Table 5.

Average bromine and flame retardant content (percent by weight) in pit foam blocks determined by XRF and by laboratory analysis

Sample ID	Foam color	Bromine content by XRF Average (standard deviation)	Bromine-containing flame retardants by laboratory analysis	All measured flame retardants by laboratory analysis
1	White*,†	0.002 (0.0003)	ND	ND
2	White*	1.6 (0.05)	2.9	2.9
3	White*	1.6 (0.06)	3.3	3.3
4	White*	0.001 (0.0003)	0.0012	0.0012
5	Light blue	0.001 (0.0004)	0.0036	3.5
6	Dark blue	0.029 (0.001)	0.023	2.1
7	Dark blue	1.2 (0.07)	1.9	1.9
8	Turquoise	3.3 (0.04)	4.1	4.1
9	Pale yellow	4.1 (0.04)	2.3	2.4
10	Dark blue	1.3 (0.01)	1.4	1.4
11	Light blue	0.002 (0.0003)	0.0034	6.0
12	Turquoise	2.0 (0.02)	2.6	2.6

ND = not detected at or above the minimum detectable concentration of 1 µg/g of foam or 0.0001% bromine by weight

^*White foam was new replacement foam.

^†This block was unused.