19085-1701857-UL_Prop_65_Test_Results_2019

Released by UL Environment
Date Prepared:
February 11, 2019
Report #:
1000339735-1162663EA
©2019 UL LLC
CA Prop 65 Exposure Assessment Page 3 | 15
OVERVIEW AND INTRODUCTION
California’s Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65) is
intended to protect California citizens and the State's drinking water sources from
chemicals known to cause cancer, birth defects or other reproductive harm, and to inform
citizens about exposures to such chemicals. Proposition 65 requires businesses to provide
a warning before they knowingly expose anyone to a chemical that is identified by the State
as causing such harm. For consumer products, the warning often comes in the form of a
label on the product or its packaging. The warning, however, is not required if the exposure
is low enough to pose no significant risk of cancer or is significantly below levels observed
to cause birth defects or other reproductive harm. The California Office of Environmental
Health Hazard Assessment (OEHHA) is the agency responsible for the implementation of
Proposition 65. In that role, it maintains the list of chemicals “known to the State to cause
cancer or reproductive toxicity” (OEHHA 2018a).
The Deflecto’s Execumat Chair Mats, a floor mat intended to be used under a chair, is the
subject of this report. The goal of this assessment is to conservatively quantify a
consumer’s lifetime average daily doses (LADDs) of 1,4-dioxane, acetaldehyde and
cumene that could be released from the Deflecto LLC Execumat Chair Mats within a private
office, school classroom, or home residence. The calculated LADDs, which are based on
the 1,4 dioxane, acetaldehyde and cumene emission rates estimated over the anticipated
product lifetime, are compared to the OEHHA safe harbor value, or the calculated
provisional NSRL in the case of cumene. Results from this exposure assessment are
intended to help Deflecto determine if use of the Execumat Chair Mats within the
occupational or residential environment could result in exposures to 1,4 dioxane,
acetaldehyde or cumene that exceed the safe harbor levels for the listed compounds.
PROPOSITION 65 LISTING AND “NO SIGNIFICANT RISK LEVELS” FOR 1,4
DIOXANE, ACETALDEHYDE AND CUMENE
OEHHA has established daily dose rates, known as safe harbor levels, for many Proposition 65
listed chemicals. The safe harbor value represents an exposure threshold below which
exposures are deemed to pose no significant risk. These safe harbor levels are referred to as
No Significant Risk Levels (NSRLs) for carcinogens and Maximum Allowable Dose Levels
(MADLs) for chemicals causing reproductive toxicity. The latest available list of NSRLs and
MADLs and associated criteria doses is dated April 2018 (OEHHA, 2018b). An NSRL for
Proposition 65 is defined as the intake of a 70-kg adult associated with a lifetime cancer risk of
10
-5
, or lower (OEHHA, 1992a). Exposures resulting in a given level of cancer risk can be
derived from cancer potency values following OEHHA guidance described in Title 27, California
Code of Regulations, Section 25703.
In assessing exposures to carcinogenic VOCs, for comparison to NSRLs, the relevant time
frame for exposure is the long-term average, which typically is a 70-year lifetime.