H o t D i p G a l v a n i z e d S t e e l s E s t i m a t e d S e r v i c e L i f e i n S o i l H i g h C h l o r i d e s 2 0 P P M L o w M o i s t u r e 1 7 5 H i g h C h l o r i d e s 2 0 P P M H i g h M o i s t u r e 1 7 5 Z i n c C o a t i n g T h i c k n e s s m i l s Z i n c C o a t i n g T h i c k n e s s m i l s Z i n c C o a t i n g T h i c k n e s s m i l s Service life is defined as the time to necessary part r eplacement or undergr ound maintenance Z i n c C o a t i n g T h i c k n e s s m i l s L o w C h l o r i d e s 2 0 P P M H i g h M o i s t u r e 7 0 L o w C h l o r i d e s 2 0 P P M L o w M o i s t u r e 7 0 300 250 200 150 100 50 0 10 20 30 40 50 60 300 250 200 150 100 50 0 10 20 30 40 50 60 2 pH79 H O105 pH94 H O50 2 pH66 H O175 2 pH H O 2 pH H O 2 2 pH74 H O268 pH86 H O176 2 pH60 H O400 2 pH H O 2 pH H O 2 300 250 200 150 100 50 0 10 20 30 40 50 60 300 250 200 150 100 50 0 10 20 30 40 50 60 2 pH78 H O193 pH90 H O50 2 pH70 H O400 2 pH H O 2 pH H O 2 2 pH60 H O194 pH70H O50 2 pH50 H O400 2 pH H O 2 pH H O 2 1 m i l 2 5 4 p m 0 5 6 o z f t 3 S e r v i c e l i f e y e a r s S e r v i c e l i f e y e a r s S e r v i c e l i f e y e a r s S e r v i c e l i f e y e a r s 12 H o t D i p G a l v a n i z e d S t e e l s E s t i m a t e d S e r v i c e L i f e i n S o i l