Table 3.

Contamination levels of individual NPBFRs in exposed hoods before and after a single laundering (ng/g)^A.

	Hoods before laundering (n=4)			Hoods after laundering (n=4)B
Compound	No. above LODC	Mean	Standard deviation	No. above LOD	Mean	Standard deviation	Mean difference (%)	P-value
TBB	4	34.2	25.9	4	28.4	13.7	16.9
TBPH	3	13.9	9.48	4	7.83	6.93	43.5
DBDPE	3	93.1	60.5	4	519	328	458
TBBPA	3	18.7	20.1	0	1.54F	0.317F	−91.8
Total NPBFRs D,E	41%	165	112	38%	562	348	240	0.100

^A.In calculating summary statistics, non-detectable levels were assigned values by taking the limit of detection divided by the square root of 2.

^B.Other hoods included in the wash cycle included new, unexposed hood and hoods used in UL fire attack studies with total NPBFRs ranging from 1360–4860 ng/g.

^C.Not detected in any hoods: BTBPE and HBCD.

^D.Limit of detection for all NPBFRs was 2 ng/g.

^E.Total NPBFR summary statistics include NPBFRs not shown in table (BTBPE and HBCD).

^F.Mean and STD calculated from assigned values (LOD divided by square root of 2) because all samples were below LOD.