PUBLIC HEALTH ASSESSMENT

ARMOUR ROAD SITE
NORTH KANSAS CITY, CLAY COUNTY, MISSOURI

APPENDIX A

Figure 1: Armour Road Site Location Map

Figure 2: Armour Road Site Map

Figure 1. Armour Road Site Location Map

Figure 2. Armour Road Site Map

APPENDIX B

Table 1: Armour Road Site Maximum Soil Contamination Levels and Health Comparison Values

Table 2: Armour Road Site Maximum Groundwater Contamination Levels and Health Comparison Values

Table 1.

Contaminant	Maximum DetectedValue	ATSDR ComparisonValue*	DOH ASL Value**
Arsenic	121,000	20	11
Antimony	9,650	20	23
Lead	16,500	N/A	240
Mercury	156	N/A	17
Thallium	1,360	N/A	3.9
Benzo(a)pyrene	24	0.1	0.68
Cadmium	2,220	40	28
2,4-Dichlorophenol	258.5	200	170
PCP	250	50	42

N/A = not available
* EMEG or RMEG for child (EMEG = Environmental Media Evaluation Guide (ATSDR))
(RMEG = Reference Dose Media Evaluation Guide)
** Missouri Department of Health Any-Use Soil Level

Table 2.

Armour Road Site Maximum Groundwater Contamination Levels and Health Comparison Values All values in parts per million (ppm)

Contaminant	Maximum DetectedValue	ATSDR ComparisonValue*	EPA MCL**
Arsenic	2,060	0.003	0.05
PCP	8,062	0.01	0.001
2,4-D	94	0.1	0.07
2,4,5-T	320	0.1	N/A
Cadmium	1	0.007	0.005
Lead	5.8	N/A	0.015***
Mercury	0.033	0.02a	0.002a
Thallium	3.5	0.0004	0.002
2,4-Dimethylphenol	27.566	0.2	N/A
2,4-Dichlorophenol	7.168	0.03	N/A
Phenol	27.32	6	N/A
2,4,5-Trichlorophenol	5.21	1	N/A
2,4,6-Trichlorophenol	4.52	0.4	N/A
Selenium	0.48	0.02	0.05
Antimony	6.1	0.004	0.006

N/A = not available
*EMEG or RMEG for child (EMEG = Environmental Media Evaluation Guide (ATSDR))(RMEG = Reference Dose Media Evaluation Guide)
** EPA MCL = Environmental Protection Agency's Maximum Contaminant Level
*** EPA Action Level
^a = Inorganic mercury

APPENDIX C

Calculations for Cancer Risk

Narrative explanation:

Averaging the ingested dose over a 70 year lifetime, then taking that value by the EPA oral slopefactor results in a carcinogenic risk of .00195 (1.95 x 10^-3). EPA and DOH consider anyincreased lifetime risk of developing cancer which is greater than 1 x 10^-4 to 1 x 10^-6 to beunacceptable. A cancer risk of 1 x 10^-4 and 1 x 10^-6 indicates that an additional 1 in 10,000 and 1in 1,000,000 persons would be expected to get cancer above the normal expected cancer rate. The calculated cancer rate of 1.95 x 10^-3 would add an additional cancer incidence of 1.95 peoplein every 1,000 people. These incidences of cancer would be in addition to the approximately 40%of the population who will develop cancer in their lifetime.

Exposure Factor Calculation:

2 days/week x 12 weeks/year x 5 years = 0.0047
            365 days/year x 70 years

Dose Calculation

Dose = concentration x amount ingested x exposure factor x 10-6 conversion factor
                        Body weight

Assumptions:
Concentration of Arsenic in soil-121,000 mg/kg
Amount of soil ingested per day-100 mg/d
body weight-43 kg

121,000 mg/kg x 100 mg/d x 0.0047 x 10-6 mg/kg = 0.0013 mg/kg/d
                        43 kg

Risk calculation = calculated dose
                            EPA slope factor

                        0.0013 mg/kg/d = 0.00195 or 1.95 x 10-3 risk
                        1.5 mg/kg/d

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