Appendix E. Example Risk Presentation Table

Section 7.2.1.1 explains how to present risk results in a clear and organized manner. The following table offers an example of the clear presentation of risk results.

Table E-1. Risk Results Table: Incremental cumulative cancer risk and noncancer hazard index results, On-site, Area 1
Exposure to Soil					Outdoor Worker		Indoor Worker		Construction Worker
Chem Group	Chemical	CASRN	Class	Exposure Conc. (mg/kg)	Soil Exposure		Indoor Air Exposure		Soil Exposure
Chem Group	Chemical	CASRN	Class	Exposure Conc. (mg/kg)	Risk	HQ	Risk	HQ	Risk	HQ
VOC	Benzene	71-43-2	A	0.15	1E-08	0.0002	2E-06	0.02	3E-09	0.0003
VOC	Bromodichloromethane	75-27-4	B2	0.1	8E-10	0.000002			1E-10	0.0003
VOC	Chloroform	67-66-3	B2	0.341	9E-08	0.0002	1E-05	0.02	2E-08	0.001
VOC	Chloromethane	74-87-3	D	103		0.07		4		0.08
VOC	Cumene	98-82-8	D	2.12		0.00007		0.008		0.0003
VOC	1,2-Dichlorobenzene	95-50-1	D	0.083		0.000002		0.0001		0.000001
VOC	1,1-Dichloroethane	75-34-3	SC	7.64		0.0005		0.05		0.0003
VOC	1,2-Dichloroethane	107-06-2	B2	2	4E-07	0.005	4E-05	0.7	7E-08	0.003
VOC	1,1-Dichloroethene	75-35-4	C	1.12		0.0004		0.02		0.002
VOC	Trichloroethene	79-01-6	HC	203	9E-06	3	1E-03	400	2E-06	10
VOC	Vinyl Chloride	75-01-4	A	1.36	3E-07	0.002	8E-06	0.05	6E-08	0.007
VOC	Xylenes (total)	1330-20-7	ID	7.33		0.001		0.1		0.002
SVOC	Benzo(a)pyrene	50-32-8	B2	0.069	2E-07		5E-13		2E-08
SVOC	Chrysene	218-01-9	B2	0.16	4E-10		4E-13		3E-11
SVOC	Dibenz(a,h)anthracene	53-70-3	B2	0.22	6E-07		1E-15		5E-08
SVOC	Fluoranthene	206-44-0	D	0.11		0.000003				0.0000006
SVOC	Fluorene	86-73-7	D	0.046		0.000001				0.0000002
SVOC	Indeno(1,2,3-cd)pyrene	193-39-5	B2	0.1	3E-08		3E-14		2E-09
SVOC	Naphthalene	91-20-3	C	0.717	1E-08	0.0004	2E-07	0.005	2E-09	0.002
SVOC	Phenanthrene	85-01-8	D	0.32		0.00001				0.000002
SVOC	Pyrene	129-00-0	NL	0.11		0.000004				0.0000007
INORG	Arsenic	7440-38-2	A	7	2E-06	0.01			2E-07	0.006
INORG	Cadmium	7440-43-9	B1	3	4E-11	0.002			6E-10	0.005
INORG	Mercury	7439-97-6	D	0.06		0.0002		0.0009		0.0005
				Cumulative Cancer Risk or Hazard Index (HI):	1E-05	3	1E-03	405	2E-06	10

Notes:
Chem Group - chemical group
CASRN - Chemical abstracts service registry number
Class - USEPA Weight-of-Evidence Cancer Classification. Original classifications were (A, B1, B2, C, D, E), these are being replaced with "carcinogenic to humans," "likely to be carcinogenic to humans," "suggestive evidence of carcinogenic potential," "inadequate information to assess carcinogenic potential" and "not likely to be carcinogenic to humans." (USEPA 1986, 2005a)
HC - Human carcinogen
ID - inadequate data to classify as a human carcinogen|
NL - Not likely to be carcinogenic to humans
SC - Suggestive evidence of carcinogenicity but not sufficient to assess human carcinogenic potential
Grey shaded results indicate a cancer risk greater than 10^-4 or noncancer HQ greater than 1.
Bold results indicate a cancer risk greater than 10^-5 or noncancer HQ greater than 0.1
Soil exposure pathways consist of incidental ingestion of soil, dermal contact with soil, and inhalation of fugitive dusts and outdoor vapors
Indoor air pathway considers building occupants exposed to vapors from soil gas infiltrating a hypothetical building

Publication Date: January 2015

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