1. (a) For the purposes of the Act, “level in question” means the chemical concentration of a listed chemical for the exposure in question. The exposure in question includes the exposure for which the person n the course of doing business is responsible, and does not include exposure to a listed chemical from any other source or product.
2. (b) For purposes of the Act, “lifetime exposure” means the reasonably anticipated rate of exposure for an individual to a given medium of exposure measured over a lifetime of seventy years.
3. (c) For purposes of Section 25249.10(c) of the Act, the level of exposure to a chemical listed as causing cancer, assuming lifetime exposure at the level in question, shall be determined by multiplying the level in question (stated in terms of a concentration of a chemical in a given medium) times the reasonably anticipated rate of exposure for an individual to the given medium of exposure measured over a lifetime of seventy years.

4. (d) The following assumptions shall be used to calculate the reasonably anticipated rate of exposure to a chemical listed as causing cancer, unless more specific and scientifically appropriate data are available:

   1. (1) For an exposure reasonably expected to affect the general population in any geographic area:

      1. (A) The exposed individual ingests two liters of drinking water per day.
      2. (B) The exposed individual inhales twenty cubic meters of air per day.
      3. (C) The exposed individual has a lifespan of seventy years.

   2. (2) For an exposure reasonably anticipated to affect a certain subpopulation of the general population in any geographic area, specific data (if available) relating to that subpopulation shall be used to determine the level of exposure.

      1. (A) In the absence of more specific and scientifically appropriate data, the following assumptions should be made as appropriate:

         Subpopulation

         Water liters/day

         Air cubic meters/day

         Man (18 + years of age)

         2

         20

         Woman (18 + years of age)

         2

         20

         Woman with conceptus

         2

         20

         Adolescent (10-18 years of age)

         2

         20

         Child (2-10 years of age)

         2

         15

         Infant (0-2 years of age)

         1

         4

      2. (B) For an exposure reasonably expected to affect the conceptus (embryo or fetus), the gestation period for the exposed conceptus is nine months.
   3. (3) For workplace exposures, the exposed worker inhales ten cubic meters of workplace air per eight-hour day, forty hours per week, fifty weeks per year over a forty-year period. The exposed individual from the general population who occasionally enters a workplace inhales 1.25 cubic meters of workplace air for one hour per month for a seventy-year lifetime.
   4. (4) For exposures to consumer products, lifetime exposure shall be calculated using the average rate of intake or exposure for average users of the consumer product, and not on a per capita basis for the general population. The average rate of intake or exposure shall be based on data for use of a general category or categories of consumer products, such as the United States Department of Agriculture Home Economic Research Report, Foods Commonly Eaten by Individuals: Amount Per Day and Per Eating Occasion, where such data are available.

Note: Authority cited: Section 25249.12, Health and Safety Code. Reference: Sections 25249.5, 25249.6, 25249.9, 25249.10 and 25249.11, Health and Safety Code.

History

1. New section filed 2-24-88 as an emergency; operative 2-27-88 (Register 88, No. 11). A Certificate of Compliance must be transmitted to OAL within 120 days or emergency language will be repealed on 6-27-88.

2. New section refiled 6-27-88 as an emergency; operative 6-27-88 (Register 88, No. 27). A Certificate of Compliance must be transmitted to OAL within 120 days or emergency language will be repealed on 10-25-88.

3. New section refiled 10-17-88 as an emergency; operative 10-25-88 (Register 88, No. 44). A Certificate of Compliance must be transmitted to OAL within 120 days or emergency language will be repealed on 2-22-89.

4. New section refiled 2-21-89 as an emergency; operative 2-22-89 (Register 89, No. 10). A Certificate of Compliance must be transmitted to OAL within 120 days or emergency language will be repealed on 6-22-89.

5. Certificate of Compliance including amendment transmitted to OAL 6-9-89 and filed 7-10-89 (Register 89, No. 30).

6. Amendment of section heading and subsections (c) and (d) filed 1-7-2003; operative 2-6-2003 (Register 2003, No. 2).

7. Change without regulatory effect renumbering title 22, section 12721 to title 27, section 25721 filed 6-18-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 25).