hufig3B

a

a

ne

no change

Release of bonę lead,

ige in bonę lead concentration

	3 a
%VV -	a" a		%vv*
^3*^3 3 i ^3 a ♦ a	3 3 a a		*^***A * ^a*^3 a ^3 a
** »*•* d*	^3 3 a		* *
3* * a“^3 *	a a		a a a* a
a a ^3			_ a a »
^3 ' ^3 a	^3 a		^3 * ^3 a

Lead into circulation

neie decrease in

Release of bonę lead, se in bonę lead concentration

	a ^3 aaa ^3				^3 a^3 3** *
a	a .•V ’ *	3 3 a^33 3 3 3 3 3	-t	3	‘‘W; ******•> * a a^a a a
a	aa'* a ^ *^3 J** / 3* ^3 J* a a ^3 a * ^3 3 a	^3 3 3 a a aa ^3 a	r	3	^3a ^3a^3 * 3* ^3 ,»* a a ^3 39 3 3 3