.5	20.3	14.1	0.065	1		0.45		500 - RMEG	7,000 - RMEG
2,4-DB	0.48	0.5	4.6	0.48	1.52		0.87	0.49	0.69		400 - RMEG	6,000 - RMEG
Chloramben					0.068	0.42					N/A	N/A
Dacthal (DCPA)	0.35	0.3	0.17	0.17	0.39	4.6	0.058	0.015	0.022		500 - RMEG	7,000 - RMEG
Dicamba (Banvel)	0.33	1	3.3	2.68	0.6		0.095				2,000 - RMEG	20,000 - RMEG

+ 2-(4Chloro-2-methylphenoxy) propanoic acid
++ (4-Chloro-2-methylphenoxy) acetic acid
* background sample
No phenoxyherbicides exceeded health comparison values in soil

Table A5: Maximum VOC, nitrate, and ammonia concentrations in the Cenex groundwater plume ³⁵ (in µg/l)

Chemical	Maximum Concentration	Health Comparison Value	Maximum Contaminant Level (MCL)
Bromodichloromethane	2.4	0.6 - CREG	N/A
Carbon Tetrachloride	5.6	0.3 - CREG	5
Chlorobenzene	91	4,000 - Child EMEG	100
Chloroform	73	6 - CREG	100
Chloromethane	5.8	3 - LTHA	N/A
1,2-Dibromoethane (EDB)	23	0.0004 - CREG	0.05
1,1-Dichloroethane	19	800 - MTCA B	N/A
1,2-Dichloroethane	136	0.4 - CREG	5
1,1-Dichloroethene	18	0.06 - CREG	7
1,2-Dichloropropane	35,410	900 - EMEG	5
1,3-Dichloropropane	1,650	N/A	N/A
1,1-Dichloropropene	3.1	N/A	N/A
1,3-Dichloropropene	1.6
Methylene Chloride	1.7	5 - CREG	5
1,1,2-Trichloroethane	154	0.6 - CREG	5
1,2,3-Trichloropropane	1,700	40 - LTHA	N/A
Vinyl Chloride	7.2	0.2 - EMEG	2
Nitrate (mg/l)	279	20 - RMEG	10
Ammonia (mg/l)	471	210 - EPA	210 - EPA

Shaded cells = contaminant exceeded a health comparison value or drinking water standard
MCL =Safe Drinking Water Act maximum contaminant level
CREG = ATSDR cancer risk evaluation guide
EMEG = ATSDR environmental media evaluation guide
LTHA = long-term health advisory
RMEG = ATSDR reference dose media evaluation guide
MTCA B = Washington State Department of Ecology Model Toxics Control Act method B clean-up level

Table A6: Cenex site soil VOC & metal concentrations (in mg/kg), June 1997

	Sample #	Sample #	Sample #	Sample #	Sample #	Sample #	Health Comparison Value
Chemical	BH1	BH2	BH3	BH4	BH5	BH6
Chlorobenzene	4.8						1,000 - child RMEG 10,000 - adult RMEG
1,2-Dichloropropane	15, 2.1	1.2, 1.7			1.5, 3.7	0.66, 0.81, 1.1	5,000 - child EMEG 60,000 - adult EMEG
1,3-Dichloropropane	6.8, 1.1	0.28, 0.26			0.77		N/A
cis 1,3-Dichloropropene							20 - child RMEG 200 - adult RMEG
trans 1,3-Dichloropropene							20 - child RMEG 200 - adult RMEG
1,1,2-Trichloroethane					0.21		200 - child RMEG 10 - CREG
1,2,3-Trichloropropane					0.69	0.2, 0.45	300 - child RMEG 4,000 - adult RMEG
+Beryllium	0.3, 0.2	0.4, 0.1	0.1, 0.3	0.4, 0.2	0.2, 0.2	0.2, 0.2	100 - child RMEG 0.233 - MTCA B
Cadmium	0.25, 0.47	0.65	0.59, 0.24	0.49, 0.32			10 - child EMEG 100 - adult EMEG
* Chromium	10.1, 14.2	10.9, 9.3	9.2, 17.9	12.8, 14.6	9.1, 12.9	8.7, 11.7	*200 - child RMEG

* For hexavalent chromium
+ All beryllium samples were below the natural background concentration ³

Table A7: Cenex site soil pesticide/herbicide, ammonia, and nitrate concentrations (in mg/kg)
June 1997 (after soil remediation)

Chemical	Sample #	Sample #	Sample #	Sample #	Sample #	Sample #	Sample #	Sample #
	BH1	BH2	BH3	BH4	BH5	BH6	*BGS	**BGN	Health Comparison Value
Alachlor (Lasso)	0.031, 0.026				0.023		0.014		500 - child RMEG 7,000 - adult RMEG
Ethalfluralin					0.363	0.005			N/A
Trifluralin	0.003		0.01		0.298	0.001	0.001		90 - CREG 400 - child RMEG 5,000 - adult RMEG
Atrazine									2,000 - child RMEG 20,000 - adult RMEG
Disulfoton									3 - child EMEG 40 - adult EMEG
Vernolate					0.295				50 - child RMEG 700 - adult RMEG
Nitrate-N	40, 12	28.5, 6.4	35.5, 42.5	780, 200	24, 140	934, 242	16	8.5	80,000 - child RMEG 100,000 - adult RMEG
Ammonia-N	80, 21	480, 16	140, 1,100	320, 6.3	1,500, 1,500	3,500, 10	6.2	7.6	20,000 - child EMEG 200,000 - adult EMEG

* Sample was collected from the south border of the Quincy Junior High School athletic field
** Background soil sample was collected from the Habitat for Humanity property, immediately northwest of the Cenex site

Table A8: Cenex site soil gas VOC concentrations (in mg/m³)

Location	Date	chlorobenzene	chloroform	1,1-DCE	1,2-DCP	vinyl chloride	PID
VP1	7/1/97	N/D	N/D	N/D	N/D	N/D	N/D
VP2	7/1/97	N/D	N/D	N/D	16	N/D	3
VP3	7/1/97	N/D	2.8	N/D	165	N/D	10
VP4	7/1/97	N/D	3.4 ( 0.7 ppm)	N/D	791( 171 ppm)	N/D	30
VP5	7/1/97	4.3 ( 1 ppm)	3.1	3 ( 0.76 ppm)	3,010 ( 651 ppm)	3.7 ( 1.45 ppm)	88
VP6	7/1/97	3.4	2.6	N/D	197 ( 42.6 ppm)	N/D	49

Table A9: Maximum modeled and measured Cenex site ambient air VOC concentrations

Chemical	Modeled VOC Concentration (24 meters from stack)	Cancer CV	Noncancer CV	Measured Concentration
Chloroform	0.00048 �g/m3 (=0.0024 ppb)	0.04 �g/m3 (CREG)	20 ppb (chronic EMEG)	ND
Vinyl chloride	0.00095 �g/m3 (=0.0024 ppb)	N/A	30 ppb (Int. EMEG)	ND
1,2-DCP	0.1 �g/m3(=0.46 ppb)	N/A	7 ppb (Int. EMEG)	ND
Chlorobenzene	0.00095(=0.0044 ppb)	N/A	18 �g/m3 (EPA Region 3)	ND
1,1-DCE	N/A	0.02 �g/m3 (CREG)	20 ppb (Int. EMEG)	ND

ND = not detected
CV = health comparison value

Table A10: Quincy high school 3-M badge air monitoring results
1,2-dichloropropane
(February 18-23, 1998)

Location	Concentration (µg/m3)	Method detection limit (µg/m3)	EPA RfC (µg/m3)	ATSDR EMEG (µg/m3)
West side of school bldg.	< 4.6	4.6	4	32 (7 ppb)
Boiler Room	< 4.6	4.6	4	32
Boiler Room Sump Basket	< 4.6	4.6	4	32
Kitchen	< 4.6	4.6	4	32
Main Office	< 4.6	4.6	4	32
Staff Lounge	17 (3.7 ppb)	4.6	4	32
Cafeteria	< 4.6	4.6	4	32
Band Room	< 4.6	4.6	4	32
Library	< 4.6	4.6	4	32
Science Room	< 4.6	4.6	4	32
Outside Dugout	< 4.6	4.6	4	32

Shaded cell = contaminant exceeded the EPA reference concentration (RfC)

Table A11: Cenex site child exposure dose estimates and reference doses

Contaminant	Maximum Concentration (mg/kg)	Soil Ingestion Rate (mg/day)	Exposure Duration (years)	Estimated Exposure Dose (mg/kg/day)	EPA Reference Dose (mg/kg/day)
Trifluralin	349	50	10	0.0004	0.0075
Ethalfluralin	1,530	50	10	0.002	0.0075 (used RfD for Trifluralin)
Disulfoton	146	50	10	0.0002	0.00004
Chlorpyrifos	162	50	10	0.0002	0.003
Vernolate	112	50	10	0.0001	0.001
Alachlor	19.8	50	10	0.00003	0.01
Atrazine	38.6	50	10	0.00005	0.035
Cadmium	25.2	50	10	0.000017	0.001
Chromium	360	50	10	0.0002	0.003
Thallium	6.7	50	10	0.000005	0.00008
Beryllium	1.39	50	10	0.00003	0.002

Shaded cell = Estimated dose above EPA reference dose

Table A12: Cenex site adult exposure dose estimates and reference doses

Contaminant	Maximum Concentration (mg/kg)	Soil Ingestion Rate (mg/day)	Exposure Duration (years)	Estimated Exposure Dose (mg/kg/day)	EPA Reference Dose (mg/kg/day)
Trifluralin	349	50	23	0.0003	0.0075
Ethalfluralin	1,530	50	23	0.001	0.0075 (used RfD for Trifluralin)
Disulfoton	146	50	23	0.0001	0.00004
Chlorpyrifos	162	50	23	0.0001	0.003
Vernolate	112	50	23	0.0001	0.001
Alachlor	19.8	50	23	0.00002	0.01
Atrazine	38.6	50	23	0.00003	0.035
Cadmium	25.2	50	23	0.00001	0.001
Chromium	360	50	23	0.0002	0.003
Thallium	6.7	50	23	0.000003	0.00008
Beryllium	1.39	50	23	0.0000007	0.002

Shaded cell = estimated dose above EPA reference dose

Table A13: Estimated child cancer and noncancer risks

Contaminant	Maximum Concentration (mg/kg)	Ingestion Rate (mg/day)	Exposure Duration (years)	Hazard Quotient* (noncancer)	Estimated Increased Cancer Risk
Trifluralin	349	50	10	0.05	5 x 10-7
Ethalfluralin	1,530	50	10	0.27	2 x 10-6
Disulfoton	146	50	10	5	N/A
Chlorpyrifos	162	50	10	0.07	N/A
Vernolate	112	50	10	0.1	N/A
Atrazine	38.6	50	10	0.001	2 x 10-6
Alachlor	19.8	50	10	0.003	3 x 10-7
Beryllium	1.39	50	10	0.015	6 x 10-7
Cadmium	25.2	50	10	0.017	N/A
Chromium	360	50	10	0.07	N/A
Thallium	6.7	50	10	0.06	NA
				Total (Hazard Index) ~ 5.6	Total ~ 5 x 10-6

* = Hazard quotient less than 1 indicates that noncancer health risks are unlikely to result from exposure.
NA = Cancer slope factor not available.

Table A14: Estimated adult cancer and noncancer risks

Contaminant	Maximum Concentration (mg/kg)	Ingestion Rate (mg/day)	Exposure Duration (years)	Hazard Quotient * (noncancer)	Estimated Increased Cancer Risk
Trifluralin	349	50	23	0.04	8 x 10-7
Ethalfluralin	1,530	50	23	0.13	3 x 10-6
Disulfoton	146	50	23	2.5	N/A
Chlorpyrifos	162	50	23	0.03	N/A
Vernolate	112	50	23	0.1	N/A
Atrazine	38.6	50	23	0.0009	2 x 10-6
Alachlor	19.8	50	23	0.002	4 x 10-7
Beryllium	1.39	50	23	0.0006	1 x 10-6
Cadmium	25.2	50	23	0.01	N/A
Chromium	360	50	23	0.07	N/A
Thallium	6.7	50	23	0.04	NA
				Total (Hazard Index) ~ 2.9	Total ~ 7 x 10-6

* = Hazard quotient less than 1 indicates that noncancer health risks are unlikely to result from exposure.
NA = Cancer slope factor not available.

Table A15: Modeled Cenex site dust inhalation cancer and noncancer risks

Contaminant	Soil concentration (mg/kg)	Modeled air concentration	Estimated cancer risk (child)	Hazard Quotient (noncancer risk) (child)	Estimated cancer risk (adult)	Hazard Quotient (noncancer risk) (adult)
atrazine	38.6	5.86E-8	NA	5.5E-7	NA	3.4E-7
alachlor	19.8	3E-8	NA	9.8E-7	NA	6.1E-07
chlorpyrifos	162	2.5E-7	NA	2.7E-5	NA	1.7E-5
disulfoton	146	2.2E-7	NA	1.8E-3	NA	1.1E-3
ethalfluralin	1,530	2.3E-6	7.8E-10	1E-4	7.2E-10	6.3E-5
trifluralin	349	5.3E-7	1.8E-10	2.3E-5	1.7E-10	1.4E-5
thallium	6.7	1E-8	NA	4.2E-5	NA	2.6E-5
vernolate	112	1.7E-7	NA	5.6E-5	NA	3.4E-5
cadmium	25.2	3.8E-8	6.9E-11	1.3E-5	6.9E-11	7.7E-6
chromium	360	5.5E-7	6.6E-9	6E-5	6.6E-9	3.7E-5
beryllium	1.39	2.1E-9	5E-12	3.5E-7	5E-12	2.1E-7
Total (sum of cancer and noncancer risks)			7.6E-9	2.1E-3	7.6E-9	1.3E-3

* = Hazard quotient less than 1 indicates that noncancer health risks are unlikely to result from exposure.
NA = Cancer slope factor not available

APPENDIX B: FIGURES

Figure 1. Statistics Map

Figure 2. Area Map

Figure 3. Regional Map

Figure 4. Site Location Map

Figure 5. Locations where COCs exceeding Method B remain on site

Figure 6. Shallow Groundwater Flow Map

Figure 7. Hydrostratigraphic Cross Section along A-A'

Figure 8. Municipal Well Locations

Next Section     Table of Contents

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